CN108566214A - A kind of general-purpose type locomotive station based on two-band combined communication standard - Google Patents

Abstract

The present invention provides a kind of general-purpose type locomotive station based on two-band combined communication standard, and antenna feeder unit is connect with 450MHz digital communication units, 400KHz digital communication units and satellite reception unit respectively in the general-purpose type locomotive station；450MHz wireless communication units, 400KHz wireless communication units and satellite reception unit are connect with main control unit；Main control unit is connect with GIS database unit, recording unit, interface unit and operating terminal respectively；Operating terminal is connect with print unit.The general-purpose type locomotive station of the present invention uses the two-band combined communication standard of 450MHz frequency ranges and 400KH frequency ranges, improves the Efficient Coverage Rate of communication；Based on intelligent GIS system application technology, the communication requirement of the adaptive different circuit different working modes of general-purpose type locomotive station is realized.

Description

A Universal Locomotive Radio Station Based on Dual-band Combined Communication System

technical field

The invention relates to the technical field of communication, in particular to a general-purpose locomotive radio station based on a dual-band combined communication system.

Background technique

At present, there are still many railway lines distributed in mountainous and hilly areas in my country. Due to the influence of terrain, the traditional 450MHz wireless communication system can effectively cover the communication of the whole line, which requires a large number of relay equipment and leaky cables, and the cost of equipment is high. It is more difficult to get a perfect solution for the site selection, power supply and maintenance of the equipment installation site in some complex environments such as mountains and hills.

As my country's railways run faster and faster, the transportation volume of railway locomotives is increasing, the requirements for wireless train dispatching communication are getting higher and higher, and the requirements for communication coverage and reliability are getting higher and higher. Railway wireless train dispatching communication system Digital transformation is imperative.

Contents of the invention

In order to solve the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a universal locomotive radio based on the dual-band combined communication system to overcome the defects in the prior art.

In order to achieve the above object, the present invention provides a universal locomotive radio based on a dual-band combined communication system, the universal locomotive radio includes a host and an operating terminal; wherein the host includes a 450MHz wireless communication unit, a 400KHz wireless communication unit , satellite receiving unit, main control unit, GIS database unit, recording unit, interface unit and power supply unit; among them, the antenna feeder unit is respectively connected with 450MHz digital communication unit, 400KHz digital communication unit and satellite receiving unit; 450MHz wireless communication unit, 400KHz The wireless communication unit and the satellite receiving unit are connected with the main control unit; the main control unit is respectively connected with the GIS database unit, the recording unit, the interface unit and the operation terminal; the operation terminal is connected with the printing unit.

As a further description of the general-purpose locomotive radio of the present invention, preferably, the operating terminal includes a first CPU, and the first CPU is connected to a USB interface, an RS232 interface, a first RS422 interface, a first CAN interface, a DSP chip, and a GPIO interface respectively. Connection; Among them, the USB interface is connected with the computer to realize the high-speed data download function of the computer; the RS232 interface is connected with the console to realize the Linux console function; the first RS422 interface is connected with the printer to realize the graphic printing function The first CAN interface is connected with the host, for realizing the interaction of voice and data information with the host; the DSP chip is connected with the loudspeaker and the microphone through the IIS interface, and is used for realizing microphone voice encoding and loudspeaker voice decoding functions; GPIO interface, It is used to realize the control function of voice channel, button backlight and LCD backlight, and realize the function of 8×8 button scanning.

As a further description of the general-purpose locomotive radio station of the present invention, preferably, the first CPU is constructed by an ARMCortex-A8 core microprocessor, and the operating terminal has 512M bytes of RAM, 1G bytes of FLASH, and a 320×240 TFT liquid crystal display.

As a further description of the general-purpose locomotive radio station described in the present invention, preferably, the 450MHz digital communication unit adopts a 450MHz digital-analog compatible digital channel machine and adopts B and C standard communication, and the 400KHz digital communication unit adopts a 400KHz digital channel machine and adopts an induction system Communication, the 450MHz digital-analog compatible digital channel machine and the 400KHz digital channel machine are connected to the main control unit through the UART interface, and are used to realize the digital communication of voice, signaling and FFSK data with the main control unit.

As a further description of the general-purpose locomotive radio station of the present invention, preferably, the satellite receiving unit is connected to the main control unit through a UART interface, so that the satellite receiving unit outputs satellite positioning information to the main control unit, and the main control unit sends information to the operation terminal, The recording unit and the intelligent GIS database unit output satellite positioning information.

As a further description of the general-purpose locomotive radio according to the present invention, preferably, the GIS database unit is connected to the main control unit through a CAN interface for realizing data communication between the main control unit and the GIS database unit.

As a further description of the general-purpose locomotive radio of the present invention, preferably, the recording unit is connected to the main control unit through a CAN interface for realizing data communication between the main control unit and the recording unit.

As a further description of the universal locomotive radio of the present invention, preferably, the interface unit includes a 450MHz antenna interface, a 400KHz antenna interface, a satellite antenna interface, a host USB interface, a second RS422 interface and a second CAN interface; wherein, the 450MHz wireless The communication unit is connected to the 450MHz antenna through the 450MHz antenna interface, the 400KHz wireless communication unit is connected to the 400MHz antenna through the 400KHz antenna interface, the satellite receiving unit is connected to the satellite antenna through the satellite antenna interface; the host USB interface is connected to the main control unit through the UART interface, and the host The USB interface is connected with the computer for downloading computer data; the second RS422 interface is connected with the main control unit through the UART interface, and the second RS422 interface is connected with the train number encoder for sending the train number information; the second CAN interface is connected with the train number encoder. Operator terminal connection.

As a further description of the universal locomotive radio according to the present invention, preferably, the power supply unit includes a DC110V to DC13.8V power supply module and a DC12V battery, and the DC110V to DC13.8V power supply module is connected to an external input power supply, When the external input power supply stops, the DC12V battery provides the power supply.

The universal locomotive radio of the present invention adopts the dual-band combined communication system of 450MHz frequency band and 400KH frequency band, which improves the effective coverage of communication; based on the intelligent GIS system application technology, the universal locomotive radio adapts to the communication requirements of different lines and different working modes .

Description of drawings

Fig. 1 is the overall architecture diagram of the universal locomotive radio station of the present invention;

Fig. 2 is the functional block diagram of the operating terminal of the universal locomotive radio station of the present invention;

Fig. 3 is a functional block diagram of the host of the universal locomotive radio of the present invention.

Detailed ways

In order to further understand the structure, features and other purposes of the present invention, the attached preferred embodiments are now described in detail with accompanying drawings as follows. The embodiments described in the accompanying drawings are only used to illustrate the technical solutions of the present invention and are not limiting this invention.

As shown in Figure 1, Fig. 1 is the overall architecture diagram of the universal locomotive radio of the present invention; the universal locomotive radio includes a host and an operation terminal 1; wherein, the host includes a 450MHz wireless communication unit 2, a 400KHz wireless communication unit 3. Satellite receiving unit 4, main control unit 5, GIS database unit 6, recording unit 7, interface unit 8 and power supply unit 9; wherein, antenna feeder unit 10 is connected with 450MHz digital communication unit 2, 400KHz digital communication unit 3 and satellite The receiving unit 4 is connected; the 450MHz wireless communication unit 2, the 400KHz wireless communication unit 3 and the satellite receiving unit 4 are connected with the main control unit 5; the main control unit 5 is respectively connected with the GIS database unit 6, the recording unit 7, the interface unit 8 and the operation terminal 1 Connection; the operation terminal 1 is connected with the printing unit 11 .

Please refer to Fig. 2, Fig. 2 is the functional block diagram of the operation terminal of the universal type locomotive radio of the present invention; One CAN interface 105, DSP chip 106 and GPIO interface 107 are connected; Wherein, USB interface 102 is connected with computer, is used for realizing computer high-speed data download function; RS232 interface 103 is connected with console, is used for realizing Linux console function; RS422 interface 104 is connected with printer, is used to realize the printing function of graphic text; The first CAN interface 105 is connected with described host computer, is used for realizing the interaction of information such as voice, data with host computer; DSP chip 106 is connected with loudspeaker and Microphone connection, using DSP voice digital codec technology, used to realize microphone voice coding and speaker voice decoding functions; GPIO interface 107, used to realize control functions such as voice channel, button backlight and LCD backlight, and realize 8×8 button scanning function.

The first CPU101 is constructed by the ARM Cortex-A8 core microprocessor, realizes the Linux operating system on this hardware platform, and the operation terminal 1 has the RAM108 of 512M bytes, the FLASH109 of 1G bytes and the TFT liquid crystal display 110 of 320*240 .

Please refer to Fig. 3, Fig. 3 is the functional block diagram of the host computer of the universal locomotive radio of the present invention; Interface unit 8 comprises 450MHz antenna interface, 400KHz antenna interface, satellite antenna interface, host USB interface 801, the second RS422 interface 802 and the second CAN interface 803; wherein, the 450MHz wireless communication unit 2 is connected to the 450MHz antenna through the 450MHz antenna interface, the 400KHz wireless communication unit 3 is connected to the 400MHz antenna through the 400KHz antenna interface, and the satellite receiving unit 4 is connected to the satellite antenna through the satellite antenna interface; the host USB interface 801 is connected with main control unit 5 through UART interface, and host computer USB interface 801 is connected with computer, is used to realize computer data download; connected with the number encoder, used to realize the function of receiving the train number information regularly sent by the train number encoder; the second CAN interface 803 is connected with the operation terminal 1 and the main control unit 5, and is used to realize the voice, digital and other data information of the operation terminal Communication; the GIS database unit 6 is connected with the main control unit 5 through the CAN interface, and is used to realize the communication of the GIS database unit data information; the recording unit 7 is connected with the main control unit 5 through the CAN interface, and is used to realize the main control unit 5 and the recording unit 7 data communication. The main control unit 5 and the power supply unit 9 adopt AD sampling technology to realize the function of real-time monitoring of the power supply voltage and the working current of the whole machine.

main control unit

The main control unit 5 is constructed based on the ARM Cortex-M3 core microprocessor. The microprocessor adopts the Harvard structure, has an independent instruction bus and data bus, and runs at a frequency of up to 200MHz. It integrates CAN bus controller and IIC controller , UART controller, USB controller, timer and other functions, and has a large-capacity on-chip FLASH to achieve high-efficiency, low-power consumption microprocessor performance, especially suitable for applications that require high performance, low cost, and low power consumption Embedded application scenarios.

The main control unit is the central hub of the locomotive radio station, responsible for connecting each component unit of the equipment, and communicating with each component unit according to the specified interface protocol; analyzing and processing the voice and data information transmitted by the communication link, and storing and storing them according to the set function. Forwarding; responding to operating instructions of the operating terminal, etc.

450MHz digital communication unit and 400KHz digital communication unit

The 450MHz digital communication unit 2 adopts a 450MHz digital-analog compatible digital channel machine and adopts B and C standard communication, the 400KHz digital communication unit 3 adopts a 400KHz digital channel machine and adopts an inductive system communication, and the 450MHz digital-analog compatible digital channel machine and 400KHz digital channel The machine is connected with the main control unit 5 through the UART interface, which is used to realize the functions of receiving and sending digital information such as call request digital signaling, sub-audio call signaling, call voice, FFSK data at the end of column, dispatching command, etc., and realize wireless forwarding of train number function of data information.

450MHz digital-analog compatible digital channel machine, adopts TDMA digital wireless communication technology, supports 2 parallel logical channels on 25KHz carrier, improves spectrum utilization and communication efficiency. The digital-analog compatible communication method realizes the smooth transition from analog communication to digital communication of general-purpose locomotive radio. Using digital channels and analog channels, it is realized to control the channel machine to work in digital working mode or analog working mode through channel selection.

The 400KHz digital channel machine adopts CPU software data processing technology to realize digital modulation and demodulation of sub-audio and FFSK data. Based on FPGA data processing technology, digital modulation and demodulation of 400KHz radio frequency signal is realized.

satellite receiving unit

Satellite receiving unit 4 is connected with main control unit 5 through UART interface, so that satellite receiving unit 4 outputs satellite positioning information to main control unit 5, and main control unit 5 outputs satellite to operation terminal 1, recording unit 7 and intelligent GIS database unit 6 positioning information. The satellite information receiving unit can receive the geographical location information and standard clock information of Beidou satellites and GPS satellites compatiblely. For the satellite selection, Beidou is preferred and GPS is assisted.

recording unit

The recording unit has a clock correction module, and the clock correction module automatically performs clock correction according to the satellite positioning information output by the satellite positioning unit, and the correction error is not greater than 5s. The recording unit clock can also be corrected manually. The recording unit mainly stores voice call records, driving log records, dispatching command information, train number information, column end data information, etc. Through the USB interface of the recording unit, the user can use special computer software to read the content of the recording unit, and perform functions such as playback, deletion, storage, and printing. The general-purpose locomotive radio station reserves a voice time recorder interface, which can be connected to an external recording device to realize the voice recording function.

GIS database unit

The GIS database unit is used to store the main information of each railway line, including line name, section name, geographic location data, uplink, downlink, working mode, stations along the line, dispatching contact phone number and other related information and various driver operation prompt information .

The GIS database unit adopts computer database maintenance software, and can download railway operation data information through the USB interface; it can also request the dispatching center to download railway operation data information through wireless communication.

The GIS database unit has the function of automatically learning and updating the database. When the locomotive runs to a new dispatching section, it can request the dispatching center to download the railway operation data of the corresponding section and update the GIS database data; it can also update the GIS database data according to the satellite positioning information and train number. Information and locomotive driver operation, automatically generate the railway operation data of the corresponding section and determine the current position and running status of the locomotive, realize that when the train starts, automatically identify that the train is on the uplink or downlink line to the main control unit, and the main control unit performs corresponding data After processing, the prompt information will be sent to the operation terminal, and the operation terminal will display the prompt information, and send out corresponding voice prompts to remind the driver to perform corresponding operations, so as to realize automatic identification of the information of the station where the locomotive runs to different sections in automatic mode The switching function realizes the voice prompt function of the driver's operation.

The universal locomotive radio of the present invention is based on the application technology of the intelligent GIS system, realizes the communication requirements of the universal locomotive radio adaptive to different working modes of different lines, automatically updates the information in the GIS database according to the train running track, and at a specific time and a specific location Corresponding voice prompts are given for the driver's operations, which greatly reduces the maintenance work of the railway operation database of the general-purpose locomotive radio, increases the reliability of the general-purpose locomotive radio, and improves the safety of railway transportation.

interface unit

Based on the USB interface, it realizes the software upgrade function of each unit, realizes the host parameter query and setting, realizes operations such as reading and deleting the data of the recording unit, and realizes operations such as writing, reading, deleting and modifying the GIS database. Host parameters include 450MHz digital radio transmitting power and receiving threshold, 400KHz digital radio transmitting power and receiving threshold, antenna VSWR, working mode, communication frequency, communication frequency group, local ID, phone book contact list, system time, etc. Based on the RS422 interface, the main control unit obtains a frame of train number information every 200ms, and sends it to the ground receiving equipment for the train number through the 450MHz digital channel machine and the 400KHz digital channel machine, and sends the train number information to the GIS database.

power supply unit

The power supply unit 9 includes a DC110V to DC13.8V power supply module and a DC12V battery to provide stable and reliable working voltages for each unit of the host. The DC110V to DC13.8V power supply module is connected to an external input power supply, and the DC12V battery provides power supply when the external input power supply stops supplying power. The power supply unit can provide power supply for the general-purpose locomotive radio for not less than 2 hours after the external DC power supply is cut off. When the power supply unit supplies power to the universal locomotive radio, the battery over-discharge protection circuit of the main control board of the universal locomotive radio can realize the over-discharge protection function of the battery.

The universal locomotive radio station of the present invention adopts a wireless train dispatching digital mobile trunking communication system composed of 400KHz induction communication and 450MHz digital-analog compatible B and C communication. The 450MHz B communication standard realizes different-frequency duplex communication, and the C communication standard realizes different-frequency simplex or same-frequency simplex communication, so it is compatible with the needs of various communication methods on different existing railway lines. There are two modes of working mode switching: automatic switching and manual switching. Users can compare the received satellite positioning information with the GIS database data to realize the function of automatically switching working modes. When the satellite positioning function fails or the user is forced to enter the manual switching mode, the function of manually switching the working mode can be realized by operating the keys on the operation terminal. The universal locomotive radio supports the working mode memory function, that is, after the equipment is turned on, the working mode is memorized before it is turned off.

In the digital communication state of the universal locomotive radio station of the present invention, the system adopts the unified numbering method of the whole network, realizes user identity identification and authority management in the network, and realizes wired and wireless communication between wireless train dispatching communication devices based on numbers. In the digital communication mode of general locomotive radio, it supports number-based individual call, group call, broadcast, emergency call, multi-party call and other functions. In the analog working mode, the general-purpose locomotive radio adopts sub-audio as the call signaling method to realize the equipment type identification function of communication equipment.

voice communication function

When the general locomotive radio works in digital mode, the wireless voice digital information received by the 450MHz digital channel machine and the 400KHz digital channel machine is sent to the operation terminal through the main control unit, and the DSP voice signal processing of the operation terminal converts the digital signal into an analog voice signal , to the speaker for playback; the other to the recording unit for recording and storage. The voice signal of the operation terminal microphone is processed by the DSP voice signal to convert the analog voice signal into a digital voice signal and send it to the host computer. The recording unit performs recording storage. The universal locomotive radio adopts DSP voice processing technology to effectively solve the problem of suppression of environmental noise.

When the general-purpose locomotive radio works in analog mode, the 450MHz digital-analog compatible digital channel receiver receives analog wireless voice signals, and through the audio channel of the main control unit, one channel is sent to the operating terminal speaker for playback; the other channel is sent to the recording unit for recording and storage. The voice signal received by the 400KHz digital channel machine is converted into an analog signal after being processed by the DSP voice signal, and sent to the operating terminal speaker for playback through the audio channel of the main control unit; the other is sent to the recording unit for recording and storage. The voice signal of the operating terminal microphone is sent to the host, and the main control unit of the host controls the voice channel, and the voice signal is sent all the way to the 450MHz digital-analog compatible digital channel machine for wireless transmission; all the way is sent to the 400KHz digital channel machine for DSP voice digital processing, and then wireless Send; all the way to the recording unit for recording storage.

digital communication function

In the digital working mode, the data signals received wirelessly by the 450MHz digital channel machine and the 400KHz digital channel machine are sent to the main control unit, and the main control unit sends all the way to the operation terminal for corresponding display and sound and light prompts; all the way to the recording unit for storage , sent all the way to the GIS database for scheduling command identification. The digital information to be sent by the operation terminal and the train number information received by the encoder interface are sent to the main control unit CPU for data processing, and then sent all the way to the 450MHz digital channel machine and 400KHz digital channel machine for wireless transmission, and all the way to the recording unit for further processing. storage.

In the analog working mode, the FFSK data signal wirelessly received by the 450MHz digital channel machine and the 400KHz digital channel machine is demodulated by the FFSK modulation and demodulation circuit of the 450MHz digital channel machine and the 400KHz digital channel machine, and sent all the way to the main control unit. The unit sends to the operation terminal for corresponding display and sound and light prompts, and all the way to the recording unit for storage. The FFSK data information to be sent by the operation terminal and the train number information received by the encoder interface are sent to the main control unit CPU for data processing, and then sent all the way to the 450MHz digital channel machine and 400KHz digital channel machine for FFSK modulation, and then wireless transmission. All the way to the recording unit for storage.

It should be declared that the above summary of the invention and specific implementation methods are intended to prove the practical application of the technical solutions provided by the present invention, and should not be interpreted as limiting the protection scope of the present invention. Those skilled in the art may consider various modifications, equivalent replacements or improvements within the spirit and principle of the present invention. The protection scope of the present invention shall be determined by the appended claims.

Claims (9)

1. A general locomotive radio station based on a dual-band combined communication system is characterized by comprising a host and an operation terminal (1); wherein,

the host comprises a 450MHz wireless communication unit (2), a 400KHz wireless communication unit (3), a satellite receiving unit (4), a main control unit (5), a GIS database unit (6), a recording unit (7), an interface unit (8) and a power supply unit (9); wherein,

the antenna feeder unit (10) is respectively connected with the 450MHz digital communication unit (2), the 400KHz digital communication unit (3) and the satellite receiving unit (4); the 450MHz wireless communication unit (2), the 400KHz wireless communication unit (3) and the satellite receiving unit (4) are connected with the main control unit (5); the main control unit (5) is respectively connected with the GIS database unit (6), the recording unit (7), the interface unit (8) and the operation terminal (1); the operation terminal (1) is connected to the printing unit (11).

2. The universal locomotive radio according to claim 1, characterized in that the operation terminal (1) comprises a first CPU (101), the first CPU (101) is respectively connected with the USB interface (102), the RS232 interface (103), the first RS422 interface (104), the first CAN interface (105), the DSP chip (106) and the GPIO interface (107); the USB interface (102) is connected with a computer and is used for realizing the high-speed data downloading function of the computer; the RS232 interface (103) is connected with the console and is used for realizing the function of the Linux console; the first RS422 interface (104) is connected with a printer and is used for realizing the printing function of pictures and texts; the first CAN interface (105) is connected with the host and used for realizing the interaction of voice and data information with the host; the DSP chip (106) is connected with the loudspeaker and the microphone through an IIS interface and is used for realizing the functions of microphone voice coding and loudspeaker voice decoding; and the GPIO interface (107) is used for realizing the control functions of a voice channel, key backlight and liquid crystal backlight and realizing the 8 x 8 key scanning function.

3. A universal locomotive radio as claimed in claim 2, characterized in that the first CPU (101) is built from an ARM Cortex-A8 core microprocessor and the operator terminal (1) has a RAM (108) of 512 mbytes, a FLASH (109) of 1 gbyte and a TFT liquid crystal display (110) of 320 x 240.

4. The universal locomotive radio according to claim 1, characterized in that the 450MHz digital communication unit (2) employs a 450MHz digital-analog compatible digital channel machine and employs B, C standard communication, the 400KHz digital communication unit (3) employs a 400KHz digital channel machine and employs induction standard communication, the 450MHz digital-analog compatible digital channel machine and the 400KHz digital channel machine are connected with the main control unit (5) through UART interface for implementing digital communication of voice, signaling, and FFSK data with the main control unit.

5. A universal locomotive radio as claimed in claim 1, characterized in that the satellite receiving unit (4) is connected to the main control unit (5) via a UART interface, so that the satellite receiving unit (4) outputs satellite positioning information to the main control unit (5), and the main control unit (5) outputs satellite positioning information to the operation terminal (1), the recording unit (7) and the intelligent GIS database unit (6).

6. Universal locomotive radio as claimed in claim 1, characterized in that the GIS database unit (6) is connected to the master control unit (5) via a CAN interface for data communication between the master control unit and the GIS database unit.

7. Universal locomotive radio station according to claim 1, characterized in that the recording unit (7) is connected to the master control unit (5) via a CAN interface for data communication between the master control unit (5) and the recording unit (7).

8. A universal locomotive radio according to claim 1, characterized in that the interface unit (8) comprises a 450MHz antenna interface, a 400KHz antenna interface, a satellite antenna interface, a host USB interface (801), a second RS422 interface (802) and a second CAN interface (803); the 450MHz wireless communication unit (2) is connected with a 450MHz antenna through a 450MHz antenna interface, the 400KHz wireless communication unit (3) is connected with a 400MHz antenna through a 400KHz antenna interface, and the satellite receiving unit (4) is connected with a satellite antenna through a satellite antenna interface; the host USB interface (801) is connected with the main control unit (5) through a UART interface, and the host USB interface (801) is connected with a computer and used for realizing computer data downloading; the second RS422 interface (802) is connected with the main control unit (5) through a UART interface, and the second RS422 interface (802) is connected with the train number encoder and used for sending the train number information; the second CAN interface (803) is connected to the operating terminal (1).

9. The universal locomotive radio as claimed in claim 1, characterized in that the power supply unit (9) comprises a DC power supply DC 110V-DC13.8V power supply module and a DC12V battery, said DC power supply DC 110-110V-DC13.8V power supply module is connected to the external input power supply, and when the external input power supply is stopped, the power supply is provided by said DC12V battery.