Failure processing method and device for track signal onboard relay

Abstract

The present invention provides a method and device for handling failure of a track signal onboard relay, the method comprising: determining whether each relay is faulty according to the power-on waveforms at both ends of the coil of each relay in the onboard relay combination of the vehicle-mounted ATP device; determining the probability density function of the pull-in time according to the pull-in time of each normally open contact of the faulty relay; using the probability density function to determine the capacitance that makes the pull-in probability of the onboard relay combination greater than a first preset threshold, and using the capacitance as the capacitance connected in parallel with the power supply in the onboard relay combination. On the one hand, the present invention only needs to increase the capacitance, which effectively utilizes resources and has low maintenance costs; on the other hand, by determining the appropriate capacitance, the stability and reliability of the output of the onboard relay combination are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment maintenance, and in particular to a method and device for handling failure of a track signal onboard relay. Background Art

[0002] With the development of urban rail transit, the signal system, as a key system for rail transit operation control, plays an important role in train overspeed protection, assisted driving and safe operation. The on-board ATP (Automatic Train Protection) equipment in the signal system is responsible for the supervision and direct control of the train, realizing the overspeed protection of the train, automatic train driving and completing human-computer interaction. The on-board relay is a key component used for input and output of the on-board ATP equipment, and its working stability is crucial.

[0003] The on-board ATP device realizes the output logic channel through the on-board relay combination and issues relevant control instructions for controlling the vehicle. The on-board relay combination logic of the output channel of the on-board ATP device is as follows Figure 1 As shown. The working principle is: when the relay control signal is applied (input 24V enable), the input signal passes through the normally closed contacts of relays 4, 3 and 2, and then the relay 1 is attracted. At this time, the normally open contact of relay 1 is closed to attract relay 2, and the normally closed contact of relay 2 is disconnected, and the normally open contact is closed at the same time, and the 24V enable of relay 2 is self-maintained. Similarly, the normally open contact of relay 1 is closed and drives relays 3 and 4 to attract and self-maintain. At this time, the controlled safety output signal is output in series through the normally closed contact of relay 1 and the normally open contacts of relays 2, 3 and 4. If any one of the four relays has an output failure, there will be no safety output signal.

[0004] The track signal onboard relay combination is interlocked by the normally open contact and normally closed contact combination of the relay to ensure the redundant reliability of the output signal. In the prior art, when the entire relay combination is determined to be faulty through the invalid output of the relay combination, the entire relay combination is replaced, which wastes resources and has high maintenance costs. Summary of the invention

[0005] The present invention provides a method and device for handling failure of a track signal onboard relay, which are used to solve the defects of replacing a failed onboard relay combination in the prior art, wasting resources and having high maintenance costs, thereby increasing the capacitance of the onboard relay combination, improving the stability and reliability of the onboard relay combination, effectively utilizing resources and having low maintenance costs.

[0006] The present invention provides a method for processing failure of a track signal onboard relay, comprising:

[0007] Determine whether each relay is faulty based on the power-on waveforms at both ends of the coil of each relay in the onboard relay combination of the vehicle ATP device;

[0008] Determining a probability density function of the pull-in time according to the pull-in time of each normally open contact of the fault relay;

[0009] The probability density function is used to determine the capacitance that makes the probability of the on-board relay combination being closed greater than a first preset threshold, and the capacitance is used as the capacitance connected in parallel with the power supply in the on-board relay combination.

[0010] According to a method for handling failure of a track signal onboard relay provided by the present invention, the step of determining whether each relay is faulty according to the power-on waveforms at both ends of the coil of each relay in the onboard relay combination of the onboard ATP device comprises:

[0011] When the power-on waveform of any relay rises and remains unchanged, and then drops vertically, it is known that any relay has a fault; wherein the duration between the moment when the power-on waveform of any relay drops vertically and the moment when the discharge of the capacitor in parallel with any relay ends is less than a second preset threshold.

[0012] According to a method for handling failure of a track signal onboard relay provided by the present invention, before the step of determining the probability density function of the pull-in time according to the pull-in time of each normally open contact of the faulty relay, the method further includes:

[0013] Electrically connecting the positive pole of the coil of any fault relay to one end of each normally open contact of any fault relay;

[0014] The other end of each normally open contact is electrically connected to the positive pole of the coil of other relays in the onboard relay combination where any one of the fault relays is located;

[0015] Electrically connecting the negative pole of the coil of any one of the fault relays to the negative pole of the coil of the other relay;

[0016] The closing time of each normally open contact of any fault relay is determined according to the power-on waveforms of the coil of any fault relay and each normally open contact.

[0017] According to a method for handling failure of a track signal onboard relay provided by the present invention, the step of determining a probability density function of the pull-in time according to the pull-in time of each normally open contact of the faulty relay comprises:

[0018] According to the closing time of each normally open contact of each fault relay, the average closing time of all normally open contacts of each fault relay is obtained;

[0019] Calculate the mean and standard deviation of the average time corresponding to all faulty relays;

[0020] A probability density function of the pull-in time is determined according to the mean value and the standard deviation.

[0021] According to a method for processing failure of a track signal onboard relay provided by the present invention, the step of using the probability density function to determine the capacitance that makes the probability of the onboard relay combination being pulled in greater than a first preset threshold value comprises:

[0022] increasing the capacitance connected in parallel with the power source by a preset threshold value;

[0023] Calculating the discharge time of the capacitor connected in parallel with the power supply according to the increased capacitance;

[0024] The probability density function is used to calculate the corresponding pull-in probability of the onboard relay combination according to the capacitor discharge time, until the pull-in probability of the onboard relay combination is greater than a first preset threshold.

[0025] According to a method for processing failure of a track signal onboard relay provided by the present invention, the step of using the probability density function to calculate the corresponding pull-in probability of the onboard relay combination according to the capacitor discharge time includes:

[0026] Determining a first difference between the closing times of relays in the onboard relay assembly and a second difference between the closing times of normally open contacts of the relays;

[0027] Determining a time deviation corresponding to an aging degree of relays in the onboard relay assembly;

[0028] Determine the pull-in time corresponding to the onboard relay combination according to the capacitor discharge time, the first difference, the second difference and the time deviation;

[0029] The probability density function is used to determine the pull-in probability corresponding to the on-board relay combination according to the pull-in time corresponding to the on-board relay combination.

[0030] The present invention also provides a track signal onboard relay failure processing device, comprising:

[0031] A detection module, used to determine whether each relay is faulty according to the power-on waveforms at both ends of the coil of each relay in the on-board relay combination of the vehicle ATP device;

[0032] A calculation module, used for determining a probability density function of the pull-in time according to the pull-in time of each normally open contact of the fault relay;

[0033] A determination module is used to use the probability density function to determine the capacitance that makes the probability of the on-board relay combination being closed greater than a first preset threshold, and use the capacitance as the capacitance connected in parallel with the power supply in the on-board relay combination.

[0034] The present invention also provides an electronic 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 program, the method for handling failure of a track signal onboard relay as described above is implemented.

[0035] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for handling failure of a track signal onboard relay as described in any one of the above is implemented.

[0036] The present invention also provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the method for handling failure of a track signal onboard relay as described above is implemented.

[0037] The method and device for handling failure of a track signal onboard relay provided by the present invention detect a faulty relay from an onboard relay combination of an onboard ATP device according to a power-on waveform of the relay, test the pull-in time of the faulty relay, obtain a probability density function of the pull-in time, and use the probability density function to determine the capacitance of the normal output of the onboard relay combination. On the one hand, only the capacitance needs to be increased, which effectively utilizes resources and has low maintenance costs. On the other hand, by determining the appropriate capacitance, the stability and reliability of the output of the onboard relay combination are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 It is a schematic diagram of the onboard relay combination logic of the onboard ATP device provided by the prior art;

[0040] Figure 2 It is a flow chart of a method for handling failure of a track signal onboard relay provided by the present invention;

[0041] Figure 3 It is a schematic diagram of power-on waveforms at both ends of a relay coil in a method for handling failure of a track signal onboard relay provided by the present invention;

[0042] Figure 4It is a schematic diagram of a circuit for testing the closing time of a normally open contact of a relay in a method for handling a failure of a track signal onboard relay provided by the present invention;

[0043] Figure 5 It is a schematic diagram of the power-on waveform of the normally open contact of the relay in the method for handling failure of the track signal onboard relay provided by the present invention;

[0044] Figure 6 It is a structural schematic diagram of a track signal onboard relay failure processing device provided by the present invention;

[0045] Figure 7 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Combine the following Figure 2 A method for handling failure of a track signal onboard relay of the present invention is described, comprising:

[0048] Step 201, determining whether each relay is faulty according to the power-on waveforms at both ends of the coil of each relay in the onboard relay assembly of the vehicle ATP device;

[0049] The on-board ATP device generally has multiple on-board relay combinations, each with 4 relays. The connection logic between the relays is as follows: Figure 1 This embodiment does not limit the number of onboard relay combinations and the number of relays in each onboard relay combination.

[0050] In the case that the output of the on-board relay combination is invalid, a fault reproduction test is performed on the on-board relay combination, that is, the on-board relay combination is used again to input and output the track signal.

[0051] During the fault reproduction test, an oscilloscope is used to capture the power-on waveforms at both ends of each relay coil in the onboard relay combination, such as Figure 3 According to the power-on waveforms at both ends of the coils of relays 1, 2, 3 and 4, the reasons for the invalid output of the onboard relay combination are analyzed and the faulty relay is found.

[0052] Through Figure 3From the power-on waveform analysis, it can be seen that before the capacitor connected in parallel at both ends of the coil of relay No. 1 is discharged, relays No. 2 and No. 4 have been normally energized, and only relay No. 3 is not normally energized, resulting in no output of the onboard relay combination. Relay No. 3 is faulty.

[0053] Step 202, determining a probability density function of the pull-in time according to the pull-in time of each normally open contact of the fault relay;

[0054] The time required for each normally open contact of each fault relay to be closed is tested. The present embodiment is not limited to the test method. According to the closing time corresponding to the fault relay, the average value and variance of the closing time are counted to obtain a probability density function. The probability density function reflects the correlation between the closing time and the closing probability.

[0055] Step 203: Use the probability density function to determine the capacitance that makes the probability of the on-board relay combination being closed greater than a first preset threshold, and use the capacitance as the capacitance connected in parallel with the power supply in the on-board relay combination.

[0056] Through experiments, additional capacitors, such as 6.8uF, are soldered to the relay board, and the power supply and oscilloscope are connected. Then the discharge time of the parallel capacitor is tested after power-on. The test results show that the output of the onboard relay combination is normal.

[0057] The experimental results show that increasing the capacitance can prolong the pull-in holding time of the normally open contact of relay No. 1 in the on-board relay combination, that is, prolong the power-on time of relays No. 2, 3 and 4, and ensure that relays No. 2, 3 and 4 are normally pulled in, thereby ensuring the normal output of the on-board relay combination.

[0058] To utilize resources efficiently, a probability density function is used to determine the capacitance required for the normal output of the on-board relay combination.

[0059] This embodiment detects a faulty relay from the onboard relay combination of the on-board ATP device according to the power-on waveform of the relay, tests the pull-in time of the faulty relay, obtains the probability density function of the pull-in time, and uses the probability density function to determine the capacitance of the normal output of the onboard relay combination. On the one hand, only the capacitance needs to be increased, which effectively utilizes resources and has low maintenance costs. On the other hand, by determining the appropriate capacitance, the stability and reliability of the output of the onboard relay combination are guaranteed.

[0060] Based on the above embodiment, the step of determining whether each relay is faulty according to the power-on waveforms at both ends of the coil of each relay in the onboard relay combination of the vehicle-mounted ATP device in this embodiment includes:

[0061] When the power-on waveform of any relay rises and remains unchanged, and then drops vertically, it is known that any relay has a fault; wherein the duration between the moment when the power-on waveform of any relay drops vertically and the moment when the discharge of the capacitor in parallel with any relay ends is less than a second preset threshold.

[0062] like Figure 3 As shown, according to the power-on waveform of relay No. 3, it can be seen that relay No. 3 remains powered on for a period of time after being powered on, and then a voltage drop occurs, causing its normally open contact to not close, resulting in no output of the onboard relay combination.

[0063] After relay No. 3 was powered on for a period of time, the voltage dropped because the normally open contacts of relay No. 3 closed too slowly, and the capacitor in parallel at both ends of the coil of relay No. 1 was not normally attracted when the discharge was almost finished. As a result, the normally open contacts of relay No. 1 that powered on relay No. 3 changed from the attracted state to the disconnected state, causing the voltage across the coil of relay No. 3 to drop.

[0064] When relay coil No. 4 and relay coil No. 3 are powered on at the same time, relay coil No. 4 can be normally energized, which means that the closing pace of their normally open contacts is inconsistent, and the normally open contact of relay No. 3 closes more slowly.

[0065] This embodiment screens out faulty relays that take a long time to close by analyzing the power-on waveforms at both ends of the coil of each relay in a fault reproduction experiment, thereby improving the accuracy of faulty relay identification.

[0066] On the basis of the above embodiment, before the step of determining the probability density function of the pull-in time according to the pull-in time of each normally open contact of the fault relay, the present embodiment further includes:

[0067] Electrically connecting the positive pole of the coil of any fault relay to one end of each normally open contact of any fault relay;

[0068] The other end of each normally open contact is electrically connected to the positive pole of the coil of other relays in the onboard relay combination where any one of the fault relays is located;

[0069] Electrically connecting the negative pole of the coil of any one of the fault relays to the negative pole of the coil of the other relay;

[0070] The closing time of each normally open contact of any fault relay is determined according to the power-on waveforms of the coil of any fault relay and each normally open contact.

[0071] In order to test the closing time of each normally open contact of a single fault relay, it is necessary to test the power-on waveform when each normally open contact is closed. The specific test circuit is as follows: Figure 4 shown.

[0072] Assuming that relay No. 3 fails, Figure 4 The circuit diagram in the figure tests the closing time of the three normally open contacts of relay No. 3. Connect the 23V positive pole of the coil of relay No. 3 to one end of its three normally open contacts through a wire, and the other end of its three normally open contacts is connected to one end of the coil of relay No. 1, 2 and 4 respectively. The other end of the coil of relay No. 1, 2 and 4 is connected to the 23V negative pole of the coil of relay No. 3. Among them, relays No. 1, 2 and 4 can be replaced with additional relays for testing.

[0073] The test points of each normally open contact of relay No. 3 are the positive and negative poles of the other relay coils connected to each normally open contact, that is, the positive and negative poles of the coils of relays No. 1, 2 and 4.

[0074] After the circuit is connected, adjust the variable power supply voltage to 23V. Then use an oscilloscope to measure the power-on waveform of the No. 3 relay coil and its three normally open contacts. Figure 5 By analyzing the power-on waveform, the closing time of each normally open contact can be obtained based on the time between the power-on time of relay No. 3 and the power-on time of each normally open contact.

[0075] This embodiment connects an external power supply to the normally open contact of the fault relay and uses the coils of the other three relays as loads to measure the pull-in time of the three normally open contacts, thereby maximally simulating the application environment of the safety relay combination and improving the accuracy of the probability density function.

[0076] On the basis of the above embodiment, the step of determining the probability density function of the pull-in time according to the pull-in time of each normally open contact of the fault relay in this embodiment includes:

[0077] According to the closing time of each normally open contact of each fault relay, the average closing time of all normally open contacts of each fault relay is obtained;

[0078] Assume that 5 faulty relays are detected in all onboard relay combinations of the vehicle ATP device. In order to improve the accuracy of the test, the normally open contact pull-in time of each faulty relay is tested 10 times, and the test results are shown in Tables 1 to 5.

[0079] Table 1 Test results of normally open contact closing time of the first fault relay

[0080]

[0081]

[0082] Table 2 Test results of normally open contact closing time of the second fault relay

[0083]

[0084] Table 3 Test results of normally open contact closing time of the third fault relay

[0085]

[0086]

[0087] Table 4 Test results of the normally open contact closing time of the fourth fault relay

[0088]

[0089] Table 5 Test results of normally open contact closing time of the fifth fault relay

[0090]

[0091]

[0092] When the working voltage of the relay is 23V, if the closing time of the three normally open contacts of the relay obeys the law of normal distribution, the calculation results are shown in Table 6. Among them, the confidence interval of the closing time of each normally open contact of the relay is obtained by calculating the mean value x and variance s of the closing time of each normally open contact of the relay, and the confidence interval is (x-3s, x+3s).

[0093] Table 6 Calculation results of normally open contact closing time of fault relay

[0094]

[0095] The average closing time of the three normally open contacts of each fault relay is taken as the closing time of each fault relay at 23V.

[0096] Calculate the average value and standard deviation of the average time corresponding to all fault relays; and determine the probability density function of the pull-in time based on the average value and standard deviation.

[0097] The average value and standard deviation of the closing time of the five fault relays are calculated, and the average value μ = 15.57 and the standard deviation σ = 0.91 are obtained. The probability density function of the relay closing time is as follows:

[0098]

[0099] In this embodiment, the distribution of the contact closing time of the relay is obtained according to the normal distribution and repeated experiments, the discharge time of the discharge capacitor is calculated, and the appropriate capacitance value is determined to ensure the stability and reliability of the output circuit.

[0100] On the basis of the above embodiments, the step of using the probability density function to determine the capacitance that makes the probability of the on-board relay combination being closed greater than the first preset threshold in this embodiment includes:

[0101] increasing the capacitance connected in parallel with the power source by a preset threshold value;

[0102] Calculating the discharge time of the capacitor connected in parallel with the power supply according to the increased capacitance;

[0103] The probability density function is used to calculate the corresponding pull-in probability of the onboard relay combination according to the capacitor discharge time, until the pull-in probability of the onboard relay combination is greater than a first preset threshold.

[0104] The capacitor is connected in parallel with the power supply of the onboard relay combination, that is, in parallel at both ends of the coil of relay No. 1. Optionally, the preset threshold is 6.8μF, and the capacitance of each capacitor is 13.6μF. After adding the capacitor, two 6.8μF / 63V capacitors are connected in parallel at both ends of the coil of relay No. 1, which is equivalent to a total capacitance of 13.6μF, which delays the disconnection of the relay. When the external drive voltage is constant, increasing the capacitance of the capacitor can increase the pull-in holding time of the normally open contact of the start relay, that is, relay No. 1, that is, prolonging the power-on time of the coils of the next three relays, which can ensure the normal pull-in of the next three relays, thereby ensuring the normal output of the safety circuit.

[0105] By testing the voltage waveform at both ends of relay coil No. 1, it can be seen that after adding one capacitor, the circuit discharge time T = 20.2ms.

[0106] Assuming the standard value of the coil resistance of the two capacitors is R = 720Ω, the final voltage V1 of the capacitor is 0V, the rated release voltage Vt of the relay is 2.4V, the initial discharge voltage of the capacitor is between 18V-24V, and the initial discharge voltage V0 of the capacitor is 23V. According to the calculation formula, the discharge time of the capacitor is theoretically calculated as follows:

[0107] T=RC*ln[(V1-V0) / (V1-Vt)]=RC*ln9.6=22ms.

[0108] Since the actual measured time for the capacitor to discharge from 23V to 2.4V is 20.2ms, which is close to the theoretical value of 22ms, it means that the theoretical value is consistent with the actual measured value. The probability density function is used to calculate the pull-in probability using the theoretical value. If the pull-in probability is less than or equal to the first preset threshold, such as 99%, then another capacitor is connected in parallel and the total capacitance is about 20μF. By testing the voltage waveform at both ends of the No. 1 relay coil, it can be seen that the circuit discharge time T = 28ms after adding one capacitor.

[0109] The discharge time under the three capacitors is calculated according to the calculation formula as follows:

[0110] T=RC*ln[(V1-V0) / (V1-Vt)]=RC*ln9.6=32ms.

[0111] Since the actual measured time for the capacitor to discharge from 23V to 2.4V is 28ms, which is close to the theoretical value of 32ms, it means that the theoretical value is consistent with the actual measured value, and the probability density function is used to calculate the pull-in probability. If the pull-in probability is greater than the first preset threshold, such as 99%, it is determined to use 3 capacitors for discharge so that the relays in the onboard relays can be stably pulled up.

[0112] This embodiment calculates the capacitor discharge time by gradually increasing the capacitance, and uses a probability density function to determine a suitable capacitance value according to the capacitor discharge time, thereby ensuring the stability and reliability of the output loop.

[0113] Based on the above embodiment, the step of using the probability density function to calculate the corresponding pull-in probability of the onboard relay combination according to the capacitor discharge time in this embodiment includes:

[0114] Determining a first difference between the closing times of relays in the onboard relay assembly and a second difference between the closing times of normally open contacts of the relays;

[0115] According to the working principle of the onboard relay combination, the discharge time of the parallel capacitor must be greater than the longest closure time of relays 2, 3 and 4, and there must be a certain margin to ensure that after the normally open contact of relay 1 is disconnected, the next three relays can be closed.

[0116] Because the first relay among the last three relays to be energized will cut off the external 24V power supply at both ends of the coil of relay No. 1, the discharge of the parallel capacitor is required to maintain the closure of the normally open contacts of relay No. 1, thereby ensuring the duration of the external 24V power supply to the collars of the last three relays so that the last three relays can be energized normally.

[0117] The input signal voltage of the relay on the onboard relay assembly is the output signal of the output board. The 24V power supply output by the 24V power supply board is input to the relay board after passing through the F48 plug, the backplane and the photorelay. Due to the influence of the line, the voltage may have some voltage drop. By measuring the input voltage of the faulty relay board more than 100 times, it is found that the driving voltage range is 22.8V to 23.6V, which is greater than the design voltage of 22V, so the influence of voltage on the relay can be ignored.

[0118] Figure 1Relay No. 1 is the start relay, and relays No. 2, 3, and 4 are load relays. The three normally open contacts of relay No. 1 are closed to the coils of relays No. 2, 3, and 4. The speed of the three normally open contacts of relay No. 1 will affect the power-on time of the corresponding relay coils. The difference in the pickup time of relays No. 2, 3, and 4 will also affect the output of the onboard relay combination, because any of the three relays will cut off the external voltage of relay No. 1, causing the capacitor in parallel with its coil to start discharging. If any relay fails to pull in normally during the capacitor discharge process, the safety circuit will have no output.

[0119] Optionally, the pull-in time of the three normally open contacts of relay No. 1 is determined by testing, and the difference between the maximum value and the minimum value is determined, which is used as the second difference. The pull-in time of the three normally open contacts of relays No. 2, 3 and 4 is determined by testing, and the average value of the pull-in time of the three normally open contacts of each relay is calculated, which is used as the pull-in time of each relay. The difference between the maximum value and the minimum value of the pull-in time of the three relays is used as the first difference.

[0120] Determining a time deviation corresponding to an aging degree of relays in the onboard relay assembly;

[0121] The aging degree of the relay is divided into grades, and each grade corresponds to a corresponding time deviation. The maximum value of the time deviations corresponding to the relays in the onboard relay combination is taken as the time deviation corresponding to the onboard relay combination.

[0122] Determine the pull-in time corresponding to the onboard relay combination according to the capacitor discharge time, the first difference, the second difference and the time deviation;

[0123] Optionally, the first difference, the second difference and the time deviation are added, and the addition result is subtracted from the capacitor discharge time to obtain the corresponding pull-in time of the on-board relay combination.

[0124] The probability density function is used to determine the pull-in probability corresponding to the on-board relay combination according to the pull-in time corresponding to the on-board relay combination.

[0125] The pull-in time corresponding to the on-board relay combination is substituted into the probability density function for calculation to obtain the pull-in probability corresponding to the on-board relay combination.

[0126] For example, when the parallel capacitance is 13.6 μF, considering the pull-in difference between the normally open contacts of relay No. 1 and the pull-in difference between different relays, the pull-in probability of the onboard relay combination is calculated as:

[0127] F(x)=98.5%

[0128] If the relay contact aging has a 1ms deviation, the probability of the onboard relay combination being closed is:

[0129] F(x)=95%

[0130] If the relay contact aging has a 2ms deviation, the probability of the onboard relay combination being closed is:

[0131] F(x)=89%

[0132] From the above calculation results, it can be seen that the failure rate of the original design is 1.5%. If the delay of the relay contact after aging is taken into account, the failure rate of the original design is between 5% and 11%.

[0133] When the parallel capacitance is 20μF, considering the pull-in differences between the normally open contacts of relay No. 1 and between different relays, the pull-in probability of the onboard relay combination is calculated as:

[0134] F(x)=100%.

[0135] If the relay contact aging has a 3ms deviation, the probability of relay closure is calculated as:

[0136] F(x)=99.999%.

[0137] From the above calculation results, it can be seen that when a 6.8uF capacitor is connected in parallel, that is, the total capacitance C = 20us, considering that the relay pull-in time has a 3ms deviation, the failure rate is 0.001%, which meets the design requirements.

[0138] Therefore, by adding a 6.8μF / 63V capacitor in parallel to the original design or using two 10μF / 63V capacitors to make the total capacitance 20μF, the reliability of the subsequent relay can be improved, and the failure rate can be reduced to 0 to 0.001%.

[0139] This embodiment corrects the discharge capacitor size by considering the pull-in difference between the normally open contacts of the starter relay and the pull-in difference between the load relays, as well as the aging of the relays, thereby improving the reliability of the track signal onboard relay combination output circuit.

[0140] The track signal onboard relay failure processing device provided by the present invention is described below. The track signal onboard relay failure processing device described below and the track signal onboard relay failure processing method described above can correspond to each other.

[0141] like Figure 6 As shown, the device includes a detection module 601, a calculation module 602 and a determination module 603, wherein:

[0142] The detection module 601 is used to determine whether each relay is faulty according to the power-on waveforms at both ends of the coil of each relay in the onboard relay combination of the vehicle ATP device;

[0143] The calculation module 602 is used to determine the probability density function of the pull-in time according to the pull-in time of each normally open contact of the fault relay;

[0144] The determination module 603 is used to use the probability density function to determine the capacitance that makes the probability of the on-board relay combination being closed greater than a first preset threshold, and use the capacitance as the capacitance connected in parallel with the power supply in the on-board relay combination.

[0145] This embodiment detects a faulty relay from the onboard relay combination of the on-board ATP device according to the power-on waveform of the relay, tests the pull-in time of the faulty relay, obtains the probability density function of the pull-in time, and uses the probability density function to determine the capacitance of the normal output of the onboard relay combination. On the one hand, only the capacitance needs to be increased, which effectively utilizes resources and has low maintenance costs. On the other hand, by determining the appropriate capacitance, the stability and reliability of the output of the onboard relay combination are guaranteed.

[0146] Figure 7 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 7 As shown, the electronic device may include: a processor 710, a communication interface 720, a memory 730 and a communication bus 740, wherein the processor 710, the communication interface 720 and the memory 730 communicate with each other through the communication bus 740. The processor 710 may call the logic instructions in the memory 730 to execute the track signal onboard relay failure processing method, the method comprising: determining whether each relay is faulty according to the power-on waveforms at both ends of the coil of each relay in the onboard relay combination of the onboard ATP device; determining the probability density function of the pull-in time according to the pull-in time of each normally open contact of the faulty relay; using the probability density function to determine the capacitance that makes the pull-in probability of the onboard relay combination greater than the first preset threshold, and using the capacitance as the capacitance connected in parallel with the power supply in the onboard relay combination.

[0147] In addition, the logic instructions in the above-mentioned memory 730 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the 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 for 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 the present invention. 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.

[0148] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the rail signal onboard relay failure processing method provided by the above-mentioned methods, the method including: determining whether each relay has a fault according to the power-on waveform at both ends of the coil of each relay in the onboard relay combination of the on-board ATP device; determining the probability density function of the pull-in time according to the pull-in time of each normally open contact of the faulty relay; using the probability density function to determine the capacitance that makes the pull-in probability of the onboard relay combination greater than a first preset threshold, and using the capacitance as the capacitance connected in parallel with the power supply in the onboard relay combination.

[0149] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the rail signal onboard relay failure processing method provided by the above-mentioned methods, the method comprising: determining whether each relay has a fault according to the power-on waveform at both ends of the coil of each relay in the onboard relay combination of the vehicle-mounted ATP device; determining the probability density function of the pull-in time according to the pull-in time of each normally open contact of the faulty relay; using the probability density function to determine the capacitance that makes the pull-in probability of the onboard relay combination greater than a first preset threshold, and using the capacitance as the capacitance connected in parallel with the power supply in the onboard relay combination.

[0150] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0151] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0152] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for handling failure of a track signal onboard relay, characterized in that: include: Determine whether each relay is faulty based on the power-on waveforms at both ends of the coil of each relay in the onboard relay combination of the vehicle ATP device; Determining a probability density function of the pull-in time according to the pull-in time of each normally open contact of the fault relay; Using the probability density function to determine the capacitance that makes the probability of the on-board relay combination being closed greater than a first preset threshold, and using the capacitance as the capacitance connected in parallel with the power supply in the on-board relay combination; The step of determining whether each relay is faulty according to the power-on waveforms at both ends of the coil of each relay in the onboard relay combination of the onboard ATP device comprises: When the power-on waveform of any relay remains unchanged after rising and then drops vertically, it is known that any relay has a fault; wherein the time between the moment when the power-on waveform of any relay drops vertically and the moment when the discharge of the capacitor connected in parallel to any relay ends is less than a second preset threshold; The step of determining the probability density function of the pull-in time according to the pull-in time of each normally open contact of the fault relay comprises: According to the closing time of each normally open contact of each fault relay, the average closing time of all normally open contacts of each fault relay is obtained; Calculate the mean and standard deviation of the average time corresponding to all faulty relays; Determine the probability density function of the pull-in time according to the mean value and the standard deviation; The step of using the probability density function to determine the capacitance that makes the probability of the on-board relay combination being closed greater than a first preset threshold value comprises: increasing the capacitance connected in parallel with the power source by a preset threshold value; Calculating the discharge time of the capacitor connected in parallel with the power supply according to the increased capacitance; The probability density function is used to calculate the corresponding pull-in probability of the onboard relay combination according to the capacitor discharge time, until the pull-in probability of the onboard relay combination is greater than a first preset threshold.

2. The method for handling failure of a track signal onboard relay according to claim 1, characterized in that: Before the step of determining the probability density function of the pull-in time according to the pull-in time of each normally open contact of the fault relay, the method further includes: Electrically connecting the positive pole of the coil of any fault relay to one end of each normally open contact of any fault relay; The other end of each normally open contact is electrically connected to the positive pole of the coil of other relays in the onboard relay combination where any one of the fault relays is located; Electrically connecting the negative pole of the coil of any one of the fault relays to the negative pole of the coil of the other relay; The closing time of each normally open contact of any fault relay is determined according to the power-on waveforms of the coil of any fault relay and each normally open contact.

3. The method for handling failure of a track signal onboard relay according to claim 1, characterized in that: The step of using the probability density function to calculate the corresponding pull-in probability of the onboard relay combination according to the capacitor discharge time includes: Determining a first difference between the closing times of relays in the onboard relay assembly and a second difference between the closing times of normally open contacts of the relays; Determining a time deviation corresponding to an aging degree of relays in the onboard relay assembly; Determine the pull-in time corresponding to the onboard relay combination according to the capacitor discharge time, the first difference, the second difference and the time deviation; The probability density function is used to determine the pull-in probability corresponding to the on-board relay combination according to the pull-in time corresponding to the on-board relay combination.

4. A track signal onboard relay failure processing device, characterized in that: include: A detection module, used to determine whether each relay is faulty according to the power-on waveforms at both ends of the coil of each relay in the on-board relay combination of the vehicle ATP device; A calculation module, used for determining a probability density function of the pull-in time according to the pull-in time of each normally open contact of the fault relay; A determination module, configured to use the probability density function to determine a capacitance that makes the probability of the on-board relay combination being closed greater than a first preset threshold, and use the capacitance as a capacitance connected in parallel with a power source in the on-board relay combination; The step of determining whether each relay is faulty according to the power-on waveforms at both ends of the coil of each relay in the onboard relay combination of the onboard ATP device includes: When the power-on waveform of any relay remains unchanged after rising and then drops vertically, it is known that any relay has a fault; wherein the time between the moment when the power-on waveform of any relay drops vertically and the moment when the discharge of the capacitor connected in parallel to any relay ends is less than a second preset threshold; Determining the probability density function of the pull-in time according to the pull-in time of each normally open contact of the fault relay includes: According to the closing time of each normally open contact of each fault relay, the average closing time of all normally open contacts of each fault relay is obtained; Calculate the mean and standard deviation of the average time corresponding to all faulty relays; Determine the probability density function of the pull-in time according to the mean value and the standard deviation; The method of using the probability density function to determine the capacitance that makes the probability of the on-board relay combination being closed greater than a first preset threshold value includes: increasing the capacitance connected in parallel with the power source by a preset threshold value; Calculating the discharge time of the capacitor connected in parallel with the power supply according to the increased capacitance; The probability density function is used to calculate the corresponding pull-in probability of the onboard relay combination according to the capacitor discharge time, until the pull-in probability of the onboard relay combination is greater than a first preset threshold.

5. An electronic 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 program, the method for handling failure of a track signal onboard relay as claimed in any one of claims 1 to 3 is implemented.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for handling failure of a track signal onboard relay as claimed in any one of claims 1 to 3 is implemented.

7. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for handling failure of a track signal onboard relay as claimed in any one of claims 1 to 3 is implemented.

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