Composite material sensor for detecting oil leakage of pipeline

Abstract

The invention belongs to the field of the aviation oil leakage detection, and provides a composite material sensor for detecting oil leakage of a pipeline. The composite material sensor comprises a sensing element which is expanded when in oil, a first fixed disc, a second fixed disc, an optical-fiber grating, a first optical-fiber grating fixed armor, a second optical-fiber grating fixed armor, alimiting screw rod and an optical-fiber grating demodulator, wherein the sensing element wraps a pipeline interface, the first fixed disc and the second fixed disc sleeve the pipeline, the limiting screw rod is arranged between the first fixed disc and the second fixed disc, and two ends of the optical-fiber grating are fixed after penetrating through the first optical-fiber grating fixed armor and the second optical-fiber grating fixed armor. By adopting the composite material sensor for detecting the oil leakage of the pipeline, the real-time monitoring for the oil-leaked pipeline can be realized; and moreover, more rapidness and convenience in detection can be realized, the sensitivity and safety are higher, and a great amount of man power and material resources can be saved.

Description

technical field [0001] The invention belongs to the field of aviation oil leakage detection, in particular to a composite material sensor used for pipeline oil leakage detection. Background technique [0002] The fuel delivery part of the aircraft fuel system is composed of basic accessories such as fuel tanks, fuel pumps, and fuel pipelines. The fuel system generally connects multiple primary fuel tanks in series with a secondary fuel tank installed next to the engine, and then connects them in a certain order. The fuel in each primary fuel tank enters the secondary fuel tank through the fuel transfer pump or pressurized air, then passes through the fuel transfer pump from the secondary fuel tank, and then is delivered to the engine through the fuel transfer pipeline. Therefore, the interface between the fuel pump and the oil pipeline, the interface between the fuel tank and the oil pipeline, and the oil pipeline itself all have the possibility of oil leakage. [0003] The...

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Problems solved by technology

[0008] It can be seen from the above records that most of the existing fuel system oil leakage detection methods are cumbersome and cost a lot of manpower and material resources, and the detection sensitivity is low. If air is mixed during detection, it may even cause an explosion, so there is still a certain degree of danger.

Moreover, these methods require frequent periodic inspections

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