Composite sensor and composite-sensor-based aircraft engine gas circuit fault detection and diagnosis method

Abstract

The invention provides a composite sensor. The radial section structure of the sensor comprises an outer layer, an inner layer and a middle layer; the outer layer comprises a metal shielding case for shielding and radial electrodes for fixing the structure and isolating detection electrodes, and one end of each of a plurality of radial electrodes is connected on the inner circumference of the metal shielding case in equal interval; the inner layer is a metallic conduit, and the other ends of the plurality of radial electrodes are connected on the metallic conduit; and the middle layer comprises a plurality of detection electrodes, and each detection electrode is arranged between two radial electrodes and fixed on the metallic conduit. The invention simultaneously provides a composite-sensor-based aircraft engine gas circuit fault detection and diagnosis method. By the new aircraft engine gas circuit parameter detection method provided by the invention, timely and comprehensive information is provided for the maintenance of an aircraft engine, and the aviation safety is promoted; and a theoretical and engineering design basis is provided for developing a novel aircraft engine gas circuit state monitoring instrument. The detection method is provided for multi-phase flow detection equipment under special environments and adopted in detection of high-temperature and large-size systems.

Description

technical field [0001] The invention relates to a detection device and its application, in particular to a composite sensor and a method for detecting and diagnosing an air path fault of an aeroengine based on the sensor. Background technique [0002] As the core component of the aircraft, the reliability of the aero-engine plays an important role in the flight process, and the health of the aircraft engine is directly related to the flight safety. Due to the complex structure of the aero-engine, high temperature, high-speed working conditions, frequently changing working conditions, and heavy alternating loads, its key components are prone to various damages. Severe engine damage often leads to engine failure and failure, and seriously threatens personal safety and flight safety. At the same time, the maintenance cost of aero-engines is usually very high, and the current regular maintenance will lead to a lot of waste of maintenance manpower, material resources and remaini...

AI Technical Summary

Problems solved by technology

[0008] In summary, as the key content of engine status monitoring and fault diagnosis, the detection method of gas path performance monitoring and component fault diagnosis still needs further research

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