Integrated rim type wheel sensor axle counting interference identification system and method

Abstract

The invention discloses an integrated rim type wheel sensor axle counting interference recognition system and method. The method comprises the steps that S1, information of wheels passing above a first wheel sensor SYS1 and a second wheel sensor SYS2 is collected through the first wheel sensor SYS1 and the second wheel sensor SYS2; s2, sequentially performing AD acquisition, filtering, differentiation and analog-to-digital conversion processing on the received wheel information through an evaluation board to obtain a corresponding digital pulse signal; and S3, performing logic judgment processing on the obtained digital pulse signal through an axle counting logic processing module to obtain abnormal / normal pulse identification information, and identifying interference to perform redundancy. According to the symmetrical design of the integrated sensor, logic processing calculation can be carried out through ingenious combination of train speed, section occupation / idle information, direction information, pulse width relation and other information, the axle counting error situation caused by most of electromagnetic interference can be effectively recognized, and on the premise that safety is guaranteed, the accuracy of axle counting is greatly improved. And the availability of the axle recording equipment is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of train safety protection, and in particular relates to an integrated wheel rim sensor axle counter interference identification system and method. Background Art

[0002] With the rapid development of various rail transits in China, axle counting equipment, as an important train position inspection equipment, has been widely used in various rail transit fields such as national railways, urban rails, magnetic levitation, trams, rubber-wheeled trams, and ground automatic over-equalization. Since the axle counting equipment uses active electromagnetic induction technology to realize the axle counting function, in actual use, due to external human or strong electromagnetic interference, the axle counting equipment may cause the occurrence of incorrect axle counting or abnormal occupancy. At present, there is a certain redundancy for the incorrect axle counting of the axle counting points in the administrator section through the administrator section, but for axle counting points in separate sections or without administrator section management, it is impossible to achieve a certain redundancy for the incorrect axle counting caused by interference, which may reduce the availability of the equipment in actual use. With the development in recent years, various rail transits are basically closed sections, and human interference basically does not occur. The interference mainly comes from strong electromagnetic interference. Therefore, it is necessary to design a method to identify electromagnetic interference pulses, and then make logical judgments and redundancies on the incorrect axle counting caused by electromagnetic interference, so as to improve the availability of the equipment. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the integrated wheel rim wheel sensor axle counter interference identification system and method provided by the present invention solves the interference redundancy problem caused by electromagnetic interference during the use of the integrated sensor axle counter system.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is: an integrated rim-type wheel sensor axle counter interference identification system, comprising: a sensor module, an evaluation board and an axle counter logic processing module;

[0005] The sensor module includes a first wheel sensor SYS1 and a second wheel sensor SYS2 of an integrated structure, which are used to detect and identify the direction of the wheels passing over it to obtain wheel information;

[0006] The evaluation board is connected to the first wheel sensor SYS1 and the second wheel sensor SYS2, and is used to perform signal conversion on the wheel information collected by the evaluation board to obtain corresponding digital pulse signals;

[0007] The axle counting logic processing module is connected to the evaluation board and is used to perform logic discrimination processing on the received digital pulse signal, obtain abnormal / normal pulse identification information, and identify interference for redundancy.

[0008] The beneficial effects of the present invention are:

[0009] The wheel sensors SYS1 and SYS2 in the system of the present invention adopt an integrated structural design. The two systems are integrated together with a fixed physical horizontal distance, which provides a relatively stable calculation basis for the subsequent intelligent logic judgment and identification of electronic interference by the axle counting logic processing unit. The evaluation board can filter some high-frequency noises through software and hardware filtering algorithms. The axle counting logic processing module uses the pulse logic, direction information, pulse width, speed information analysis, etc. of the two axle counting systems SYS1 and SYS2 at the same axle counting point to perform comprehensive logic judgment processing, which can effectively identify and process abnormal pulses caused by electromagnetic interference.

[0010] Further, the first wheel sensor SYS1 and the second wheel sensor SYS2 are symmetrically arranged and are at the same height in the horizontal direction;

[0011] The first wheel sensor SYS1 and the second wheel sensor SYS2 have the same operating frequency and receiving sensitivity, and the blocked action distances of the first wheel sensor SYS1 and the second wheel sensor SYS2 when the same wheel passes over them are completely consistent.

[0012] The beneficial effects of the above further scheme are:

[0013] The wheel sensor systems SYS1 and SYS2 in the present invention are designed in an integrated symmetrical manner, so that the sensors SYS1 and SYS2 have consistent sensitivity to the wheelset. At the same speed, the obstruction width of the same wheelset after being sensed by SYS1 and SYS2 is basically the same. The train speed can be calculated through the relatively fixed physical distance between SYS1 and SYS2 and the consistent sensitivity to the same wheelset.

[0014] Furthermore, the first evaluation board and the second evaluation board have the same structure, and both include:

[0015] The hardware processing unit is used to perform AD acquisition and high-frequency filtering processing on the wheel information collected by the wheel sensor connected thereto;

[0016] The software processing unit is used to perform software filtering on the signal processed by the hardware processing unit, and to differentiate the obstructed and non-obstructed values ​​through software anti-jitter processing, and to convert the processed analog signal into a digital pulse signal for transmission to the axle counting logic processing module; wherein the software anti-jitter processing includes median value filtering and sliding average filtering algorithms.

[0017] The beneficial effects of the above further scheme are:

[0018] In the present invention, the evaluation board performs software and hardware filtering on the sensor collected information to filter out the high-frequency noise in the sensor signal, and uses software anti-shake processing technology to differentiate the obstructed and non-obstructed values. After multiple processing of the sensor information, the analog signal is converted into a digital pulse signal and sent to the axle counting logic processing unit for axle pulse processing.

[0019] A method for identifying axle counter interference of an integrated rim-type wheel sensor comprises the following steps:

[0020] S1, collecting information of wheels passing over it through a first wheel sensor SYS1 and a second wheel sensor SYS2;

[0021] S2, performing AD acquisition, filtering, differentiation and analog-to-digital conversion processing on the wheel information received by the evaluation board in sequence to obtain a corresponding digital pulse signal;

[0022] S3. Perform logic judgment processing on the obtained digital pulse signal through the axle counting logic processing module to obtain abnormal / normal pulse identification information, and identify interference for redundancy.

[0023] The beneficial effects of the present invention are:

[0024] The present invention can perform logical processing and calculation based on the symmetrical design of the integrated sensor by cleverly combining information such as train speed, section occupancy / idleness information, direction information, pulse width relationship, etc., and can effectively identify most of the miscounted axles caused by electromagnetic interference, thereby greatly improving the availability of the equipment while ensuring safety.

[0025] Furthermore, in step S2, the evaluation board differentiates the obstructed value and the non-obstructed value of the wheel information it receives through software anti-shake processing, and the value of the obstructed point is lower than the value of the obstructed recovery to the non-obstructed point. The processing method is specifically as follows:

[0026] Assume that the signal value of the first / second wheel sensor SYS1 / SYS2 when collecting no wheel information is X / Y;

[0027] When the signal value X / Y drops below 80%X / 80%Y, it is determined that the first / second wheel sensor SYS1 / SYS2 is blocked, and 80%X / 80%Y is used as the blocking point of the first / second wheel sensor SYS1 / SYS2;

[0028] When the signal value gradually increases from below 80%X / 80%Y to above 90%X / 90%Y, it is determined that the first / second wheel sensor SYS1 / SYS2 has recovered from obstruction to unobstructed, and 90%X / 90%Y is used as the value of the unobstructed point of the first / second wheel sensor SYS1 / SYS2.

[0029] The beneficial effects of the above further scheme are:

[0030] The anti-shake processing method can effectively prevent the wheel shaking or other weak interference during the vehicle passing process from causing repeated obstruction and unobstructed jumps of the sensor signal pulse, thereby affecting the normal axle counting function.

[0031] Furthermore, the step S3 includes the following sub-steps:

[0032] S31, setting an abnormal pulse corresponding table;

[0033] S32, collecting and sequentially recording the widths of the pulse signals SX1, SX2, S1, and S2 according to the digital pulse relationship of the digital pulse signal SYS1" / SYS2" after analog-to-digital conversion corresponding to the blocked point of the first / second wheel sensor SYS1 / SYS2;

[0034] Wherein, when the train is running in the forward direction, SX1 is a pulse signal from the blocked point A of the first wheel sensor SYS1 to the blocked point B of the second wheel sensor SYS2; SX2 is a pulse signal from the unblocked point C of the first wheel sensor SYS1 to the unblocked point D of the second wheel sensor SYS2; S1 is a pulse signal from the blocked point A of the first wheel sensor SYS1 to the unblocked point C of the first wheel sensor SYS1; S2 is a pulse signal from the blocked point B of the second wheel sensor SYS2 to the unblocked point D of the second wheel sensor SYS2;

[0035] When the train is running in the reverse direction, SX1 is a pulse signal from the non-obstructed point A of the first wheel sensor SYS1 to the non-obstructed point B of the second wheel sensor SYS2; SX2 is a pulse signal from the obstructed point C of the first wheel sensor SYS1 to the obstructed point D of the second wheel sensor SYS2; S1 is a pulse signal from the non-obstructed point A of the first wheel sensor SYS1 to the obstructed point C of the first wheel sensor SYS1; S2 is a pulse signal from the non-obstructed point B of the second wheel sensor SYS2 to the obstructed point D of the second wheel sensor SYS2;

[0036] S33, comparing the widths of SX1, SX2, S1, and S2 to identify normal pulses and abnormal pulses;

[0037] S34. After SX1, SX2, S1, and S2 meet the pulse width requirements, normal pulses are counted according to the axle counting logic; combined with the direction, vehicle speed, and section occupancy / idle information, abnormal pulses are counted normally or identified as interference for redundancy.

[0038] The beneficial effects of the above further scheme are:

[0039] By presetting the abnormal pulse type in the software in advance, during the actual software processing, the abnormal pulse can be quickly identified by comparing the real-time pulse judgment with the preset abnormal pulse. Combined with the direction information, vehicle speed, and section occupancy / idleness information, the pulse that needs normal axle counting processing or is identified as interference and redundant can be identified.

[0040] Further, in the step S31, in the abnormal pulse correspondence table, the correspondence between the abnormal pulse type and the pulse width and ratio includes:

[0041] Type 1: S1<3.0mS, S2<3.0mS, SX1<1.5mS or SX2<1.5mS;

[0042] Type 2: only S1 or S2;

[0043] Type 3: SX1>S1;

[0044] Type 4: SX2>S2;

[0045] Type 5: The width of S1 is more than 3 times the width of SX1;

[0046] Type 6: The width of S2 is more than 3 times the width of SX2;

[0047] Type 7: The width difference between SX1 and SX2 is greater than 50%;

[0048] Type 8: The width difference between S1 and S2 is greater than 50%.

[0049] The beneficial effects of the above further scheme are:

[0050] In the above scheme, through the symmetrical design of the integrated sensor and the relationship between the physical action distance and the wheel and vehicle speed, a corresponding table is preset for possible abnormal pulses. The subsequently collected pulse width is compared with this preset table to compare the normal pulse waveform and different types of abnormal pulse waveforms, so as to provide data support for whether subsequent abnormal interference pulses are redundantly processed.

[0051] Furthermore, in step S32, the method of collecting and sequentially recording the widths of the pulse signals SX1, SX2, S1, and S2 is specifically as follows:

[0052] If the pulse signal starts from SX1, the pulse width value is recorded in the order of SX1, S1, S2, and SX2. When the pulse width is greater than or equal to 20mS, it is recorded as 20mS. When it is less than 20mS, the actual pulse width value is recorded and the record is marked as a positive axis counter mark.

[0053] If the pulse signal starts from SX2, the pulse width value is recorded in the order of SX2, S2, S1, and SX1. When the pulse width is greater than or equal to 20mS, it is recorded as 20mS. When it is less than 20mS, the actual pulse width value is recorded and the record is marked as a reverse axle counting mark.

[0054] The beneficial effects of the above further scheme are:

[0055] In the above scheme, several key judgment values ​​SX1, S1, S2, and SX2 in the blocked pulse of the sensor are collected and recorded in real time. In order to reduce the amount of data, if the pulse is greater than 20mS, it is recorded as 20mS, and if it is less than or equal to 20mS, the actual value is recorded, and the positive and negative directions are marked for subsequent judgment.

[0056] Furthermore, the step S33 is specifically as follows:

[0057] According to the pulse width values ​​recorded by SX1, S1, S2, and SX2, they are compared with the pulse types in the abnormal pulse corresponding table, and classified into normal pulses and abnormal pulses according to the comparison results;

[0058] Among them, in the abnormal pulse:

[0059] Type 1 abnormal pulses are directly marked as interference and are not processed further;

[0060] Abnormal pulses of type 2, type 3 and type 4 are directly marked as interference and the number of times is recorded. When the number of times reaches the preset value, the system is treated as a fault.

[0061] For abnormal pulses of type 5, type 6, type 7 and type 8, the abnormal pulses that require axle counting processing are marked.

[0062] The beneficial effects of the above further scheme are:

[0063] By collecting the pulse records of SX1, SX2, S1, and S2 and comparing them with the preset abnormal pulse correspondence table, normal pulses and abnormal pulses are identified, and the abnormal pulse type is marked according to the abnormal pulse correspondence table, which is convenient for subsequent axle counting and redundant processing.

[0064] Furthermore, in step S34, the abnormal pulses identified as type 5, type 6, type 7 and type 8 are counted, and the current axis is marked as an abnormal pulse axis;

[0065] The method of combining direction, vehicle speed and section occupied / idle information to perform normal axle counting or identify interference for redundancy is:

[0066] When the section is idle, an abnormal pulse appears, and the second axis pulse does not appear within a delay of 1S, the abnormal pulse is redundant, and the redundant 1 axis identification is recorded, and an alarm message is output at the same time to notify the maintenance personnel to check the equipment;

[0067] When the section is idle, an abnormal pulse appears, and the second axis pulse appears within a delay of 1S. When the pulse width is less than 20mS, the abnormal pulse is treated as a normal pulse for axle counting. When the pulse width is equal to 20mS or the axle counting direction is different, the abnormal pulse is treated as an abnormal pulse and does not participate in the section occupation / idle processing. Only the current axis remains in the section. When the section is idle, it is cleared after a delay of 30S, and an alarm message is output at the same time.

[0068] When the section is occupied, an abnormal pulse appears and then the current abnormal pulse appears, the section is just idle, and after a delay of 1S, the second axis pulse does not appear. When the width of the previous pulse is less than 20mS, the abnormal pulse is treated as a normal pulse for axle counting; when the width of the previous pulse is equal to 20mS or the axle counting direction is different, the abnormal pulse is treated as an abnormal pulse, which does not participate in the section occupation / idle processing, and only the current axis remains in the section. When the section is idle, it is cleared after a delay of 30S, and an alarm message is output at the same time;

[0069] When the section is occupied, when the last pulse of the axle counting is a normal pulse, and there is no second axle pulse after a delay of 1S, if there has been an abnormal pulse in this round of axle counting sequence, and the section is idle including the current abnormal pulse, the abnormal pulse will be treated as a normal pulse for axle counting; otherwise, it will be treated as an abnormal pulse, cleared after a delay of 30S, and an alarm message will be output at the same time.

[0070] The beneficial effects of the above further scheme are:

[0071] In the above scheme, independent axle counting processing is performed on normal axle pulses and abnormal axle pulse information that meets the axle counting timing, and an independent judgment program is used for abnormal axle pulse judgment, thereby realizing the independence of axle pulse calculation and modular design of software.

[0072] By performing logical processing on comprehensive information such as train speed, section occupancy / idleness information, direction, and different delay times, and cleverly applying logical processing algorithms while ensuring equipment safety, most of the miscounted axles caused by electromagnetic interference are reduced, thereby improving equipment availability. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1 Shown is a schematic diagram of the system structure provided by an embodiment of the present invention.

[0074] Figure 2 Shown is a schematic diagram of a normal shaft pulse provided by an embodiment of the present invention.

[0075] Figure 3 FIG. 1 is a schematic diagram of a single system abnormal pulse provided by an embodiment of the present invention.

[0076] Figure 4 FIG. 4 is a schematic diagram of non-overlapping abnormal pulses provided by an embodiment of the present invention.

[0077] Figure 5 It is a schematic diagram of abnormal pulses occurring simultaneously in dual systems provided by an embodiment of the present invention.

[0078] Figure 6 Shown is a schematic diagram of different abnormal pulses of dual systems provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0079] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0080] Embodiment 1:

[0081] In an embodiment of the present invention, an integrated rim-type wheel sensor axle counter interference recognition system is provided. Figure 1 As shown, it includes: a sensor module, an evaluation board and an axle counting logic processing module;

[0082] The sensor module includes a first wheel sensor SYS1 and a second wheel sensor SYS2 of an integrated structure, which are used to detect and identify the direction of the wheels passing over it to obtain wheel information;

[0083] The evaluation board is connected to the first wheel sensor SYS1 and the second wheel sensor SYS2, and is used to convert the wheel information collected by the evaluation board into a corresponding digital pulse signal.

[0084] The axle counting logic processing module is connected to the evaluation board and is used to perform logic discrimination processing on the received digital pulse signal, obtain abnormal / normal pulse identification information, and identify interference for redundancy.

[0085] In this embodiment, Figure 1 In the figure, the first wheel sensor SYS1 and the second wheel sensor SYS2 are symmetrically arranged and at the same height in the horizontal direction; the working frequencies and receiving sensitivities of the first wheel sensor SYS1 and the second wheel sensor SYS2 are the same, and the distances at which the first wheel sensor SYS1 and the second wheel sensor SYS2 are blocked by the same wheel passing thereover are completely consistent.

[0086] In this embodiment Figure 1 In the embodiment, the sensor module J1 and the sensor module J2 have the same structure and are arranged on the section where the train passes, forming a 1G section, which are respectively connected to an evaluation board J1 and an evaluation board J2, and are connected to the same axle counting logic processing module.

[0087] In this embodiment, the transmitting and receiving coils of the first / second wheel sensor (SYS1 / SYS2) are integrated in a closed housing. Figure 1 In the system, SYS1 and SYS2 are used to detect and identify the direction of the wheels passing over the sensors to obtain wheel information.

[0088] Specifically, the train speed can be calculated by the relatively fixed physical distance between SYS1 and SYS2 and the consistent sensitivity of the same wheelset; Figure 2 In the figure, the wheel moves from the direction of SYS1 to the direction of SYS2. The position where the wheel causes SYS1 to be blocked is A, and the position where it recovers from being blocked is C. The position where the wheel causes SYS2 to be blocked is B, and the position where it recovers from being blocked is D.

[0089] Since the above-mentioned SYS1 and SYS2 adopt an integrated symmetrical design, the obstruction distance AC(L1) of SYS1 will be affected by the size of the wheel. The larger the wheel, the larger the obstruction width, and the smaller the wheel, the smaller the obstruction width; the obstruction distance BD(L2) of SYS2 will be affected by the size of the wheel. The larger the wheel, the larger the obstruction width, and the smaller the wheel, the smaller the obstruction width; therefore, the obstruction distances AC(L1) and BD(L2) of the same wheel pair SYS1 and SYS2 should theoretically be the same.

[0090] The relatively fixed physical distance between SYS1 and SYS2, plus the consistent sensitivity to the same wheelset, means that regardless of wheel size, as long as the same wheel passes the sensor, the absolute physical positions of the blocked starting point A of SYS1 and the blocked starting point B of SYS2 will change, but the relative physical distance between points A and B remains fixed, that is, when a large wheel passes the sensor, points A and B move forward the same distance at the same time, and when a small wheel passes the sensor, points A and B move backward the same distance at the same time.

[0091] Similarly, the absolute physical positions of point C where SYS1 is obstructed and restored to unobstructed and point D where SYS2 is obstructed and restored to unobstructed will change, but the relative physical distance between points C and D remains fixed, that is, when the large wheel passes the sensor, points C and D move backwards the same distance at the same time, and when the small wheel passes the sensor, points C and D move forward the same distance at the same time. This provides a basis for judgment for the subsequent axle counting logic processing module to perform speed calculation.

[0092] In the embodiment of the present invention, the first evaluation board and the second evaluation board have the same structure, and both include:

[0093] The hardware processing unit is used to perform AD acquisition and high-frequency filtering processing on the wheel information collected by the wheel sensor connected thereto;

[0094] The software processing unit is used to perform software filtering on the signal processed by the hardware processing unit, and to differentiate the obstructed and non-obstructed values ​​through software anti-jitter processing, and to convert the processed analog signal into a digital pulse signal for transmission to the axle counting logic processing module; wherein the above-mentioned software anti-jitter processing includes median value filtering and sliding average filtering algorithms.

[0095] Embodiment 2:

[0096] In the embodiment of the present invention, based on the axle counter interference identification system provided in Embodiment 1, a corresponding integrated rim-type wheel sensor axle counter interference identification method is provided, comprising the following steps:

[0097] S1, collecting information of wheels passing over it through a first wheel sensor SYS1 and a second wheel sensor SYS2;

[0098] S2, performing AD acquisition, filtering, differentiation and analog-to-digital conversion processing on the wheel information received by the evaluation board in sequence to obtain a corresponding digital pulse signal;

[0099] S3. Perform logic judgment processing on the obtained digital pulse signal through the axle counting logic processing module to obtain abnormal / normal pulse identification information, and identify interference for redundancy.

[0100] In step S2 of the embodiment of the present invention, the evaluation board differentiates the obstructed value and the non-obstructed value by software anti-shake processing for the wheel information it receives, and the value of the obstructed point is lower than the value of the obstructed recovery to the non-obstructed point. The processing method is specifically as follows:

[0101] Assume that the signal value of the first / second wheel sensor SYS1 / SYS2 when collecting no wheel information is X / Y;

[0102] When the signal value X / Y drops below 80%X / 80%Y, it is determined that the first / second wheel sensor SYS1 / SYS2 is blocked, and 80%X / 80%Y is used as the blocking point of the first / second wheel sensor SYS1 / SYS2;

[0103] When the signal value gradually increases from below 80%X / 80%Y to above 90%X / 90%Y, it is determined that the first / second wheel sensor SYS1 / SYS2 has recovered from obstruction to unobstructed, and 90%X / 90%Y is used as the value of the unobstructed point of the first / second wheel sensor SYS1 / SYS2.

[0104] Specifically, assuming that the signal value of the sensor SYS1 is X after normal installation, when the value of the wheel approaching X drops to 80%X, it is considered to have reached the obstruction point value. If the signal value drops below 80%X, the sensor is considered to be blocked. When the sensor signal value gradually increases from below 80%X, it is still considered to be in a blocked state when it increases to above 80%X. Only when the sensor signal value continues to increase to 90%X, the value of the non-obstructed point recovered from the obstruction and continues to increase, is it considered to have recovered from the obstruction.

[0105] Similarly, assuming that the signal value of sensor SYS2 is Y after normal installation, when the value of the wheel approaching Y drops to 80%Y, it is considered to have reached the obstruction point value. If the signal value drops below 80%Y, the sensor is considered to be blocked. When the sensor signal value gradually increases from below 80%Y, when it increases to above 80%Y, it is still considered to be in a blocked state. Only when the sensor signal value continues to rise to the value of 90%Y when the obstruction is restored to the non-obstructed point and continues to rise, is it considered to have recovered.

[0106] Step S3 of the embodiment of the present invention includes the following sub-steps:

[0107] S31, setting an abnormal pulse corresponding table;

[0108] S32, collecting and sequentially recording the widths of the pulse signals SX1, SX2, S1, and S2 according to the digital pulse relationship of the digital pulse signal SYS1" / SYS2" after analog-to-digital conversion corresponding to the blocked point of the first / second wheel sensor SYS1 / SYS2;

[0109] Wherein, when the train is running in the forward direction, SX1 is a pulse signal from the blocked point A of the first wheel sensor SYS1 to the blocked point B of the second wheel sensor SYS2; SX2 is a pulse signal from the unblocked point C of the first wheel sensor SYS1 to the unblocked point D of the second wheel sensor SYS2; S1 is a pulse signal from the blocked point A of the first wheel sensor SYS1 to the unblocked point C of the first wheel sensor SYS1; S2 is a pulse signal from the blocked point B of the second wheel sensor SYS2 to the unblocked point D of the second wheel sensor SYS2;

[0110] When the train is running in the reverse direction, SX1 is a pulse signal from the non-obstructed point A of the first wheel sensor SYS1 to the non-obstructed point B of the second wheel sensor SYS2; SX2 is a pulse signal from the obstructed point C of the first wheel sensor SYS1 to the obstructed point D of the second wheel sensor SYS2; S1 is a pulse signal from the non-obstructed point A of the first wheel sensor SYS1 to the obstructed point C of the first wheel sensor SYS1; S2 is a pulse signal from the non-obstructed point B of the second wheel sensor SYS2 to the obstructed point D of the second wheel sensor SYS2;

[0111] S33, comparing the widths of SX1, SX2, S1, and S2 to identify normal pulses and abnormal pulses;

[0112] S34. After SX1, SX2, S1, and S2 meet the pulse width requirements, normal pulses are counted according to the axle counting logic; combined with the direction, vehicle speed, and section occupancy / idle information, abnormal pulses are counted normally or identified as interference for redundancy.

[0113] In step S31 of the present embodiment, in the process of setting the abnormal pulse correspondence table, practical experience shows that the erroneous axle counting pulses caused by electrical interference on the line are usually within 5mS and will not exceed 10mS. Once the interference exceeds this range, it usually means that there is a major fault in the axle counting equipment, line grounding or cable, and the equipment must be replaced before it can work normally. The embodiment of the present invention performs interference redundancy and alarms in advance for individual interference problems after the performance of the line or cable has just degraded, or multiple interferences are superimposed and exceed the anti-interference range of the equipment, and sets the abnormal pulse correspondence table based on this.

[0114] Since the sensor is an integrated structure with symmetrical design, the absolute physical positions of the blocked starting point A of SYS1 and the blocked starting point B of SYS2 will change, but the relative physical distance between points A and B remains fixed. The absolute physical positions of point C where SYS1 is blocked and restored to unobstructed and point D where SYS2 is blocked and restored to unobstructed will change, but the relative physical distance between points C and D remains fixed.

[0115] In a specific example of the present invention, since the sensor length is about 200mm, the train wheel is usually 840mm in diameter (due to the processing of electrical interference within 10mS, the vehicle speed is faster under the pulse width of 10mS, and it is usually a standard 840mm wheel diameter train), the wheel diameter of 840mm, the effective working distance of the same sensor system is about 360mm (actual test data), and the working distances of the two systems are basically the same, the physical distance L1 between points AB is about 180mm (actual test data), and the physical distance L2 between points CD is about 180mm (actual test data) the same as the physical distance AB.

[0116] On this basis, when a high-speed train with a pulse width of no more than 10mS passes, the same wheel passing the sensor can basically be considered to pass at a uniform speed. This preset table also only processes abnormal electrical interference pulses not exceeding 10mS. The specific relationship tables are shown in Tables 1 to 3:

[0117] Table 1: Pulse width 10mS, vehicle speed 36m / S (130km / h)

[0118]

[0119] Table 2: Pulse width 5mS, vehicle speed 72m / S (260km / h)

[0120]

[0121] Table 3: Pulse width 3.6mS, vehicle speed 100m / S (360km / h)

[0122]

[0123] Thus, in step S31 of this embodiment, in the abnormal pulse correspondence table, the correspondence between the abnormal pulse type and the pulse width and ratio includes:

[0124] Type 1: S1<3.0mS, S2<3.0mS, SX1<1.5mS or SX2<1.5mS;

[0125] Type 2: only S1 or S2;

[0126] Type 3: SX1>S1;

[0127] Type 4: SX2>S2;

[0128] Type 5: The width of S1 is more than 3 times the width of SX1;

[0129] Type 6: The width of S2 is more than 3 times the width of SX2;

[0130] Type 7: The width difference between SX1 and SX2 is greater than 50%;

[0131] Type 8: The width difference between S1 and S2 is greater than 50%.

[0132] Specifically, the abnormal pulse correspondence table is shown in Table 4, where typical abnormal pulses are as follows: Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown;

[0133] Table 4: Abnormal pulse correspondence table

[0134]

[0135] In step S32 of this embodiment, the method of collecting and sequentially recording the widths of the pulse signals SX1, SX2, S1, and S2 is specifically as follows:

[0136] If the pulse signal starts from SX1, the pulse width value is recorded in the order of SX1, S1, S2, and SX2. When the pulse width is greater than or equal to 20mS, it is recorded as 20mS. When it is less than 20mS, the actual pulse width value is recorded and the record is marked as a positive axis counter mark.

[0137] If the pulse signal starts from SX2, the pulse width value is recorded in the order of SX2, S2, S1, and SX1. When the pulse width is greater than or equal to 20mS, it is recorded as 20mS. When it is less than 20mS, the actual pulse width value is recorded and the record is marked as a reverse axle counting mark.

[0138] In this embodiment, step S33 is specifically as follows:

[0139] According to the pulse width values ​​recorded by SX1, S1, S2, and SX2, they are compared with the pulse types in the abnormal pulse corresponding table (Table 4), and classified into normal pulses and abnormal pulses according to the comparison results;

[0140] Among them, in the abnormal pulse:

[0141] Type 1 abnormal pulses are directly marked as interference and are not processed further;

[0142] Abnormal pulses of type 2, type 3 and type 4 are directly marked as interference and the number of times is recorded. When the number of times reaches the preset value, the system is treated as a fault.

[0143] For abnormal pulses of type 5, type 6, type 7 and type 8, the abnormal pulses that need to be processed by axle counting are marked, and axle counting is performed first in the subsequent processing process, and they are marked as abnormal pulse axes.

[0144] In step S34 of this embodiment, the abnormal pulses identified as type 5, type 6, type 7 and type 8 are counted, and the current axis is marked as an abnormal pulse axis;

[0145] The method of combining direction, vehicle speed and section occupied / idle information to perform normal axle counting or identify interference for redundancy is:

[0146] When the section is idle, an abnormal pulse appears, and the second axis pulse does not appear within a delay of 1S, the abnormal pulse is redundant, and the redundant 1 axis identification is recorded, and an alarm message is output at the same time to notify the maintenance personnel to check the equipment;

[0147] When the section is idle, an abnormal pulse appears, and the second axis pulse appears within a delay of 1S. When the pulse width is less than 20mS, the abnormal pulse is treated as a normal pulse for axle counting. When the pulse width is equal to 20mS (if it is greater than 20mS, it is also recorded as 20mS) or the axle counting direction is different, the abnormal pulse is treated as an abnormal pulse, which does not participate in the section occupation / idle processing, and only the current axis remains in the section. When the section is idle, it is cleared after a delay of 30S, and an alarm message is output at the same time.

[0148] When the section is occupied, an abnormal pulse appears and then the current abnormal pulse appears, the section is just idle, and after a delay of 1S, the second axis pulse does not appear. When the width of the previous pulse is less than 20mS, the abnormal pulse is treated as a normal pulse for axle counting. When the width of the previous pulse is equal to 20mS (if it is greater than 20mS, it is also recorded as 20mS) or the axle counting direction is different, the abnormal pulse is treated as an abnormal pulse, which does not participate in the section occupation / idle processing, and only the current axis remains in the section. When the section is idle, it is cleared after a delay of 30S, and an alarm message is output at the same time.

[0149] When the section is occupied, when the last pulse of the axle counting is a normal pulse, and there is no second axle pulse after a delay of 1S, if there has been an abnormal pulse in this round of axle counting sequence, and the section is idle including the current abnormal pulse, the abnormal pulse will be treated as a normal pulse for axle counting; otherwise, it will be treated as an abnormal pulse, cleared after a delay of 30S, and an alarm message will be output at the same time.

[0150] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

[0151] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations that do not deviate from the essence of the present invention based on the technical revelations disclosed by the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. An integrated rim-type wheel sensor axle counter interference identification system, characterized in that: include: Sensor modules, evaluation boards, and axle counting logic processing modules; The sensor module includes a first wheel sensor SYS1 and a second wheel sensor SYS2 of an integrated structure, which are used to detect and identify the direction of the wheels passing over it to obtain wheel information; The evaluation board is connected to the first wheel sensor SYS1 and the second wheel sensor SYS2, and is used to perform signal conversion on the wheel information collected by the evaluation board to obtain corresponding digital pulse signals; The axle counting logic processing module is connected to the evaluation board and is used to perform logic discrimination processing on the received digital pulse signal, obtain abnormal / normal pulse identification information, and identify interference for redundancy.

2. The integrated rim-type wheel sensor axle counter interference identification system according to claim 1, characterized in that: The first wheel sensor SYS1 and the second wheel sensor SYS2 are symmetrically arranged and at the same height in the horizontal direction; The first wheel sensor SYS1 and the second wheel sensor SYS2 have the same operating frequency and receiving sensitivity, and the blocked action distances of the first wheel sensor SYS1 and the second wheel sensor SYS2 when the same wheel passes over them are completely consistent.

3. The integrated rim-type wheel sensor axle counter interference identification system according to claim 1, characterized in that: The first evaluation board and the second evaluation board have the same structure and both include: The hardware processing unit is used to perform AD acquisition and high-frequency filtering processing on the wheel information collected by the wheel sensor connected thereto; The software processing unit is used to perform software filtering on the signal processed by the hardware processing unit, and to differentiate the obstructed and non-obstructed values ​​through software anti-jitter processing, and to convert the processed analog signal into a digital pulse signal for transmission to the axle counting logic processing module; wherein the software anti-jitter processing includes median value filtering and sliding average filtering algorithms.

4. A method for identifying axle counter interference of an integrated rim type wheel sensor, implemented based on the integrated rim type wheel sensor axle counter interference identification system according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, collecting information of wheels passing over it through a first wheel sensor SYS1 and a second wheel sensor SYS2; S2, performing AD acquisition, filtering, differentiation and analog-to-digital conversion processing on the wheel information received by the evaluation board in sequence to obtain a corresponding digital pulse signal; S3. Perform logic judgment processing on the obtained digital pulse signal through the axle counting logic processing module to obtain abnormal / normal pulse identification information, and identify interference for redundancy.

5. The integrated rim-type wheel sensor axle counter interference identification method according to claim 4, characterized in that: In step S2, the evaluation board differentiates the obstructed value and the non-obstructed value by software anti-shake processing for the wheel information it receives, and the value of the obstructed point is lower than the value of the obstructed recovery to the non-obstructed point. The specific processing method is: Assume that the signal value of the first / second wheel sensor SYS1 / SYS2 when collecting no wheel information is X / Y; When the signal value X / Y drops below 80%X / 80%Y, it is determined that the first / second wheel sensor SYS1 / SYS2 is blocked, and 80%X / 80%Y is used as the blocking point of the first / second wheel sensor SYS1 / SYS2; When the signal value gradually increases from below 80%X / 80%Y to above 90%X / 90%Y, it is determined that the first / second wheel sensor SYS1 / SYS2 has recovered from obstruction to unobstructed, and 90%X / 90%Y is used as the value of the unobstructed point of the first / second wheel sensor SYS1 / SYS2.

6. The method for identifying axle counter interference of an integrated rim-type wheel sensor according to claim 4, characterized in that: The step S3 comprises the following sub-steps: S31, setting an abnormal pulse corresponding table; S32, collecting and sequentially recording the widths of the pulse signals SX1, SX2, S1, and S2 according to the digital pulse relationship of the digital pulse signal SYS1" / SYS2" after analog-to-digital conversion corresponding to the blocked point of the first / second wheel sensor SYS1 / SYS2; Wherein, when the train is running in the forward direction, SX1 is a pulse signal from the blocked point A of the first wheel sensor SYS1 to the blocked point B of the second wheel sensor SYS2; SX2 is a pulse signal from the unblocked point C of the first wheel sensor SYS1 to the unblocked point D of the second wheel sensor SYS2; S1 is a pulse signal from the blocked point A of the first wheel sensor SYS1 to the unblocked point C of the first wheel sensor SYS1; S2 is a pulse signal from the blocked point B of the second wheel sensor SYS2 to the unblocked point D of the second wheel sensor SYS2; When the train is running in the reverse direction, SX1 is a pulse signal from the non-obstructed point A of the first wheel sensor SYS1 to the non-obstructed point B of the second wheel sensor SYS2; SX2 is a pulse signal from the obstructed point C of the first wheel sensor SYS1 to the obstructed point D of the second wheel sensor SYS2; S1 is a pulse signal from the non-obstructed point A of the first wheel sensor SYS1 to the obstructed point C of the first wheel sensor SYS1; S2 is a pulse signal from the non-obstructed point B of the second wheel sensor SYS2 to the obstructed point D of the second wheel sensor SYS2; S33, comparing the widths of SX1, SX2, S1, and S2 to identify normal pulses and abnormal pulses; S34. After SX1, SX2, S1, and S2 meet the pulse width requirements, normal pulses are counted according to the axle counting logic; combined with the direction, vehicle speed, and section occupancy / idle information, abnormal pulses are counted normally or identified as interference for redundancy.

7. The integrated rim-type wheel sensor axle counter interference identification method according to claim 6, characterized in that: In the step S31, in the abnormal pulse correspondence table, the correspondence between the abnormal pulse type and the pulse width and ratio includes: Type 1: S1<3.0mS, S2<3.0mS, SX1<1.5mS or SX2<1.5mS; Type 2: only S1 or S2; Type 3: SX1>S1; Type 4: SX2>S2; Type 5: The width of S1 is more than 3 times the width of SX1; Type 6: The width of S2 is more than 3 times the width of SX2; Type 7: The width difference between SX1 and SX2 is greater than 50%; Type 8: The width difference between S1 and S2 is greater than 50%.

8. The integrated rim-type wheel sensor axle counter interference identification method according to claim 7, characterized in that: In step S32, the method of collecting and sequentially recording the widths of the pulse signals SX1, SX2, S1, and S2 is specifically as follows: If the pulse signal starts from SX1, the pulse width value is recorded in the order of SX1, S1, S2, and SX2. When the pulse width is greater than or equal to 20mS, it is recorded as 20mS. When it is less than 20mS, the actual pulse width value is recorded and the record is marked as a positive axis counter mark. If the pulse signal starts from SX2, the pulse width value is recorded in the order of SX2, S2, S1, and SX1. When the pulse width is greater than or equal to 20mS, it is recorded as 20mS. When it is less than 20mS, the actual pulse width value is recorded and the record is marked as a reverse axle counting mark.

9. The method for identifying axle counter interference of an integrated rim-type wheel sensor according to claim 8, characterized in that: The step S33 is specifically as follows: According to the pulse width values ​​recorded by SX1, S1, S2, and SX2, they are compared with the pulse types in the abnormal pulse corresponding table, and classified into normal pulses and abnormal pulses according to the comparison results; Among them, in the abnormal pulse: Type 1 abnormal pulses are directly marked as interference and are not processed further; Abnormal pulses of type 2, type 3 and type 4 are directly marked as interference and the number of times is recorded. When the number of times reaches the preset value, the system is treated as a fault. For abnormal pulses of type 5, type 6, type 7 and type 8, the abnormal pulses that require axle counting processing are marked.

10. The integrated rim-type wheel sensor axle counter interference identification method according to claim 9, characterized in that: In the step S34, the abnormal pulses identified as type 5, type 6, type 7 and type 8 are counted, and the current axis is marked as an abnormal pulse axis; The method of combining direction, vehicle speed and section occupied / idle information to perform normal axle counting or identify interference for redundancy is: When the section is idle, an abnormal pulse appears, and the second axis pulse does not appear within a delay of 1S, the abnormal pulse is redundant, and the redundant 1 axis identification is recorded, and an alarm message is output at the same time to notify the maintenance personnel to check the equipment; When the section is idle, an abnormal pulse appears, and the second axis pulse appears within a delay of 1S. When the pulse width is less than 20mS, the abnormal pulse is treated as a normal pulse for axle counting. When the pulse width is equal to 20mS or the counting direction is different, the abnormal pulse is treated as an abnormal pulse and does not participate in the section occupation / idle processing. Only the current axis remains in the section. When the section is idle, it is cleared after a delay of 30S and an alarm message is output at the same time. When the section is occupied, an abnormal pulse appears and then the current abnormal pulse appears, the section is just idle, and after a delay of 1S, the second axis pulse does not appear. When the width of the previous pulse is less than 20mS, the abnormal pulse is treated as a normal pulse for axle counting; When the previous pulse width is equal to 20mS or the counting direction is different, the abnormal pulse is treated as an abnormal pulse, which does not participate in the section occupation / idle processing, and only the current axis remains in the section. When the section is idle, it is cleared after a delay of 30S, and an alarm message is output at the same time; When the section is occupied, when the last pulse of the axle counting is a normal pulse, and after a delay of 1S, there is no second axle pulse, if there has been an abnormal pulse in the current axle counting sequence, and the section is idle including the current abnormal pulse, the abnormal pulse will be treated as a normal pulse for axle counting; Otherwise, it will be treated as an abnormal pulse, cleared after a delay of 30 seconds, and an alarm message will be output at the same time.

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