Data transmitting circuit and data receiving circuit between aviation equipment

Abstract

The invention provides a data transmitting circuit between aviation equipment. The circuit comprises a level conversion circuit, an isolation circuit and an impedance matching circuit; one end of thelevel conversion circuit is connected with an FPGA, the other end of the level conversion circuit is connected with the isolation circuit, and the level conversion circuit is used for receiving a buslogic signal sent by the FPGA and converting the bus logic signal into a standard level signal; one end of the isolation circuit is connected with the level conversion circuit, the other end of the isolation circuit is connected with the impedance matching circuit, and the isolation circuit is used for isolating the standard level signal from a cable bus signal output by the impedance matching circuit; one end of the impedance matching circuit is connected with the isolation circuit, the other end of the impedance matching circuit is connected with external aviation equipment, and the impedance matching circuit is used for outputting cable bus signals and achieving impedance matching of the data sending circuit between the aviation equipment.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a data sending circuit and a receiving circuit between aviation equipment. Background technique [0002] During the working process of the aircraft, there is frequent data and command interaction between aviation equipment. Take the flight control computer and actuator control electronics as an example. During the entire aircraft working process, the actuator control electronics receives and processes the control stick, Signals such as steering wheel, pedals, air data, attitude information, flap position, and heading damping are sent to the flight control computer through the bus. After receiving the data, the flight control computer performs control law calculation based on these data , and send the calculated rudder surface control command to the actuator control electronics through the bus, so as to realize the control of the aircraft rudder surface. If ther...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a data transmission circuit and a reception circuit between aviation equipment, the method defines a set of bus protocol, the protocol introduces isolation design in the physical layer, and solves the common mode interference problem of data transmission in specific application scenarios , at the same time, the data transmission mode and the corresponding verification method are specified in the link layer to ensure high reliability and high security data transmission

Images