Cavity detection device and method

Abstract

The invention discloses a cavity detection device and method, and relates to the technical field of cavity detection.The cavity detection device comprises a detection structure, a coupling structure and a marking structure, the detection structure is a bag type array ultrasonic detection structure, and the bag type array ultrasonic detection structure comprises a plurality of ultrasonic probes arranged in sequence; the ultrasonic probe is used for detecting whether a cavity exists or not, the coupling structure is used for conveying a coupling medium to the ultrasonic probe to enable the ultrasonic probe to be attached to a to-be-detected structure, and the marking structure is used for marking the position of the cavity when it is detected that the cavity exists. Through the ultrasonic probe, the to-be-detected structure is subjected to omnibearing detection, and the position of the cavity is marked.

Description

Technical Field

[0001] The present invention relates to the technical field of cavity detection, and in particular to a cavity detection device and method. Background Art

[0002] In the existing pumped storage power station projects, during the design process, the method of sharing pressure between steel pipes and surrounding concrete is adopted. In this case, if a large gap is formed between the steel pipe and the concrete, the steel pipe alone will bear the internal pressure, which will cause the steel pipe to be stressed and deformed unevenly, and even cause the steel pipe to break, resulting in serious production safety accidents.

[0003] The manual tapping method is a commonly used inspection method for large-diameter pipelines. It uses a hammer or other iron device to tap the surface of the steel pipe, and uses the echo obtained after the tapping to determine whether there is a cavity and the depth of the cavity. The manual tapping inspection method has many disadvantages. Since the inspection process mainly depends on the subjective judgment of the workers, the inspection accuracy is low. Summary of the invention

[0004] The purpose of the present invention is to provide a cavity detection device and method to solve the problems existing in the above-mentioned prior art. By using an ultrasonic probe, the structure to be detected is fully detected and the cavity position is marked.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a cavity detection device, comprising: a detection structure, a coupling structure and a marking structure, wherein the detection structure is a capsule array ultrasonic detection structure, wherein the capsule array ultrasonic detection structure comprises a plurality of ultrasonic probes arranged in sequence, wherein the ultrasonic probe is used to detect whether a cavity exists, wherein the coupling structure is used to transport a coupling medium to the ultrasonic probe so that the ultrasonic probe and a structure to be detected fit together, and wherein when the existence of a cavity is detected, the marking structure is used to mark the position of the cavity.

[0007] Preferably, the plurality of ultrasound probes are located in the same plane, and the distances between adjacent ultrasound probes are the same.

[0008] Preferably, the distance between adjacent ultrasound probes is less than 0.5 m.

[0009] Preferably, the coupling structure includes a storage structure and a plurality of coupling medium pipelines, the storage structure is used to hold the coupling medium, the coupling medium pipelines correspond one-to-one to the ultrasonic probes, one end of the coupling medium pipeline is connected to the storage structure, the other end of the coupling medium pipeline corresponds to the position of the ultrasonic probe, and a water pump and a valve are provided on the coupling medium pipeline.

[0010] Preferably, the marking structure includes a plurality of paint spray bottles, which correspond one to one with the ultrasonic probe, the nozzle of the paint spray bottle is connected to one end of a paint spray pipeline, the other end of the paint spray pipeline corresponds to the position of the ultrasonic probe, the paint spray bottle presses the spray head through a telescopic rod to spray paint, and the marking paint in the paint spray bottle passes through the spray head and the paint spray pipeline and is sprayed on the cavity position of the structure to be measured.

[0011] Preferably, it also includes a mileage wheel, which is used to record the detection mileage of the ultrasonic probe.

[0012] Preferably, each of the ultrasonic probes corresponds to a universal wheel structure, and the universal wheel structure is used to contact the surface of the structure to be detected.

[0013] Preferably, a storage and acquisition system is integrated in the detection structure;

[0014] The storage and acquisition system is connected to the mileage wheel; the storage and acquisition system is also connected to the host computer;

[0015] The storage and acquisition system is used to obtain odometer wheel data; the odometer wheel data includes the cumulative number of positive rotations and the cumulative number of reverse rotations of the odometer wheel at any time;

[0016] The storage and acquisition system is also used to obtain multiple ultrasonic callback signals; the ultrasonic callback signals correspond to the ultrasonic probes one by one; the ultrasonic callback signals are collected after the ultrasonic signals emitted by the corresponding ultrasonic probes are reflected by the pipe wall or the object behind the pipe wall cavity;

[0017] The storage and acquisition system is used to transmit the mileage wheel data and the ultrasonic callback signal to the host computer.

[0018] Preferably, it also includes a power supply system section;

[0019] The power supply system node is respectively connected to the ultrasonic probe, the paint spray bottle and the storage and acquisition system.

[0020] A cavity detection method is applied to the cavity detection device, and the cavity detection method comprises:

[0021] Obtaining an ultrasonic callback signal corresponding to any ultrasonic probe at the current moment as a current ultrasonic callback signal;

[0022] Determine whether the current ultrasonic callback signal reaches a preset ultrasonic callback signal risk value, and obtain a determination result;

[0023] If the judgment result is yes, the odometer wheel data at the current moment is obtained; the odometer wheel data includes the cumulative number of positive rotations and the cumulative number of reverse rotations of the odometer wheel at any moment;

[0024] According to the odometer data at the current moment, determine that the position of the cavity detection device at the current moment is the cavity position, and send the current moment and the cavity position to the storage and acquisition system;

[0025] Generate a cavity alarm signal and a paint spraying signal, and send the paint spraying signal to the paint spraying bottle corresponding to the current ultrasonic callback signal;

[0026] Update the current ultrasonic callback signal, and return to the step of "determining whether the current ultrasonic callback signal reaches the preset ultrasonic callback signal risk value, and obtaining the determination result" until the ultrasonic callback signals corresponding to all ultrasonic probes at the current moment are traversed;

[0027] Update the current time, and return to the step of "obtaining the ultrasonic callback signal corresponding to any ultrasonic probe at the current time as the current ultrasonic callback signal".

[0028] Compared with the prior art, the present invention has achieved the following technical effects:

[0029] The present invention adopts a capsule array ultrasonic detection structure to perform cavity detection, and transmits a coupling medium to the ultrasonic probe through a coupling structure, so that the ultrasonic probe is fully coupled with the structure to be detected, thereby ensuring the sensitivity of ultrasonic probe detection and the stability of the coupling environment, and adopts a marking structure to mark the cavity position, thereby solving the complex cavity detection problem in ultra-large diameter pipelines and ensuring the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 Axonometric measurement of the cavity detection device of the present invention Figure 1 ;

[0032] Figure 2 Axonometric measurement of the cavity detection device of the present invention Figure 2 ;

[0033] Figure 3 It is a top view of the cavity detection device of the present invention;

[0034] Figure 4 It is a schematic diagram of the detection principle of the cavity detection device of the present invention;

[0035] Figure 5 It is a schematic diagram of the relationship between the cavity detection device of the present invention and the host computer;

[0036] Figure 6 It is a schematic diagram of a detection pipeline of a cavity detection device of the present invention;

[0037] Figure 7 It is a schematic diagram of the cross section of the detection area of ​​the pipeline;

[0038] Figure 8 This is a schematic diagram of the detection area of ​​the pipeline;

[0039] Fig. 9 Open a plan view of the inspection area of ​​the pipeline;

[0040] Fig.10 It is a module connection diagram of the cavity detection device of the present invention;

[0041] Fig.11 This is a basic principle diagram of the acquisition and storage system of the present invention;

[0042] Fig.12 It is the principle diagram of the alarm circuit of the present invention;

[0043] Fig.13 This is a flow chart of the cavity detection method of the present invention.

[0044] In the figure: 100-cavity detection device, 200-structure to be detected, 1-ultrasonic probe, 2-paint bottle, 3-telescopic rod, 4-paint pipeline, 5-mileage wheel, 6-universal wheel structure, 7-coupling layer, 8-bracket, 9-cavity, 10-host computer, 11-robot, 12-storage and acquisition system, 13-concrete. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] The purpose of the present invention is to provide a cavity detection device and method to solve the problems existing in the above-mentioned prior art. By using an ultrasonic probe, the structure to be detected is fully detected and the cavity position is marked.

[0047] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] At present, there is no automatic detection system for large-diameter pipeline hollow defects on the market, and the on-site detection method still uses the traditional manual tapping method. There are many disadvantages in the manual tapping detection method. Since the hollow detection process mainly depends on the subjective judgment of the workers, the detection accuracy is low. At the same time, due to the height of the pipeline, it is difficult to transport workers to the top of the pipeline for detection, and the detection results of the traditional detection method are not comprehensive. In the process of manual tapping detection, some hollow defects are small in area and are easily missed, affecting the accuracy of the detection. Therefore, under the problem of being unable to accurately and automatically detect whether the pipeline and concrete are completely filled, it is necessary to develop an internal detection system that can automatically detect and record data in the pipeline to provide a guarantee for the judgment of the hollow part of the pipeline. The impact echo method acts on a single test surface, but when detecting the cavity in a large-diameter pipeline, due to the limitations of mechanical impact, multiple surface detections will cause stress waves to be superimposed, resulting in errors in the detection. Therefore, the impact echo method is not very suitable for multiple test surfaces or large-area detection surfaces. In the ultrasonic detection method, electromagnetic ultrasound and piezoelectric ultrasound are usually used for cavity detection. However, since it is a field operation, electromagnetic ultrasound is greatly interfered by external signals. Although the traditional single-probe piezoelectric ultrasonic detection is not subject to external interference, it is not strictly combined in some places when working on the curved surface, resulting in inaccurate detection. The infrared thermal imaging method requires more preparation work, and the steel pipe area is large, which is not suitable for large-scale operations. And the method requires the structure to be detected to be exposed to the external environment, which is greatly affected by the environment. All of the above methods can only be applied to small-area detection of a single test surface. The impact echo method and the electromagnetic ultrasonic detection method have high requirements for the on-site environment, and there should be no noise on the site. The piezoelectric ultrasonic detection method probe is not very ideal for the detection effect on the curved surface. Therefore, the present invention proposes a cavity detection device that fully fits the curvature of the steel pipe. By setting a spherical flexible water-sealed coupling probe, the sensitivity of the probe detection and the stability of the coupling environment are guaranteed. That is, it solves the disadvantage of only being able to detect on a single test surface, and can accurately fit the surface of the steel pipe for real-time detection. At the same time, there is no need to consider the mutual influence between ultrasonic signals. A cavity alarm system is also set up. By setting appropriate thresholds in the system to issue real-time alarms, the purpose of real-time detection of pipeline cavity conditions and real-time recording is achieved.

[0049] Example 1

[0050] like Figures 1 to 12As shown, this embodiment provides a cavity detection device 100, including: a bracket 8 and a detection structure, a coupling structure and a marking structure arranged on the bracket 8, the detection structure is a capsule array ultrasonic detection structure, the capsule array ultrasonic detection structure includes a plurality of ultrasonic probes 1 arranged in sequence, preferably three ultrasonic probes 1, the ultrasonic probe 1 is used to detect whether there is 9, and can detect the surface and internal cavity 9, the coupling structure is used to transport a coupling medium to the ultrasonic probe 1 to form a coupling layer 7 between the ultrasonic probe 1 and the structure to be detected 200 (i.e., an extra-large diameter pipeline), so as to achieve the fitting of the ultrasonic probe 1 and the structure to be detected 200, and when the presence of the cavity 9 is detected, the marking structure is used to mark the position of the cavity 9.

[0051] Since the acoustic impedance of ultrasonic signals in concrete and air is different, the acoustic impedance in air is much greater than that in concrete. When it is detected that the gap between the pipeline and the mountain is not filled with concrete 13 and there is air, a more obvious ultrasonic echo signal can be detected. This embodiment uses a capsule array ultrasonic detection structure for cavity detection, and transmits a coupling medium to the ultrasonic probe 1 through a coupling structure, so that the ultrasonic probe 1 is fully coupled with the structure to be detected 200, ensuring the sensitivity of the ultrasonic probe 1 detection and the stability of the coupling environment, and using a marking structure to mark the cavity position, solving the complex cavity detection problem in ultra-large diameter pipelines.

[0052] In this embodiment, the ultrasonic probe 1 is preferably an ultrasonic flexible water-sealed coupling probe, preferably a pocket wheel probe produced by Shantou Ultrasonic Electronics Co., Ltd., with an outer diameter of 15 mm and made of PZT piezoelectric material, a chip diameter of 10 mm, and a central resonant frequency of 5 MHz. The ultrasonic probe 1 transmits and receives ultrasonic waves to the inner wall of the pipe it passes through, and transmits them to the computer software for real-time observation, and then judges whether there are gaps in the concrete 13 based on the changes in the ultrasonic echo. The external shape of the ultrasonic probe 1 is similar to a wheel, and the arc surface of the ultrasonic probe 1 is used to contact the surface of the structure 200 to be detected. Several ultrasonic probes 1 are located in the same plane, and the distance between adjacent ultrasonic probes 1 is the same, and the distance between adjacent ultrasonic probes 1 is determined according to the size of the cavity where there is a hidden danger. For example, the area of ​​the cavity is 0.5m 2 There are hidden dangers when the ultrasonic probes 1 are adjacent to each other. The distance between adjacent ultrasonic probes 1 is set to less than 0.5m, which can improve the detection accuracy. The cavity detection device 100 of this embodiment is used to be set on the robot 11. As the robot moves, the ultrasonic probes 1 rotate, and each ultrasonic probe 1 always moves in a single direction along the structure to be detected 200, that is, it detects along the circumference of the pipeline. Figure 7 As shown, the cavity detection is performed on the area corresponding to the 120° central angle, such as Fig. 9As shown, the detection area is expanded, wherein the horizontal arrow is the moving route of the cavity detection device 100, and the inclined arrow is the retreat route of the cavity detection device 100. Through multiple movements, step by step, it is ensured that the concrete filling situation can be detected at all angles, and the detection of the entire area also saves time and cost.

[0053] In this embodiment, each ultrasonic probe 1 corresponds to a universal wheel structure 6, each universal wheel structure 6 includes two universal wheels, the universal wheel structure 6 is located behind the ultrasonic probe 1, and the universal wheel structure 6 is used to contact the surface of the structure to be detected 200 (that is, the inner surface of the extra-large diameter pipe). The universal wheel structure 6 ensures that the cavity detection device 100 detects along a straight line during the walking process.

[0054] In this embodiment, the coupling structure includes a storage structure and a plurality of coupling medium pipelines. The storage structure is used to hold the coupling medium. The coupling medium is preferably water. The coupling medium pipeline corresponds to the ultrasonic probe 1 one by one. One end of the coupling medium pipeline is connected to the storage structure, and the other end of the coupling medium pipeline corresponds to the position of the ultrasonic probe 1. A water pump and a valve are arranged on the coupling medium pipeline. During detection, the water pump and the valve are turned on, and the coupling medium in the storage structure is transported to the surface of the ultrasonic probe 1 through the coupling medium pipeline by the water pump, so that the ultrasonic probe 1 and the structure to be detected 200 are fully coupled. The flow rate of the water can be controlled as needed, and the adjustable flow range of the water flow rate is 0-500ml / min. This embodiment ensures that the ultrasonic probe 1 and the structure to be detected 200 are always in a fully water-coupled state during detection through the coupling structure, thereby ensuring the accuracy of detection.

[0055] In this embodiment, the marking structure includes a plurality of paint spray bottles 2, and the paint spray bottles 2 correspond to the ultrasonic probe 1 one by one. The nozzle of the paint spray bottle 2 is connected to one end of the paint spray pipe 4, and the other end of the paint spray pipe 4 corresponds to the position of the ultrasonic probe 1. The paint spray bottle 2 presses the nozzle through the telescopic rod 3 to spray paint, and the marking paint in the paint spray bottle 2 passes through the nozzle and the paint spray pipe 4 and is sprayed on the cavity position of the structure to be tested. When the ultrasonic probe 1 detects the cavity, the telescopic rod 3 extends and presses the nozzle of the paint spray bottle 2, so that the marking paint in the paint spray bottle 2 is sprayed to the position of the cavity. The marking structure also includes a relay and an alarm signal output circuit. As an electrical control device, the relay causes the telescopic rod of the spray gun to undergo a predetermined telescopic change in the electrical output circuit when it detects that the change of the ultrasonic echo signal exceeds the specified threshold range requirement. The two cooperate with each other to achieve defect marking. Fig.12Alarm signal output circuit: used for alarm signal output, controlling the back-end relay switch, and detecting paint marks in problem areas. The QS3VH861 thermal switch with 10-bit pass-through pin output is a high-bandwidth bus switch with very low on-resistance, and the propagation delay through the switch is less than 250ps. The QS3VH861 has near-zero propagation delay, high off impedance, and overvoltage tolerance, making it ideal for high-performance communication applications. The operating temperature range of the QS3VH861 is -40°C to +85°C. The tag structure transfers the data to the data acquisition storage system for data processing and storage, and displays the detection results through the host computer 10.

[0056] The present embodiment also includes a mileage wheel 5, which records the kilometers traveled by the detection structure by rolling circles. There will be numerical records when moving forward or backward, and the numerical records will be uploaded to the display interface of the host computer 10 in real time.

[0057] According to the actual pipeline conditions, this embodiment adopts the ultrasonic probe 1 to avoid the troubles caused by the limitations of the external environment of the pipeline. After the internal cleaning of the pipeline, the pipeline can be fully inspected in all directions and with high precision without damaging the pipeline.

[0058] This embodiment uses a capsule array ultrasonic detection structure to effectively identify the cavity conditions of large-diameter pipelines, and accurately records and determines the cavity locations by connecting to a computer system, thereby providing a complete technical solution for timely eliminating pipeline operation hazards and evaluating pipeline integrity.

[0059] During the detection process, each ultrasonic probe 1 works independently, and each coupling medium pipeline transports coupling medium to the detection area under the corresponding ultrasonic probe 1, ensuring that the ultrasonic probe 1 is fully coupled during the detection process. Through ultrasonic detection technology, the pulse echo method is used to perform all-round detection of the pipe wall. When encountering a cavity area during travel, the telescopic rod 3 in the marking structure extends and squeezes the paint can to form a mark, until after passing the cavity area, the telescopic rod 3 shrinks and the paint marking ends. The mileage wheel 5 always records the mileage and position of the detection path, and transmits it to the computer system together with the detection data and marks.

[0060] like Figure 5 and Fig.10As shown, a storage and acquisition system 12 is integrated in the detection structure; the storage and acquisition system is connected to the mileage wheel; the storage and acquisition system 12 is also connected to the host computer 10; the storage and acquisition system 12 is used to obtain the mileage wheel data; the mileage wheel data includes the cumulative forward rotation number and the cumulative reverse rotation number of the mileage wheel at any time; the storage and acquisition system 12 is also used to obtain multi-channel ultrasonic callback signals; the ultrasonic callback signal corresponds to the ultrasonic probe one by one; the ultrasonic callback signal is collected after the ultrasonic signal emitted by the corresponding ultrasonic probe is reflected by the pipe wall or the object behind the pipe wall cavity; the storage and acquisition system 12 is used to transmit the mileage wheel data and the ultrasonic callback signal to the host computer 10. Preferably, it also includes a power supply system node; the power supply system node is respectively connected to the ultrasonic probe, the paint spray bottle and the storage and acquisition system 12.

[0061] The principle of storage and acquisition system 12 is as follows Fig.11 The data acquisition and storage system consists of data transmission lines and data processing boards. The upper computer display system is implemented through computer software programming and communicates with the detection system through Ethernet to realize data visualization display.

[0062] The acquisition and storage system includes a small phased array module, a conventional thickness probe adapter board, a small computer, a thickness probe and Windows computer application software. The instrument end and the computer end are connected through a network cable for control and data communication. During the detection, the water pump controls the water spray flow rate to realize the probe detection water coupling environment, and the detection equipment moves along the inner wall of the pipeline. By comparing the intensity of the secondary echo signal, it can be determined whether there is a gap between the outer wall of the pipeline and the mountain. In addition, the system adopts the automatic search and tracking function of the thickness gate. The A and B gates track the primary and secondary bottom waves, which effectively improves the detection efficiency and measurement accuracy. Among them, the synchronization circuit ensures that all parts of the acquisition and storage system can work under the same time reference. The transmitting circuit provides an excitation signal for the ultrasonic probe, the receiving circuit receives the ultrasonic echo signal, and the corresponding echo signal processing circuit further processes the received echo signal, and then the processed signal is scanned and analyzed by the time base circuit. Finally, the final waveform is displayed on the display screen, thereby completing the waveform display work.

[0063] The acquisition and storage system has the following features: Display mode: A scan + B scan + C scan, real-time and automatic acquisition of detection images and thickness measurement data; Thickness measurement and imaging method: In the A scan image, the C gate covers the interface wave, the A gate covers the primary bottom wave of the outer wall of the pipe, and the B gate covers the secondary bottom wave of the outer wall of the pipe. The sound path of the B gate minus the sound path of the A gate can get the wall thickness. Different color values ​​are used for imaging according to the range of wall thickness values. 128 channels form 128 thickness lines, and all thickness lines are arranged together to form a thickness measurement C scan image; Process parameter saving and calling function: The adjusted process parameters can be saved for future calls; Data transfer and playback function: The saved detection records can be transferred to other computers through U disk, network, etc., and the detection records (including detection parameters and C scan image data, etc.) can be played back and analyzed; It has a thickness data search function. In the playback state, the thickness measurement data can be searched by adjusting the search lower limit and search upper limit, and then playback analysis can be performed; The equipment supports data transmission control capabilities of more than 50 meters; The minimum measurement accuracy can reach 0.1mm. The upper computer display system is realized through computer software programming, and communicates with the detection system via Ethernet to realize data visualization display.

[0064] In addition, the cavity detection device also includes a power supply system section, which is respectively connected to the ultrasonic probe, the paint spray bottle and the storage and acquisition system 12. The power supply system section includes a power supply and a voltage overload protection device.

[0065] The present invention is based on piezoelectric ultrasound for air gap detection, and combines advanced ultrasonic detection technology with an alarm spray control system to detect whether cement is fully filled at the construction site. During the detection process, ultrasonic echo comparison is used to determine whether there is a gap between the concrete 13 and the pipeline. Using self-programmed acquisition and processing software, data acquisition and processing software is developed, which has the functions of real-time processing of detection data and displaying the result graphs of ultrasonic A scan, B scan and C scan. An automatic alarm unit is set to realize instant alarm of defect detection data and real-time spray control, thereby achieving the purpose of real-time detection of pipeline cavities. The judgment process is as follows: the ultrasonic wave is emitted, and the energy of the second echo is used to determine whether there is a gap. The echo energy is large, that is, the peak value is very high, indicating that there is air between the concrete 13 and the pipeline. The ultrasonic wave cannot propagate in the air, so it is all reflected back at the bottom of the steel plate, so the energy is very high. If there is no cavity, that is, the steel plate and the concrete 13 are in close contact, part of the ultrasonic wave will pass through the steel plate into the concrete, resulting in less energy of the echo at the bottom of the steel plate, so the size of the echo energy is used to determine whether there is a gap.

[0066] Example 2

[0067] This embodiment discloses a cavity detection method, which is applied to the cavity detection device as described in Embodiment 1.

[0068] like Fig.13 , cavity detection methods, including:

[0069] Step 201: Acquire an ultrasonic callback signal corresponding to any ultrasonic probe at the current moment as a current ultrasonic callback signal.

[0070] Step 202: determine whether the current ultrasonic callback signal reaches a preset ultrasonic callback signal risk value, and obtain a determination result; if the determination result is yes, execute step 203; if the determination result is no, execute step 206.

[0071] Step 203: If the judgment result is yes, the odometer wheel data at the current moment is obtained; the odometer wheel data includes the accumulated forward rotation number and the accumulated reverse rotation number of the odometer wheel at any moment.

[0072] Step 204: According to the odometer data at the current moment, determine that the position of the cavity detection device at the current moment is the cavity position, and send the current moment and the cavity position to the storage and acquisition system.

[0073] Step 205: Generate a cavity alarm signal and a paint spraying signal, and send the paint spraying signal to the paint spraying bottle corresponding to the current ultrasonic callback signal.

[0074] Step 206: Update the current ultrasonic callback signal, and return to step 202 until all ultrasonic callback signals corresponding to the ultrasonic probes at the current moment are traversed. Step 206 is executed after step 205 or when the judgment result is no.

[0075] Step 207: Update the current time and return to step 201.

[0076] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A cavity detection device, characterized in that: include: A detection structure, a coupling structure and a marking structure, wherein the detection structure is a capsule array ultrasonic detection structure, and the capsule array ultrasonic detection structure includes a plurality of ultrasonic probes arranged in sequence, wherein the ultrasonic probe is used to detect whether there is a cavity, and the coupling structure is used to transport a coupling medium to the ultrasonic probe so that the ultrasonic probe and the structure to be detected fit together. When the presence of a cavity is detected, the marking structure is used to mark the position of the cavity.

2. The cavity detection device according to claim 1, characterized in that: The plurality of ultrasound probes are located in the same plane, and the distances between adjacent ultrasound probes are the same.

3. The cavity detection device according to claim 2, characterized in that: The distance between adjacent ultrasonic probes is less than 0.5 m.

4. The cavity detection device according to claim 1, characterized in that: The coupling structure includes a storage structure and a plurality of coupling medium pipelines. The storage structure is used to hold the coupling medium. The coupling medium pipelines correspond to the ultrasonic probes one by one. One end of the coupling medium pipeline is connected to the storage structure, and the other end of the coupling medium pipeline corresponds to the position of the ultrasonic probe. A water pump and a valve are provided on the coupling medium pipeline.

5. The cavity detection device according to claim 1, characterized in that: The marking structure includes a plurality of paint spray bottles, which correspond to the ultrasonic probes one by one. The spray nozzle of the paint spray bottle is connected to one end of a paint spray pipeline, and the other end of the paint spray pipeline corresponds to the position of the ultrasonic probe. The paint spray bottle sprays paint by pressing a spray head through a telescopic rod. The marking paint in the paint spray bottle passes through the spray head and the paint spray pipeline and is sprayed on the cavity position of the structure to be measured.

6. The cavity detection device according to claim 5, characterized in that: It also includes a mileage wheel, which is used to record the detection mileage of the ultrasonic probe.

7. The cavity detection device according to claim 1, characterized in that: Each of the ultrasonic probes corresponds to a universal wheel structure, and the universal wheel structure is used to contact the surface of the structure to be detected.

8. The cavity detection device according to claim 6, characterized in that: A storage and acquisition system is integrated in the detection structure; The storage and acquisition system is connected to the mileage wheel; the storage and acquisition system is also connected to the host computer; The storage and acquisition system is used to obtain odometer wheel data; the odometer wheel data includes the cumulative number of positive rotations and the cumulative number of reverse rotations of the odometer wheel at any time; The storage and acquisition system is also used to obtain multi-channel ultrasonic callback signals; the ultrasonic callback signals correspond to the ultrasonic probes one by one; the ultrasonic callback signals are collected after the ultrasonic signals emitted by the corresponding ultrasonic probes are reflected by the pipe wall or the object behind the pipe wall cavity; The storage and acquisition system is used to transmit the mileage wheel data and the ultrasonic callback signal to the host computer.

9. The cavity detection device according to claim 8, characterized in that: It also includes the power supply system section; The power supply system node is respectively connected to the ultrasonic probe, the paint spray bottle and the storage and acquisition system.

10. A cavity detection method, characterized in that: The cavity detection method is applied to the cavity detection device according to any one of claims 1 to 9, and the cavity detection method comprises: Obtaining an ultrasonic callback signal corresponding to any ultrasonic probe at the current moment as a current ultrasonic callback signal; Determine whether the current ultrasonic callback signal reaches a preset ultrasonic callback signal risk value, and obtain a determination result; If the judgment result is yes, the odometer wheel data at the current moment is obtained; the odometer wheel data includes the cumulative number of positive rotations and the cumulative number of reverse rotations of the odometer wheel at any moment; According to the odometer data at the current moment, determine that the position of the cavity detection device at the current moment is the cavity position, and send the current moment and the cavity position to the storage and acquisition system; Generate a cavity alarm signal and a paint spraying signal, and send the paint spraying signal to the paint spraying bottle corresponding to the current ultrasonic callback signal; Update the current ultrasonic callback signal, and return to step "determine whether the current ultrasonic callback signal reaches the preset ultrasonic callback signal risk value, and obtain the judgment result" until the ultrasonic callback signals corresponding to all ultrasonic probes at the current moment are traversed; Update the current time, and return to step "obtaining the ultrasonic callback signal corresponding to any ultrasonic probe at the current time as the current ultrasonic callback signal".

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