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A kind of complex environment test system and test method of blade based on fiber grating sensor

A fiber grating and testing system technology, which is applied in the direction of aircraft component testing, instruments, measuring devices, etc., can solve the problems of large floor space, high maintenance costs, etc., and achieve the effects of fast processing speed, good accuracy, and simple structure

Active Publication Date: 2022-04-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, this type of experimental device can only complete a single control variable experiment, and the experimental device occupies a large area and has high maintenance costs

Method used

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  • A kind of complex environment test system and test method of blade based on fiber grating sensor
  • A kind of complex environment test system and test method of blade based on fiber grating sensor
  • A kind of complex environment test system and test method of blade based on fiber grating sensor

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Effect test

Embodiment 1

[0037] The present invention is a blade complex environment testing system based on a fiber grating sensor. The system structure includes a water tank testing device and an optical measuring device. The water tank testing device includes a blade to be tested. The generating device is used to simulate the strain of the blade at different working temperatures and when the temperature changes suddenly; the optical measuring device includes a broadband light source transmitter, a fiber coupler, and a fiber grating wavelength demodulator, which are used to generate the samples required for testing light source.

[0038] Further, the water tank testing device includes a fixed test bench, a blade fixing clip, an acrylic water tank, and a water tank fixing clip;

[0039] The fixed test bench is provided with a blade fixing clip, and the blade fixing clip hangs the blade to be tested on the fixed test bench; the blade fixing frame can move with multiple degrees of freedom and can also ...

Embodiment 2

[0051] The present application also mentions the blade complex environment test method of the above-mentioned system, and the test method includes the following steps:

[0052] S1, before the experiment, paste the FBG sensor on the surface of the blade as required, and paste the sensor protective cover on the blade to cover the FBG sensor to prevent the sensor from being affected by external factors;

[0053] S2, connect the FBG sensor to the fiber coupler, and connect the fiber coupler to the broadband light source transmitter and the fiber grating wavelength demodulator respectively;

[0054] S3, connect the relevant pipelines of the water tank, the inlet of the liquid nitrogen cooling device and the outlet of the liquid nitrogen cooling device; the water outlet of the water tank and the water inlet of the water tank are respectively connected;

[0055] S4, connect related equipment, connect the temperature monitoring device with an external display, and install it on figur...

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Abstract

The invention discloses a blade complex environment testing system and testing method based on an optical fiber grating sensor. The system and method use a fixed test bench, an acrylic water tank, a pressure sensor, a vortex generator, a heating device, a liquid nitrogen cooling device, and a temperature monitoring device. , FBG (FIBER BRAGG GRATING, Fiber Bragg Grating) sensor, sensor protective cover, broadband light source transmitter, fiber optic coupler, fiber Bragg grating wavelength demodulator and other simple devices to control the ambient temperature, control the blade flow field, and control the centrifugal force of the blade and other elements, simulate the working scene of the blade under complex environmental conditions, and measure its response characteristics under complex environmental dynamic loads. The invention has the advantages of simple structure, low cost, convenient operation, high feasibility and many operable variables. In terms of measurement, it has high precision, good accuracy, and sensitive response, which can effectively reflect the characteristics of the blade when it is working. This invention is of great significance to the research of helicopters.

Description

technical field [0001] The invention relates to the intersection fields of instrumentation and science and helicopters, in particular to a blade complex environment test system based on a fiber grating sensor. Background technique [0002] The problem of dynamic load testing of helicopter blades in complex environments has always been an intractable problem that has plagued scientists in the related fields of helicopters. To solve this problem, a complex environment test system for blades based on fiber grating sensors was invented. There are many test devices in the helicopter blade test experiment, such as wind tunnel test device, vibration test device and rotary table, etc. [0003] However, this type of experimental device can only complete a single control variable experiment, and the experimental device occupies a large area and has high maintenance costs. Contents of the invention [0004] In view of the deficiencies of the above-mentioned prior art, the purpose of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/16B64F5/60
CPCG01B11/165B64F5/60
Inventor 王潇詹祺李博夏品奇
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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