CN112671429A

CN112671429A - Transponder transmission system

Info

Publication number: CN112671429A
Application number: CN202110038310.2A
Authority: CN
Inventors: 范文龙
Original assignee: Shanxi Runzefeng Technology Co ltd
Current assignee: Shanxi Runzefeng Technology Co ltd
Priority date: 2021-01-12
Filing date: 2021-01-12
Publication date: 2021-04-16

Abstract

The invention discloses a transponder transmission system, which comprises two parts, namely vehicle-mounted equipment and ground equipment, wherein the vehicle-mounted equipment comprises an antenna unit and a transponder transmission module, the ground equipment comprises a transponder and a ground electronic unit, the transponder transmission module continuously radiates energy to the ground through the antenna unit, the transponder receives the power radiated by the antenna unit, the transponder sends internal coded information to the transponder transmission module, and the transponder transmission module sends the received data information to a vehicle-mounted host unit. The invention has the advantages that: the system is a safety point type information transmission system, safety information is transmitted from ground equipment to vehicle-mounted equipment through a transponder, information is transmitted from the ground equipment to the vehicle-mounted equipment through the transponder by a BTM, and an information transmission channel between the transponder and the vehicle-mounted equipment is formed when an antenna unit passes through or stops above the transponder; separate antenna elements are provided for transmitting energy and receiving signals.

Description

Transponder transmission system

Technical Field

The invention relates to a transponder transmission system, and belongs to the technical field of transponder transmission.

Background

On the existing high-speed rail and passenger dedicated line, a ground transponder (for short, transponder) is usually laid on a sleeper in the middle of a rail to transmit information such as positioning information, line parameters, track circuit parameters, signal point types, temporary speed limit, access and the like to train operation control. In order to ensure the safety and the availability of high-speed and high-density train tracking operation, the train control vehicle-mounted equipment needs to acquire complete and correct ground route information in real time in the high-speed operation process.

The responder transmission host receives the uplink signal sent by the responder, and restores the responder message and outputs the responder message through the processing steps of demodulation, decoding, communication and the like. In the above processing, the receiving and demodulating steps rely on the encoding mode of the message to ensure the data security, and the communication step relies on the secure communication protocol and the secure data packet to ensure the data security. Only during decoding processing, the message data needs to be stripped from the check code and processed, so that the protection of the security of the data in the decoding processing is the core of the security architecture design. In order to realize the functions of processing and transmitting the transponder message, the point type transponder transmission host needs to carry out special safety design on the host, and at present, circuits of all manufacturers in the transponder transmission host are complex and have low safety. Based on the above situation, there is a need for a transponder transmission host capable of ensuring the security of the transmitted data.

Disclosure of Invention

The invention aims to solve the technical problem of providing a transponder transmission system which provides point information for train operation, realizes the function of fixed-point positioning and has high safety.

The invention is realized by the following scheme: a transponder transmission system comprises two parts, namely vehicle-mounted equipment and ground equipment, wherein the vehicle-mounted equipment comprises an antenna unit and a transponder transmission module, the ground equipment comprises a transponder and a ground electronic unit, the transponder transmission module continuously radiates energy to the ground through the antenna unit, the transponder receives the power radiated by the antenna unit, the transponder sends internal coded information to the transponder transmission module, and the transponder transmission module sends the received data information to a vehicle-mounted host unit.

The transponder comprises a passive transponder and an active transponder, and the coded information of the ground electronic unit is transmitted to the transponder transmission module through the active transponder.

The ground electronics unit transmits information to a train control center or other device.

The transponder transmission module consists of a control panel, an output panel, a receiving panel, a power panel, a communication panel, a recording panel and a D cable.

The control board is a control core of the system, the messages transmitted by the responder are restored into user messages, and the control board receives the two paths of TA, CP and TK transmitted by the receiving board and analyzes the messages; the control board sends a starting pulse to a self-checking starting circuit on the receiving board; the control board controls the switch of the energy signal of the output board and receives the self-checking FSK data from the antenna unit by receiving the self-checking data sent by the output board, so that the self-checking of the whole function of the BTM is realized.

The output board generates a downlink energy signal, outputs the downlink energy signal to the antenna unit through the D cable, receives an A1 interface signal received by the antenna unit, is internally provided with a scattering sheet, outputs information detected by the state detection and the output port of the output board, and outputs the information to the control board for processing.

The receiving board A1 interface signal filtering, shaping and FSK signal demodulation are responsible for the level conversion of the production self-checking trigger signal, the demodulation function of the receiving board is designed to be a redundant double set of hardware, and two TA signals, two CP signals and two TK signals are provided for the control board.

Rated input of the power panel is DC 110V, DC 24V and DC 5V are output, an input DC 110V power supply is protected by a protection circuit and filtered by a filter circuit, and is isolated and converted by two DC-DC modules and then is output with DC 24V and DC 5V, wherein fuses are added to two paths of power supplies of the output panel.

The communication board realizes a physical carrier for communication between the transponder transmission module and the vehicle-mounted host unit; the communication interface is adapted to dual redundant CAN and RS-422 communication interfaces.

The recording board is responsible for recording the error rate detection function and key input, processing and output operation information and fault information in the operation process of the equipment, and is also responsible for sending all maintenance information, and the communication and connection between the recording board and other board cards are isolated in a physical isolation mode.

The invention has the beneficial effects that:

1. the invention relates to a transponder transmission system, in particular to a safety point type information transmission system, which realizes that ground equipment transmits safety information to vehicle-mounted equipment through a transponder, realizes that the ground equipment transmits information to the vehicle-mounted equipment through the transponder by a BTM (Business card reader), and forms an information transmission channel between the transponder and the vehicle-mounted equipment when an antenna unit passes through or stops above the transponder;

2. the BTM system of the transponder transmission system of the invention has the main functions as follows: generating correct radio frequency energy signals, detecting an uplink responder, filtering and demodulating the uplink signals, performing a physical crosstalk protection function, performing physical protection of sidelobe transmission, managing data and position influence by sidelobe effect, immunizing environmental noise, checking uplink input data according to decoding requirements, detecting message type and decoding, extracting user data, filtering messages, processing uplink message conversion when passing through the responder, outputting a timestamp and/or a mile stamp of the data, supporting responder positioning and an error code detection function;

3. the transponder transmission system of the present invention has separate antenna units for transmitting energy and receiving signals because the information interaction between the BTM system and the transponder is based on rfid technology.

Drawings

Fig. 1 is a schematic structural diagram of a transponder transmission system according to the present invention.

Fig. 2 is a schematic structural diagram of an on-board device of a transponder transmission system according to the present invention.

Fig. 3 is a schematic structural diagram of a transponder transmission module of a transponder transmission system according to the present invention.

Fig. 4 is a schematic structural diagram of a control board of a transponder transmission system according to the present invention.

Fig. 5 is a schematic structural diagram of an output board of a transponder transmission system according to the present invention.

Fig. 6 is a schematic structural diagram of a receiving board of a transponder transmission system according to the present invention.

Fig. 7 is a schematic structural diagram of a power panel of a transponder transmission system according to the present invention.

Fig. 8 is a schematic structural diagram of an RS-422 communication board of a transponder transmission system according to the present invention.

Fig. 9 is a schematic structural diagram of a CAN communication board of a transponder transmission system according to the present invention.

Fig. 10 is a schematic structural diagram of a recording plate of a transponder transmission system of the present invention.

Detailed Description

The invention is further described below with reference to fig. 1-10, without limiting the scope of the invention.

In the following description, for purposes of clarity, not all features of an actual implementation are described, well-known functions or constructions are not described in detail since they would obscure the invention with unnecessary detail, it being understood that in the development of any actual embodiment, numerous implementation details must be set forth in order to achieve the developer's specific goals, such as compliance with system-related and business-related constraints, changing from one implementation to another, and it being recognized that such development effort might be complex and time consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art.

A transponder transmission system comprises two parts, namely a vehicle-mounted device and a ground device, wherein the vehicle-mounted device comprises an Antenna Unit (AU) and a transponder transmission module (BTM), the ground device comprises a transponder and a ground electronic unit (LEU), the transponder transmission module (BTM) continuously radiates energy to the ground through the Antenna Unit (AU), the transponder receives the power radiated by the antenna unit, the transponder sends internal coded information to the transponder transmission module (BTM), and the transponder transmission module (BTM) sends the received data information to a vehicle-mounted host unit.

The transponder comprises a passive transponder and an active transponder, by means of which the coded information of the surface electronic unit (LEU) is transmitted to the transponder transmission module (BTM).

The surface electronics unit (LEU) transmits information to a column control center or other device.

The transponder transmission module (BTM) is composed of a control board, an output board, a receiving board, a power board, a communication board, a recording board and a D cable.

The control board is a control core of the system, the messages transmitted by the responder are restored into user messages, and the control board receives the two paths of TA, CP and TK transmitted by the receiving board and analyzes the messages; the control board sends a starting pulse to a self-checking starting circuit on the receiving board; the control panel realizes the self-checking of the whole functions of the BTM by receiving the self-checking data sent by the output panel, controlling the switch of the energy signal of the output panel and receiving the self-checking FSK data from the antenna unit, wherein the control panel is internally provided with two-out-of-two transponder transmission module management software, adopts a two-out-of-two architecture mode, and completes the receiving and decoding of the FSK signal through two CPUs and two FPAGs. The core of the control board is a CPU, the CPU realizes the communication with the vehicle-mounted host unit through a communication board, and each CPU receives two paths of receiving channel data of the communication board. The two CPUs are respectively connected with the FPGA through EMIF and state signals, so that high-speed communication and real-time state monitoring are realized. And the data interaction between the two CPUs is realized through SSI between the FPGAs. The FPGA-A and the FPGA-B respectively receive the two paths of FSK signals and the over-point signals transmitted by the receiving board. The two FPGAs finish the decoding of the message, the message is restored to the user message, and the CPU reads the decoded user message by reading the data in the cache region of the FPGA. The CPU outputs a self-checking trigger signal, a switch output board signal and a CD signal through the FPGA; and the CPU reads the monitoring state information of the output board by reading the cache region of the FPGA. The on-line monitoring data of the board card of the control board is also directly monitored by the CPU and comprises the information of the temperature and the voltage of the board card. CPU sends control panel running state and control panel monitoring information to the record board with SPI communication mode and carries out the record, and the control panel realizes control panel CPU program configuration through maintaining the interface, the output board produces the energy signal that passes down, and through D cable output to antenna unit, the A1 interface signal that receiving antenna unit received simultaneously, be equipped with the scattering piece in the output board, the output board has the information output that detects self state and output port detection to export the control panel handles.

The demodulation function of the receiving board is designed into a redundant double set of hardware, and two paths of TA signals (data), two paths of CP signals (clock) and two paths of TK signals (over-point) are provided for the control board. Receiving the FSK signal transmitted from the output plate. Receiving a self-checking signal of a control board, then carrying out level conversion, sending 24V negative pulses to an output board, and sending an FSK signal before demodulation to a recording board; d2 signal strength indication is output to the recording board through the SPI, and the receiver board sends FPGA's operating condition to the control panel, and receiver board FPGA can reset through the reset signal of control panel output simultaneously.

Rated input of the power panel is DC 110V, DC 24V and DC 5V are output, an input DC 110V power supply is protected by a protection circuit and filtered by a filter circuit, and is isolated and converted by two DC-DC modules and then is output with DC 24V and DC 5V, wherein fuses are added to two paths of power supplies of the output panel, the output power supplies respectively supply power for five board cards, and the DC 24V power supply supplies power for a control panel, a receiving panel, a communication panel, a recording panel and the output panel; and the DC 5V supplies power for the control board, the receiving board, the communication board, the recording board and the output board. Special power supply treatment should be performed in the power supply: firstly, inputting DC 24V and DC 5V of an output board to the output board after a power supply board passes through a fuse; secondly, the output plate DC 24V is used as an analog circuit; DC 5V is used as a communication circuit; thirdly, two DC 5V paths and two DC 24V paths are arranged inside the control panel, wherein the DC 5V is used for communication after isolation; receiving board 1

DC

5V and 1 DC 24V; two DC 5V communication boards respectively supply power to two communication channels, and 1 DC 24V communication board is recorded; DC 24V in the four receiving boards is only used as a self-checking trigger signal power supply; the receiver board circuit is powered using a DC 5V power supply.

The communication board implements a physical carrier for a transponder transmission module (BTM) to communicate with an in-vehicle host unit; the communication interface is adapted to dual-redundancy CAN and RS-422 communication interfaces, the RS-422 communication board card is composed of six RS-422 channels and an isolation circuit, and the two redundancy channels are realized. The RS-422 passes through the RS-422 transceiver circuit, then is isolated, and then is output to the control board and the recording board. Meanwhile, two paths of CD signals (passing point signals) are respectively output to the vehicle-mounted host unit after being isolated. The CAN communication board card is composed of six CAN transceiving circuits and an isolation circuit respectively, and two paths of redundancy are realized. The CAN communication passes through the CAN transceiver circuit, then is isolated, and then is output to the control panel and the recording board. Meanwhile, two paths of CD signals (passing point signals) are respectively output to the vehicle-mounted host unit after being isolated.

The recording board is responsible for recording the error rate detection function and key input, processing and output operation information and fault information in the operation process of the equipment, and is also responsible for sending all maintenance information, and the communication and connection between the recording board and other board cards are isolated in a physical isolation mode. The recording board receives LOG information of a CPU (central processing unit) and an FPGA (field programmable gate array) of the control board through an SPI (serial peripheral interface), reads temperature information and voltage monitoring data of the output board through an I2C interface, and samples and records a switch output board signal output by the control board; the recording board monitors and records communication data between the BTM and the vehicle-mounted host unit through RS-422 and CAN communication; the recording board records corresponding information by recording the state signal of each board card; the recording board reads the data output by the receiving board through a serial port and records the strong and weak marks of the A1 signal and the demodulated FSK signal; the recording board reads the digital signal output by the receiving board and records the FSK signal before demodulation. The recording board records the IO amount of the output board and the control board; the recording board can send the recording file to a U disk or a PC through a USB interface, and can be connected with the monitoring maintenance machine through an Ethernet interface to send monitoring information.

The Antenna Unit (AU) is connected with the BTM (D interface) through an antenna unit cable (D cable), and the Antenna Unit (AU) has the function of radiating a D1 interface signal sent by the BTM downwards to form a magnetic field signal which conforms to the A4 interface specified by TB/T3485. And simultaneously receives an uplink signal which is sent by the activated transponder and conforms to the A1 interface specified by TB/T3485, and sends the uplink signal to the BTM through the D2 interface. In order to determine that a D1 interface signal sent by the BTM is converted into an A4 signal meeting the specified strength by an AU, a magnetic flux judgment circuit capable of picking up the A4 signal is designed in the AU, A4 sampling of AU radiation is completed, the sampling result is modulated into a D3 interface signal by the AU and transmitted to the BTM, information that A4 is too high, too low, zero and normal is timely notified to the BTM, meanwhile, a D3 interface signal generated by the AU adopts the same modulation and demodulation mode and carrier frequency and frequency offset as an uplink and is sent out in a wireless mode, the D3 interface signal is received by a receiving loop in the AU as the A1 signal and transmitted to the BTM through a D cable, and in the BTM, the D3 interface signal and the D2 interface signal formed by A1 are processed by the same functional unit, so that real-time detection of receiving, amplifying and demodulating of the whole BTM can be realized.

In fig. 2, the symbols illustrate that the interface with the on-board host unit is defined as an interface B, and the interface B is designed in two hardware structures, which are respectively: RS-422, CAN; the interface with the ground transponder is defined as an A interface and comprises an A1 interface and an A4 interface; an interface used for testing the BTM is defined as a V interface; the BTM is configured with a separate power interface for providing power to the BTM.

The interface B is an interface between the BTM and the vehicle-mounted host unit, only interface conversion is carried out, and the interface B is designed into two independent dual-channel redundant communication boards on a hardware structure, which are respectively as follows: an RS-422 communication board and a CAN communication board.

The interface "a" is an information transmission interface between the ground transponder and the antenna unit, the interface adopts an electromagnetic induction mode, and the interface "a" is functionally divided into 3 sub-interfaces "a 1", "a 4" and "a 5", wherein the interfaces related to the BTM system are "a 1" and "a 4".

Interface "a 1" is an interface where the transponder transmits uplink transponder messages to the antenna unit, which receives the signals and transmits them to the BTM for filtering, demodulation and decoding; the modulation scheme of the interface "a 1" uplink signal is phase continuous Frequency Shift Keying (FSK). The interface 'A1' signal sent by the ground transponder needs to meet the requirement of section 6.1.1 in TB/T3485 and 2017. The interface "A1" of the antenna unit is designed to be in a passive receiving mode, and continuously receives the qualified "A1" uplink signal.

Interface "a 4" is the interface where the antenna unit transmits rf energy to the ground-based transponder to activate the transponder; interface "a 4" transfers energy from the antenna element to the ground-based transponder by generating a magnetic field that allows the transponder to gain sufficient energy and provide an output signal that is in range with the antenna element that emits the magnetic field. The radio frequency energy signal is a Continuous Wave (CW) signal and the magnetic field frequency is 27.095MHz + -5 kHz. When the frequency offset is not less than 10kHz, the carrier noise should be less than-110 dBc/Hz. The BTM and antenna unit should be such that under various operating conditions, the magnetic flux in the reference region of the transponder (large size, standard size, and standard size mounted laterally) should not be greater than phid 4 when the transponder impedance meets the requirements.

Interface "V" is the interface that is used to test the BTM, and interface "V" communication mode is USB.

The interfaces in fig. 3 illustrate:

interface between control panel and receiving plate: a data interface: the FSK data and the over-point signal from the receiving board are mainly received, and the marks TA1/2, CP1/2 and TK1/2 in the figure 3; antenna self-checking trigger signal: identification 3 in fig. 3, antenna self-test request signal (self-test trigger signal); receiving a board state signal: reference 4 in fig. 3, receives the CRCERR feedback signal of the board FPGA; reset signal: reference 9 in fig. 3, the reset receiving board FPGA signal output by the control board.

Interface between control board and communication board: a communication interface: physical channels of a CAN communication board and an RS-422 communication board, CAN/SCI in figure 3, are realized through CAN and SCI; passing point signal: the over-point signal is transmitted transparently to the on-board host unit, CD1/2 in FIG. 3.

Interface between control board and output board: energy signal switching: reference 6 in fig. 3, the switch for outputting the panel energy signal is controlled by the status signal; outputting board alarm information: the identifier 5 in fig. 3 sends output board standing wave ratio alarm, output board metal alarm and output board overtemperature alarm signals through the IO state.

Communication between the receiving board and the output board: FSK signal: the output board sends the received A1 interface signal to the receiving board, and the signal is connected through the front panel by using a radio frequency jumper, and the label is 2 in the figure 3; self-checking trigger signal: the receiving board sends the self-checking trigger signal after level conversion to the output board, which is the mark 1 in fig. 3;

interfaces between the power panel and the board cards: the power panel provides the converted DC 24V power for each board card; the power supply board provides the converted DC 5V power supply for each board card.

Recording the interface between the board and each board card: monitoring data: the mark 7 in fig. 3 is used for monitoring switching value and communication data, wherein the communication mode between the control board and the recording board and between the receiving board and the recording board is SPI, and the recording board is a slave; the receiving board sends the FSK data before demodulation to the recording board for recording, and the energy intensity indication analog signal of the A1 signal is sampled and then transmitted to the recording board for recording through the SPI; the output board sends the standing-wave ratio, large metal and temperature alarm state-conversion signals to the recording board; communication data: the recording board records the communication information between the vehicle-mounted host unit and the BTM by receiving the data information of the communication board, CAN/SCI and CD1/2 in FIG. 3; outputting board monitoring data information: identification 8, I2C in fig. 3 (output board temperature and voltage information reception);

the interface (D interface) design between the BTM host and the antenna unit: signals D1, D2, D3 and D4 share a transmission medium (share a radio frequency coaxial cable with the impedance of 50 ohms) for transmission, N-type radio frequency coaxial connectors are arranged at two ends of the cable, D1 transmits a 27.095MHz radio frequency power signal generated by a BTM output board to an AU (AU) so as to generate an A4 interface signal and activate a transponder below the AU; d2 transmits the A1 signal of the AU received transponder to the BTM, and the D2 data stream is used for transmitting the FSK signal of the A1 interface received by the AU to the output board of the BTM; d3 transmits self-checking FSK sent by AU to BTM, D3 data stream is used for transmitting A1 interface FSK signal received by AU to output board of BTM, each time AU is started self-checking, D3 transmitted self-checking signal, duration will not exceed 400 uS; d4 is sent by BTM to trigger the self-test unit in AU to generate D3 signal, D4 signal is a negative pulse.

Although the invention has been described and illustrated in some detail, it should be understood that various modifications may be made to the described embodiments or equivalents may be substituted, as will be apparent to those skilled in the art, without departing from the spirit of the invention.

Claims

1. A transponder transmission system characterized by: the ground equipment comprises a transponder and a ground electronic unit, the transponder transmission module uninterruptedly radiates energy to the ground through the antenna unit, the transponder receives the power radiated by the antenna unit, the transponder sends internal coded information to the transponder transmission module, and the transponder transmission module sends the received data information to the vehicle-mounted host unit.

2. A transponder transmission system according to claim 1, characterized in that: the transponder comprises a passive transponder and an active transponder, and the coded information of the ground electronic unit is transmitted to the transponder transmission module through the active transponder.

3. A transponder transmission system according to claim 1, characterized in that: the ground electronics unit transmits information to a train control center or other device.

4. A transponder transmission system according to claim 1, characterized in that: the transponder transmission module consists of a control panel, an output panel, a receiving panel, a power panel, a communication panel, a recording panel and a D cable.

5. A transponder transmission system according to claim 4, characterized in that: the control board is a control core of the system, the messages transmitted by the responder are restored into user messages, and the control board receives the two paths of TA, CP and TK transmitted by the receiving board and analyzes the messages; the control board sends a starting pulse to a self-checking starting circuit on the receiving board; the control board controls the switch of the energy signal of the output board and receives the self-checking FSK data from the antenna unit by receiving the self-checking data sent by the output board, so that the self-checking of the whole function of the BTM is realized.

6. A transponder transmission system according to claim 4, characterized in that: the output board generates a downlink energy signal, outputs the downlink energy signal to the antenna unit through the D cable, receives an A1 interface signal received by the antenna unit, is internally provided with a scattering sheet, outputs information detected by the state detection and the output port of the output board, and outputs the information to the control board for processing.

7. A transponder transmission system according to claim 4, characterized in that: the receiving board A1 interface signal filtering, shaping and FSK signal demodulation are responsible for the level conversion of the production self-checking trigger signal, the demodulation function of the receiving board is designed to be a redundant double set of hardware, and two TA signals (data), two CP signals and two TK signals are provided for the control board.

8. A transponder transmission system according to claim 4, characterized in that: rated input of the power panel is DC 110V, DC 24V and DC 5V are output, an input DC 110V power supply is protected by a protection circuit and filtered by a filter circuit, and is isolated and converted by two DC-DC modules and then is output with DC 24V and DC 5V, wherein fuses are added to two paths of power supplies of the output panel.

9. A transponder transmission system according to claim 4, characterized in that: the communication board realizes a physical carrier for communication between the transponder transmission module and the vehicle-mounted host unit; the communication interface is adapted to dual redundant CAN and RS-422 communication interfaces.

10. A transponder transmission system according to claim 4, characterized in that: the recording board is responsible for recording the error rate detection function and key input, processing and output operation information and fault information in the operation process of the equipment, and is also responsible for sending all maintenance information, and the communication and connection between the recording board and other board cards are isolated in a physical isolation mode.