CN210007697U - hand-held railway active transponder message generator - Google Patents

Abstract

The utility model relates to a kind of hand-held type's active transponder message generating device of railway, including DSP treater chip, the lithium cell, keyboard control module, the liquid crystal display module, the DDS module, DBPL coding circuit, filtering power amplifier circuit, frequency shift keying modulation circuit and two-way receiving and dispatching antenna module, DSP treater chip and lithium cell are connected, keyboard control module's output and DSP treater chip are connected, the output and the input of liquid crystal display module of DSP treater chip are connected, the output and the DDS module of DSP treater chip are connected, the output and the DBPL coding circuit of DDS module are connected, DBPL coding circuit output and filtering power amplifier circuit are connected, filtering power amplifier circuit output and frequency shift keying modulation circuit are connected, frequency shift keying modulation circuit output and two-way receiving and dispatching antenna module are connected, and be connected with DSP treater chip, the utility model discloses can ensure the real-time and the reliability of message data, and is with low costs, small, be convenient for developing the teaching.

Description

hand-held railway active transponder message generator

Technical Field

The utility model relates to an kinds of transponders, especially kinds of hand-held railway active transponder message generating device.

Background

Railway transponders are divided into two types, passive transponders and active transponders. The ground passive transponder can only send fixed data messages, and the active transponder can send real-time variable data messages when connected with a ground electronic unit (LEU). The responder message refers to a message which is stored in the responder or transmitted by an LEU after being scrambled by a European coding algorithm of a responder user message.

At present, active transponder messages are mainly generated by a station ground train control center TCC according to information such as access information and temporary speed limit (such as access station stock numbers and signal lamp positions) through real-time coding, and are sent to an active transponder through a ground electronic unit LEU, but whether the message data is lost or wrong cannot be shown, and equipment such as the train control center, the ground electronic unit and the active transponder is expensive and large in size, and is difficult to bear if the train training equipment is purchased in batches for a railway college with relatively short capital.

In order to enable students to master the working principle of a train operation control system, train control equipment composition and other knowledge, master equipment operation and testing methods, get familiar with common fault phenomena, analyze the working state of equipment and quickly process faults, schools need to build a vehicle-mounted ATP training platform. The construction of the platform is not necessary to provide a point-type device-responder for transmitting important vehicle control information to the vehicle-mounted ATP device. When the train passes over the transponder, the transponder receives electromagnetic energy transmitted by the vehicle-mounted antenna and converts the electromagnetic energy into electric energy, so that an electronic circuit in the ground transponder works and sends data message information to the vehicle-mounted ATP (until the vehicle-mounted antenna leaves). Compiling a transponder message and establishing vehicle-ground communication are necessary basic conditions for constructing a vehicle-mounted ATP training platform.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing hand-held railway active transponder message generating devices.

hand-held railway active transponder message generating devices, including DSP processor chip, lithium cell, keyboard control module, liquid crystal display module, DDS module, DBPL coding circuit, filtering power amplifier circuit, frequency shift keying modulation circuit and two-way receiving and dispatching antenna module, DSP processor chip and lithium cell connection, the output of keyboard control module is connected with DSP processor chip, the output of DSP processor chip is connected with the input of liquid crystal display module, the output of DSP processor chip is connected with DDS module, the output of DDS module is connected with DBPL coding circuit, the output of DBPL coding circuit is connected with filtering power amplifier circuit, the output of filtering power amplifier circuit is connected with frequency shift keying modulation circuit, the output of frequency shift keying modulation circuit is connected with two-way receiving and dispatching antenna module, the output of frequency shift keying modulation circuit is connected with DSP processor chip.

The technical proposal of step of the utility model is that the device also comprises a PC upper computer which is connected with the DSP processor chip.

The method comprises the steps of writing user messages into a DSP (digital signal processor) chip through a keyboard control module, or finishing the compilation of the user messages by adopting a PC (personal computer) upper computer, sending the user messages to the DSP chip through a serial communication port, converting the received user message data by the DSP chip to generate responder messages, transferring the message data to a DDS (digital data processing) module, buffering, outputting the message data to a DBPL (digital signal processor) coding circuit, carrying out digital coding, amplifying the message data by a filter power amplification circuit, modulating the message data by a frequency shift keying modulation circuit, feeding back active responder message information to the DSP chip in the aspect, and transmitting the message information to a bidirectional receiving and transmitting antenna in the aspect.

The method comprises the steps of writing a user message into a DSP (digital signal processor) chip through a keyboard control module, or finishing the compilation of the user message by adopting a PC (personal computer) upper computer, sending the user message to the DSP chip through an RS485 serial communication port, synthesizing a transponder transmission message by the DSP chip after performing message disturbance calculation, message 10-11 bit conversion, shaping constraint condition check and check bit calculation on the user message according to a transponder FFFIS (Flexible flat field Effect transistor) coding strategy, transferring message data to a DDS (direct digital synthesizer) module, buffering by the DDS module, outputting to a DBPL (digital data processing) coding circuit for digital coding, amplifying a digital signal and an 8.82kHz sine wave generated by the DDS module through a filter power amplification circuit, modulating by a frequency shift keying modulation circuit, feeding back active transponder message information to the DSP chip, and sending the active transponder message information to a vehicle through a bidirectional transceiving antenna.

Due to the adoption of the technical scheme, the utility model discloses an active transponder message generating device of railway of kinds of hand-held type has following beneficial effect:

1. the utility model discloses a DSP processor chip, the lithium cell, keyboard control module, the liquid crystal display module, the DDS module, DBPL coding circuit, the filtering power amplifier circuit, shift frequency keying modulation circuit and two-way receiving and dispatching antenna module, by the lithium cell power supply, write in user's message to the DSP chip through keyboard control module, or adopt the PC host computer to accomplish the establishment of user's message, send user's message to the DSP chip through the serial communication mouth again, the DSP processor passes through European encoding algorithm with the user's message data of receiving, the transponder message is produced to the scrambling, use the DDS module, adopt on-the-spot programmable device FPGA and D/A converter DAC900E, adopt direct digital frequency synthesis technique (DDS), produce 8.82kHz sine wave, use DBPL coding circuit, adopt sequential logic circuit, realize the biphase difference level coding, receive DDS module output message data and carry out digital coding, then amplify through the filtering power amplifier circuit, after shift frequency keying modulation circuit modulation, side feeds back active transponder message information to the processor chip, supply the liquid surface to show, in addition aspect conveys the two-way antenna, the utility model is sent to the real-time transmit the message, the low-time simulation ground of the transponder data, the utility model, the real-time simulation is good, the real-time simulation ground of the low-time simulation is good can be used, the instrument, the real-.

2. The utility model discloses can carry out the real-time establishment and the transmission of transponder message, simulate on-the-spot station train control center extremely and made up active transponder message function in real time to can ensure the reliability of message data the device possesses visual interface, and with low costs, small, volume production, is favorable to the railway colleges to develop the real teaching of instructing of experiment, in addition, the utility model discloses also be applicable to reason real ization teaching to can push away and train the use for new staff's the training on duty and the high-speed railway technique of railway electric affairs portion from now on.

The technical features of the handheld railway active transponder message generating devices of the present invention will be further described with reference to the drawings and the specific embodiments of the present invention at step .

Drawings

FIG. 1 is a block diagram of hand-held railway active transponder message generating devices.

FIG. 2: DBPL coding scheme.

FIG. 3: an example list of user information.

Detailed Description

A hand-held railway active transponder message generating device comprises a DSP processor chip, a lithium battery, a keyboard control module, a liquid crystal display module, a DDS module, a DBPL coding circuit, a filtering power amplification circuit, a frequency shift keying modulation circuit, a bidirectional transmitting and receiving antenna module and a PC host computer, wherein the lithium battery is respectively connected with the DSP processor chip, the keyboard control module, the liquid crystal display module, the DDS module, the DBPL coding circuit, the filtering power amplification circuit, the frequency shift keying modulation circuit, the bidirectional transmitting and receiving antenna module and other modules which need electricity to provide electricity, the output end of the keyboard control module is connected with the DSP processor chip, the output end of the DSP processor chip is connected with the DDS module, the output end of the DDS module is connected with the DBPL coding circuit, the output end of the filtering power amplification circuit is connected with the frequency shift keying modulation circuit, the output end of the frequency shift keying modulation circuit is connected with the bidirectional transmitting and receiving antenna module, the messages are processed by a DSP chip, the DSP chip is connected with the PC chip, the DSP chip is used for receiving the messages, the messages are processed by a PSK coding circuit, the DDS chip is directly processed by a PSK coding circuit, the DDS chip.

The device is powered by the lithium battery, the PC is used as an upper computer, the PC finishes the compilation of user messages, the user messages are sent to the DSP processor chip through the RS485 serial communication port (or user messages are written into the DSP processor chip through the keyboard control module), the DSP processor chip carries out message disturbance calculation, message 10-11 bit conversion, shaping constraint condition check and calculation check on the user messages according to an FFFIS coding strategy of the European transponder, the synthetic transponder transmits the messages, the message data are transferred to a kHz module, the message data are output to a DDS module, the DDS module outputs the messages to a DDS module, the DDS module generates a digital signal through a DDS coding interface, the DDS module generates a digital signal through a DDS encoding interface, the DDS module generates a digital signal through a digital signal transmission interface, the DDS module and a bidirectional transmitting and receiving antenna module, and the transmitting antenna module are used for carrying out volume production, and the digital signal processing.

In this embodiment:

the lithium battery is adopted for power supply, and the PC is adopted as an upper computer.

A TMS320F series DSP processor chip is selected as a processor, an A/D converter, a CAN module and a Flash program memory with large storage capacity are integrated in the processor, rich GPIO interfaces are provided, a main frequency is about 150MHZ (CAN reach 30MHZ in a power saving mode), high-speed data processing CAN be supported, the real-time requirement of message transmission CAN be completely met, and in addition, required peripheral equipment CAN be determined according to the selected processor, wherein the peripheral equipment comprises a steady state RAM, an E-PROM, a Flash memory, a serial and parallel communication interface, a network interface, a programmable timer/counter, a state LED indication and an applied special hardware circuit.

The DSP chip is used as a core processing component and can receive user message data transmitted by an upper computer (or write the user message into the DSP chip through a keyboard control module), then the received user message data is scrambled through an FFFIS (fast Fourier transform and interference and noise enhancement) coding algorithm of the European transponder to generate a transponder transmission message, and then the message data is output to the DDS module. In addition, the TMS320F series DSP processor chip has an online C + + programming function, and can use the software Microsoft visual C + + programming on the PC to design the MFC interface on the liquid crystal display module, so as to visualize the message data and the operation information.

The keyboard control module is used for inputting control commands or writing user message data into the DSP processor chip, and the functions of message display, storage, reset, system conversion and the like are realized.

The liquid crystal display module displays real-time messages received by the DSP processor chip and ongoing operation information in real time.

The DDS module applies a field programmable array FPGA and a high-speed D/A conversion module DAC900E, can receive and buffer message data transmitted by a DSP processor chip, continuously outputs the message data to a DBPL coding circuit at the rate of 564.48kbps on the side, and generates 8.82kHz sine waves for modulation by adopting a direct digital frequency synthesis (DDS) technology on the other side.

The DBPL coding circuit adopts a sequential logic circuit to realize biphase differential level coding, receives message data output by the DDS module and codes the message data. The DBPL coding process is as follows: data is firstly processed in parallel to serial by adopting HC 595. The frequency division by 2 and the frequency division by 64 are realized by a counter 74161, a differential circuit is realized by an operational amplifier and an RC, after inverting parallel to serial output, the inverted output is subjected to AND operation with the rising edge of the output of the differential circuit, the frequency division by 2 is realized by a counter 74161, and then the coded output is obtained by XOR operation. The output 8.82kHz square wave and 564.48 kHz pulse wave are respectively filtered, amplified and conditioned, and then synthesized into a DBPL signal.

And the frequency shift keying modulation circuit receives the output signal of the DBPL coding circuit, performs frequency shift keying modulation on the output signal and 8.82kHz sine wave, and transmits the modulated signal to the DSP processing chip and the bidirectional transceiving antenna.

The bidirectional receiving and transmitting antenna module is connected with the frequency shift keying modulation circuit, can receive 27.095MHz electromagnetic energy transmitted by the vehicle-mounted antenna during vehicle-mounted joint debugging, activates real-time coding, and transmits 4.234MHz active transponder message information to the transponder vehicle-mounted antenna.

Table is a message structure list:

message structure description:

user message: the total number of 830 bits is composed of 50 bits of frame flag, 772 bits of user information packet and 11111111 end of message flag.

Sd user message: converting the user message from every 10 bits to sd user message after 11 bits

Cb control code: cb =001

Sb scrambling code: generating a polynomial:

the scrambling code should be selected according to the principle of small to large.

Esb trimming code: additionally modifies the data bits, the code being determined from the user data.

The trim code should be selected on a small to large basis.

BCH check code: and (4) calculating the obtained check code.

Claims (2)

1. The hand-held railway active transponder message generating device is characterized by comprising a DSP (digital signal processor) chip, a lithium battery, a keyboard control module, a liquid crystal display module, a DDS (digital data synthesis) module, a DBPL (digital broadcast phase) coding circuit, a filtering power amplifier circuit, a frequency shift keying modulation circuit and a bidirectional transceiving antenna module, wherein the DSP chip is connected with the lithium battery, the output end of the keyboard control module is connected with the DSP chip, the output end of the DSP chip is connected with the input end of the liquid crystal display module, the output end of the DSP chip is connected with the DDS module, the output end of the DDS module is connected with the DBPL coding circuit, the output end of the DBPL coding circuit is connected with the filtering power amplifier circuit, the output end of the filtering power amplifier circuit is connected with the frequency shift keying modulation circuit, the output end of the frequency shift keying modulation circuit is connected with the bidirectional transceiving antenna module, and the output end of the.
2. 2. The hand-held railway active transponder message generating device of claim 1, further comprising a PC upper computer, wherein the PC upper computer is connected to the DSP processor chip.

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