Method and device for high speed rail flaw detection

Abstract

The application discloses a kind of steel rail high-speed flaw detection detection method and device, wherein the method includes: transmitting flaw detection scanning instruction to probe wheel wafer excitation system by emitting coding unit, the instruction includes the preset current scanning corresponding excitation number, the time coding of each excitation pulse and the excitation time interval of current scanning;The time coding of each excitation pulse is transmitted to echo analysis unit;The excitation time interval of each scanning is different;Excitation system carries out the excitation of ultrasonic wafer according to the instruction, scans the steel rail to be detected, and the echo and time characteristics obtained by current scanning are sent to echo analysis unit;Analysis unit obtains steel rail flaw detection abnormality detection result when each two echo peak values exceed steel rail damage threshold value and the time interval of two echo peak values is consistent with the interval of current scanning.This application can avoid the misjudgment of damage caused by phantom wave or interference, reduce false alarm, realize efficient and accurate steel rail high-speed flaw detection.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nondestructive testing, in particular to a rail high-speed flaw detection method and device. BACKGROUND

[0002] This section is intended to provide background information to facilitate a better understanding of embodiments of the present application described in the claims. The description herein does not constitute admission of prior art.

[0003] As one of the important components of high-speed railway, the service state of the rail will directly affect the safety of high-speed railway transportation. The damage of the rail may cause the destruction of the rail structure, and in severe cases, it may lead to rail breakage and endanger the safety of train operation.

[0004] The main means for the railway maintenance department to find damage is the ultrasonic flaw detection system carried by the rail flaw detection vehicle. For the damage reported by the flaw detection vehicle, manual on-site review is needed to use the hand-held flaw detection instrument, which is low in efficiency and high in labor intensity. Therefore, it is necessary to reduce false positives to enhance the credibility of the flaw detection vehicle and reduce the work intensity of the on-site review personnel.

[0005] The existing rail high-speed flaw detection vehicle adopts a multi-channel probe pre-installed in the detection wheel, as shown in Figure 1 , which uses each probe in the wheel to scan the corresponding area of the rail, and makes a damage decision based on the corresponding echo. For example, the forward 45-degree echo of a certain detection is as shown in Figure 2 , at this time the decision threshold is 40%, the time gate is between 4000-6000 points (50MHz sampling), and the time gate width is 40us. At this time, the B-scan point is formed on the B-scan image, and the playback personnel will make a damage decision according to the trend of the B-scan image.

[0006] However, in the existing detection technology, when the speed exceeds a certain value, the normal echo of the last scan will enter the echo receiving window of the next scan (known as ghost echo in the industry), so it is necessary for the human to analyze and judge whether the received echo is a damage echo and to perform subsequent on-site review. This will cause confusion to the flaw detection personnel, cause suspicion of the flaw detection equipment, and increase the work intensity of the on-site review personnel. SUMMARY

[0007] The embodiments of the present application provide a rail high-speed flaw detection method for efficiently and accurately performing rail high-speed flaw detection, which comprises:

[0008] The transmitting coding unit sends a rail high-speed flaw detection scanning instruction to the probe wheel wafer excitation system, the instruction including preset excitation times corresponding to the current scanning, time coding of each excitation pulse and excitation time interval of the current scanning; the time coding of each excitation pulse is transmitted to the echo analysis unit; wherein the excitation time interval of each scanning is different;

[0009] The probe wheel wafer excitation system excites the ultrasonic wafer according to the rail high-speed flaw detection scanning instruction, scans the rail to be detected, and sends the echo obtained in the current scanning and the time characteristics of the echo to the echo analysis unit;

[0010] The echo analysis unit obtains an abnormal detection result of the rail high-speed flaw detection when each of the two echo peaks exceeds the preset rail damage threshold and the time interval of the two echo peaks determined according to the time characteristics of the echo is consistent with the excitation time interval of the current scanning determined according to the time coding of each excitation pulse.

[0011] The embodiment of the present application also provides a rail high-speed flaw detection device for efficiently and accurately performing rail high-speed flaw detection, the device comprising:

[0012] A transmitting coding unit is configured to send a rail high-speed flaw detection scanning instruction to the probe wheel wafer excitation system, the instruction including preset excitation times corresponding to the current scanning, time coding of each excitation pulse and excitation time interval of the current scanning; the time coding of each excitation pulse is transmitted to the echo analysis unit; wherein the excitation time interval of each scanning is different;

[0013] A probe wheel wafer excitation system is configured to excite the ultrasonic wafer according to the rail high-speed flaw detection scanning instruction, scan the rail to be detected, and send the echo obtained in the current scanning and the time characteristics of the echo to the echo analysis unit;

[0014] An echo analysis unit is configured to obtain an abnormal detection result of the rail high-speed flaw detection when each of the two echo peaks exceeds the preset rail damage threshold and the time interval of the two echo peaks determined according to the time characteristics of the echo is consistent with the excitation time interval of the current scanning determined according to the time coding of each excitation pulse.

[0015] The embodiment of the present application also provides a computer device, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the rail high-speed flaw detection method when executing the computer program.

[0016] The embodiment of the present application also provides a computer readable storage medium, which stores a computer program, and the computer program is executable on the processor to implement the rail high-speed flaw detection method.

[0017] The embodiment of the present application also provides a computer program product, which comprises a computer program, and the computer program is executed by a processor to realize the rail high-speed flaw detection method.

[0018] The rail high-speed flaw detection scheme provided by the embodiment of the present application has the following advantages: the rail high-speed flaw detection scheme is provided by adding a time coding feature, which can effectively filter out phantom waves and interference and identify real damage waves, thereby reducing the working time of a playback personnel, reducing unnecessary analysis time and on-site review work, improving flaw detection efficiency, reducing labor intensity, improving flaw detection accuracy and reliability, and effectively reducing rail maintenance and repair costs.

[0019] Therefore, compared with the prior art, in which the increase of scanning frequency compresses the time interval of scanning, so that normal echoes through a certain path will enter the detection time gate of the next scanning, which will cause the emergence of non-existing B points, produce false positives, and affect the accuracy and efficiency of flaw detection, the rail high-speed flaw detection scheme provided by the embodiment of the present application has the following advantages: a rail high-speed flaw detection scheme with a time coding feature is provided, which can effectively filter out phantom waves and interference and identify real damage waves, thereby reducing the working time of a playback personnel, reducing unnecessary analysis time and on-site review work, improving flaw detection efficiency, reducing labor intensity, improving flaw detection accuracy and reliability, and effectively reducing rail maintenance and repair costs. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0021] Figure 1 It is a sensor distribution diagram in the rail flaw detection car probe wheel in the embodiment of the present application;

[0022] Figure 2 It is a schematic diagram of a forward 45-degree spiral echo in the embodiment of the present application;

[0023] Figure 3 The structural schematic diagram of the rail high-speed flaw detection device with time coding in the embodiment of the present application is shown in Fig. 1.

[0024] Figure 4a The schematic diagram of twice excitation pulses with time characteristics in the N+1th scanning in the embodiment of the present application is shown in Fig. 2.

[0025] Figure 4b The schematic diagram of twice excitation pulses with time characteristics in the N+2th scanning in the embodiment of the present application is shown in Fig. 3.

[0026] Figure 5 The schematic diagram of rail bottom damage echo with 5us interval excitation of the actual 45-degree probe in the embodiment of the present application is shown in Fig. 4.

[0027] Figure 6a The schematic diagram of thrice excitation pulses with time characteristics in the N+1th scanning in the embodiment of the present application is shown in Fig. 5.

[0028] Figure 6b The schematic diagram of thrice excitation pulses with time characteristics in the N+2th scanning in the embodiment of the present application is shown in Fig. 6.

[0029] Figure 7 The flowchart of the rail high-speed flaw detection method in the embodiment of the present application is shown in Fig. 7. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiment of the present application more clear and explicit, the embodiment of the present application is further described in detail below in combination with the drawings. Herein, the schematic embodiment of the present application and its description are used to explain the present application, but not as the limitation of the present application.

[0031] Considering the technical problems existing in the prior art, the embodiment of the present application provides a rail high-speed flaw detection scheme, which is a rail high-speed flaw detection scheme with time coding characteristics. The scheme is a high-speed detection and identification scheme for in-service rail damage, and solves the technical problem that it is unable to distinguish whether a echo is the damage echo of this time, interference or the normal echo of the last time entering the detection window of this time in the prior art. The situation of the inventor discovering the technical problem is introduced below.

[0032] The rail flaw detection method introduced in the background art has no problem in detection at low speed. However, in the case of high speed (generally, a speed greater than 60 km / h), in order to realize high-speed flaw detection and ensure detection accuracy, the scanning frequency needs to be increased. The increase of the scanning frequency compresses the time interval of scanning, so that the normal echo passing through a certain path will be just in the detection time gate of the next scanning, which will cause the appearance of a non-existing B echo point, resulting in false reporting and affecting the accuracy of flaw detection. That is, the echo exceeding the threshold received this time may be the echo of the excitation of the last scanning entering the detection time gate of this time through a certain propagation path, and the echo is actually not a damage wave but a normal reflection at a certain position, which just appears in the detection time gate of the next scanning through a specific path. Such false reporting is specific to high-speed flaw detection and is generally referred to as phantom wave.

[0033] In order to solve the above technical problems, in the embodiment of the present application, different time coding excitation pulses are used in scanning (assuming that one scanning includes three excitations, the time interval between the first excitation and the second excitation is t11, the time interval between the second excitation and the third excitation is t22, t11 and t22 can be the same or different, and the interval between each two excitations can be a preset unique time feature), so that the corresponding echo is marked (i.e., the time of receiving the echo is recorded). Only the interval time consistent with the coding of this excitation is the real damage echo, for example, the time interval between the first excitation and the second excitation is 20 us, and only the two echoes with a time interval of 0.01 s are matched and effective echoes. The time coding can include the number of excitations, the number of pulses of each excitation and the time interval between each excitation.

[0034] In order to facilitate understanding of how the present application is implemented, it is agreed herein that one scanning is one flaw detection of an ultrasonic wave on a segment of a rail, and one excitation is one continuous excitation of a high-voltage pulse. One scanning can include at least two excitations on the wafer.

[0035] In the embodiment of the present application, the time interval of multiple excitations of each scanning needs to be set. In the pulse excitation of rail flaw detection scanning, pulse excitation and time feature writing (i.e., the output of the excitation pulse with time feature to the flaw detection wafer) are realized at the same time, which lays the foundation for the analysis and identification of phantom wave echo.

[0036] In the embodiment of the present application, the time interval between the excitation pulses of each scanning is different and is set according to the predetermined time coding, so that the echo carries specific time feature information, which is equivalent to marking for identifying the phantom wave.

[0037] In the embodiment of the present application, the time interval of the multiple echoes exceeding the threshold value is identified for each received echo to determine whether the echo is formed by the current scan or the previous or the previous previous scan, and thus to determine whether it is a ghost wave or interference.

[0038] In the embodiment of the present application, the identification method of the time interval between the multiple peaks of the echo includes, but is not limited to, the peak point time measurement method and the correlation peak extraction method of specific interval echo samples, and the like time interval matching algorithm.

[0039] The steel rail high-speed flaw detection scheme will be described in detail below.

[0040] Figure 7 The flowchart of the steel rail high-speed flaw detection method in the embodiment of the present application is shown in FIG. 1, which comprises the following steps: Figure 7

[0041] Step 101: The transmitting coding unit sends a steel rail high-speed flaw detection scan instruction to the probe wheel chip excitation system, wherein the instruction includes a preset excitation number corresponding to the current scan, a time code of each excitation pulse, and an excitation time interval of the current scan; the time code of each excitation pulse is transmitted to the echo analysis unit; wherein the excitation time interval of each scan is different;

[0042] Step 102: The probe wheel chip excitation system excites the ultrasonic chip according to the steel rail high-speed flaw detection scan instruction to scan the steel rail to be detected, and sends the echo obtained by the current scan and the time characteristics of the echo to the echo analysis unit;

[0043] Step 103: The echo analysis unit obtains an abnormal detection result of the steel rail high-speed flaw detection when each of the two echo peaks exceeds the preset steel rail damage threshold value, and the time interval of the two echo peaks determined according to the time characteristics of the echo is consistent with the excitation time interval of the current scan determined according to the time code of each excitation pulse.

[0044] ​The rail high-speed flaw detection scheme provided by the embodiment of the present application, when working: the transmitting coding unit sends a rail high-speed flaw detection scanning instruction to the probe wheel wafer excitation system, the instruction including preset excitation times corresponding to the current scanning, time coding of each excitation pulse and excitation time interval of the current scanning; the time coding of each excitation pulse is transmitted to the echo analysis unit; wherein the excitation time interval of each scanning is different; the probe wheel wafer excitation system excites the ultrasonic wafer according to the rail high-speed flaw detection scanning instruction, scans the rail to be detected, and sends the echo obtained in the current scanning and the time characteristics (recorded time of received echo) of the echo to the echo analysis unit; the echo analysis unit obtains an abnormal detection result of the rail high-speed flaw detection when each of two echo peaks exceeds a preset rail damage threshold and the time interval of the two echo peaks determined according to the time characteristics of the echo is consistent with the excitation time interval of the current scanning determined according to the time coding of each excitation pulse.

[0045] Compared with the prior art in which the increase of scanning frequency compresses the time interval of scanning, so that the normal echo through a certain path will enter the detection time gate of the next scanning, which will cause the appearance of the non-existing B display point, resulting in false positives, affecting the accuracy and efficiency of the flaw detection, the embodiment of the present application provides a rail high-speed flaw detection scheme with time coding characteristics, which can effectively filter out ghost waves and interference and identify the real damage echo, thereby reducing the working time of the playback personnel, reducing unnecessary analysis time and on-site review work, improving the flaw detection efficiency, reducing the labor intensity, improving the accuracy and reliability of the flaw detection, and effectively reducing the rail maintenance and repair cost.

[0046] In one embodiment, the rail high-speed flaw detection method described above can further include: the echo analysis unit adding the abnormal detection result to the B display.

[0047] In specific implementation, the echo analysis unit adds the abnormal detection result to the B display, as shown in the "B display generation" in Figure 3 The rail high-speed flaw detection result can be directly displayed to the staff, improving the convenience of the rail high-speed flaw detection.

[0048] In one embodiment, the rail high-speed flaw detection method described above can further include: the echo analysis unit determining that the two echoes are ghost waves or interference and discarding the two echoes when each of two echo peaks exceeds a preset rail damage threshold and the time interval of the two echo peaks determined according to the time characteristics of the echo is inconsistent with the excitation time interval of the current scanning.

[0049] In the embodiment, the echo analysis unit determines that the two echoes are ghost echoes or interference when each of the two echo peaks exceeds the preset rail damage threshold and the time interval of the two echo peaks determined according to the time characteristics of the echoes is inconsistent with the excitation time interval of the current scan, and the two echoes are discarded, so that the accuracy of the rail high-speed detection can be further improved.

[0050] In one embodiment, the echo analysis unit determines the time interval of the two echo peaks by using, but not limited to, the peak point time measurement method or the correlation peak extraction method of the interval echo samples.

[0051] In the embodiment, the echo analysis unit determines the time interval of the two echo peaks by using the peak point time measurement method or the correlation peak extraction method of the interval echo samples, so that the accuracy of the rail high-speed detection can be further improved.

[0052] In order to facilitate understanding of how the present application is implemented, an example is described below.

[0053] As Figure 3 the transmission encoding unit in the embodiment transmits the time encoding of the current excitation to the echo analysis unit, the echo analysis unit searches the received echoes for echoes consistent with the time interval of the current excitation, and if the echoes are consistent, they are considered to be valid damage echoes, and if the echoes are inconsistent, they are discarded and do not form valid B echoes, so that ghost echoes and external interference can be filtered out and false positives can be reduced.

[0054] The detection process of the present application is described below by taking one scan completed by two excitations as an example.

[0055] 1. The first excitation and the second excitation of the ultrasonic wafer are performed according to the time interval between the multiple pulses of the N+1th scan, and the excitation interval t1 is recorded, as shown in Figure 4a .

[0056] 2. The echo signals generated by the N+1th scan are received and analyzed for the equal-interval echo peaks according to the excitation interval t1, if both of the peaks exceed the threshold and the peak interval matches t1, the two peaks are considered to be valid echoes, not ghost echoes or interference, and are added to the B echo image, otherwise, the two peaks are ghost echoes or interference and need to be discarded, and are not added to the B echo image.

[0057] 3. The ultrasonic wafer is excited according to the time interval between the multiple pulses of the N+2th scan, and the time interval t2 of the two excitations is recorded, and the excitation pulses are performed according to Figure 4b .

[0058] 4. Receive the generated echo signal of the N+2th scanning, and resolve the echo peak value at the interval t2, if both peaks exceed the threshold value and the interval of the peaks matches t2, then the two peaks are considered as valid echo and are added to the B-scan, otherwise, they are discarded as ghost peaks, and so on.

[0059] 5. As shown in the actual scanning, the echo of the rail damage is generated by two pulses with an interval of 5us, so as to determine whether the received echo is valid B-scan point or ghost peak by judging whether the peak value exceeds the threshold value and the interval of the peaks matches the interval of the excitation. Figure 5

[0060] As shown in the actual scanning, the echo of the rail damage is generated by two pulses with an interval of 5us, so as to determine whether the received echo is valid B-scan point or ghost peak by judging whether the peak value exceeds the threshold value and the interval of the peaks matches the interval of the excitation. Figure 6a Figure 6b As shown in the actual scanning, the echo of the rail damage is generated by two pulses with an interval of 5us, so as to determine whether the received echo is valid B-scan point or ghost peak by judging whether the peak value exceeds the threshold value and the interval of the peaks matches the interval of the excitation.

[0061] In summary, in view of the fact that the technical means for identifying ghost peaks is insufficient in the railway maintenance department of China, and the existing rail defect detection technology cannot eliminate the influence of ghost peaks on the detection, the embodiment of the present application provides a rail high-speed defect detection method with time coding features. The ghost peaks and interference can be effectively filtered out, the false positives are reduced, and the reliability of the defect detection equipment is enhanced. On the one hand, the working time of the playback personnel can be reduced, unnecessary analysis time and on-site review work can be reduced, the defect detection efficiency is improved, the labor intensity is reduced, the reliability of the defect detection is improved, and the rail maintenance and repair cost is effectively reduced.

[0062] The embodiment of the present application can identify ghost peaks by identifying the time interval of a plurality of adjacent echo peaks in the received echo. Only the echo with the same time interval as the excitation coding of the current scanning is the real damage echo. The advantages of the embodiment of the present application include:

[0063] 1. The existing rail defect detection system is not changed too much, only the pulse emission control unit and the damage identification algorithm are improved, and almost no hardware change is needed. The identification of ghost peaks and interference can be realized by upgrading the detection software, the damage detection rate is improved, and the false positives are reduced.

[0064] ​​2. The use of multiple excitation pulses in the same scan detection enhances the energy of the excitation, improves the signal-to-noise ratio of the echo signal, and enhances the detection capability.

[0065] 3. The detection of the interval of the echo pulses can be achieved by simple or complex methods to different degrees. The peak point can be used for ranging, or the correlation peak value can be obtained by correlation operation with the standard interval echo, or other methods.

[0066] The embodiment of the present application also provides a steel rail high-speed flaw detection device, as described in the following embodiment. Since the principle of solving the problem of the device is similar to the steel rail high-speed flaw detection method, the implementation of the device can be referred to the implementation of the steel rail high-speed flaw detection method, and the repeated parts will not be described again.

[0067] Figure 3 The structural schematic diagram of the steel rail high-speed flaw detection device with time coding in the embodiment of the present application is shown in FIG. 1. Figure 3 As shown in FIG. 1, the device comprises:

[0068] The transmitting coding unit 01 is used to send a steel rail high-speed flaw detection scan instruction to a probe wheel wafer excitation system, wherein the instruction comprises a preset excitation number corresponding to a current scan, a time coding of each excitation pulse, and an excitation time interval of the current scan; the time coding of each excitation pulse is transmitted to an echo analysis unit; wherein the excitation time interval of each scan is different;

[0069] The probe wheel wafer excitation system 02 is used to excite the ultrasonic wafer according to the steel rail high-speed flaw detection scan instruction, scan the steel rail to be detected, and send the echo obtained in the current scan and the time characteristics of the echo to the echo analysis unit;

[0070] The echo analysis unit 03 is used to obtain an abnormal detection result of the steel rail high-speed flaw detection when each of two echo peak values exceeds a preset steel rail damage threshold, and the time interval of the two echo peak values determined according to the time characteristics of the echo is consistent with the excitation time interval of the current scan determined according to the time coding of each excitation pulse.

[0071] In one embodiment, the echo analysis unit is also used to add the abnormal detection result to a B image.

[0072] In one embodiment, the echo analysis unit is also used to determine that the two echoes are ghost waves or interference and discard the two echoes when each of two echo peak values exceeds a preset steel rail damage threshold, and the time interval of the two echo peak values determined according to the time characteristics of the echo is inconsistent with the excitation time interval of the current scan determined according to the time coding of each excitation pulse.

[0073] The embodiment of the present application also provides a computer device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the rail high-speed flaw detection method when executing the computer program.

[0074] The embodiment of the present application also provides a computer readable storage medium, which stores a computer program, and the computer program implements the rail high-speed flaw detection method when executed by a processor.

[0075] The embodiment of the present application also provides a computer program product, which comprises a computer program, and the computer program implements the rail high-speed flaw detection method when executed by a processor.

[0076] Compared with the prior art, in which the increase of the scanning frequency compresses the time interval of scanning, so that the normal echo through a path is just in the detection time gate of the next scanning, which leads to the appearance of the non-existing B echo points, the false alarm, the influence on the accuracy and efficiency of the flaw detection, and the rail high-speed flaw detection scheme provided by the embodiment of the present application has the advantages that a rail high-speed flaw detection scheme with time coding features is provided, the ghost waves and interference can be effectively filtered out, and the real damage echo can be identified, which can reduce the working time of the playback personnel, reduce unnecessary analysis time and on-site review work, improve the flaw detection efficiency, reduce the labor intensity, improve the accuracy and reliability of the flaw detection, and effectively reduce the rail maintenance and repair cost.

[0077] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system or a computer program product. Therefore, the present application can adopt a completely hardware embodiment, a completely software embodiment or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program codes.

[0078] The present application is described with reference to flowcharts and / or block diagrams of the method, device (system) and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing devices to produce a machine, so that the instructions executed by the computer or other programmable data processing devices produce a device for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one flow or multiple flows and / or blocks Figure 1apparatuses that carry out functions specified in one or more blocks or multiple blocks.

[0079] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the flow Figure 1 one or more flows and / or blocks Figure 1 functions specified in one or more blocks or multiple blocks.

[0080] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the flow Figure 1 one or more flows and / or blocks Figure 1 steps of functions specified in one or more blocks or multiple blocks.

[0081] The above specific embodiments are described to further explain the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-speed rail flaw detection method, characterized in that: include: The transmitting encoding unit sends a high-speed rail flaw detection scanning instruction to the wheel probe wafer excitation system. The instruction includes the preset number of excitations corresponding to the current scan, the time code of each excitation pulse, and the excitation time interval of the current scan; the time code of each excitation pulse is transmitted to the echo analysis unit; wherein the excitation time interval is different for each scan; The probe wheel chip excitation system excites the ultrasonic chip according to the rail high-speed flaw detection scanning instruction, scans the rail to be inspected, and sends the echo obtained from the current scan and the time characteristics of the echo to the echo analysis unit; The echo analysis unit obtains an abnormal detection result of high-speed rail flaw detection when every two echo peaks exceed the preset rail damage threshold and the time interval between the two echo peaks determined based on the time characteristics of the echo is consistent with the excitation time interval of the current scan determined based on the time coding of each excitation pulse.

2. The method according to claim 1, wherein Also includes: The echo analysis unit adds the abnormality detection result to the B display image.

3. The method according to claim 1, wherein Also includes: The echo analysis unit determines that the two echoes are phantom waves or interference when each of the two echo peaks exceeds the preset rail damage threshold, and when the time interval between the two echo peaks determined based on the time characteristics of the echo is inconsistent with the excitation time interval of the current scan determined based on the time coding of each excitation pulse, the two echoes are discarded.

4. The method according to claim 1, wherein The echo analysis unit determines the time interval between two echo peaks by using a peak point time measurement method or a correlation peak extraction method of interval echo samples.

5. A high-speed rail flaw detection device, characterized in that: include: The transmitting encoding unit is used to send a high-speed rail flaw detection scanning instruction to the wheel probe wafer excitation system, wherein the instruction includes a preset number of excitations corresponding to the current scan, a time code of each excitation pulse, and an excitation time interval of the current scan; and transmit the time code of each excitation pulse to the echo analysis unit; wherein the excitation time interval of each scan is different; The probe wheel chip excitation system is used to excite the ultrasonic chip according to the rail high-speed flaw detection scanning instruction, scan the rail to be inspected, and send the echo obtained from the current scan and the time characteristics of the echo to the echo analysis unit; The echo analysis unit is used to obtain the abnormal detection result of high-speed rail flaw detection when every two echo peaks exceed the preset rail damage threshold and the time interval between the two echo peaks determined according to the time characteristics of the echo is consistent with the excitation time interval of the current scan determined according to the time coding of each excitation pulse.

6. The device according to claim 5, characterized in that The echo analysis unit is further configured to add abnormality detection results to the B-display.

7. The device according to claim 5, characterized in that The echo analysis unit is also used to determine that the two echoes are phantom waves or interference when each of the two echo peaks exceeds a preset rail damage threshold and the time interval between the two echo peaks determined according to the time characteristics of the echo is inconsistent with the excitation time interval of the current scan determined according to the time coding of each excitation pulse, and the two echoes are discarded.

8. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method according to any one of claims 1 to 4 is implemented.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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