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

Control system of TACAN navigation equipment

Technical Field

The utility model relates to a control system of TACAN navigation equipment for communication and control of devices such as TACAN navigation equipment and DME.

Background

In recent years, with the increasing number of airport navigation devices at home and abroad, the requirements on the devices are higher and higher. The control circuit of the control system of the previous generation of the TACAN equipment is a singlechip plus FPGA framework, the communication speed is low, the communication response is slow, the external interfaces are serial ports and IO, the connector is complex and large in size, software is foreground and background programs, the real-time performance is poor, and the interference is easily caused, so that the subsequent development and the function upgrade of products are limited. In response to this situation of the current devices, the relevant developers have been studying how to solve and optimize.

Disclosure of Invention

In view of the deficiencies in the prior art, the utility model relates to a control system of TACAN navigation equipment, this system commonality is good, scalability is good, stability is strong, communication rate is high, and communication response is fast, small, interference immunity is strong.

The utility model adopts the technical proposal that: 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 bit wide, two chips are combined into 32 bit 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 8bit SLC NandFlash chip is used for storing related programs;

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.

The utility model has the advantages that: the utility model discloses a control system is the dispatch maincenter of each unit coordination complex of equipment, has information acquisition, information processing, information transmission and information storage's function concurrently. The control system of the previous generation needs a special peripheral chip to implement, which occupies a large amount of resources.

The control system has the advantages of good expandability, clear control logic, high communication speed, multiple modes and good performance, and the serial port communication rate and the CAN port communication rate are improved compared with the prior generation.

The system provides a good human-computer interface, and remote control of the TACAN system can be realized through the remote controller. The control system of the prior generation does not have a remote controller and can not realize remote control.

The system cost is reduced, and the selected raw materials are stable and reliable industrial devices on the market, so that the purchase period and the production period are both shortened, and the cost is reduced by 30 percent compared with the cost of the control system of the prior generation. Due to the optimized upgrade of components, the volume of the system is also reduced, and the installation, debugging and maintenance are more convenient.

After the system is successfully researched and developed, the system is quickly used in the Takang equipment, is more suitable for the requirement of the environment, is also applied in some complex environments, and is more suitable for long-time work at low temperature than the control system of the prior generation.

In a word, the control system has a network communication function, a CAN communication function, a serial communication function, an IO control acquisition function, an AD acquisition function and a display function. The control system has the advantages of good universality, good expandability, strong stability, high communication rate, fast communication response, small size and strong anti-interference performance, CAN be used for various navigation devices such as TACAN, DME and the like, has multiple interfaces and complete functions, and CAN meet various communication modes such as 232, 422, CAN, SPI, network, optical fiber and the like.

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

Drawings

Fig. 1 is a circuit connection block diagram of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Referring to fig. 1, a control system of a tacan navigation device includes a DC/DC power 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, a metal key and an indicator light; the control system is composed 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 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 the 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 AD chip collects analog data;

the optical fiber transceiver adopts a TR-962D model optical fiber transceiver of the Union technology Limited company or a UT-2177 model optical fiber transceiver of Shenzhen Yuntai science and technology Limited company, can realize the conversion of two different transmission media of a twisted pair and an optical fiber, can realize remote control by connecting the remote controller through the optical fiber, the control system is provided with a network port and is connected with the network port of the optical fiber transceiver, the remote controller is connected to an optical fiber interface of the optical fiber transceiver through the optical fiber, and can realize communication with the remote controller, and the remote controller is remote control equipment with an optical fiber interface;

the ARM processor controls a clock through the RTC chip;

the ARM processor stores parameters of the system through the FRAM flash memory, wherein the parameters comprise related startup parameters of the system, related version information of the system, alarm threshold parameters and the like.

The ARM processor adopts an ARM Cortex-A5 industrial wide-temperature chip of ATMEL company, and 256MB of an external expansion 2 64M 16DDR2 chip as a system operation memory, wherein each chip is 16 bits wide, two chips are combined into 32 bits wide, one chip is hung on a low-16 bit data bus, and the other chip is hung on a high-16 bit data bus. The 256M by 8bit SLC NandFlash chip stores relevant parameter contents including boot contents, a kernel, a file system and the like required by system startup.

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.

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

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 protocol, is used as a TCP/UDP server or client to access the network, and adopts the network communication function and maintenance software to communicate in the TACAN and ranging equipment, thereby facilitating debugging and maintenance.

The control system obtains the working state of each working unit, namely normal or fault information, from each working unit board, can obtain the working state information of each power supply from each power supply output, can collect the voltage of each power supply, can display and inquire the information through maintenance software and a liquid crystal display, and can set parameters for the system through the maintenance software.

The control system realizes data communication with the remote controller through the optical fiber transceiver, realizes the state control of the remote control equipment on the local equipment and the reading of the state information of the local equipment, and can communicate with the remote controller by using the wireless module under the condition of not connecting the optical fiber.

2) The CAN communication thread has the main functions of communicating with the monitor, the receiver and the transmitter coding unit through the CAN interface, the control system sends control, inquiry or setting instructions to the receiver, the monitor and the transmitter coding unit through the CAN bus and displays the instructions, and simultaneously receives various monitoring parameters transmitted by the monitor on the CAN bus in real time and responds in time, including the operations of warning LED lamp display and warning sound.

3) The control system performs RS232 serial communication, can compile a communication protocol according to specific application, realizes a complete serial communication function, and realizes serial communication with the compass module, the Beidou module and the wireless module in the equipment.

4) The I/O control collection thread, the control system carries out input collection and output control of digital quantity through an input/output unit expanded by an I2C bus, the maximum IO quantity can reach 256 paths, and the signals are adopted for the alarm and bypass of a monitor, the on-off signal of a transmitter, a buzzer, a metal key and the information of an indicator light.

5) And in the AD acquisition thread, analog data are acquired by using an AD chip AD7992 in analog input, the input resolution is 12 bits, the maximum 19-channel analog signal acquisition function can be achieved by matching with an external expansion chip, namely 12 channels of external AD plus 7 channels of internal AD, filtering is performed, and finally the functions of alarming, outputting and storing are realized according to application requirements.

The display process in the system application program mainly completes the display task and displays the related content, the system is provided with a display interface, a liquid crystal screen is expanded to display, and 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.

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