Method, device and axle counting device for detecting electromagnetic interference

Abstract

The present invention discloses a method, device and axle counter for detecting electromagnetic interference, which relates to the technical field of trackside equipment, and solves the problem in the prior art that an axle counter is subject to electromagnetic interference and an adjacent track section may be occupied. The present invention adds an interference detection module to the axle counter cabinet, compares the waveforms of adjacent axle counter voltage data, and correctly determines whether the axle counter has a wheel passing by rather than being subject to electromagnetic interference, thereby solving the problem that the axle counter is easily affected by electromagnetic interference in the AC traction environment of urban (suburban) railways.

Description

Technical Field

[0001] The present invention relates to the technical field of trackside equipment, and in particular to a method and device for detecting electromagnetic interference and an axle counting device. Background Art

[0002] The signal system is the core system to ensure the safety and efficiency of rail transit line operation. The axle counter is a key trackside device of the signal system, which is used to detect the idle / occupied status of the track section to ensure driving safety. There are two rails in rail transit. When the train passes, the wheels run on both rails at the same time, but the axle counter is only arranged on one rail, and the area between the two axle counters is called the track section. In the AC traction environment of urban (suburban) railways, the axle counter is prone to electromagnetic interference. When there is harmonic interference in the traction power supply, the impact current interference when the train is over-powered and split, the impact current interference when the train passes the turnout, and the impact current interference when the train raises the pantograph, the axle counter will be subject to electromagnetic interference. Once an axle counter is subject to electromagnetic interference, the adjacent track section may be occupied. According to the principle of fault-oriented safety, the axle counter system will give a signal that the track section is occupied, thereby affecting the normal operation of the line and reducing the line's operating service quality. Therefore, it is necessary to propose a method, device and axle counter for detecting electromagnetic interference to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies of the prior art and provide a method, device and axle counting device for detecting electromagnetic interference to solve the problem in the prior art that when one axle counter is subject to electromagnetic interference, the adjacent track section may be occupied.

[0004] In a first aspect, the present invention provides a method for detecting electromagnetic interference, comprising:

[0005] Obtaining shaft counting voltage data of a first shaft counting magnetic head, a second shaft counting magnetic head, ... an Nth shaft counting magnetic head, where N is a positive integer;

[0006] Analyze and process the axle counting voltage data of each axle counting magnetic head to detect whether a train wheel passes through each axle counting magnetic head;

[0007] When a train wheel passes by the Nth axle counting magnetic head, determining whether a voltage fluctuation occurs in the waveform of the axle counting voltage data of the N+1th axle counting magnetic head adjacent to the Nth axle counting magnetic head at the same time;

[0008] If the waveform of the axle counter voltage data of the N+1th axle counter magnetic head adjacent to the Nth axle counter magnetic head does not experience voltage fluctuation at the same time, it is determined that a train wheel has passed by the Nth axle counter magnetic head;

[0009] If the waveform of the axle counter voltage data of the N+1th axle counter magnetic head adjacent to the Nth axle counter magnetic head undergoes voltage fluctuation at the same time, it is determined that the Nth axle counter magnetic head is subject to electromagnetic interference.

[0010] Furthermore, after determining that the Nth axle counting magnetic head is subject to electromagnetic interference, the method further includes:

[0011] Shield the axle counter voltage data collected by the Nth axle counter magnetic head.

[0012] In a second aspect, the present invention provides a device for detecting electromagnetic interference, comprising:

[0013] An acquisition unit, used for acquiring axle counting voltage data of a first axle counting magnetic head, a second axle counting magnetic head, ... an Nth axle counting magnetic head, where N is a positive integer;

[0014] An analysis unit, used for analyzing and processing the axle counting voltage data of each axle counting magnetic head, and detecting whether a train wheel passes through each axle counting magnetic head;

[0015] A judging unit is used to judge whether a voltage fluctuation occurs in the waveform of the axle counter voltage data of the N+1th axle counter magnetic head adjacent to the Nth axle counter magnetic head at the same time when a train wheel passes by the Nth axle counter magnetic head;

[0016] A determination unit, configured to determine that a train wheel has passed through the Nth axle counting magnetic head when the waveform of the axle counting voltage data of the N+1th axle counting magnetic head adjacent to the Nth axle counting magnetic head does not experience voltage fluctuation at the same time;

[0017] The determination unit is further configured to determine that the Nth axle counting magnetic head is subject to electromagnetic interference when a voltage fluctuation occurs in the waveform of the axle counting voltage data of the N+1th axle counting magnetic head adjacent to the Nth axle counting magnetic head at the same time.

[0018] Further, after determining that the Nth axle counting magnetic head is subject to electromagnetic interference, the device further comprises:

[0019] The shielding unit is used to shield the axle counting voltage data collected by the Nth axle counting magnetic head after determining that the Nth axle counting magnetic head is subject to electromagnetic interference.

[0020] In a third aspect, the present invention further provides an axle counting device, comprising: a first axle counting magnetic head, a second axle counting magnetic head, ... an Nth axle counting magnetic head, N being a positive integer, and a plurality of axle counting boxes, a branching cabinet, an axle counting cabinet and a signal control cabinet; the first axle counting magnetic head, the second axle counting magnetic head, ... the Nth axle counting magnetic head are independent axle counting magnetic heads arranged in the same rail;

[0021] The first axle counting magnetic head, the second axle counting magnetic head, ... the Nth axle counting magnetic head are respectively connected to an axle counting box, the axle counting box is connected to the branching cabinet, the branching cabinet is connected to the axle counting cabinet, and the axle counting cabinet is connected to the signal control cabinet;

[0022] The axle counting cabinet includes an interference detection module, which is used to obtain the axle counting voltage data of the first axle counting head, the second axle counting head, ... the Nth axle counting head, where N is a positive integer; analyze and process the axle counting voltage data of each axle counting head to detect whether a train wheel passes through each axle counting head; when a train wheel passes through the Nth axle counting head, determine whether the waveform of the axle counting voltage data of the N+1th axle counting head adjacent to the Nth axle counting head at the same time has a voltage fluctuation; when the waveform of the axle counting voltage data of the N+1th axle counting head adjacent to the Nth axle counting head at the same time does not have a voltage fluctuation, determine that a train wheel passes through the Nth axle counting head; when the waveform of the axle counting voltage data of the N+1th axle counting head adjacent to the Nth axle counting head at the same time has a voltage fluctuation, determine that the Nth axle counting head is subject to electromagnetic interference.

[0023] Furthermore, the interference detection module is further used to determine that the Nth axle counting magnetic head is subject to electromagnetic interference when a voltage fluctuation occurs in the waveform of the axle counting voltage data of the N+1th axle counting magnetic head adjacent to the Nth axle counting magnetic head at the same time.

[0024] The present invention has the following beneficial effects: a method, device and axle counting device for detecting electromagnetic interference provided by the present invention obtains axle counting voltage data of a first axle counting magnetic head, a second axle counting magnetic head, ... an Nth axle counting magnetic head, where N is a positive integer; analyzes and processes the axle counting voltage data of each axle counting magnetic head to detect whether a train wheel passes through each axle counting magnetic head; when a train wheel passes through the Nth axle counting magnetic head, determines whether a voltage fluctuation occurs in the waveform of the axle counting voltage data of the N+1th axle counting magnetic head adjacent to the Nth axle counting magnetic head at the same time; if no voltage fluctuation occurs in the waveform of the axle counting voltage data of the N+1th axle counting magnetic head adjacent to the Nth axle counting magnetic head at the same time, determines that a train wheel passes through the Nth axle counting magnetic head; if a voltage fluctuation occurs in the waveform of the axle counting voltage data of the N+1th axle counting magnetic head adjacent to the Nth axle counting magnetic head at the same time, determines that the Nth axle counting magnetic head is subject to electromagnetic interference. The method of the present invention is relatively simple, does not change the architecture of the original axle counting device, only extracts the voltage data of adjacent axle counters, and uniformly processes and determines them in the axle counting cabinet. By detecting the voltage data waveform of adjacent axle counters, it is determined whether the axle counter of the "wheel passing" is subject to electromagnetic interference, thereby improving the anti-interference ability of the axle counter equipment in the AC traction environment of urban (suburban) railways, thereby improving the reliability of the signal system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only 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.

[0026] Figure 1 is a flow chart of a method for detecting electromagnetic interference of the present invention;

[0027] Figure 2 It is a schematic diagram of shaft voltage data;

[0028] Figure 3 It is a schematic diagram of the electromagnetic interference resistant axle counting device of the present invention. DETAILED DESCRIPTION

[0029] See also Figure 1 , an embodiment of the present invention provides a method for detecting electromagnetic interference, comprising:

[0030] S101, obtaining axle counting voltage data of a first axle counting magnetic head, a second axle counting magnetic head, ... an Nth axle counting magnetic head, where N is a positive integer.

[0031] Specifically, the axle counting head refers to the axle counting head installed on the rail, wherein the first axle counting head, the second axle counting head, ... the Nth axle counting head are independent axle counting heads arranged in the same rail, and each axle counting head collects its own voltage data and sends it to the indoor part through its own axle counting box.

[0032] S102, analyzing and processing the axle counting voltage data of each axle counting magnetic head, and detecting whether a train wheel passes through each axle counting magnetic head.

[0033] Specifically, the processing and analysis results of each axle counter do not affect each other, and the processing processes are relatively independent.

[0034] S103, when a train wheel passes by the Nth axle counting magnetic head, it is determined whether a voltage fluctuation occurs in the waveform of the axle counting voltage data of the N+1th axle counting magnetic head adjacent to the Nth axle counting magnetic head at the same time.

[0035] S104, if the waveform of the axle counter voltage data of the N+1th axle counter magnetic head adjacent to the Nth axle counter magnetic head does not experience voltage fluctuation at the same time, it is determined that a train wheel has passed by the Nth axle counter magnetic head.

[0036] S105, if the waveform of the axle counter voltage data of the N+1th axle counter magnetic head adjacent to the Nth axle counter magnetic head undergoes voltage fluctuation at the same time, it is determined that the Nth axle counter magnetic head is subject to electromagnetic interference.

[0037] In this embodiment, after determining that the Nth axle counting magnetic head is subject to electromagnetic interference, the method further includes: S106, shielding the axle counting voltage data collected by the Nth axle counting magnetic head.

[0038] Figure 2 The voltage data waveforms of the axle counter in various situations are shown. Figure (1) shows the waveform of the axle counter voltage when no wheel passes through the axle counter and there is no electromagnetic interference in the rails. At this time, the axle counter voltage continues to remain in a constant low voltage state.

[0039] Figure 2 Figure (2) shows the change in voltage data when a train vehicle passes through the axle counter. The waveform shows that the voltage starts to rise after a certain time point and maintains a high voltage signal for a period of time. When the wheel completely passes the axle counter, the axle counter voltage begins to drop. When the axle counter voltage exceeds the set threshold and there is an increase in voltage and a decrease in voltage, the axle counter device will determine that the wheel has passed the axle counter.

[0040] Figure 2 Figure (3) shows the waveform of the axle counter voltage data when electromagnetic interference occurs in the AC traction environment of the urban (suburban) railway. This waveform also has rising voltage and falling voltage, but because the electromagnetic interference generally exists for a short time, the waveform of the axle counter voltage data appears as a pulse signal, and the high voltage lasts for a very short time. However, if the axle counter is close to the point where the electromagnetic interference occurs, the axle counter voltage will also exceed the set threshold, and there will also be rising voltage and falling voltage, so the axle counter equipment will misjudge that the wheel has passed the axle counter. This waveform is prone to misjudgment in a general axle counter cabinet, and the problem to be solved by this invention is to filter out this type of axle counter voltage waveform.

[0041] Figure 2 The fourth figure shows the voltage waveform of the axle counter which is far away from the electromagnetic interference occurrence point. When the axle counter is far away from the electromagnetic interference occurrence point, the maximum value of the impulse voltage will not exceed the set threshold value. However, since the axle counter is relatively sensitive, the occurrence of the impulse voltage can still be captured in the axle counter voltage data. The method of the present invention uses the voltage waveform of the fourth figure generated by the adjacent axle counter to filter the axle counter judgment result of the voltage waveform of the third figure.

[0042] When the train wheels do not pass through the axle counting equipment and no electromagnetic interference occurs, the voltage waveforms of all axle counting equipment are displayed as Figure 2 Figure (1) in Figure 2: When the train wheels pass a certain axle counter, the voltage waveform of the axle counter should be displayed as follows: Figure 2 In Figure (2), the adjacent shaft voltage waveform is still displayed as Figure 2 Figure (1) in the figure; when electromagnetic interference occurs in the environment, the axle counters closer to the interference point may Figure 2The waveform shown in Figure (3) of the figure, and the axle counters adjacent to the axle counter that are farther away from the interference point will appear Figure 2 The present invention adds an interference detection module to the axle counter cabinet, determines whether the axle counter is affected by electromagnetic interference based on the display of the waveform, and filters out the axle counter results caused by electromagnetic interference, thereby further improving the reliability of the axle counter equipment and signal system.

[0043] At present, general axle counting equipment is unable to distinguish electromagnetic interference such as harmonic interference generated by traction power supply in AC traction environment, impact current interference when train over-powers and splits phases, impact current interference when train passes switch and impact current of train raising pantograph. As a result, the axle counting equipment is affected by electromagnetic interference and makes wrong judgment, causing the signal system to mistakenly believe that the train is occupied, thus causing signal system failure and affecting the overall operation of the signal system.

[0044] The present invention determines whether the axle counter device that generates wheel count statistics is affected by electromagnetic interference by comparing and analyzing the voltage waveform data of adjacent axle counters. The judgment principle is as follows: when electromagnetic interference is generated at a certain position of the line, the adjacent axle counter device beside the track will also receive electromagnetic interference information. The axle counter device farther away from the interference point is less affected. When an axle counter device makes a judgment that a wheel has passed, the interference detection module will check the voltage collected by other axle counters adjacent to the axle counter. When the voltage collected by the adjacent axle counter does not change at all, it is judged that a vehicle has passed; when the voltage of the adjacent axle counter also fluctuates at the same time, the interference detection module will judge that the axle counter is affected by electromagnetic interference and correct the judgment of the axle counter.

[0045] Based on the above-mentioned method for detecting electromagnetic interference, an embodiment of the present invention provides a device for detecting electromagnetic interference, including:

[0046] An acquisition unit, used for acquiring axle counting voltage data of a first axle counting magnetic head, a second axle counting magnetic head, ... an Nth axle counting magnetic head, where N is a positive integer;

[0047] An analysis unit, used for analyzing and processing the axle counting voltage data of each axle counting magnetic head, and detecting whether a train wheel passes through each axle counting magnetic head;

[0048] A judging unit is used to judge whether a voltage fluctuation occurs in the waveform of the axle counter voltage data of the N+1th axle counter magnetic head adjacent to the Nth axle counter magnetic head at the same time when a train wheel passes by the Nth axle counter magnetic head;

[0049] A determination unit, configured to determine that a train wheel has passed through the Nth axle counting magnetic head when the waveform of the axle counting voltage data of the N+1th axle counting magnetic head adjacent to the Nth axle counting magnetic head does not experience voltage fluctuation at the same time;

[0050] The determination unit is further configured to determine that the Nth axle counting magnetic head is subject to electromagnetic interference when a voltage fluctuation occurs in the waveform of the axle counting voltage data of the N+1th axle counting magnetic head adjacent to the Nth axle counting magnetic head at the same time.

[0051] In this embodiment, after determining that the Nth axle counting magnetic head is subject to electromagnetic interference, the device further includes:

[0052] The shielding unit is used to shield the axle counting voltage data collected by the Nth axle counting magnetic head after determining that the Nth axle counting magnetic head is subject to electromagnetic interference.

[0053] See also Figure 3 An embodiment of the present invention provides an axle counting device, comprising: a first axle counting magnetic head 1, a second axle counting magnetic head 2, ... an Nth axle counting magnetic head N, N being a positive integer, and a plurality of axle counting boxes 3, a branching cabinet 4, an axle counting cabinet 5 and a signal control cabinet 6; the first axle counting magnetic head 1, the second axle counting magnetic head 2, ... an Nth axle counting magnetic head N are independent axle counting magnetic heads arranged in the same rail; the first axle counting magnetic head 1, the second axle counting magnetic head 2, ... an Nth axle counting magnetic head N are respectively connected to an axle counting box 3, the axle counting box 3 is connected to the branching cabinet 4, the branching cabinet 4 is connected to the axle counting cabinet 5, and the axle counting cabinet 5 is connected to the signal control cabinet 6.

[0054] The axle counting device is a key signal system device used to detect the idle / occupied status of the track section and ensure the safety of train driving. It includes an axle counting magnetic head installed on the trackside, an axle counting box, and an axle counting cabinet installed in the indoor part. The axle counting magnetic head transmits the collected data to the distribution cabinet in the indoor part through the axle counting box, enters the indoor part, and then enters the axle counting cabinet. The axle counting cabinet transmits the result of the axle counting processing to the signal control cabinet. Under normal circumstances, when the train wheel passes through the trackside axle counting magnetic head, the voltage collected by the axle counting will continue to rise for a period of time, and the axle counting waveform will be a continuous high voltage signal. When the voltage collected by the axle counting exceeds the set threshold, it will be judged that the train has passed the axle counting. In the AC traction environment of the urban (suburban) railway, the axle counting is susceptible to electromagnetic interference. When electromagnetic interference occurs, the axle counting will collect an instantaneous impulse voltage. Although the impulse voltage lasts for a short time, it will also exceed the voltage threshold set by the axle counting, which meets the condition that the wheel passes the axle counting. Therefore, general axle counting equipment cannot distinguish the difference between the wheel passing and electromagnetic interference. When the voltage collected by the axle counter exceeds the threshold, the axle counter will count the wheels, and the track section where the axle counter is located will show the occupied status, affecting the reliability of the signal system and the operation of the train.

[0055] In urban rail transit, the axle counter magnetic heads of the trackside are all arranged on the same rail. When electromagnetic interference occurs at a certain position of the line, the axle counter equipment near the interference point is greatly affected by the electromagnetic interference and may misjudge the passing of wheels; while the adjacent axle counter equipment farther away from the interference point is less affected, but the impulse voltage generated by the electromagnetic interference can still be collected, but the voltage will not exceed the voltage threshold of the axle counter. This method determines whether the axle counter voltage exceeding the voltage threshold is affected by electromagnetic interference by judging the collected impulse voltage of the adjacent axle counter.

[0056] The axle counter box is a cable box installed beside the track, one end of which is connected to the axle counter magnetic head, and the other end is introduced into the indoor part through the distribution cabinet to reach the axle counter cabinet.

[0057] The branching cabinet is a transfer cabinet for the signal system to introduce all outdoor equipment into the indoor cabinet through outdoor cables. The axle counter is connected to the branching cabinet through the outdoor cable, and the branching cabinet is connected to the axle counter cabinet through the indoor cable.

[0058] The signal control cabinet refers to the core control unit in the signal system, which combines the axle counting device information with other device information to complete the core control of the operational safety and efficiency of the signal system.

[0059] The axle counter cabinet is the core processing unit of the axle counter equipment. It is responsible for receiving the voltage data of the axle counter magnetic head and judging and analyzing the voltage data. When the axle counter voltage data meets the conditions for the train wheels to pass, the axle counter cabinet will count the number of wheels and send the statistical results to the signal system, namely the signal control cabinet. After confirming that the wheels have passed, the signal system will set the section to a train occupied state.

[0060] The axle counting cabinet 5 includes an interference detection module 51, which is used to obtain the axle counting voltage data of the first axle counting head, the second axle counting head, ... the Nth axle counting head, where N is a positive integer; analyze and process the axle counting voltage data of each axle counting head to detect whether a train wheel passes through each axle counting head; when a train wheel passes through the Nth axle counting head, determine whether the waveform of the axle counting voltage data of the N+1th axle counting head adjacent to the Nth axle counting head at the same time has a voltage fluctuation; when the waveform of the axle counting voltage data of the N+1th axle counting head adjacent to the Nth axle counting head at the same time does not have a voltage fluctuation, determine that a train wheel passes through the Nth axle counting head; when the waveform of the axle counting voltage data of the N+1th axle counting head adjacent to the Nth axle counting head at the same time has a voltage fluctuation, determine that the Nth axle counting head is subject to electromagnetic interference.

[0061] The interference detection module 51 is further used to determine that the Nth axle counter magnetic head is subject to electromagnetic interference when a voltage fluctuation occurs in the waveform of the axle counter voltage data of the N+1th axle counter magnetic head adjacent to the Nth axle counter magnetic head at the same time.

[0062] The interference detection module added to the axle counter cabinet is a method of the present invention that can determine whether it is subject to electromagnetic interference compared to the general axle counter cabinet. This module is responsible for collecting the voltage data of each axle counter. The working principle of this method is as follows: when a certain axle counter determines that a train wheel has passed, the interference detection module will detect the voltage data of the adjacent axle counter at the same time, and determine whether the axle counter is affected by electromagnetic interference based on the voltage data waveform of the adjacent axle counter. If the voltage of the adjacent axle counter does not change at all, it is determined that a vehicle has passed; when the voltage of the adjacent axle counter also fluctuates at the same time, the interference detection module will determine that the axle counter is affected by electromagnetic interference, and at the same time will shield the result of the axle counter input.

[0063] The present invention adds an interference detection module to the axle counter cabinet to collect waveform data of adjacent axle counters, judge whether the axle counter equipment is subject to electromagnetic interference, and then provide the correct track section occupancy information to the signal system, thereby reducing the influence of electromagnetic interference on the axle counter and improving the reliability of the signal system.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for detecting electromagnetic interference, characterized in that: include: Obtaining shaft counting voltage data of a first shaft counting magnetic head, a second shaft counting magnetic head, ... an Nth shaft counting magnetic head, where N is a positive integer; Analyze and process the axle counting voltage data of each axle counting magnetic head to detect whether a train wheel passes through each axle counting magnetic head; When a train wheel passes by the Nth axle counting magnetic head, determining whether a voltage fluctuation occurs in the waveform of the axle counting voltage data of the N+1th axle counting magnetic head adjacent to the Nth axle counting magnetic head at the same time; If the waveform of the axle counter voltage data of the N+1th axle counter magnetic head adjacent to the Nth axle counter magnetic head does not experience voltage fluctuation at the same time, it is determined that a train wheel has passed by the Nth axle counter magnetic head; If the waveform of the axle counter voltage data of the N+1th axle counter magnetic head adjacent to the Nth axle counter magnetic head fluctuates in voltage at the same time, it is determined that the Nth axle counter magnetic head is subject to electromagnetic interference; After determining that the Nth axle counting magnetic head is subject to electromagnetic interference, the method further includes: Shield the axle counter voltage data collected by the Nth axle counter magnetic head.

2. A device for detecting electromagnetic interference, characterized in that: include: An acquisition unit, used for acquiring axle counting voltage data of a first axle counting magnetic head, a second axle counting magnetic head, ... an Nth axle counting magnetic head, where N is a positive integer; An analysis unit, used for analyzing and processing the axle counting voltage data of each axle counting magnetic head, and detecting whether a train wheel passes through each axle counting magnetic head; A judging unit is used to judge whether a voltage fluctuation occurs in the waveform of the axle counter voltage data of the N+1th axle counter magnetic head adjacent to the Nth axle counter magnetic head at the same time when a train wheel passes by the Nth axle counter magnetic head; A determination unit, configured to determine that a train wheel has passed through the Nth axle counting magnetic head when the waveform of the axle counting voltage data of the N+1th axle counting magnetic head adjacent to the Nth axle counting magnetic head does not experience voltage fluctuation at the same time; The determination unit is further configured to determine that the Nth axle counter magnetic head is subject to electromagnetic interference when a voltage fluctuation occurs in the waveform of the axle counter voltage data of the N+1th axle counter magnetic head adjacent to the Nth axle counter magnetic head at the same time; After determining that the Nth axle counting magnetic head is subject to electromagnetic interference, the device further comprises: The shielding unit is used to shield the axle counting voltage data collected by the Nth axle counting magnetic head after determining that the Nth axle counting magnetic head is subject to electromagnetic interference.

3. An axle counting device, characterized in that: include: A first axle counting magnetic head (1), a second axle counting magnetic head (2), ... an Nth axle counting magnetic head (N), N being a positive integer, and a plurality of axle counting boxes (3), a branching cabinet (4), an axle counting cabinet (5) and a signal control cabinet (6); the first axle counting magnetic head (1), the second axle counting magnetic head (2), ... an Nth axle counting magnetic head (N) are independent axle counting magnetic heads arranged in the same rail; The first axle counting magnetic head (1), the second axle counting magnetic head (2), ... the Nth axle counting magnetic head (N) are each individually connected to an axle counting box (3), the axle counting box (3) is connected to the branching cabinet (4), the branching cabinet (4) is connected to the axle counting cabinet (5), and the axle counting cabinet (5) is connected to the signal control cabinet (6); The axle counting cabinet (5) comprises an interference detection module (51) for obtaining axle counting voltage data of a first axle counting magnetic head, a second axle counting magnetic head, ... an Nth axle counting magnetic head, where N is a positive integer; analyzing and processing the axle counting voltage data of each axle counting magnetic head to detect whether a train wheel passes through each axle counting magnetic head; When a train wheel passes through the Nth axle counting head, determine whether the waveform of the axle counting voltage data of the N+1th axle counting head adjacent to the Nth axle counting head at the same time has voltage fluctuation; when no voltage fluctuation occurs in the waveform of the axle counting voltage data of the N+1th axle counting head adjacent to the Nth axle counting head at the same time, determine that a train wheel passes through the Nth axle counting head; when voltage fluctuation occurs in the waveform of the axle counting voltage data of the N+1th axle counting head adjacent to the Nth axle counting head at the same time, determine that the Nth axle counting head is subject to electromagnetic interference.

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