Failsafe device that monitors the operating status of the engine ignition

Abstract

The invention discloses a fault protection device for monitoring the working condition of an ignition device of an engine, and aims at providing the fault protection device capable of effectively eliminating the interference of working circuits of the ignition device. The technical scheme of the fault protection device is as follows: in a data processing comparison control circuit, a sampling module is in series connection with a signal processing module and a data processing control module in proper sequence; the data processing control module is electrically connected to a display module and is electrically connected to a primary power supply end of the ignition device by a fault protection module; the sampling module performs signal sampling from a sampling interface of the ignition device; the signal processing module is used for carrying out compensation filtering on sampled signals and for feeding read current peak values into the data processing control module; and the data processing control module is used for carrying out data comparison, analysis and judgment on sampling frequency and / or the current peak values, for giving out a fault warning signal instruction to the display module, and meanwhile for controlling the fault protection module to disconnect a primary power supply of the ignition device, so that the device enters a fault locking state, and a starting switch loses efficacy.

Description

technical field [0001] The invention relates to a working state sampling and fault protection device for an engine ignition device, in particular to a working state sampling and fault protection device for an aerospace engine ignition device in situ or in a laboratory environment. Background technique [0002] The aero engine is the heart of the aircraft, and the aero ignition system is one of the important components of the aero engine. Due to the existence of multiple constraints in the actual operation of the engine, the calibration of the electronic control unit will become a complex project with multiple variables, multiple constraints, and different optimization objectives. The engine ignition system is an ignition source system for the main combustion chamber and the afterburner composed of an ignition device, an ignition cable and an electric nozzle. After the ignition device converts the direct current or alternating current on the aircraft into high-voltage The ca...

AI Technical Summary

Problems solved by technology

However, the high voltage of the engine ignition device capacitor during charging and discharging, the strong impact interference caused by strong current and reverse negative high voltage, will greatly interfere with the logarithmic and analog sampling circuits, resulting in unstable and inaccurate sampling. can't even work

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