JPH0823490B2 - Wall thickness measuring device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for measuring the wall thickness of a bottom plate of a tank or the like.

[Conventional technology]

One of the maintenance tasks for tanks that store crude oil and products obtained from this crude oil is the measurement of the wall thickness of the tank bottom plate.

In this inspection, the wall thickness of about 10,000 measuring points may be measured in a short period of time (for example, 4 to 5 days). Therefore, it is necessary to record the measurement data of these measuring points on the recording paper by hand. It takes a lot of time to do.

Therefore, recently, there has been proposed a wall thickness measuring device having a function of sequentially storing measurement data at each measurement point together with data indicating the position of the point and printing out the stored content.

[Problems to be solved by the invention]

By the way, when there is an abnormal difference between the wall thickness measurement result at the current measurement point and the wall thickness measurement result at the immediately previous measurement point, it is considered that there was some mistake in the measurement operation at the current measurement point.

If the measurement error is not noticed and the measurement is continued, the wall thickness at the measurement point is not normally measured, which reduces the reliability of the measurement result.

The conventional thickness measuring device described above does not have a function of allowing the measurer to recognize the abnormality of the thickness measurement result at the current measurement point, which may cause the above-mentioned inconvenience.

In view of such a situation, an object of the present invention is to display both the wall thickness measurement result at the current measurement point and the wall thickness measurement result at the immediately previous measurement point, and make it possible to compare the both measurement results. To provide.

[Means for solving problems]

The present invention is a wall thickness measuring device for sequentially measuring wall thicknesses of measurement points set at a plurality of points of a measurement object and recording the same in a memory, the first, second and third display elements and recording instructions. Switch and the address of the current measurement point are the first
On the display element, the thickness measurement result at the current measurement point is displayed on the second display element, and the address of the next measurement point is displayed on the first display element based on the operation of the switch. It is characterized by further comprising a processor for displaying the thickness measurement result displayed on the second display element on the third display element and recording the thickness measurement result in the memory.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the wall thickness measuring device according to the present invention.

In this embodiment, a wall thickness measuring device 2 for measuring the wall thickness based on the output of the wall thickness detecting ultrasonic probe 1, and a data recorder for recording the wall thickness measuring data obtained by the wall thickness measuring device 2. 3 and a data processing unit 4 connected to this recorder 3.

The data recorder 3 includes display elements 31, 33 and 33, an input key 34, and a numeric keypad 35, and a memory 36 for storing wall thickness measurement data, the memory 36 and the display elements 31, 3.
It has a built-in microprocessor 37 which controls 2 and 33 based on the operation of the keys 34 and 35.

The data processing unit 4 includes a microprocessor 41 such as a CPU that processes the recorded data of the data recorder 3, a printer 42 that prints the processing result of the microprocessor 41, and a display (for example, CRT) 43 that displays the processing result. have.

The wall thickness measuring device 2 and the data recording device 3 are used at a measurement site, and the data processing unit 3 is installed at a place apart from the measurement site. When measuring the wall thickness, the data recorder 3 is used separately from the data processing unit 4.

FIG. 2 shows a bottom plate 5 of a tank which is an example of an object to be measured. The bottom plate 5 includes an annular portion 51 located below the side wall of the tank, and an inner portion 52 of the bottom plate surrounded by the annular portion 51. It is composed of.

In the figure, the measurement point at the inner part 52 of the bottom plate is shown.
P _1-1 , P _1-2 , ..., P _2-1 , P _2-2 , ... _Are indicated by dots, and the pitches of these measurement points are set to 1 m, for example.

The annular part 51 is an inner part of the bottom plate in consideration of strength and the like.
The wall thickness is set to be larger than the wall thickness of 52 (for example, standard wall thickness of 6 m / m) (for example, standard wall thickness of 9 m / m), and a stricter wall thickness inspection is required than the inner portion 52 of the bottom plate. Therefore, as shown in FIG. 3 in an enlarged manner, one annular plate 51a that constitutes the annular portion 51, the measurement point P '
_1-1 , _P'1-2 , ... are set with a small pitch.

The measurement points of the annular portion 51 are set in a staggered manner as shown in the figure, and the pitch width of each of these measurement points is set to about 100 m / m.

FIG. 4 shows a processing procedure executed on the data recorder 3 side when measuring the wall thickness. In this procedure, the arrangement pattern (the number of rows and the number of columns) of the measurement points is first designated by the operation of the ten keys 35. Then, the start address of the measurement point is designated by operating the ten keys 35 (step 100) (step 101).

Here, the specific contents of steps 100 and 101 will be briefly described by taking the case of measuring the wall thickness of the annular portion 51 as an example.

The measurement points of the 12 annular plates that form the annular portion 51 are, for example, in the lateral direction (row) 60.
A total of 300 points, 5 points in the vertical direction (row), are set.

Now, considering the case where, for example, the plates 51a to 51d among the annular plates 51a to 51l shown in FIG. 2 are measured, in this case, a numerical value indicating the number of the annular plates to be measured by operating the ten keys 35 is used. 04 and the numbers 60 and 05 indicating the number of rows and columns of measurement points are entered in sequence, and then the numeric keypad
A numerical value that specifies the start address from the operation of 35, for example 01-01-
01 is entered. This is the specific content of steps 100 and 101.

When the input operation of step 101 is performed, the processor 37 of the data recorder 3 causes the annular plate shown in FIG.
Numerical 01 showing the 51a numbers, numerical numerical 01 and a column address indicating a row address of the measurement point P _'1-1 shown in FIG. 3 0
1 is displayed on the display element 33 in the form of 01-01-01 as shown in FIG. 1 (step 102).

Here, 'the operation to contact the probe 1 to _1-1 is performed, the point P' the point P, which is the display by the operator thickness measurement data wall thickness measuring device that indicates the thickness of about _1-1 2 is sent to the data recorder 3 (step 103), and at the same time, the measured data is displayed on the display device 31.
Is displayed (step 104).

Then, the operator inputs the data recorder 3
When 34 is pressed (step 105), the processing to record the Memoi 36 the thickness measurement data for _1-1 'this point P as the data indicating the address of _1-1' point P by the processor 37 is executed (step 106), further, the display transition process of displaying the measurement data for the point P _'1-1 currently being displayed on the display device 31 on the display device 32 is performed (step 107).

Next, in the processor 37, it is determined whether or not the measurement address is the final address, that is, the annular plates 51a to 51d which are the measurement ranges.
It is determined whether or not the measurement has been completed for the entire area of (step 108).

At this point in time, the determination result of step 108 is NO, so the processor 37 executes the measurement address advance processing (step 109), and the procedure jumps to step 102. Then, in step 102, the address moved up in step 109 (address for P _1-2 ) is displayed on the display element 33 in a mode of 01-01-02.

After that, the same procedure is repeated, and when the determination in step 108 becomes YES, the annular plate 51a to
The wall thickness measurement for all measurement points of 51d is completed. At this point, the memory 36 of the data recorder 3 has recorded the wall thickness measurement data at each measurement point.

On the other hand, the wall thickness measurement according to the same procedure for the bottom plate inner portion 52 is performed. However, in the bottom plate inner part 52,
Data is recorded as one measurement point without dividing the measurement area like the annular section 51. Therefore, in the designation of the array pattern in step 100, the numerical value 01 indicating one measurement point is input instead of the numerical value 04.

By the way, by the processing of steps 107 and 109, the measurement data of the current measurement point is displayed on the display element 31,
On the other hand, the display element 32 displays the measurement data of the immediately previous measurement point.

Therefore, the measurer can determine whether or not the measurement data at the above-mentioned measurement points are abnormally different by comparing the display contents of the display elements 31 and 32.

If abnormalities in the measurement data at the current measurement point are recognized by comparing the displayed contents, it is determined that there was an error in the measurement operation, and the current measurement is performed without operating the input key (measurement data recording operation). Re-measure the wall thickness of the point.

Then, if the result of the re-measurement is recognized as normal, recording of the measurement data by the operation of the input key is executed, and if the result of the re-measurement is recognized as abnormal, The ultrasonic probe 1 and the like are judged to be abnormal, and the probe 1 and the like are inspected.

As described above, the inner part 52 of the bottom plate or the annular part 51
When the wall thickness measurement is completed, the data recorder 3 is connected to the data processing unit 4.

FIG. 5 shows a processing procedure performed on the data processing unit 4 side. In the data processing unit 4, the specifications of the tank described above and the arrangement pattern of the respective measurement points (the positions of the measurement points in the annular portion 51 and the inner portion 52 of the bottom plate) corresponding to the specifications are registered in advance.

Therefore, the specifications of the tank are first input by operating the keyboard 44, and the arrangement pattern of the measurement points according to the specifications of the tank is designated (step 200). Next, whether the data transmitted from the recorder 3 is for the inner part 52 of the bottom plate or the annular part 51
Is designated by operating the keyboard 44 (step 201).

Now, in step 201, if it is specified that data transfer is to be performed for the inner portion 52 of the bottom plate, in this case, a transfer command for the same data is output from the processor 41 to the data recorder 3 by operating the keyboard 44. As a result, the reading of the data on the inner portion 52 of the bottom plate is started (step 202).

In the processor 41, the position data indicating each of the measurement points P _1-1 , P _1-2 , ... Sequentially transferred from the data recording section 3 and the wall thickness measurement data for those points, and steps 100, 200 Based on the arrangement pattern designated by the above, the process of storing the wall thickness measurement data in the memory 45 in the manner shown in FIG. 6, that is, each measurement point P _1-1 , P _1-2 , shown in FIG. At the addresses of the memory 45 corresponding to the positions (addresses) of ..., the wall thickness measurement data D _1-1 , D at those positions
A process of sorting _1-2 , ... And storing is executed (step 203).

Then, in the next step 204, it is determined whether or not the final data has been read, and if this determination is YES, the memory 45
The stored contents of (1) are printed by the printer 42 (step 205) and, if necessary, displayed on the display 43 (step 206).

As shown in FIG. 7 as an example of the recording result by the printer 42, according to this embodiment, each measurement point P _1-1 , P _1-2 , ...
Since the wall thickness measurement data about those points are recorded at the positions corresponding to the coordinate positions (addresses) of, the distribution of the wall thickness of the inner portion 52 of the bottom plate can be grasped at a glance. Since the recording result of the printer 42 satisfies the so-called inspection report format, the recording paper can be used as it is as the report.

In this embodiment, the wall thickness measurement data at the inner portion 52 of the bottom plate is compared with the minimum limit value (for example, 5.5 m / m), and the measurement data below this limit value is displayed in a square frame as shown in FIG. I try to surround it. Of course, the square frame is filled in by the printer 42.

On the other hand, if it is specified in step 201 that the measurement data of the annular part 51 is to be transferred, the steps 207 to 211 having the same contents as the steps 202 to 206 are described.
However, as described above, this annular section 51 is executed.
Has many measurement points, so step 20
The data distribution processing in 8 is performed by the section 51a shown in FIG.
51b, ..., and the recording and display in steps 210 and 211 are also performed in each of the above sections 51 as shown in FIG.
a, 51b, ... every time. The recording format shown in FIG. 8 also satisfies the format of the above report.

As described above, according to this embodiment, the tank bottom plate 5 is not required to be manually filled in with the measured data.
You can create a report about.

In the above embodiment, the sorted data is temporarily stored in the memory 45, but it is also possible to record the data transferred from the data recorder 3 in the printer 42 while sorting the data in real time.

Further, in the data recorder 3, the measurement data D _1-1 , D _1-2 , ... For the respective measurement points P _1-1 , P _1-2 , ... In the form shown in FIG. 9 are stored in the memory 36. It is also possible to store and store the contents of this memory in the data processing unit 4 as shown in FIG.

〔The invention's effect〕

According to the present invention, the thickness measurement result at the current measurement point and 1
Since the wall thickness measurement result at the immediately previous measurement point can be displayed, it means that the wall thickness measurement result at the current measurement point is abnormal, that is, there was an error in the wall thickness measurement operation at the current measurement point. This can be easily recognized based on the comparison of the above two measurement results.

When it is recognized that the wall thickness measurement result at the current measurement point is abnormal, the wall thickness at the measurement point may be re-measured to obtain a correct measurement result.
The reliability of the measurement result can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram conceptually showing one embodiment of the wall thickness measuring apparatus according to the present invention, FIG. 2 is a view exemplifying measurement points at an inner portion of the bottom plate of a tank bottom plate, and FIG. 3 is a bottom plate. FIG. 4 is a diagram exemplifying one section of the annular part and its measurement points, FIG. 4 is a flowchart exemplifying the procedure executed on the data recorder side shown in FIG. 1, and FIG. 5 is a data processing part shown in FIG. FIG. 6 is a flowchart showing an example of the procedure to be executed, FIG. 6 is a diagram showing a mode of distribution of measurement data for the inner portion of the bottom plate, and FIG. 7 is a diagram showing the recorded contents of the printer for the inner portion of the bottom plate. FIG. 8 is a diagram showing the recorded contents of the printer for the annular portion, and FIG. 9 is a diagram showing another mode of recording data in the data recorder. 1 ... probe, 2 ... wall thickness measuring device, 3 ... data recording device, 31 ... 33 ... display element, 34 ... input key, 36 ... memory, 37 ... processor, 4 ... data processing unit , 41 …… Processor, 42 …… Printer, 43 …… Display, 44 …… Keyboard, 45 …… Memory, 5 …… Tank bottom plate, 51 …… Annular part, 52 …… Bottom plate inner part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-177210 (JP, A) JP-A-49-33754 (JP, A) Actual development Sho-60-120312 (JP, U) Report, No.22 "Mityo Co., Ltd. 1-10

Claims (1)

[Claims] 1. A wall thickness measuring device for sequentially measuring wall thicknesses of measurement points set at a plurality of points to be measured and recording the same in a memory, comprising: first, second and third display elements; An instruction switch, the address of the current measurement point is displayed on the first display element, the wall thickness measurement result at the current measurement point is displayed on the second display element, and based on the operation of the switch, The address of the next measurement point is displayed on the first display element, the wall thickness measurement result displayed on the second display element is displayed on the third display element, and the wall thickness measurement result is displayed on the memory. A thickness measuring device comprising: