Blocking device and method for onboard collision avoidance system

Abstract

The invention provides a blocking device and method for an onboard collision avoidance system. The blocking device mainly comprises an FPGA chip, an amplifying circuit, a high-pass filtering circuit, a voltage reducing chip and an isolating chip. The blocking method comprises the following steps: outputting an A / C mode blocking signal after an A / C mode or full-calling mode P3 triggering signal output by a collision avoidance system decoder is received; and if a full-calling mode P4 triggering signal output by a collision avoidance system decoder is received within a certain time range, stopping the continuous outputting of the A / C mode blocking signal, and otherwise, continuously outputting the A / C mode blocking signal. According the blocking device and the blocking method, the blocking lead output by the onboard collision avoidance system can be regulated according to the requirements, and a lag value of an output blocking signal can be regulated, so that the problem of blocking with other same-frequency band avionics subsystems such as navigation and radar alarms after the signal passes through blocking comprehensive crosslinking equipment of an avionics system is flexibly solved, the radio frequency interference is reduced, and the mounting adaptability of the equipment is improved.

Description

technical field [0001] The invention relates to the field of aircraft avionics systems, in particular to a locking device and method for an airborne collision avoidance system. Background technique [0002] The stability and reliability of aircraft avionics system are very important, and the anti-jamming performance of the system is an important indicator of system reliability. Avionics system equipment ranges from several MHz, dozens of MHz to GHz poles, and there are several subsystems in the same frequency band, which will generate a lot of radio frequency interference. Among them, the receiving frequency and transmitting frequency of the airborne collision avoidance system and the navigation, radar alarm and other subsystems are in the same frequency band, which will generate a lot of radio frequency interference. [0003] The A-mode interrogation signal of the airborne collision avoidance system is as follows: figure 1 shown. The C-mode interrogation signal of the ai...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a locking device and method for an airborne collision avoidance system in view of the problems existing in the prior art, so as to solve the problem that the locking advance radio frequency signal output during mode A and C mode response coding does not meet the requirements of the integrated communication system of the avionics system. Requirements for other avionics systems in the same frequency band, such as locking navigation and radar warning devices, etc.

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