Civil commanding and dispatching terminal based on Beidou No.3 RSMC

Abstract

The utility model provides a civil commanding and dispatching terminal based on Beidou No.3 RSMC, and belongs to the technical field of communication. The system comprises a Beidou multimode integrated antenna, a radio frequency module, an RSMC module, a Tiantong module, an RNSS module, a power supply module, a display module, a central processing unit, an interface circuit and a WiFi expansion module. Wherein the power supply module comprises an alternating current-direct current transformation module and a voltage conversion module. According to the utility model, the terminal can adapt to various complex application scenes; the system can be connected with a command terminal through WiFi, RS422, a network port and RS232 to complete the functions of multicast, broadcast, receiving and command; a 220VAC power supply module is integrated in the terminal, can bear 300VAC continuous 5-second surge input, has overload, overvoltage and short circuit protection functions, and ensures the safety and reliability of the terminal to a great extent.

Description

Technical Field

[0001] The utility model relates to the technical field of communications, and in particular to a civilian command and dispatch terminal based on Beidou-3 RSMC. Background Art

[0002] In the development of China's satellite navigation industry, the BeiDou system is an important national space infrastructure. Since the basic system of BeiDou-3 was completed at the end of 2018, it has been running stably. At present, the BeiDou system has entered the era of global services, and the application industry has shown rapid development, becoming a national business card. In the next few years, there will be three major development trends: the accelerated development of BeiDou and intelligent integration, the increasing popularity of BeiDou public services, and the increasingly sound legal environment for BeiDou development. The country will also provide more policy support for industrial development in terms of improving system capabilities, increasing core technology development, deepening industrial application demonstrations, and innovating business models. These will become good news for BeiDou's civilian industry and promote the rapid development of the market.

[0003] At present, the civil command and dispatch terminals on the market mainly use BeiDou-2 RDSS communication technology to achieve inter-terminal communication. Although this method can get rid of the limitations of mobile communication base stations, it has problems such as short communication length, slow communication frequency and poor positioning accuracy. For remote areas such as Xinjiang and Tibet, communication length, communication frequency and positioning accuracy are particularly important, especially in terms of defending the border, ecological protection, and geological disaster monitoring. On the other hand, traditional civil command and dispatch terminals only support BeiDou short message function, and cannot realize voice communication function. It is impossible to describe the on-site conditions in detail in time, and the communication effect is not good. Finally, traditional civil command and dispatch terminals need to be equipped with a DC 9V-36V adapter to work properly, which increases the risk of fire safety hazards.

[0004] The BeiDou-3 civil command and dispatch terminal relies on my country's BeiDou-3 satellite navigation and positioning system and Tiantong satellite communication system. It is used to realize Tiantong telephone, Tiantong communication, BeiDou-3 satellite positioning, communication timing, BeiDou-3 broadcast command, and the reception of positioning and communication information of subordinate sub-users. It can realize command and control of subordinate sub-users, facilitate the command and dispatch networking of group users, and meet the use needs of fixed command posts and mobile command posts in different occasions in border well-off village applications. Utility Model Content

[0005] This utility model patent proposes a civil command and dispatch terminal based on BeiDou-3 RSMC, which can solve the problems existing in the current technology, such as short communication distance, slow communication frequency, poor positioning accuracy, lack of voice communication function, and use with adapter.

[0006] The technical solution adopted by the utility model is:

[0007] A civilian command and dispatch terminal based on BeiDou-3 RSMC includes a BeiDou multi-mode integrated antenna, a radio frequency component, an RSMC component, a Tiantong component, an RNSS component, a power component, a display component, a central processing component, an interface circuit, and a WiFi expansion component; wherein the power component includes: an AC / DC transformer unit and a voltage conversion unit.

[0008] Beidou multi-mode integrated antenna integrates multiple frequency points, which can not only receive Beidou-3 satellite, Tiantong satellite and positioning satellite signals, but also has the function of transmitting Beidou-3 satellite and Tiantong satellite signals;

[0009] The RF component is mainly composed of various power division circuits, which are used to divide various signals and feed the Beidou multi-mode integrated antenna at the same time. One end of the RF component is connected to the Beidou multi-mode integrated antenna, and the other end is connected to the RSMC component, RNSS component and Tiantong component to ensure the signal transmission between the RSMC component, RNSS component and Tiantong component and the Beidou multi-mode integrated antenna;

[0010] One end of the RSMC component is connected to the RF component to receive and transmit BeiDou-3 RSMC satellite signals to realize RSMC short message communication function; one end is connected to the central processing component to send short messages sent by other user machines to the central processing component, and at the same time receive messages from the central processing component and transmit them through RSMC communication; finally, it is connected to the IC card to encrypt and decrypt RSMC communication data;

[0011] One end of the RNSS component is connected to the RF component to receive satellite signals and realize the RNSS positioning function; the other end is connected to the central processing component through the serial port to transmit the RNSS position information and time information to the central processing component;

[0012] One end of the Tiantong component is connected to the RF component, which is used to receive and transmit Beidou Tiantong satellite signals to realize voice communication functions with other Tiantong terminals and mobile terminals; one end is connected to the central processing component to send voice information sent by other terminals to the central processing component, and at the same time receive information from the central processing component and transmit it through the Tiantong satellite signal; finally, it is connected to the IC card to encrypt and decrypt the voice communication data;

[0013] The display component is installed on the front panel of the host, including a monochrome OLED display and three working status indicators. The working status indicator is connected to the GPIO pin of the central processing unit, and the monochrome OLED display is connected to the serial port pin of the central processing unit;

[0014] The interface circuit is mainly composed of various protocol conversion chips, which are used to connect the external interface with the internal central processing component to realize the information interaction function between the central processing unit and the host computer and telephone;

[0015] The WiFi expansion component is connected to the interface circuit through the serial port, which is convenient for expanding the communication mode with various host computers;

[0016] The power supply component includes an AC / DC transformer unit and a voltage conversion unit. The AC / DC transformer unit mainly converts the external 220V50Hz AC power input into a 24V DC power supply. The voltage conversion unit mainly converts the 24V DC power supply into multiple voltage sources such as 12V, 5V, 3.3V, etc. to provide suitable voltage for each unit.

[0017] The advantages of the utility model compared with the prior art are:

[0018] (1) The utility model Beidou command and dispatch terminal is composed of a Beidou command and dispatch terminal host and an antenna, supports the management of 5,000 subordinate users, supports the reception and positioning solution of Beidou-3 RNSS signals, supports the reception of S frequency signals of Beidou-3 RDSS and the transmission of Lf1 and Lf2 frequencies, supports Tiantong voice communication function, can realize positioning report, message communication, voice communication, command and other functions, can form a Beidou communication link data transmission network with Beidou-3 civil general terminal, and obtain Beidou communication and positioning information of subordinate users in real time; and realize multicast, on-demand and broadcast through communication control.

[0019] (2) The Beidou command and dispatch terminal host of the utility model adopts a 1U rack-mounted installation structure, which can be easily fixed on the rack. The antenna supports two fixing methods: magnetic attraction and screws, which can meet the needs of rapid deployment and fixed-point installation, and meet the needs of users such as command posts and vehicle-mounted mobile stations.

[0020] (3) This practical Beidou command and dispatch terminal can be connected to the host computer via a network cable, and the host computer software can realize functions such as command and dispatch of subordinate users and viewing the location information of subordinate users.

[0021] (4) This practical Beidou command and dispatch terminal can also be connected to the user's mobile phone APP through the WiFi expansion component, and the terminal management and command functions can be realized through the APP. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a civil command and dispatch terminal based on BeiDou-3 RSMC provided by this utility model patent.

[0023] Figure 2 This utility model patent provides a communication strategy process used by a civil command and dispatch terminal based on Beidou-3 RSMC. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model is clearly and completely described in conjunction with the accompanying drawings. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0025] like Figure 1 As shown, the utility model patent provides a civil command and dispatch terminal based on Beidou-3 RSMC, including Beidou multi-mode integrated antenna, radio frequency component, RSMC component, Tiantong component, RNSS component, power supply component, display component, central processing component, interface circuit, WiFi expansion component; wherein the central processing component includes a central processing unit and a peripheral interface circuit; the Beidou multi-mode integrated antenna includes: RNSS receiving antenna, RSMC receiving antenna, RSMC transmitting antenna, Tiantong satellite transmitting and receiving antenna; the power supply component includes: AC / DC transformer unit, voltage conversion unit.

[0026] The operating frequencies of the Beidou multi-mode integrated antenna include B1, L1, Lf1, Lf2, S, etc. It is used to transmit and receive Beidou and Tiantong satellite signals, and receive Beidou and GPS navigation and positioning signals at the same time. The Beidou multi-mode integrated antenna combines multiple internal signals and connects them to the host RF component through an RF cable;

[0027] The RF component is mainly composed of power division and filtering circuits, which are used to divide various signals and feed the Beidou multi-mode integrated antenna at the same time. One end of the RF component is connected to the Beidou multi-mode integrated antenna through an RF cable, and the other end is divided into three paths, which are connected to the RSMC component, RNSS component and Tiantong component respectively;

[0028] One end of the RSMC component is connected to the RF component, and the other end is connected to the central processing component through the serial port. The RSMC component mainly realizes the regional short message communication function of Beidou-3, which mainly includes two aspects: transmission and reception. In terms of signal reception, the RSMC outbound signal is down-converted to the baseband in the RSMC component, and the Beidou baseband processing part completes signal capture, tracking, decoding, frame synchronization and other processing to obtain the original telegram; the RSMC component business part parses, decrypts and analyzes the telegram, and outputs the short message information to the central processing component through the serial port. In terms of transmission, the baseband processing part of the RSMC component receives the communication application instructions issued by the central processing component, generates different inbound telegrams according to the information category, and then transmits them to the RF component after encoding, spread spectrum, up-conversion and signal amplification, and finally transmits them to the Beidou satellite through the Beidou multi-mode integrated antenna.

[0029] One end of the RNSS component is connected to the RF component, and the other end is connected to the central processing component through a serial port. The RNSS component mainly realizes the positioning function, which mainly includes the satellite signal reception and processing process. The RF channel unit inside the RNSS component performs analog down-conversion filtering and amplification processing on the signal. The outbound analog intermediate frequency signal is sampled through the A / D analog-to-digital conversion chip. After receiving the digital intermediate frequency signal, the baseband signal processing embedded software running in the RNSS component captures and tracks the signal. The positioning solution unit obtains the navigation message, pseudorange measurement value, carrier measurement value, and signal-to-noise ratio from the baseband processing unit, parses the navigation message to obtain the satellite ephemeris, and calculates the position and pitch angle of the visible satellite. Correct various errors and establish error equations for positioning solution processing. After completing the above data processing, the positioning data is transmitted to the central processing component through the serial port.

[0030] One end of the Tiantong component is connected to the RF component, and the other end is connected to the central processing component. The Tiantong component mainly realizes the Tiantong satellite communication function, mainly including uplink and downlink. In terms of the downlink, the received signal is down-converted to the baseband in the Tiantong component. The baseband part of the Tiantong component completes signal capture, tracking, decoding and other processing to obtain the original telegram; the business part of the Tiantong component parses, decrypts and analyzes the telegram, and finally transmits the voice information to the central processing component through the serial port. In terms of the uplink, the baseband processing part of the Tiantong component receives the communication application instruction issued by the central processing component, and then transmits it to the RF component after encoding, frequency conversion and amplification, and finally transmits it to the Tiantong satellite through the Beidou multi-mode integrated antenna.

[0031] The central processing unit is composed of a microcontroller and peripheral circuits, and is mainly connected to various components through peripheral communication interfaces to achieve coordinated management of various functional components. On the one hand, it is connected to the interface circuit through the serial port and I2C to achieve interaction with the outside world; on the other hand, it is connected to the RSMC component, RNSS component and Tiantong component through the serial port to achieve Beidou short message function, positioning function and Tiantong communication function; on the other hand, it is connected to the display component to display positioning status, communication status, current time and other information.

[0032] The display component mainly includes a monochrome OLED display and three working status indicators. The monochrome OLED display is connected to the central processing unit through a serial port, and realizes the display effect in different states by receiving instructions from the central processing unit; the working status indicator is connected to the GPIO pin of the central processing unit, and the central processing unit controls the working status indicator by setting the GPIO pin level.

[0033] The interface circuit is mainly composed of various protocol conversion chips, which are used to connect the external interface with the internal central processing component to realize the information interaction function between the central processing unit and the host computer and telephone;

[0034] The WiFi expansion component is connected to the interface circuit via a serial port, which is suitable for situations where wired connection cannot be used in certain environments;

[0035] The power supply component includes an AC / DC transformer unit and a voltage conversion unit. The AC / DC transformer unit mainly converts the external 220V50Hz AC power input into a 24V DC power supply. The voltage conversion unit mainly converts the 24V DC power supply into multiple voltage sources such as 12V, 5V, 3.3V, etc. to provide suitable voltage for each unit.

[0036] Among them, the RSM component adopts the FH-BDM304 model, the RNSS component adopts the ATGM336H-6N model, the Tiantong component adopts the SCM0110IF model, and the central processing component adopts the GD32F405RGT6 model.

[0037] Communication strategies such as Figure 2 As shown. After the Dou command and dispatch terminal is powered on, the central processing component is initialized, including: clock, serial port driver, network port driver, etc., to establish a data channel for communication with peripherals and enable each functional component to start working; then the card inspection and signal detection steps are started. If it is detected that the card is not inserted or the signal is poor, the display screen and indicator light will give an alarm. If the equipment is running normally, the current time, location information, IC card number and other information will be displayed on the display screen; then the communication application is monitored. If an external communication application is detected, the corresponding service is started after judging the type of communication application, and the main control extracts and frames the data, and finally sends the packaged frame data packet to the satellite through RSMC or Tiantong communication means.

[0038] In this implementation example, the WiFi expansion component integrates MAC, baseband chip, RF transceiver unit, and power amplifier; the built-in low-power operation mechanism can effectively realize the low-power operation of the component; it supports WiFi protocol and TCP / IP protocol, and can realize the networking and data transmission functions of UART devices.

[0039] In this implementation example, the Beidou command and dispatch terminal is equipped with a high-performance dual-frequency GNSS positioning component, which supports all global civil navigation satellite systems, has sub-meter positioning accuracy and multipath anti-suppression technology, and has excellent positioning effects in complex urban environments such as urban canyons.

Claims

1. A civil command and dispatch terminal based on BeiDou-3 RSMC, characterized in that: Including Beidou multi-mode integrated antenna, RF components, RSMC components, Tiantong components, RNSS components, display components, central processing components, interface circuits and WiFi expansion components; One end of the RF component is connected to the Beidou multi-mode integrated antenna, and the other end is connected to the RSMC component, RNSS component and Tiantong component respectively, to ensure signal transmission between the RSMC component, RNSS component and Tiantong component and the Beidou multi-mode integrated antenna; The first port of the RSMC component is connected to the radio frequency component to receive and transmit BeiDou-3 RSMC satellite signals to realize RSMC short message communication function; the second port of the RSMC component is connected to the central processing component to send short messages sent by other user machines to the central processing component, and at the same time receive messages from the central processing component and transmit them through RSMC communication; the third port of the RSMC component is connected to the IC card component to encrypt and decrypt RSMC communication data; One end of the RNSS component is connected to the RF component to receive satellite signals and realize the RNSS positioning function; the other end of the RNSS component is connected to the central processing component through the serial port to transmit the RNSS position information and time information to the central processing component; The first port of the Tiantong component is connected to the RF component to receive and transmit Beidou Tiantong satellite signals to realize voice communication functions with other Tiantong terminals and mobile terminals; the second port of the Tiantong component is connected to the central processing component to send voice information sent by other terminals to the central processing component, and at the same time receive information from the central processing component and transmit it through the Tiantong satellite signal; the third port of the Tiantong component is connected to the IC card to encrypt and decrypt voice communication data; The display component is installed on the front panel of the host, including a monochrome OLED display screen and three working status indicator lights; wherein the working status indicator light is connected to the GPIO pin of the central processing unit, and the monochrome OLED display screen is connected to the serial port pin of the central processing unit; The interface circuit is mainly composed of a variety of protocol conversion chips. One end of the interface circuit is connected to the central processing unit, and the other end is used as an external interface to realize the information interaction function between the central processing unit and the host computer and telephone. The WiFi expansion component is connected to the third port of the interface circuit through the serial port, and is used to expand the communication mode with various host computers.

2. A civilian command and dispatch terminal based on BeiDou-3 RSMC according to claim 1, characterized in that: Also included is a power supply assembly, the power supply assembly comprising an AC / DC transformer unit and a voltage conversion unit; One end of the AC / DC transformer unit is connected to an external 220V 50Hz AC power to convert it into a 24V DC power supply, and the other end is connected to a voltage conversion unit to convert the 24V DC power supply into multiple voltage sources such as 12V, 5V, and 3.3V to provide appropriate voltages for each unit.

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