A magnetic signal transmission device

Abstract

This utility model relates to a magnetic steel signal transmission device, including a signal transmitting module and a signal receiving module. The signal transmitting module and the signal receiving module communicate wirelessly via an antenna. The signal transmitting module receives the signal from the trackside magnetic steel and transmits it wirelessly to the signal receiving module. The signal receiving module simulates and reproduces a signal similar to that of a passive magnetic steel and transmits it to the AEI device. Because this device can wirelessly transmit the AEI power-on magnetic steel signal to the AEI host, it eliminates the need to dig trenches and bury power-on magnetic steel signal cables, saving construction costs and manpower. Furthermore, the device features a dual-channel magnetic steel signal design, enabling its use in a wide range of applications.

Description

Technical Field

[0001] This utility model relates to the field of railway equipment technology, and in particular to a magnetic steel signal transmission device. Background Technology

[0002] Currently, the distance between the start-up magnet and the AEI host of the railway mainline AEI equipment is more than 50 meters. Excavating and backfilling the cable trenches is time-consuming, resulting in high material and construction costs for equipment installation. Laying the start-up magnet signal cable requires approval from relevant railway departments before trenching and backfilling on the roadbed is permitted. The approval process is extremely lengthy and involves numerous procedures, impacting the overall progress of the AEI equipment installation project. Summary of the Invention

[0003] This invention provides a magnetic signal transmission device, which aims to solve the problems of excessive restrictions on the laying of signal cables in existing AEI equipment and slow installation progress.

[0004] This utility model provides a magnetic steel signal transmission device, including a signal transmitting module and a signal receiving module. The signal transmitting module and the signal receiving module communicate wirelessly through an antenna. The signal transmitting module receives the signal from the trackside magnetic steel and transmits it wirelessly to the signal receiving module. The signal receiving module simulates and reproduces a signal similar to that of a passive magnetic steel and transmits it to an AEI device.

[0005] As a further improvement of this utility model, the signal transmitting module includes a main control MCU chip U5, a magnet signal processing circuit, and a first RF transceiver. The railside magnet signal is connected to the input terminal of the magnet signal processing circuit, the output terminal of the magnet signal processing circuit is connected to the main control MCU chip U5, the main control MCU chip U5 is connected to the first RF transceiver, and the first RF transceiver transmits the magnet signal to the signal receiving module.

[0006] As a further improvement of this utility model, the signal transmitting module also includes a first voltage regulator module that provides power to the module. The first voltage regulator module includes a voltage regulator chip U3 and a voltage regulator chip U4. The 7th pin of the voltage regulator chip U3 is connected to the battery voltage, the 1st pin of the voltage regulator chip U3 outputs a +5V voltage, the 2nd pin of the voltage regulator chip U4 is connected to a +5V voltage, and the 3rd pin of the voltage regulator chip U4 outputs a 3.3V voltage.

[0007] As a further improvement of this utility model, the magnet signal processing circuit includes a first filter circuit, a second filter circuit, an operational amplifier U1A, an operational amplifier U1B, a micro switch JW1, and a micro switch JW2. Pins 1 and 2 of the magnet signal interface J2 are connected to the input terminal of the first filter circuit, the output terminal of the first filter circuit is connected to the inverting input terminal of the operational amplifier U1A, the non-inverting input terminal of the operational amplifier U1A is connected to a 3.3V voltage, the output terminal of the operational amplifier U1A is connected to pin 1 of the micro switch JW1, pin 2 of the micro switch JW1 is connected to pin 22 of the main control MCU chip U5, pins 3 and 4 of the magnet signal interface J2 are connected to the input terminal of the second filter circuit, the output terminal of the second filter circuit is connected to the inverting input terminal of the operational amplifier U1B, the non-inverting input terminal of the operational amplifier U1B is connected to a 3.3V voltage, the output terminal of the operational amplifier U1B is connected to pin 1 of the micro switch JW2, and pin 2 of the micro switch JW1 is connected to pin 23 of the main control MCU chip U5.

[0008] As a further improvement of this utility model, the first RF transceiver includes a transceiver chip U6, pin 2 of the transceiver chip U6 is connected to pin 40 of the main control MCU chip U5, pin 5 of the transceiver chip U6 is connected to pin 50 of the main control MCU chip U5, pin 6 of the transceiver chip U6 is connected to pin 45 of the main control MCU chip U5, pin 7 of the transceiver chip U6 is connected to pin 44 of the main control MCU chip U5, pin 8 of the transceiver chip U6 is connected to pin 55 of the main control MCU chip U5, and pin 9 of the transceiver chip U6 is connected to pin 39 of the main control MCU chip U5.

[0009] As a further improvement of this utility model, the signal receiving module includes a main control MCU chip U15, a magnet signal simulation restoration circuit, and a second RF transceiver. The first RF transceiver transmits the magnet signal to the second RF transceiver. The output terminal of the second RF transceiver is connected to the main control MCU chip U15. The main control MCU chip U15 is connected to the magnet signal simulation restoration circuit. The output terminal of the magnet signal simulation restoration circuit is connected to the AEI device and outputs a sine wave signal of the passive magnet.

[0010] As a further improvement of this utility model, the signal receiving module further includes a second voltage regulator module that provides power to the module. The second voltage regulator module includes a voltage regulator chip U11 and a voltage regulator chip U13. The 7th pin of the voltage regulator chip U13 is connected to the battery voltage, the 1st pin of the voltage regulator chip U13 outputs a +5V voltage, the 2nd pin of the voltage regulator chip U11 is connected to a +5V voltage, and the 3rd pin of the voltage regulator chip U11 outputs a 3.3V voltage.

[0011] As a further improvement of this utility model, the second RF transceiver includes a transceiver chip U17. Pin 2 of the transceiver chip U17 is connected to pin 40 of the main control MCU chip U15, pin 5 of the transceiver chip U17 is connected to pin 50 of the main control MCU chip U15, pin 6 of the transceiver chip U17 is connected to pin 45 of the main control MCU chip U15, pin 7 of the transceiver chip U17 is connected to pin 44 of the main control MCU chip U15, pin 8 of the transceiver chip U17 is connected to pin 55 of the main control MCU chip U15, and pin 9 of the transceiver chip U17 is connected to pin 39 of the main control MCU chip U15.

[0012] As a further improvement of this utility model, the first RF transceiver and the second RF transceiver use the same frequency band.

[0013] As a further improvement of this utility model, the magnetic steel signal analog restoration circuit includes operational amplifier U8A and operational amplifier U8B. The non-inverting input terminal of operational amplifier U8A is connected to pin 20 of the main control MCU chip U15, the inverting input terminal of operational amplifier U8A is grounded, the output terminal of operational amplifier U8A is connected to pin 2 of AEI device interface J2, the non-inverting input terminal of operational amplifier U8B is connected to pin 21 of the main control MCU chip U15, the inverting input terminal of operational amplifier U8B is grounded, and the output terminal of operational amplifier U8B is connected to pin 4 of AEI device interface J2.

[0014] The beneficial effects of this utility model are: since the device can wirelessly send the AEI power-on magnet signal to the AEI host, there is no need to dig trenches to bury the power-on magnet signal cable, saving construction costs and manpower. At the same time, the device also has a dual magnet signal channel design, which can be used in a variety of situations. Attached Figure Description

[0015] Figure 1 This is a diagram showing the connection relationships between the various circuit structures of this utility model;

[0016] Figure 2 This is a detailed circuit diagram of the MCU chip in the signal transmission module of this utility model;

[0017] Figure 3 This is a detailed circuit diagram of the first voltage regulator module in the signal transmission module of this utility model;

[0018] Figure 4 This is a detailed circuit diagram of the magnet signal processing circuit in the signal transmission module of this utility model;

[0019] Figure 5 This is a detailed circuit diagram of the first RF transceiver in the signal transmission module of this utility model;

[0020] Figure 6 This is a detailed circuit diagram of the auxiliary components in the signal transmitting module of this utility model;

[0021] Figure 7 This is a detailed circuit diagram of the signal receiving module of this utility model;

[0022] Figure 8 This is a detailed circuit diagram of the second voltage regulator module and power conversion unit in the signal receiving module of this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0024] This utility model provides a magnetic steel signal transmission device, including a signal transmitting module and a signal receiving module. The signal transmitting module and the signal receiving module communicate wirelessly through an antenna. The signal transmitting module receives the signal from the trackside magnetic steel and transmits it wirelessly to the signal receiving module. The signal receiving module simulates and reproduces a signal similar to that of a passive magnetic steel and transmits it to an AEI device.

[0025] In this solution, a passive magnet for AEI power-on is installed inside the rail. The signal generated when the wheel passes over the magnet is transmitted via a wired connection to the signal transmitting module. The signal transmitting module limits, filters, and biases the signal generated by the magnet, converts it into a digital signal after software filtering, and then transmits it wirelessly to the signal receiving module. The signal receiving module receives the digital signal sent by the signal transmitting module using a wireless transceiver chip and transmits it to the MCU processor. The MCU, based on the received information, reconstructs an analog signal similar to that of the passive magnet for use in powering on the AEI device.

[0026] The signal transmitting module and the signal receiving module communicate wirelessly via a wireless antenna to wirelessly transmit the magnetic steel signal of the rail to the AEI device host. This transmission method is not only convenient and fast, but also eliminates the need to lay lines and dig trenches along the rail, minimizing the impact of construction on railway transportation and reducing the approval time for the corresponding construction.

[0027] In one embodiment of this utility model, the signal transmitting module includes a main control MCU chip U5, a magnet signal processing circuit, and a first RF transceiver. The railside magnet signal is connected to the input terminal of the magnet signal processing circuit, the output terminal of the magnet signal processing circuit is connected to the main control MCU chip U5, and the main control MCU chip U5 is connected to the first RF transceiver. The first RF transceiver transmits the magnet signal to the signal receiving module. The main control MCU chip U5 is an STM32L151.

[0028] In another embodiment of this utility model, the signal transmitting module further includes a first voltage regulator module for providing power to the module. The first voltage regulator module includes a voltage regulator chip U3 and a voltage regulator chip U4. Pin 7 of voltage regulator chip U3 is connected to the battery voltage, pin 1 of voltage regulator chip U3 outputs +5V voltage, pin 2 of voltage regulator chip U4 is connected to +5V voltage, and pin 3 of voltage regulator chip U4 outputs 3.3V voltage. The voltage regulator chip U3 is a TPS5430, and the voltage regulator chip U4 is an XC6206P332PR.

[0029] like Figure 3 As shown, the signal transmitting module is powered by a lithium-thionyl chloride battery. The battery voltage introduced by socket J1 is processed into a +5V voltage output by voltage regulator chip U3 and connected to voltage regulator chip U4 of integrated circuit. The first voltage regulator module circuit converts the battery voltage into a stable and lower output voltage for use by the wireless transmitting module. DY is designed as a power indicator light.

[0030] In another embodiment of this utility model, the magnet signal processing circuit includes a first filter circuit, a second filter circuit, an operational amplifier U1A, an operational amplifier U1B, a micro switch JW1, and a micro switch JW2. Pins 1 and 2 of the magnet signal interface J2 are connected to the input of the first filter circuit, the output of the first filter circuit is connected to the inverting input of the operational amplifier U1A, the non-inverting input of the operational amplifier U1A is connected to a 3.3V voltage, the output of the operational amplifier U1A is connected to pin 1 of the micro switch JW1, pin 2 of the micro switch JW1 is connected to pin 22 of the main control MCU chip U5, pins 3 and 4 of the magnet signal interface J2 are connected to the input of the second filter circuit, the output of the second filter circuit is connected to the inverting input of the operational amplifier U1B, the non-inverting input of the operational amplifier U1B is connected to a 3.3V voltage, the output of the operational amplifier U1B is connected to pin 1 of the micro switch JW2, and pin 2 of the micro switch JW1 is connected to pin 23 of the main control MCU chip U5.

[0031] like Figure 4 As shown, the signal transmitting module can receive two signals: a passive magnet output signal, which is connected to the magnet signal processing circuit via the C1IN+ / C1IN- or C2IN+ / C2IN- ports. The magnet analog signal is filtered by a high-frequency and low-frequency differential-mode filter circuit composed of Zener diodes D1 and D2, and a high-frequency common-mode filter circuit, which shapes the slowly changing magnet input analog signal into a rectangular pulse with steep edges. The magnet signal then passes through operational amplifiers U1A and U1B, microswitches JW1 and JW2, converting the magnet signal into a level signal, which is then provided to the main control MCU chip U5 for discrimination.

[0032] like Figure 2 As shown, pins 22 and 23 of the main control MCU chip U5 receive the magnet signals C1-IN and C2-IN. After software filtering by a specific program, the corresponding information is packaged according to the user protocol and output to the transceiver chip U6 of the first RF transceiver via pins 44 and 45 of the main control MCU chip U5. The main control MCU chip U5 is a low-power device that integrates multiple on-chip peripherals. The peripherals used by the signal transmission module include two timers, two serial ports, one SPI interface, one ADC converter, and multiple GPIO interfaces.

[0033] In another embodiment of this utility model, the first RF transceiver includes a transceiver chip U6. Pin 2 of the transceiver chip U6 is connected to pin 40 of the main control MCU chip U5, pin 5 of the transceiver chip U6 is connected to pin 50 of the main control MCU chip U5, pin 6 of the transceiver chip U6 is connected to pin 45 of the main control MCU chip U5, pin 7 of the transceiver chip U6 is connected to pin 44 of the main control MCU chip U5, pin 8 of the transceiver chip U6 is connected to pin 55 of the main control MCU chip U5, and pin 9 of the transceiver chip U6 is connected to pin 39 of the main control MCU chip U5. The transceiver chip U6 is model AS10-M4463D.

[0034] like Figure 5 As shown, the transceiver chip U6 operates in the frequency band between 470MHz and 502MHz, configurable by a 6-bit DIP switch. Each module has 2^6=64 selectable channels, which must match the DIP switches of the paired signal receiving module (i.e., ensuring complete channel synchronization between transceiver modules). The lowest frequency used is 470MHz, with each channel having a bandwidth of 500kHz, totaling 64 channels occupying 32MHz. The last channel operates at 502MHz. The first RF transceiver uses a four-wire SPI interface, with a maximum transmit power of 20dBm, a maximum transmission distance of 2km in open areas, high receiving sensitivity, strong anti-interference capability, and a temperature range of -40~85℃. The transceiver chip U6 interacts with the main control MCU chip U5 via the SPI interface (pins 44 and 45), and then, when matched with a high-performance SMA interface antenna, transmits the digital signal from the magnet to the signal receiving module.

[0035] In another embodiment of this utility model, the signal receiving module includes a main control MCU chip U15, a magnet signal simulation restoration circuit, and a second RF transceiver. The first RF transceiver transmits the magnet signal to the second RF transceiver. The output of the second RF transceiver is connected to the main control MCU chip U15. The main control MCU chip U15 is connected to the magnet signal simulation restoration circuit, and the output of the magnet signal simulation restoration circuit is connected to an AEI device, outputting a sinusoidal signal from the passive magnet. The first RF transceiver and the second RF transceiver use the same frequency band. The main control MCU chip U15 is an STM32L151.

[0036] like Figure 7 As shown, in another embodiment of this utility model, the second RF transceiver includes a transceiver chip U17. Pin 2 of the transceiver chip U17 is connected to pin 40 of the main control MCU chip U15, pin 5 of the transceiver chip U17 is connected to pin 50 of the main control MCU chip U15, pin 6 of the transceiver chip U17 is connected to pin 45 of the main control MCU chip U15, pin 7 of the transceiver chip U17 is connected to pin 44 of the main control MCU chip U15, pin 8 of the transceiver chip U17 is connected to pin 55 of the main control MCU chip U15, and pin 9 of the transceiver chip U17 is connected to pin 39 of the main control MCU chip U15. The transceiver chip U17 is model AS10-M4463D.

[0037] The second RF transceiver receives data from the first RF transceiver, verifies its accuracy via hardware, and then transmits it to the backend main control MCU chip U15 for processing through the SPI interface. Since the first and second RF transceivers use the same frequency band, they can quickly match and connect. Through the wireless antennas on the signal transmitting and receiving modules, the first and second RF transceivers transmit signals.

[0038] In another embodiment of this utility model, the signal receiving module further includes a second voltage regulator module to provide power to the module. The second voltage regulator module includes voltage regulator chips U11 and U13. Pin 7 of voltage regulator chip U13 is connected to the battery voltage, pin 1 of voltage regulator chip U13 outputs +5V, pin 2 of voltage regulator chip U11 is connected to +5V, and pin 3 of voltage regulator chip U11 outputs 3.3V. Voltage regulator chip U11 is a TPS5430, and voltage regulator chip U13 is an XC6206P332PR.

[0039] like Figure 7-8As shown, the external power supply is connected to the power conversion unit, including TPS5430 voltage regulator chips U11 and U01. The conversion circuit converts the input voltage to DC+5V and DC-12V for use by other circuits inside the signal receiving module. L1 and L01 are designed as power indicator lights. The conversion circuit connects to the integrated circuit voltage regulator chip U3, which converts the input voltage into a stable and lower output voltage for use by the wireless receiving module.

[0040] In another embodiment of this utility model, the magnetic steel signal analog restoration circuit includes operational amplifier U8A and operational amplifier U8B. The non-inverting input terminal of operational amplifier U8A is connected to pin 20 of the main control MCU chip U15, the inverting input terminal of operational amplifier U8A is grounded, the output terminal of operational amplifier U8A is connected to pin 2 of the AEI device interface J2, the non-inverting input terminal of operational amplifier U8B is connected to pin 21 of the main control MCU chip U15, the inverting input terminal of operational amplifier U8B is grounded, and the output terminal of operational amplifier U8B is connected to pin 4 of the AEI device interface J2.

[0041] like Figure 7 As shown, this circuit mainly includes the DA converter of the main control MCU chip U15, and operational amplifiers U8A and U8B powered by ±12V. After receiving the digital signal from the magnet at pins 44 and 45 of the main control MCU chip U15, the main control MCU chip U15 calculates the period corresponding to the passive magnet's sine wave based on the speed of the wheel passing over the magnet using a specific software algorithm. The main control MCU chip U15's built-in DAC converter simulates and outputs a sine wave signal, which is input to operational amplifiers U8A and U8B through pins 20 and 21, outputting two sine wave signals with peak-to-peak values ​​of -12V to +12V, which can be connected to AEI devices from the J2 port.

[0042] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A magnetic steel signal transmission device, characterized by, It includes a signal transmitting module and a signal receiving module. The signal transmitting module and the signal receiving module communicate wirelessly via an antenna. The signal transmitting module receives the signal from the railside magnet and transmits it wirelessly to the signal receiving module. The signal receiving module simulates and reproduces a signal similar to that of the passive magnet and transmits it to the AEI device.

2. The apparatus of claim 1, wherein: The signal transmitting module includes a main control MCU chip U5, a magnet signal processing circuit, and a first RF transceiver. The railside magnet signal is connected to the input terminal of the magnet signal processing circuit, the output terminal of the magnet signal processing circuit is connected to the main control MCU chip U5, the main control MCU chip U5 is connected to the first RF transceiver, and the first RF transceiver transmits the magnet signal to the signal receiving module.

3. The apparatus of claim 2 wherein the magnetic steel signal is transmitted by a magnetic field. The signal transmitting module also includes a first voltage regulator module that provides power to the module. The first voltage regulator module includes a voltage regulator chip U3 and a voltage regulator chip U4. Pin 7 of the voltage regulator chip U3 is connected to the battery voltage, pin 1 of the voltage regulator chip U3 outputs a +5V voltage, pin 2 of the voltage regulator chip U4 is connected to a +5V voltage, and pin 3 of the voltage regulator chip U4 outputs a 3.3V voltage.

4. The apparatus of claim 2 wherein, The magnet signal processing circuit includes a first filter circuit, a second filter circuit, operational amplifiers U1A and U1B, microswitches JW1 and JW2. Pins 1 and 2 of the magnet signal interface J2 are connected to the input of the first filter circuit. The output of the first filter circuit is connected to the inverting input of operational amplifier U1A. The non-inverting input of operational amplifier U1A is connected to a 3.3V voltage. The output of operational amplifier U1A is connected to pin 1 of microswitches JW1. Pin 2 of microswitches JW1 is connected to pin 22 of the main control MCU chip U5. Pins 3 and 4 of the magnet signal interface J2 are connected to the input of the second filter circuit. The output of the second filter circuit is connected to the inverting input of operational amplifier U1B. The non-inverting input of operational amplifier U1B is connected to a 3.3V voltage. The output of operational amplifier U1B is connected to pin 1 of microswitches JW2. Pin 2 of microswitches JW1 is connected to pin 23 of the main control MCU chip U5.

5. The apparatus of claim 2 wherein, The first RF transceiver includes a transceiver chip U6. Pin 2 of the transceiver chip U6 is connected to pin 40 of the main control MCU chip U5. Pin 5 of the transceiver chip U6 is connected to pin 50 of the main control MCU chip U5. Pin 6 of the transceiver chip U6 is connected to pin 45 of the main control MCU chip U5. Pin 7 of the transceiver chip U6 is connected to pin 44 of the main control MCU chip U5. Pin 8 of the transceiver chip U6 is connected to pin 55 of the main control MCU chip U5. Pin 9 of the transceiver chip U6 is connected to pin 39 of the main control MCU chip U5.

6. The apparatus of claim 2 wherein, The signal receiving module includes a main control MCU chip U15, a magnet signal simulation restoration circuit, and a second RF transceiver. The first RF transceiver transmits the magnet signal to the second RF transceiver. The output of the second RF transceiver is connected to the main control MCU chip U15. The main control MCU chip U15 is connected to the magnet signal simulation restoration circuit. The output of the magnet signal simulation restoration circuit is connected to the AEI device and outputs a sine wave signal of the passive magnet.

7. The apparatus of claim 6 wherein the magnetic steel signal is transmitted by a magnetic field. The signal receiving module also includes a second voltage regulator module that provides power to the module. The second voltage regulator module includes a voltage regulator chip U11 and a voltage regulator chip U13. Pin 7 of the voltage regulator chip U13 is connected to the battery voltage, pin 1 of the voltage regulator chip U13 outputs a +5V voltage, pin 2 of the voltage regulator chip U11 is connected to a +5V voltage, and pin 3 of the voltage regulator chip U11 outputs a 3.3V voltage.

8. The apparatus of claim 6 wherein the magnetic steel signal is transmitted by a magnetic field. The second RF transceiver includes a transceiver chip U17. Pin 2 of the transceiver chip U17 is connected to pin 40 of the main control MCU chip U15. Pin 5 of the transceiver chip U17 is connected to pin 50 of the main control MCU chip U15. Pin 6 of the transceiver chip U17 is connected to pin 45 of the main control MCU chip U15. Pin 7 of the transceiver chip U17 is connected to pin 44 of the main control MCU chip U15. Pin 8 of the transceiver chip U17 is connected to pin 55 of the main control MCU chip U15. Pin 9 of the transceiver chip U17 is connected to pin 39 of the main control MCU chip U15.

9. The apparatus of claim 6 wherein, The first RF transceiver and the second RF transceiver use the same frequency band.

10. The apparatus of claim 6 wherein, The magnetic signal simulation and restoration circuit includes operational amplifiers U8A and U8B. The non-inverting input of operational amplifier U8A is connected to pin 20 of the main control MCU chip U15, the inverting input of operational amplifier U8A is grounded, and the output of operational amplifier U8A is connected to pin 2 of the AEI device interface J2. The non-inverting input of operational amplifier U8B is connected to pin 21 of the main control MCU chip U15, the inverting input of operational amplifier U8B is grounded, and the output of operational amplifier U8B is connected to pin 4 of the AEI device interface J2.

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