JP2023101197A - Ultrasonic data analysis device, ultrasonic inspection device, ultrasonic data analysis method, ultrasonic inspection method, program, and recording medium - Google Patents

Abstract

To provide an ultrasonic data analysis device that can measure the thickness of a cladding tube.SOLUTION: An ultrasonic data analysis device of the present invention includes an ultrasonic data acquisition unit, a gate setting unit, an echo detection unit, and an analysis unit. The ultrasonic data acquisition unit acquires ultrasonic signal data of a cladding tube to be inspected. The gate setting unit sets at least three gates for thickness measurement. The echo detection unit detects, from the ultrasonic signal data, an inside echo, an outside echo, and a multiecho based on the gates for thickness measurement. The analysis unit analyzes the thickness of the tube to be inspected based on the inside echo, the outside echo, and the multiecho.SELECTED DRAWING: Figure 1

Description

The present invention relates to an ultrasonic data analysis apparatus, an ultrasonic inspection apparatus, an ultrasonic data analysis method, an ultrasonic inspection method, a program, and a recording medium.

2. Description of the Related Art In various plants and factories in the chemical industry, there are a large number of pipes, and non-destructive inspection for inspecting cracks, corrosion, etc. of pipes with ultrasonic waves is performed. In the inspection using ultrasonic waves, ultrasonic waves are transmitted while sending water to the pipe, and ultrasonic waves are irradiated to the inner wall of the pipe using the liquid as a medium. is a method of detecting (for example, Patent Document 1).

When measuring the thickness of a pipe in an ultrasonic inspection method such as that of Patent Document 1, two gates serving as references for detecting echoes are set, and echoes intersecting with the two gates are reflected on the inner surface of the pipe. The thickness of the pipe is measured by detecting a sound wave echo (S echo) and an ultrasonic echo (B1 echo) reflected on the outer surface of the pipe and measuring the time difference between the S echo and the B1 echo.

Patent No. 5042153

By the way, there are pipes such as glass-lined pipes having a film formed on the inner surface thereof. When ultrasonic inspection is performed on such a pipe, the echo of the coating surface (GS echo), the echo of the boundary between the coating and the inner surface of the pipe (G1 echo), the echo reflected multiple times inside the coating (G2 echo), and the pipe An echo (B1 echo) is generated as reflected by the outer surface.

In this case, the G2 echo crosses the gate for detecting the B1 echo, and the G2 echo becomes noise, making it impossible to measure the thickness of the tube.

Therefore, the present invention provides an ultrasonic data analysis device, an ultrasonic inspection device, an ultrasonic data analysis method, an ultrasonic inspection method, a program, and a recording medium that can measure the thickness of a cladding tube having a film formed on the inner surface. intended to

In order to achieve the above object, the ultrasound data analysis apparatus of the present invention comprises:
including an ultrasound data acquisition unit, a gate setting unit, an echo detection unit, an analysis unit,
The ultrasonic data acquisition unit acquires ultrasonic signal data of the cladding tube to be inspected,
The gate setting unit sets at least three thickness measurement gates,
The echo detection unit detects an inner surface echo, an outer surface echo, and multiple echoes from the ultrasonic signal data based on the thickness measurement gate,
The analysis unit analyzes the thickness of the tube to be inspected based on the inner surface echo, the outer surface echo, and the multiple echoes.

The ultrasonic inspection apparatus of the present invention is
including an ultrasound data analysis unit,
The ultrasonic data analysis unit is the ultrasonic data analysis apparatus of the present invention.

The ultrasonic data analysis method of the present invention comprises:
Including ultrasound data acquisition process, gate setting process, echo detection process, analysis process,
The ultrasonic data acquisition step acquires ultrasonic signal data of the cladding tube to be inspected,
The gate setting step sets at least three gates for thickness measurement,
The echo detection step detects an inner surface echo, an outer surface echo, and multiple echoes from the ultrasonic signal data based on the thickness measurement gate,
The analyzing step analyzes the thickness of the tube to be inspected based on the inner surface echo, the outer surface echo, and the multiple echoes.

The ultrasonic inspection method of the present invention is
An ultrasonic inspection method for ultrasonically inspecting the thickness of a cladding tube,
including an ultrasound data analysis step;
The ultrasonic data analysis step is the ultrasonic data analysis method of the present invention.

A first program of the present invention is a program for causing a computer to execute an ultrasound data acquisition procedure, a gate setting procedure, an echo detection procedure, and an analysis procedure,
The ultrasonic data acquisition procedure acquires ultrasonic signal data of the cladding tube to be inspected,
The gate setting procedure sets at least three thickness measurement gates;
The echo detection procedure detects internal echoes, external echoes, and multiple echoes from the ultrasonic signal data based on the thickness measurement gates;
The analysis procedure is a program for analyzing the thickness of the tube to be inspected based on the inner surface echo, the outer surface echo, and the multiple echoes.

A second program of the present invention is a program for causing a computer to execute an ultrasonic inspection procedure for ultrasonically inspecting the thickness of a cladding tube,
The ultrasound examination procedure includes an ultrasound data analysis procedure,
The ultrasound data analysis procedure is a program executed by the first program.

A recording medium of the present invention is a computer-readable recording medium recording the program of the present invention.

According to the present invention, it is possible to measure the thickness of a cladding tube having a film formed on its inner surface.

FIG. 1 is a block diagram showing an example configuration of an ultrasound data analysis apparatus according to a first embodiment. FIG. 2 is a block diagram showing an example of the hardware configuration of the ultrasound data analysis apparatus according to the first embodiment; FIG. 3 is a flow chart showing an example of processing in the ultrasound data analysis apparatus according to the first embodiment. FIG. 4 is a block diagram showing an example configuration of an ultrasound data analysis apparatus according to the second embodiment. FIG. 5 is a flow chart showing an example of processing in the ultrasound data analysis apparatus of the second embodiment. FIGS. 6A and 6B are schematic diagrams showing an example of mapping of the pipe inner wall by the mapping unit. FIGS. 7A and 7B are schematic diagrams showing examples of pipe inner wall map ultrasonic echo images generated by the image generator. FIG. 8 is a schematic diagram showing an example of a pipe inner wall map ultrasonic echo image generated by the image generator. FIG. 9 is a schematic diagram showing an example of the configuration of an ultrasonic inspection apparatus according to Embodiment 3. FIG. FIG. 10 is a schematic diagram showing an example of the configuration of a probe device in the ultrasonic inspection apparatus of Embodiment 3. FIG. FIG. 11(a) is a schematic diagram showing an example of the flow of liquid in the probe of Embodiment 3, and FIG. 11(b) is a schematic showing an example of the configuration of the reflecting mirror and the rotation mechanism of the probe. It is a diagram. FIG. 12 is a schematic diagram showing an example of ultrasonically inspecting a circumferential flaw in a pipe to be inspected.

In the ultrasound data analysis apparatus of the present invention, for example, the analysis unit
analyzing the thickness of the cladding tube based on the time difference between the inner surface echo and the outer surface echo when the multiple echoes are detected after the outer surface echo;
When the multiple echo is detected before the external echo, the thickness of the cladding tube is analyzed based on the time difference between the internal echo and the multiple echo and the time difference between the multiple echo and the external echo. , may be a mode.

The ultrasound data analysis device of the present invention includes, for example, a mapping unit, an image generation unit, and a display unit,
The mapping unit maps part or all of the inner wall of the pipe to generate a pipe inner wall map,
The image generating unit generates a pipe inner wall map ultrasonic echo image by superimposing the ultrasonic signal data on the pipe inner wall map,
The display unit may display the pipe inner wall map ultrasonic echo image.

In the ultrasonic data analysis apparatus of the present invention, for example, the mapping unit maps a pipe cross-section perpendicular to the axial direction of the pipe to generate a pipe cross-section map,
The image generating unit generates a vascular cross-sectional map ultrasonic echo image by superimposing the ultrasonic signal data on the vascular cross-sectional map,
The display unit may display the pipe cross-section map ultrasonic echo image.

The ultrasonic inspection device of the present invention includes, for example, a probe device, a liquid pump, an ultrasonic control device, a lead cable, and an ultrasonic cable,
The probe includes a probe body and a probe tip,
The probe main body includes a cylindrical container and a probe,
The cylindrical container has a size that can be inserted into a pipe to be inspected,
The cylindrical container has a front end on the insertion direction side into the tube and a rear end on the opposite side to the front end,
The probe is housed inside the cylindrical container,
A channel through which a liquid can flow is formed between the probe and the inner wall of the cylindrical container,
In the channel, the liquid can flow from the rear end toward the front end,
The probe is capable of transmitting and receiving ultrasonic waves,
The tip of the probe has a size that can be inserted into the tube,
The probe tip includes a reflecting mirror and a rotating mechanism,
The reflecting mirror can reflect the ultrasonic waves transmitted from the probe and emit the ultrasonic waves in a direction perpendicular to the inner wall of the tube, and can reflect the ultrasonic waves reflected by the inner wall of the tube. can be reflected and incident on the probe,
The reflecting mirror is rotatably attached to the tip of the cylindrical container by the rotating mechanism,
The rotating mechanism can rotate the reflecting mirror using the flow of the liquid in the channel as a driving force,
The liquid pump is capable of sending the liquid to the rear end portion of the tubular container of the probe device through the lead cable,
The ultrasonic cable is inserted through the lead cable,
The ultrasonic cable connects the ultrasonic control device and the probe,
Transmission and reception of ultrasonic waves by the probe is controlled by the ultrasonic control device,
The ultrasonic control device and the ultrasonic data analysis unit are connected,
The ultrasonic data analysis unit may analyze ultrasonic signal data received by the probe and transmitted to the ultrasonic control device.

The ultrasonic inspection apparatus of the present invention may be used for inspecting cladding tubes, for example.

In the ultrasound data analysis method of the present invention, for example, the analysis step includes
analyzing the thickness of the cladding tube based on the time difference between the inner surface echo and the outer surface echo when the multiple echoes are detected after the outer surface echo;
When the multiple echo is detected before the external echo, the thickness of the cladding tube is analyzed based on the time difference between the internal echo and the multiple echo and the time difference between the multiple echo and the external echo. , may be a mode.

The ultrasound data analysis method of the present invention includes, for example, a mapping step, an image generation step, and a display step,
The mapping step generates a pipe inner wall map by mapping one step or all steps of the inner wall of the pipe based on the ultrasonic signal data;
The image generating step includes superimposing the ultrasonic signal data on the pipe inner wall map to generate a pipe inner wall map ultrasonic echo image,
The displaying step may display the pipe inner wall map ultrasonic echo image.

In the ultrasonic data analysis method of the present invention, for example, the mapping step generates a pipe cross-section map by mapping a pipe cross-section perpendicular to the axial direction of the pipe,
The image generating step includes superimposing the ultrasonic signal data on the pipe cross-section map to generate a pipe cross-section map ultrasonic echo image,
The display step may display the pipe cross-section map ultrasonic echo image.

In the first program of the present invention, for example, the analysis procedure is
analyzing the thickness of the cladding tube based on the time difference between the inner surface echo and the outer surface echo when the multiple echoes are detected after the outer surface echo;
When the multiple echo is detected before the external echo, the thickness of the cladding tube is analyzed based on the time difference between the internal echo and the multiple echo and the time difference between the multiple echo and the external echo. , may be a mode.

The first program of the present invention includes, for example, a mapping procedure, an image generation procedure, and a display procedure,
wherein the mapping step maps one or all steps of the inner wall of the pipe based on the ultrasound signal data to generate a map of the inner wall of the pipe;
The image generating procedure includes superimposing the ultrasonic signal data on the pipe inner wall map to generate a pipe inner wall map ultrasonic echo image,
The display procedure may display the pipe inner wall map ultrasonic echo image.

In the first program of the present invention, for example, the mapping step generates a pipe cross-section map by mapping a pipe cross-section perpendicular to the axial direction of the pipe,
The image generation procedure includes superimposing the ultrasonic signal data on the pipe cross-section map to generate a pipe cross-section map ultrasonic echo image,
The display procedure may display the pipe cross-section map ultrasonic echo image.

In the present invention, the term "coated tube" means a tube having a film formed on its inner surface, and its material, length, thickness, shape, location, application, etc. are not particularly limited. The film is not particularly limited, and examples thereof include lining, painting, and plating. Specific examples of the coated pipe include glass lined pipe, polyethylene lined pipe, hard vinyl chloride lined pipe, soft vinyl chloride lined pipe, non-tar epoxy coated pipe, and nylon coated pipe.

Next, an embodiment of the present invention will be described with reference to the drawings. The invention is not limited to the following embodiments. In each figure below, the same reference numerals are given to the same parts. In addition, the description of each embodiment can be used with reference to each other's description unless otherwise specified, and the configurations of the respective embodiments can be combined unless otherwise specified.

[Embodiment 1]
FIG. 1 is a block diagram showing an example configuration of an ultrasound data analysis apparatus 10 of this embodiment. As shown in FIG. 1, the apparatus 10 includes an ultrasound data acquisition section 11, a gate setting section 12, an echo detection section 13, and an analysis section . The device 10 may also include a storage unit, although not shown.

The device 10 may be, for example, a single device including each of the above units, or may be a device in which each of the above units can be connected via a communication network. Further, the device 10 can be connected to an external device, which will be described later, via the communication network. The communication line network is not particularly limited, and a known network can be used, and may be wired or wireless, for example. The communication network includes, for example, the Internet line, WWW (World Wide Web), telephone line, LAN (Local Area Network), SAN (Storage Area Network), DTN (Delay Tolerant Networking), LPWA (Low Power Wide Area), L5G (local 5G), and the like. Examples of wireless communication include Wi-Fi (registered trademark), Bluetooth (registered trademark), local 5G, and LPWA. The wireless communication may be direct communication between devices (Ad Hoc communication), infrastructure communication, or indirect communication via an access point. The device 10 may be incorporated in a server as a system, for example. Further, the device 10 may be, for example, a control device of an ultrasonic inspection device in which the program of the present invention is installed, a personal computer (PC, for example, desktop type, notebook type), a smart phone, a tablet terminal, or the like. The device 10 may be, for example, in a form of cloud computing, edge computing, or the like, in which at least one of the units is on the server and the other units are on the terminal.

FIG. 2 illustrates a block diagram of the hardware configuration of the device 10. As shown in FIG. The device 10 includes, for example, a CPU 101, a memory 102, a bus 103, a storage device 104, an input device 106, a display (display device) 107, a communication device (communication section) 108, and the like. Each unit of the device 10 is interconnected via a bus 103 by each interface (I/F).

For example, the CPU 101 cooperates with other components by means of a controller (system controller, I/O controller, etc.) and takes charge of overall control of the apparatus 10 . In the device 10, the CPU 101 executes, for example, the program 105 of the present invention and other programs, and reads and writes various information. Specifically, for example, the CPU 101 functions as an ultrasound data acquisition unit 11, a gate setting unit 12, an echo detection unit 13, and an analysis unit . The device 10 includes a CPU as an arithmetic device, but may be provided with other arithmetic devices such as a GPU (Graphics Processing Unit), APU (Accelerated Processing Unit), etc., or may be provided with a combination of these with a CPU. good.

Bus 103 can also be connected to external devices, for example. Examples of the external device include an ultrasonic examination device, an external storage device (external database, etc.), a printer, an external input device, an external display device, an external imaging device, and the like. For example, the device 10 can be connected to an external network (the communication line network) by means of a communication device 108 connected to the bus 103, and can also be connected to other devices via the external network.

The memory 102 is, for example, a main memory (main storage device). When the CPU 101 performs processing, for example, the memory 102 reads various operating programs such as the program 105 of the present invention stored in the storage device 104, which will be described later, and the CPU 101 receives data from the memory 102, Run the program. The main memory is, for example, RAM (random access memory). Also, the memory 102 may be, for example, a ROM (read only memory).

The storage device 104 is also called a so-called auxiliary storage device, for example, in contrast to the main memory (main storage device). As described above, the storage device 104 stores operating programs including the program of the present invention. Storage device 104 may be, for example, a combination of a recording medium and a drive that reads from and writes to the recording medium. The recording medium is not particularly limited, and may be, for example, a built-in type or an external type, and includes HD (hard disk), CD-ROM, CD-R, CD-RW, MO, DVD, flash memory, memory card, and the like. be done. The storage device 104 may be, for example, a hard disk drive (HDD) in which a recording medium and drive are integrated, and a solid state drive (SSD). If the device 10 includes the storage section, for example, the storage device 104 functions as the storage section.

In the device 10, the memory 102 and the storage device 104 store log information, information acquired from an external database (not shown) or an external device, information generated by the device 10, and data stored when the device 10 executes processing. It is also possible to store various information such as information to be used. At least part of the information may be stored in an external server other than the memory 102 and the storage device 104, or may be distributed and stored in a plurality of terminals using blockchain technology or the like. .

The device 10 further includes an input device 106 and a display 107, for example. The input device 106 includes, for example, a touch panel, a track pad, a pointing device such as a mouse; a keyboard; an imaging means such as a camera or scanner; a card reader such as an IC card reader or a magnetic card reader; be done. The display 107 is, for example, a display device such as an LED display or a liquid crystal display. In Embodiment 1, the input device 106 and the display 107 are configured separately, but the input device 106 and the display 107 may be configured integrally like a touch panel display.

Next, an example of the ultrasonic data analysis method of this embodiment will be described based on the flowchart of FIG. The ultrasound data analysis method of the present embodiment is carried out as follows using, for example, the ultrasound data analysis apparatus 10 shown in FIG. 1 or 2 . The ultrasonic data analysis method of this embodiment is not limited to the use of the ultrasonic data analysis apparatus 10 of FIG. 1 or FIG.

First, the ultrasonic data acquisition unit 11 acquires ultrasonic signal data of a cladding tube to be inspected (S1, ultrasonic data acquisition step). Specifically, the ultrasonic data acquisition unit 11 may acquire, for example, ultrasonic signal data from an ultrasonic inspection apparatus of the present invention, which will be described later, or the ultrasonic signal data measured by the ultrasonic inspection apparatus is stored. Alternatively, the ultrasonic signal data may be acquired from an external database or server. In the former case, the ultrasonic data acquisition unit 11 may acquire, for example, ultrasonic signal data received by a probe of an ultrasonic inspection apparatus from the probe, or the probe may be controlled by ultrasonic waves. The ultrasound signal data transmitted to the device may be obtained from the ultrasound controller. Acquisition of the ultrasound signal data may be, for example, wired or wireless.

Next, the gate setting unit 12 sets at least three thickness detection gates (S2, gate setting step). In the present invention, the "gate" is defined, for example, in JIS Z 2300 (non-destructive testing terminology). means range. The thickness detection gate is, for example, a gate set for extracting (detecting) inner surface echoes, outer surface echoes, and multiple echoes, which will be described later, in order to measure the thickness of the cladding tube. The thickness detection gate includes, for example, information about the time range and the intensity threshold of the ultrasound signal data. For the at least three thickness detection gates, for example, mutually overlapping time ranges may be set, or mutually non-overlapping time ranges may be set.

For example, the gate setting unit 12 may arbitrarily set three time ranges as the at least three thickness detection gates. It is preferable to set a time range and a time range in which an external echo is expected to occur as the thickness detection gate. Hereinafter, for example, a thickness detection gate that sets a time range in which an internal echo is expected to occur is referred to as a "first gate", and a thickness detection gate that sets a time range in which a multiple echo is expected to occur is referred to as a "multiple An echo detection gate" and a thickness detection gate that sets a time range in which an external echo is expected to occur are also referred to as a "second gate".

As will be described later, the inner surface echo is, for example, an echo that is received by the ultrasonic transmitter/receiver from an ultrasonic wave that is transmitted from an ultrasonic transmitter/receiver in the cladding tube to be inspected and reflected on the inner surface of the cladding tube. . For this reason, the first gate, for example, based on the thickness of the coating of the cladding tube to be inspected and the sound velocity of the coating material, the ultrasonic waves transmitted from the ultrasonic transmitter/receiver are propagated to the cladding tube, and the inside of the cladding tube Calculate the time range including the time from reflection on the surface (interface between the outer surface of the coating (inner surface side of the cladding tube) and the inner surface of the tubular body of the cladding tube) until it is received by the ultrasonic transmitter/receiver. can be set by The first gate is preferably set, for example, in a time range after a tracking echo detection gate, which will be described later, and before a multiple echo detection gate.

As will be described later, the multiple echoes are, for example, echoes that have been multiple-reflected at the interface between the surface of the coating (center side of the cladding tube) and the outer surface of the coating (inner surface side of the cladding tube). For this reason, the multiple echo detection gate, for example, based on the thickness of the coating of the cladding tube to be inspected and the sound velocity of the coating material, the ultrasonic waves transmitted from the ultrasonic transmitter/receiver propagate to the cladding tube, By calculating the time range including the time required for multiple reflections at the interface between the surface (center side of the cladding tube) and the outer surface of the film (inner surface side of the cladding tube) to be received by the ultrasonic transmitter/receiver. Can be set. Preferably, the multiple echo detection gates are set, for example, in a time range after the first gate and before the second gate. In addition, since the multiple echoes are echoes that are multiple-reflected at the interface between the surface of the film and the outer surface of the film, they are generated at equal intervals from the point of time when the internal echo is generated, based on the echoes reflected on the film surface. do. For this reason, the multiple echoes are n times (n is 2 or more) the difference between the occurrence time of a tracking echo (echo reflected on the surface of the film (center side of the cladding tube)) and the occurrence time of the inner surface echo, which will be described later. (integer) times. For this reason, the multiple echo detection gate is set, for example, for the time at which tracking echoes (echoes reflected by the surface of the film (the center side of the cladding tube) are expected to occur) and the time at which the inner surface echoes are expected to occur. It is preferable that the time range is set to include the time n times the difference of (n is an integer of 2 or more).

As will be described later, the external surface echo is, for example, an echo that is received by the ultrasonic transmitter/receiver from an ultrasonic wave that is transmitted from an ultrasonic transmitter/receiver in the cladding tube to be inspected and reflected on the outer surface of the cladding tube. . For this reason, the second gate is, for example, based on the thickness of the coating of the cladding tube to be inspected and the sound velocity of the coating material, and the thickness of the tube body of the cladding tube to be inspected and the sound velocity of the tube material. It can be set by calculating the time range including the time required for the ultrasonic waves transmitted from the cladding tube to propagate through the cladding tube, reflect on the outer surface of the cladding tube, and be received by the ultrasonic transmitter/receiver. Moreover, it is preferable to set the time range in which the external echo is expected to occur, for example, to a time range after the multiple echo detection gate.

For the thickness detection gate, for example, each time range may be set such that the time after a predetermined time has elapsed from the reference point is the starting point. The reference point is, for example, the position of a tracking echo, which will be described later.

The gate setting unit 12 may be able to set other gates, for example. The other gates include, for example, a gate for detecting the number of rotations of the probe tip (target) of the probe included in the ultrasonic inspection apparatus (for example, also called a target detection gate), a tracking reference gate, and the like. be done. The target detection echo is a gate for detecting an echo (target echo) reflected by the tip of the probe (target) of the probe provided in the ultrasonic inspection apparatus. The tracking reference gate is, for example, a gate for detecting an echo that serves as a reference point when setting the thickness detection gate. The reference point is, for example, an echo reflected from the surface of the film (center side of the cladding tube). The number of gates set by the gate setting unit 12 should include the at least three thickness measurement gates, and for example, the upper limit is not particularly limited. The number of gates is, for example, 3 to 10, 3 to 7, 3 to 5, and the like.

The echo detector 13 detects inner surface echoes, outer surface echoes, and multiple echoes from the ultrasonic signal data based on the thickness measurement gate (S3, echo detection step). Specifically, the echo detection unit 13 detects, for example, the ultrasonic signal crossing the thickness detection gate within the time range set in the thickness detection gate, that is, the time set in the thickness detection gate. An ultrasonic signal (for example, also referred to as a peak) exceeding a predetermined threshold within the range is detected as a thickness detection echo. Next, the echo detector 13 classifies the detected echoes for thickness detection into internal echoes, external echoes, and multiple echoes. Specifically, first, the echo detection unit 13 classifies, for example, the first echo detected by the thickness detection gate as the internal echo. Next, the echo detector 13 classifies the echoes as multiple echoes, for example, when there are echoes at the same interval as the interval from the reference point to the detection time of the internal echo. For example, the reference point may be set arbitrarily, or may be the position of a tracking echo (GS echo), which will be described later. When setting the reference point arbitrarily, for example, it is preferable to set the time at which the coating surface echo is expected to be detected in the cladding tube to be inspected. Further, for example, when echoes that are repeatedly generated at predetermined intervals exist within the thickness detection gate, the echo detector 13 may classify the repeatedly generated echoes as multiple echoes. Then, the echo detection unit 13 classifies, among the echoes detected by the thickness detection gate, echoes that are neither the internal echoes nor the multiple echoes as the external echoes.

The inner surface echo is, for example, an echo that is received by the ultrasonic transmitter/receiver from an ultrasonic wave that is transmitted from an ultrasonic transmitter/receiver and reflected on the inner surface of the cladding tube in the cladding tube to be inspected, and is also referred to as a G1 echo. . The inner surface of the cladding tube is also referred to as, for example, the boundary surface between the base surface on the inner surface of the cladding tube and the outer surface of the coating (inner surface side of the cladding tube).
The multiple echoes are, for example, echoes received by the ultrasonic receiver from ultrasonic waves transmitted from an ultrasonic transmitter/receiver in the cladding tube to be inspected and multiple-reflected in the coating, and are also called G2 echoes. The multiple echoes may be, for example, multiple echoes defined in JIS Z 2300 (non-destructive test terms). In this case, the multiple echoes mean, for example, echoes caused by multiple reflections of ultrasonic pulses repeated between two or more interfaces or flaws. The interface includes, for example, the interface between the surface of the coating (on the center side of the cladding tube) and the outer surface of the coating (on the inner surface side of the cladding tube).
The outer surface echo is, for example, an echo that is received by the ultrasonic transmitter/receiver from the ultrasonic wave that is transmitted from the ultrasonic transmitter/receiver in the cladding tube to be inspected and reflected on the outer surface of the cladding tube, and is also referred to as a B1 echo. .

In S2, when the other gate is set, the echo detector 13 may detect the other echo based on the other gate, for example. Examples of the other echoes include target echoes and tracking echoes. The target echo is, for example, an echo reflected by a probe tip (target) of a probe included in an ultrasonic inspection apparatus. By detecting the target echo by the echo detector 13, the number of revolutions of the tip of the probe can be detected. The tracking echo is, for example, an echo reflected from the surface of the coating (on the center side of the cladding tube) of the cladding tube to be inspected. By detecting the tracking echo by the echo detection unit 13, for example, the start point of the time range of the thickness detection gate can be kept constant (tracked) using the detection time of the tracking echo as a reference point. .

The analysis unit 14 analyzes the thickness of the pipe to be inspected based on the inner surface echo, the outer surface echo, and the multiple echoes (S4, analysis step). The "thickness of the tube to be inspected" means, for example, the thickness of the tubular body of the tube to be inspected, that is, the thickness of the entire tube to be inspected, excluding the thickness of the film. Specifically, the analysis unit 14, for example, for the time difference between the inner surface echo and the multiple echo and the time difference between the multiple echo and the outer surface echo, the sound velocity (longitudinal wave) corresponding to the material of the cladding tube By multiplying by , the thickness of the tube to be inspected can be analyzed. An example of sound velocity corresponding to the material of the cladding tube is shown in Table 1 below, but the present invention is not limited to the table below, and the sound velocity corresponding to the material of the coating and tube body of the cladding tube to be inspected is appropriately referred to. can. Information on the speed of sound corresponding to the material of the cladding tube may be stored, for example, in the storage device 104 or memory 102 of the apparatus 10, or may be stored in an external server or database. In the latter case, for example, the communication device 108 may acquire the speed-of-sound information via a communication network.

The analysis unit 14 may change the thickness analysis method, for example, based on the echo detection order. Specifically, for example, when the multiple echoes are detected after the outer surface echo, the analysis unit 14 multiplies the time difference between the inner surface echo and the outer surface echo by the sound velocity corresponding to the material of the cladding tube. Thus, the thickness of the tube to be inspected can be analyzed. Further, when the multiple echoes are detected prior to the external echo, the time difference between the internal echo and the multiple echoes and the time difference between the multiple echoes and the external echo may vary depending on the material of the cladding tube. By multiplying the corresponding sound velocities, the thickness of the tube to be inspected can be analyzed. According to such processing, for example, the thickness of various cladding tubes can be analyzed regardless of the combination of the thickness of the coating and the thickness of the tubular body of the cladding tube.

For example, based on the analyzed thickness of the pipe to be inspected, the analysis unit 14 determines whether there is a flaw in the pipe to be inspected, the length from the end of the pipe to the location of the flaw, the length of the flaw, the probe It may be possible to analyze the directions of flaws and the like centering on the device, that is, to detect flaws. The flaw detection can be analyzed, for example, by specifying the position and location of the portion where the thickness is thin based on the thickness.

In the ultrasonic data analysis method of the present embodiment, the case where S1 to S4 are sequentially executed has been described as an example, but the present invention is not limited to this. In the present invention, S1 to S4 may be performed simultaneously or separately, for example. In the latter case, the order of execution is not particularly limited and is arbitrary.

According to the ultrasonic data analysis apparatus of the present embodiment, the gate setting unit sets at least three thickness detection gates, and the echo detection unit detects the inner surface from the ultrasonic signal data based on the thickness measurement gates. An echo, an external echo, and multiple echoes can be detected, and the analysis unit can analyze the thickness of the tube to be inspected based on the internal echo, the external echo, and the multiple echo. Therefore, according to the ultrasonic data analysis apparatus of the present embodiment, it is possible to measure the thickness of a cladding tube having a film formed on its inner surface while suppressing the influence of noise.

[Embodiment 2]
This embodiment is the same as the ultrasound data analysis apparatus 10 of Embodiment 1, except that in addition to the configuration of the ultrasound data analysis apparatus 10 of Embodiment 1, a mapping unit, an image generation unit, and a display unit are included. Yes, the explanation can be used. The ultrasound data analysis apparatus of the present embodiment includes, for example, a mapping unit, an image generation unit, and a display unit, and the mapping unit maps part or all of the inner wall of the pipe to generate a pipe inner wall map. The image generator superimposes the ultrasonic signal data on the pipe inner wall map to generate a pipe inner wall map ultrasonic echo image, and the display unit displays the pipe inner wall map ultrasonic echo image.

FIG. 4 is a block diagram showing an example configuration of the ultrasound data analysis apparatus 10A of this embodiment. As shown in FIG. 4, the ultrasound data analysis apparatus 10A includes a mapping unit 15, an image generation unit 16, and a display unit 17 in addition to the configuration of the ultrasound data analysis apparatus 10 of the first embodiment. The hardware configuration of the ultrasound data analysis apparatus 10A is that the CPU 101 replaces the configuration of the ultrasound data analysis apparatus 10 in FIG. 1 with the ultrasound data analysis apparatus 10 in FIG. It is the same except that it includes the configuration of the data analysis device 10A.

Next, the ultrasonic data analysis method of this embodiment will be described with reference to the flowchart of FIG. The ultrasound data analysis method of the present embodiment can be implemented using, for example, the ultrasound data analysis apparatus 10A of the present embodiment shown in FIG. The ultrasound data analysis method of the present invention is not limited to use of the ultrasound data analysis apparatus 10A. Further, in the present embodiment, a glass-lined tube whose inner surface is lined with glass will be described as an example of the cladding tube to be measured, but the present invention is not limited to the following description. Further, in the following description, for example, the tracking echo detection gate is set as another gate in the step S2, and the tracking echo is detected in the step S3. However, as described above, the setting of the tracking echo detection gate and the detection of tracking echoes are optional in the present invention.

First, S1 to S4 are performed in the same manner as S1 to S4 in the ultrasonic data analysis method of the first embodiment.

Next, the mapping unit 15 maps part or all of the inner wall of the pipe to generate a pipe inner wall map (S5, mapping step). Specifically, the mapping unit 15 may generate, for example, a pipe cross-section map obtained by mapping a pipe cross-section perpendicular to the axial direction of the pipe. Processing by the mapping unit 15 will be described with reference to FIG. FIG. 6A is a schematic diagram showing a cross section of the cladding tube 2 to be inspected. For example, the mapping unit 15 develops 200 measurement points from the measurement point 1 to the measurement point 200 in the circumferential direction of the cladding tube 2 based on the virtual cut plane 2c indicated by the dashed line in FIG. A pipe cross-section map as shown in 6(B) is generated. Note that the number of measurement points is arbitrary and is not limited to this.

Next, the image generator 16 superimposes the ultrasonic signal data on the pipe inner wall map (pipe cross-sectional map) to generate a pipe inner wall map ultrasonic echo image (S6, image generating step). FIG. 7 shows an example of a pipe inner wall map ultrasonic echo image generated by the image generator 16. As shown in FIG. In FIG. 7, (A) shows an example of an ultrasonic signal data image (also referred to as A scope) at the measurement points, and (B) shows ultrasonic signal data at a plurality of measurement points superimposed on the pipe inner wall map. 1 shows an example of the pipe inner wall map ultrasonic echo image (also referred to as B scope). In FIGS. 7A and 7B, reference numeral 161 indicates the tracking echo (echo on the coating surface), reference numeral 162 indicates the inner surface echo, reference numeral 163 indicates the multiplex echo, and reference numeral 164 indicates the , indicating the external echo. In FIG. 7B, reference numeral 165 indicates the time difference between the tracking echo and the internal echo, that is, the thickness of the film (glass). Reference numeral 166 indicates the time difference between the inner surface echo and the multiple echoes, reference numeral 167 indicates the time difference between the multiple echoes and the outer surface echo, and reference numeral 168 indicates the thickness of the tube to be inspected. Since the ultrasonic data analysis apparatus 10A of the present embodiment can generate, for example, a pipe inner wall map ultrasonic echo image as shown in FIG. 7B, the thickness of the pipe to be inspected can be checked more intuitively.

For example, when the analysis unit 14 changes the thickness analysis method based on the echo detection order, the image generation unit 16 generates different pipe inner wall map ultrasonic echo images according to the analysis method. good too. FIG. 8 shows an example of the different pipe inner wall map ultrasonic echo images. 8A and 8B, the upper diagram is a schematic diagram showing an example of ultrasonic signal data, and the lower diagram is a schematic diagram showing an example of the pipe inner wall map ultrasonic echo. FIG. 8(A) is an example of the pipe inner wall map ultrasonic echo image when the multiple echoes are detected after the outer surface echo, and FIG. is an example of the pipe inner wall map ultrasonic echo image in the case where . In FIGS. 8A and 8B, thinned portions of the tubular body are indicated by hollow arrows. The ultrasonic data analysis apparatus 10A of the present embodiment can generate, for example, pipe inner wall map ultrasonic echo images as shown in FIGS. The thickness of the pipe to be inspected can be checked more intuitively regardless of the combination of

Then, the display unit 17 displays the pipe inner wall map ultrasonic echo image (S7, display step). For example, the display unit 17 may display the pipe inner wall map ultrasonic echo image (B scope) on the display 107 of the ultrasonic data analysis device 10A, or display the pipe inner wall map ultrasonic echo image on a display device outside the device. An echo image may be displayed. Examples of the display device outside the apparatus include a monitor provided in the ultrasonic inspection apparatus, an external display, and the like. Further, the display unit 17 may be capable of displaying, for example, an ultrasonic signal data image (A scope) at the measurement point. Since the ultrasonic data analysis apparatus 10A of the present embodiment can display the pipe inner wall map ultrasonic echo image on the display unit 17, the thickness of the cladding pipe can be checked more intuitively. Also, as shown in FIGS. 8A and 8B, it is possible to more easily find the thinned portion of the cladding tube.

In the ultrasonic data analysis method of the present embodiment, the case where S1 to S7 are sequentially executed has been described as an example, but the present invention is not limited to this. In the present invention, S1 to S7 may be executed simultaneously or separately, for example. In the latter case, the order of execution is not particularly limited and is arbitrary.

The ultrasonic data analysis apparatus of the present embodiment can generate and display the pipe inner wall map ultrasonic echo image obtained by analyzing the ultrasonic signal data, so that, for example, more detailed analysis of the ultrasonic data is possible.

[Embodiment 3]
Embodiment 3 describes an ultrasonic inspection apparatus of the present invention. The ultrasonic inspection apparatus of the present invention includes, for example, an ultrasonic data analysis unit, and the ultrasonic data analysis unit is the ultrasonic data analysis apparatus of the present invention, and other configurations are not particularly limited. .

The ultrasonic inspection apparatus of the present invention may include, for example, various members provided in known ultrasonic inspection apparatuses. Said members include, for example, probes, liquid pumps, ultrasonic controllers, lead cables, and ultrasonic cables. FIG. 9 shows a schematic diagram of an example of the configuration of the ultrasonic inspection apparatus of this embodiment. As shown in FIG. 9, the ultrasonic inspection apparatus 20 of the present embodiment includes an ultrasonic data analysis unit (ultrasonic data analysis apparatus) 10, a probe device 21, a liquid pump 22, an ultrasonic control device 23, a lead cable 24 , and an ultrasound cable (not shown).

The liquid pump 22 can send liquid (for example, water) to the rear end of the tubular container 211 of the probe 21 shown in FIG. 10 through the lead cable 24, for example. Specifically, the liquid pump 22 can pump the liquid by, for example, increasing the water pressure.

The lead cable 24 is, for example, a cable for connecting the liquid pump 22 and the probe 21, and the ultrasonic control device 23 and the probe 21. The ultrasonic cable is inserted through the lead cable 24. . The ultrasound control device 23 and the probe 212 are connected by the ultrasound cable. The lengths of the lead cable 24 and the ultrasonic cable are not particularly limited, and can be appropriately set according to the length of the tube to be inspected.

The ultrasonic control device 23 is, for example, a device that controls transmission and reception of ultrasonic waves by the probe device 21, and a control signal of the ultrasonic control device 23 is transmitted to the probe 212 by the ultrasonic cable. Transmission and reception of ultrasound by child 212 is controlled.

The ultrasound control device 23 and the ultrasound data analysis device 10 are, for example, mutually connectable devices. The connection between the ultrasound control device 23 and the ultrasound data analysis device 10 may be wired or wireless, for example. The wireless connection includes, for example, communication via a communication network. The communication network is, for example, as described above.

The ultrasonic data analysis device 10 is the ultrasonic data analysis device of the present invention, and analyzes the ultrasonic signal data received by the probe 212 and transmitted to the ultrasonic control device 23 .

The probe device 21 is not particularly limited, and for example, a known probe device can be used. A configuration of an example of the probe will be described with reference to FIGS. 10 and 11. FIG. FIG. 10 is a schematic diagram showing an example of the configuration of the probe device 21. As shown in FIG. The probe 21 includes a probe body and a probe tip. The probe main body includes a tubular container 211 and a probe 212, as shown in FIG. A probe 212 is accommodated inside the tubular container 211 . Cylindrical container 211 has a front end on the insertion direction side into the tube and a rear end on the side opposite to the front end. The probe tip includes a reflecting mirror 213 and a rotating mechanism 214 .

The size of the tip portion of the probe and the cylindrical container 211 is not particularly limited as long as it can be inserted into the tube 2 to be inspected. The tube 2 to be inspected is, for example, the cladding tube. In the pipe 2 shown in FIG. 10, reference numeral 2a indicates a bare cross section of the pipe, and reference numeral 2b indicates a coating cross section inside the pipe 2. As shown in FIG.

FIG. 11(a) is a schematic diagram showing an example of a liquid flow. As shown in FIG. 11A, a channel is formed between the probe 212 and the inner wall of the cylindrical container 211 through which the liquid 3 can flow. In the channel, the liquid 3 can flow from the rear end toward the front end. The liquid 3 is, for example, water, although not particularly limited. The liquid 3 is sent from the liquid pump 22 to the rear end of the cylindrical container 211 through the lead cable 24, for example, as described above. For example, the inside of the tube 2 to be inspected may be filled with the liquid 3 in advance, or may be filled with the liquid 3 by liquid feeding by the liquid pump 22 .

The probe 212 can transmit and receive ultrasonic waves. The frequency of the ultrasonic waves can be appropriately set according to the types of pipe 2 and liquid 3 to be inspected.

The reflecting mirror 213 is capable of reflecting the ultrasonic waves transmitted from the probe 212 and emitting the ultrasonic waves in the direction perpendicular to the inner wall of the pipe 2 to be inspected, and the film 2b of the pipe 2 to be inspected. Ultrasonic waves reflected by the surface, the inner surface of the tubular body 2a (the inner wall of the tube 2), the outer surface of the tubular body 2a, etc., the surface of the coating 2a (the center side of the coating tube), and the outer surface of the coating 2a (coating The ultrasonic wave multiple-reflected at the boundary surface (inner surface side of the pipe 2) can be reflected and made incident on the probe 212 . The reflecting mirror 213 is rotatably attached to the tip of the cylindrical container 211 by a rotating mechanism 214 . The angle of the reflecting mirror 213 is not particularly limited and can be set as appropriate.

The rotating mechanism 214 can rotate the reflecting mirror 213 using the flow of the liquid 3 in the channel as a driving force. FIG. 11B is a schematic diagram showing an example of the configuration of the reflecting mirror 213 and the rotating mechanism 214. As shown in FIG. As shown in FIG. 11(b), the rotating mechanism 214 includes, for example, a cylindrical rotating body 214a and a plate-like rotating body 214b. The cylindrical rotating body 214a has a front end on the insertion direction side in the tube 2 to be inspected and a rear end on the side opposite to the front end. The reflecting mirror 213 is arranged at the tip of the cylindrical rotating body 214a. The plate-shaped rotating body 214b is arranged at the rear end portion of the cylindrical rotating body 214a. The cylindrical rotating body 214a is rotatably attached to the tip portion of the cylindrical container via a plate-like rotating body 214b. The plate-like rotor 214b has a groove (not shown). In the groove, the liquid 3 can flow from the tip of the tubular container 211 toward the tip of the tubular rotor 214a. A discharge hole for the liquid 3 is formed in a side portion of the cylindrical rotating body 214a. That is, the liquid 3 sent to the rear end portion of the cylindrical container 211 flows through the channel and the groove of the plate-shaped rotating body 214b. The plate-like rotating body 214b rotates with the driving force of the liquid 3 flowing through the groove, and the cylindrical rotating body 214a rotates in conjunction therewith. The direction of rotation may be, for example, clockwise or counterclockwise. The cylindrical rotating body 214a and the plate-like rotating body 214b may be integrally molded.

As shown in FIG. 11(b), the rotating mechanism 214 may further include a bearing 214c and a fixture 214d, for example. The bearing 214c is arranged, for example, in contact with the tubular container 211, the tubular rotating body 214a, and the plate-shaped rotating body 214b. 214 d of fixing jigs are arrange|positioned in contact with the cylindrical container 211, the bearing 214c, and the cylindrical rotating body 214a, for example. The bearing 214c and the fixing jig 214d are not particularly limited as long as they can fix and support the cylindrical rotor 214a to the tip of the cylindrical container 211 .

[Embodiment 4]
Next, the ultrasonic inspection method of the present invention will be described. The ultrasonic inspection method of the present invention is, for example, an ultrasonic inspection method for inspecting the thickness of a cladding tube with ultrasonic waves, which includes an ultrasonic data analysis step, and the ultrasonic data analysis step includes the ultrasonic wave of the present invention. It is characterized by being an acoustic wave data analysis method, and other processes and conditions are not limited at all.

The ultrasonic inspection method of the present invention can be implemented, for example, using the ultrasonic data analysis apparatus of the present invention or the ultrasonic inspection apparatus of the present invention. It is not limited to the method using the data analysis device or the ultrasonic inspection device of the present invention. An example of the ultrasonic inspection method of this embodiment will be described below with reference to the drawings, but the present invention is not limited to the following example.

First, as shown in FIG. 12, an ultrasonic transmitter/receiver is inserted into the pipe 2 to be inspected. The ultrasonic transmitter/receiver is not particularly limited as long as it can transmit and receive ultrasonic waves. The ultrasonic transmitter/receiver is hereinafter referred to as the probe device 21 . The probe device 21 is preferably inserted centrally within the tube 2, for example. A fluid 3 is filled in the tube 2 to be examined. Next, ultrasonic waves 4 are transmitted from the probe 21 to the inner wall of the tube 2 in the vertical direction while being rotated in the circumferential direction of the tube 2 . Then, the reflection of the transmitted ultrasonic wave 4 is received by the probe device 21 . The probe device 21 then transmits the obtained ultrasonic signal data to the ultrasonic control device 23 via the lead cable 24 . Then, the ultrasonic control device 23 transmits the received ultrasonic signal data to the ultrasonic data analysis device 10, and the ultrasonic data analysis device 10 analyzes the ultrasonic signal data acquired from the ultrasonic control device 23. do. Analysis of ultrasonic signal data by the ultrasonic data analysis apparatus 10 is, for example, as described above in the first and second embodiments.

Further, in the ultrasonic inspection method of the present embodiment, for example, as shown in FIG. It may be transmitted while being rotated in the circumferential direction.

As described above, the ultrasonic inspection method of the present embodiment analyzes the obtained ultrasonic signal data by the ultrasonic data analysis method of the present invention. Therefore, according to the ultrasonic inspection method of the present embodiment, for example, even in a cladding tube having a film formed on the inner surface, it is possible to perform thickness measurement or flaw detection while suppressing the influence of noise.

[Embodiment 5]
A first program of the present embodiment is a program for causing a computer to execute each step of the above-described ultrasonic data analysis method. Specifically, the first program of this embodiment is a program for causing a computer to execute an ultrasound data acquisition procedure, a gate setting procedure, an echo detection procedure, and an analysis procedure.

The ultrasonic data acquisition procedure acquires ultrasonic signal data of the cladding tube to be inspected,
The gate setting procedure sets at least three thickness measurement gates;
The echo detection procedure detects an inner surface echo, an outer surface echo, and multiple echoes from the ultrasonic signal data based on the thickness measurement gate, and the analysis procedure detects the inner surface echo, the outer surface echo, and the Based on the multiple echoes, the thickness of the tube to be inspected is analyzed.

The first program of the present embodiment can also be said to be a program that causes a computer to function as an ultrasound data acquisition procedure, a gate setting procedure, an echo detection procedure, and an analysis procedure.

The description of the ultrasonic data analysis apparatus and ultrasonic data analysis method of the present invention can be used for the first program of the present embodiment. For each procedure described above, for example, "procedure" can be read as "processing". Moreover, the program of this embodiment may be recorded on a computer-readable recording medium, for example. The recording medium is, for example, a non-transitory computer-readable storage medium. The recording medium is not particularly limited, and examples thereof include random access memory (RAM), read-only memory (ROM), hard disk (HD), optical disk, floppy (registered trademark) disk (FD), and the like.

[Embodiment 6]
A second program of the present embodiment is a program for causing a computer to execute each step of the ultrasonic inspection method described above. Specifically, the second program of the present embodiment is a program for causing a computer to execute an ultrasonic inspection procedure for inspecting the thickness of a cladding tube using ultrasonic waves. A data analysis procedure is included, and the ultrasonic data analysis means is executed by the first program of the present invention.

The second program of the present embodiment can also be said to be a program that causes a computer to function as an ultrasonic examination procedure.

The description of the ultrasonic inspection apparatus and ultrasonic inspection method of the present invention can be used for the second program of the present embodiment. For each procedure described above, for example, "procedure" can be read as "processing". Moreover, the program of this embodiment may be recorded on a computer-readable recording medium, for example. The recording medium is, for example, a non-transitory computer-readable storage medium. The recording medium is not particularly limited, and examples thereof include random access memory (RAM), read-only memory (ROM), hard disk (HD), optical disk, floppy (registered trademark) disk (FD), and the like.

Although the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments. Various changes can be made to the configuration and details of the present invention within the scope of the present invention that can be understood by those skilled in the art.

According to the present invention, it is possible to measure the thickness of a cladding tube having a film formed on its inner surface. Therefore, the present invention is useful in various fields such as inspection, maintenance and inspection of piping.

10, 10A Ultrasound data analysis device 11 Ultrasound data acquisition unit 12 Gate setting unit 13 Echo detection unit 14 Analysis unit 15 Mapping unit 16 Image generation unit 17 Display unit 101 CPU
102 memory 103 bus 104 storage device 105 program 106 input device 107 display 108 communication device 20 ultrasonic inspection device 2 coating tube 2a tube 2b to be inspected coating 3 liquid (water)
4 Ultrasonic wave 21 Probing device 22 Pump 23 Ultrasonic control device 24 Lead cable 211 Cylindrical container 212 Probe 213 Reflecting mirror 214 Rotation mechanism 214a Cylindrical rotating body 214b Plate-like rotating body 214c Bearing 214d Fixing jig

Claims (18)

including an ultrasound data acquisition unit, a gate setting unit, an echo detection unit, an analysis unit,
The ultrasonic data acquisition unit acquires ultrasonic signal data of the cladding tube to be inspected,
The gate setting unit sets at least three thickness measurement gates,
The echo detection unit detects an inner surface echo, an outer surface echo, and multiple echoes from the ultrasonic signal data based on the thickness measurement gate,
The ultrasonic data analysis device, wherein the analysis unit analyzes the thickness of the pipe to be inspected based on the inner surface echo, the outer surface echo, and the multiple echoes. The analysis unit is
analyzing the thickness of the cladding tube based on the time difference between the inner surface echo and the outer surface echo when the multiple echoes are detected after the outer surface echo;
When the multiple echo is detected before the external echo, the thickness of the cladding tube is analyzed based on the time difference between the internal echo and the multiple echo and the time difference between the multiple echo and the external echo. The ultrasound data analysis system of claim 1. including a mapping unit, an image generation unit, and a display unit;
The mapping unit maps part or all of the inner wall of the pipe to generate a pipe inner wall map,
The image generating unit generates a pipe inner wall map ultrasonic echo image by superimposing the ultrasonic signal data on the pipe inner wall map,
The display unit displays the pipe inner wall map ultrasonic echo image,
The ultrasonic data analysis apparatus according to claim 1 or 2. The mapping unit maps a pipe cross-section perpendicular to the axial direction of the pipe to generate a pipe cross-section map,
The image generating unit generates a vascular cross-sectional map ultrasonic echo image by superimposing the ultrasonic signal data on the vascular cross-sectional map,
The display unit displays the pipe cross-section map ultrasonic echo image,
The ultrasonic data analysis apparatus according to claim 3. including an ultrasound data analysis unit,
An ultrasonic examination apparatus, wherein the ultrasonic data analysis unit is the ultrasonic data analysis apparatus according to any one of claims 1 to 4. including probes, liquid pumps, ultrasonic controllers, lead cables, and ultrasonic cables;
The probe includes a probe body and a probe tip,
The probe main body includes a cylindrical container and a probe,
The cylindrical container has a size that can be inserted into a pipe to be inspected,
The cylindrical container has a front end on the insertion direction side into the tube and a rear end on the opposite side to the front end,
The probe is housed inside the cylindrical container,
A channel through which a liquid can flow is formed between the probe and the inner wall of the cylindrical container,
In the channel, the liquid can flow from the rear end toward the front end,
The probe is capable of transmitting and receiving ultrasonic waves,
The tip of the probe has a size that can be inserted into the tube,
The probe tip includes a reflecting mirror and a rotating mechanism,
The reflecting mirror can reflect the ultrasonic waves transmitted from the probe and emit the ultrasonic waves in a direction perpendicular to the inner wall of the tube, and can reflect the ultrasonic waves reflected by the inner wall of the tube. can be reflected and incident on the probe,
The reflecting mirror is rotatably attached to the tip of the cylindrical container by the rotating mechanism,
The rotating mechanism can rotate the reflecting mirror using the flow of the liquid in the channel as a driving force,
The liquid pump is capable of sending the liquid to the rear end portion of the tubular container of the probe device through the lead cable,
The ultrasonic cable is inserted through the lead cable,
The ultrasonic cable connects the ultrasonic control device and the probe,
Transmission and reception of ultrasonic waves by the probe is controlled by the ultrasonic control device,
The ultrasonic control device and the ultrasonic data analysis unit are connected,
6. The ultrasonic inspection apparatus according to claim 5, wherein said ultrasonic data analysis unit analyzes ultrasonic signal data received by said probe and transmitted to said ultrasonic controller. 7. The ultrasonic inspection apparatus according to claim 5 or 6, which is for inspecting a cladding tube. Including ultrasound data acquisition process, gate setting process, echo detection process, analysis process,
The ultrasonic data acquisition step acquires ultrasonic signal data of the cladding tube to be inspected,
The gate setting step sets at least three gates for thickness measurement,
The echo detection step detects an inner surface echo, an outer surface echo, and multiple echoes from the ultrasonic signal data based on the thickness measurement gate,
The ultrasonic data analysis method, wherein the analyzing step analyzes the thickness of the pipe to be inspected based on the inner surface echo, the outer surface echo, and the multiple echoes. The analysis step includes
analyzing the thickness of the cladding tube based on the time difference between the inner surface echo and the outer surface echo when the multiple echoes are detected after the outer surface echo;
When the multiple echo is detected before the external echo, the thickness of the cladding tube is analyzed based on the time difference between the internal echo and the multiple echo and the time difference between the multiple echo and the external echo. 9. The ultrasound data analysis method according to claim 8. including a mapping step, an image generation step, and a display step;
The mapping step generates a pipe inner wall map by mapping one step or all steps of the inner wall of the pipe based on the ultrasonic signal data;
The image generating step includes superimposing the ultrasonic signal data on the pipe inner wall map to generate a pipe inner wall map ultrasonic echo image,
The display step displays the pipe inner wall map ultrasonic echo image.
The ultrasonic data analysis method according to claim 8 or 9. In the mapping step, a pipe cross-section map is generated by mapping a pipe cross-section perpendicular to the axial direction of the pipe;
The image generating step includes superimposing the ultrasonic signal data on the pipe cross-section map to generate a pipe cross-section map ultrasonic echo image,
The display step displays the pipe cross-section map ultrasonic echo image.
The ultrasonic data analysis method according to claim 10. An ultrasonic inspection method for ultrasonically inspecting the thickness of a cladding tube,
including an ultrasound data analysis step;
An ultrasonic examination method, wherein the ultrasonic data analysis step is the ultrasonic data analysis method according to any one of claims 8 to 11. A program for causing a computer to execute an ultrasound data acquisition procedure, a gate setting procedure, an echo detection procedure, and an analysis procedure,
The ultrasonic data acquisition procedure acquires ultrasonic signal data of the cladding tube to be inspected,
The gate setting procedure sets at least three thickness measurement gates;
The echo detection procedure detects internal echoes, external echoes, and multiple echoes from the ultrasonic signal data based on the thickness measurement gates;
A program in which the analysis procedure analyzes the thickness of the tube to be inspected based on the inner surface echo, the outer surface echo, and the multiple echoes. The analysis procedure is
analyzing the thickness of the cladding tube based on the time difference between the inner surface echo and the outer surface echo when the multiple echoes are detected after the outer surface echo;
When the multiple echo is detected before the external echo, the thickness of the cladding tube is analyzed based on the time difference between the internal echo and the multiple echo and the time difference between the multiple echo and the external echo. 14. The program according to claim 13. including a mapping procedure, an image generation procedure, and a display procedure;
wherein the mapping step maps one or all steps of the inner wall of the pipe based on the ultrasound signal data to generate a map of the inner wall of the pipe;
The image generating procedure includes superimposing the ultrasonic signal data on the pipe inner wall map to generate a pipe inner wall map ultrasonic echo image,
The display step displays the pipe inner wall map ultrasonic echo image.
15. The program according to claim 13 or 14. The mapping step generates a pipe cross-section map by mapping a pipe cross-section perpendicular to the axial direction of the pipe;
The image generation procedure includes superimposing the ultrasonic signal data on the pipe cross-section map to generate a pipe cross-section map ultrasonic echo image,
The display step displays the pipe cross-section map ultrasonic echo image.
16. A program according to claim 15. A program for causing a computer to execute an ultrasonic inspection procedure for ultrasonically inspecting the thickness of a cladding tube,
The ultrasound examination procedure includes an ultrasound data analysis procedure,
A program, wherein the ultrasound data analysis procedure is executed by the program according to any one of claims 13 to 16. A computer-readable recording medium recording the program according to any one of claims 13 to 17.

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