Signal acquisition and processing equipment and track signal detection system

Abstract

The utility model relates to a signal acquisition and processing device and a track signal detection system, the signal acquisition and processing device comprises a coil interface, the signal acquisition end of the coil interface is used for being connected with the signal output end of a maintenance interface of a locomotive signal host; the signal acquisition module is connected with the signal acquisition end, and the signal acquisition module is used for carrying out analog-to-digital conversion processing on the track signals output by the signal acquisition end; the signal processing module is connected with the signal acquisition module, and the signal processing module is used for decoding the track signals output by the signal acquisition module; the data storage module is connected with the signal processing module, and the data storage module is used for storing the track signals output by the signal processing module. The signal collecting and processing equipment solves the problem that in the prior art, the quality condition of a track signal collected by a ground sending end is difficult to accurately reflect the quality condition of a track signal received by a vehicle-mounted receiving end.

Description

Technical Field

[0001] This application relates to the field of track signal detection technology, and in particular to a signal acquisition and processing device and a track signal detection system. Background Technology

[0002] Track circuits are an indispensable part of modern railways. They consist of a ground transmitter, railway tracks, and an onboard receiver (locomotive signal host). The ground transmitter is used to send track signals, the railway tracks act as conductors to transmit these signals, and the locomotive signal host is used to receive track signals and determine the occupancy or vacancy status of the railway tracks based on these signals. Track signals provide crucial information for locomotive operation control, effectively ensuring train safety and operational efficiency.

[0003] Currently, track signals are typically collected at ground-based transmitters to enable operators to analyze track signal quality. However, because track signals are transmitted on railway tracks and are affected by numerous factors such as the track surface, geographical conditions, locomotives, and weather, the quality of track signals collected at ground-based transmitters is difficult to accurately reflect the quality of track signals received at the onboard receiver (i.e., the locomotive signal host). Utility Model Content

[0004] This application provides a signal acquisition and processing device and a track signal detection system to solve the problem in the prior art that the quality of track signals acquired at the ground transmitting end is difficult to accurately reflect the quality of track signals received at the vehicle-mounted receiving end.

[0005] In a first aspect, this application provides a signal acquisition and processing device, comprising: a coil interface, wherein the signal acquisition end of the coil interface is used to connect to the signal output end of the maintenance interface of a locomotive signal host; a signal acquisition module, wherein the signal acquisition module is connected to the signal acquisition end and is used to perform analog-to-digital conversion processing on the track signal output by the signal acquisition end; a signal processing module, wherein the signal processing module is connected to the signal acquisition module and is used to decode the track signal output by the signal acquisition module; and a data storage module, wherein the data storage module is connected to the signal processing module and is used to store the track signal output by the signal processing module.

[0006] Optionally, the data storage module includes: a recording control chip connected to the signal processing module; the signal acquisition and processing device further includes: an antenna and a wireless communication module, wherein the radio frequency signal interface of the wireless communication module is connected to the antenna, the SPI output of the wireless communication module is connected to the SPI input of the recording control chip, and the SPI input of the wireless communication module is connected to the SPI output of the recording control chip; a CAN interface and a CAN communication module, wherein the differential signal interface of the CAN communication module is connected to the CAN interface, the CAN output of the CAN communication module is connected to the CAN input of the recording control chip, and the CAN input of the CAN communication module is connected to the CAN output of the recording control chip.

[0007] Optionally, the signal acquisition module includes: a first ADC chip and a second ADC chip, wherein the analog input terminals of the first ADC chip and the second ADC chip are both connected to the signal acquisition terminal of the coil interface; the signal processing module includes: a first DSP chip and a second DSP chip, wherein the digital audio input terminal of the first DSP chip is connected to the digital output terminal of the first ADC chip, the digital audio input terminal of the second DSP chip is connected to the digital output terminal of the second ADC chip, the first UART output terminal of the first DSP chip is connected to the UART input terminal of the second DSP chip, the first UART output terminal of the second DSP chip is connected to the UART input terminal of the first DSP chip, and the second UART output terminals of the first DSP chip and the second UART output terminals of the second DSP chip are both connected to the first UART input terminal of the recording control chip.

[0008] Optionally, the signal acquisition module further includes an isolation module, the input terminal of which is connected to the signal acquisition terminal of the coil interface, and the output terminal of which is connected to the analog input terminal of the first ADC chip and the analog input terminal of the second ADC chip.

[0009] Optionally, the power output terminal of the locomotive signal host is connected to the power input terminal of the coil interface. The power input terminals of the wireless communication module, the CAN communication module, the first ADC chip, the second ADC chip, the first DSP chip, the second DSP chip, the first power input terminal of the recording control chip, and the isolation module are all connected to a common node. The signal acquisition and processing device further includes a power button, the first end of which is connected to the power input terminal of the coil interface, and the second end of which is connected to the common node.

[0010] Optionally, the data storage module includes: a TF card; the SDIO input terminal of the TF card is connected to the SDIO output terminal of the recording control chip, and the SDIO output terminal of the TF card is connected to the SDIO input terminal of the recording control chip; a USB interface circuit, the USB input terminal of the USB interface circuit is connected to the USB output terminal of the recording control chip, and the USB output terminal of the USB interface circuit is connected to the USB input terminal of the recording control chip; a backup power supply, the power output terminal of the backup power supply is connected to the second power input terminal of the recording control chip; a clock chip, wherein the clock signal output terminal of the clock chip is connected to the clock signal input terminal of the recording control chip, and the signal acquisition and processing device further includes: a USB interface, the USB interface being connected to the differential signal interface of the USB interface circuit.

[0011] Optionally, the signal acquisition and processing device further includes: a 485 communication module, wherein the UART output terminal of the 485 communication module is connected to the second UART input terminal of the recording control chip, and the UART input terminal of the 485 communication module is connected to the UART output terminal of the recording control chip; and a COM interface, wherein the COM interface is connected to the differential signal interface of the 485 communication module.

[0012] Optionally, the signal acquisition and processing device further includes: a network indicator light, the first end of which is connected to the first I / O terminal of the recording control chip, the second end of which is grounded, and the network indicator light is used to indicate the transmission status of the antenna.

[0013] Optionally, the signal acquisition and processing device further includes: a running indicator light, the first end of which is connected to the second IO terminal of the recording control chip, the second end of which is grounded, and the running indicator light is used to indicate the operating status of the signal acquisition and processing device.

[0014] Secondly, this application provides a track signal detection system, the track signal detection system comprising: any of the signal acquisition and processing devices described above; a CAN-to-USB module, the CAN interface of the CAN-to-USB module being used to connect to the CAN interface of the signal acquisition and processing device; a display device, the USB interface of the display device being used to connect to the USB interface of the CAN-to-USB module, and the antenna of the display device being used to connect to the antenna of the signal acquisition and processing device.

[0015] In this embodiment, the signal acquisition module is responsible for acquiring track signals from the maintenance interface of the locomotive signal host through the coil interface and performing analog-to-digital conversion on the acquired track signals. The signal processing module is responsible for decoding the track signals, and the data storage module is responsible for storing the track signals. Compared with the prior art of acquiring track signals at the ground transmitting end for track signal quality analysis, this application directly obtains track signals from the maintenance interface of the locomotive signal host for track signal quality analysis, thereby solving the problem that the quality of track signals acquired at the ground transmitting end in the prior art is difficult to accurately reflect the quality of track signals received by the on-board receiver. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is a schematic diagram of the structure of a first signal acquisition and processing device provided in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the structure of a second signal acquisition and processing device provided in the embodiments of this application;

[0021] Figure 3 This is a schematic diagram of the structure of a third signal acquisition and processing device provided in the embodiments of this application;

[0022] Figure 4 This is a schematic diagram of the structure of the fourth signal acquisition and processing device provided in the embodiments of this application;

[0023] Figure 5 This is a schematic diagram of the structure of the fifth signal acquisition and processing device provided in the embodiments of this application;

[0024] Figure 6 This is a schematic diagram of the structure of the sixth signal acquisition and processing device provided in the embodiments of this application;

[0025] Figure 7 This is a schematic diagram of the structure of the seventh signal acquisition and processing device provided in the embodiments of this application;

[0026] Figure 8 This is a schematic diagram of the structure of a track signal detection system provided in an embodiment of this application;

[0027] The icon numbers in the instruction manual are explained as follows:

[0028] 1. Signal acquisition and processing equipment; 2. Display device; 3. CAN to USB module; 10. Locomotive signal host; 11. Maintenance interface; 20. Coil interface; 30. Signal acquisition module; 31. First ADC chip; 32. Second ADC chip; 33. Isolation module; 40. Signal processing module; 41. First DSP chip; 42. Second DSP chip; 50. Data storage module; 51. Recording control chip; 52. TF card; 53. USB interface circuit; 54. Backup power supply; 55. Clock chip; 60. Wireless communication module; 61. CAN communication module; 70. Housing; 71. Antenna; 72. CAN interface; 73. Power button; 74. USB interface; 75. COM interface; 76. Network indicator light; 77. Running indicator light; 78. Magnet; 80. 485 communication module. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0031] To address the technical problem in existing technologies where the quality of track signals acquired at ground-based transmitters is difficult to accurately reflect the quality of track signals received at onboard receivers, this application provides a signal acquisition and processing device and a track signal detection system, which can solve the problem of the quality of track signals acquired at ground-based transmitters being difficult to accurately reflect the quality of track signals received at onboard receivers.

[0032] Figure 1 A signal acquisition and processing device is provided in the embodiments of this application. The signal acquisition and processing device includes:

[0033] The coil interface 20 is used to connect to the signal output terminal of the maintenance interface 11 of the locomotive signal host 10.

[0034] Specifically, the maintenance interface is the LX30 maintenance interface.

[0035] The signal acquisition module 30 is connected to the signal acquisition terminal and is used to perform analog-to-digital conversion processing on the track signal output by the signal acquisition terminal.

[0036] The signal processing module 40 is connected to the signal acquisition module 30 and is used to decode the track signal output by the signal acquisition module 30.

[0037] The data storage module 50 is connected to the signal processing module 40 and is used to store the track signal output by the signal processing module 40.

[0038] In the above embodiments, the signal acquisition module is responsible for acquiring track signals from the maintenance interface of the locomotive signal host through the coil interface and performing analog-to-digital conversion on the acquired track signals. The signal processing module is responsible for decoding the track signals, and the data storage module is responsible for storing the track signals. Compared with the prior art of acquiring track signals at the ground transmitting end for track signal quality analysis, this application directly obtains track signals from the maintenance interface of the locomotive signal host for track signal quality analysis, thereby solving the problem that the quality of track signals acquired at the ground transmitting end in the prior art is difficult to accurately reflect the quality of track signals received at the on-board receiving end.

[0039] In one alternative embodiment, such as Figure 2 and Figure 3 As shown, the data storage module 50 includes a recording control chip 51, which is connected to the signal processing module 40. The signal acquisition and processing device further includes:

[0040] Antenna 71 and wireless communication module 60, wherein the radio frequency signal interface of wireless communication module 60 is connected to antenna 71, the SPI output terminal of wireless communication module 60 is connected to SPI input terminal of recording control chip 51, and the SPI input terminal of wireless communication module 60 is connected to SPI output terminal of recording control chip 51.

[0041] Specifically, the wireless communication module can be an ATWINC1500-MR210UB communication module, and the recording control chip can be an STM32F205Z control chip.

[0042] Specifically, external devices can send wireless transmission commands to signal acquisition and processing equipment. These commands are received by the antenna in the form of radio frequency electromagnetic waves and enter the wireless communication module via its radio frequency signal interface. The wireless communication module converts the radio frequency electromagnetic wave commands into digital data and outputs them from its SPI output to the SPI input of the recording control chip. Upon receiving the wireless transmission commands, the recording control chip outputs the track signal stored in it to the SPI input of the wireless communication module via its SPI output. The wireless communication module then converts the track signal into radio frequency electromagnetic waves and outputs them to the antenna via its radio frequency signal interface, from which they are transmitted to the external device.

[0043] The CAN interface 72 and the CAN communication module 61 are provided. The differential signal interface of the CAN communication module 61 is connected to the CAN interface 72. The CAN output terminal of the CAN communication module 61 is connected to the CAN input terminal of the recording control chip 51. The CAN input terminal of the CAN communication module 61 is connected to the CAN output terminal of the recording control chip 51.

[0044] Specifically, the CAN communication module can be a communication module of model CTM8251.

[0045] Specifically, external devices can send wired transmission commands to signal acquisition and processing equipment. These commands are received by the CAN interface in differential signal form and enter the CAN communication module via the differential signal terminal. The CAN communication module converts the differential signal wired transmission commands into digital data form and outputs them to the CAN input terminal of the recording control chip via the CAN output terminal. After receiving the wired transmission commands, the recording control chip outputs the track signal stored in it to the CAN input terminal of the CAN communication module via its CAN output terminal. The CAN communication module converts the track signal into differential signal form and outputs it to the CAN interface via its radio frequency interface, from where it is transmitted to the external device.

[0046] In this embodiment, the signal acquisition and processing device has both wireless communication and wired communication functions.

[0047] In one alternative embodiment, such as Figure 4As shown, the signal acquisition module 30 includes a first ADC chip 31 and a second ADC chip 32. The analog input terminals of the first ADC chip 31 and the second ADC chip 32 are both connected to the signal acquisition terminal of the coil interface 20. The signal processing module 40 includes a first DSP chip 41 and a second DSP chip 42. The digital audio input terminal of the first DSP chip 41 is connected to the digital output terminal of the first ADC chip 31. The digital audio input terminal of the second DSP chip 42 is connected to the digital output terminal of the second ADC chip 32. The first UART output terminal of the first DSP chip 41 is connected to the UART input terminal of the second DSP chip 42. The first UART output terminal of the second DSP chip 42 is connected to the UART input terminal of the first DSP chip 41. The second UART output terminals of the first DSP chip 41 and the second UART output terminals of the second DSP chip 42 are both connected to the first UART input terminal of the recording control chip.

[0048] Specifically, the model of the first ADC chip and the model of the second ADC chip can both be TLV320AIC23B, and the model of the first DSP chip and the model of the second DSP chip can both be TMS320C6748.

[0049] Specifically, the first ADC chip receives the track signal from the signal acquisition terminal through its analog input terminal, converts the analog track signal into digital form, and outputs it to the digital audio input terminal of the first DSP chip through its digital output terminal. The first DSP chip then decodes the track signal. Similarly, the second ADC chip receives the track signal from the signal acquisition terminal through its analog input terminal, converts the analog track signal into digital form, and outputs it to the digital audio input terminal of the second DSP chip through its digital output terminal. The second DSP chip then decodes the track signal. The second DSP chip decodes the same track signal. Every 55ms, the first DSP chip outputs the decoding result (low frequency and carrier frequency of the track signal) to the UART input of the second DSP chip through the first UART output. The second DSP chip performs a consistency check between the decoding result of the first DSP chip and its own decoding result. If the two decoding results are the same, the second DSP chip inputs the decoding result to the first UART input of the recording control chip through the second UART output. The verification process of the first DSP chip is the same.

[0050] In this embodiment, redundant acquisition and processing channels composed of dual ADC chips and dual DSP chips are used to perform parallel and independent decoding processing on the same track signal, and cross-consistency verification is performed to ensure that the decoding processing result is output to the recording chip only when the two decoding processing results are completely consistent, thus ensuring the accuracy of the processing result.

[0051] In one alternative embodiment, such as Figure 5 As shown, the signal acquisition module 30 further includes an isolation module 33. The input terminal of the isolation module 33 is connected to the signal acquisition terminal of the coil interface 20, and the output terminal of the isolation module 33 is connected to the analog input terminal of the first ADC chip 31 and the analog input terminal of the second ADC chip 32.

[0052] Specifically, the isolation module can be an isolation module with model number ISO124P.

[0053] In this embodiment, an isolation module is set between the first ADC chip and the second ADC chip. The isolation module can isolate external environmental noise interference and reduce the impact of external environmental noise interference on the internal circuits of the signal acquisition and processing equipment.

[0054] In an optional embodiment, the power output terminal of the locomotive signal host is connected to the power input terminal of the coil interface. The power input terminals of the wireless communication module, the CAN communication module, the first ADC chip, the second ADC chip, the first DSP chip, the second DSP chip, the first power input terminal of the recording control chip, and the isolation module are all connected to a common node. The signal acquisition and processing device further includes:

[0055] A power button, the first end of which is connected to the power input terminal of the coil interface, and the second end of which is connected to the common node.

[0056] Specifically, he, such as Figure 3 As shown, the signal acquisition and processing device also includes a power button 73.

[0057] Specifically, transformers can be installed between the power input terminals of the common node and each module of the signal acquisition and processing equipment to adapt to the power supply voltage requirements of each module.

[0058] In this embodiment, if the power button is triggered, the power input terminal of the coil interface is connected to the common node, the signal acquisition and processing equipment is powered on, and the power output terminal of the locomotive signal host supplies power to the wireless communication module, CAN communication module, first ADC chip, second ADC chip, first DSP chip, second DSP chip, recording control chip and isolation module in the signal acquisition and processing equipment.

[0059] In one alternative embodiment, such as Figure 3 and Figure 6 As shown, the data storage module includes: a TF card 52; the SDIO input terminal of the TF card 52 is connected to the SDIO output terminal of the recording control chip 51, and the SDIO output terminal of the TF card 52 is connected to the SDIO input terminal of the recording control chip 51; a USB interface circuit 53, the USB input terminal of the USB interface circuit 53 is connected to the USB output terminal of the recording control chip 51, and the USB output terminal of the USB interface circuit 53 is connected to the USB input terminal of the recording control chip 51; a backup power supply 54, the power output terminal of the backup power supply 54 is connected to the second power input terminal of the recording control chip 51; and a clock chip 55, wherein the clock signal output terminal of the clock chip 55 is connected to the clock signal input terminal of the recording control chip 51. The signal acquisition and processing device further includes:

[0060] USB interface 74 is connected to the differential signal interface of USB interface circuit 53.

[0061] Specifically, the clock chip can be a DS3232MZ clock chip, which has an independent power supply.

[0062] Specifically, the power input terminal of the TF card is connected to the power output terminal of the backup power supply, and the power input terminal of the USB interface circuit is connected to the power output terminal of the backup power supply.

[0063] Specifically, transformers can be installed between the power output terminal of the backup power supply and the second power input terminal of the recording control chip, between the power output terminal of the backup power supply and the power input terminal of the TF card, and between the power output terminal of the backup power supply and the power input terminal of the USB interface circuit to adapt to the power supply voltage requirements of each module.

[0064] Specifically, after the signal acquisition and processing equipment is powered on, the recording control chip records all track signals received from its first UART input terminal to the TF card through its SDIO output terminal. After the signal acquisition and processing equipment is powered off, the recording control chip detects that the voltage at its first power input terminal is less than a predetermined voltage value and switches to its second power input terminal, with the backup power supply providing power. Since the clock chip has an independent power supply, the recording control chip can still obtain a clock signal from its clock signal output terminal. If an external device malfunctions or crashes, causing the track signals acquired by the external device through the wireless communication module or CAN communication module to be lost, a backup track signal acquisition command can be sent to the signal acquisition and processing equipment after it is powered off. The backup track signal acquisition command is received by the USB interface in the form of a differential signal and transmitted via the differential signal interface circuit. The USB interface circuit receives the backup track signal acquisition command from the differential signal. The USB interface circuit converts the backup track signal acquisition command into digital data and outputs it to the USB input of the recording control chip via the USB output. Upon receiving the backup track signal acquisition command, the recording control chip sends it to the SDIO input of the TF card via its SDIO output. Upon receiving the backup track signal acquisition command, the TF card outputs the track signal stored on it to the SDIO input of the recording control chip via its SDIO output. The recording control chip then outputs the track signal to the input of the USB interface circuit via its USB output. The USB interface circuit converts the track signal into a differential signal and returns the differential track signal to the USB interface via its differential signal interface.

[0065] In this embodiment, after the signal acquisition and processing device is powered on, the recording control chip records all the received track signals to the TF card. The recording control chip has an independent clock signal. After the signal acquisition and processing device is powered off, the backup power supply will power the recording control chip. If the external device malfunctions or crashes after the signal acquisition and processing device is powered off, resulting in the loss of track signals acquired by the external device through the wireless communication module or CAN communication module, the backed-up track signals in the TF card can be obtained through the USB interface, thus realizing the track signal backup function.

[0066] In one alternative embodiment, such as Figure 3 and Figure 7 As shown, the above-mentioned signal acquisition and processing equipment also includes:

[0067] The 485 communication module 80 has its UART output terminal connected to the second UART input terminal of the recording control chip 51, and its UART input terminal connected to the UART output terminal of the recording control chip 51.

[0068] COM interface 75, the differential signal interface between the COM interface 75 and the 485 communication module 80.

[0069] Specifically, the 485 communication module uses the RSM(3)485 series isolated communication module.

[0070] Specifically, the power input terminal of the 485 communication module is connected to the aforementioned common node, and the power output terminal of the locomotive signal host supplies power to the 485 communication module. A transformer can be installed between the common node and the power input terminal of the 485 communication module to adapt to the power supply voltage requirements of the 485 communication module.

[0071] In this embodiment, the recording control chip can be upgraded or maintained via the COM interface.

[0072] In one alternative embodiment, such as Figure 3 As shown, the above-mentioned signal acquisition and processing equipment also includes:

[0073] The network indicator light has its first end connected to the first I / O terminal of the recording control chip and its second end grounded. The network indicator light is used to indicate the transmission status of the antenna.

[0074] In this embodiment, the SPI input terminal of the recording control chip is connected to the SPI output terminal of the wireless communication module, and the SPI output terminal of the recording control chip is connected to the SPI input terminal of the wireless communication module. The recording control chip can determine the transmission status of the antenna based on the data interaction with the wireless communication module, and dynamically set the on / off and flashing modes of the network indicator light to intuitively display the transmission status of the antenna. The specific indication method and corresponding transmission status can be set as needed and are not limited here. For example, if the network indicator light does not flash, it means that the antenna is not connected to the wireless network; if it flashes quickly, it means that the antenna has successfully connected to the wireless network and is transmitting data.

[0075] In an optional embodiment, the signal acquisition and processing device further includes:

[0076] The operation indicator light has its first terminal connected to the second I / O terminal of the recording control chip, and its second terminal grounded. The operation indicator light is used to indicate the operating status of the signal acquisition and processing device.

[0077] In this embodiment, the recording control chip can determine the operating status of the signal acquisition and processing device based on the data interaction with other modules in the signal acquisition and processing device, and dynamically set the on / off and flashing modes of the network indicator light to intuitively display the operating status of the signal acquisition and processing device. The specific indication method and corresponding operating status can be set as needed and are not limited here. For example, a solid light indicates that the signal acquisition and processing device is powered on, and a fast flash indicates that backup data is being acquired through the USB interface.

[0078] In one alternative embodiment, such as Figure 3 As shown, the signal acquisition and processing equipment includes:

[0079] Casing 70;

[0080] Specifically, the outer shell is made of aluminum alloy, which has the characteristics of compact structure, sturdiness and anti-interference.

[0081] Specifically, such as Figure 3 As shown, the coil interface 20, the antenna 71, the CAN interface 72, the power button 73, the USB interface 74, the COM interface 75, the network indicator 76, and the operation indicator 77 are all mounted on the housing 70.

[0082] Magnet 78 is disposed at the bottom of the outer casing 70.

[0083] Specifically, magnets are used to fix signal acquisition and processing equipment.

[0084] In this embodiment, an outer casing is provided to protect the internal circuitry of the signal acquisition and processing equipment, and a magnet is provided to facilitate fixing the signal acquisition and processing equipment.

[0085] Figure 8 A track signal detection system provided in this application embodiment includes:

[0086] Any of the above-mentioned signal acquisition and processing devices 1;

[0087] CAN to USB module 3, the CAN interface of the CAN to USB module 3 is used to connect to the CAN interface of the signal acquisition and processing device 1.

[0088] Display device 2, the USB interface of the display device 2 is used to connect with the USB interface of the CAN to USB module 3, and the antenna of the display device 2 is used to connect with the antenna of the signal acquisition and processing device 1.

[0089] Specifically, the display device uses a rugged flat panel.

[0090] In this embodiment, the display device can receive the track signal sent by the antenna of the signal acquisition and processing device via the antenna, or receive the track signal sent by the CAN interface of the signal acquisition and processing device via the USB interface and the CAN to USB module. The display device is used to display the track signal.

[0091] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0092] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A signal acquisition and processing device, characterized in that, The signal acquisition and processing equipment includes: A coil interface, wherein the signal acquisition end of the coil interface is used to connect to the signal output end of the maintenance interface of the locomotive signal host; A signal acquisition module is connected to the signal acquisition terminal, and the signal acquisition module is used to perform analog-to-digital conversion processing on the track signal output by the signal acquisition terminal; A signal processing module is connected to the signal acquisition module, and the signal processing module is used to decode the track signal output by the signal acquisition module; A data storage module is connected to the signal processing module and is used to store the track signal output by the signal processing module.

2. The signal acquisition and processing device according to claim 1, characterized in that, The data storage module includes a recording control chip, which is connected to the signal processing module. The signal acquisition and processing device further includes: An antenna and a wireless communication module, wherein the radio frequency signal interface of the wireless communication module is connected to the antenna, the SPI output terminal of the wireless communication module is connected to the SPI input terminal of the recording control chip, and the SPI input terminal of the wireless communication module is connected to the SPI output terminal of the recording control chip; The system includes a CAN interface and a CAN communication module. The differential signal interface of the CAN communication module is connected to the CAN interface. The CAN output terminal of the CAN communication module is connected to the CAN input terminal of the recording control chip, and the CAN input terminal of the CAN communication module is connected to the CAN output terminal of the recording control chip.

3. The signal acquisition and processing device according to claim 2, characterized in that, The signal acquisition module includes a first ADC chip and a second ADC chip. The analog input terminals of both the first and second ADC chips are connected to the signal acquisition terminal of the coil interface. The signal processing module includes a first DSP chip and a second DSP chip. The digital audio input terminal of the first DSP chip is connected to the digital output terminal of the first ADC chip. The digital audio input terminal of the second DSP chip is connected to the digital output terminal of the second ADC chip. The first UART output terminal of the first DSP chip is connected to the UART input terminal of the second DSP chip. The first UART output terminal of the second DSP chip is connected to the UART input terminal of the first DSP chip. The second UART output terminals of both the first and second DSP chips are connected to the first UART input terminal of the recording control chip.

4. The signal acquisition and processing device according to claim 3, characterized in that, The signal acquisition module further includes an isolation module, the input terminal of which is connected to the signal acquisition terminal of the coil interface, and the output terminal of which is connected to the analog input terminal of the first ADC chip and the analog input terminal of the second ADC chip.

5. The signal acquisition and processing device according to claim 4, characterized in that, The power output terminal of the locomotive signal host is connected to the power input terminal of the coil interface. The power input terminals of the wireless communication module, the CAN communication module, the first ADC chip, the second ADC chip, the first DSP chip, the second DSP chip, the first power input terminal of the recording control chip, and the isolation module are all connected to a common node. The signal acquisition and processing equipment further includes: A power button, the first end of which is connected to the power input terminal of the coil interface, and the second end of which is connected to the common node.

6. The signal acquisition and processing device according to claim 5, characterized in that, The data storage module includes: a TF card; the SDIO input terminal of the TF card is connected to the SDIO output terminal of the recording control chip, and the SDIO output terminal of the TF card is connected to the SDIO input terminal of the recording control chip; a USB interface circuit, the USB input terminal of the USB interface circuit is connected to the USB output terminal of the recording control chip, and the USB output terminal of the USB interface circuit is connected to the USB input terminal of the recording control chip; a backup power supply, the power output terminal of the backup power supply is connected to the second power input terminal of the recording control chip; and a clock chip, wherein the clock signal output terminal of the clock chip is connected to the clock signal input terminal of the recording control chip. The signal acquisition and processing device further includes: The USB interface is connected to the differential signal interface of the USB interface circuit.

7. The signal acquisition and processing device according to claim 6, characterized in that, The signal acquisition and processing equipment also includes: The 485 communication module has its UART output connected to the second UART input of the recording control chip, and its UART input connected to the UART output of the recording control chip. The COM interface is a differential signal interface between the COM interface and the 485 communication module.

8. The signal acquisition and processing device according to claim 7, characterized in that, The signal acquisition and processing equipment also includes: A network indicator light, the first end of which is connected to the first I / O terminal of the recording control chip, and the second end of which is grounded, is used to indicate the transmission status of the antenna.

9. The signal acquisition and processing device according to claim 8, characterized in that, The signal acquisition and processing equipment also includes: The operation indicator light has a first terminal connected to the second I / O terminal of the recording control chip and a second terminal grounded. The operation indicator light is used to indicate the operating status of the signal acquisition and processing device.

10. A track signal detection system, characterized in that, The track signal detection system includes: The signal acquisition and processing device according to any one of claims 1 to 9; A CAN to USB module, wherein the CAN interface of the CAN to USB module is used to connect to the CAN interface of the signal acquisition and processing device; The display device has a USB interface for connecting to the USB interface of the CAN-to-USB module, and its antenna is for connecting to the antenna of the signal acquisition and processing device.

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