A calibration method, calibration device and test equipment for track bed dirt detection data

Abstract

This paper provides a calibration method, calibration device and test equipment for roadbed contamination detection data, wherein the method comprises: obtaining the test value of a reference antenna and the test value of a selected antenna under the same environment; obtaining a scaling factor according to the test value of the reference antenna and the test value of the selected antenna; and calibrating the detection data of the selected antenna by the scaling factor. This paper can calibrate the roadbed contamination detection data, thereby improving the consistency and accuracy of roadbed contamination detection.

Description

Technical Field

[0001] The present invention relates to the field of track ballast bed status, and in particular to a calibration method, a calibration device and a test equipment for ballast bed dirtiness detection data. Background Art

[0002] Most of the radar detection technologies for ballasted track bed status adopt non-contact methods, which use geological radar to emit high-frequency electromagnetic waves to the inspected roadbed, and analyze the ballast thickness, roadbed contamination and water content based on the echo energy and spectrum information. The roadbed contamination is mainly identified based on the echo energy, and the peak-to-valley difference of the echo signal and the signal time domain scanning area are two indicators that can reflect the echo energy.

[0003] In order to determine the contamination of the roadbed, it is necessary to detect the echo signal and determine the peak-to-valley difference of the echo signal and the signal time domain scanning area. In the prior art, roadbed contamination detection is mostly performed by radar antennas, but the existing antennas have detection errors during detection, resulting in different echo signals when different antennas detect the same roadbed, which reduces the accuracy of detection.

[0004] Therefore, there is an urgent need for a calibration method for roadbed contamination detection data to calibrate the roadbed contamination detection data, thereby improving the consistency and accuracy of roadbed contamination detection. Summary of the invention

[0005] The purpose of the embodiments of this document is to provide a calibration method, a calibration device and a test equipment for calibrating the ballast bed contamination detection data, so as to calibrate the ballast bed contamination detection data and thereby improve the consistency and accuracy of the ballast bed contamination detection.

[0006] To achieve the above objectives, on the one hand, an embodiment of the present invention provides a method for calibrating roadbed contamination detection data, including:

[0007] Obtain the test values ​​of the reference antenna and the selected antenna under the same environment;

[0008] Obtaining a scaling factor according to a test value of the reference antenna and a test value of the selected antenna;

[0009] The detection data of the selected antenna is calibrated by the scaling factor.

[0010] Preferably, the test value of the reference antenna is: the peak-to-valley difference of the echo signal or the time-domain scanning area of ​​the echo signal obtained after the reference antenna transmits the radar signal;

[0011] The test value of the selected antenna is: the peak-to-valley difference of the echo signal or the time-domain scanning area of ​​the echo signal obtained after the selected antenna transmits the radar signal.

[0012] Preferably, the obtaining of the test value of the reference antenna and the test value of the selected antenna under the same environment further comprises:

[0013] Under the same environment, the reference antenna and the selected antenna are respectively tested by a first test device to obtain a peak-to-valley difference value of an echo signal of the reference antenna and a peak-to-valley difference value of an echo signal of the selected antenna;

[0014] Alternatively, the reference antenna and the selected antenna are tested respectively by a second test device under the same environment to obtain the time domain scanning area of ​​the echo signal of the reference antenna and the time domain scanning area of ​​the echo signal of the selected antenna.

[0015] Preferably, obtaining the scaling factor according to the test value of the reference antenna and the test value of the selected antenna further comprises:

[0016] Obtaining a first scaling factor according to a correlation between a peak-to-valley difference value of an echo signal of the reference antenna and a peak-to-valley difference value of an echo signal of the selected antenna;

[0017] Or, the second scaling factor is obtained according to the correlation between the time-domain scanning area of ​​the echo signal of the reference antenna and the time-domain scanning area of ​​the echo signal of the selected antenna.

[0018] Preferably, the first scaling factor is calculated by the following formula:

[0019]

[0020] in, is the first scaling factor, V R0 is the peak-to-valley difference of the echo signal of the reference antenna, V R It is the peak-to-valley difference of the echo signal of the selected antenna.

[0021] Preferably, the second scaling factor is calculated by the following formula:

[0022] μ = StAb0 / StAb;

[0023] Wherein, μ is the second scaling factor, StAb0 is the time domain scanning area of ​​the echo signal of the reference antenna, and StAb is the time domain scanning area of ​​the echo signal of the selected antenna.

[0024] Preferably, the calibrating the detection data of the selected antenna by the scaling factor further comprises:

[0025] The scaling factor is multiplied by the detection data of the selected antenna to obtain calibrated detection data.

[0026] On the other hand, an embodiment of the present invention provides a device for calibrating roadbed contamination detection data, the device comprising:

[0027] An acquisition module, used to acquire the test value of the reference antenna and the test value of the selected antenna under the same environment;

[0028] A determination module, configured to obtain a scaling factor according to a test value of the reference antenna and a test value of the selected antenna;

[0029] A calibration module is used to calibrate the detection data of the selected antenna through the scaling factor.

[0030] In yet another aspect, the embodiments of the present invention further provide a test device for detecting roadbed contamination data, wherein the test device is a first test device;

[0031] The first test equipment includes two first brackets, a metal plate, a first connecting rod, a first antenna and a first main control unit.

[0032] The metal plate is placed between the two first brackets, two ends of the first connecting rod are respectively connected to the two first brackets, the first antenna is arranged on the first connecting rod, and a first set distance is maintained between the first antenna and the metal plate;

[0033] The first antenna is used to receive the instruction of the first main control unit to transmit the radar signal, and after receiving the echo signal, send the echo signal to the first main control unit;

[0034] The first main control unit is used to process the echo signal according to any of the above methods to obtain a first scaling factor.

[0035] In yet another aspect, the embodiments of the present invention further provide a test device for detecting track bed dirtiness data, wherein the test device is a second test device;

[0036] The second test equipment includes two second brackets, a standard ballast model box, a second connecting rod, a second antenna and a second main control unit.

[0037] The standard ballast model box is placed between the two second brackets, the two ends of the second connecting rod are respectively connected to the two second brackets, the second antenna is arranged on the second connecting rod, and a second set distance is maintained between the second antenna and the standard ballast model box;

[0038] The second antenna is used to receive the instruction of the second main control unit to transmit the radar signal, and receive the echo signal and send it to the second main control unit;

[0039] The second main control unit is used to process the echo signal according to any of the above methods to obtain a second scaling factor.

[0040] On the other hand, the embodiments of the present invention further provide a computer device, including a memory, a processor, and a computer program stored in the memory, wherein when the computer program is executed by the processor, the instructions of any one of the above methods are executed.

[0041] On the other hand, the embodiments of the present invention further provide a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor of a computer device, the computer program executes instructions of any one of the above-described methods.

[0042] It can be seen from the technical solution provided in the above embodiments of the present invention that the embodiments of the present invention obtain the scaling factor through the test value of the reference antenna and the test value of the selected antenna under the same environment, and calibrate the detection data through the scaling factor. The detection data of the same track bed can be calibrated according to a unified standard, thereby ensuring the consistency and accuracy of the detection results of the same track bed.

[0043] In order to make the above and other purposes, features and advantages of this article more obvious and easy to understand, the following specifically cites preferred embodiments and describes them in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of this article or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of this article. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A schematic flow chart of a method for calibrating roadbed contamination detection data provided in an embodiment of this invention is shown;

[0046] Figure 2 A schematic diagram showing the peak-to-valley difference of an echo signal provided in an embodiment of this invention is shown;

[0047] Figure 3 A schematic diagram showing a time domain scanning area of ​​an echo signal provided in an embodiment of this invention is shown;

[0048] Figure 4 The overall structure schematic diagram of the first test device provided in the embodiment of this article is shown;

[0049] Figure 5 The overall structure schematic diagram of the second test device provided in the embodiment of this article is shown;

[0050] Figure 6 A schematic diagram of a process for processing a signal provided in an embodiment of the present invention is shown;

[0051] Figure 7 A schematic diagram of the module structure of a device for calibrating roadbed contamination detection data provided in an embodiment of the present invention is shown;

[0052] Figure 8 A schematic diagram of the structure of a computer device provided in an embodiment of this invention is shown.

[0053] Description of the accompanying symbols:

[0054] 1. The first bracket;

[0055] 2. Metal plate;

[0056] 3. First connecting rod;

[0057] 4. The first antenna;

[0058] 5. A first connecting member;

[0059] 6. The second bracket;

[0060] 7. Standard ballast model box;

[0061] 8. Second connecting rod;

[0062] 9. Second antenna;

[0063] 10. A second connecting member;

[0064] 100. Get module;

[0065] 200. Determine the module;

[0066] 300, calibration module;

[0067] 802. Computer equipment;

[0068] 804, processor;

[0069] 806. Memory;

[0070] 808, driving mechanism;

[0071] 810, input / output module;

[0072] 812. Input device;

[0073] 814. Output device;

[0074] 816. Presentation equipment;

[0075] 818. Graphical user interface;

[0076] 820, network interface;

[0077] 822, communication link;

[0078] 824. Communication bus. DETAILED DESCRIPTION

[0079] The following will be combined with the drawings in the embodiments of this article to clearly and completely describe the technical solutions in the embodiments of this article. Obviously, the described embodiments are only part of the embodiments of this article, not all of the embodiments. Based on the embodiments of this article, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this article.

[0080] In order to determine the contamination of the roadbed, it is necessary to detect the echo signal and determine the peak-to-valley difference of the echo signal and the signal time domain scanning area. In the prior art, roadbed contamination detection is mostly performed by radar antennas, but the existing antennas have detection errors during detection, resulting in different echo signals when different antennas detect the same roadbed, which reduces the accuracy of detection.

[0081] In order to solve the above problems, an embodiment of the present invention provides a method for calibrating track bed contamination detection data. Figure 1 This is a schematic diagram of the steps of a calibration method for track bed dirt detection data provided in the embodiments of this article. This specification provides the method operation steps described in the embodiments or flowcharts, but may include more or fewer operation steps based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the steps among many orders, and does not represent the only order of execution. When the actual system or device product is executed, it can be executed in the order of the methods shown in the embodiments or drawings or in parallel.

[0082] Reference Figure 1 , a calibration method for roadbed contamination detection data, comprising:

[0083] S101: Obtaining a test value of a reference antenna and a test value of a selected antenna under the same environment;

[0084] S102: Obtaining a scaling factor according to a test value of the reference antenna and a test value of the selected antenna;

[0085] S103: Calibrate the detection data of the selected antenna using the scaling factor.

[0086] The most common detection method is to detect the contamination of the roadbed using a radar test system. Generally, a radar antenna is used to transmit a radar signal, i.e., an electromagnetic wave, and the electromagnetic wave echo signal reflected by the roadbed is collected for further analysis and calculation to obtain the contamination status of the roadbed.

[0087] The reference antenna refers to an antenna whose performance and indicators meet the standards. Specifically, the reference antenna can be screened according to the screening criteria of Highway Section Flaw Detection and Structural Layer Thickness Ground Penetrating Radar JJG (Transportation) 124-2015.

[0088] The selected antenna is the one that needs to be calibrated. Due to its own performance, there will inevitably be detection errors when using the selected antenna to detect roadbed contamination. For the same roadbed, it may be necessary to detect contamination more than once, but there is no guarantee that the same reference antenna will be used for each detection. If the same reference antenna is used every time, there is no guarantee that the reference antenna will not produce errors every time it is used, and the detection results will not be affected by the errors.

[0089] On this basis, the calibration method described in this article was developed. After obtaining the roadbed contamination detection data of the selected antenna, the scaling factor is obtained through the test value of the reference antenna and the test value of the selected antenna under the same environment. The detection data is calibrated by the scaling factor, and the detection data of the same roadbed can be calibrated according to a unified standard, ensuring the accuracy of the detection results of the same roadbed. With the calibration method in this article, when the same roadbed is tested multiple times, there is no need to spend time to ensure that the antenna used for each test is the same. Therefore, in addition to improving the accuracy of roadbed contamination detection, the calibration method described in this article can also improve the efficiency of roadbed detection.

[0090] In the embodiment of this article, the test value of the reference antenna is: the peak-to-valley difference of the echo signal or the time-domain scanning area of ​​the echo signal obtained after the reference antenna transmits the radar signal;

[0091] The test value of the selected antenna is: the peak-to-valley difference of the echo signal or the time-domain scanning area of ​​the echo signal obtained after the selected antenna transmits the radar signal.

[0092] This article describes two calibration methods. For the first method, the test value can be the peak-to-valley difference of the echo signal. The peak-to-valley difference of the echo signal of the reference antenna and the peak-to-valley difference of the echo signal of the selected antenna are used to obtain the scaling factor to calibrate the detection data of the selected antenna. For the second method, the test value can be the time domain scanning area of ​​the echo signal. The time domain scanning area of ​​the echo signal of the reference antenna and the time domain scanning area of ​​the echo signal of the selected antenna are used to obtain the scaling factor to calibrate the detection data of the selected antenna.

[0093] Specifically, for a radar antenna, no matter it is a reference antenna or a selected antenna, it includes a transmitting end and a receiving end, the transmitting end is used to transmit a radar signal, and the receiving end is used to receive an echo signal.

[0094] Reference Figure 2 , Figure 2is the echo signal received by the receiving end, and the dotted line shows the peak value of the echo signal. After receiving the echo signal, the peak-to-valley difference of the echo signal can be further obtained, and the peak-to-valley difference is the difference between the peak and the trough. The peak here can be the peak of the entire echo signal, and the trough can be the trough of the entire echo signal, or the trough adjacent to the preceding peak, or the trough adjacent to the succeeding peak, or the trough with the largest difference from the peak in the preceding trough of the peak, or the trough with the largest difference from the peak in the succeeding trough of the peak. Which of the above troughs to be used can be set according to actual conditions.

[0095] Reference Figure 3 , Figure 3 is the echo signal received by the receiving end, Figure 3 The sum of the areas in the middle shaded area is the time domain scanning area of ​​the echo signal, where the method for determining the time domain scanning area of ​​the echo signal is: using time as the horizontal coordinate and the signal amplitude as the vertical coordinate, constructing a coordinate system, plotting the echo signal in the coordinate system, and the sum of the areas enclosed by the echo signal and the horizontal coordinate is the time domain scanning area of ​​the echo signal. It should be noted that because the area enclosed by the echo signal and the horizontal coordinate is calculated, whether the amplitude of the echo signal is positive or negative does not affect the calculation of the area.

[0096] Specifically, there are many methods to obtain the area enclosed by the echo signal and the horizontal coordinate. The idea of ​​definite integral can be used to "subdivide" the time of the horizontal coordinate into multiple time periods, calculate the average value of the echo signal corresponding to each time period, and multiply the absolute value of the average value by the time period to obtain the area of ​​the time period. By this method, the areas of multiple time periods are obtained, and then summed up to obtain the area enclosed by the echo signal and the horizontal coordinate. In addition, the area can also be calculated by other mathematical methods such as calculus, and this article does not limit the specific method.

[0097] Furthermore, obtaining the test value of the reference antenna and the test value of the selected antenna under the same environment further includes:

[0098] Under the same environment, the reference antenna and the selected antenna are respectively tested by a first test device to obtain a peak-to-valley difference value of an echo signal of the reference antenna and a peak-to-valley difference value of an echo signal of the selected antenna;

[0099] Alternatively, the reference antenna and the selected antenna are tested respectively by a second test device under the same environment to obtain the time domain scanning area of ​​the echo signal of the reference antenna and the time domain scanning area of ​​the echo signal of the selected antenna.

[0100] Reference Figure 4The first test equipment includes two first brackets 1, a metal plate 2, a first connecting rod 3, a first antenna 4, a first connecting member 5, a first distance encoder (not shown in the figure) and a first main control unit (not shown in the figure).

[0101] The metal plate 2 is placed between the two first brackets 1 and laid flat on the hard and flat ground. The two ends of the first connecting rod 3 are respectively connected to the two first brackets 1. The first antenna 4 is set on the first connecting rod 3 through the first connecting member 5, so that the center of the first antenna 4 and the center of the metal plate 2 are kept horizontally without deviation, and a first set distance is maintained between the first antenna 4 and the metal plate 2; wherein the first connecting member 5 can be a connecting rod, a connecting block or other structures with a connecting function. The first set distance is set according to the actual working conditions. In this article, the first set distance can be 300mm.

[0102] The first antenna 4 is used to receive the instruction of the first main control unit to transmit the radar signal, and after receiving the echo signal, send the echo signal to the first main control unit.

[0103] The first antenna 4 is a reference antenna or a selected antenna. The environment for testing the reference antenna or the selected antenna is the same, including the same connection method of the cable between the first antenna 4 and the first main control unit. The cable is kept flat and must not be knotted or coiled.

[0104] When conducting the test, the following settings need to be set: sampling point 512, time window 15ns, channel spacing 5cm, pulse frequency 800k, distance trigger, no gain, and the test system is preheated for 5min. Turn the first distance encoder to continuously receive multiple echo signals.

[0105] Specifically, after the transmitting end of the first antenna 4 transmits a radar signal, the receiving end receives the echo signal within 15ns reflected by the metal plate 2, divides the echo signal, and obtains the echo signal values ​​corresponding to the 512 sampling points. Then the first distance encoder can be rotated 5cm. It should be noted that in the embodiment of this article, the first distance encoder is rotated but the actual first antenna 4 does not move and remains in the initial position. Then the radar signal is transmitted again, and the above steps are repeated multiple times to obtain multiple echo signals.

[0106] Reference Figure 6 After receiving the multi-channel echo signal, the signal needs to be processed:

[0107] S201: performing band-pass filtering on the multi-channel echo signals, wherein the low-pass filter is 4000 MHz and the high-pass filter is 100 MHz;

[0108] S202: performing average calculation on the multi-channel echo signals after bandpass filtering to obtain a representative echo signal.

[0109] The method of averaging calculation in the above step S202 is: calculating the average value of the multi-channel echo signals corresponding to each sampling point in the time domain to obtain a representative echo signal value corresponding to the sampling point, and combining multiple echo signal points in the entire time domain to obtain a representative echo signal.

[0110] Specifically, because each echo signal is composed of 512 sampling points, multiple echo signals (N echo signals) can form a matrix of 512 rows and N columns. During the averaging calculation, the N data in each row can be averaged to form a representative echo signal value of the row. The representative echo signal is 1 column and 512 rows of data.

[0111] Of course, in step S202, the median or mode of the filtered multi-channel echo signals may also be calculated. Any method that can obtain representative echo signals may be applicable, and this document does not limit the specific method.

[0112] After obtaining a representative echo signal, the peak-to-valley difference of the echo signal may be further obtained, that is, the peak-to-valley difference of the echo signal of the reference antenna / selected antenna.

[0113] Reference Figure 5 The second test equipment includes two second brackets 6, a standard ballast model box 7, a second connecting rod 8, a second antenna 9, a second connecting member 10, a second distance encoder (not shown in the figure) and a second main control unit (not shown in the figure).

[0114] The standard ballast model box 7 is placed between the two second brackets 6. The length and width of the standard ballast model box 7 are not less than twice the corresponding size of the second antenna 9. The ballast thickness is not less than 100 cm. The box body shall not be made of metal material. The ballast model box should be kept in a dry and vibration-free environment for a long time. The two ends of the second connecting rod 8 are respectively connected to the two second brackets 6. The second antenna 9 is set on the second connecting rod 8 through the second connecting member 10 to keep the center of the second antenna 9 and the center of the metal plate 2 horizontally without deviation. The second antenna 9 and the standard ballast model box 7 are maintained at a second set distance; wherein the second connecting member 10 can be a connecting rod, a connecting block or other structures with a connecting function. The second set distance is set according to the actual working conditions. In this article, the second set distance can be 300 mm.

[0115] The second antenna 9 is used to receive the instruction of the second main control unit to transmit the radar signal, and receive the echo signal and send it to the second main control unit.

[0116] The second antenna 9 is a reference antenna or a selected antenna. The environment for testing the reference antenna or the selected antenna is the same, including the same connection method of the cable between the second antenna 9 and the second main control unit. The cable is kept flat and must not be knotted or coiled.

[0117] When conducting the test, the following settings need to be set: sampling point 512, time window 15ns, channel spacing 5cm, pulse frequency 800k, distance trigger, no gain, and the test system is preheated for 5min. Turn the second distance encoder to continuously receive multiple echo signals.

[0118] After receiving the multi-channel echo signals, the signals also need to be processed. The processing method is shown in the above steps S201 and S202.

[0119] After obtaining a representative echo signal, the time domain scanning area of ​​the echo signal may be further obtained, that is, the time domain scanning area of ​​the echo signal of the reference antenna / selected antenna.

[0120] In the embodiment of this article, obtaining the scaling factor according to the test value of the reference antenna and the test value of the selected antenna further includes:

[0121] Obtaining a first scaling factor according to a correlation between a peak-to-valley difference value of an echo signal of the reference antenna and a peak-to-valley difference value of an echo signal of the selected antenna;

[0122] Or, the second scaling factor is obtained according to the correlation between the time-domain scanning area of ​​the echo signal of the reference antenna and the time-domain scanning area of ​​the echo signal of the selected antenna.

[0123] The correlation is mainly manifested as: taking the peak-to-valley difference of the echo signal of the reference antenna / time domain scanning area as the standard, measuring the peak-to-valley difference of the echo signal of the selected antenna / time domain scanning area. For example, taking the number 10 as the standard, the number 5 is half of 10, and the number 2 is 1 / 5 of 10. "Half" indicates the correlation between 5 and 10, and "1 / 5" indicates the correlation between 2 and 10.

[0124] From the above, it can be seen that the best way to reflect the correlation is division. The first scaling factor can be obtained by dividing the peak-to-valley difference of the echo signal of the selected antenna by the peak-to-valley difference of the echo signal of the reference antenna. Similarly, the second scaling factor can be obtained by dividing the time domain scanning area of ​​the echo signal of the selected antenna by the time domain scanning area of ​​the echo signal of the reference antenna.

[0125] Of course, it is conceivable that if the scaling factor is determined by division, it is necessary to ensure that the reference antenna and the selected antenna have the same environmental conditions when obtaining the echo signal peak-to-valley difference / time domain scanning area, and are not interfered by other external factors.

[0126] Specifically, the first scaling factor is calculated by the following formula:

[0127]

[0128] in, is the first scaling factor, V R0 is the peak-to-valley difference of the echo signal of the reference antenna, V R It is the peak-to-valley difference of the echo signal of the selected antenna.

[0129] The second scaling factor is calculated by the following formula:

[0130] μ = StAb0 / StAb;

[0131] Wherein, μ is the second scaling factor, StAb0 is the time domain scanning area of ​​the echo signal of the reference antenna, and StAb is the time domain scanning area of ​​the echo signal of the selected antenna.

[0132] Of course, assuming that the reference antenna and the selected antenna are interfered by external factors when acquiring the peak-to-valley difference value / time-domain scanning area of ​​the echo signal, the scaling factor can also be obtained by simply quantifying the interference of the external factors.

[0133] Specifically, assuming that when the reference antenna and the selected antenna obtain the peak-to-valley difference of the echo signal through the first test equipment, the distances between the reference antenna and the selected antenna and the metal plate 2 are not the same as the first set distance, the distance between the reference antenna and the metal plate 2 is A, and the distance between the selected antenna and the metal plate 2 is B. At this time, it is only necessary to determine the effect of the distance on the peak-to-valley difference of the echo signal. The distance between the antenna and the metal plate 2 can be used as the horizontal coordinate, and the peak-to-valley difference of the echo signal can be used as the vertical coordinate to obtain a curve showing that the peak-to-valley difference of the echo signal changes with the distance between the antenna and the metal plate 2. Then determine the difference between the distances A and B, and roughly calculate the value corresponding to the selected antenna when the distance is A based on the difference, and further determine the first scaling factor through the above-mentioned division.

[0134] In an embodiment of this invention, calibrating the detection data of the selected antenna by the scaling factor further comprises:

[0135] The scaling factor is multiplied by the detection data of the selected antenna to obtain calibrated detection data.

[0136] Specifically, the detection data of the selected antenna is multiplied by the sum of the first scaling factor or the second scaling factor to obtain the calibrated detection data.

[0137] Reference Figure 4 Based on the calibration method for the ballast bed contamination detection data described above, the embodiment of this invention further provides a test device for the ballast bed contamination detection data, wherein the test device is a first test device;

[0138] The first test equipment includes two first brackets 1, a metal plate 2, a first connecting rod 3, a first antenna 4 and a first main control unit (not shown in the figure).

[0139] The metal plate 2 is placed between the two first brackets 1, the two ends of the first connecting rod 3 are respectively connected to the two first brackets 1, the first antenna 4 is arranged on the first connecting rod 3, and a first set distance is maintained between the first antenna 4 and the metal plate 2;

[0140] The first connecting rod 3 can be directly connected to the first antenna 4, and the first connecting rod 3 can also be connected to a first connecting member 5, wherein the first connecting member 5 can be a connecting rod, a connecting block or other structures having a connecting function, and is used to connect the first connecting rod 3 to the first antenna 4;

[0141] The first antenna 4 is used to receive the instruction of the first main control unit to transmit the radar signal, and after receiving the echo signal, send the echo signal to the first main control unit;

[0142] The first main control unit is used to process the echo signal according to any of the above methods to obtain a first scaling factor.

[0143] Reference Figure 5 , based on the above-mentioned calibration method for roadbed contamination detection data, the embodiment of this article further provides a test device for roadbed contamination detection data, and the test device is a second test device;

[0144] The second test equipment includes two second brackets 6, a standard ballast model box 7, a second connecting rod 8, a second antenna 9 and a second main control unit (not shown in the figure).

[0145] The standard ballast model box 7 is placed between the two second brackets 6, the two ends of the second connecting rod 8 are respectively connected to the two second brackets 6, the second antenna 9 is arranged on the second connecting rod 8, and the second antenna 9 maintains a second set distance from the standard ballast model box 7;

[0146] The second connecting rod 8 can be directly connected to the second antenna 9, and the second connecting rod 8 can also be connected to a second connecting member 10, wherein the second connecting member 10 can be a connecting rod, a connecting block or other structures having a connecting function, and is used to connect the second connecting rod 8 to the second antenna 9;

[0147] The second antenna 9 is used to receive the instruction of the second main control unit to transmit the radar signal, and receive the echo signal and send it to the second main control unit;

[0148] The second main control unit is used to process the echo signal according to any of the above methods to obtain a second scaling factor.

[0149] Based on the calibration method of the track bed dirt detection data described above, the embodiments of this article also provide a calibration device for the track bed dirt detection data. The device may include a system (including a distributed system), software (application), module, component, server, client, etc. using the method described in the embodiments of this article and a device combined with necessary implementation hardware. Based on the same innovative concept, the device in one or more embodiments provided in the embodiments of this article is as described in the following embodiments. Since the implementation scheme and method of the device to solve the problem are similar, the implementation of the specific device in the embodiments of this article can refer to the implementation of the aforementioned method, and the repetitions will not be repeated. As used below, the term "unit" or "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0150] Specifically, Figure 7 This is a schematic diagram of the module structure of an embodiment of a calibration device for track bed dirt detection data provided in an embodiment of this invention, referring to Figure 7 As shown, a device for calibrating roadbed contamination detection data provided in an embodiment of the present invention includes: an acquisition module 100, a determination module 200, and a calibration module 300.

[0151] An acquisition module 100 is used to acquire a test value of a reference antenna and a test value of a selected antenna under the same environment;

[0152] A determination module 200, configured to obtain a scaling factor according to a test value of the reference antenna and a test value of the selected antenna;

[0153] The calibration module 300 is used to calibrate the detection data of the selected antenna by using the scaling factor.

[0154] Reference Figure 8As shown, based on the calibration method of the track bed dirt detection data described above, a computer device 802 is also provided in one embodiment of the present invention, wherein the method is run on the computer device 802. The computer device 802 may include one or more processors 804, such as one or more central processing units (CPUs) or graphics processing units (GPUs), and each processing unit may implement one or more hardware threads. The computer device 802 may also include any memory 806, which is used to store any kind of information such as code, settings, data, etc. In a specific embodiment, the computer program on the memory 806 and which can be run on the processor 804, when the computer program is run by the processor 804, can execute instructions according to the above method. Non-limitingly, for example, the memory 806 may include any one or more combinations of the following: any type of RAM, any type of ROM, flash memory device, hard disk, optical disk, etc. More generally, any memory may use any technology to store information. Further, any memory may provide volatile or non-volatile retention of information. Further, any memory may represent a fixed or removable component of the computer device 802. In one embodiment, when the processor 804 executes the associated instructions stored in any memory or combination of memories, the computer device 802 can perform any operation of the associated instructions. The computer device 802 also includes one or more drive mechanisms 808 for interacting with any memory, such as a hard disk drive mechanism, an optical disk drive mechanism, etc.

[0155] The computer device 802 may also include an input / output module 810 (I / O) for receiving various inputs (via input devices 812) and for providing various outputs (via output devices 814). A specific output mechanism may include a presentation device 816 and an associated graphical user interface 818 (GUI). In other embodiments, the input / output module 810 (I / O), input device 812, and output device 814 may not be included, and the computer device 802 may be used as a computer device in a network. The computer device 802 may also include one or more network interfaces 820 for exchanging data with other devices via one or more communication links 822. One or more communication buses 824 couple the components described above together.

[0156] The communication link 822 may be implemented in any manner, for example, through a local area network, a wide area network (e.g., the Internet), a point-to-point connection, etc., or any combination thereof. The communication link 822 may include any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc. governed by any protocol or combination of protocols.

[0157] Corresponds to Figure 1The method in this article also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are executed.

[0158] The embodiment of the present invention also provides a computer readable instruction, wherein when the processor executes the instruction, the program therein causes the processor to execute the following Figure 1 The method shown.

[0159] It should be understood that in the various embodiments of this document, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this document.

[0160] It should also be understood that in the embodiments of this article, the term "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0161] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this article.

[0162] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0163] In the several embodiments provided herein, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or can be electrical, mechanical or other forms of connection.

[0164] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of this article.

[0165] In addition, each functional unit in each embodiment of this invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional unit.

[0166] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this article is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of this article. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0167] Specific embodiments are used in this article to illustrate the principles and implementation methods of this article. The description of the above embodiments is only used to help understand the methods and core ideas of this article. At the same time, for general technicians in this field, according to the ideas of this article, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on this article.

Claims

1. A method for calibrating roadbed contamination detection data, characterized in that: include: Obtaining a test value of a reference antenna and a test value of a selected antenna under the same environment, wherein the test value of the reference antenna is: a peak-to-valley difference of an echo signal or a time-domain scanning area of ​​an echo signal obtained after the reference antenna transmits a radar signal, and the test value of the selected antenna is: a peak-to-valley difference of an echo signal or a time-domain scanning area of ​​an echo signal obtained after the selected antenna transmits a radar signal; Obtaining a scaling factor according to a test value of the reference antenna and a test value of the selected antenna; The obtaining of the scaling factor according to the test value of the reference antenna and the test value of the selected antenna further comprises: Obtaining a first scaling factor according to a correlation between a peak-to-valley difference value of an echo signal of the reference antenna and a peak-to-valley difference value of an echo signal of the selected antenna; or, obtaining a second scaling factor according to a correlation between a time-domain scanning area of ​​an echo signal of the reference antenna and a time-domain scanning area of ​​an echo signal of the selected antenna; The first scaling factor is calculated by the following formula: in, is the first scaling factor, V R0 is the peak-to-valley difference of the echo signal of the reference antenna, V R is the peak-to-valley difference of the echo signal of the selected antenna; The second scaling factor is calculated by the following formula: μ = StAb0 / StAb; Wherein, μ is the second scaling factor, StAb0 is the time domain scanning area of ​​the echo signal of the reference antenna, and StAb is the time domain scanning area of ​​the echo signal of the selected antenna; The scaling factor is multiplied by the detection data of the selected antenna to obtain calibrated detection data.

2. The calibration method for roadbed contamination detection data according to claim 1, characterized in that: The obtaining of the test value of the reference antenna and the test value of the selected antenna under the same environment further comprises: Under the same environment, the reference antenna and the selected antenna are respectively tested by a first test device to obtain a peak-to-valley difference value of an echo signal of the reference antenna and a peak-to-valley difference value of an echo signal of the selected antenna; Alternatively, the reference antenna and the selected antenna are tested respectively by a second test device under the same environment to obtain the time domain scanning area of ​​the echo signal of the reference antenna and the time domain scanning area of ​​the echo signal of the selected antenna.

3. A calibration device for roadbed contamination detection data, characterized in that: The device comprises: An acquisition module is used to acquire a test value of a reference antenna and a test value of a selected antenna under the same environment, wherein the test value of the reference antenna is: a peak-to-valley difference of an echo signal or a time-domain scanning area of ​​an echo signal obtained after the reference antenna transmits a radar signal, and the test value of the selected antenna is: a peak-to-valley difference of an echo signal or a time-domain scanning area of ​​an echo signal obtained after the selected antenna transmits a radar signal; A determination module, configured to obtain a scaling factor according to a test value of the reference antenna and a test value of the selected antenna; The obtaining of the scaling factor according to the test value of the reference antenna and the test value of the selected antenna further comprises: Obtaining a first scaling factor according to a correlation between a peak-to-valley difference value of an echo signal of the reference antenna and a peak-to-valley difference value of an echo signal of the selected antenna; or, obtaining a second scaling factor according to a correlation between a time-domain scanning area of ​​an echo signal of the reference antenna and a time-domain scanning area of ​​an echo signal of the selected antenna; The first scaling factor is calculated by the following formula: in, is the first scaling factor, V R0 is the peak-to-valley difference of the echo signal of the reference antenna, V R is the peak-to-valley difference of the echo signal of the selected antenna; The second scaling factor is calculated by the following formula: μ = StAb0 / StAb; Wherein, μ is the second scaling factor, StAb0 is the time domain scanning area of ​​the echo signal of the reference antenna, and StAb is the time domain scanning area of ​​the echo signal of the selected antenna; The calibration module is used to multiply the scaling factor by the detection data of the selected antenna to obtain calibrated detection data.

4. A test device for detecting roadbed contamination data, characterized in that: The test equipment is a first test equipment; The first test equipment includes two first brackets, a metal plate, a first connecting rod, a first antenna and a first main control unit. The metal plate is placed between the two first brackets, two ends of the first connecting rod are respectively connected to the two first brackets, the first antenna is arranged on the first connecting rod, and a first set distance is maintained between the first antenna and the metal plate; The first antenna is used to receive the instruction of the first main control unit to transmit the radar signal, and after receiving the echo signal, send the echo signal to the first main control unit; The first main control unit is used to process the echo signal according to the method of claim 1 to obtain a first scaling factor.

5. A test device for detecting roadbed contamination data, characterized in that: The test equipment is a second test equipment; The second test equipment includes two second brackets, a standard ballast model box, a second connecting rod, a second antenna and a second main control unit. The standard ballast model box is placed between the two second brackets, the two ends of the second connecting rod are respectively connected to the two second brackets, the second antenna is arranged on the second connecting rod, and a second set distance is maintained between the second antenna and the standard ballast model box; The second antenna is used to receive the instruction of the second main control unit to transmit the radar signal, and receive the echo signal and send it to the second main control unit; The second main control unit is used to process the echo signal according to the method of claim 1 to obtain a second scaling factor.

6. A computer device comprising a memory, a processor, and a computer program stored in the memory, characterized in that: When the computer program is executed by the processor, the computer program executes the instructions of the method according to any one of claims 1-2.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor of a computer device, the computer program executes the instructions of the method according to any one of claims 1-2.

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