Aircraft fuel oil oil-amount measurement system based on fiber bragg grating sensor

Abstract

The invention relates to an aircraft fuel oil oil-amount measurement system, especially discloses an aircraft fuel oil oil-amount measurement system based on a fiber bragg grating sensor, and pertains to the technical field of sensors and measurement. The system comprises an outer shell and an elastic membrance A, an elastic membrance B, a FBG grating A and a FBG grating B which are arranged in the outer shell. The FBG grating A is attached to the lower portion of the elastic membrance A. The FBG grating B is attached to the upper portion of the elastic membrance B. In order to compensate influences of the temperature on the period of the FBG gratings, an insulating layer is arranged under the elastic membrance B, and a gap exists between the elastic membrance B and the insulating layer. The system of the invention has the following advantages that 1, advantages of high sensor measurement accuracy, high safety, small size, simple structure and light weight can be realized, the oil level detection problem with the aircraft in the accelerated lifting and lowering process can be solved, and the level sloshing problem can be solved through the filtering method; 2, and the fuel oil density can be obtained while measuring the oil level.

Description

[0001] technical field [0002] The invention relates to an aircraft fuel oil volume measurement system, in particular to an aircraft fuel oil volume measurement system based on a fiber grating sensor, and belongs to the technical field of sensors and measurements. Background technique [0003] In terms of aircraft fuel oil quantity measurement, capacitive fuel level sensors are mainly used at present, but this kind of sensor is not accurate and heavy, and is easily interfered by external electromagnetic signals. In terms of liquid level measurement, there is a new type of sensor that is small in size, light in weight and free from electromagnetic interference. It is an optical fiber sensor. The representative ones are optical fiber sensors and fiber grating sensors based on the microbend principle, but the mechanical structure of the former is more complicated. It is not easy to obtain high measurement accuracy, and the latter has high measurement accuracy, and the structu...

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Problems solved by technology

[0003] In terms of aircraft fuel oil measurement, capacitive fuel level sensors are mainly used at present, but this kind of sensor is not accurate and heavy, and is easily interfered by external electromagnetic signals

In terms of liquid level measurement, there is a new type of sensor that is small in size, light in weight and free from electromagnetic interference. It is an optical fiber sensor. The representative ones are optical fiber sensors and fiber grating sensors based on the microbend principle, but the mechanical structure of the former is more complicated. It is not easy to obtain high measurement accuracy, and the latter has high measurement accuracy, and the structure of the signal processing circuit is complex, and it is necessary to compensate the influence of oil temperature and air pressure

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