CN210109593U - Control system of TACAN navigation equipment - Google Patents

Abstract

The utility model relates to a control system of TACAN navigation equipment, the ARM treater is the system core, handle, calculation function, the ARM treater respectively with the RTC chip, the AD chip, FRAM flash memory, the USB interface, optical fiber transceiver connects, the ARM treater passes through the CAN interface respectively with the transmitter, receiver and monitor link to each other, the ARM treater passes through 232 serial ports and compass module, big dipper module, wireless module links to each other, the ARM treater passes through LVDS interface connection LCD screen, the ARM treater has expanded GPIO and the bee calling organ of multichannel through the I2C bus, metal button and pilot lamp are connected, AC/DC power module is connected to the AD chip. The system has the advantages of good universality, good expandability, strong stability, high communication speed, fast response, small volume, multiple interfaces and complete functions, and CAN meet various communication modes such as 232, 422, CAN, SPI, network, optical fiber and the like.

Description

A control system for TACAN navigation equipment

technical field

The utility model relates to a control system of TACAN navigation equipment, which is used for communication and control of TACAN navigation equipment, DME and other equipment.

Background technique

In recent years, with the increasing number of airport navigation equipment at home and abroad, the requirements for the equipment are also getting higher and higher. The control circuit of the previous generation TACAN equipment control system is a single-chip microcomputer + FPGA structure, with low communication rate and slow communication response. The external interface is serial port and IO, and the connectors are complex and bulky. It is easy to be disturbed, which limits the subsequent development and functional upgrade of the product. In view of the current situation of equipment, relevant R&D personnel have been studying how to solve and optimize it.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the utility model is a control system for a TACAN navigation equipment, which has good versatility, good scalability, strong stability, high communication rate, fast communication response, small size, and anti-interference. powerful.

The technical scheme adopted by the utility model is: a control system for TACAN navigation equipment, including a DC/DC power supply module, a remote control, a monitor, a transmitter, a receiver, a liquid crystal screen, a compass module, a Beidou module, and a wireless module , buzzer, metal button and indicator light; it is characterized in that: the control system consists of ARM processor, RTC chip, AD chip, FRAM flash memory, USB interface, I2C bus, optical fiber transceiver, CAN interface, 232 serial port, LVDS interface composition;

The ARM processor is the core of the system and performs processing and computing functions. The ARM processor is respectively connected with the RTC chip, the AD chip, the FRAM flash memory, the USB interface and the optical fiber transceiver. The ARM processor is respectively connected with the transmitter and the receiver through the CAN interface. The ARM processor is connected to the compass module, Beidou module and wireless module through the 232 serial port. The ARM processor is connected to the LCD screen through the LVDS interface. The ARM processor expands multiple channels of GPIO through the I2C bus, buzzer, metal The button and the indicator light are connected; the AD chip is connected to the AC/DC power supply module;

AD chip collects analog data;

The optical fiber transceiver can realize the conversion of two different transmission media, twisted pair and optical fiber, and can make the system connect to the remote control through optical fiber to realize remote control;

The ARM processor controls the clock through the RTC chip;

ARM processor stores system parameters through FRAM flash memory;

The ARM processor adopts the ARM Cortex-A5 industrial-grade wide temperature chip of ATMEL Company, and externally expands two 64M*16DDR2 chips with a total of 256MB as the system running memory. It is attached to the lower 16-bit data bus, the other is attached to the upper 16-bit data bus, and a 256M*8bit SLC NandFlash chip is used to store related programs;

The fiber optic transceiver model is TR-962D or UT-2177;

The network card chip of the system is connected to the Ethernet through the transformer, and is connected to the network port of the computer through the network port. The computer can communicate with the system to achieve the control purpose.

The beneficial effects of the utility model are: the control system of the utility model is the dispatching center of the coordination and cooperation of each unit of the equipment, and has the functions of information collection, information processing, information transmission and information storage. The control system of the previous generation requires special peripheral chips to implement, which takes up a lot of resources.

The control system has good scalability, clear control logic, fast communication speed, multiple modes, and good performance. Compared with the previous generation, the serial communication rate and CAN port communication rate have been improved.

The system provides a good human-machine interface, and the remote control of the TACAN system can be realized through the remote control. The control system of the previous generation did not have a remote control and could not realize remote control.

The system cost is reduced, and the selected raw materials are all stable and reliable industrial-grade devices on the market, which shortens the procurement cycle and production cycle, and reduces the cost of the control system by nearly 30% compared with the previous generation. Due to the optimization and upgrading of components, the volume of the system is also reduced, which is more convenient for installation, debugging and maintenance.

After the system was successfully developed, it was quickly used in TACAN equipment, which better adapted to the requirements of the environment, and was also applied in some complex environments. Compared with the previous generation control system, it was more suitable for long-term work at low temperature.

In a word, this control system has network communication function, CAN communication function, serial communication function, IO control acquisition function, AD acquisition function and display function. The control system has good versatility, good scalability, strong stability, high communication rate, fast communication response, small size, and strong anti-interference. It can be used in various navigation equipment such as TACAN and DME. , can meet 232, 422, CAN, SPI, network, optical fiber and other communication methods.

The control system can also be used in other navigation equipment.

Description of drawings

Fig. 1 is the circuit connection block diagram of the utility model.

Detailed ways

The present utility model is described in detail below in conjunction with the accompanying drawings.

Referring to Fig. 1, a control system of TACAN navigation equipment, including DC/DC power module, remote control, monitor, transmitter, receiver, LCD screen, compass module, Beidou module, wireless module, buzzer, metal buttons and indicator lights; the control system is composed of ARM processor, RTC chip, AD chip, FRAM flash memory, USB interface, I2C bus, optical fiber transceiver, CAN interface, 232 serial port, and LVDS interface.

The ARM processor is the core of the system and performs processing and computing functions. The ARM processor is connected to the RTC chip, AD chip, FRAM flash memory, USB interface, and fiber optic transceiver. The ARM processor is connected to the transmitter, receiver, and monitoring device through the CAN interface. The ARM processor is connected to the compass module, Beidou module and wireless module through the 232 serial port. The ARM processor is connected to the LCD screen through the LVDS interface. The ARM processor expands the multi-channel GPIO and buzzer, metal buttons and I2C bus through the I2C bus. The indicator light is connected, and the AD chip is connected to the AC/DC power supply module.

AD chip collects analog data;

The optical fiber transceiver adopts the TR-962D optical fiber transceiver of Pulian Technology Co., Ltd. or the UT-2177 optical fiber transceiver of Shenzhen Yutai Technology Co., Ltd., which can realize the conversion of two different transmission media, twisted pair and optical fiber. The remote control is realized by connecting the remote control with optical fiber. The control system is equipped with a network port, which is connected to the network port of the optical fiber transceiver. The remote control is connected to the optical fiber interface of the optical fiber transceiver through the optical fiber, and the communication with the remote control can be realized. The remote control is Remote control equipment with optical fiber interface;

The ARM processor controls the clock through the RTC chip;

The ARM processor stores system parameters through FRAM flash memory, including system boot-up parameters, system version information, and alarm threshold parameters.

The ARM processor adopts the ARM Cortex-A5 industrial-grade wide temperature chip of ATMEL Company, and externally expands two 64M*16DDR2 chips with a total of 256MB as the system running memory. It is attached to the lower 16-bit data bus, and the other is attached to the upper 16-bit data bus. 256M*8bit SLC NandFlash chip to store relevant parameter content, including boot content, kernel, file system, etc. required for system startup.

The network card chip of the system is connected to the Ethernet through the transformer, and is connected to the network port of the computer through the network port. The computer can communicate with the system to achieve the control purpose.

The main functions of each part of the control process in the system are:

1) The network communication thread mainly completes the network communication function. The control system has a complete TCP/IP protocol stack, supports the current mainstream network protocols, and is connected to the network as a TCP/UDP server or client. The network communication function is used to communicate with the maintenance software, which is convenient for debugging and maintenance.

The control system obtains the working status of each working unit, that is, the normal or fault information, from each working unit board, and can obtain the working status information of each power supply from the output of each power supply, and can collect the voltage of each power supply. These information can be queried through the maintenance software and LCD screen display. , and can set parameters to the system through the maintenance software.

The control system realizes data communication with the remote control through the optical fiber transceiver, and realizes the state control of the remote control device on the local device and the reading of the state information of the local device. When the optical fiber is not connected, the wireless module and the remote control can be used to communicate.

2) The main function of the CAN communication thread is to communicate with the monitor, receiver and transmitter coding unit through the CAN interface, and the control system sends control, query or setting instructions to the receiver, monitor, and transmitter coding unit through the CAN bus and At the same time, it receives various monitoring parameters from the monitor on the CAN bus in real time and responds in time, including the operation of alarm LED light display and alarm sound.

3) Serial communication thread, the control system carries out RS232 serial communication, can write communication protocol according to specific application, realize complete serial communication function, and realize serial communication with compass module, Beidou module and wireless module in the device.

4) I/O controls the acquisition thread, the control system performs digital input acquisition and output control through the I2C bus extended input and output unit, the maximum number of IO can reach 256, the alarm and bypass of the monitor, and the switch of the transmitter This kind of signal is used for machine signal, buzzer, metal button and indicator light information.

5) AD acquisition thread, on the analog input, the AD chip AD7992 is used to collect analog data, and the input resolution is 12 bits. With the external expansion chip, it can achieve up to 19 channels of analog signal acquisition function, that is, 12 channels of external AD plus internal 7 channels Channel AD, and filter processing, and finally realize the alarm, output, and storage functions according to the needs of the application.

The display process in the system application program mainly completes the display task and displays the relevant content. The system has a display interface, and an external LCD screen is expanded for display. The interface is an LVDS interface.

Claims (1)

1. A control system of a Takang navigation device comprises a DC/DC power supply module, a remote controller, a monitor, a transmitter, a receiver, a liquid crystal screen, a compass module, a Beidou module, a wireless module, a buzzer, metal keys and an indicator light; the method is characterized in that: the control system consists of an ARM processor, an RTC chip, an AD chip, an FRAM flash memory, a USB interface, an I2C bus, an optical fiber transceiver, a CAN interface, a 232 serial port and an LVDS interface;

the ARM processor is a system core and is used for processing and calculating functions, the ARM processor is respectively connected with the RTC chip, the AD chip, the FRAM flash memory, the USB interface and the optical fiber transceiver, the ARM processor is respectively connected with the transmitter, the receiver and the monitor through the CAN interface, the ARM processor is connected with the compass module, the Beidou module and the wireless module through 232 serial ports, the ARM processor is connected with the liquid crystal screen through the LVDS interface, and the ARM processor is connected with the buzzer, the metal keys and the indicator light through an I2C bus, wherein multiple paths of GPIOs are expanded; the AD chip is connected with an AC/DC power supply module;

the AD chip collects analog data;

the optical fiber transceiver can realize the conversion of two different transmission media, namely a twisted pair and an optical fiber, so that the system can realize remote control by connecting the optical fiber with a remote controller;

the ARM processor controls a clock through the RTC chip;

the ARM processor stores parameters of the system through the FRAM flash memory;

the ARM processor adopts an ARM Cortex-A5 industrial wide-temperature chip of ATMEL company, 256MB of an external expansion 2 64M 16DDR2 chip is used as a system operation memory, wherein each chip is 16 bits wide, the two chips are combined into 32 bits wide, one chip is hung on a low 16-bit data bus, the other chip is hung on a high 16-bit data bus, and the 256M 8-bit SLC NandFlash chip is used for storing related contents;

the model of the optical fiber transceiver is TR-962D or UT-2177;

the network card chip of the system is connected with the Ethernet through the transformer and is connected with the network port of the computer end through the network port, and the computer can communicate with the system to achieve the control purpose.

Images