Health Detection Technology Used on Unmanned Aerial Vehicle Based on Optical Fiber

At present, many flight tests of the new aircraft must be carried out by means of structural strength test. The method of resistance strain gauge is the effective method to measure strain in the flight test. However, the resistance strain gauge is used to measure strain, some questions occur. The workload of patch, welding line and sealing sheet is large and the efficiency is relatively low. When there are a large number of test points, the number of sensors and power supply wiring is relatively large, and the number of test channels is inevitably increased, resulting in the increase of the volume and weight of the test system. In addition, the resistance strain measurement method is greatly affected by environmental conditions, which affect the measurement accuracy and reliability. These problems are not well solved in the flight test. In the work, fiber Bragg grating sensors and resistance strain gauge are used to jointly monitor and compare the body strain in the loading process of unmanned aerial vehicle loading. The test shows that the fiber Bragg grating sensors can accurately monitor the strain of the unmanned aerial vehicle body with small errors, which demonstrate great potential in combat missions.