A method, system and apparatus for can top defect detection

Abstract

The application discloses a kind of tank top defect detection system, method and equipment.The method includes: tank top is divided into at least one detection area, at least one excitation sensor band and at least one receiving sensor band are arranged in detection area;Excitation signal instrument generates and outputs corresponding first electric signal according to detection instruction signal sent by host computer;Excitation sensor band receives the first electric signal and converts first electric signal into acoustic signal and propagates on tank top;Receiving sensor band collects acoustic signal of tank top, and converts the acoustic signal collected into second electric signal;Signal collection instrument collects second electric signal according to the receiving instruction signal of host computer and transmits to host computer, and tank top defect analysis is carried out in host computer to realize the detection of tank top defect.The tank top defect detection method of the application simplifies the arrangement process of sensor band, and simultaneously, operation is simple and convenient, and tank top detection cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and in particular to a method, system and equipment for detecting defects on the top of a tank. Background Technology

[0002] Energy is a crucial pillar of modern economic development and a vital strategic resource for national economic growth. Data from the National Energy Statistics Bureau in 2021 shows that my country's average daily crude oil production in 2021 was 546,500 tons, a 2.5% increase compared to the average daily production in 2020. Meanwhile, despite rising international crude oil prices, from $55 per barrel in January 2021 to $85 per barrel in December 2021, my country's crude oil imports remained at an average of 42.464 million tons per month, totaling 509.57 million tons. To mitigate the risks associated with my country's high dependence on imported crude oil, while simultaneously meeting domestic oil demand and ensuring national energy security, the country is gradually improving its oil reserve system. Storage tanks have become a critical and fundamental piece of equipment for ensuring the reserves of my country's oil and gas resources and chemical materials, used to collect and store oil and guarantee the stability of subsequent oil supply and transportation. Most of my country's oil reserve bases (warehouses) have a single tank capacity of 10 × 10⁴ m³. 3 External floating roof tanks, with the largest floating roof tank reaching 20×10⁴ m. 3 Common domed oil tanks have a volume starting from 100m³. 3 1000m 3 up to 50000m 3 100000m 3 Not equal.

[0003] Due to the large size of storage tanks, maintenance costs are high. Generally, conventional non-destructive testing (NDT) methods for large storage tanks require descaling and rust removal operations under shutdown conditions, sometimes even necessitating opening the tank for inspection. These methods require shutdown, have long inspection cycles, high costs, and are labor-intensive. Furthermore, the structural characteristics of the tank top make construction difficult, and the placement of sensors on the tank top is significantly limited, making conventional NDT impossible. These issues necessitate a large-area defect detection system suitable for monitoring the structural health of oil storage tank tops, one that can reduce inspection cycles and costs, and allows for easy sensor placement.

[0004] Existing instruments for detecting corrosion defects in storage tanks mainly include the Floormap series robots using magnetic flux leakage detection technology, the DISP acoustic emission testing system based on acoustic emission technology, the Scorpion DCP detection system developed based on ultrasonic detection technology, and the DEMA series robots that rely on mechanical devices to climb tank walls for ultrasonic thickness measurement. The Floormap series robots utilize electromagnetic detection technology to detect defects with corrosion amounts up to 20% of the tank bottom plate thickness, achieving precise location and quantitative assessment of corrosion defects. The generated inspection report displays the overall defect distribution of the tank bottom plate and distinguishes whether corrosion defects are located near the surface or on the lower surface. Both the Scorpion DCP detection system and the DEMA series robots use magnetic mechanical chains to move freely on the test piece and transmit signals over long distances. Combined with ultrasonic thickness measurement technology, they achieve defect scanning within a certain range. The inspection process does not require grinding of the anti-corrosion layer or coupling agent; adjusting the inspection step size yields results with varying accuracy. Summary of the Invention

[0005] The inventors have discovered that, due to the unique nature of tank top inspection, existing inspection methods are complex to operate and costly.

[0006] In view of the above problems, the present invention is proposed to provide a method, system and device for detecting defects on the top of a tank to overcome or at least partially solve the above problems.

[0007] In a first aspect, embodiments of the present invention provide a tank top defect detection system, characterized in that it includes: a host computer, a signal exciter, at least one excitation sensor band, at least one receiving sensor band, and a signal acquisition instrument;

[0008] The host computer is used to send and receive detection command signals, and to receive the second electrical signal sent by the signal acquisition instrument, and to perform tank top defect analysis based on the second electrical signal;

[0009] The signal exciter is connected to the host computer and is used to generate and output a corresponding first electrical signal according to the detection command signal sent by the host computer.

[0010] The excitation sensor is connected to the signal exciter and is mounted on the top of the tank to receive the first electrical signal and convert the first electrical signal into an acoustic signal that propagates on the top of the tank.

[0011] The receiving sensor strip is used to be installed on the top of the tank to collect the sound signal from the top of the tank and convert the collected sound signal into a second electrical signal.

[0012] The signal acquisition device is connected to the receiving sensor strip and the host computer, and is used to transmit the second electrical signal of the receiving sensor strip to the host computer according to the receiving instruction signal sent by the host computer.

[0013] In some optional embodiments, the tank top defect detection system further includes: a communication repeater;

[0014] The communication repeater is connected to the host computer, the signal exciter, and the signal acquisition device to perform signal transmission between the host computer and the signal exciter, and between the signal acquisition device and the host computer.

[0015] In some optional embodiments, the communication repeater is connected to the host computer via a wired network, and the communication repeater is connected to the signal exciter and signal acquisition device via a wireless network.

[0016] In some optional embodiments, the excitation sensor strip includes: an excitation substrate strip and at least one excitation sensor group;

[0017] The excitation substrate is a strip structure, and the excitation substrate has at least one hollow structure to place the excitation sensor group.

[0018] In some optional embodiments, the receiving sensor band includes: a receiving baseband and at least one receiving sensor group;

[0019] The receiving base strip is a strip structure, and the receiving base strip has at least one hollow structure to place the receiving sensor group.

[0020] In some optional embodiments, the bottom of the excitation sensor group is horizontally parallel to the bottom of the excitation substrate; the bottom of the receiving sensor group is horizontally parallel to the bottom of the receiving substrate.

[0021] In some alternative embodiments, the receiving sensor group is a single dual-element sensor, which is a sensor comprising two piezoelectric ceramic plates and a control switch.

[0022] In some alternative embodiments, the excitation substrate of the excitation sensor strip and the receiving substrate of the receiving sensor strip are made of flexible materials.

[0023] Secondly, embodiments of the present invention provide a method for detecting tank top defects using the aforementioned tank top defect detection system, the steps of which are as follows:

[0024] The top of the tank is divided into at least one detection area, and at least one excitation sensor strip and at least one receiving sensor strip are arranged in the detection area.

[0025] The excitation signal device generates and outputs a corresponding first electrical signal based on the detection command signal sent by the host computer;

[0026] The excitation sensor receives the first electrical signal and converts it into an acoustic signal that propagates on the top of the tank.

[0027] The sensor receives the acoustic signal from the top of the tank and converts the collected acoustic signal into a second electrical signal.

[0028] The signal acquisition instrument collects the second electrical signal according to the receive command signal sent by the host computer and transmits it to the host computer, where the host computer performs tank top defect analysis.

[0029] In some optional embodiments, arranging at least one excitation sensor strip and at least one receiving sensor strip within the detection area on the tank top includes:

[0030] At least one excitation sensor strip and at least one receiving sensor strip are laid radially from the edge of the tank top towards the center of the tank top.

[0031] The excitation sensor strip and the receiving sensor strip are arranged at intervals within the same detection area, and are parallel to each other or at a preset angle.

[0032] Thirdly, embodiments of the present invention also provide an integrated guided wave excitation and acquisition device, which is used to connect to the host computer, the excitation sensor strip, and the receiving sensor strip respectively;

[0033] The integrated guided wave excitation acquisition device is used to receive the detection command signal from the host computer, generate and output a corresponding first electrical signal, transmit the first signal to the excitation sensor strip, receive the second electrical signal output by the receiving sensor strip, and finally transmit the second electrical signal to the host computer.

[0034] The beneficial effects of the above-described technical solutions provided in the embodiments of the present invention include at least the following:

[0035] In the tank top defect detection method and system provided in this invention, the signal exciter outputs a corresponding first electrical signal according to the detection command signal sent by the host computer. The first electrical signal is transmitted to the excitation sensor strip through a connecting wire. The excitation sensor strip converts the first electrical signal into an acoustic signal and propagates it on the tank top. This acoustic signal is received by the receiving sensor strip and converted into a second electrical signal. The signal acquisition device collects the second electrical signal according to the receiving command signal from the host computer and transmits it to the host computer for tank top defect analysis. The defect detection method of this invention is simple to operate, requiring only the placement of the excitation sensor strip and the receiving sensor strip on the tank top, eliminating the need to place multiple sensors multiple times, thereby shortening the tank top defect detection time and saving detection costs.

[0036] Compared with traditional tank top detection methods, the excitation sensor strip and receiving sensor strip in this embodiment are flexible structures. During the arrangement of the excitation sensor strip and receiving sensor strip, they have a strong ability to fit the uneven surface structure of the tank top, so that the acoustic signal converted by the excitation sensor strip can be better propagated on the tank top. At the same time, each sensor group is directly fixedly connected to its base strip, ensuring the relative position between the sensor groups and ensuring accurate transmission and collection of the tank top signal, thus increasing the accuracy of tank top defect analysis.

[0037] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0038] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0039] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0040] Figure 1 This is a schematic diagram of the tank top defect detection system in an embodiment of the present invention;

[0041] Figure 2 This is a physical diagram of the tank top defect detection system in an embodiment of the present invention;

[0042] Figure 3 This is a schematic diagram of the sensor strip arrangement structure in an embodiment of the present invention;

[0043] Figure 4 This is a schematic diagram of the signal acquisition device receiving signals in an embodiment of the present invention;

[0044] Figure 5 This is a flowchart of the tank top defect detection method in an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the sensor belt arrangement on the top of the irrigation canal in an embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram of the integrated guided wave excitation acquisition device in an embodiment of the present invention. Detailed Implementation

[0047] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0048] Due to the load-bearing limitations on the top of the storage tank, inspectors often cannot move freely in the top area. During the inspection of the tank top, the placement of sensors is quite difficult. To address the problem that the arched structure of the tank top makes it difficult to fit the sensors and the placement of the sensors is difficult, the inventors have provided a method, system, and equipment for detecting defects on the tank top.

[0049] This invention provides a tank top defect detection system, such as... Figure 1 As shown, it includes: a host computer 1, a signal exciter 2, at least one excitation sensor band 3, at least one receiving sensor band 4, and a signal acquisition device 5;

[0050] The host computer 1 is used to send detection command signals and receive command signals, and to receive the second electrical signal sent by the signal acquisition instrument 5, and to perform tank top defect analysis based on the second electrical signal;

[0051] The signal exciter 2 is connected to the host computer 1 and is used to generate and output a corresponding first electrical signal according to the detection command signal sent by the host computer;

[0052] The excitation sensor 3 is connected to the signal exciter 2 and is used to be installed on the top of the tank to receive the first electrical signal and convert the first electrical signal into an acoustic signal and propagate it on the top of the tank.

[0053] The receiving sensor band 4 is used to be installed on the top of the tank to collect the sound signal from the top of the tank and convert the collected sound signal into a second electrical signal;

[0054] The signal acquisition device 5 is connected to the receiving sensor band 4 and the host computer 1, and is used to transmit the second electrical signal of the receiving sensor band 4 to the host computer 1 according to the receiving instruction signal sent by the host computer 1.

[0055] Optionally, the tank top defect detection system also includes: a communication repeater, based on... Figure 2 A physical image of the tank top defect detection system shows that:

[0056] The communication repeater is connected to the host computer, signal exciter, and signal acquisition device to enable signal transmission between the host computer and the signal exciter, and between the signal acquisition device and the host computer. The communication repeater and the host computer are connected via a wired network; optionally, signal transmission between the host computer and the communication repeater is achieved via fiber optic cable and an RS-485 communication module.

[0057] The communication repeater is connected to the signal exciter and signal acquisition device via a wireless network; optionally, the communication repeater can transmit data to the signal exciter and signal acquisition device via wireless local area network technology, such as Zigbee technology or WiFi wireless communication.

[0058] The signal exciter and the excitation sensor strip, and the signal acquisition device and the receiving sensor strip are connected via a wired network, that is, connected by connecting wires.

[0059] The excitation sensor strip of this embodiment includes: an excitation substrate strip and at least one excitation sensor group; the excitation substrate strip is a strip structure of flexible material, and the excitation substrate strip has at least one hollow structure for placing the excitation sensor group, wherein one hollow structure corresponds to one excitation sensor group, such as... Figure 3 As shown, the excitation sensor group is connected by an island bridge design. The bottom horizontal position of the excitation sensor group is parallel to the bottom of the excitation base strip, so that the excitation sensor group can directly contact and couple with the tank top structure after the excitation base strip is laid on the tank top.

[0060] Optionally, in practical applications, the excitation sensor group and the excitation substrate can be integrally encapsulated with silicone potting compound. This ensures reinforcement of the equipment without increasing the hardness of the excitation sensor strip, enhancing its safety and reliability. It also provides a degree of sealing, waterproofing, and insulation, preventing water from entering the excitation and receiving sensor groups and causing leakage in the event of water accumulation on the tank top. Each excitation sensor group is connected to the signal exciter via connecting wires. During connection, the connecting wires can be divided into two groups and secured from both sides of the silicone tape using a wire-gathering device. Simultaneously, the connecting wires are encapsulated together with the excitation sensor group and the excitation substrate during potting.

[0061] In one embodiment, the receiving sensor band includes: a receiving base band and at least one receiving sensor group;

[0062] The receiving substrate is a strip structure made of flexible material, and there is at least one hollow structure on the receiving substrate to place the receiving sensor group. When placed, the bottom of the receiving sensor group is horizontally parallel to the bottom of the receiving substrate.

[0063] It should be noted that the specific settings between the receiving sensor group and the receiving sensor strip are the same as or similar to the settings between the excitation sensor group and the excitation sensor strip described above. They can be used as a reference for setting, and will not be repeated here.

[0064] In this embodiment of the invention, each sensor group in the excitation sensor strip and the receiving sensor strip is a rigid structure, while the encapsulated excitation sensor strip and the receiving sensor strip are integrally bendable. This allows the sensor strips to actively conform to the uneven surface of the tank top during the arrangement of the excitation sensor strip and the receiving sensor strip. This enables the acoustic signal converted by the excitation sensor strip to propagate better on the tank top, be received by the receiving sensor strip, and converted into a second electrical signal, which is then transmitted to the host computer via a signal acquisition device. This ensures accurate transmission and collection of the tank top signal, increasing the accuracy of tank top defect analysis. Furthermore, the integral encapsulation of the sensor group and the base strip allows for the simultaneous arrangement of the excitation sensor group and the receiving sensor group, compared to arranging multiple sensor groups separately. This saves arrangement time, simplifies the arrangement process, and ensures the spacing and relative position between each sensor group.

[0065] Optionally, the receiving sensor group in this embodiment of the invention is a single-group dual-element sensor. The single-group dual-element sensor contains two piezoelectric ceramic sheets and a control switch. Compared to a conventional sensor group, the receiving sensor group can have two piezoelectric ceramic sheets of the same specification and a single-pole double-throw control switch. The two piezoelectric ceramic sheets are respectively connected to the control switch. The switch can be used to select the piezoelectric ceramic sheet for information transmission via a time interval. When one piezoelectric ceramic sheet is working, the other is inactive. The two piezoelectric ceramic sheets in this receiving sensor group share a single transmission outlet and are connected to a signal acquisition device via a connecting wire for signal transmission. The signal acquisition device uses a single acquisition path to achieve single-channel time-division multiplexing sampling of the two piezoelectric ceramic sheets. A schematic diagram of the waveform signal acquired by the signal receiver is shown below. Figure 4 As shown.

[0066] Based on the same inventive concept, embodiments of the present invention also provide a method for detecting defects on the tank top using the aforementioned defect detection system, the steps of which are as follows: Figure 5 As shown:

[0067] Step S101: Divide the top of the tank into at least one detection area, and arrange at least one excitation sensor strip and at least one receiving sensor strip in the detection area;

[0068] Step S102: The excitation signal instrument generates and outputs the corresponding first electrical signal according to the detection command signal sent by the host computer;

[0069] Step S103: The excitation sensor receives the first electrical signal and converts it into an acoustic signal that propagates on the top of the tank;

[0070] Step S104: Receive the acoustic signal from the top of the collection tank via the sensor belt, and convert the collected acoustic signal into a second electrical signal;

[0071] Step S105: The signal acquisition instrument collects the second electrical signal according to the receiving instruction signal sent by the host computer and transmits it to the host computer, where the tank top defect analysis is performed.

[0072] In step S101, the step of arranging at least one excitation sensor strip and at least one receiving sensor strip in the detection area on the top of the tank can be implemented in the following way:

[0073] At least one excitation sensor strip and at least one receiving sensor strip are laid from the edge of the tank top towards the center. The excitation sensor strip and the receiving sensor strip are arranged at intervals within the same detection area, and are parallel to each other or at a predetermined angle. Optionally, the excitation sensor strip and the receiving sensor strip can be arranged at an acute angle, an obtuse angle, or parallel to each other, as long as the final detection area covers the entire tank top. The specific arrangement is not limited in this invention. Preferably, for an arched tank top structure, the excitation sensor strip and the receiving sensor strip can be set perpendicularly at a 90-degree angle to facilitate the detection of the tank top and the collection of data. When excitation sensor strips and receiving sensor strips are arranged in multiple detection areas, in this embodiment of the invention, when performing defect detection on the tank top, excitation sensor strips and receiving sensor strips can be arranged simultaneously in each of the divided detection areas, or excitation sensor strips and receiving sensor strips can be arranged in another detection area after one detection area is completed. Therefore, defect detection of the entire tank top can be completed with only one excitation sensor strip and one receiving sensor, which can save detection costs.

[0074] When conducting defect inspection on the top of a tank, the top of the tank to be inspected can be divided into multiple inspection areas for inspection, depending on the needs. Taking the top of the storage tank to be inspected as divided into 4 inspection areas and performing defect inspection on one of the inspection areas as an example, the following explanation is provided:

[0075] When arranging the detection device, the excitation sensor strip and the receiving sensor strip are arranged first, starting from the edge of the tank top and moving towards the center. Figure 6 As shown, the angle between the excitation sensor strip and the receiving sensor strip is 90 degrees. Since the signal exciter and signal acquisition device need to be connected to the excitation sensor strip and the receiving sensor strip through wires, the signal exciter and signal acquisition device are generally placed on the edge of the top of the tank being tested. Optionally, they can be placed at the connection between the outer perimeter of the tank top plate and the stairs. The host computer is set in a control room far away from the tank area, while the communication repeater, as a signal transmission device, is set in a safe area with stable ground. Optionally, the communication distance between the host computer and the communication repeater should be kept within 1000m, and the distance between the communication repeater and the signal exciter and signal acquisition device should be controlled within 50m.

[0076] During tank inspection, inspectors control a communication repeater via a host computer in the control room. This repeater uses Zigbee or WiFi technology to send detection and reception command signals to the signal exciter and signal acquisition unit. Upon receiving the detection command signal, the signal exciter begins operation, selecting a specific channel switch to activate based on the signal's content, outputting the corresponding first electrical signal, while the remaining switches remain inactive. Simultaneously, the excitation sensor group of the corresponding channel converts the first electrical signal into an acoustic signal. This acoustic signal generates guided waves in the structural plate, propagating forward through the detection area on the tank top. The waves are then received by the sensor group within the receiving sensor group, converting the electrical signal into a second acoustic signal. Upon receiving the reception command signal, the receiver begins operation, simultaneously activating multiple channels to receive the second electrical signal and transmitting it to the host computer. After completing the inspection of each designated detection area on the tank top, the host computer uses a dual-element, reference-free corrosion defect localization imaging method to process and analyze all the detection data, ultimately obtaining the corrosion defect imaging results for the tank top plate. The entire system's wireless communication module enables signal and data transmission between the host computer and the excitation system, meeting the explosion-proof requirements of the testing site while featuring long-distance transmission and low-power communication. Specific implementation methods for the dual-element, reference-free corrosion defect localization imaging method can be found in existing technologies and will not be elaborated upon here.

[0077] Optionally, before arranging the excitation sensor strips and receiving sensors, a layout diagram should be drafted. During arrangement, the sensors should be placed as far away as possible from structurally complex areas such as welded joints and supports on the inspected part, and the inspected area should cover the entire tank top area after arrangement. The number of excitation and receiving sensor strips can be selected based on the size and structure of the tank top plate. The number of sensor groups included in each excitation and receiving sensor strip can also be selected, ensuring that the spacing between each sensor group is no greater than 2m. Preferably, each sensor group is arranged at equal intervals on the relevant sensor strips to facilitate subsequent imaging. Recommendations for sensor strips and the number of sensor groups per strip for several common tank top plate diameters are shown in Table 1 below.

[0078] Table 1 Recommended Sensor Band Length for Domed Tanks

[0079] Tank top plate diameter (m) Number of sensors Number of sensors per strip 6 4 3 20 6 10 40 8 20 60 10 30 80 12 40

[0080] The lengths of the excitation and receiving sensor strips can be set according to the diameter of the top plate of the tank being inspected. This ensures that when the excitation and receiving sensor strips are in contact with the tank top, their detection areas completely cover the area to be detected on the tank top, preventing data loss due to incomplete coverage. Preferably, the length of the sensor strip is equal to the radius of the tank top plate.

[0081] The defect detection method and system of this invention have the advantages of high detection accuracy and simple arrangement because the excitation sensor strip and the receiving sensor strip are flexible structures, and the excitation sensor group and the receiving sensor group are respectively encapsulated in the excitation substrate strip and the receiving substrate strip. Compared with the traditional sensor group arrangement, the relative positions of each sensor group are relatively fixed.

[0082] On the other hand, embodiments of the present invention also provide an integrated guided wave excitation and acquisition device, which is used to connect to a host computer, an excitation sensor strip, and a receiving sensor strip respectively;

[0083] The guided wave excitation acquisition integrated device is used to receive the detection command signal from the host computer, generate and output the corresponding first electrical signal, transmit the first signal to the excitation sensor belt, receive the second electrical signal output by the receiving sensor belt, and transmit the second electrical signal to the host computer.

[0084] like Figure 7 As shown in the example, this integrated guided wave excitation and acquisition device can integrate an intrinsically safe guided wave collector and an explosion-proof guided wave exciter, wherein:

[0085] The explosion-proof guided wave exciter includes: a high-capacity battery, a WiFi communication interface, a microprocessor, an arbitrary waveform DDS (Direct Digital Synthesizer), a power amplifier, and a multiplexer. It receives detection command signals from a PC, generates and outputs a corresponding first electrical signal, and transmits this first signal to the excitation sensor. The high-capacity battery provides power to the WiFi communication interface, microprocessor, arbitrary waveform DDS, power amplifier, and multiplexer.

[0086] The intrinsically safe guided wave acquisition unit includes: an intrinsically safe power supply, a WiFi communication interface, and an 8-channel AD acquisition and conditioning circuit, used to receive the second electrical signal output by the receiving sensor and transmit the second electrical signal to the host computer. The intrinsically safe power supply provides power to the WiFi communication interface and the 8-channel AD acquisition and conditioning circuit.

[0087] When the guided wave excitation and acquisition integrated device is working, the detection command signal and the receiving command signal sent from the PC are transmitted to the communication repeater via wired fiber optic communication. The communication repeater then transmits the signal wirelessly via WiFi to the explosion-proof guided wave exciter and the intrinsically safe guided wave collector. After processing by the guided wave excitation and acquisition integrated device, the detection command signal generates a first electrical signal, which is transmitted to the excitation sensor strip. The excitation sensor strip converts the first electrical signal into an acoustic signal, which is then received by the receiving sensor strip and converted into a second electrical signal. The second electrical signal is received by the guided wave excitation and acquisition integrated device and transmitted wirelessly via WiFi to the communication repeater. The communication repeater then retransmits the signal to the PC via wired fiber optic communication for data analysis.

[0088] It should be noted that the integrated guided wave excitation and acquisition device of the present invention is not limited to the specific structure in the embodiments. Any device that can generate and transmit signals according to the detection command signals output by the host computer and can realize the signal acquisition function according to the corresponding receiving command signals can be used.

[0089] Regarding the device in the above embodiments, the specific manner in which the operation is performed has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0090] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0091] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A tank top defect detection system, characterized in that, include: Host computer, signal exciter, at least one excitation sensor strip, at least one receiving sensor strip, and signal acquisition device; The host computer is used to send and receive detection command signals, and to receive the second electrical signal sent by the signal acquisition instrument, and to perform tank top defect analysis based on the second electrical signal; The signal exciter is connected to the host computer and is used to generate and output a corresponding first electrical signal according to the detection command signal sent by the host computer. The excitation sensor is connected to the signal exciter and is mounted on the top of the tank to receive the first electrical signal and convert the first electrical signal into an acoustic signal that propagates on the top of the tank. The receiving sensor strip is used to be installed on the top of the tank to collect the sound signal from the top of the tank and convert the collected sound signal into a second electrical signal. The signal acquisition device is connected to the receiving sensor strip and the host computer, and is used to transmit the second electrical signal of the receiving sensor strip to the host computer according to the receiving instruction signal sent by the host computer; The excitation sensor strip includes: an excitation substrate strip and at least one excitation sensor group; the excitation substrate strip is a strip structure, and the excitation substrate strip has at least one hollow structure for placing the excitation sensor group; The receiving sensor strip includes: a receiving base strip and at least one receiving sensor group; the receiving base strip is a strip structure, and the receiving base strip has at least one hollow structure for placing the receiving sensor group; The bottom of the excitation sensor group is horizontally parallel to the bottom of the excitation substrate; the bottom of the receiving sensor group is horizontally parallel to the bottom of the receiving substrate. The receiving sensor group is a single-group dual-element sensor, which is a sensor containing two piezoelectric ceramic plates and a control switch.

2. The system as described in claim 1, characterized in that, The tank top defect detection system also includes: a communication repeater; The communication repeater is connected to the host computer, the signal exciter, and the signal acquisition device to perform signal transmission between the host computer and the signal exciter, and between the signal acquisition device and the host computer.

3. The system as described in claim 2, characterized in that, The communication repeater is connected to the host computer via a wired network, and the communication repeater is connected to the signal exciter and signal acquisition device via a wireless network.

4. The system as described in claim 1, characterized in that, The excitation substrate of the excitation sensor strip and the receiving substrate of the receiving sensor strip are made of flexible materials.

5. A method for detecting defects on the top of a tank, characterized in that, include: The steps for detecting defects on the tank top using the system described in any one of claims 1-4 are as follows: The top of the tank is divided into at least one detection area, and at least one excitation sensor strip and at least one receiving sensor strip are arranged in the detection area. The excitation signal device generates and outputs a corresponding first electrical signal based on the detection command signal sent by the host computer; The excitation sensor receives the first electrical signal and converts it into an acoustic signal that propagates on the top of the tank. The sensor receives the acoustic signal from the top of the tank and converts the collected acoustic signal into a second electrical signal. The signal acquisition instrument collects the second electrical signal according to the receive command signal sent by the host computer and transmits it to the host computer, where the host computer performs tank top defect analysis.

6. The method as described in claim 5, characterized in that, At least one excitation sensor strip and at least one receiving sensor strip are arranged in the detection area on the top of the tank, including: At least one excitation sensor strip and at least one receiving sensor strip are laid radially from the edge of the tank top towards the center of the tank top. The excitation sensor strip and the receiving sensor strip are arranged at intervals within the same detection area, and are parallel to each other or at a preset angle.

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