Optical fiber inertial measurement unit 1553B communication interface circuit for launch vehicle

Abstract

The invention provides an optical fiber inertial measurement unit 1553B communication interface circuit for a launch vehicle, which is characterized by communicating by utilizing a 1553B bus interface protocol. The interface circuit performs hybrid programming by utilizing real-time embedded FPGA and standard VHDL language and schematic diagram so as to implement communication, information acquisition and information processes on an optical fiber inertial measurement unit interior circuit, and also transmits data information to a rocket-mounted computer of the launch vehicle via a 1553B bus. The optical fiber inertial measurement unit 1553B communication interface circuit for the launch vehicle overcomes the deficiencies of low transmission speed of the original RS422 bus interface and inflexibleness of a bus network, is connected with the rocket-mounted computer by utilizing an aerial 1553B bust protocol interface and utilizes two ports as mutual backups, thereby improving the reliability.

Description

technical field [0001] The invention relates to a communication interface circuit. Background technique [0002] In the field of aerospace applications, the RS422 bus is commonly used to transmit data such as sensing instruments to the central computer of the rocket for information communication. The RS422 bus uses a total of 5 wires, 2 for receiving and 2 for sending. There are fewer nodes on the transmission line, and a maximum of 10 nodes are allowed to be connected on the transmission line, that is, one master device and multiple slave devices, and the slave devices cannot communicate with each other. [0003] RS422 generally uses twisted pair wires, the maximum transmission distance is 1200 meters, the transmission rate is inversely proportional to the distance, the maximum distance rate is only 100kbps, compared with the 1553B bus, the transmission rate is lower, and the distributed processing capability is not strong. The anti-interference ability under the bus is no...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a communication interface circuit of optical fiber inertial group 1553B for launch vehicles, in order to ensure reliable communication between the optical fiber inertial group and the launch vehicle, to overcome the original RS422 The transmission rate of the bus interface is slow, and the bus network is not flexible enough. The aviation 1553B bus protocol interface is used to connect with the rocket-borne computer, and the two ports are used as backup for each other to improve reliability.

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