JP2020134219A - Ultrasonic wave measurement system, ultrasonic wave measurement method and ultrasonic wave probe-loaded unit - Google Patents

Abstract

To provide an ultrasonic wave measurement system that achieves efficiency of a measurement work in an ultrasonic wave measurement for performing a wall thickness inspection or flaw inspection, in particular, the ultrasonic wave measurement with respect to a tubular body.SOLUTION: An ultrasonic wave measurement system 1, which is a measurement system for performing a wall thickness of a tubular body or flaw inspection thereof, comprises: an ultrasonic wave probe 11; a range-finding device 12 that measures a distance between the ultrasonic wave probe 11 and a reference position; and a control device 13 that causes the ultrasonic wave probe 11 to perform an ultrasonic wave measurement by transmission/reception of an ultrasonic wave in a prescribed cycle, receives an ultrasonic wave measurement signal obtained by the ultrasonic wave measurement, receives a distance measurement signal from the range-finding device 12 in synchronization with the reception of the ultrasonic wave measurement signal, and logs information based on the ultrasonic wave measurement signal and information based on the distance measurement signal in association with each other.SELECTED DRAWING: Figure 1

Description

The present invention relates to an ultrasonic measurement system, an ultrasonic measurement method, and an ultrasonic probe mounting unit for performing a wall thickness inspection or a flaw detection inspection.

As one of the methods for performing non-destructive inspection, there is an inspection method using ultrasonic waves. Ultrasonic measurement utilizes the reflection of ultrasonic waves at the interface of a substance, and measures the thickness of the measurement target and the presence or absence of cracks based on the time difference of the reflected waves to be measured.
Patent Documents 1 and 2 disclose conventional techniques for such ultrasonic measurement.

Japanese Unexamined Patent Publication No. 10-332649 Japanese Unexamined Patent Publication No. 2005-227119

In the conventional ultrasonic measuring device, as described in paragraph 0004 of Patent Document 2, the operator touches the probe to the measurement target to perform measurement. For example, when inspecting whether or not a tubular body such as a pipe has a uniform wall thickness as a whole and acquiring the data, the points to be measured are determined in advance, and each measurement point is one point at a time. It required a very complicated work of contacting the probe and recording the data.

In view of the above points, the present invention is an ultrasonic measurement for performing a wall thickness inspection or a flaw detection inspection, and is an ultrasonic measurement capable of improving the efficiency of measurement work, particularly in ultrasonic measurement for a tubular body. It is an object of the present invention to provide a system, an ultrasonic measurement method, and an ultrasonic probe mounting unit.

(Structure 1)
A measuring system for performing a wall thickness inspection or a flaw detection inspection of a tubular body, the ultrasonic probe, a ranging device for measuring the distance between the ultrasonic probe and a reference position, and the ultrasonic probe. The ultrasonic probe is made to perform ultrasonic measurement by transmitting and receiving ultrasonic waves at a predetermined cycle or at a predetermined position, and the ultrasonic measurement signal obtained by this is received and the distance from the distance measuring device is synchronized with this. An ultrasonic measurement system including a control device that receives a measurement signal and logs information based on the ultrasonic measurement signal in association with information based on the distance measurement signal.

(Structure 2)
The ultrasonic measurement system according to configuration 1, wherein the distance measuring device is a wire winding type linear encoder.

(Structure 3)
An ultrasonic measurement method for performing a wall thickness inspection or a flaw detection inspection of a tubular body using the ultrasonic measurement system according to the configuration 1 or 2, wherein the step of setting the reference position of the distance measuring device and the step. By moving the ultrasonic probe along the axial direction of the tubular body, information based on the ultrasonic measurement signal and information based on the distance measurement signal at a plurality of points in the axial direction of the tubular body are associated with each other. An ultrasonic measurement method comprising: a step of continuously performing a log processing.

(Structure 4)
An ultrasonic probe mounting unit provided with the ultrasonic probe used in the ultrasonic measurement system according to the configuration 1 or 2, at least at two points in a direction orthogonal to the axial direction of the tubular body. The first rotating body in contact with the surface of the tubular body, the second rotating body located in front of or behind the first rotating body in the axial direction and in contact with the surface of the tubular body at at least one point, and the above. It is characterized by including a roller type ultrasonic probe which is an ultrasonic probe, and a housing portion including the first rotating body, the second rotating body, and the roller type ultrasonic probe. Unit with ultrasonic probe.

(Structure 5)
The ultrasonic probe mounted according to the configuration 4, wherein the first rotating body is formed so that the diameter of the rotating body decreases from the outside to the inside in a direction orthogonal to the axial direction. unit.

(Structure 6)
The second rotating body comes into contact with the surface of the tubular body at at least two points in the direction orthogonal to the axial direction, and the diameter of the rotating body decreases from the outside to the inside in the direction orthogonal to the axial direction. The ultrasonic probe mounting unit according to the configuration 4 or 5, characterized in that it is formed.

(Structure 7)
The roller type ultrasonic probe is attached to the housing portion via an elastic body, and the elastic body is in contact with the surface of the tubular body with the first rotating body and the second rotating body. It is characterized by having an elastic force that presses the roller-type ultrasonic probe against the surface of the tubular body at a pressure suitable for the measurement conditions of the roller-type ultrasonic probe. The unit for mounting an ultrasonic probe according to any one of configurations 4 to 6.

(Structure 8)
From the configuration 4 in which the tubular body is a water pipe of a boiler water cooling wall, and is provided with a water pipe different from the water pipe to be measured or a third rotating body in contact with fins connecting the water pipes to each other. The ultrasonic probe-mounted unit according to any one of 7.

(Structure 9)
The configuration is characterized in that the third rotating body is attached to the housing portion so as to be orthogonal to the axial direction and to adjust the amount of protrusion in the direction horizontal to the wall surface of the boiler water cooling wall. 8. The unit equipped with an ultrasonic probe according to 8.

(Structure 10)
The super-superstructure according to the configuration 8 or 9, wherein the third rotating body is attached to the housing portion so that the amount of protrusion in the direction perpendicular to the wall surface of the boiler water cooling wall can be adjusted. A unit equipped with a sound wave probe.

(Structure 11)
The ultrasonic probe mounting unit according to any one of configurations 8 to 10, wherein the third rotating body is configured to be detachable from both side surfaces of the housing portion.

(Structure 12)
Any of the configurations 4 to 7, wherein the tubular body is a water pipe of a boiler water cooling wall, and by providing a plurality of the roller type ultrasonic probes, ultrasonic measurement of a plurality of water pipes can be performed at the same time. A unit equipped with an ultrasonic probe described in Crab.

According to the ultrasonic measurement system of the present invention, the efficiency of measurement work can be improved.

The figure which shows the outline of the structure of the ultrasonic measurement system of embodiment which concerns on this invention. Partially disassembled perspective view showing the ultrasonic probe mounting unit of the embodiment An exploded perspective view of a roller-type ultrasonic probe Explanatory drawing about the usage state of the unit equipped with the ultrasonic probe Explanatory drawing about the usage state of the unit equipped with the ultrasonic probe Explanatory drawing about the usage state of the unit equipped with the ultrasonic probe Explanatory drawing about the usage state of the unit equipped with the ultrasonic probe Explanatory drawing about the usage state of the ultrasonic measurement system Flowchart showing the outline of the processing operation of the ultrasonic measurement system

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. The following embodiment is an embodiment of the present invention, and does not limit the present invention to the scope thereof.

FIG. 1 is a diagram showing an outline of the configuration of the ultrasonic measurement system of the present embodiment.
The ultrasonic measurement system 1 of the present embodiment is a system for inspecting the wall thickness of a tubular body, and is particularly suitable for inspecting the wall thickness of a water pipe of a boiler water cooling wall.
The ultrasonic measurement system 1 includes an ultrasonic probe mounting unit 11 provided with an ultrasonic probe, a wire winding type linear encoder (distance measuring device) 12, and a control device 13 as a rough configuration thereof. ..

The ultrasonic probe mounting unit 11 is provided with a wheel and a roller type ultrasonic probe at the bottom thereof, and is brought into contact with the water pipe of the boiler water cooling wall and travels along the axial direction thereof (manually in this embodiment). By running), it is possible to continuously transmit and receive ultrasonic waves at a plurality of points along the axial direction of the water pipe.
A more specific configuration of the ultrasonic probe mounting unit 11 will be described later.

The wire take-up type linear encoder 12 is an encoder that detects the drawn length of the take-up type wire 122. By installing the wire take-up linear encoder 12 at the reference position and attaching the tip of the wire 122 to the ultrasonic probe mounting unit 11, the wire take-up linear encoder 12 (reference position) and the ultrasonic probe are mounted. Measure the relative distance of the unit 11.
The wire winding type linear encoder 12 is provided with a magnet at the bottom thereof, and is attached to and detached from the water pipe by the magnet. The position of the magnet provided in the wire-winding linear encoder 12 changes between a position near the bottom and a position away from the bottom as the knob 121 rotates. As a result, the knob 121 is rotated to attach / detach it to / from the water pipe.

The control device 13 acquires the thickness information of the water pipe to be measured, and the position information of the point where the thickness is measured (wire winding type linear encoder 12 (reference position) and the ultrasonic probe mounting unit 11 Relative distance) is acquired, and the thickness information and the position information are associated and logged.
The control device 13 includes a calculation unit 131 that performs various calculation processes, a storage unit 132, a distance acquisition unit 133 that receives a distance measurement signal from the wire winding type linear encoder 12, and an ultrasonic probe mounting unit 11. The ultrasonic transmission / reception control unit 134, which controls the transmission of the ultrasonic transmission probe and receives the ultrasonic measurement signal from the ultrasonic reception probe, and the peak of the waveform of the received ultrasonic measurement signal are discriminated. It includes an ultrasonic waveform processing unit 135 and a thickness determination unit 136 that calculates the thickness based on the inter-peak distance and sound velocity information.
The control device 13 causes the ultrasonic probe to perform ultrasonic measurement by transmitting and receiving ultrasonic waves at a predetermined cycle, receives the ultrasonic measurement signal obtained by the ultrasonic measurement, and synchronizes with the ultrasonic measurement signal. It has a function of receiving a distance measurement signal from (a wire winding type linear encoder) and logging information based on the ultrasonic measurement signal in association with information based on the distance measurement signal.

FIG. 2 shows an exploded perspective view of a portion of the roller type ultrasonic probe 112 of the ultrasonic probe mounting unit 11.
The ultrasonic probe mounting unit 11 includes a frame (housing portion) 111, a roller type ultrasonic probe 112 attached near the substantially center of the frame 111, and wheels 114a provided at the four corners of the bottom of the frame 111. It includes 114b, 115a, 115b, and a wheel 116 projecting from the side surface of the frame 111.

FIG. 3 is an exploded perspective view of the roller type ultrasonic probe 112.
The roller type ultrasonic probe 112 has a cork plate 1124 arranged at the center thereof as an ultrasonic absorption layer (prevention of ultrasonic waves from leaking from the transmitting side to the receiving side), and one side of the cork plate 1124 as a boundary. Has a symmetrical structure on the left and right sides, where is the transmitting side and the other is the receiving side.
The shaft member 1121a is provided with a transmission probe, and a roller portion 1123a is attached to the shaft via a bearing 1122a. The roller portion 1123a is provided so as to cover the shaft member 1121a including the transmission probe. The shaft member 1121b on the other side is provided with a receiving probe, and the roller portion 1123b is attached via the bearing 1122b. The roller portion 1123b is also provided so as to cover the shaft member 1121b including the transmission probe.
In the roller type ultrasonic probe 112, the roller portions 1123a and 1123b are rotatable with respect to the shaft according to the above configuration, and the roller portions 1123a and 1123b can be moved so as to be rolled on the surface to be inspected. As a result, the distance between the ultrasonic probe and the surface to be inspected is kept constant.
In addition, in order to measure accurately with the roller type ultrasonic probe, it is necessary to keep the contact pressure with respect to the inspection target within a predetermined range.

As shown in FIG. 2, the roller type ultrasonic probe 112 is held by a support member 119 that fixedly supports the shaft thereof.
The support member 119 has a rod 119A that is slidably inserted into the hole H of the frame 111, and the rod 119A is formed with a screw hole for screwing the wing bolt B4.
The roller type ultrasonic probe 112 is attached to the frame 111 by attaching the spring 113 to the rod 119A, inserting the rod 119A into the hole H of the frame 111, and screwing the wing bolt B4. In this way, the roller-type ultrasonic probe 112 is attached to the frame (housing portion) 111 via the spring (elastic body) 113, and the roller-type ultrasonic probe 112 is attached by the elastic force of the spring 113. There is a pressing force that presses against the inspection target.

The wheels 114a, 114b, 115a, 115b provided on the bottom of the frame 111 are wheels for contacting the water pipe and traveling along the axial direction thereof.
As shown in FIG. 4, the wheels 114a and 114b are wheels that come into contact with the water pipe 21 at two points in a direction orthogonal to the axial direction of the water pipe (tubular body) 21 (the direction perpendicular to the paper surface of FIG. 4). .. That is, the two wheels 114a and 114b correspond to "the first rotating body that contacts the surface of the tubular body at at least two points in the direction orthogonal to the axial direction of the tubular body".
Further, the wheels 114a and 114b are formed so that their diameters decrease from the outside to the inside in a direction orthogonal to the axial direction (direction perpendicular to the paper surface in the figure) of the water pipe (tubular body) 21, respectively. .. As a result, as can be understood from FIG. 4, a contact surface along the surface of a tubular body such as a water pipe can be obtained, so that more stable running performance can be obtained.
In the present embodiment, the wheels 114a and 114b are formed as separate bodies as an example, but the wheels 114a and 114b may be integrally formed (connected).

The wheels 115a and 115b (second rotating body) are located in front of (or behind) the water pipe (tubular body) 21 in the axial direction with respect to the wheels 114a and 114b (first rotating body), and the basic configuration thereof is the wheel 114a. , 114b.
In the present embodiment, the wheels 115a and 115b, which are the second rotating bodies, are also tubular at at least two points in the direction orthogonal to the axial direction of the tubular body, similarly to the wheels 114a and 114b (the first rotating body). Although it is configured to "contact the surface of the body", the second rotating body may be configured to contact the surface of the tubular body at one point (that is, one wheel). When the second rotating body is configured to contact the surface of the tubular body at one point (that is, one wheel), a wheel having a substantially uniform diameter is used in the width direction of the ultrasonic probe mounting unit 11 (water pipe 21). It is preferable to provide it so as to be located approximately in the center of the direction (direction orthogonal to the axial direction of).
It is arbitrary which of the wheels 114a and 114b and the wheels 115a and 115b is regarded as the first rotating body and the second rotating body, so that the wheels 114a and 114b are in contact with the surface of the tubular body at one point. (That is, one wheel) may be used. In the present embodiment, since the wheels 116 described later are on the sides of the wheels 114a and 114b, the number of wheels is reduced by having one wheel on the side of the wheels 114a and 114b (with the tubular body surface). It is possible to reduce the decrease in stability due to (reducing the number of contact points). When the wheels 114a and 114b are configured to be in contact with the surface of the tubular body at one point (that is, one wheel), as described above, a wheel having a substantially uniform diameter is used as the ultrasonic probe mounting unit 11. It may be provided so as to be located substantially near the center in the width direction of the wheel 114a, or the wheel 114a may be simply deleted. This is because stability can be obtained by leaving the side of the wheel 114b that has symmetry with the wheel 116, which will be described later.

As described above, the roller type ultrasonic probe 112 is attached to the frame 111 via the spring 113.
The elastic force of the spring 113 is the state in which the ultrasonic probe mounting unit 11 is used, that is, the wheels 114a, 114b, 115a, 115b of the roller type ultrasonic probe 112 having the above configuration come into contact with the water pipe 21. In this state (FIG. 4), the roller type ultrasonic probe 112 is set to be pressed against the water pipe 21 at a predetermined measurement pressure defined for the roller type ultrasonic probe 112.
That is, the spring (elastic body) 113 states, "In a state where the first rotating body and the second rotating body are in contact with the surface of the tubular body, the roller type ultrasonic probe is placed on the surface of the tubular body. It has an elastic force that presses with a pressure suitable for the measurement conditions of the ultrasonic probe. " The suspension function of the spring 113 allows the roller-type ultrasonic probe 112 to follow even the slight unevenness caused by the thinning of the water pipe 21.

In addition to the wheels 114a, 114b, 115a, and 115b, the ultrasonic probe mounting unit 11 includes a wheel 116 (third rotating body) provided so as to project from the side surface of the frame 111.
The wheel 116 is a wheel that is in contact with a water pipe 21 (or a fin 22 that connects the water pipes 21 to each other) different from the water pipe 21 to be measured, whereby the ultrasonic probe mounting unit 11 is brought into contact with the water pipe 21. It is intended to reduce the deviation of the wheel in the circumferential direction and to improve the running stability of the ultrasonic probe mounting unit 11.

The wheel 116 is provided at the lower end of the rod 118. The rod 118 is inserted through the attachment portion C3 of the rod 117 attached to the frame 111 and fixed by tightening the wing bolt B3, and the vertical position can be adjusted. That is, the wheel 116 is "attached so that the amount of protrusion in the direction perpendicular to the wall surface of the boiler water cooling wall with respect to the frame (housing portion) 111 can be adjusted".
The rod 117 is inserted through the mounting portion C1 or C2 provided on the side surface of the frame 111 and fixed by tightening the wing bolts B1 or B2, and the position in the width direction can be adjusted. That is, the wheel 116 is attached to the frame (housing portion) 111 so as to be orthogonal to the axial direction of the water pipe (tubular body) 21 and to adjust the amount of protrusion in the horizontal direction with the wall surface of the boiler water cooling wall. It is a thing.
The rod 117 is removable from the frame 111, and can be selectively attached to the attachment portion C1 on one side surface side of the frame 111 or the attachment portion C2 on the other side surface side. That is, the wheel 116 is "detachable with respect to both side surfaces of the frame (housing portion) 111".
Like the wheels 114a, 114b, 115a, and 115b, the wheel 116 is also a wheel whose diameter fluctuates along the direction along its rotation axis, and is composed of a wheel whose diameter decreases as the distance from the frame 111 increases. There is.

5 to 7 are views for explaining the usage state of the ultrasonic probe mounting unit 11 with respect to the water pipe 21 of the boiler water cooling wall 2.
FIG. 5 shows a state in which the ultrasonic probe mounting unit 11 is installed substantially perpendicular to the wall surface of the boiler water cooling wall 2. By appropriately adjusting the amount of protrusion of the rod 117 and the rod 118, the inclined surface of the wheel 116 is positioned along the outer peripheral surface of the water pipe 21 (the water pipe next to the water pipe 21 to be measured), so that stable running (stable running) Manual) can be done. Since the wheel 116 is composed of wheels whose diameter decreases as the distance from the frame 111 increases, stress is generated not only in the vertical direction but also in the horizontal direction at the contact between the water pipe 21 and the wheel 116. Therefore, the ultrasonic probe mounting unit 11 Is lightly pressed against the water pipe 21 by hand to improve the sense of stability.

6 and 7 are explanatory views when the ultrasonic probe mounting unit 11 is tilted to the left and right, respectively. As can be understood from FIGS. 6 and 7, the measurement positions are changed by appropriately adjusting the protruding widths of the rod 117 and the rod 118 and changing the mounting position of the rod 117 at the mounting portions C1 and C2. The thickness of the water pipe 21 can be measured.

Next, the method of measuring the wall thickness of the water pipe 21 of the boiler water cooling wall 2 used by the ultrasonic measurement system 1 of the present embodiment (acquisition of wall thickness data) and the outline of the processing in the ultrasonic measurement system 1 at that time. , 8 and 9 will be described with reference to FIGS.

As shown in FIG. 8, as a preparation for measurement, a wire take-up type linear encoder 12 is attached to a water pipe 21 at a reference position, and a wire 122 is attached to an ultrasonic probe mounting unit 11 (wire). 122 may be pre-installed). In addition, the protrusion width amounts of the rod 117 and the rod 118 of the ultrasonic probe mounting unit 11 are appropriately adjusted according to the boiler water cooling wall 2.
Further, the control device 13 is connected to the wire winding type linear encoder 12 and the ultrasonic probe mounting unit 11 (whether wired or wireless), the control device 13 is started up, and necessary settings are made.
When the measurement is ready by the above, the ultrasonic probe mounting unit 11 is simply moved along the water pipe 21 by hand, and a plurality of measurement points along the longitudinal direction of the water pipe 21 are performed by the following processing. The wall thickness data of is acquired.

FIG. 9 is a flowchart showing an outline of processing in the control device 13.

Steps 901 and 903 are processes for transmitting and receiving ultrasonic waves at each sampling cycle. In the present embodiment, ultrasonic waves are transmitted and received 10 or 20 times per second. Under the control of the arithmetic unit 131, the ultrasonic transmission / reception control unit 134 transmits the control signal to the ultrasonic probe-mounted unit 11 and the ultrasonic signal measured from the ultrasonic probe-mounted unit 11. It is done by reception.

In the following step 904, a process of acquiring distance information is performed. The process is performed by receiving the distance measurement signal from the wire winding type linear encoder 12 in the distance acquisition unit 133 under the control of the calculation unit 131. The acquisition of distance information is performed in synchronization with the ultrasonic measurement.

In step 905, a process of calculating the thickness based on the ultrasonic measurement signal acquired in step 903 is performed. Under the control of the calculation unit 131, the ultrasonic waveform processing unit 135 performs the processing for discriminating the peak of the waveform of the received ultrasonic measurement signal, and the thickness discriminating unit 136 performs the inter-peak distance and sound velocity information (acquired in advance or). It is performed by calculating the thickness based on the set information regarding the sound velocity of the water pipe 21).

In step 906, the thickness information calculated in step 905 and the distance information acquired in step 904 are associated and stored in the storage unit 132. In addition, time information (or date and time information) and the like may also be associated and logged.

After step 906, the process returns to step 901 and the above process is repeated, whereby the thickness information and the distance information are acquired at a predetermined cycle, the thickness information and the distance information are associated and logged, and an end instruction is given. If there is, the process ends (step 902: Yes → end).

By the above processing, the ultrasonic probe mounting unit 11 is manually moved along the water tube 21 without being particularly conscious of the position of the measurement point and the speed at which the ultrasonic probe mounting unit 11 is moved. The wall thickness data is acquired at a plurality of measurement points along the axial direction (longitudinal direction) of 21. It is not necessary to pay particular attention to the moving direction of the ultrasonic probe mounting unit 11, and the ultrasonic probe mounting unit 11 may be reciprocated along the water pipe 21. The wall thickness data can be enriched by reciprocating the ultrasonic probe mounting unit 11 along the water pipe 21 by 2 to 3 degrees.

As described above, according to the ultrasonic measurement system 1 of the present embodiment, the wall thickness data at a plurality of measurement points is semi-automatically acquired along the axial direction (longitudinal direction) of the water pipe 21, so that the measurement work can be performed. It becomes very simple and the measurement work can be made more efficient.
Further, by providing the wheel 116 (third rotating body) whose protrusion width can be adjusted up, down, left and right, it is possible to stably measure the thickness at different angles. It can also be easily applied to boiler water-cooled walls of different sizes.

In the present embodiment, the thickness of the water pipe of the boiler water cooling wall is measured as an example, but the present invention is not limited to this, and can be used for measuring an arbitrary tubular body. Further, the flaw detection inspection may be performed instead of the wall thickness measurement.
Further, in the present embodiment, the signal obtained from the wire winding type linear encoder and the signal obtained from the roller type ultrasonic probe are calculated as distance information and thickness information, respectively, and then associated with each other. Although it is supposed to be logged, it is arbitrary what value is converted before logging, for example, information closer to raw data (data obtained by A / D conversion of analog signals from each measuring instrument, etc.) ) May be used for logging. That is, it suffices that "information based on" the ultrasonic measurement signal and "information based on" the distance measurement signal are associated and logged.

In the present embodiment, a wire winding type linear encoder is taken as an example as a range finder, but the present invention is not limited to this, and any option capable of "measuring the distance between the ultrasonic probe and the reference position" is possible. Equipment can be used (eg, laser rangefinder).
Further, although the distance measuring device is taken as an example in which the unit is separate from the ultrasonic probe mounting unit, the distance measuring device may be integrally configured with the ultrasonic probe mounting unit. I do not care. For example, in the present embodiment, the wire winding type linear encoder may be mounted on the ultrasonic probe mounting unit, and the wire tip may be fixed at the “reference position”.

In the present embodiment, the ultrasonic measurement is performed at a predetermined time interval (sampling cycle) as an example, but the ultrasonic measurement may be performed at a predetermined distance interval (or a preset measurement position). Based on the distance information obtained from the distance measuring device, when it is determined that the unit equipped with the ultrasonic probe has moved a predetermined distance (or has reached a preset measurement position), ultrasonic measurement is performed. is there.
In addition, an input means such as a "measurement switch" is provided in the unit equipped with the ultrasonic probe, and ultrasonic measurement (acquisition of thickness information and distance information) is performed when there is an input to the input means. You may.

In the present embodiment, the control device 13 includes a calculation unit 131, a storage unit 132, a distance acquisition unit 133, an ultrasonic transmission / reception control unit 134, an ultrasonic waveform processing unit 135, and a thickness determination unit 136. Although it is described as being provided, it does not limitly indicate that each functional part is formed by being distinguished in terms of hardware. For example, all functions may be realized by software on one device. On the contrary, a part or all of each functional unit or any combination may be configured in hardware by a dedicated circuit or the like. Further, the device may be such that a part of each functional unit is configured as a separate body.

It should be noted that a plurality of ultrasonic probe mounting units may be connected in parallel. Since the boiler water cooling wall has a configuration in which multiple water pipes are lined up in parallel, by connecting multiple ultrasonic probe mounting units in parallel, it is possible to measure multiple water pipes at once. Is. At this time, it is preferable to have a configuration in which the mutual distance between the plurality of ultrasonic probe mounting units can be adjusted.
Further, instead of connecting a plurality of ultrasonic probe mounting units, a plurality of roller type ultrasonic probe portions may be provided. For example, in the ultrasonic probe mounting unit 11 of the present embodiment, a roller type ultrasonic probe may be provided at the tip of the rod 118 instead of the wheel 116.

1. 1. .. .. Ultrasonic measurement system 11. .. .. Unit with ultrasonic probe 111. .. .. Frame (housing part)
112. .. .. Roller type ultrasonic probe 113. .. .. Spring (elastic body)
114a, 114b. .. .. Wheel (first rotating body)
115a, 115b. .. .. Wheel (second rotating body)
116. .. .. Wheel (3rd rotating body)
12. .. .. Wire take-up linear encoder (distance measuring device)
13. .. .. Control device 2. .. .. Boiler water cooling wall 21. .. .. Water pipe (tubular body)
22. .. .. fin

Claims (7)

A measurement system for performing wall thickness inspection or flaw detection inspection of tubular bodies.
With an ultrasonic probe,
A distance measuring device that measures the distance between the ultrasonic probe and the reference position,
The ultrasonic probe is made to perform ultrasonic measurement by transmitting and receiving ultrasonic waves at a predetermined cycle or at a predetermined position, and the ultrasonic measurement signal obtained by this is received and synchronized with this from the distance measuring device. A control device that receives the distance measurement signal of the above and logs the information based on the ultrasonic measurement signal and the information based on the distance measurement signal in association with each other.
An ultrasonic measurement system characterized by being equipped with. An ultrasonic measurement method for performing a wall thickness inspection or a flaw detection inspection of a tubular body using the ultrasonic measurement system according to claim 1.
The step of setting the reference position of the distance measuring device and
By moving the ultrasonic probe along the axial direction of the tubular body, information based on the ultrasonic measurement signal and information based on the distance measurement signal at a plurality of points in the axial direction of the tubular body are associated with each other. And the step of continuously performing the log processing
An ultrasonic measurement method comprising. An ultrasonic probe mounting unit provided with the ultrasonic probe, which is used in the ultrasonic measurement system according to claim 1.
A first rotating body that contacts the surface of the tubular body at at least two points in a direction orthogonal to the axial direction of the tubular body.
A second rotating body located forward or backward in the axial direction with respect to the first rotating body and in contact with the surface of the tubular body at at least one point.
The roller type ultrasonic probe, which is the ultrasonic probe, and
A housing portion including the first rotating body, the second rotating body, and the roller type ultrasonic probe, and
A unit equipped with an ultrasonic probe, which is characterized by being equipped with. The roller type ultrasonic probe is attached to the housing portion via an elastic body, and the elastic body is in contact with the surface of the tubular body with the first rotating body and the second rotating body. It is characterized by having an elastic force that presses the roller-type ultrasonic probe against the surface of the tubular body at a pressure suitable for the measurement conditions of the roller-type ultrasonic probe. The ultrasonic probe mounting unit according to claim 3. 3. A third aspect of the present invention, wherein the tubular body is a water pipe of a boiler water cooling wall, and includes a water pipe different from the water pipe to be measured or a third rotating body in contact with fins connecting the water pipes to each other. Or the unit equipped with the ultrasonic probe according to 4. The third rotating body is attached to the housing portion so as to be orthogonal to the axial direction and the amount of protrusion in the direction horizontal to the wall surface of the boiler water cooling wall can be adjusted, or the housing. The ultrasonic probe mounting unit according to claim 5, wherein the amount of protrusion in a direction perpendicular to the wall surface of the boiler water cooling wall is adjustablely attached to the portion. According to claim 3 or 4, the tubular body is a water pipe of a boiler water cooling wall, and by providing a plurality of the roller type ultrasonic probes, ultrasonic measurement of a plurality of water pipes can be performed at the same time. The unit equipped with the ultrasonic probe described.