WO2014148720A1 - Système de détection de pression - Google Patents

Système de détection de pression Download PDF

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Publication number
WO2014148720A1
WO2014148720A1 PCT/KR2013/010800 KR2013010800W WO2014148720A1 WO 2014148720 A1 WO2014148720 A1 WO 2014148720A1 KR 2013010800 W KR2013010800 W KR 2013010800W WO 2014148720 A1 WO2014148720 A1 WO 2014148720A1
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WIPO (PCT)
Prior art keywords
optical fiber
optical
pressure
optical fibers
light leakage
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Ceased
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PCT/KR2013/010800
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English (en)
Korean (ko)
Inventor
전진홍
박만규
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FNT CO Ltd
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FNT CO Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
    • G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
    • G01L11/02—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means
    • G01L11/025—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by optical means using a pressure-sensitive optical fibre

Definitions

  • the present invention relates to a system for detecting pressure, and more particularly, to a pressure detecting system capable of simply detecting the magnitude of pressure applied to a predetermined surface and its pressure distribution.
  • a sensor such as a piezoelectric sensor or a load cell is used as a method of detecting an applied pressure.
  • a piezoelectric sensor is a device that measures pressure, acceleration, or strain by using a piezoelectric effect and converts it into an electrical signal. The amount of electricity that appears when applying pressure to the piezoelectric element using a piezo-resistive effect that generates electromotive force when pressure is applied. To measure the degree of pressure.
  • the load cell is deformed, such as being compressed or stretched when it receives weight, and the strain measuring device detects the deformation as an electrical signal and converts it into a digital signal by a computer device to measure the pressure.
  • such a piezoelectric sensor or load cell is excellent in detecting the pressure acting at a certain point, but it is difficult to measure the pressure applied or acting on a certain surface, and it is difficult to determine the pressure distribution applied on a certain surface. have.
  • the present invention has been made to solve the above problems, and an object of the present invention is to provide a pressure detection system capable of simply measuring pressure or detecting pressure distribution at low cost.
  • a plurality of are arranged so as to have a constant interval from each other, the first optical fiber in which at least one light leakage portion is formed;
  • a plurality of second optical fibers disposed to cross the first optical fiber so as to have a predetermined distance from each other, and at least one light leakage portion formed;
  • An optical signal transmission module for generating and outputting an optical signal therein through one end of the first optical fiber and the second optical fiber;
  • An optical signal receiving module for receiving an optical signal output from the first optical fiber and the second optical fiber, converting the optical signal into an electrical signal and outputting the electrical signal;
  • a controller configured to determine an optical transmission ratio of the first and second optical fibers by analyzing the optical signals output from the optical signal receiving module, wherein the optical leakage unit is formed at a degree of bending of the first and second optical fibers. Accordingly, the amount of light leakage from the optical fiber is changed and is formed by cutting in the direction crossing the longitudinal direction of the first and second optical fibers.
  • the cutting depth of the light leakage portion is formed deeper than the thickness of the cladding (cladding) of the optical fiber, more preferably is formed to a depth of 1% to 10% of the diameter of the optical fiber.
  • optical fiber has only been proposed to prevent the leakage of light to the outside as much as possible to transmit 100% of the light from the one end to the other end of the optical fiber (core) as a transmission path, but intentionally the length of the optical fiber
  • a light leakage portion that can selectively leak light along the direction, it is possible to detect the degree of bending of the optical fiber by determining the rate of light transmission from one end to the other end of the optical fiber, that is, the light transmission rate.
  • the light transmission rate is close to 100% from one end to the other end of the optical fiber.
  • the light leakage portion is expanded or enlarged according to the degree of the optical fiber, and light leaks to the outside. As a result, the light transmission rate is lowered, and finally, by analyzing the light transmission rate, it is possible to determine the bending state of the optical fiber.
  • the degree of bending of the optical fiber By determining the degree of bending of the optical fiber, it can be utilized in many applications such as pressure detection and even pressure distribution detection as the optical fiber, the operation state detection of the detection object, safety diagnosis of the structure, and medical instruments.
  • this principle of pressure detection or pressure distribution detection can be applied to security systems. For example, if the fiber is cross-arranged to form a mat or sheet and installed on the floor of a building that requires security, when an unauthorized outsider enters the fiber, the fiber is transformed into a sheet or mat downward by the load. As a result, the optical fiber is bent and the light transmission rate is changed, so that the alarm sound or the manager can be called.
  • the optical fiber is installed in clothing such as a joint part or muscle part of a human body
  • the optical transmission rate is changed according to the bending of the fiber accordingly. Judging the changed amount, it is possible to determine how much the joint is bent and how much the muscle is swelled.
  • various cameras should be installed in a specific place (for example, a studio) to capture the operation state of the object to be detected or to attach the marker to the body to capture the operation state to determine the operation state.
  • a specific place for example, a studio
  • the expensive equipment installed in the studio cannot be installed and
  • the use of a simple optical fiber, such as the present invention makes it simple to grasp the current state of an operator who is put into operation.
  • the light transmission rate is detected close to 100% in the initial state, that is, in a state of being kept in a straight state, but the light transmission rate is an example when the building or the bridge is bent. For example, if they fall to 80% or 70%, they can be notified of the risk of collapse of the structure in advance or take immediate action.
  • the optical fiber is periodically bent and restored to its original state by the heartbeat or pulse, and thus the light transmission rate changes regularly. It can be applied to calculate heart rate or pulse rate using periodic change.
  • control unit it is preferable to calculate the pressure distribution in the x-y coordinates by analyzing the determined light transmission ratio.
  • x-y coordinates can be made by arranging the optical fibers orthogonally so that mathematically modeling can be made of which pressure acts on which part and which pressure acts on a certain surface.
  • the display module may further include a display module indicating the calculated x-y coordinate pressure distribution.
  • first and the second optical fiber is a base which is disposed to cross each other; preferably further includes.
  • the base may be manufactured in the form of a cushion, a mattress, or the like, and thus may be used in various applications to which the present system is applied.
  • control unit after determining and averaging the pressure distribution in real time, it is preferable to determine the pressure balancing from the center of the base.
  • the user can determine the balancing (uniformity) of the pressure or pressure distribution applied to a predetermined surface.
  • the base is preferably installed on any one of a cushion, a mattress, a shoe insole, a pillow, a chair seat, a bed, and a yaw.
  • the pressure balancing can be determined, so that posture correction, sleep state, and the like can be easily understood.
  • the shoe insole it is possible to determine the balancing of the left and right feet when walking, and when applied to pillows, beds or yaw can determine the user's sleeping state or sleeping posture. The sitting posture can be grasped.
  • the base is made in the form of a patch that can be attached to a part of the body, the counter for counting the rate of change of the pressure; further includes a.
  • the pressure detection system it is possible to easily determine the pressure and pressure distribution applied to a predetermined surface by judging each light transmission ratio in the optical fibers that cross each other, and by using an optical fiber having a low cost Not only can the manufacturing cost be greatly reduced, but the burden on after-care, such as replacing it in case of failure or breakage, can be reduced.
  • optical fibers By arranging the optical fibers to be orthogonal to each other, it can be x-y coordinated so that mathematically modeling can be made on which part of the pressure acts on which surface and the pressure acts on which part.
  • the user can easily grasp the pressure or the pressure distribution is easily applied.
  • the user can determine the balancing (uniformity) of the pressure or pressure distribution applied to a certain surface, so that the user can determine the balancing of the pressure when sitting on the cushion or lying on the matrix, posture correction, Sleep status can be easily understood.
  • the shoe insole it is possible to determine the balancing of the left and right feet when walking, and when applied to pillows, beds or yaw can determine the user's sleeping state or sleeping posture.
  • the sitting posture can be grasped.
  • the conventional optical fiber is only a technology for preventing the leakage of light to the outside as much as possible to transmit 100% of the light through the inner (core) of the optical fiber as a transmission path from one end to the other end of the optical fiber, but intentionally optical fiber Forming a light leakage portion that can selectively leak light along the longitudinal direction of, it is possible to detect the degree of bending of the optical fiber by determining the rate of light transmission from one end to the other end of the optical fiber, that is, the light transmission rate. In other words, when the optical fiber is maintained in a straight state, the light transmission rate is close to 100% from one end to the other end of the optical fiber.
  • the light leakage portion is expanded or enlarged according to the degree of the optical fiber, and light leaks to the outside. As a result, the light transmission rate is lowered, and finally, by analyzing the light transmission rate, it is possible to determine the bending state of the optical fiber.
  • the optical fiber By determining the degree of bending of the optical fiber, it can be utilized not only in the pressure detection and pressure distribution detection, but also in many applications such as detecting the operating state of the detection object, safety diagnosis of the structure, and medical instruments.
  • the pressure detection or pressure distribution detection principle can also be applied to security systems. For example, if it is configured in the form of a mat or sheet and installed on the floor of a building that requires security, when an unauthorized outsider enters the fiber, the sheet or mat is deformed by the load, and the optical fiber is bent accordingly. As a result, the light transmission rate can be changed and used to call an alarm or a manager.
  • a variety of cameras should be installed in a specific place (for example, a studio) to capture the operation state of the object to be detected or to attach the marker to the body to capture the camera state to determine the operation state.
  • a specific place for example, a studio
  • the expensive equipment installed in the studio cannot be installed and
  • the use of a simple optical fiber, such as the present invention makes it simple to grasp the current state of an operator who is put into operation.
  • the light transmission rate is detected close to 100% in the initial state, that is, in a state of being kept in a straight state, but the light transmission rate is an example when the building or the bridge is bent. For example, if they fall to 80% or 70%, they can be notified of the risk of collapse of the structure in advance or take immediate action.
  • FIG. 1 is a block diagram schematically showing a pressure detection system according to a preferred embodiment of the present invention
  • FIG. 2 and 3 are views for explaining the optical fiber of the pressure detection system shown in FIG.
  • FIG. 4 is a view for explaining the light transmission ratio of the optical fiber shown in FIG.
  • FIG. 5 is a view for explaining a pressure detection system for determining the pressure distribution by determining the light transmission ratio of the optical fiber;
  • 6 to 7b are views for explaining the operation of the pressure detection system
  • FIG. 8 is a view for explaining the action when the pressure detection system shown in Figure 1 is applied to the cushion
  • FIG. 9 is a view for explaining the action when the pressure detection system shown in Figure 1 is applied to the patch,
  • 10A through 16 are diagrams for describing an apparatus for manufacturing the optical fiber shown in FIG. 2.
  • optical fibers are formed of quartz glass, and many plastic optical fibers having excellent flexibility are also used, and are formed of polymethyl methacrylate or polycarbonate resin. Such plastic optical fibers are widely used because they are less performant than glass optical fibers and are easy to handle and have excellent flexibility.
  • Such an optical fiber is a fiber-shaped waveguide for transmitting light, and a medium having a high refractive index is centered and a periphery is covered with a medium having a low refractive index.
  • the core part of the core and the cladding part surrounding it have a double cylindrical shape, and a synthetic resin coating is sometimes applied to protect it from impact.
  • the transmission of the light by the optical fiber uses total reflection, and when the angle at which the light is incident at the interface between two transparent materials having different refractive indices is met, the complete reflection of light occurs.
  • the clad acts as a mirror, reflecting light, and the reflected light passes through the core and back to the clad and is reflected.
  • the clad acts as a mirror, reflecting light, and the reflected light passes through the core and back to the clad and is reflected.
  • light is transmitted through the optical fiber. That is, only reflection occurs at the interface between the core and the cladding, no refraction occurs, and thus no light is emitted and the other end of the optical fiber is reached.
  • the optical fiber according to a preferred embodiment of the present invention may correspond to a plastic optical fiber, but not limited thereto, and may be a glass optical fiber, and the optical fiber will be described as a concept including all of them.
  • FIG. 1 is a block diagram of a pressure detection system according to a preferred embodiment of the present invention
  • Figures 2 and 3 are views for explaining the optical fiber of the pressure detection system shown in FIG.
  • the pressure detection system 100 includes a first optical fiber 120, a second optical fiber 130, an optical signal transmission module 140, and an optical signal receiving module. 150 and the controller 110.
  • the first and second optical fibers 120 and 130 are cladding to surround the core parts 123 and 133 and the core parts 123 and 133 which form a path through which light is transmitted, so that light does not leak to the outside.
  • the unit 121 and 131 are included.
  • the cladding parts 121 and 131 are formed of a medium having a lower refractive index than the core parts 123 and 133 so that light transmitted to the core parts 123 and 133 does not leak to the outside.
  • the light leakage portions 125 and 135 are formed by cutting 121 and 131.
  • the optical leakage parts 125 and 135 have opposite amounts of light leakage when the optical fibers 120 and 130 are kept in a straight line, but when the optical fibers 120 and 130 are bent by external pressure. The incision is then expanded or enlarged accordingly so that the light leaks out.
  • the light leakage parts 125 and 135 are artificially formed to selectively leak the light to the outside, so that the amount of light leaking to the outside increases proportionally according to the degree of bending of the optical fiber, and thus is finally transmitted through the optical fiber. It is possible to determine the variable amount of the optical signal, that is, the light transmission rate (LTR), in which the amount of received light is inversely proportional.
  • LTR light transmission rate
  • the depth of cut of the light leakage parts 125 and 135 formed by being cut into the cladding parts 121 and 131 is such that light may leak when the cut surface is enlarged or expanded. It is formed deeper than the thickness of the cladding portions 121 and 131.
  • the cladding thickness of the optical fiber having a diameter of 1 mm is 0.01 mm, which corresponds to 1% of the diameter of the optical fiber, and if the depth of cut is deep, the durability of the optical fiber may be degraded and cut. Therefore, it is preferable not to exceed at least 10% of the optical fiber diameter.
  • the light leakage parts 125 and 135 may be formed in plural along the longitudinal direction of the optical fiber 120 and 130, and in the case where a plurality of light leakage parts 125 and 135 are formed, the separation distance between the light leakage parts 125 and 135 is formed. If the uniformly formed to arrange so as to cross the first optical fiber 120 and the second optical fiber 130, it is preferable to be able to easily calculate the coordinate value.
  • the optical signal transmission module 140 generates and outputs an optical signal.
  • the optical signal transmission module 140 may include an optical signal generator and an optical signal transmitter.
  • the optical signal transmission module 140 may be implemented as an LED for generating an optical signal of a specific wavelength.
  • the scope of the present invention is not limited thereto.
  • the optical signal receiving module 150 receives an optical signal output from the optical signal transmitting module 140 from the optical fiber 120 and 130, converts the optical signal into an electrical signal, and outputs the electrical signal.
  • the optical signal receiving module 150 may be implemented as a photodiode driven in response to the received optical signal. However, the scope of the present invention is not limited thereto.
  • the optical signal receiving module 150 has an amplifier and an analog-to-digital converter, and the amplifier amplifies and amplifies the signal output from the photodiode, and the analog-to-digital converter converts the output signal of the amplifier into a digital signal.
  • the controller 110 analyzes the digital signal output from the optical signal receiving module 150 to determine the light transmission ratio, and analyzes the determined light transmission ratio to detect the degree of bending of the optical fiber, the magnitude of the pressure, and the pressure distribution.
  • it is preferable to sample the digital signal at a predetermined sampling rate.
  • processing may be included for converting a digital signal into a signal of a predetermined communication standard type. This is only one example and the scope of the present invention is not limited thereto.
  • the optical signal output module 150 for receiving an optical signal through the optical fiber 120, 130 is the optical signal output from the optical signal transmission module 140 for outputting the optical signal ) Is received.
  • the light transmission rate (LTR: Light Transmission Rate (LTR) is in the state in which the optical fiber 120, 130 is kept in a straight line, the amount of light leakage to the outside or insignificant, the optical fiber 120, 130 is external When bent under pressure, light leaks to the outside, resulting in a drop in light transmission.
  • the light transmission ratio is high (meaning less light leaks to the outside), and the optical leakage portion 125 is bent as the optical fibers 120 and 130 are bent.
  • the cutout of the 135 is enlarged, a lot of light leaks to the outside, resulting in a low light transmission ratio.
  • control unit 110 controls the optical signal transmission module 140 and the optical signal receiving module 150 to output and receive the optical signal, and to receive the optical signal received by the optical signal receiving module 150.
  • the control unit 110 controls the optical signal transmission module 140 and the optical signal receiving module 150 to output and receive the optical signal, and to receive the optical signal received by the optical signal receiving module 150.
  • the optical fiber 120, 130, the optical signal transmission module 140, and the optical signal reception module 150 are connected by the connecting parts 127 and 137 (see FIG. 5), and the optical signal transmission module 140 and
  • the optical fiber 120, 130 is preferably implemented with a hard material that can protect the outside.
  • the pressure detection system 100 is based on a variable amount of optical signals transmitted by the optical fibers 120 and 130 according to the above-described mechanism, that is, based on a light transmission rate.
  • the pressure or pressure distribution can be determined by the structure in which the first optical fiber 120 and the second optical fiber 130 are intersected.
  • FIG. 5 shows a pressure detection system according to a preferred embodiment of the present invention.
  • a method of detecting pressure will be described with reference to FIG.
  • the plurality of first optical fibers 120 are disposed at regular intervals in the x-axis direction, and the plurality of second optical fibers 130 are disposed crossing the first optical fibers 120 at regular intervals in the y-axis direction.
  • An optical signal transmission module 140 is disposed at one end of the first optical fiber 120 and the second optical fiber 130, and an optical signal receiving module 150 is disposed at the other end. These, the optical signal transmission module 140 and the optical signal receiving module 150 are shown separately for ease of understanding in the drawings, but may be different.
  • the light transmission rate is 100%.
  • the light transmission rate is 85% due to the bent state. It can be seen that. Therefore, the light transmission ratio is variable according to the degree of warpage, and the pressure can be determined by analyzing the light transmission ratio.
  • the light transmission ratio may be easily coordinated and calculated in the form of x-y coordinates. It demonstrates with reference to FIG. 6, FIG. 7A, and FIG. 7B.
  • the first optical fiber 120 and the second optical fiber 130 are not bent, that is, an ideal situation in which no external pressure is applied is assumed, in all the optical signal receiving modules 150.
  • the light transmission rate of the received optical signal is 100%.
  • P1 and P2 have a 100% light transmission ratio to the x-axis and a 100% light transmission ratio to the y-axis.
  • P1 is The light transmission ratio on the x axis is 87%
  • the light transmission ratio on the y axis is 97%
  • P2 has a light transmission ratio on the x axis of 70% and a light transmission ratio on the y axis of 70%.
  • the coordinate of P1 is changed from (100, 100) to (87, 97) and the coordinate of P2 is changed from (100, 100) to (70, 70). It can be determined that the pressure is greater than the pressure applied to P1.
  • the controller 110 analyzes the optical signal received by the optical signal receiving module 150 to calculate the light transmission rate, and determines the pressure distribution in the form of x-y coordinates.
  • the number of the first optical fiber 120 and the second optical fiber 130 arranged in the y-axis are not limited to those shown in the above, and it is necessary to detect the pressure distribution more precisely. If there are more fibers 120, 130 can be arranged.
  • control unit 110 further includes a display module 160 for displaying the pressure distribution calculated in the form of x-y coordinates so that it can be easily identified.
  • the first and second optical fibers 120 and 130 may be disposed to be perpendicular to the base, and the shape of the base may be a cushion, a mattress, a pillow, a chair seat, a chair back, a bed, a yaw, or the like.
  • the controller 110 may determine the balancing of the pressure distribution by averaging the calculated pressure distribution in units of a predetermined time.
  • FIG. 8 illustrates an example applied to a cushion, in which the controller 110 averages the distribution of pressure applied to the cushion and displays the average on the display module 160.
  • the pressure distribution is asymmetrical, the user is judged to be seated in the correct posture and left, If the pressure distribution is asymmetrical, it is judged that the spine is not straightened or is inclined to one side.
  • the pressure detection system according to the present invention can be applied to the medical field.
  • the base is in the form of a patch when the heart or near the wrist can be easily determined the heart rate or pulse rate.
  • a counter 170 for counting the change in pressure distribution.
  • Fig. 9 shows a patch-type pressure detection system, in which a lot of pressure is applied near the heart and a lot of pressure is applied near the artery near the wrist. do.
  • the controller 110 determines this and counts by the counter 170 to determine the heart rate and the pulse rate.
  • the wireless communication network may be a Zigbee communication network, a Bluetooth communication network, a WiBro communication network, a wireless Internet network, etc., but the scope of the present invention is not limited thereto.
  • the fiber can be applied to a security system using the pressure detection or pressure distribution detection principle.
  • the fiber is cross-arranged to form a mat or sheet and installed on the floor of a building that requires security, when an unauthorized outsider enters the fiber, the fiber is transformed into a sheet or mat downward by the load. As a result, the optical fiber is bent and the light transmission rate is changed, so that the alarm sound or the manager can be called.
  • the optical fiber is installed in clothing such as a joint part or muscle part of a human body
  • the optical transmission rate is changed according to the bending of the fiber accordingly. Judging the changed amount, it is possible to determine how much the joint is bent and how much the muscle is swelled.
  • various cameras should be installed in a specific place (for example, a studio) to capture the operation state of the object to be detected or to attach the marker to the body to capture the operation state to determine the operation state.
  • a specific place for example, a studio
  • the use of a simple optical fiber, such as the present invention makes it simple to grasp the current state of an operator who is put into operation.
  • the light transmission rate is detected close to 100% in the initial state, that is, in a state of being kept in a straight state, but the light transmission rate is an example when the building or the bridge is bent. For example, if they fall to 80% or 70%, they can be notified of the risk of collapse of the structure in advance or take immediate action.
  • the pressure distribution detection method according to an embodiment of the present invention can be implemented as a computer-readable code on a computer-readable recording medium
  • the pressure detection method according to an embodiment of the present invention is computer-readable It can be implemented by executing a computer program for executing the pressure detection method stored in the recording medium.
  • the computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is authored.
  • computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like.
  • the computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.
  • functional programs, codes, and code segments for implementing a pressure detection method according to an embodiment of the present invention can be easily inferred by programmers in the art to which the present invention belongs.
  • 10A to 19 are diagrams for describing an apparatus for manufacturing an optical fiber in which the light leakage parts 125 and 135 are formed.
  • FIGS. 10A to 11 are diagrams illustrating an optical fiber manufacturing apparatus according to an embodiment of the present invention.
  • the optical fiber manufacturing apparatus 200 includes a support unit 220, a cutter unit 235, an optical fiber rotating unit 250, a feeding unit 270, and an apparatus control unit 210.
  • the support unit 220 is to support the optical fiber is not formed, the light leakage (125, 135) is not seated, is formed slightly larger than the diameter of the optical fiber is a support space 221 is formed so that the optical fiber can be stably supported. .
  • the cutter part 235 cuts the cladding parts 121 and 131 of the optical fiber 120 and 130 to form the light leakage parts 125 and 135.
  • the cutter part 235 is positioned above the support part 220 to support the support part 220.
  • the optical fiber is seated on the support part 220, the optical fiber is seated on the support part 220 and then moved to the optical fiber 120 and 130 side after the optical fiber is seated on the support part 220.
  • the cladding parts 121 and 131 of the 120 and 130 are cut to form the light leakage parts 125 and 135.
  • the cutter unit 235 is driven in the vertical direction by the cutter driver 230, the cutter driver 230 is moved to the optical fiber 120, 130 side according to the cut depth of the light leakage (125, 135).
  • the distance is controlled by the device control unit 210.
  • the cutter unit 235 further includes a heating unit 270 so as to dissolve at a high temperature when cutting the cladding unit 121, 131 of the optical fiber 120, 130 by heating to a predetermined temperature. desirable.
  • the heat generating unit 270 is preferably to maintain the temperature of the cutter unit 235 or more.
  • the optical fiber rotating unit 250 rotates the optical fibers 120 and 130 to form an incision along the outer circumferential surface after the cutter unit 235 is initially embedded in the optical fiber, and the cutter unit 235 is connected to the apparatus control unit 210. As the optical fiber 120, 130 is moved to the side of the optical fiber 120, 130 and embedded in a predetermined depth, the optical leakage parts 125 and 135 are formed while being cut along the outer circumferential surface.
  • the optical leakage portions 125 and 135 are formed by being cut 360 ° along the outer circumferential surface of the optical fiber, the optical leakage portions 125 and 135 which are cut while the optical fiber is bent are enlarged even when the external pressure is applied in any direction. Can be expanded to allow light to leak.
  • the light leakage unit 125, 135 may be formed only in a certain portion of the optical fiber, in this case, it is necessary to set the light leakage unit 125, 135 to be located in the opposite direction to the direction in which pressure is applied. There is. That is, the light leakage parts 125 and 135 should be formed in the opposite direction to which pressure is applied in order to extend the cut surface while the optical fibers 120 and 130 are bent.
  • a feeding unit 290 for transferring the optical fiber 120, 130 in its longitudinal direction.
  • This feeding part 290 is not only for pulling out the optical fiber 120, 130, the optical leakage portion 125, 135 is formed from the support portion 220 and to supply another new optical fiber 120, 130, As shown in FIG. 14A, in the case where a plurality of light leakage parts 125 and 135 are to be formed in the optical fiber 120 and 130, one light leakage part 125 and 135 is formed and subsequent light leakage parts 125 are formed.
  • the optical fibers 120 and 130 are transported by a predetermined distance, and then the cutter unit 235 is moved downward, and then the optical fibers 120 and 130 are rotated.
  • the light leakage parts 125 and 135 are formed to form a plurality of light leakage parts 125 and 135.
  • the feeding unit 290 simply functions to transfer or supply the optical fiber 120, 130 to the support unit 220.
  • FIGS. 12 and 13 are views illustrating an optical fiber manufacturing apparatus according to another preferred embodiment of the present invention.
  • the optical leakage parts 125 and 135 are formed of the optical fiber.
  • the optical fiber is rotated to form an incision along the outer circumferential surface, but the optical leakage parts 125 and 135 are formed by rotating the cutter 335.
  • the optical fiber manufacturing apparatus 300 includes a support part 320, a cutter part 335, a cutter rotating part 350, a feeding part 390, and an apparatus control part 310.
  • the support 320 is to support the optical fiber that is not formed with the light leakage (125, 135) is seated, is formed slightly larger than the diameter of the optical fiber is a support space 321 is formed so that the optical fiber can be stably supported. .
  • the cutter part 335 cuts the cladding parts 121 and 131 of the optical fiber 120 and 130 to form the light leakage parts 125 and 135, and is positioned above the support part 320 to support the support part 320.
  • the optical fiber 120, 130 waits above the support 320, and then the optical fiber is seated on the support 320, and then the optical fiber 120, 130
  • the light leakage portions 125 and 135 are formed by cutting the cladding portions 121 and 131 of the optical fibers 120 and 130.
  • the cutter unit 335 is driven in the vertical direction by the cutter driver 330, the cutter driver 330 is moved toward the optical fiber 120, 130 side according to the depth of cut of the light leakage (125, 135).
  • the distance controlled is controlled by the device control unit 310.
  • the cutter part 335 is the optical fiber 120 by the cutter rotating part 330 which rotates the cutter part 335 embedded in the optical fiber 120 and 130 at an initial cutting depth under the control of the apparatus control unit 310.
  • the optical leakage portions 125 and 135 are formed while the optical fiber is cut while rotating 130 as the rotation center.
  • the cutter unit 335 further generates heat at a predetermined temperature so that the heat dissipation unit 370 may be melted at a high temperature when cutting the cladding units 121 and 131 of the optical fiber 120 and 130. desirable.
  • the heating unit 370 is preferably to maintain the temperature of the cutter unit 335 or more.
  • the optical leakage portions 125 and 135 are formed by being cut 360 ° along the outer circumferential surface of the optical fiber, the optical leakage portions 125 and 135 which are cut while the optical fiber is bent are enlarged even when the external pressure is applied in any direction. Can be expanded to allow light to leak.
  • the light leakage unit 125, 135 may be formed only in a certain portion of the optical fiber, in this case, it is necessary to set the light leakage unit 125, 135 to be located in the opposite direction to the direction in which pressure is applied. There is. That is, the light leakage parts 125 and 135 should be formed in the opposite direction to which pressure is applied in order to extend the cut surface while the optical fibers 120 and 130 are bent.
  • the present invention further includes a feeding unit 390 for transferring the optical fiber 120, 130 in its longitudinal direction.
  • the feeding unit 390 is not only for pulling out the optical fibers 120 and 130 having completed the light leakage parts 125 and 135 from the support part 320 and supplying another new optical fiber 120 and 130, As shown in FIG. 14A, in the case where a plurality of light leakage parts 125 and 135 are to be formed in the optical fiber 120 and 130, one light leakage part 125 and 135 is formed and subsequent light leakage parts 125 are formed.
  • the portions 125 and 135 are formed to form the plurality of light leakage portions 125 and 135.
  • the feeding unit 390 transports the optical fiber 120, 130 in order to form a plurality of light leakage (125, 135) by using one cutter unit 335 as described above As illustrated in FIG. 14B, a plurality of light leakage parts 125 and 135 may be simultaneously formed using the plurality of cutter parts 335.
  • the feeding unit 390 simply functions to transfer or supply the optical fibers 120 and 130 to the support 320.
  • the optical leakage parts 125 and 135 are formed by rotating the optical fibers 120 and 130, or the optical leakage parts 125 and 135 are formed by rotating the cutter parts 235 and 335.
  • a configuration for rotating the optical fiber 120 or 130 or the cutter unit 235 should be separately provided.
  • the cutter unit 235 is referred to as the optical fiber 120 or 130.
  • a pair is provided, and the shape of the cutter portion 235 is formed in an arc shape to form the light leakage portions 125 and 135 in the optical fibers 120 and 130.
  • the diameter of the circular arc shape of the cutter unit 235 is smaller than the diameter of the optical fiber 120, 130, it is preferable that the diameter of the circular cross-section of the light leakage (125, 135). That is, the cladding parts 121 and 131 so that light may leak when the cutting depth of the light leakage parts 125 and 135 cut and formed on the cladding parts 121 and 131 is enlarged or expanded. It has a diameter that can be formed deeper than the thickness of.
  • the cutting depth of the light leakage parts 125 and 135 has a diameter that can be formed to a depth of 1% to 10% of the diameter of the optical fiber.
  • the cladding thickness of the optical fiber having a diameter of 1 mm is 0.01 mm, which corresponds to 1% of the diameter of the optical fiber, and if the depth of cut is deep, the durability of the optical fiber may be degraded and cut.
  • a pair of cutter portions 235 are provided in the vertical direction of the optical fibers 120 and 130, and the optical fibers 120 and 130 are upwardly supported by a support (not shown).
  • the cutter portion 235 of the optical fiber 120, 130 while cutting the cladding portion 121, 131 of the optical fiber 120, 130 as the cutter portion 235 is moved downwards and moved upward. ) Is formed.
  • the cladding parts 121 and 131 of the optical fibers 120 and 130 may be dissipated at a high temperature, so that the heating part may be further included. At this time, it is preferable that the heat generating part maintains the temperature of the cutter part 235 or more.
  • FIGS. 18 and 19 are views illustrating an optical fiber manufacturing apparatus according to still another preferred embodiment of the present invention.
  • the optical fiber manufacturing apparatus 400 includes a support part 420, a laser cutting part 435, an optical fiber rotating part 450, a feeding part 490, and an apparatus controller 410.
  • the support part 420 is to support the optical fiber that is not formed in the light leakage portion (125, 135) is seated, is formed slightly larger than the diameter of the optical fiber is a support space 421 is formed so that the optical fiber can be stably supported. .
  • the laser cutting part 435 is positioned above the support part 420 to emit laser light through the optical fibers 120 and 130 to cut the cladding parts 121 and 131 of the optical fibers 120 and 130 to expose the light leakage parts. And form 125 and 135.
  • the laser cutting unit 435 uses a laser as a high-density heat source, it is heated and processed at high speed, so that the heat deformation layer is narrow and very hard or fragile. It is preferably used to form portions 125 and 135.
  • the device controller 410 adjusts the distance the laser light is irradiated according to the incision depth of the light leakage unit 125, 135 to drive the laser driver 430 to irradiate the laser light,
  • the incision depth of the 125 and 135 can be adjusted.
  • Adjusting the cutting depth of the optical fiber (120, 130), that is, the irradiation distance of the laser light is preferably controllable controllable according to the diameter of the optical fiber or the nature of the optical fiber.
  • the optical fiber rotating unit 450 rotates the optical fibers 120 and 130 to form an incision along the outer circumferential surface after the laser light is irradiated by the laser cutting unit 435, so that the laser light has a constant irradiation distance and the optical fiber 120 After the initial irradiation to the (130) side, the optical fiber 120, 130 is rotated and cut along the outer circumferential surface to form the light leakage (125, 135).
  • the optical leakage portions 125 and 135 are formed by being cut 360 ° along the outer circumferential surface of the optical fiber, the optical leakage portions 125 and 135 which are cut while the optical fiber is bent are enlarged even when the external pressure is applied in any direction. Can be expanded to allow light to leak.
  • the light leakage unit 125, 135 may be formed only in a certain portion of the optical fiber, in this case, it is necessary to set the light leakage unit 125, 135 to be located in the opposite direction to the direction in which pressure is applied. There is. That is, the light leakage parts 125 and 135 should be formed in the opposite direction to which pressure is applied in order to extend the cut surface while the optical fibers 120 and 130 are bent.
  • the present invention further includes a feeding unit 490 for transferring the optical fiber 120, 130 in its longitudinal direction.
  • the feeding part 490 is not only for pulling out the optical fibers 120 and 130 having completed the light leakage parts 125 and 135 from the support part 420 and supplying another new optical fiber 420, but also in FIG. 14A. As shown, when a plurality of light leakage parts 125 and 135 are to be formed in the optical fiber 120 and 130, one light leakage part 125 and 135 is formed and subsequent light leakage parts 125 and 135 are formed.
  • the optical fiber 120, 130 is transferred to a predetermined distance to form a) through the above procedure, that is, irradiated with laser light again, the optical fiber 120, 130 is rotated to rotate the light leakage (125, 135) ) To form a plurality of light leakage parts 125 and 135.
  • the feeding unit 490 transfers the optical fiber 120, 130 in order to form a plurality of light leakage (125, 135) by using a single laser cut portion 435 as described above As illustrated in FIG. 14B, a plurality of light leakage parts 125 and 135 may be simultaneously formed using the plurality of laser cutting parts 435. At this time, the feeding unit 490 simply functions to transfer or supply the optical fibers 120 and 130 to the support unit 420.
  • optical leakage parts 125 and 135 are optical fibers.
  • the laser cutout 535 is rotated to form the light leakage portions 125 and 135.
  • the optical fiber manufacturing apparatus 500 includes a support part 520, a laser cutting part 535, a laser rotating part 550, a feeding part 590, and an apparatus controller 510.
  • the support part 520 is to support the optical fiber that is not formed with the light leakage parts 125, 135 is seated, is formed slightly larger than the diameter of the optical fiber is formed so that the support space can be stably supported.
  • the laser cutting part 535 is positioned above the support part 520 to emit laser light through the optical fibers 120 and 130 to cut the cladding parts 121 and 131 of the optical fibers 120 and 130 to expose the light leakage parts. And form 125 and 135.
  • the laser cut part 535 uses a laser as a high-density heat source, it is heated and processed at high speed, so that the heat deformation layer is narrow and very hard or easily breakable, so that it is easy to process and finely processed. It is preferably used to form portions 125 and 135.
  • the device controller 510 adjusts the distance irradiated with the laser light to be irradiated according to the incision depth of the light leakage unit 125, 135 to drive the laser driver 530 to irradiate the laser light, thereby the light leakage unit
  • the incision depth of the 125 and 135 can be adjusted.
  • the depth of cut control of the optical fibers 120 and 130 that is, the irradiation distance of the laser light can be controlled to be adjustable according to the diameter of the optical fiber or the properties of the optical fiber.
  • the laser rotating unit 550 rotates the laser cutting unit 535 for irradiating the laser light to the initial cutting depth under the control of the device controller 510 by rotating the optical fiber 120 and 130 as the center of rotation, thereby cutting the optical fiber while cutting the optical fiber.
  • the portions 125 and 135 are formed.
  • the optical leakage portions 125 and 135 are formed by being cut 360 ° along the outer circumferential surface of the optical fiber, the optical leakage portions 125 and 135 which are cut while the optical fiber is bent are enlarged even when the external pressure is applied in any direction. Can be expanded to allow light to leak.
  • the light leakage unit 125, 135 may be formed only in a certain portion of the optical fiber, in this case, it is necessary to set the light leakage unit 125, 135 to be located in the opposite direction to the direction in which pressure is applied. There is. That is, the light leakage parts 125 and 135 should be formed in the opposite direction to which pressure is applied in order to extend the cut surface while the optical fibers 120 and 130 are bent.
  • the present invention further includes a feeding unit 590 for transferring the optical fiber 120, 130 in its longitudinal direction.
  • the feeding unit 590 is not only for pulling out the optical fiber 120, 130, the optical leakage unit 125, 135 is formed from the support unit 520 and to supply another new optical fiber 120, 130, As shown in FIG. 14A, in the case where a plurality of light leakage parts 125 and 135 are to be formed in the optical fiber 120 and 130, one light leakage part 125 and 135 is formed and subsequent light leakage parts 125 are formed.
  • the optical fiber 120, 130 is transferred to a predetermined distance to form the 135, the above procedure, that is, the laser cutting unit 535 is driven to irradiate the laser light to the optical leakage unit 125 (135) ) To form a plurality of light leakage parts 125 and 135.
  • the feeding unit 590 transfers the optical fiber 120, 130 in order to form a plurality of light leakage (125, 135) by using a single laser cut portion 535 as described above As illustrated in FIG. 14B, a plurality of light leakage parts 125 and 135 may be simultaneously formed using the plurality of laser cutting parts 535.
  • the feeding unit 590 simply functions to transfer or supply the optical fibers 120 and 130 to the support unit 520.
  • optical leakage unit 140 optical signal transmission module
  • optical signal receiving module 160 display
  • control unit 210, 310, 410, 510 control unit

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un système de détection de pression qui, selon un mode de réalisation préféré de l'invention, comprend : une pluralité de premières fibres optiques disposées à un intervalle constant les unes par rapport aux autres et ayant au moins une unité de passage de lumière formée dans celles-ci ; une pluralité de deuxièmes fibres optiques disposées à un intervalle constant les unes par rapport aux autres et prévues pour intersecter les premières fibres optiques et ayant au moins une unité de passage de lumière formée dans celles-ci ; un module de transmission de signaux optiques pour générer un signal optique et fournir en sortie le signal optique à l'intérieur des premières et deuxièmes fibres optiques par le biais d'une partie d'extrémité de chaque fibre de celui-ci ; un module de réception de signal optique pour recevoir le signal optique fourni en sortie par les premières et deuxièmes fibres optiques, convertir le signal optique en un signal électrique et fournir en sortie le signal électrique ; et une unité de commande pour analyser le signal optique fourni en sortie par le module de réception de signal optique et déterminer les taux de transmission de la lumière des premières et deuxièmes fibres optiques, l'unité de passage de la lumière étant coupée et formée dans la direction intersectant la direction longitudinale des premières et deuxièmes fibres optiques, et la quantité de passage de lumière provenant des fibres optiques variant en fonction du degré de courbure des premières et deuxièmes fibres optiques. Par conséquent, le système selon la présente invention est apte à déterminer les taux de transmission de la lumière de fibres optiques respectives s'intersectant les unes les autres pour établir aisément la pression et la répartition de pression appliquées sur un certain plan. De plus, en raison de l'utilisation de fibres optiques ayant un coût unitaire bas, la présente invention a pour effet de réduire considérablement les coûts de fabrication ainsi que de réduire la charge de travail requise pour la gestion de suivi comme lors d'un remplacement des fibres optiques en cas de défaillance ou de rupture.
PCT/KR2013/010800 2013-03-21 2013-11-26 Système de détection de pression Ceased WO2014148720A1 (fr)

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WO2017190085A1 (fr) * 2016-04-29 2017-11-02 Fitbit, Inc. Système de surveillance du sommeil à fonctionnalité d'alarme optionnelle
US10111615B2 (en) 2017-03-11 2018-10-30 Fitbit, Inc. Sleep scoring based on physiological information
EP3376170B1 (fr) * 2017-03-15 2021-06-16 Institut für Holztechnologie Dresden gemeinnützige GmbH Système capteur destiné à la surveillance de force de pression et de changement d'humidité sur un support textile et procédé d'application dudit système capteur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06307953A (ja) * 1993-04-27 1994-11-04 Hitachi Ltd 物理量検出装置
KR20010021891A (ko) * 1997-07-16 2001-03-15 추후제출 압력 센서
JP2005517920A (ja) * 2002-02-11 2005-06-16 レオニ アクチエンゲゼルシャフト 光導波路を備えた圧力センサと圧力検知方法
JP2007040737A (ja) * 2005-08-01 2007-02-15 Tama Tlo Kk バンパーセンサ
JP2009229311A (ja) * 2008-03-24 2009-10-08 Fukui Prefecture 圧力検知用光ファイバケーブル

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2152601C1 (ru) * 1998-06-16 2000-07-10 Научный центр волоконной оптики при Институте общей физики РАН Волоконно-оптический датчик давления (его варианты) и способ его изготовления
JP2001282141A (ja) 2000-03-31 2001-10-12 Sony Corp 光子操作装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06307953A (ja) * 1993-04-27 1994-11-04 Hitachi Ltd 物理量検出装置
KR20010021891A (ko) * 1997-07-16 2001-03-15 추후제출 압력 센서
JP2005517920A (ja) * 2002-02-11 2005-06-16 レオニ アクチエンゲゼルシャフト 光導波路を備えた圧力センサと圧力検知方法
JP2007040737A (ja) * 2005-08-01 2007-02-15 Tama Tlo Kk バンパーセンサ
JP2009229311A (ja) * 2008-03-24 2009-10-08 Fukui Prefecture 圧力検知用光ファイバケーブル

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