CN111919084A - Inter-flange measurement device, program, and method - Google Patents

Abstract

An inter-flange measurement device that measures between flanges that sandwich a washer and are fastened by a plurality of bolts and nuts, comprising: a light irradiation unit (20) which irradiates the flanges with a thin light so that a thin light image is generated on the flanges with a gap therebetween; an imaging unit (16) that acquires an image including a thin light image; and a measuring unit (24) that extracts the flare image data and the flange edge data from the image and measures the gap or the gap step between the flanges. Thereby, positioning of the measurement position with respect to the peripheral surface of the flange and measurement between the flanges are facilitated, and the measurement accuracy is improved.

Description

Inter-flange measuring device, procedure and method

technical field

The present invention relates to measurement techniques for the gap or gap step between flanges sandwiched by washers and fastened by bolts and nuts.

Background technique

Between the pipeline and the pipeline such as a pump, a washer is sandwiched between flanges formed at the ends of the pipeline, and is fastened with a plurality of bolts and nuts attached to the peripheral edge of the flange.

In the tightening of such pipes and the like, it is necessary to fix the flanges while maintaining the parallelism of the flanges by uniformly tightening the gaskets located between the flanges. Therefore, the measurement and management of the gap between the flanges is indispensable.

Regarding the measurement of the gap between such members, there is known a jig having a gauge base spanning between the members, and a wedge-shaped gauge member supported by a scale shaft is inserted into the gap between the members, The insertion amount of the gauge member is converted into the rotation of the dial, and the gap between the members is measured (for example, Patent Document 1).

In contrast to such mechanical measurement, there are known methods of measuring gaps and steps by capturing an irradiated image of slit light with an imaging element (for example, Patent Document 2 and Patent Document 3).

prior art literature

Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 2015-59755

Patent Document 2: Japanese Patent Laid-Open No. 2003-315020

Patent Document 3: Japanese Patent Laid-Open No. 2015-45571

SUMMARY OF THE INVENTION

The problem to be solved by the invention

In the tightening of pipes and the like using flanges, it is essential to align the center axes of the flanges with the gasket sandwiched therebetween, to uniformly apply the tightening axial force to the bolts, and to maintain the parallelism between the flanges. . If the center axes of the flanges are not aligned, gaps or steps will be generated due to the misalignment of the peripheral surfaces of the flanges. If there is a difference in the axial force among the plurality of bolts, the gap between the flanges will vary due to the influence of elastic interaction due to the rigidity of the flange or the washer or the like. Such a change in the gap between the flanges refers to a state in which so-called one-sided tightening occurs. These phenomena depend on the skill level or carelessness of the construction personnel, and if they are left unchecked, the problem of reducing the sealing accuracy between the flanges occurs.

However, in the gap measurement between the members of the wedge-shaped gauge member (Patent Document 1), it is necessary to prepare a gauge member corresponding to the flange to be measured, which is inferior to the gap measurement using a gap gauge.

Most of the flanges used for fastening between pipes are of the circular type. To measure gaps and gap steps on such a circumferential surface, positioning is very troublesome, and there is a problem that the positioning accuracy seriously affects the measurement accuracy.

In such sealing construction between flanges, it is necessary to fasten one flange with a plurality of bolts, and it is necessary to perform multiple times. Therefore, the time required to measure the gap between the flanges is preferably short, and when a plurality of measurement operations take time, there is a problem that the construction time becomes long. If a construction worker neglects the clearance measurement, there is a problem that it also becomes a cause of a decrease in sealing accuracy.

Patent Documents 1 to 3 do not disclose or suggest such requirements and problems, nor do they disclose or suggest structures or the like that solve the requirements and problems.

Therefore, in view of the above-mentioned problems, an object of the present invention is to facilitate the positioning of the measurement position with respect to the peripheral surface of the flange and the measurement between flanges, and to improve the measurement accuracy.

means of solving problems

In order to achieve the above object, according to an aspect of the inter-flange measuring device of the present invention, there is provided an inter-flange measuring device that measures between flanges sandwiching a washer and fastened by a plurality of bolts and nuts, wherein , the inter-flange measuring device has: a light irradiating part that irradiates fine light so that a fine light image is generated on the flanges through the gap between the flanges; an imaging part that captures the fine light including the an image of the image; and a measuring section that extracts fine-light image data and flange edge data from the image, and measures the gap or gap step between the flanges.

In this flange-to-flange measurement device, the light irradiation unit may generate the fine-light image at a measurement position associated with the position of the bolt or the bolt tightening position.

In this flange-to-flange measurement device, the flange-to-flange measurement device may further include an information presentation unit that is associated with identification information of the flange, the position of the bolt, or the bolt tightening position. The measurement of the gap or gap step is prompted.

In this flange-to-flange measurement device, the flange-to-flange measurement device may have a case portion that is positioned to measure the flanges by inserting a positioning guide into a gap between the flanges. position, the positioning guide portion has: an abutting portion that abuts on the peripheral surface of the flange across the measurement position, and a guide protrusion that is formed in a part of the abutting portion and is inserted In the gap, the housing portion is positioned at the measurement position by the abutting portion and the guide protrusion.

In this flange-to-flange measuring device, the housing portion may include a grip portion and an imaging switch, and the imaging switch may be operated while the grip portion is gripped.

In this flange-to-flange measurement device, the flange-to-flange measurement device may further include a communication unit that transmits measurement data, and the communication unit supplies the measurement data to an information terminal through a wired or wireless connection. connected to the communication unit.

In order to achieve the above-mentioned object, according to one aspect of the program of the present invention, there is provided a program for realization by a computer, wherein the program realizes the function of irradiating a thin light from a casing part and causing the thin light to be realized by the computer. generating an image on the flange across the gap between the flanges; acquiring an image containing the microscopic image; and extracting microscopic image data and flange edge data from the image, measuring the distance between the flanges gaps or gap steps.

In this program, the program may further realize the following function through the computer: prompting the gap or the gap step in association with the identification information of the flange, the position of the bolt or the bolt tightening position measurement results.

In order to achieve the above object, according to an aspect of the method for measuring between flanges of the present invention, there is provided a method for measuring between flanges, which measures between flanges sandwiching a washer and fastened by a plurality of bolts and nuts, wherein, This inter-flange measurement method includes the steps of: positioning a housing part at a measurement position between the flanges; irradiating fine light with a light irradiating part to generate a fine-light image across a gap between the flanges on the flange; an image including the fine-lens image is acquired by an imaging unit; and a gap or a gap step between the flanges is measured by extracting the fine-lens image data and flange edge data from the image by a measuring unit .

In this flange-to-flange measurement method, the flange-to-flange measurement method may further include a step of indicating the clearance or Measurement results of gap steps.

Invention effect

According to the present invention, any of the following effects can be obtained.

(1) The housing portion of the measuring device can be easily and accurately positioned with respect to the measurement position of the gap between the flanges, and the gap or the gap step can be easily and quickly measured.

(2) With regard to the sealing operation of the flange fastening with the bolts, it is possible to perform the measurement of the gap or the gap step with high accuracy without laboriousness in the measurement operation.

(3) The reliability of the sealing operation can be improved.

Further, other objects, features, and advantages of the present invention will become more apparent by referring to the accompanying drawings and the respective embodiments.

Description of drawings

FIG. 1 is a diagram showing a configuration example of the inter-flange measuring device according to the first embodiment.

FIG. 2A is a diagram showing an example of a gap measurement process, and FIG. 2B is a diagram showing an example of a gap step measurement process.

FIG. 3 is a flowchart showing an example of the inter-flange measurement process.

FIG. 4 is a diagram showing a configuration example of a flange-to-flange measuring device according to a second embodiment.

FIG. 5 is a perspective view showing the inter-flange measuring device.

6 is a partial cross-sectional view showing an example of the internal structure of the inter-flange measuring device.

FIG. 7 is a diagram showing an example of the measurement operation of the flange-to-flange measurement device.

FIG. 8 is a diagram showing an example of a state in which light is irradiated to a measurement position.

FIG. 9 is a diagram showing a configuration example of a control unit.

FIG. 10 is a diagram showing an example of a measurement result between flanges.

FIG. 11 is a flowchart showing an example of the inter-flange measurement process.

12 is a diagram showing a configuration example of a flange-to-flange measurement system according to a third embodiment.

FIG. 13 is a diagram showing a display example of measurement results.

FIG. 14 is a flowchart showing an example of the inter-flange measurement process.

Detailed ways

[First Embodiment]

<Measurement device 2 between flanges>

FIG. 1 shows a configuration example of the flange-to-flange measuring device according to the first embodiment. The configuration shown in FIG. 1 is an example, and the present invention is not limited to this configuration.

The flange-to-flange measuring device 2 is an example of a measuring unit used for managing the tightening state of the seal construction part 4 which connects, for example, a plurality of pipelines, pipes and valves, pipes and pumps, and the like.

In the sealing construction part 4, for example, as shown in FIG. 1A, a gasket 8 is sandwiched between flanges 6-1 and 6-2 to be fastened, and a gasket 8 is set between the flanges 6-1 and 6-2. The fastening portion of the flat portion of -2 is fastened with the bolt 10 and the nut 12 . That is, the gasket 8 is in a crimped state between the planes of the opposed flanges 6-1 and 6-2.

The flange-to-flange measuring device 2 measures the width of the gap 14 between the opposing surfaces of the flanges 6-1 and 6-2 with the gasket 8 sandwiched between the flanges 6-1 and 6-2 with respect to the seal construction part 4, and indicates the width of the gap 14 between the flanges 6-1 and 6-2. The length of the displaced gap step in the direction parallel to the opposing faces.

The inter-flange measuring device 2 includes, for example, a case portion 16 and a contact portion 18 formed in the case portion 16, and at least a part of the contact portion 18 is inserted into the gap between the flanges 6-1 and 6-2. 14. For example, an entire portion or a leading end portion of the contact portion 18 that is inserted into the gap 14 is formed thinner than the gap 14 .

Further, the case portion 16 includes, for example, a light irradiation portion 20 as a light source that irradiates light to the peripheral surfaces of the flanges 6-1 and 6-2, an imaging portion 22 that captures an image of the measurement position C1, and a measurement portion 24 , which measures the width of the gap 14 or the gap step by using the image captured by the imaging unit 22 . This measurement position C1 is set in association with, for example, the installation positions of the bolts 10 and the nuts 12 provided on the flanges 6-1 and 6-2, and the fastening positions at which the bolts 10 and the nuts 12 are fastened. That is, the inter-flange measuring device 2 measures the gap 14 of the flanges 6-1, 6-2 at the fastening positions of the bolts 10 and the nuts 12 of the flanges 6-1, 6-2 or the positions affected by the fastening. The tightening state of the seal construction part 4 is managed according to the size and the size of the gap step.

The contact portion 18 is an example of the positioning guide portion of the present invention, and the case portion 16 is arranged with respect to the measurement position C1. This contact part 18 has at least two contact arms 18-1 and 18-2 as shown in B of FIG. 1, for example. The contact arms 18 - 1 and 18 - 2 have, for example, the same length La, and protrude from the housing portion 16 in a parallel direction toward the measurement object. Further, the two contact arms 18 - 1 and 18 - 2 are arranged along the peripheral surfaces of the flanges 6 - 1 and 6 - 2 in an orientation capable of being inserted into the gap 14 .

The light irradiation part 20 of the flange-to-flange measurement device 2 irradiates light in parallel with the protruding direction of the contact arms 18-1 and 18-2, for example, within a range sandwiched by the contact arms 18-1 and 18-2. The light irradiation unit 20 is composed of, for example, laser light, infrared light, or other light sources, and irradiates the measurement position C1 directly with light or irradiates the measurement position C1 with slit light that has passed through a slit (not shown), with at least a gap 14 interposed therebetween. On the other hand, thin-light images ( F1 , F2 ) of predetermined lengths are formed on the peripheral surfaces of the two flanges 6 - 1 and 6 - 2 ( FIG. 1A ).

The imaging unit 22 is arranged, for example, in a direction shifted by a predetermined arrangement angle θ with respect to the irradiating direction of light from the light irradiating unit 20 , and takes in the thin edges of the flanges 6 - 1 and 6 - 2 and the gap 14 irradiated to the measurement position C1 . Light image (F1, F2).

In this way, by inserting the contact arms 18 - 1 and 18 - 2 into the gaps 14 , the inter-flange measurement device 2 can maintain, for example, a surface from the light irradiation section 20 to the measurement position C1 of the flanges 6 - 1 and 6 - 2 . Constant irradiation direction and irradiation distance Lb such as vertical or near-vertical angles. The irradiation distance Lb is the distance to the light irradiation position of the flange surface, and is based on the curvature of the flanges 6-1, 6-2, the widths of the contact arms 18-1, 18-2, the contact arms 18-1, 18- 2 It is determined by the contact position with the flange surface, etc. In addition, the imaging unit 22 determines an imaging angle with respect to the irradiated fine-light image and an imaging distance Lc thereof. The lengths of the contact arms 18 - 1 and 18 - 2 are set based on, for example, the focal length of the camera constituting the imaging unit 22 with respect to the measurement position C1 .

The measurement unit 24 is, for example, an example of a functional unit that performs image processing of the image data captured by the imaging unit 22 , and measurement arithmetic processing of gaps or gap steps. In this flange-to-flange measuring device 2 , a so-called optical cutting method is used as a method of measuring a gap or a gap step by performing analysis and arithmetic processing on an image obtained by capturing an image of light irradiated to a measurement object.

FIG. 2 shows an example of measurement processing of gaps and gap steps.

The measurement unit 24 performs, for example, a binarization process, a process of extracting feature points, and the like on the captured image as image processing. This binarization processing is image processing for extracting a fine-light image included in the captured image, and it is only necessary to perform, for example, gradation comparison based on light intensity in the image, and image comparison processing before and after light irradiation.

<Gap measurement>

For example, as shown in A of FIG. 2 , the measurement unit 24 performs processing of extracting feature points from the image from which the fine-light image has been extracted. The measurement unit 24 extracts, for example, data representing the fine-light images F1 and F2 of the fine-light images on the peripheral surfaces of the flanges 6-1 and 6-2, and edges representing the boundaries between the flanges 6-1 and 6-2 and the gap 14. Data Fx1, Fx2.

The measurement unit 24 may perform processing of extracting feature points by analysis processing using the binarized image data, or may analyze and extract a fine-light image from the image captured by the imaging unit 22 by image analysis processing. F1, F2 data and edge data Fx1, Fx2. Regarding the edge data Fx1 and Fx2 , for example, the ends of the data of the thin-light images F1 and F2 may be extracted, or a part of the data of the thin-light images F1 and F2 may be extracted as the ends. Thus, for example, when the front end side of the data of the thin-light images F1 and F2 is in a warped state due to the light in the gap 14 , the measuring unit 24 only needs to extract the straight line portion before the warping as the edge data Fx1 and Fx2 .

For example, a space portion G exists between the edge data Fx1 and Fx2. At the measurement position C1 , the space portion G is in a state in which the light irradiated from the light irradiating portion 20 is not reflected, or the light is reflected in a direction that the imaging portion 22 cannot capture. That is, the space portion G indicates the gap 14, the position where the gap 14 exists, and the like between the flanges 6-1 and 6-2.

Then, the measurement unit 24 calculates the width of the gap 14 by, for example, performing a gap analysis process on the width W between the edge data Fx1 and Fx2 as a gap measurement process. This gap analysis process calculates the width W of the gap 14 using, for example, a calculation algorithm that takes into consideration the irradiation distance Lb, the imaging distance Lc, and the value of the arrangement angle θ of the light irradiation unit 20 and the imaging unit 22 .

<Gap step measurement>

For example, as shown in FIG. 2B , the measurement unit 24 determines the presence or absence of the data of the extracted fine-light images F1 and F2 and the edge data Fx1 and Fx2 indicating the boundaries between the flanges 6 - 1 and 6 - 2 and the gap 14 . Longitudinal displacement, and measure its displacement H. This longitudinal displacement indicates a state in which the flanges 6-1 and 6-2 are displaced in the front-rear direction with respect to the arrangement direction of the flange-to-flange measuring device 2 at the measurement position C1, and a gap step is generated, which is captured in the captured image. The displacement amount is the gap step H of the flanges 6-1, 6-2. The displacement amount is, for example, the sum of the displacement amount h1 in the upward direction and the displacement amount h2 in the downward direction with respect to the reference axis assumed at the time of shooting. Since the opposing surfaces of the flanges 6-1 and 6-2 are, for example, circular, the measured values of the displacement amounts h1 and h2 vary along the circumferential direction of the flanges 6-1 and 6-2. The displacement amounts h1 and h2 at the time of the peripheral surfaces of the flanges 6-1 and 6-2 on the opposite side to the predetermined measurement position C1 are reversed up and down.

As the gap step measurement process, the measurement unit 24 calculates the shift amounts h1 and h2 on the screen from the lengths between the edge data Fx1 and Fx2 and the values obtained by converting them into coordinate values, and takes into account the irradiation distance Lb by calculating the shift amounts h1 and h2 on the screen. The gap step in the front-rear direction of the flanges 6-1 and 6-2 is calculated by using a gap analysis algorithm based on the value of the angle θ of the arrangement angle θ between the light irradiation unit 20 and the imaging unit 22 , the imaging distance Lc, and the light irradiation unit 20 and the imaging unit 22 .

<Measurement process between flanges>

FIG. 3 shows a processing example of the inter-flange measurement. The processing contents and processing procedures shown in FIG. 3 are an example of the inter-flange measurement method or the inter-flange measurement program of the present invention, and the present invention is not limited to this configuration.

In the inter-flange measurement process, the contact arms 18-1 and 18-2 as positioning guides are inserted into the gaps 14 at the measurement positions C1 of the flanges 6-1 and 6-2 (S1). Thereby, the arrangement position, the light irradiation direction, the irradiation angle, and the imaging direction of the flange-to-flange measuring device 2 are stabilized in a predetermined state.

The light irradiation part 20 is turned on, light is irradiated toward the measurement position C1 (S2), and a thin light image is formed on the peripheral surfaces of the flanges 6-1 and 6-2 with the gap 14 interposed therebetween. Then, an image including the thin-light image formed at the measurement position C1 is captured by the imaging unit 22 (S3).

The measurement unit 24 performs, for example, binarization processing, processing of extracting feature points, analysis processing based on values on the image taking into consideration the conditions for taking the image, etc. on the captured image, as analysis processing by the optical cutting method, and measures convexity. The gap between the edges, the gap step (S4).

[Effects of the first embodiment]

According to this configuration, the following effects can be obtained.

(1) By bringing the contact arms 18-1, 18-2 into contact with the flanges 6-1, 6-2, the housing portion 16 can be easily and accurately positioned at the measurement position of the gap 14 between the flanges, The gap or gap step at the measurement location can be measured easily and quickly.

(2) Contrary to the measurement operation using a measuring instrument such as a ruler or a caliper, the gap between the flanges and the gap step are calculated by analyzing the photographed image, so that there is no problem due to the proficiency of the operator, etc. The resulting errors or the recording errors of the measurement results, etc., have improved the measurement accuracy.

(3) The reliability of gap management between flanges is improved.

(4) The work time of the measurement process of the gap and the gap step can be shortened.

[Second Embodiment]

<Structure of measuring device between flanges>

4 and 5 show a configuration example of the flange-to-flange measuring device according to the second embodiment. The structures shown in FIGS. 4 and 5 are examples.

In this flange-to-flange measuring device 30 , for example, as shown in FIG. 4A , two contact pieces 34 - 1 and 34 - 2 are formed in parallel on the front surface side of the case portion 32 . The contact pieces 34-1 and 34-2 have, for example, an insertion piece 36 narrow in the width direction of the front end portion. The insertion piece 36 is an example of the guide protrusion of the present invention. Further, the contact pieces 34-1 and 34-2 and the insertion piece 36 constitute the positioning guide portion of the present invention, and the housing can be positioned by inserting the insertion piece 36 into the gap 14 between the flanges 6-1 and 6-2. Section 32 is positioned in the measurement position. The contact pieces 34 - 1 and 34 - 2 are formed so as to be detachable from the case portion 32 , for example.

In addition, an operation portion 38 is provided on the back side of the case portion 32 . This operation part 38 may be comprised integrally with the case part 32, for example, or may be comprised as an independent operation member detachably, and may be provided in the back surface part of the case part 32. The operation unit 38 includes, for example, a gripping portion 40 that can be grasped by a measurement operator to carry the case portion 32 , and an input formed on an end side of the gripping portion 40 to perform measurement operations such as power-on, light irradiation, and imaging. Operate the trigger switch 42 .

For example, as shown in FIG. 4B , on the upper surface side of the flange-to-flange measuring device 30 , an information presentation portion 46 is formed on a part or all of the top surface of the case portion 32 . In addition to the display monitor 48, the information presentation unit 46 may have, for example, a display lamp (not shown).

The display monitor 48 may display, for example, an image captured by an imaging unit to be described later, in addition to displaying a work instruction screen for the operator and a selection and operation screen related to measurement processing.

In addition, the contact pieces 34-1 and 34-2 are formed with, for example, abutting portions 37, which contact with each other when the insertion pieces 36 are inserted into the gaps 14 between the flanges 6-1 and 6-2. The peripheral surfaces of the flanges 6-1 and 6-2 are in contact with each other. The abutting portion 37 may be formed, for example, in a plane shape in a direction perpendicular to the protruding directions of the contact pieces 34-1 and 34-2, or may be formed in a peripheral surface of the flanges 6-1 and 6-2 that are in contact with each other. corresponding surface shape. For example, the contact pieces 34-1 and 34-2 may have contact pieces 44A and 44B formed with a predetermined width at both ends, which are open at the center, so as to reduce weight and improve visibility during measurement work.

For example, as shown in FIG. 4C , on the front surface side of the case portion 32 , between the contact pieces 34 - 1 and 34 - 2 that are parallel in the up-down direction, there is a projection for taking in in addition to passing light. The measurement area of the image of the edge. The case portion 32 has, for example, a light-emitting unit 50 for irradiating the flange peripheral surface with light through the measurement area. On the lower side of the light-emitting unit 50, there is a light-emitting unit 50 for passing through the measurement area and imaging the flanges 6-1 and 6-. Inside the imaging window portion on the peripheral surface of 2, there are an objective lens 52 and a camera 54 that takes an image through the imaging window portion. The light emitting unit 50 is an example of the light irradiating part of the present invention, and irradiates the measurement position with light from, for example, a measurement window opened at a position close to the upper contact piece 34 .

For example, as shown in FIG. 5A , at least the objective lens 52 is displaced upward at a predetermined angle with respect to the measurement area formed by the contact pieces 34 - 1 and 34 - 2 in contact with the measurement site. The arrangement orientation of the objective lens 52 is set at an angle that can capture the image in the peripheral surface direction of the flanges 6-1 and 6-2 on which the image of the light irradiated by the light emitting unit 50 is formed.

In addition to this, the front surface portion 55 of the case portion 32 may, for example, form an inclined surface obtained by inclining a portion on the lower side of the contact piece 34-2. On the inner side of the front surface portion 55 of the housing portion 32, for example, a camera 54 provided in the housing 32 in accordance with the arrangement angle of the objective lens 52 is mounted. In addition, this front surface part 55 can also be used as a holding part for an operator who performs measurement processing to hold the casing part 32 .

In addition to this, the grip portion 40 on the rear side of the case may be arranged at the center with respect to the left and right ends of the case portion 32 as shown in, for example, B in FIG. The arm or any of the left and right arms of the grip portion 40 is formed at a position biased in the left or right direction.

<Internal structure of measuring device between flanges>

FIG. 6 shows an example of the internal structure of the inter-flange measuring device.

For example, as shown in FIG. 6 , the inside of the casing 32 includes a light emitting unit 50 disposed toward the front surface side of the casing 32 , an objective lens 52 and a camera 54 inclined according to the photographic subject. In addition, the control unit 56 is provided with the control unit 56 which, in addition to outputting an operation instruction to the light-emitting unit 50 and the camera 54, also acquires and analyzes the measured image data. In addition, the control unit 56 is electrically or physically connected to the trigger switch 42 , and is notified of whether or not the trigger switch 42 is pressed.

<Gap and gap step measurement>

FIG. 7 shows an example of a state in which gaps and gap steps are measured using the inter-flange measuring device.

For example, as shown in FIG. 7A , in the flange-to-flange measurement device 30 , the operator holds the grip portion 40 and arranges the contact pieces 34 - 1 and 34 - 2 with respect to the seal construction portion 4 to be measured. At this time, the operator arranges the respective insertion pieces 36 of the contact pieces 34-1 and 34-2 in a direction in which they can be inserted into the gaps 14 between the flanges 6-1 and 6-2. In addition, in the gap and gap step measurement processing, for example, one or more measurement positions C are set along the peripheral surfaces of the flanges 6-1 and 6-2, and the operator needs to arrange the protrusions relative to the predetermined measurement positions C. Edge measurement device 30 . Regarding the determination of the measurement position C and the instruction to the operator, for example, the flanges 6-1, 6-2, the washer 8 in the gap 14, the bolt 10 and the nut 12 may be marked with a reference number indicating the measurement position, or it may be time setting. Regarding the measurement position, for example, the first measurement position determined by the operator may be used as the reference position, and the position shifted by a predetermined angle from the position with respect to the central axis of the flanges 6-1 and 6-2 may be set as the next measurement position. Location.

In addition, the control unit 56 of the flange-to-flange measurement device 30 can read the identification tag information provided on the bolt 10 or the nut 12 by, for example, the camera 54 or a collation unit (not shown), and determine whether it is the set measurement position.

For example, as shown in B of FIG. 7 , when the trigger switch 42 is operated in a state where the insertion piece 36 is inserted into the gap 14 and the contact pieces 34 - 1 and 34 - 2 are both in contact with the peripheral surface of the flange, the flange The time measuring device 30 emits light by the light emitting unit 50 and performs imaging processing by the camera 54 .

The light emitting unit 50 irradiates light in a direction perpendicular to, for example, the peripheral surfaces of the flanges 6 - 1 and 6 - 2 and the opening surface of the gap 14 . Thus, for example, as shown in FIG. 8A , on the surfaces of the flanges 6 - 1 and 6 - 2 , with the gap 14 interposed therebetween, the light irradiated from the light emitting unit 50 forms fine light images F1 and F2 ( FIG. 8 of B). In addition, inside the gap 14 , for example, a thin light image is formed on a part of the opposing surfaces of the flanges 6 - 1 and 6 - 2 , and as shown in B of FIG. 8 , light is also irradiated inside the gap 14 . The peripheral surface of the gasket 8 forms a fine light image F3.

The camera 54 of the flange-to-flange measurement device 30 is disposed at a position displaced by a predetermined angle with respect to the light-emitting unit 50, and the focal length of the imaging is adjusted to the peripheral surfaces of the flanges 6-1 and 6-2. That is, since the two contact pieces 34 - 1 and 34 - 2 are arranged along the gap, the camera 54 is displaced from the light emitting unit 50 along the opening direction of the gap 14 of the sealing construction portion 4 from the direction inclined with respect to the measurement position C Take a low-light image. Accordingly, the camera 54 may capture and capture the fine-light images F1 and F2 formed at least on the surfaces of the flanges 6-1 and 6-2, for example, by irradiating the flanges 6-1 and 6-2. The image formed by the light on the opposing surface of -2 and the image formed by irradiating the gasket 8.

<Control unit 56>

FIG. 9 shows an example of the configuration of the control unit of the flange-to-flange measuring device.

The control unit 56 is a control unit of the inter-flange measurement device 30 and is an example of an inter-flange measurement management unit.

The control unit 56 is constituted by, for example, a computer, and includes a processor 60 , a storage unit 62 , an input/output unit (I/O) 64 , a touch sensor 66 , a communication unit 68 , and a display monitor 48 .

The processor 60 is an example of a processing unit, and performs arithmetic processing such as an OS (Operating System) in the storage unit 62 and an inter-flange measurement program. This arithmetic processing includes, in addition to image processing such as light emission control of the light emitting unit 50 performed in accordance with the operation of the trigger switch 42, photographing processing of the camera 54, binarization of the fine light images F1 and F2, and other image processing for extracting fine light images. In addition to the analysis processing of the data of F1 and F2 and the edge data Fx1 and Fx2, and the processing of calculating the width W and the gap step H of the edge data Fx1 and Fx2 representing the gap 14 based on the analysis results, it also includes displaying the measurement on the monitor 48. Processing of results, etc.

The storage unit 62 is used to store the OS, the inter-flange measurement program, record the captured images, store the analysis results and calculation results, and the like, and has a ROM (Read Only Memory) and a RAM (Random Access Memory) memory). The storage unit 62 only needs to use a storage element capable of holding storage contents.

I/O 64 is controlled by processor 60 for inputting and outputting control information. To this I/O 64, for example, a touch sensor 66, a display monitor 48, a camera 54, and a light-emitting unit 50 are connected. In addition to this, for example, a bar code reader, a removable external memory, or the like for identifying flanges, washers, bolts, nuts, etc. may be connected to the inter-flange measuring device 30 . A barcode reader is an example of an information acquisition unit. The external memory is a memory from which log information is taken out, and for example, a USB (Universal Serial Bus) memory may be used.

The touch sensor 66 is an example of a unit forming the information presentation unit 46 , and is used for triggering input of input information, triggering extraction of output information, mode switching, and the like by detecting the operator's touch operation in accordance with the display screen of the display monitor 48 .

The communication part 68 is controlled by the processor 60 and is used for wireless connection with an external device or Internet connection.

<About the measurement results>

FIG. 10 shows an example of the measurement results of the gap and the gap step.

For example, as shown in FIG. 10 , the measurement data 70 calculated by the analysis process is stored in the storage unit 62 . The measurement data 70 stores results obtained by analyzing the data of the fine-light images F1 and F2 and the edge data Fx1 and Fx2 included in the captured image by a predetermined calculation algorithm. For example, as shown in FIG. 10A , in this measurement data 70 , the gap width W14 and the gap step H are stored for each measurement position C, respectively.

In addition, the control part 56 may generate|occur|produce the display screen which can visually compare the clearance gap or clearance gap between measurement parts, for example using the image data which were picked up. For example, as shown in B of FIG. 10 , a measurement result screen obtained by extracting the data of the captured fine-light images F1 and F2 and the edge data Fx1 and Fx2 thereof is displayed on the display monitor 48 . On the measurement result screen, for example, data obtained by photographing and analyzing the measurement sites C1 to C3 may be displayed in combination with a comparison line (broken line display) that can be compared. By displaying the measurement sites in a comparable manner in this way, it is possible to grasp the width W of the gap 14 and the displacement of the gap step H for each measurement position.

<Measurement process between flanges>

FIG. 11 shows a processing example of the measurement between flanges. The processing contents and processing procedures shown in FIG. 11 are an example of the inter-flange measurement method or the inter-flange measurement program of the present invention, and the present invention is not limited to this configuration.

In the inter-flange measurement process, the insertion pieces 36 of the contact pieces 34-1 and 34-2 as positioning guides are inserted into the gaps 14 at the measurement positions C set to the flanges (S11). Thereby, the arrangement position, the light irradiation direction, the irradiation angle, and the imaging direction of the flange-to-flange measuring device 2 are stabilized in a predetermined state.

When the operation of pressing the trigger switch 42 is detected ( S12 ), the control section 56 turns on the light emitting unit 50 to irradiate light toward the measurement position C1 ( S13 ), and captures the thin light including the thin light formed at the measurement position C by the camera 54 image (S14).

The control part 56 performs the measurement process of a gap and a gap step by image analysis (S15). For this measurement process, for example, the process described in S4 and the like in FIG. 3 may be performed. Then, the control unit 56 causes the display monitor 48 to display the measurement results of the gap and the gap step (S16).

[Effects of the second embodiment]

According to such a configuration, the following effects can be obtained.

(1) In the formation of the thin-light image used for the measurement of the gap and the gap step, the irradiation direction and distance of the light, and the imaging angle are determined by the plurality of contact pieces 34-1 and 34-2, so that each contact piece 34-1 and 34-2 is suppressed. The operator's measurement results deviate, and high-precision measurement processing is performed.

(2) The number of steps in which human errors such as visual confirmation errors and work proficiency errors of operators may occur is reduced, and thus the measurement of gaps or gap steps and the management of sealing construction processing are improved.

(3) The gap or gap step measurement process can be performed by a simple operation of arranging the device at the measurement position and operating the trigger switch, so that the work time of the sealing construction process can be shortened, and since the measurement time is short, even if The number of clearance confirmation steps is increased, and the tightening accuracy of the flange is improved without increasing the flange tightening load.

(4) By displaying the results measured at a plurality of locations of the flange in a comparative manner, the sealing construction state can be visually grasped, and the location where construction is insufficient can be easily estimated.

[Third Embodiment]

FIG. 12 shows a configuration example of the flange-to-flange measurement system according to the third embodiment. The structure shown in FIG. 12 is an example, and the present invention is not limited to this structure. In FIG. 12 , the same reference numerals are assigned to the same parts as those in FIGS. 1 and 4 .

For example, as shown in FIG. 12 , the flange-to-flange measurement system 80 includes an information terminal device 82 and an flange-to-flange measurement device 30 that measures the gap of the seal construction portion 4 .

The flange-to-flange measuring device 30 has the same structure as the above-mentioned structure, and therefore its description is omitted.

The information terminal device 82 is connected to the flange-to-flange measuring device 30 by wire or wirelessly.

The information terminal device 82 may have, for example, in addition to the function of taking in and managing the gap and gap step measurement results measured by the flange-to-flange measuring device 30 , the fine-light image captured by the flange-to-flange measuring device 30 can be taken in. Data and image processing and analysis processing functions. In addition to this, the information terminal device 82 may output a control instruction to the flange-to-flange measurement device 30, for example.

The information terminal device 82 is constituted by, for example, a controller terminal operating in conjunction with the flange-to-flange measurement device 30 , a PC (Personal Computer), a server device, or the like, and includes a processing device 84 , an input device 86 , and a display device 88 .

In addition, the information terminal device 82 is connected to, for example, a sealing construction device that performs the tightening process of the bolt 10 and the nut 12 of the sealing construction part 4, and stores the axial force detected in the sealing construction process, and the information for the sealing construction. Setting information such as the tightening torque value set by the device, information on the tightening position of the seal construction part 4 , and the like.

The processing device 84 of the information terminal device 82 generates, for example, a display screen that displays detection results such as the tightening position information acquired in the sealing construction management process, the detected axial force, and the like. Further, for example, as shown in FIG. 13 , the processing device 84 may combine the tightening position information of bolts and nuts obtained in the sealing construction management with the gap and gap step information obtained or calculated in the inter-flange measurement process. Then, the tightening result screen 90 is generated. In the tightening result screen 90, for example, eight tightening positions (1) to (8) indicating the tightening positions of the bolt and the nut are set. In addition, the measured gap information and the information of the measurement positions C1 to C4 of the four gaps are input on this screen. The processing device 84 may combine the results of the clearance measurement at the positions C1 to C4 with the fastening positions (1) to (8), for example, and perform the prediction processing of clearances other than the measurement positions. In this prediction process, for example, previous gap measurement information may be used to calculate a change trend of the gap state between a plurality of measurement positions.

By combining the measurement results in this way, it is possible to visually grasp that the gap 14 between the fastening positions ( 1 ) to ( 8 ) varies. The difference in the gaps 14 between the measuring positions or between the tightening positions is influenced by the deviation of the tightening axial force of the bolts and nuts of each tightening location. In addition, in the flanges 6-1 and 6-2, for example, in the case where the fastening of a part of the fastening parts is relatively strong, the difference is 180° on the opposite side across the central axis, that is, around the central axis of the flanges At a position close to an angle of 180°, the tightening becomes weak and the width W of the gap 14 becomes a so-called one-side tightening state. Therefore, the one-side tightening bolt can be grasped according to the variation of the gap.

<Measurement process between flanges>

FIG. 14 shows an example of measurement processing of the flange-to-flange measurement system. The processing contents and processing procedures shown in FIG. 14 are an example of the inter-flange measurement method or the inter-flange measurement program of the present invention, and the present invention is not limited to this configuration.

The seal construction unit 4 performs, for example, a flange tightening process based on an operation of tightening a bolt and a nut using a tightening tool not shown ( S21 ).

As the inter-flange measurement process, the inter-flange measurement device 30 is installed at the set measurement position (S22), and the process of light irradiation and imaging of the measurement position is performed by pressing the trigger switch (S23). Then, the inter-flange measuring device 30 or the information terminal device 82 acquires the captured image information to perform a process of calculating a gap or a gap step, and transmission and reception between the flange-to-flange measuring device 30 and the information processing device 82 are based on the calculation the measurement result (S24).

In the information terminal device 82 , the gap management process is performed on the measurement result for the measurement position, and the image generation process is performed using the axial force management information and the like stored in the seal construction management process ( S25 ). Then, the information terminal device 82 causes the display device 88 to display the gap management image (S26).

In addition, the gap management image may be transmitted from the information terminal device 82 to the flange-to-flange measurement device 30 and displayed on the display monitor 48, for example.

[Effects of the third embodiment]

According to such a configuration, the following effects are obtained.

(1) Since the flange tightening state can be managed in association with the tightening process of the bolt and the nut, the convenience and reliability of the seal construction management can be improved.

(2) It is possible to facilitate the measurement and management of the tightening state of the flange at the tightening position or the measuring position, thereby improving convenience.

(3) Since the process of measuring the gap between the flanges is simplified, the confirmation after the tightening operation and the tightening or re-tightening operation can be performed quickly, thereby improving the working efficiency and reducing the working time.

(4) Since the process of measuring the gap between the flanges is simplified, the loosening of the screw that changes with time can be confirmed, and the work of reinforcement or re-tightening can be carried out quickly, so that the work efficiency is improved and the work time is reduced. Improved reliability of seal construction management over a long period of time.

[Other Embodiments]

(1) The inter-flange measurement device 30 may use, for example, the monitor 48 to perform the process of guiding the measurement process and the measurement process.

(2) The monitor 48 of the flange-to-flange measurement device 30 is not limited to, for example, a function of displaying measurement results. The monitor 48 may function as a so-called viewfinder for displaying image information captured by the camera 50 in real time, for example. Thereby, when the inter-flange measurement device 30 is arranged at the measurement position C1 , in addition to visual confirmation from outside the device, it is possible to perform the work of arranging the device while checking the image actually captured.

Furthermore, for example, an instruction screen for instructing the operator of the arrangement position may be displayed on the monitor 48 . Thereby, the device can be accurately arranged at the set position, and the accuracy of gap monitoring can be improved.

(3) In the above-described embodiment, the case where the arrangement angle θ of the imaging unit 22 with respect to the light irradiation unit 20 is fixed is shown, but the present invention is not limited to this. The arrangement angle θ may be adjusted according to, for example, the size of the diameter of the flange to be measured, or the like.

(4) In the above-described embodiment, the process of calculating the gap or gap step between the flanges by capturing the fine-light images F1 and F2 formed on the peripheral surfaces of the flanges 6-1 and 6-2 is shown. Not limited to this. In the imaging unit 22 including the camera 54 , for example, the fine-light images F1 and F2 formed on the peripheral surfaces of the flanges 6 - 1 and 6 - 2 and the fine-light image F3 formed inside the gap 14 may be taken together. , which is used for the measurement of gaps or gap steps by analyzing the thin-light image data and edge data. That is, with respect to the fine light image F3 formed inside the gap 14, for example, the difference in the focal length of the imaging unit 22, the difference in the intensity of reflected light, etc. may be analyzed, and the inside of the gap 14 may be measured using the length of the fine light image F3, etc. width.

In addition, as the tightening state of the gasket in the gap 14 , it may be used for sealing construction management by detecting whether the gasket is in a waviness state, the gasket wrinkling, or the degree of gasket crushing by image analysis of the thin light image F3 .

(5) In addition, in the flange-to-flange measurement device 30, different switches may be provided for the light emission of the light emitting unit 50 and the imaging processing of the camera 54.

(6) In the above-described embodiment, the case where the contact portions 37 of the contact pieces 34-1 and 34-2 serving as the contact portions 18 and the side surfaces of the flanges 6-1 and 6-2 are made at the measurement position. The insertion pieces 36 located at the front ends of the contact pieces 34-1 and 34-2 are inserted into the gap 14 to measure the gap and the gap step, but not limited to this. In the inter-flange measurement process, for example, the inter-flange measurement process may be performed while the contact pieces 34-1 and 34-2 are not in contact with the flanges 6-1 and 6-2. In this case, the contact pieces 34 - 1 and 34 - 2 can be removed, for example, from the housing parts 16 and 32 of the flange-to-flange measuring devices 2 and 30 . In addition, in the inter-flange measurement process, the inter-flange measurement devices 2 and 30 can be positioned in the gaps 14 of the flanges 6-1 and 6-2 by, for example, an operator's eyesight or a positioning jig not shown. to set the irradiation distance Lb. In addition, the flange measuring apparatuses 2 and 30 may be provided with, for example, a function of determining whether or not the measurement position is an appropriate measurement position and whether or not the irradiation distance Lb or the imaging distance Lc is arranged using a display monitor or the like. In addition, the camera 54 may adjust the imaging distance Lc, which is related to the distance from the camera 54 to the side surfaces of the flanges 6-1 and 6-2 that are the measurement objects, by using, for example, an AF (Auto Focus) function. The fine-light image or gap 14 distance corresponds.

As described above, the most preferable embodiment of the present invention has been described. The present invention is not limited to the above description. Various modifications and changes can be made by those skilled in the art based on the gist of the invention described in the claims or disclosed in the form for carrying out the invention. Of course, such modifications and changes are also included in the scope of the present invention.

Industrial Availability

In the flange-to-flange measuring device, program, and method of the present invention, conditions such as the irradiation distance and the image acquisition distance of the generated thin light image are fixed at the set measurement position, and the flange-to-flange distance is calculated by image analysis. Therefore, it is beneficial to realize the facilitation of the measurement operation and the improvement of the measurement accuracy, and the stabilization of the measurement results.

Label description

2, 30: Measuring device between flanges; 4: Seal construction part; 6-1, 6-2: Flange; 8: Washer; 10: Bolt; 12: Nut; 14: Clearance; 16, 32: Shell part ; 18: Contact part; 18-1, 18-2: Contact arm; 20: Light irradiation part; 22: Image pickup part; 24: Measurement part; : contact part; 38: operation part; 40: grip part; 42: trigger switch; 44A, 44B: contact piece; 46: information display part; 48: display monitor; : camera; 55: tilt unit; 56: control unit; 60: processor; 62: storage unit; 64: input/output unit (I/O); 66: touch sensor; 68: communication unit; : measuring system between flanges; 82: information terminal device; 84: processing device; 86: input device; 88: display device.

Claims (10)

1. An inter-flange measuring device, which measures between flanges sandwiched by a washer and fastened by a plurality of bolts and nuts, characterized in that, The inter-flange measuring device has: a light irradiating portion that irradiates fine light so that a fine light image is generated on the flanges across the gap between the flanges; an imaging unit that acquires an image including the fine-light image; and A measuring section that extracts fine-light image data and flange edge data from the image, and measures a gap or gap step between the flanges. 2. The inter-flange measuring device according to claim 1, wherein: The light irradiation section generates the thin light image at a measurement position associated with the position of the bolt or the bolt tightening position. 3. The inter-flange measuring device according to claim 1, wherein The inter-flange measuring device further includes an information presenting portion that presents the measurement result of the gap or the gap step in association with the identification information of the flange, the position of the bolt, or the bolt tightening position. 4. The inter-flange measuring device according to claim 1, wherein The inter-flange measuring device has a housing portion that is positioned at a measurement position of the flanges by inserting the positioning guide portion into the gap between the flanges, The positioning guide has: an abutting portion abutting the peripheral surface of the flange across the measurement position; and a guide protrusion formed on a part of the abutting part and inserted into the gap, The housing portion is positioned at the measurement position by the abutment portion and the guide protrusion. 5. The inter-flange measuring device according to claim 1, wherein The housing portion has a grip portion and an imaging switch, and the imaging switch can be operated while the grip portion is gripped. 6. The inter-flange measuring device according to claim 1, wherein The said flange-to-flange measurement apparatus further has the communication part which transmits measurement data, and this communication part supplies the said measurement data to the information terminal connected to this communication part by wire or wireless. 7. A program for realizing by a computer, characterized in that, This program is used to implement the following functions by the computer: The thin light is irradiated from the housing part, so that the thin light image is generated on the flange through the gap between the flanges; acquiring an image containing the thin light image; and Microscopic image data and flange edge data are extracted from the images, and gaps or gap steps between the flanges are measured. 8. The program of claim 7, wherein: The program is also used for realizing the following function by the computer: prompting the measurement result of the gap or the gap step in association with the identification information of the position of the flange, the bolt or the bolt tightening position. 9. A method of measuring between flanges, measuring between flanges sandwiched by a washer and fastened by a plurality of bolts and nuts, characterized in that, The inter-flange measurement method includes the following steps: positioning the housing portion at the measurement position between the flanges; The thin light is irradiated by the light irradiating part, so that the thin light image is generated on the flange through the gap between the flanges; acquiring an image including the fine-light image by the imaging unit; and The gap between the flanges or the gap step is measured by extracting the thin-light image data and the flange edge data from the image by the measuring section. 10. The method for measuring between flanges according to claim 9, wherein, The inter-flange measurement method further includes a step of presenting the measurement result of the gap or the gap step in association with the identification information of the flange, the position of the bolt, or the bolt tightening position.

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