Train protection warning radio station based on DMR and Beidou positioning and its implementation method

Abstract

The present invention discloses a train protection warning radio station based on DMR and Beidou positioning and an implementation method. The train protection warning radio station includes a main control unit provided with a power conversion circuit, a processor circuit, a storage circuit, a data interface circuit and a USB interface circuit, and also includes a power supply unit, a DMR communication and positioning module, a 400M antenna and a satellite positioning antenna. The present invention can realize the sub-meter Beidou high-precision satellite positioning and the reporting function of train position information data and driving information data, provide train position information data and driving information data for the railway train safety protection warning system, and have the function of recording data storage and downloading and the function of synchronously resetting with the locomotive integrated wireless communication equipment, which is of great significance to ensuring railway driving safety and the personal safety of construction workers and improving transportation operation efficiency.

Description

Technical Field

[0001] The present invention relates to a railway train safety protection warning system, and in particular to a DMR and Beidou positioning-based train protection warning radio station and an implementation method thereof, which can realize sub-meter-level Beidou high-precision satellite positioning and train position information data and driving information data reporting functions, and provide train position information data and driving information data for the railway train safety protection warning system. Background Art

[0002] In order to ensure the safe and fast operation of trains, railway engineering and electrical personnel need to maintain and inspect relevant equipment and facilities along the railway all year round. With the continuous increase in the speed of railway operation in my country, fast-passing trains may pose a serious threat to the personal safety of construction workers along the railway. At present, the technical means adopted by the railway engineering and electrical departments are manual safety protection warning and train safety protection warning systems. The method of manual safety protection warning is to set up station guards in stations along the railway and set up on-site guards at the construction site. When the train approaches, the station guards notify the on-site guards through fixed radio stations, and then the on-site guards notify the construction workers to get off the road; this method has problems such as poor communication in long-distance and mountain tunnels and other complex terrain areas, easy interference of communication in adjacent work areas, no unified command and dispatch management, complex warning operations, poor timeliness, and high requirements for the concentration of station assistants and on-site guards. The traditional train safety protection warning system is to broadcast the train approach warning data information through the locomotive integrated wireless communication equipment, and the ground protection equipment receives the warning information and issues an alarm to notify the construction workers to get off the road; the system has problems such as low train positioning accuracy, high probability of false alarms, inability to use normally in hubs or merging areas, serious interference from single analog frequency wireless communication, and difficulty in sustaining the frequency recovery supply chain. In combination with the needs of on-site use and adapting to the development trend and policy orientation of the country's comprehensive promotion of Beidou positioning technology and digital intercom technology, the new generation of railway train safety protection warning system will adopt DMR digital cluster communication technology and sub-meter Beidou high-precision positioning technology, and have centralized dispatching management and intelligent precise warning functions; this requires the locomotive radio equipment to have sub-meter Beidou high-precision satellite positioning and train position information data and driving information data reporting functions. Summary of the invention

[0003] In view of the problems existing in the prior art, in order to meet the functional requirements of a new generation of railway train safety protection warning systems based on DMR digital trunking communication technology and sub-meter Beidou high-precision positioning technology, the present invention provides a train protection warning radio station based on DMR and Beidou positioning and an implementation method, which can realize sub-meter Beidou high-precision satellite positioning and reporting functions of train position information data and driving information data, and provide train position information data and driving information data for a new generation of railway train safety protection warning systems.

[0004] The technical solution adopted by the present invention is: a train protection and warning radio station based on DMR and Beidou positioning includes a main control unit provided with a power conversion circuit, a processor circuit, a storage circuit, a data interface circuit and a USB interface circuit, and also includes a power supply unit, a DMR communication and positioning module, a 400M antenna and a satellite positioning antenna.

[0005] The processor circuit of the main control unit is respectively connected to the storage circuit, the data interface circuit and the USB interface circuit; the power supply input interface P1 of the power supply unit is connected to the external DC110V locomotive power supply, the 8.5V power supply output interface is connected to the 8.5V power supply input interface of the DMR communication and positioning module, the 13.8V power supply output interface is connected to the 13.8V power supply input interface of the main control unit power conversion circuit, and the reset input interface RSTI is connected to the reset output interface RSTO of the main control unit data interface circuit.

[0006] The data interface D1 of the data interface circuit of the main control unit is connected to the data interface 4 of the external locomotive integrated wireless communication device, and the USB interface U1 of the USB interface circuit is connected to the external USB storage device.

[0007] The DMR communication and positioning module communication interface UART is connected to the serial bus interface UART2 of the main control unit processor circuit, the DMR communication antenna interface T1 is connected to the 400M antenna, and the satellite positioning antenna interface T2 is connected to the satellite positioning antenna.

[0008] The method for realizing the train protection warning radio station based on DMR and Beidou positioning of the present invention includes: a method for realizing satellite positioning data and driving data acquisition and reporting, a method for storing and downloading recorded data and realizing synchronous resetting of the locomotive integrated wireless communication device.

[0009] 1. The steps of the satellite positioning data and driving data acquisition and reporting method are as follows:

[0010] A1. The DMR communication and positioning module receives and acquires meter-level Beidou satellite positioning data through a satellite positioning antenna, receives and acquires sub-meter-level Beidou satellite positioning RTD data through a 400M antenna in a DMR cluster communication mode, calculates the meter-level Beidou satellite positioning data and the sub-meter-level Beidou satellite positioning RTD data through the DMR communication and positioning module, obtains sub-meter-level Beidou high-precision satellite positioning data, and transmits it to the main control unit; and realizes the sub-meter-level Beidou high-precision satellite positioning function.

[0011] A2. When the DMR communication and positioning module receives and obtains meter-level Beidou satellite positioning data through the satellite positioning antenna, but cannot receive and obtain sub-meter-level Beidou satellite positioning RTD data, the meter-level Beidou satellite positioning data is directly transmitted to the main control unit through the DMR communication and positioning module; the meter-level Beidou satellite positioning function with functional degradation is realized.

[0012] A3. The main control unit receives the train driving information data transmitted by the locomotive integrated wireless communication device through the data interface D1 to realize the train driving data acquisition function; and when the DMR communication and positioning module fails and cannot realize the sub-meter-level Beidou high-precision satellite positioning and meter-level Beidou satellite positioning functions, the meter-level satellite positioning data transmitted by the locomotive integrated wireless communication device is used as the current positioning data to realize the meter-level satellite positioning function with downgraded function.

[0013] A4. The main control unit transmits the satellite positioning data and train driving data to the DMR communication and positioning module; the DMR communication and positioning module sends and reports the satellite positioning data and train driving data through the 400M antenna in the DMR cluster communication mode; and realizes the satellite positioning data and driving data reporting function.

[0014] 2. The steps of the method for realizing the data storage and downloading and synchronous reset of the locomotive integrated wireless communication device are as follows:

[0015] B1. The main control unit processor chip N5 transmits the working status information data, the communication data with the DMR communication and positioning module, and the communication data with the locomotive integrated wireless communication equipment to the first storage chip N7 through the SPIFI bus interface for storage, and at the same time transmits it to the second storage chip N8 through the SPI1 bus interface for storage; realizing the dual backup storage function of the recorded data.

[0016] B2. After connecting the external USB storage device to the USB interface U1 of the main control unit, the processor chip N5 of the main control unit reads the stored record data from the first FLASH storage chip through the SPIFI bus interface and forwards it to the external USB storage device; when the first FLASH storage chip N7 fails, the processor chip N5 reads the stored record data from the second FLASH storage chip N8 through the SPI1 bus interface and forwards it to the external USB storage device; the record data download function is realized.

[0017] B3. When operating the locomotive integrated wireless communication device to reset, the 6th pin of the data interface D1 of the main control unit continuously inputs a low-level signal for 3 seconds, the transistor VT1 is in the cut-off state, the output of the 3rd pin is high level, the transistor VT2 works in the on state, there is a driving current between the 1st pin and the 5th pin of the relay K1, the 4th pin and the 3rd pin are closed and there is no power supply output, the main control unit, the DMR communication and positioning module are powered off and reset, and the transistor VT1 and the transistor VT2 are powered by the discharge of the capacitor C49 and the capacitor C50 to maintain the reset state, and the capacitor C49 and the capacitor C50 are prevented from reverse power supply by the diode VD9; the synchronous reset function of following the locomotive integrated wireless communication device is realized.

[0018] B4. When the locomotive integrated wireless communication equipment resumes normal operation, the 6th pin of the data interface D1 of the main control unit is an open circuit input, the transistor VT1 is in the on state, the output of the 3rd pin is a low level, the transistor VT2 is in the off state, there is no driving current between the 1st pin and the 5th pin of the relay K1, the 4th pin and the 2nd pin are closed to output 13.8V power supply, the main control unit, the DMR communication and positioning module work normally, and the capacitor C49 and the capacitor C50 are charged; the function of synchronously resuming normal operation with the locomotive integrated wireless communication equipment is realized.

[0019] The technical effect of the present invention is: to meet the functional requirements of the locomotive radio station for the new generation of railway train safety protection warning system based on DMR digital cluster communication technology and sub-meter Beidou high-precision positioning technology, to realize sub-meter Beidou high-precision satellite positioning and train position information data and driving information data reporting functions, to provide train position information data and driving information data for the railway train safety protection warning system; and to have the functions of recording data storage and downloading and resetting synchronously with the locomotive integrated wireless communication equipment, which is of great significance to ensuring railway driving safety and the personal safety of construction workers and improving transportation operation efficiency. At the same time, it is also the first time at home and abroad that the DMR digital cluster communication technology and sub-meter Beidou high-precision positioning technology are combined and applied to the locomotive radio station equipment of the railway train safety protection warning system, which plays a good role in promoting and facilitating the application of Beidou positioning technology and digital intercom technology in railway communications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a circuit block diagram of the present invention;

[0021] Figure 2 for Figure 1 The schematic diagram of the power supply unit circuit;

[0022] Figure 3 for Figure 1 Schematic diagram of power conversion circuit of the central control unit;

[0023] Figure 4 for Figure 1The schematic diagram of the processor circuit of the central control unit;

[0024] Figure 5 for Figure 1 The main control unit records and stores the circuit schematic diagram;

[0025] Figure 6 for Figure 1 Schematic diagram of the data interface circuit of the central control unit;

[0026] Figure 7 for Figure 1 Schematic diagram of the USB interface circuit of the main control unit. DETAILED DESCRIPTION

[0027] In order to more clearly understand the present invention, the following is a detailed description with reference to the accompanying drawings and embodiments:

[0028] like Figure 1 As shown, a train protection and warning radio station based on DMR and Beidou positioning includes a main control unit provided with a power conversion circuit, a processor circuit, a storage circuit, a data interface circuit and a USB interface circuit, and also includes a power supply unit, a DMR communication and positioning module (model TS-X560-JX), a 400M antenna and a satellite positioning antenna; the processor circuit of the main control unit is respectively connected with the storage circuit, the data interface circuit and the USB interface circuit; the power supply unit power supply input interface P1 is connected to an external DC110V locomotive power supply, and the 8.5V power supply output interface is connected to the 8.5V power supply input interface of the DMR communication and positioning module, 13 .8V power supply output interface is connected to the 13.8V power supply input interface of the main control unit power conversion circuit, and the reset input interface RSTI is connected to the reset output interface RSTO of the data interface circuit of the main control unit; the data interface D1 of the data interface circuit of the main control unit is connected to the data 4 interface of the external locomotive integrated wireless communication equipment, and the USB interface U1 of the USB interface circuit is connected to the external USB storage device; the DMR communication and positioning module communication interface UART is connected to the serial bus interface UART2 of the main control unit processor circuit, the DMR communication antenna interface T1 is connected to the 400M antenna, and the satellite positioning antenna interface T2 is connected to the satellite positioning antenna.

[0029] The operating frequency of the 400M antenna covers 400MHz~430MHz; the operating frequency of the satellite positioning antenna covers the Beidou satellite positioning operating frequency.

[0030] like Figure 2As shown, the power supply unit includes a bridge stack VD1 of model KBJ608G, a varistor R3 of model NFC20D221K, a power module N1 of model VI-2TP-CV, a relay K1 of model G2RL-1-12VDC, a diode VD2 of model RSX301L-30, a first switching power chip N2 of model LM22670MRE-ADJ, a diode VD3 of model SS36, an inductor L1 of model NR8040T4R7 and a power supply input interface P1 for connecting an external DC110V locomotive power supply.

[0031] Pin 1 of the bridge stack VD1 is connected to pin 1 of the power supply input interface P1 and one end of the capacitor C2 and is grounded through the capacitor C1; pin 3 is connected to pin 2 of the power supply input interface P1 and the other end of the capacitor C2 and is grounded through the capacitor C3; pin 2 is connected to pin 1 of the power module N1, the positive electrode of the capacitor C6 and one end of the varistor R3 and is grounded through the capacitor C8; pin 4 is connected to pin 4 of the power module N1, the negative electrode of the capacitor C6 and the other end of the varistor R3 through the resistor R2 and is grounded through the capacitor C9; pin 5 of the power module N1 is connected to pin 6, the positive electrode of the capacitor C15, the negative electrode of the diode VD2, and the 1 of the relay K1. Pin 9 of the power module N1 is connected to pin 8, the negative electrode of capacitor C15, the other fixed end of the potentiometer RP1 and ground, and is connected to pin 7 of the power module N1 through resistor R5, grounded through capacitor C12, and pin 7 of the power module N1 is connected to the middle end of the potentiometer RP1 through resistor R6; pin 5 of the relay K1 is connected to the positive electrode of the diode VD2 and the reset input interface RSTI of the power unit, and pin 4 is connected to the 13.8V power supply output interface of the power unit.

[0032] Pin 7 of the first switching power supply chip N2 is connected to the 13.8V power supply output interface and is grounded through capacitors C4 and C5, pin 3 is grounded through resistor R1, pin 6 is grounded, pin 1 is connected to pin 8 of the first switching power supply chip N2 through capacitor C10, pin 4 is grounded through resistor R7, pin 8 is connected to the cathode of diode VD3 and one end of inductor L1, the anode of diode VD3 is grounded, the other end of inductor L1 is connected to the 8.5V power supply output interface of the power supply unit, and is connected to pin 4 of the first switching power supply chip N2 through resistor R8, and is grounded through capacitors C13 and C14.

[0033] The power supply unit performs reverse input protection on the DC110V locomotive power supply of the power supply input P1 interface through the bridge stack VD1; converts the DC110V locomotive power supply to 13.8V for powering the main control unit through the power module N1; and converts the 13.8V power supply to 8.5V for powering the DMR communication and positioning module through the first switching power supply N2.

[0034] like Figure 3 As shown, the main control unit power conversion circuit includes a second switch power chip N3 of model LM22675MRE-ADJ, an LDO power chip N4 of model SPX1117M3-L-3-3, a diode VD4 of model SS34, and an inductor L2 of model NR8040T4R7.

[0035] Pin 7 of the second switching power supply chip N3 is connected to the 13.8V power supply input interface and is grounded through capacitors C16 and C17, pin 3 is grounded through resistor R10, pin 6 is grounded, pin 1 is connected to pin 8 of the second switching power supply chip N3 through capacitor C21, pin 4 is grounded through resistor R12, pin 8 is connected to the negative electrode of diode VD4 and one end of inductor L2, the positive electrode of diode VD4 is grounded, the other end of inductor L2 is connected to the 5V power supply interface, and is connected to pin 4 of the second switching power supply chip N3 through resistor R13, and is grounded through capacitors C23 and C24; pin 3 of the LDO power supply chip N4 is connected to the 5V power supply interface and is grounded through capacitors C18 and C19, pin 1 is grounded, and pin 2 is connected to the 3.3V power supply interface and is grounded through capacitors C20 and C22.

[0036] The power conversion circuit converts the 13.8V power supply into 5V power supply for the main control unit through the second switch power supply chip N3; and converts the 5V power supply into 3.3V power supply for the main control unit through the LDO power supply chip N4.

[0037] like Figure 4 As shown, the processor circuit includes a processor chip N5 with a model number of LPC4325JBD144, a processor low power supervision chip N6 with a model number of SP809EK-L-2-6 / TR, a magnetic bead L3 with a model number of BLM21P221SN, and a 12MHz passive crystal oscillator G1.

[0038] The 25th, 59th, 94th, 131st, 5th, 36th, 41st, 71st, 77th, 107th, 111th, 141st, 17th, 16th and 127th pins of the processor chip N5 are connected to the 3.3V power supply interface and are grounded through capacitors C26 to C40 respectively. The 28th and 96th pins are connected to the 3.3V power supply interface through resistors R14 and R19 respectively. The 24th, 42nd, 43rd, 98th and 102nd pins are connected to the 3.3V power supply interface through resistors R15, R17, R18, R20 and R21 respectively. Pin 21 is grounded, pins 23, 19, 135, 4, 40, 76, and 109 are grounded, pin 137 is connected to the 3.3V power supply interface through the magnetic bead L3, pins 12 and 13 are respectively connected to the two ends of the passive crystal oscillator G1, and are grounded through capacitors C41 and C42 respectively; pin 1 of the processor low power supervision chip N6 is grounded, pin 3 is connected to the 3.3V power supply interface, and is grounded through capacitor C25, pin 2 is connected to pin 128 of the processor chip N5, and is connected to the 3.3V power supply interface through resistor R16, and is grounded through capacitor C45.

[0039] The processor chip N5 communicates data with the DMR communication and positioning module through the serial bus interface UART2.

[0040] like Figure 5 As shown, the storage circuit includes a first FLASH storage chip N7 and a second FLASH storage chip N8, both of which are MX66L51235FZ2I; the 8th pin of the first FLASH storage chip N7 is connected to the 3.3V power supply interface and is grounded through a capacitor C46, ​​the 4th pin is grounded, and the 1st pin, the 2nd pin, the 3rd pin, the 5th pin, the 6th pin, and the 9th pin are respectively connected to the 124th pin, the 122nd pin, the 121st pin, the 123rd pin, the 118th pin, and the 119th pin of the processor chip N5; the 8th pin of the second FLASH storage chip N8 is connected to the 3.3V power supply interface and is grounded through a capacitor C47, the 3rd pin and the 4th pin are grounded, and the 1st pin, the 2nd pin, the 5th pin, the 6th pin, and the 9th pin are respectively connected to the 48th pin, the 44th pin, the 47th pin, the 68th pin, and the 70th pin of the processor chip N5.

[0041] The processor chip N5 communicates with the first FLASH storage chip N7 through the SPI1 bus interface to store and read the recorded data, and communicates with the second FLASH storage chip N8 through the SPI1 bus interface to store and read the recorded data.

[0042] like Figure 6As shown, the data interface circuit includes an RS422 interface chip N9 of model MAX490E, TVS tubes VD5 to VD8 of model SMBJ6.5CA, gas discharge tubes GS1 and GS2 of model B3D090L, transistors VT1 and VT2 of model BC817-16, and diode VD9 of model BAS40; Pin 1 of the RS422 interface chip N9 is connected to the 5V power supply interface and is grounded through a capacitor C48, pin 4 is grounded, pins 2 and 3 are respectively connected to pins 61 and 60 of the processor chip N5, pin 5 is connected to pin 2 of the data interface D1 of the main control unit, and is grounded through the TVS tube VD5 and one end of the gas discharge tube GS1, pin 6 is connected to pin 3 of the data interface D1 of the main control unit, and is grounded through the TVS tube VD6 and the other end of the gas discharge tube GS1, and pin 7 is connected to pin 8 of the data interface D1 of the main control unit. The pin 1 of the transistor VT1 is connected to the pin 5 of the data interface D1 of the main control unit, and is grounded through a resistor R23, a TVS tube VD7 and one end of the gas discharge tube GS2, the pin 8 is connected to the pin 4 of the data interface D1 of the main control unit, and is connected to the 5V power supply interface through a resistor R24, and is grounded through the other end of the TVS tube VD8 and the gas discharge tube GS2; the pin 1 of the transistor VT1 is connected to the pin 6 of the data interface D1 of the main control unit, and is connected to the cathode of the diode VD9 and the anode of the capacitor C49 and the anode of the capacitor C50 through a resistor R26, the pin 2 is grounded, the pin 3 is connected to the pin 1 of the transistor VT2, and is connected to the cathode of the diode VD9 through a resistor R25; the pin 2 of the transistor VT2 is grounded, and the pin 3 is connected to the reset output interface RSTO of the data interface circuit through a resistor R22; the anode of the diode VD9 is connected to the 3.3V power supply interface; the cathode of the capacitor C49 and the capacitor C50 is grounded.

[0043] The data interface circuit performs level conversion between the serial port and the RS422 bus interface through the RS422 interface chip N9. The processor chip N5 performs data communication with the locomotive integrated communication equipment through the RS422 interface chip N9. The RS422 bus interface is protected by TVS tubes VD5 to VD8 and gas discharge tubes GS1 and GS2. The reset signal is accessed and the switching of the relay K1 is controlled through transistors VT1 and VT2 and capacitors C49 and C50.

[0044] The USB interface circuit manages and protects the USB interface power supply through the USB power supply management chip N10; and provides anti-static protection for the USB interface through the integrated ESD protection chip N11.

[0045] like Figure 7As shown, the USB interface circuit includes a USB power management chip N10 of model TPS2530 and an integrated ESD protection chip N11 of model PRTR5V0U4D; pin 5 of the USB power management chip N10 is connected to pin 21 of the processor chip N5 and grounded through a capacitor C51, pin 3 is connected to pin 81 of the processor chip N5, and connected to pin 5 of the USB power management chip N10 through a resistor R27, pin 4 is connected to pin 75 of the processor chip N5, pin 1 is connected to pin 1 of the main control unit USB interface U1, and pin 2 is grounded; pin 1, pin 6, and pin 5 of the integrated ESD protection chip N11 are respectively connected to pin 3, pin 2, and pin 1 of the main control unit USB interface U1, and pin 2 is grounded; pin 2 and pin 3 of the main control unit USB interface U1 are respectively connected to pin 20 and pin 18 of the processor chip N5, and pin 4 is grounded.

[0046] The implementation method of the present invention comprises: a satellite positioning data and driving data acquisition and reporting implementation method, a record data storage and downloading implementation method and a synchronous reset implementation method of a locomotive integrated wireless communication device.

[0047] 1. The steps for obtaining and reporting satellite positioning data and driving data are as follows:

[0048] A1. The DMR communication and positioning module receives and obtains meter-level Beidou satellite positioning data through the satellite positioning antenna, and receives and obtains sub-meter-level Beidou satellite positioning RTD data through the 400M antenna in DMR cluster communication mode. The DMR communication and positioning module calculates the meter-level Beidou satellite positioning data and the sub-meter-level Beidou satellite positioning RTD data to obtain sub-meter-level Beidou high-precision satellite positioning data, and transmits it to the main control unit; realizing the sub-meter-level Beidou high-precision satellite positioning function.

[0049] A2. When the DMR communication and positioning module receives and obtains meter-level Beidou satellite positioning data through the satellite positioning antenna, but cannot receive and obtain sub-meter-level Beidou satellite positioning RTD data, the meter-level Beidou satellite positioning data is directly transmitted to the main control unit through the DMR communication and positioning module, thereby realizing the meter-level Beidou satellite positioning function with functional downgrade.

[0050] A3. The main control unit receives and obtains the train driving information data transmitted by the locomotive integrated wireless communication equipment through the data interface D1, including the locomotive number, train number, line code, kilometer mark, driving speed, and meter-level satellite positioning data; realizes the train driving data acquisition function; and when the DMR communication and positioning module fails and the sub-meter-level Beidou high-precision satellite positioning and meter-level Beidou satellite positioning functions cannot be realized, the meter-level satellite positioning data transmitted by the locomotive integrated wireless communication equipment is used as the current positioning data to realize the meter-level satellite positioning function with downgraded function.

[0051] A4. The main control unit transmits the satellite positioning data and train driving data to the DMR communication and positioning module; the DMR communication and positioning module sends and reports the satellite positioning data and train driving data through the 400M antenna in the DMR cluster communication mode, realizing the satellite positioning data and driving data reporting function.

[0052] 2. The steps for recording data storage and downloading and synchronously resetting the locomotive integrated wireless communication equipment are as follows:

[0053] B1, the main control unit processor chip N5 transmits the working status information data, the communication data with the DMR communication and positioning module, and the communication data with the locomotive integrated wireless communication equipment to the first storage chip N7 through the SPIFI bus interface for storage, and at the same time transmits it to the second storage chip N8 through the SPI1 bus interface for storage; realizing the dual backup storage function of the recorded data.

[0054] B2. After connecting the external USB storage device to the USB interface U1 of the main control unit, the processor chip N5 of the main control unit reads the stored record data from the first FLASH storage chip through the SPIFI bus interface and forwards it to the external USB storage device; when the first FLASH storage chip N7 fails, the processor chip N5 reads the stored record data from the second FLASH storage chip N8 through the SPI1 bus interface and forwards it to the external USB storage device; the record data download function is realized.

[0055] B3. When operating the locomotive integrated wireless communication device to reset, the 6th pin of the main control unit data interface D1 continuously inputs a low-level signal for 3 seconds, the transistor VT1 is in the cut-off state, the 3rd pin is at a high level, the transistor VT2 is in the on state, there is a driving current between the 1st and 5th pins of the relay K1, the 4th and 3rd pins are closed and there is no power output, the main control unit, the DMR communication and positioning module are powered off and reset, and the capacitors C49 and C50 are discharged to provide power to the transistors VT1 and VT2 to maintain the reset state, and the diode VD9 is used to prevent the capacitors C49 and C50 from reversely supplying power to other circuits; the synchronous reset function of following the locomotive integrated wireless communication device is realized.

[0056] B4. When the locomotive integrated wireless communication equipment resumes normal operation, pin 6 of the main control unit data interface D1 is an open circuit input, transistor VT1 is in the on state, pin 3 outputs a low level, transistor VT2 is in the off state, there is no driving current between pins 1 and 5 of relay K1, pins 4 and 2 are closed to output 13.8V power supply, the main control unit, DMR communication and positioning modules work normally, and capacitors C49 and C50 are charged; the function of synchronously resuming normal operation following the locomotive integrated wireless communication equipment is realized.

Claims

1. A method for implementing a train protection warning station based on DMR and Beidou positioning, characterized in that: The implementation method includes: a method for acquiring and reporting satellite positioning data and driving data, a method for recording data storage and downloading, and a method for synchronously resetting the integrated wireless communication device following the locomotive; 1. The steps of the satellite positioning data and driving data acquisition and reporting method are as follows: A1. The digital mobile radio DMR communication and positioning module receives and obtains meter-level Beidou satellite positioning data through a satellite positioning antenna, receives and obtains sub-meter-level Beidou satellite positioning RTD data through a 400M antenna in a DMR cluster communication mode, calculates the meter-level Beidou satellite positioning data and the sub-meter-level Beidou satellite positioning RTD data through the digital mobile radio DMR communication and positioning module, obtains sub-meter-level Beidou high-precision satellite positioning data, and transmits it to the main control unit; realizes the sub-meter-level Beidou high-precision satellite positioning function; A2, when the digital mobile radio DMR communication and positioning module receives and obtains meter-level Beidou satellite positioning data through the satellite positioning antenna, but cannot receive and obtain sub-meter-level Beidou satellite positioning RTD data, the meter-level Beidou satellite positioning data is directly transmitted to the main control unit through the digital mobile radio DMR communication and positioning module; the meter-level Beidou satellite positioning function with functional degradation is realized; A3, the main control unit receives and obtains the train driving information data transmitted by the locomotive integrated wireless communication device through the data interface D1, and realizes the train driving data acquisition function; and when the digital mobile radio DMR communication and positioning module fails and cannot realize the sub-meter-level Beidou high-precision satellite positioning and meter-level Beidou satellite positioning functions, the meter-level satellite positioning data transmitted by the locomotive integrated wireless communication device is used as the current positioning data to realize the meter-level satellite positioning function with functional degradation; A4, the main control unit transmits the satellite positioning data and the train driving data to the digital mobile radio DMR communication and positioning module; the digital mobile radio DMR communication and positioning module sends and reports the satellite positioning data and the train driving data in the DMR cluster communication mode through the 400M antenna; realizes the satellite positioning data and driving data reporting function; 2. The steps of the method for realizing the data storage and downloading and synchronous reset of the locomotive integrated wireless communication device are as follows: B1, the main control unit processor chip N5 transmits the working status information data, the communication data with the digital mobile radio DMR communication and positioning module, and the communication data with the locomotive integrated wireless communication device to the first storage chip N7 through the SPIFI bus interface for storage, and at the same time transmits it to the second storage chip N8 through the SPI1 bus interface for storage; realizes the dual backup storage function of the recorded data; B2. After the external USB storage device is connected to the USB interface U1 of the main control unit, the processor chip N5 of the main control unit reads the stored record data from the first FLASH storage chip through the SPIFI bus interface and forwards it to the external USB storage device; when the first FLASH storage chip N7 fails, the processor chip N5 reads the stored record data from the second FLASH storage chip N8 through the SPI1 bus interface and forwards it to the external USB storage device; the record data download function is realized; B3. When resetting the locomotive integrated wireless communication device, the 6th pin of the data interface D1 of the main control unit continuously inputs a low-level signal for 3 seconds, the transistor VT1 is in the cut-off state, the output of the 3rd pin is high level, the transistor VT2 works in the on state, there is a driving current between the 1st pin and the 5th pin of the relay K1, the 4th pin and the 3rd pin are closed and there is no power supply output, the main control unit, the digital mobile radio DMR communication and positioning module are powered off and reset, and the transistor VT1 and the transistor VT2 are powered on to maintain the reset state through the discharge of the capacitor C49 and the capacitor C50, and the capacitor C49 and the capacitor C50 are prevented from reverse power supply through the diode VD9; the synchronous reset function of the locomotive integrated wireless communication device is realized; B4. When the locomotive integrated wireless communication equipment resumes normal operation, the 6th pin of the data interface D1 of the main control unit is an open circuit input, the transistor VT1 is in the on state, the output of the 3rd pin is a low level, the transistor VT2 is in the off state, there is no driving current between the 1st pin and the 5th pin of the relay K1, the 4th pin and the 2nd pin are closed to output 13.8V power supply, the main control unit, the digital mobile radio DMR communication and positioning module work normally, and the capacitor C49 and the capacitor C50 are charged; the function of synchronously resuming normal operation with the locomotive integrated wireless communication equipment is realized.

2. The method for implementing the train protection warning station based on DMR and Beidou positioning according to claim 1 is characterized in that: The train protection warning station in the implementation method includes a main control unit provided with a power conversion circuit, a processor circuit, a storage circuit, a data interface circuit and a USB interface circuit, and also includes a power supply unit, a digital mobile radio DMR communication and positioning module, a 400M antenna and a satellite positioning antenna; The main control unit processor circuit is connected to the storage circuit, the data interface circuit and the USB interface circuit respectively; The power supply unit power supply input interface P1 is connected to the external DC110V locomotive power supply, the 8.5V power supply output interface is connected to the 8.5V power supply input interface of the DMR communication and positioning module, the 13.8V power supply output interface is connected to the 13.8V power supply input interface of the main control unit power conversion circuit, and the reset input interface RSTI is connected to the reset output interface RSTO of the main control unit data interface circuit; The data interface D1 of the data interface circuit of the main control unit is connected to the data interface 4 of the external locomotive integrated wireless communication device, and the USB interface U1 of the USB interface circuit is connected to the external USB storage device; The DMR communication and positioning module communication interface UART is connected to the serial bus interface UART2 of the main control unit processor circuit, the DMR communication antenna interface T1 is connected to the 400M antenna, and the satellite positioning antenna interface T2 is connected to the satellite positioning antenna.

3. The method for implementing the train protection warning station based on DMR and Beidou positioning according to claim 2 is characterized in that: The power supply unit includes a bridge rectifier VD1 of model KBJ608G, a power module N1 of model VI-2TP-CV, a relay K1 of model G2RL-1-12VDC, a first switch power chip N2 of model LM22670MRE-ADJ and a power supply input interface P1 for connecting an external DC110V locomotive power supply; Pin 1 of the bridge stack VD1 is connected to pin 1 of the power supply input interface P1 and one end of the capacitor C2 and is grounded through the capacitor C1; pin 3 is connected to pin 2 of the power supply input interface P1 and the other end of the capacitor C2 and is grounded through the capacitor C3; pin 2 is connected to pin 1 of the power module N1, the positive electrode of the capacitor C6 and one end of the varistor R3 and is grounded through the capacitor C8; pin 4 is connected to pin 4 of the power module N1, the negative electrode of the capacitor C6 and the other end of the varistor R3 through the resistor R2 and is grounded through the capacitor C9; pin 5 of the power module N1 is connected to pin 6, the positive electrode of the capacitor C15, the negative electrode of the diode VD2, and the relay K1. Pin 1 and pin 2 of the power module N1 are connected to pin 7 of the power module N1 through a resistor R4, connected to a fixed end of the potentiometer RP1 through a resistor R9, and grounded through a capacitor C11; pin 9 of the power module N1 is connected to pin 8, the negative electrode of the capacitor C15, the other fixed end of the potentiometer RP1 and the ground, and connected to pin 7 of the power module N1 through a resistor R5, grounded through a capacitor C12, and pin 7 of the power module N1 is connected to the middle end of the potentiometer RP1 through a resistor R6; pin 5 of the relay K1 is connected to the positive electrode of the diode VD2 and the reset input interface RSTI of the power unit, and pin 4 is connected to the 13.8V power supply output interface of the power unit; Pin 7 of the first switching power supply chip N2 is connected to the 13.8V power supply output interface and is grounded through capacitors C4 and C5, pin 3 is grounded through resistor R1, pin 6 is grounded, pin 1 is connected to pin 8 of the first switching power supply chip N2 through capacitor C10, pin 4 is grounded through resistor R7, pin 8 is connected to the cathode of diode VD3 and one end of inductor L1, the anode of diode VD3 is grounded, the other end of inductor L1 is connected to the 8.5V power supply output interface of the power supply unit, and is connected to pin 4 of the first switching power supply chip N2 through resistor R8, and is grounded through capacitors C13 and C14.

4. The method for implementing the train protection warning station based on DMR and Beidou positioning according to claim 3 is characterized in that: The power conversion circuit of the main control unit includes a second switching power chip N3 with a model number of LM22675MRE-ADJ and an LDO power chip N4 with a model number of SPX1117M3-L-3-3; pin 7 of the second switching power chip N3 is connected to a 13.8V power supply input interface and is grounded through capacitors C16 and C17, pin 3 is grounded through resistors R10, pin 6 is grounded, pin 1 is connected to pin 8 of the second switching power chip N3 through capacitor C21, pin 4 is grounded through resistor R12, pin 8 is connected to the negative electrode of diode VD4 and one end of inductor L2, the positive electrode of diode VD4 is grounded, the other end of inductor L2 is connected to a 5V power supply interface, and is connected to pin 4 of the second switching power chip N3 through resistor R13, and is grounded through capacitors C23 and C24; pin 3 of the LDO power chip N4 is connected to a 5V power supply interface and is grounded through capacitors C18 and C19, pin 1 is grounded, and pin 2 is connected to a 3.3V power supply interface and is grounded through capacitors C20 and C22.

5. The method for implementing a train protection warning station based on DMR and Beidou positioning according to claim 4 is characterized in that: The processor circuit includes a processor chip N5 of model LPC4325JBD144 and a processor low power monitoring chip N6 of model SP809EK-L-2-6 / TR; The 25th, 59th, 94th, 131st, 5th, 36th, 41st, 71st, 77th, 107th, 111th, 141st, 17th, 16th, and 127th pins of the processor chip N5 are connected to the 3.3V power supply interface and are grounded through capacitors C26 to C40 respectively, the 28th and 96th pins are connected to the 3.3V power supply interface through resistors R14 and R19 respectively, the 24th, 42nd, 43rd, 98th, and 102nd pins are connected to the 3.3V power supply interface through resistors R15, R17, R18, R20, and R21 respectively. 1 is grounded, pins 23, 19, 135, 4, 40, 76 and 109 are grounded, pin 137 is connected to the 3.3V power supply interface through a magnetic bead L3, pins 12 and 13 are respectively connected to the two ends of the passive crystal oscillator G1, and are respectively grounded through capacitors C41 and C42; pin 1 of the processor low power supervision chip N6 is grounded, pin 3 is connected to the 3.3V power supply interface, and is grounded through capacitor C25, pin 2 is connected to pin 128 of the processor chip N5, and is connected to the 3.3V power supply interface through resistor R16, and is grounded through capacitor C45.

6. The method for implementing a train protection and warning station based on DMR and Beidou positioning according to claim 5 is characterized in that: The storage circuit includes a first FLASH storage chip N7 and a second FLASH storage chip N8, both of which are MX66L51235FZ2I; the 8th pin of the first FLASH storage chip N7 is connected to a 3.3V power supply interface and is grounded through a capacitor C46, ​​the 4th pin is grounded, and the 1st, 2nd, 3rd, 5th, 6th and 9th pins are respectively connected to the 124th, 122nd, 121st, 123rd, 118th and 119th pins of the processor chip N5; the 8th pin of the second FLASH storage chip N8 is connected to a 3.3V power supply interface and is grounded through a capacitor C47, the 3rd and 4th pins are grounded, and the 1st, 2nd, 5th, 6th and 9th pins are respectively connected to the 48th, 44th, 47th, 68th and 70th pins of the processor chip N5.

7. The method for implementing a train protection and warning station based on DMR and Beidou positioning according to claim 6 is characterized in that: The data interface circuit includes an RS422 interface chip N9 of model MAX490E, and transistors VT1 and VT2 of model BC817-16; Pin 1 of the RS422 interface chip N9 is connected to a 5V power supply interface and is grounded through a capacitor C48, Pin 4 is grounded, Pins 2 and 3 are respectively connected to Pins 61 and 60 of a processor chip N5, Pin 5 is connected to Pin 2 of a data interface D1 of a main control unit, and is grounded through one end of a TVS tube VD5 and a gas discharge tube GS1, Pin 6 is connected to Pin 3 of the data interface D1 of the main control unit, and is grounded through the other end of a TVS tube VD6 and a gas discharge tube GS1, Pin 7 is connected to Pin 5 of the data interface D1 of the main control unit, and is grounded through a resistor R23, a TVS tube VD7 and a gas discharge tube One end of GS2 is grounded, and pin 8 is connected to pin 4 of the data interface D1 of the main control unit, and is connected to the 5V power supply interface through resistor R24, and is grounded through TVS tube VD8 and the other end of the gas discharge tube GS2; pin 1 of the transistor VT1 is connected to pin 6 of the data interface D1 of the main control unit, and is connected to the cathode of diode VD9 and the positive electrodes of capacitors C49 and C50 through resistor R26, pin 2 is grounded, and pin 3 is connected to pin 1 of the transistor VT2, and is connected to the cathode of diode VD9 through resistor R25; pin 2 of the transistor VT2 is grounded, and pin 3 is connected to the reset output interface RSTO of the data interface circuit through resistor R22; the anode of diode VD9 is connected to the 3.3V power supply interface; the cathodes of capacitors C49 and C50 are grounded.

8. The method for implementing the train protection warning station based on DMR and Beidou positioning according to claim 7 is characterized in that: The USB interface circuit includes a USB power management chip N10 of model TPS2530 and an integrated ESD protection chip N11 of model PRTR5V0U4D; Pin 5 of the USB power management chip N10 is connected to Pin 21 of the processor chip N5 and grounded through a capacitor C51, Pin 3 is connected to Pin 81 of the processor chip N5 and connected to Pin 5 of the USB power management chip N10 through a resistor R27, Pin 4 is connected to Pin 75 of the processor chip N5, Pin 1 is connected to Pin 1 of the USB interface U1 of the main control unit, and Pin 2 is grounded; Pins 1, 6 and 5 of the integrated ESD protection chip N11 are connected to pins 3, 2 and 1 of the main control unit USB interface U1 respectively, and pin 2 is grounded; pins 2 and 3 of the main control unit USB interface U1 are connected to pins 20 and 18 of the processor chip N5 respectively, and pin 4 is grounded.

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