Rail axle counting device and rail axle counting method

Abstract

The invention discloses a track axle counting device and a track axle counting method. The system comprises an electromagnetic axle counting module and an axle counting host unit, the electromagnetic axle counting module comprises an electromagnetic axle counting sensor unit and a fiber grating sensor unit; the fiber bragg grating sensor unit is used for generating a synchronously changing wavelength signal due to the change of rail stress when a train wheel passes through an axle counting point and inputting the wavelength signal into the axle counting host unit; and the axle counting host unit is used for determining whether the electromagnetic axle counting sensing unit is in an interference error axle counting state or not according to the electromagnetic axle counting current information and the wavelength signal and determining the actual axle number of the axle counting point. According to the technical scheme, whether the electromagnetic axle counting sensor unit is interfered or not is determined according to the electromagnetic axle counting current information of the electromagnetic axle counting sensor unit and the wavelength signal of the fiber grating sensor unit, then the axle counting number is judged, the situation that the electromagnetic axle counting sensor unit counts axles mistakenly due to metal foreign matter or electromagnetic interference is eliminated, and the axle counting accuracy is improved. And the safety and the stability of a train operation system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tracks, and in particular, to a track axle counting device and a track axle counting method. Background Art

[0002] After years of development, the electromagnetic axle counting technology has become mature and widely used. However, the problem of electromagnetic interference still exists. When a ferromagnetic metal touches the axle counting magnetic head, it is very easy to mis-count the axle, and even when an iron object touches the axle counting magnetic head, a fault alarm is very likely to occur, resulting in the need for manual confirmation and resetting of the occupied state of the inspection section, causing a waste of a large amount of manpower and material resources. Summary of the Invention

[0003] The present invention provides a track axle counting device and a track axle counting method to solve the problems of easy interference and inaccurate axle counting existing in the prior art electromagnetic axle counting technology.

[0004] According to one aspect of the present invention, a track axle counting device is provided, which includes:

[0005] An electromagnetic axle counting module and an axle counting host unit;

[0006] The electromagnetic axle counting module includes an electromagnetic axle counting sensor unit and a fiber Bragg grating sensor unit;

[0007] The electromagnetic axle counting sensor unit and the fiber Bragg grating sensor unit are respectively connected to the axle counting host unit and are both arranged at the axle counting point of the track;

[0008] The electromagnetic axle counting sensor unit is used to generate an alternating magnetic field and generate electromagnetic axle counting current information according to the alternating magnetic field and input it into the axle counting host unit;

[0009] The fiber Bragg grating sensor unit is used to generate a wavelength signal that synchronously changes due to the change of the track stress when the train wheel passes through the axle counting point and input it into the axle counting host unit;

[0010] The axle counting host unit is used to determine whether the electromagnetic axle counting sensing unit is in an interference mis-counting state according to the electromagnetic axle counting current information and the wavelength signal, and determine the actual number of axles at the axle counting point when there is no interference mis-counting state.

[0011] Optionally, the electromagnetic axle counting sensor unit includes a clamp block, a transmitting coil and a receiving coil; the transmitting coil and the receiving coil are both arranged in the clamp block, and the clamp block is fixedly arranged on the web of the rail;

[0012] The receiving coil is connected to the axle counting host unit;

[0013] The transmitting coil is used to generate an alternating magnetic field, and the receiving coil is used to generate electromagnetic axle counting current information according to the alternating magnetic field;

[0014] The axle counter host unit is used to determine the number of axles based on the change in the electromagnetic axle counting current information.

[0015] Optionally, the fiber Bragg grating sensor unit includes a first fiber Bragg grating sensor;

[0016] The first fiber Bragg grating sensor is arranged in the clamp block at the bottom of the rail and is connected to the axle counter host unit, and is used to output a first wavelength signal to the axle counter host unit.

[0017] Optionally, the fiber Bragg grating sensor unit further includes a second fiber Bragg grating sensor;

[0018] The second fiber Bragg grating sensor is arranged in the clamp block at the bottom of the rail and is arranged parallel to the first fiber Bragg grating sensor along the track extension direction;

[0019] The second fiber Bragg grating sensor is connected to the axle counter host unit and is used to output a second wavelength signal to the axle counter host unit;

[0020] The axle counter host unit is used to determine that a train has passed and increase the number of axles at the axle counting point when the central wavelength of the first wavelength signal is greater than the wavelength change threshold and the central wavelength of the second wavelength signal is greater than the wavelength change threshold.

[0021] Optionally, the track axle counting device further includes an optical signal demodulation unit;

[0022] The optical signal demodulation unit is respectively connected to the fiber Bragg grating sensor unit and the axle counter host unit, and is used to convert the wavelength signal from an optical signal into an electrical signal and input it into the axle counter host unit.

[0023] Optionally, the track axle counting device further includes an alarm unit;

[0024] The alarm unit is communicatively connected to the axle counter host unit and is used to output a prompt message when it is determined that the electromagnetic axle counting sensor unit is in an interference mis-axle counting state. Optionally, the track axle counting device further includes a cable and an optical cable;

[0025] The electromagnetic axle counting sensor unit and the axle counter host unit are connected by a cable; the fiber Bragg grating sensor unit and the axle counter host unit are connected by an optical cable.

[0026] According to another aspect of the present invention, there is provided a track axle counting method, which is applied to a track axle counting device; the track axle counting method includes:

[0027] Receiving electromagnetic axle counting current information and wavelength signals;

[0028] Determine whether the axle counting sensor unit of the electromagnetic axle counter is in an interference mis-counting state based on the electromagnetic axle current information and the wavelength signal, and determine the actual number of axles at the axle counting point when there is no interference mis-counting state. Optionally, determining whether the axle counting sensor unit of the electromagnetic axle counter is in an interference mis-counting state based on the electromagnetic axle current information and the wavelength signal includes:

[0029] Determine the number of axles counted based on the change in the alternating current in the electromagnetic axle current information;

[0030] Judge whether the central wavelength of the wavelength signal is greater than the wavelength change threshold;

[0031] When the number of axles counted increases and the central wavelength is less than or equal to the wavelength change threshold, the electromagnetic axle sensor unit is in an interference mis-counting state.

[0032] Optionally, determining whether the axle counting sensor unit of the electromagnetic axle counter is in an interference mis-counting state based on the electromagnetic axle current information and the wavelength signal, and determining the actual number of axles at the axle counting point when there is no interference mis-counting state includes:

[0033] Determine the number of axles counted based on the change in the alternating current in the electromagnetic axle current information;

[0034] Judge whether the central wavelength of the wavelength signal is greater than the wavelength change threshold;

[0035] When the number of axles counted increases and the central wavelength is greater than the wavelength change threshold, the electromagnetic axle sensor unit is not in an interference mis-counting state;

[0036] Determine the actual number of axles at the axle counting point based on the alternating current and the wavelength signal.

[0037] In the technical solution of the present invention, by simultaneously arranging an electromagnetic axle counting sensor unit and a fiber Bragg grating sensor unit in the track axle counting device, according to the electromagnetic axle current information of the electromagnetic axle counting sensor unit and the wavelength signal of the fiber Bragg grating sensor unit, it is determined whether the electromagnetic axle counting sensor unit is interfered, and then the number of axles counted is accurately determined, eliminating the situation of mis-counting of the electromagnetic axle counting sensor unit due to interference, and improving the safety and stability of the train operation system.

[0038] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Description of the Drawings

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0040] Figure 1 is a schematic diagram of the arrangement of an axle counting device for a track according to an embodiment of the present invention;

[0041] Figure 2 is a schematic diagram of the connection of an axle counting device for a track according to an embodiment of the present invention;

[0042] Figure 3 is a schematic diagram of the arrangement of an electromagnetic axle counting sensor unit according to an embodiment of the present invention;

[0043] Figure 4 is a schematic diagram of the arrangement of a fiber Bragg grating sensor unit according to an embodiment of the present invention;

[0044] Figure 5 is a flowchart of a first axle counting method for a track according to an embodiment of the present invention;

[0045] Figure 6 is a flowchart of a second axle counting method for a track according to an embodiment of the present invention;

[0046] Figure 7 is a flowchart of a third axle counting method for a track according to an embodiment of the present invention. Detailed implementation manners

[0047] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order different from those illustrated or described herein.

[0049] Figure 1It is a schematic diagram of the setting of an axle counting device for a track according to an embodiment of the present invention. Figure 2 It is a schematic connection diagram of an axle counting device for a track according to an embodiment of the present invention. Combining Figure 1 and Figure 2 As shown, the axle counting device for the track includes: an electromagnetic axle counting module and an axle counting host unit 3;

[0050] The electromagnetic axle counting module includes an electromagnetic axle counting sensor unit 1 and a fiber Bragg grating sensor unit 2;

[0051] The electromagnetic axle counting sensor unit 1 and the fiber Bragg grating sensor unit 2 are respectively connected to the axle counting host unit 3 and are both arranged at the axle counting point of the track;

[0052] The electromagnetic axle counting sensor unit 1 is used to generate an alternating magnetic field and generate electromagnetic axle counting current information according to the alternating magnetic field and input it into the axle counting host unit 3;

[0053] The fiber Bragg grating sensor unit 2 is used to generate a wavelength signal that changes synchronously due to the change of the track stress when the train wheel passes through the axle counting point and input it into the axle counting host unit 3; the axle counting host unit 3 is used to determine whether the electromagnetic axle counting sensor unit 1 is in an interference mis-axle counting state according to the electromagnetic axle counting current information and the wavelength signal and determine the actual number of axles at the axle counting point when there is no interference mis-axle counting state.

[0054] Among them, the electromagnetic axle counting sensor unit 1 can be an axle counting sensor designed based on the principle of electromagnetic induction. The electromagnetic axle counting sensor unit 1 is arranged on the track. The electromagnetic axle counting sensor unit 1 can generate an alternating magnetic field and generate electromagnetic axle counting current information according to the alternating magnetic field. When the train passes through the setting position of the electromagnetic axle counting sensor unit 1, the alternating magnetic field changes, and further the electromagnetic axle counting current information changes. The axle counting host unit 3 can determine the number of axles passing through the electromagnetic axle counting sensor unit 1 accordingly. However, in the actual application process, the electromagnetic axle counting sensor unit 1 is vulnerable to electromagnetic interference, such as the interference of the high-voltage power supply frame beside the track, the power-on and power-off of the pantograph, the uneven return current, and metal foreign objects, which reduces the operation stability of the track system and the accuracy of the electromagnetic axle counting sensor unit 1. Therefore, the fiber Bragg grating sensor unit 2 is added in the embodiment of the present invention.

[0055] Among them, the fiber Bragg grating sensor unit 2 can be a device designed based on a fiber Bragg grating strain sensor. The fiber Bragg grating sensor unit 2 is also arranged on the track. The fiber Bragg grating sensor unit 2 continuously inputs wavelength signals to the axle counter host unit 3. When a train passes through the position where the fiber Bragg grating sensor unit 2 is arranged, the micro-strain of the track will cause the grating pitch of the fiber Bragg grating to elongate, and the period and refractive index of the fiber Bragg grating will change, thereby causing the central wavelength to change. The axle counter host unit 3 can judge whether a train has passed according to whether the central wavelength of the wavelength signal becomes larger. When the central wavelength becomes larger, it can be judged that a train has passed.

[0056] It can be understood that in the embodiment of the present invention, the electromagnetic axle counter sensor unit 1 and the fiber Bragg grating sensor unit 2 are combined to improve the problem that only the electromagnetic axle counter sensor unit 1 has weak anti-interference ability. Whether the electromagnetic axle counter sensor unit 1 is in an interference state can be judged through the electromagnetic axle counter sensor unit 1 and the fiber Bragg grating sensor unit 2.

[0057] Specifically, when the electromagnetic axle counter current information changes and the central wavelength in the wavelength signal becomes larger, it indicates that a train has passed and the electromagnetic axle counter sensor unit 1 is working normally without being interfered. When the electromagnetic axle counter current information changes and the central wavelength in the wavelength signal remains basically unchanged, it indicates that the electromagnetic axle counter sensor unit 1 is affected by an interfering alternating magnetic field and changes. At this time, the axle counter host unit 3 can prompt the operator to check and eliminate the interference situation.

[0058] It can be understood that the embodiment of the present invention is an improvement based on the fact that the electromagnetic axle counter sensor unit 1 arranged on the track is vulnerable to interference. By further adding the fiber Bragg grating sensor unit 2, not only can the number of axles be accurately determined, but also whether there is interference in the electromagnetic axle counter sensor unit 1 can be judged. If only the fiber Bragg grating sensor unit 2 is arranged, the optical fiber is also easily affected by factors such as the environment and temperature. When the electromagnetic axle counter sensor unit 1 and the fiber Bragg grating sensor unit 2 are both arranged in the track axle counter device, the axle counting is more accurate and stable, and the reliability of the train operation system is improved.

[0059] The technical solution of the embodiment of the present invention, by arranging the electromagnetic axle counter sensor unit and the fiber Bragg grating sensor unit in the track axle counter device at the same time, determines whether the electromagnetic axle counter sensor unit is interfered according to the AC signal of the electromagnetic axle counter sensor unit and the wavelength signal of the fiber Bragg grating sensor unit, and then accurately determines the number of axles, eliminating the situation of mis-counting the axles due to interference of the electromagnetic axle counter sensor unit, and improving the safety and stability of the train operation system.

[0060] Optionally, the electromagnetic axle counter sensor unit 1 includes a clamping block 11, a transmitting coil and a receiving coil; the transmitting coil and the receiving coil are both arranged in the clamping block 11, and the clamping block 11 is fixedly arranged on the rail web 41;

[0061] The receiving coil is connected to the axle counting main unit 3;

[0062] The transmitting coil is used to generate an alternating magnetic field, and the receiving coil is used to generate electromagnetic axle counting current information according to the alternating magnetic field;

[0063] The axle counting main unit 3 is used to determine the number of axles according to the change of the alternating current.

[0064] Wherein, both the transmitting coil and the receiving coil are arranged in the clamping block 11, and by fixing the clamping block 11 on the rail web 41, the transmitting coil and the receiving coil are also fixed on the rail web 41.

[0065] Wherein, the receiving coil is connected to the axle counting main unit 3, an alternating current can be passed through the transmitting coil to generate an alternating magnetic field, the receiving coil generates electromagnetic axle counting current information according to the alternating magnetic field. When no train passes by, the alternating magnetic field basically does not change. When a train passes by, the electromagnetic axle counting current information changes, and then the axle counting main unit 3 can determine the number of axles.

[0066] In some embodiments, Figure 3 is a schematic diagram of the setting of an electromagnetic axle counting sensor unit provided according to an embodiment of the present invention. Combining Figure 1 , Figure 2 and Figure 3 shown, an electromagnetic axle counting sensor unit 1 can be set at the first position A, and an electromagnetic axle counting sensor unit 1 can be set at the second position B. The area between the first position A and the second position B can be regarded as a monitoring section. For each wheel of the train entering the monitoring section (the first position A), one axle is added, and for each wheel leaving the monitoring section (the second position B), one axle is also added. If the number of axles at point A is equal to the number of axles at point B, it means that the number of entering wheels (axles) in the monitoring section is equal to the number of leaving wheels, indicating that the train has completely left the section, and the section is in a cleared state. Otherwise, it means that there are still some bogies of the vehicle in the section, and the section is in an occupied state.

[0067] The technical solution of the embodiment of the present invention, by arranging a clamping block, a transmitting coil and a receiving coil in the electromagnetic axle counting sensor unit, and judging the number of axles by transmitting the electromagnetic axle counting current information from the receiving coil to the axle counting main unit, ensures the normal operation of the track axle counting device.

[0068] Optionally, Figure 4 is a schematic diagram of the setting of an optical fiber grating sensor unit provided according to an embodiment of the present invention. Combining Figure 1 , Figure 2 and Figure 4 shown, the optical fiber grating sensor unit 2 includes a first optical fiber grating sensor FBG1;

[0069] The first fiber Bragg grating sensor FBG1 is arranged in the clamp block at the bottom of the rail 42 and is connected to the axle counter host unit 3, and is used to output a first wavelength signal to the axle counter host unit 3.

[0070] Among them, since the micro-strain at the bottom of the rail 42 is the largest when the train passes through the track, the first fiber Bragg grating sensor FBG1 is arranged on the bottom of the rail 42 to detect the micro-strain of the bottom of the rail 42 when the train wheel passes, and then convert the micro-strain of the bottom of the rail 42 into a first wavelength signal, so as to ensure the accuracy of judgment when the train passes.

[0071] In some embodiments, the fiber Bragg grating sensor unit 2 further includes a second fiber Bragg grating sensor FBG2;

[0072] The second fiber Bragg grating sensor FBG2 is arranged in the clamp block at the bottom of the rail 42 and is arranged parallel to the first fiber Bragg grating sensor FBG1 along the track extension direction;

[0073] The second fiber Bragg grating sensor FBG2 is connected to the axle counter host unit 3 and is used to output a second wavelength signal to the axle counter host unit 3;

[0074] The axle counter host unit 3 is used to judge that a train passes and increase the number of axles of the axle counting point when the central wavelength of the first wavelength signal is greater than the wavelength change threshold and the central wavelength of the second wavelength signal is greater than the wavelength change threshold.

[0075] Among them, the purpose of arranging the second fiber Bragg grating sensor FBG2 parallel to the first fiber Bragg grating sensor FBG1 along the track extension direction can be to ensure the simultaneity of the micro-stress received, so that the first wavelength signal and the second wavelength signal received by the axle counter host unit 3 are time-synchronized.

[0076] Among them, when the central wavelength of the first wavelength signal is greater than the wavelength change threshold and the central wavelength of the second wavelength signal is greater than the wavelength change threshold, it is judged that a train passes and the number of axles of the axle counting point is incremented by one, and the purpose is to ensure the accuracy of judging the passing of the train.

[0077] In the technical solution of the embodiment of the present invention, by arranging the first fiber Bragg grating sensor FBG1 and the second fiber Bragg grating sensor FBG2 in the fiber Bragg grating sensor unit 2 and the first fiber Bragg grating sensor FBG1 and the second fiber Bragg grating sensor FBG2 are arranged in parallel, when the central wavelength of the first wavelength signal is greater than the wavelength change threshold and the central wavelength of the second wavelength signal is greater than the wavelength change threshold, the axle counter host unit 3 judges that a train passes, which ensures the accuracy of the judgment result and improves the accuracy of the track axle counting device.

[0078] Optionally, continue to refer to Figure 2 As shown, the track axle counting device further includes an optical signal demodulation unit 5;

[0079] The optical signal demodulation unit 5 is respectively connected to the fiber grating sensor unit 2 and the axle counter host unit 3, and is used to convert the wavelength signal from an optical signal into an electrical signal and input it into the axle counter host unit 3.

[0080] Among them, the optical signal demodulation unit 5 can be used to demodulate the wavelength signal from an optical signal into an electrical signal and input it into the axle counter host unit 3, which is convenient for the axle counter host unit 3 to perform calculation processing.

[0081] Specifically, the optical signal demodulation unit 5 is respectively connected to the fiber grating sensor unit 2 and the axle counter host unit 3. The fiber grating sensor unit 2 continuously transmits the wavelength signal to the optical signal demodulation unit 5. After wavelength demodulation, it is continuously transmitted to the axle counter host unit 3. The axle counter host unit 3 combines the AC signal for processing and calculation, ensuring the normal operation of the track axle counter device.

[0082] Optionally, continue to refer to Figure 2 As shown, the track axle counter device further includes an alarm unit 6;

[0083] The alarm unit 6 is communicatively connected to the axle counter host unit 3 and is used to output a prompt message when it is determined that the electromagnetic axle counter sensor unit 1 is in an interference state.

[0084] Among them, the alarm unit 6 can output a prompt message in the form of an indicator light, voice broadcast, sending a signal to a mobile terminal, etc. to prompt the operator.

[0085] Specifically, the alarm unit 6 is communicatively connected to the axle counter host unit 3. When the axle counter host unit 3 determines that the electromagnetic axle counter sensor unit 1 is in an interference state according to the electromagnetic axle counter current information and the wavelength signal, the axle counter host unit 3 can input an interference signal to the alarm unit 6, and the alarm unit 6 outputs a prompt message to prompt the operator to check the interference source of the electromagnetic axle counter sensor unit 1.

[0086] The technical solution of the embodiment of the present invention, by setting an alarm unit, outputs a prompt message when it is determined that the electromagnetic axle counter sensor unit is in an interference state, so as to prompt the operator to check the interference source of the electromagnetic axle counter sensor unit, forming a detection feedback mechanism, which helps to accurately detect and eliminate interference and ensure the normal operation of the train.

[0087] Optionally, continue to refer to Figure 2 As shown, the track axle counter device further includes a cable 7 and an optical cable 8;

[0088] The electromagnetic axle counter sensor unit 1 and the axle counter host unit 3 are connected by a cable 7; the fiber grating sensor unit 2 and the axle counter host unit 3 are connected by an optical cable 8.

[0089] Among them, since the signal transmitted in the electromagnetic axle counter sensor unit 1 is an electrical signal and the signal transmitted in the axle counter host unit 3 is an optical signal, the cable 7 and the optical cable 8 are provided.

[0090] Specifically, the electromechanical axle counting sensor unit 1 and the axle counting host unit 3 are connected by a cable 7 to ensure the normal transmission of AC signals; the fiber Bragg grating sensor unit 2 and the axle counting host unit 3 are connected by an optical cable 8 to ensure the normal transmission of wavelength signals.

[0091] In some embodiments, when the track axle counting device includes an optical signal demodulation unit 5, the optical cable 8 needs to be arranged between the fiber Bragg grating sensor unit 2 and the optical signal demodulation module to ensure the normal operation of the track axle counting device.

[0092] Based on the same inventive concept, Figure 5 is a flowchart of the first track axle counting method provided by an embodiment of the present invention. Combining Figure 1 、 Figure 2 and Figure 5 as shown, an embodiment of the present invention also provides a track axle counting method, which is applied to a track axle counting device; the track axle counting method includes:

[0093] S10. Receive electromechanical axle counting current information and wavelength signals.

[0094] Among them, the electromechanical axle counting sensor unit 1 is arranged on the track. The electromechanical axle counting sensor unit 1 can generate an alternating magnetic field and generate electromechanical axle counting current information according to the alternating magnetic field. By connecting with the electromechanical axle counting sensor unit 1, the electromechanical axle counting current information can be received in real time.

[0095] Among them, the fiber Bragg grating sensor unit 2 is connected to the axle counting host unit 3 and continuously inputs wavelength signals to the axle counting host unit 3.

[0096] S11. Determine whether the electromechanical axle counting sensing unit is in an interference mis-axle counting state according to the electromechanical axle counting current information and the wavelength signals, and determine the actual number of axles at the axle counting point when there is no interference mis-axle counting state.

[0097] Among them, when the train passes through the installation position of the electromagnetic axle counting sensor unit 1, the alternating magnetic field changes, which further causes the electromagnetic axle counting current information to change. The axle counting host unit 3 can determine the number of axles passing through the electromagnetic axle counting sensor unit 1 based on this. When the train passes through the installation position of the fiber Bragg grating sensor unit 2, the micro-strain of the track will cause the grating pitch of the fiber Bragg grating to elongate, and the period and refractive index of the fiber Bragg grating will change, which further causes the central wavelength to change. The axle counting host unit 3 can determine whether a train has passed according to whether the central wavelength of the wavelength signal becomes larger. In the actual application process, the electromagnetic axle counting sensor unit 1 is vulnerable to electromagnetic interference. By combining the electromagnetic axle counting sensor unit 1 and the fiber Bragg grating sensor unit 2, it can be determined whether there is a real train passing when the electromagnetic axle counting sensor unit 1 detects a change in the number of axles, and further determine whether there is interference in the electromagnetic axle counting sensor unit 1.

[0098] Specifically, when the electromagnetic axle counting current information changes and the central wavelength in the wavelength signal becomes larger, it indicates that a train has passed and the electromagnetic axle counting sensor unit 1 is working properly without being interfered. When the electromagnetic axle counting current information changes and the central wavelength in the wavelength signal remains basically unchanged, it indicates that the electromagnetic axle counting sensor unit 1 is interfered and the alternating magnetic field changes. At this time, the axle counting host unit 3 can prompt the operator to check and eliminate the interference situation.

[0099] The technical solution of the embodiment of the present invention, by receiving the AC signal of the electromagnetic axle counting sensor unit and the wavelength signal of the fiber Bragg grating sensor unit in real time, determines whether there is interference in the electromagnetic axle counting sensor unit according to the AC signal of the electromagnetic axle counting sensor unit and the wavelength signal of the fiber Bragg grating sensor unit, and then accurately determines the number of axles, eliminating the situation of mis-counting the axles due to interference of the electromagnetic axle counting sensor unit, and improving the safety and stability of the train operation system.

[0100] On the basis of the above embodiment, Figure 6 is the flowchart of the second track axle counting method provided by the embodiment of the present invention. As shown in Figure 1 、 Figure 2 and Figure 6 shown, the track axle counting method includes:

[0101] S20. Receive the electromagnetic axle counting current information and the wavelength signal.

[0102] S21. Determine the number of axles according to the change of the alternating current in the electromagnetic axle counting current information.

[0103] Among them, when the train passes through the installation position of the electromagnetic axle counting sensor unit 1, the alternating magnetic field changes, which further causes the electromagnetic axle counting current information to change. Based on this, the axle counting host unit 3 determines that a train has passed and the number of axles is incremented by one.

[0104] S22. Determine whether the central wavelength of the wavelength signal is greater than the wavelength change threshold.

[0105] Among them, when the train passes through the installation position of the fiber Bragg grating sensor unit 2, the track micro-strain will cause the grating pitch of the fiber Bragg grating to elongate, and the period and refractive index of the fiber Bragg grating will change, thereby causing the central wavelength to change. When the counting axle host unit 3 determines that the central wavelength of the wavelength signal is greater than the wavelength change threshold, it is determined that there is a train passing; when the counting axle host unit 3 determines that the central wavelength of the wavelength signal is less than or equal to the wavelength change threshold, there is no train passing.

[0106] S23. When the counting axle number increases and the central wavelength is less than or equal to the wavelength change threshold, the electromagnetic counting axle sensor unit is in an interference mis-counting axle state.

[0107] Among them, when the counting axle number is not zero and the actual wavelength change is less than or equal to the wavelength change threshold, it indicates that at this time, the electromagnetic counting axle sensor unit 1 detects that there is a train passing by, but the fiber Bragg grating sensor unit 2 does not detect the train passing by. At this time, it is determined that the electromagnetic counting axle sensor unit 1 generates a change in the AC signal due to electromagnetic interference. Therefore, the electromagnetic counting axle sensor unit 1 is in an interference state.

[0108] The technical solution of the embodiment of the present invention determines the counting axle number according to the change of the alternating current, determines whether the central wavelength is greater than the wavelength change threshold according to the wavelength signal, and when the counting axle number is not zero and the central wavelength is less than or equal to the wavelength change threshold, determines that the electromagnetic counting axle sensor unit is in an interference state, eliminating the situation of mis-counting the axle due to interference of the electromagnetic counting axle sensor unit, and improving the safety and stability of the train operation system.

[0109] On the basis of the above embodiment, Figure 7 is the flowchart of the third track counting axle method provided by the embodiment of the present invention. Combining Figure 1 、 Figure 2 and Figure 7 shown, the track counting axle method includes:

[0110] S30. Receive the electromagnetic counting axle current information and the wavelength signal.

[0111] S31. Determine the counting axle number according to the change of the alternating current in the electromagnetic counting axle current information.

[0112] Among them, when the train passes through the installation position of the electromagnetic counting axle sensor unit 1, the alternating magnetic field changes, thereby causing the electromagnetic counting axle current information to change. Accordingly, the counting axle host unit 3 determines that there is a train passing by and the counting axle number is incremented by one.

[0113] S32. According to whether the central wavelength of the wavelength signal is greater than the wavelength change threshold.

[0114] Among them, when the train passes through the installation position of the fiber grating sensor unit 2, the micro-strain of the track will cause the grating pitch of the fiber grating to elongate, and the period and refractive index of the fiber grating will change, thereby causing the central wavelength to change. When the counting axle host unit 3 determines that the central wavelength of the wavelength signal is greater than the wavelength change threshold, it is determined that a train has passed; when the counting axle host unit 3 determines that the central wavelength of the wavelength signal is less than or equal to the wavelength change threshold, no train has passed.

[0115] S33. When the number of counted axles increases and the central wavelength is greater than the wavelength change threshold, the electromagnetic counting axle sensor unit is not in an interference mis-counting axle state.

[0116] S34. Determine the actual number of axles at the counting axle point according to the alternating current and the wavelength signal.

[0117] Among them, when the number of counted axles is not zero and the actual wavelength change is greater than the wavelength change threshold, it indicates that at this time, the electromagnetic counting axle sensor unit 1 detects that a train has passed and the fiber grating sensor unit 2 also detects that the train has passed. At this time, it is judged that the electromagnetic counting axle sensor unit 1 is not affected by electromagnetic interference and the alternating current signal changes normally. Therefore, the electromagnetic counting axle sensor unit 1 is in a non-interference state.

[0118] The technical solution of the embodiment of the present invention determines the number of counted axles according to the change of the alternating current, determines whether the central wavelength is greater than the wavelength change threshold according to the wavelength signal, and when the number of counted axles is not zero and the central wavelength is greater than the wavelength change threshold, it is judged that the electromagnetic counting axle sensor unit is in a non-interference state, excluding the situation of mis-counting axles of the electromagnetic counting axle sensor unit, and has higher accuracy in counting axles of the train operation system, improving the safety and stability of the train operation system.

[0119] It should be understood that the various forms of the flow shown above can be used, steps can be reordered, added or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, which is not limited herein.

[0120] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A track axle counting device, characterized in that: include: Electromagnetic axle counter module and axle counter host unit; The electromagnetic axle counter module includes an electromagnetic axle counter sensor unit and a fiber grating sensor unit; The electromagnetic axle counting sensor unit and the fiber grating sensor unit are respectively connected to the axle counting host unit and are both arranged at the axle counting point of the track; The electromagnetic axle counter sensor unit is used to generate an alternating magnetic field and generate electromagnetic axle counter current information according to the alternating magnetic field and input it into the axle counter host unit; The fiber grating sensor unit is used to generate a synchronously changing wavelength signal due to the change of the track stress when the train wheel passes through the axle counting point and input it into the axle counting host unit; The axle counting host unit is used to determine whether the electromagnetic axle counting sensor unit is in an interference miscounting state according to the electromagnetic axle counting current information and the wavelength signal, and to determine the actual number of axles at the axle counting point when there is no interference miscounting state.

2. The track axle counting device according to claim 1, characterized in that: The electromagnetic axle counter sensor unit comprises a clamping block, a transmitting coil and a receiving coil; the transmitting coil and the receiving coil are both arranged in the clamping block, and the clamping block is fixedly arranged on the rail waist; The receiving coil is connected to the axle counting host unit; The transmitting coil is used to generate the alternating magnetic field, and the receiving coil is used to generate the electromagnetic meter shaft current information according to the alternating magnetic field; The axle counting host unit is used to determine the number of axle counting axes according to the change of the electromagnetic axle counting current information.

3. The track axle counting device according to claim 1, characterized in that: The fiber Bragg grating sensor unit comprises a first fiber Bragg grating sensor; The first fiber grating sensor is arranged in a clamping block at the bottom of the rail and connected to the axle counting host unit, and is used to output a first wavelength signal to the axle counting host unit.

4. The track axle counting device according to claim 3, characterized in that: The fiber Bragg grating sensor unit further includes a second fiber Bragg grating sensor; The second fiber grating sensor is arranged in a clamping block at the bottom of the rail and is arranged parallel to the first fiber grating sensor along the extension direction of the rail; The second fiber grating sensor is connected to the axle counting host unit and is used to output a second wavelength signal to the axle counting host unit; The axle counting host unit is used to determine that a train has passed and increase the number of axles at the axle counting point when the central wavelength of the first wavelength signal is greater than a wavelength change threshold and the central wavelength of the second wavelength signal is greater than the wavelength change threshold.

5. The track axle counting device according to claim 1, characterized in that: The track axle counting device also includes an optical signal demodulation unit; The optical signal demodulation unit is connected to the fiber grating sensor unit and the axle counting host unit respectively, and is used to convert the wavelength signal from an optical signal into an electrical signal and input it into the axle counting host unit.

6. The track axle counting device according to claim 1, characterized in that: The track axle counting device further comprises an alarm unit; The alarm unit is in communication connection with the axle counting host unit, and is used for outputting prompt information when it is determined that the electromagnetic axle counting sensor unit is in an interference miscounting state.

7. The track axle counting device according to claim 1, characterized in that: The track axle counting device also includes an electrical cable and an optical cable; The electromagnetic axle counter sensor unit and the axle counter host unit are connected via the cable; the fiber grating sensor unit and the axle counter host unit are connected via the optical cable.

8. A track axle counting method, characterized in that: Applicable to the track axle counting device according to any one of claims 1 to 7; The track axle counting method comprises: Receive electromagnetic meter shaft current information and wavelength signal; According to the electromagnetic axle counter current information and the wavelength signal, it is determined whether the electromagnetic axle counter sensing unit is in an interference miscounting state, and the actual number of axes at the axle counter point is determined when there is no interference miscounting state.

9. The track axle counting method according to claim 8, characterized in that: Determining whether the electromagnetic axle counter sensing unit is in an interference miscounting state according to the electromagnetic axle counter current information and the wavelength signal includes: Determine the number of axle counters according to the change of the alternating current in the electromagnetic axle counter current information; Determining whether the central wavelength of the wavelength signal is greater than a wavelength change threshold; When the number of axle counters increases and the central wavelength is less than or equal to the wavelength change threshold, the electromagnetic axle counter sensor unit is in an interference miscounting state.

10. The track axle counting method according to claim 8, characterized in that: Determining whether the electromagnetic axle counter sensing unit is in an interference miscounting state according to the electromagnetic axle counter current information and the wavelength signal and determining the actual number of axles at the axle counter point when there is no interference miscounting state, including: Determine the number of axle counters according to the change of the alternating current in the electromagnetic axle counter current information; Determining whether the central wavelength of the wavelength signal is greater than a wavelength change threshold; When the number of axle counters increases and the central wavelength is greater than the wavelength change threshold, the electromagnetic axle counter sensor unit is not in an interference miscounting state; The actual number of axes at the axis counting point is determined according to the alternating current and the wavelength signal.

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