On-line monitoring method and device for corrosion depth of storage tank bottom plate

Abstract

The invention provides an online monitoring method and device for the corrosion depth of a storage tank bottom plate. The method comprises the steps that a to-be-monitored point of the storage tank bottom plate is determined, and an ultrasonic guided wave sensor probe used for monitoring the corrosion depth of the to-be-monitored point and the distance between the to-be-monitored point and the ultrasonic guided wave sensor probe are determined; regularly acquiring a detection curve of the ultrasonic guided wave sensor probe, and acquiring a vertical coordinate value when the horizontal coordinate is the interval in the detection curve; wherein the abscissa of the detection curve represents the distance between a point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the ordinate of the detection curve represents the signal amplitude; and determining the corrosion depth of the to-be-monitored point according to the spacing, the ordinate value and a pre-established relation curve among the spacing, the signal amplitude and the corrosion depth of the to-be-monitored point. According to the online monitoring method and device for the corrosion depth of the storage tank bottom plate, online monitoring of the corrosion depth of the storage tank bottom plate is achieved.

Description

Technical Field

[0001] This invention relates to the field of detection technology, and in particular to a method and device for online monitoring of corrosion depth of storage tank bottom plate. Background Technology

[0002] The bottom plate is the weakest point of the storage tank. Impurities such as water in the stored medium easily accumulate at the bottom, making this area most susceptible to corrosion and perforation. Statistical analysis of numerous testing cases has revealed that the edge plates of the bottom plate, due to their connection to the tank wall and relatively complex structure and stress distribution, are more prone to corrosion than the inner bottom plate. Furthermore, because they provide support for the tank wall, corrosion in this area poses a significant safety hazard.

[0003] Opening the tank for inspection requires shutting down production and cleaning, which is time-consuming and expensive. It is usually done periodically, which can lead to over-inspection or untimely inspection. Bottom plate leakage monitoring technology involves installing leak sensors, such as oil-sensing cables, on the foundation side of the tank bottom plate. This can only be installed during tank construction and cannot be used after the tank is put into operation.

[0004] Corrosion depth is an important parameter for monitoring the corrosion of tank bottom plates. How to monitor the corrosion depth of tank bottom plates without opening the tank or stopping production through online detection is of great significance to ensuring safe production. Summary of the Invention

[0005] This invention provides a method and apparatus for online monitoring of corrosion depth of tank bottom plates, which solves the shortcomings of existing technologies that cannot achieve online monitoring of corrosion depth of tank bottom plates, and realizes online monitoring of corrosion depth of tank bottom plates.

[0006] This invention provides an online monitoring method for corrosion depth of a storage tank bottom plate, comprising the following steps: determining a monitoring point on the storage tank bottom plate, determining an ultrasonic guided wave sensor probe for monitoring the corrosion depth of the monitoring point, and determining the distance between the monitoring point and the ultrasonic guided wave sensor probe; periodically acquiring the detection curve of the ultrasonic guided wave sensor probe, and acquiring the ordinate value of the detection curve when the horizontal axis is the distance; wherein, the horizontal axis of the detection curve represents the distance between a point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the ordinate of the detection curve represents the signal amplitude; determining the magnitude of the corrosion depth of the monitoring point based on the distance, the ordinate value, and a pre-established relationship curve between the distance, the signal amplitude, and the corrosion depth of the monitoring point.

[0007] According to the present invention, an online monitoring method for corrosion depth of a storage tank bottom plate is provided. The method for determining the monitoring point of the storage tank bottom plate includes: acquiring a detection curve using ultrasonic guided wave sensor probes distributed on the outer edge plate of the storage tank bottom plate; determining the echo distance of the echo generated by bottom plate corrosion based on the detection curve; for each ultrasonic guided wave sensor probe, drawing a circle with the location of the ultrasonic guided wave sensor probe as the center and the echo distance determined based on the detection curve of the ultrasonic guided wave sensor probe as the radius; obtaining the intersection point of the circles drawn based on each ultrasonic guided wave sensor probe located inside the storage tank, and using the intersection point as the monitoring point.

[0008] According to the present invention, a method for online monitoring of corrosion depth of tank bottom plate is provided, wherein determining the ultrasonic guided wave sensor probe for monitoring the corrosion depth of the monitoring point includes: obtaining the distance between the monitoring point and each of the ultrasonic guided wave sensor probes, and determining the ultrasonic guided wave sensor probe with the smallest distance value as the ultrasonic guided wave sensor probe for monitoring the corrosion depth of the monitoring point.

[0009] According to the present invention, an online monitoring method for corrosion depth of tank bottom plate is provided, wherein each of the ultrasonic guided wave sensor probes is pre-embedded in multiple preset positions on the outer edge plate of the tank bottom plate.

[0010] According to the present invention, an online monitoring method for corrosion depth of tank bottom plate is provided, before obtaining the ordinate value when the horizontal axis of the detection curve is the spacing, the method further includes: removing interference signals from the detection curve by noise reduction processing.

[0011] According to the present invention, an online monitoring method for corrosion depth of tank bottom plate is provided, the method further includes: pre-determining the relationship curve between the spacing, the signal amplitude and the corrosion depth of the monitoring point through experiments.

[0012] This invention also provides an online monitoring device for corrosion depth of a storage tank bottom plate, comprising the following modules: a determination module, used to: determine a monitoring point on the storage tank bottom plate, determine an ultrasonic guided wave sensor probe for monitoring the corrosion depth of the monitoring point, and the distance between the monitoring point and the ultrasonic guided wave sensor probe; an acquisition module, used to: periodically acquire the detection curve of the ultrasonic guided wave sensor probe, and acquire the ordinate value of the detection curve when the horizontal axis is the distance; wherein, the horizontal axis of the detection curve represents the distance between a point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the ordinate of the detection curve represents the signal amplitude; and an analysis module, used to: determine the magnitude of the corrosion depth of the monitoring point based on the distance, the ordinate value, and a pre-established relationship curve between the distance, the signal amplitude, and the corrosion depth of the monitoring point.

[0013] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the online monitoring method for corrosion depth of tank bottom plate as described above.

[0014] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the online monitoring method for corrosion depth of tank bottom plate as described above.

[0015] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the online monitoring method for corrosion depth of tank bottom plate as described above.

[0016] The present invention provides a method and apparatus for online monitoring of corrosion depth of tank bottom plates. This method determines the monitoring point on the tank bottom plate, the ultrasonic guided wave sensor probe used to monitor the corrosion depth of the monitoring point, and the distance between the monitoring point and the ultrasonic guided wave sensor probe. It periodically acquires the detection curve of the ultrasonic guided wave sensor probe and obtains the ordinate value of the detection curve when the horizontal axis represents the distance. The horizontal axis of the detection curve represents the distance between the point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the vertical axis represents the signal amplitude. Based on the distance, the ordinate value, and a pre-established relationship curve between the distance, signal amplitude, and the corrosion depth of the monitoring point, the corrosion depth of the monitoring point is determined, thus achieving online monitoring of the corrosion depth of the tank bottom plate. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a flowchart illustrating the online monitoring method for corrosion depth of tank bottom plates provided by the present invention.

[0019] Figure 2 This is a schematic diagram of the detection curve in the online monitoring method for corrosion depth of tank bottom plate provided by the present invention.

[0020] Figure 3 This is a schematic diagram of the arrangement of the ultrasonic guided wave sensor probe in the online monitoring method for corrosion depth of tank bottom plate provided by the present invention.

[0021] Figure 4This is a schematic diagram of the structure of the online monitoring device for corrosion depth of the tank bottom plate provided by the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0024] Figure 1 This is a schematic flowchart of the online monitoring method for corrosion depth of the tank bottom plate provided by the present invention. Figure 1 As shown, the method includes: Step S1: Determine the monitoring point on the bottom plate of the storage tank, determine the ultrasonic guided wave sensor probe used to monitor the corrosion depth of the monitoring point, and the distance between the monitoring point and the ultrasonic guided wave sensor probe.

[0025] The monitoring points are points on the tank bottom plate used for corrosion monitoring. These can be pre-set points, such as points on the bottom plate where corrosion has occurred, identified through prior testing. There can be multiple monitoring points. For each monitoring point, the ultrasonic guided wave sensor probe used to monitor the corrosion depth at that point, as well as the distance between the monitoring point and the ultrasonic guided wave sensor probe, are determined. One ultrasonic guided wave sensor probe can be used to monitor the monitoring point. Multiple ultrasonic guided wave sensor probes can be deployed to monitor the corrosion depth at multiple monitoring points.

[0026] Step S2: Periodically acquire the detection curve of the ultrasonic guided wave sensor probe, and acquire the ordinate value of the detection curve when the horizontal axis is the spacing; wherein, the horizontal axis of the detection curve represents the distance between the point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the ordinate of the detection curve represents the signal amplitude.

[0027] Regularly obtain the detection curves of the ultrasonic guided wave sensor probe. If the ultrasonic guided wave encounters corrosion points during transmission, an echo will be generated, which can be identified in the detection curve. Echoes caused by weld seams will also be generated during ultrasonic guided wave transmission, but the echo generated at the monitoring point is caused by corrosion of the base plate.

[0028] Figure 2This is a schematic diagram of the detection curve in the online monitoring method for corrosion depth of tank bottom plates provided by this invention. The horizontal axis of the detection curve represents the distance between a point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the vertical axis represents the signal amplitude, which can be expressed as a voltage value. In the detection curve, the location where the echo is generated has a significant amplitude, which can be used to determine the echo distance, that is, the distance between the point where the echo is generated and the ultrasonic guided wave sensor probe.

[0029] The vertical coordinate value of the detection curve is obtained when the horizontal axis is the distance between the point to be monitored and the ultrasonic guided wave sensor probe used to monitor the point to be monitored, which is also the value of the signal amplitude.

[0030] Step S3: Determine the corrosion depth of the monitoring point based on the spacing, the ordinate value, and the pre-established relationship curve between the spacing, the signal amplitude, and the corrosion depth of the monitoring point.

[0031] A relationship curve can be pre-established between the distance between the point to be monitored and the ultrasonic guided wave sensor probe used to monitor the point, the signal amplitude on the horizontal axis of the ultrasonic guided wave sensor's detection curve at that distance, and the corrosion depth of the point to be monitored. Then, based on the two elements already determined in the relationship curve, the third element can be determined.

[0032] Since the distance between the point to be monitored and the ultrasonic guided wave sensor probe used to monitor the point to be monitored is known, and the horizontal axis of the ultrasonic guided wave sensor's detection curve is the vertical axis value at that distance, that is, the value of the signal amplitude has been obtained, the corrosion depth of the point to be monitored can be determined based on the relationship curve of the above three factors.

[0033] The present invention provides an online monitoring method for corrosion depth of tank bottom plates. This method determines the monitoring point on the tank bottom plate, the ultrasonic guided wave sensor probe used to monitor the corrosion depth of the monitoring point, and the distance between the monitoring point and the ultrasonic guided wave sensor probe. It periodically acquires the detection curve of the ultrasonic guided wave sensor probe and obtains the ordinate value of the detection curve when the horizontal axis represents the distance. The horizontal axis of the detection curve represents the distance between the point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the vertical axis represents the signal amplitude. Based on the distance, the ordinate value, and a pre-established relationship curve between the distance, signal amplitude, and corrosion depth of the monitoring point, the corrosion depth of the monitoring point is determined, thus achieving online monitoring of the corrosion depth of the tank bottom plate.

[0034] According to the present invention, an online monitoring method for corrosion depth of a storage tank bottom plate is provided. The method for determining the monitoring point of the storage tank bottom plate includes: acquiring a detection curve using ultrasonic guided wave sensor probes distributed on the outer edge plate of the storage tank bottom plate; determining the echo distance of the echo generated by bottom plate corrosion based on the detection curve; for each ultrasonic guided wave sensor probe, drawing a circle with the location of the ultrasonic guided wave sensor probe as the center and the echo distance determined based on the detection curve of the ultrasonic guided wave sensor probe as the radius; obtaining the intersection point of the circles drawn based on each ultrasonic guided wave sensor probe located inside the storage tank, and using the intersection point as the monitoring point.

[0035] When determining the monitoring points on the bottom plate of the storage tank, the monitoring points are determined by the detection curves obtained from multiple distributed ultrasonic guided wave sensor probes.

[0036] Multiple ultrasonic guided wave sensor probes are distributed on the outer edge plate of the tank bottom plate, and the detection curves of each probe are acquired. The echo distance of the echo generated by the bottom plate corrosion in the detection curve of each probe is identified, that is, the distance between the point of bottom plate corrosion and the ultrasonic guided wave sensor probe. In a single detection curve, there may be multiple echo distances generated by bottom plate corrosion, meaning that multiple corrosion points produce echo signals.

[0037] For each ultrasonic guided wave sensor probe, a circle is drawn with the probe's location as the center and the echo distance determined based on the probe's detection curve as the radius. If the probe's detection curve identifies n echo distances caused by substrate corrosion, then the circles drawn with the probe's location as the center and the echo distance determined based on the probe's detection curve as the radius are n concentric circles.

[0038] The circle drawn by a single ultrasonic guided wave sensor probe cannot pinpoint the corrosion point. This embodiment uses circles drawn by multiple ultrasonic guided wave sensor probes to locate the corrosion point. The corrosion point is the intersection of the circles drawn by the multiple ultrasonic guided wave sensor probes. Online monitoring of the corrosion point is required. Since the corrosion of the bottom plate is caused by the medium stored in the tank, the corrosion point usually occurs inside the tank. Therefore, the intersection of the circles drawn by each ultrasonic guided wave sensor probe located inside the tank is obtained and used as the monitoring point.

[0039] The online monitoring method for corrosion depth of storage tank bottom plates provided by this invention utilizes ultrasonic guided wave sensor probes distributed on the outer edge plate of the storage tank bottom plate to obtain detection curves. Based on the detection curves, the echo distance of the echo generated by bottom plate corrosion is determined. For each ultrasonic guided wave sensor probe, a circle is drawn with the location of the ultrasonic guided wave sensor probe as the center and the echo distance determined based on the detection curve of the ultrasonic guided wave sensor probe as the radius. The intersection point of the circles drawn based on each ultrasonic guided wave sensor probe located inside the storage tank is obtained, and the intersection point is used as the monitoring point, thus achieving accurate determination of the monitoring point.

[0040] According to the present invention, a method for online monitoring of corrosion depth of tank bottom plate is provided, wherein determining the ultrasonic guided wave sensor probe for monitoring the corrosion depth of the monitoring point includes: obtaining the distance between the monitoring point and each of the ultrasonic guided wave sensor probes, and determining the ultrasonic guided wave sensor probe with the smallest distance value as the ultrasonic guided wave sensor probe for monitoring the corrosion depth of the monitoring point.

[0041] The closer the ultrasonic guided wave sensor probe is to the point to be monitored, the higher the signal strength and the less interference it receives. Therefore, when determining the ultrasonic guided wave sensor probe used to monitor the corrosion depth of the point to be monitored, the distance between the point to be monitored and each ultrasonic guided wave sensor probe is obtained, and the ultrasonic guided wave sensor probe with the smallest distance value is selected as the ultrasonic guided wave sensor probe used to monitor the corrosion depth of the point to be monitored.

[0042] The online monitoring method for corrosion depth of tank bottom plates provided by this invention improves the accuracy of determining the ultrasonic guided wave sensor probe used to monitor the corrosion depth of the monitoring point by obtaining the distance between the monitoring point and each ultrasonic guided wave sensor probe and determining the ultrasonic guided wave sensor probe with the smallest distance value. This improves the accuracy of the online monitoring results of corrosion depth of tank bottom plates.

[0043] According to the present invention, an online monitoring method for corrosion depth of tank bottom plate is provided, wherein each of the ultrasonic guided wave sensor probes is pre-embedded in multiple preset positions on the outer edge plate of the tank bottom plate.

[0044] Figure 3 This is a schematic diagram showing the arrangement of the ultrasonic guided wave sensor probe in the online monitoring method for corrosion depth of the tank bottom plate provided by this invention. Figure 3As shown, each ultrasonic guided wave sensor probe is pre-embedded in multiple preset positions on the outer edge plate of the tank bottom plate. These preset positions can be defined as each individual outer edge plate or selected key monitoring areas. The ultrasonic guided wave sensor probes are pre-embedded in multiple preset positions on the outer edge plate of the tank bottom plate, with the probes close to the upper surface of the outer edge plate and covered with a waterproof and anti-corrosion coating. The connection ports between the probes and the machine are exposed.

[0045] The online monitoring method for corrosion depth of tank bottom plate provided by the present invention facilitates the execution of online monitoring by pre-embedding each ultrasonic guided wave sensor probe at multiple preset positions on the outer edge plate of the tank bottom plate.

[0046] According to the present invention, an online monitoring method for corrosion depth of tank bottom plate is provided, before obtaining the ordinate value when the horizontal axis of the detection curve is the spacing, the method further includes: removing interference signals from the detection curve by noise reduction processing.

[0047] Noise may also be present in the detection signal, affecting subsequent analysis and processing. Therefore, before obtaining the ordinate value where the horizontal axis represents the interval in the detection curve, noise reduction processing is performed to remove interference signals from the detection curve. This noise reduction processing can be performed before or after filtering.

[0048] The online monitoring method for corrosion depth of tank bottom plates provided by this invention further improves the accuracy of online monitoring of corrosion depth of tank bottom plates by removing interference signals through noise reduction processing of the detection curve.

[0049] According to the present invention, an online monitoring method for corrosion depth of tank bottom plate is provided, the method further includes: pre-determining the relationship curve between the spacing, the signal amplitude and the corrosion depth of the monitoring point through experiments.

[0050] Multiple sets of values ​​for the distance between the monitoring point and the ultrasonic guided wave sensor probe used to monitor the monitoring point, the signal amplitude at that distance on the horizontal axis of the ultrasonic guided wave sensor's detection curve, and the corrosion depth of the monitoring point can be established in advance through experiments. These multiple sets of values ​​for the three parameters are then fitted to obtain the relationship curve between the distance between the monitoring point and the ultrasonic guided wave sensor probe, the signal amplitude, and the corrosion depth of the monitoring point. Based on this relationship curve, an expression for the relationship curve can be determined, and the value of the third element can be determined based on two known elements.

[0051] Among them, when establishing multiple sets of values ​​for the distance between the point to be monitored and the ultrasonic guided wave sensor probe used to monitor the point to be monitored, the signal amplitude when the horizontal axis of the ultrasonic guided wave sensor detection curve is the distance, and the corrosion depth of the point to be monitored through experiments, these multiple sets of values ​​can be obtained based on the detection curve of the ultrasonic guided wave sensor probe.

[0052] The online monitoring method for corrosion depth of tank bottom plates provided by this invention lays the foundation for determining corrosion depth by pre-determining the relationship curve between spacing, signal amplitude and corrosion depth of the monitoring point through experiments.

[0053] The online monitoring device for corrosion depth of tank bottom plate provided by the present invention is described below. The online monitoring device for corrosion depth of tank bottom plate described below can be referred to in correspondence with the online monitoring method for corrosion depth of tank bottom plate described above.

[0054] Figure 4 This is a schematic diagram of the online monitoring device for corrosion depth of the tank bottom plate provided by the present invention. Figure 4 As shown, the device includes a determining module 10, an acquiring module 20, and an analyzing module 30. The determining module 10 is used to: determine the monitoring point on the bottom plate of the storage tank, determine the ultrasonic guided wave sensor probe used to monitor the corrosion depth of the monitoring point, and the distance between the monitoring point and the ultrasonic guided wave sensor probe. The acquiring module 20 is used to: periodically acquire the detection curve of the ultrasonic guided wave sensor probe, and acquire the ordinate value of the detection curve when the horizontal axis is the distance; wherein the horizontal axis of the detection curve represents the distance between a point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the vertical axis of the detection curve represents the signal amplitude. The analyzing module 30 is used to: determine the corrosion depth of the monitoring point based on the distance, the ordinate value, and a pre-established relationship curve between the distance, the signal amplitude, and the corrosion depth of the monitoring point.

[0055] The online monitoring device for corrosion depth of tank bottom plates provided by this invention determines the monitoring point of the tank bottom plate, the ultrasonic guided wave sensor probe used to monitor the corrosion depth of the monitoring point, and the distance between the monitoring point and the ultrasonic guided wave sensor probe. It periodically acquires the detection curve of the ultrasonic guided wave sensor probe and obtains the ordinate value of the detection curve when the horizontal axis represents the distance. The horizontal axis of the detection curve represents the distance between the point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the vertical axis represents the signal amplitude. Based on the distance, the ordinate value, and a pre-established relationship curve between the distance, signal amplitude, and corrosion depth of the monitoring point, the magnitude of the corrosion depth of the monitoring point is determined, thus realizing online monitoring of the corrosion depth of the tank bottom plate.

[0056] Figure 5An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 5 As shown, the electronic device may include: a processor 510, a communication interface 520, a memory 530, and a communication bus 540, wherein the processor 510, the communication interface 520, and the memory 530 communicate with each other through the communication bus 540. The processor 510 can call logical instructions in the memory 530 to execute an online monitoring method for the corrosion depth of the tank bottom plate. This method includes: determining a monitoring point on the tank bottom plate; determining an ultrasonic guided wave sensor probe for monitoring the corrosion depth of the monitoring point; determining the distance between the monitoring point and the ultrasonic guided wave sensor probe; periodically acquiring the detection curve of the ultrasonic guided wave sensor probe; and acquiring the ordinate value of the detection curve when the horizontal axis is the distance; wherein the horizontal axis of the detection curve represents the distance between a point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the ordinate of the detection curve represents the signal amplitude; and determining the magnitude of the corrosion depth of the monitoring point based on the distance, the ordinate value, and a pre-established relationship curve between the distance, the signal amplitude, and the corrosion depth of the monitoring point.

[0057] Furthermore, the logical instructions in the aforementioned memory 530 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0058] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the online monitoring method for corrosion depth of tank bottom plates provided by the above methods. The method includes: determining a monitoring point on the tank bottom plate, determining an ultrasonic guided wave sensor probe for monitoring the corrosion depth of the monitoring point, and the distance between the monitoring point and the ultrasonic guided wave sensor probe; periodically acquiring the detection curve of the ultrasonic guided wave sensor probe, and acquiring the ordinate value of the detection curve when the horizontal axis is the distance; wherein, the horizontal axis of the detection curve represents the distance between a point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the ordinate of the detection curve represents the signal amplitude; determining the magnitude of the corrosion depth of the monitoring point based on the distance, the ordinate value, and a pre-established relationship curve between the distance, the signal amplitude, and the corrosion depth of the monitoring point.

[0059] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements the online monitoring method for corrosion depth of tank bottom plates provided by the methods described above. The method includes: determining a monitoring point on the tank bottom plate, determining an ultrasonic guided wave sensor probe for monitoring the corrosion depth of the monitoring point, and the distance between the monitoring point and the ultrasonic guided wave sensor probe; periodically acquiring the detection curve of the ultrasonic guided wave sensor probe, and acquiring the ordinate value of the detection curve when the horizontal axis is the distance; wherein the horizontal axis of the detection curve represents the distance between a point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the ordinate of the detection curve represents the signal amplitude; determining the magnitude of the corrosion depth of the monitoring point based on the distance, the ordinate value, and a pre-established relationship curve between the distance, the signal amplitude, and the corrosion depth of the monitoring point.

[0060] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0061] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An on-line method for monitoring the corrosion depth of a tank floor, characterized in that, include: The monitoring point on the bottom plate of the storage tank is determined, as are the ultrasonic guided wave sensor probes used to monitor the corrosion depth of the monitoring points and the distance between the monitoring points and the ultrasonic guided wave sensor probes. The detection curve of the ultrasonic guided wave sensor probe is periodically acquired, and the ordinate value of the detection curve when the horizontal axis is the distance is obtained; wherein, the horizontal axis of the detection curve represents the distance between a point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the ordinate of the detection curve represents the signal amplitude. The corrosion depth of the monitoring point is determined based on the spacing, the ordinate value, and a pre-established relationship curve between the spacing, the signal amplitude, and the corrosion depth of the monitoring point.

2. The method of claim 1, wherein The determination of the monitoring points on the bottom plate of the storage tank includes: The detection curve is obtained by using ultrasonic guided wave sensor probes distributed on the outer edge plate of the bottom plate of the storage tank. The echo distance of the echo generated by the corrosion of the base plate is determined based on the detection curve. For each of the ultrasonic guided wave sensor probes, a circle is drawn with the location of the ultrasonic guided wave sensor probe as the center and the echo distance determined based on the detection curve of the ultrasonic guided wave sensor probe as the radius. Obtain the intersection point of the circles drawn based on each of the ultrasonic guided wave sensor probes located inside the storage tank, and use the intersection point as the monitoring point.

3. The method of claim 2, wherein, The ultrasonic guided wave sensor probe used to monitor the corrosion depth of the monitored point includes: The distance between the point to be monitored and each of the ultrasonic guided wave sensor probes is obtained, and the ultrasonic guided wave sensor probe with the smallest distance value is determined to be the ultrasonic guided wave sensor probe used to monitor the corrosion depth of the point to be monitored.

4. The method of claim 2, wherein Each of the ultrasonic guided wave sensor probes is pre-embedded in multiple preset positions on the outer edge plate of the tank bottom plate.

5. The method for online monitoring of corrosion depth of tank bottom plate according to claim 1, characterized in that, Before obtaining the ordinate value of the detection curve when the horizontal axis is the spacing, the method further includes: The detection curve is processed to remove interference signals.

6. The method for online monitoring of corrosion depth of tank bottom plate according to claim 1, characterized in that, The method further includes: pre-determining the relationship curve between the spacing, the signal amplitude, and the corrosion depth of the point to be monitored through experiments.

7. An online monitoring device for corrosion depth of storage tank bottom plate, characterized in that, include: The determination module is used to: determine the monitoring point on the bottom plate of the storage tank, determine the ultrasonic guided wave sensor probe used to monitor the corrosion depth of the monitoring point, and the distance between the monitoring point and the ultrasonic guided wave sensor probe. The acquisition module is used to: periodically acquire the detection curve of the ultrasonic guided wave sensor probe, and acquire the ordinate value of the detection curve when the horizontal axis is the spacing; wherein, the horizontal axis of the detection curve represents the distance between a point in the ultrasonic guided wave transmission path and the ultrasonic guided wave sensor probe, and the ordinate of the detection curve represents the signal amplitude; The analysis module is used to determine the corrosion depth of the monitoring point based on the spacing, the ordinate value, and a pre-established relationship curve between the spacing, the signal amplitude, and the corrosion depth of the monitoring point.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the online monitoring method for corrosion depth of the tank bottom plate as described in any one of claims 1 to 6.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the online monitoring method for corrosion depth of the tank bottom plate as described in any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the online monitoring method for corrosion depth of the tank bottom plate as described in any one of claims 1 to 6.

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