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Robust-fusion optic fiber distance and orientation integrated sensing technology

A robust-fusion optic fiber sensor technology of proximity distance and orientation integration is studied in this paper. A novel optic fiber sensing head with redundant information, which can measure distance and orientation in any pose as well as compensate fluctuation caused by changing parameters such as surface reflectivity, light intensity and characteristic shifting from photoelectric-converter device, is proposed. The implement method of sensor network compensation is introduced. An improved BP network arithmetic, which can enhance the dynamic characteristic and measurement accuracy of the sensing system, is presented. To speed up the convergence rate of BP network training, GA -BP training method is applied. An intelligent signal detecting and processing system based on DSP is designed, the strong data processing ability of DSP makes the system hardware structure simplified. The method of moderate output light power control is put forward for enlarging the measuring range. Experiment result shows that robust-fusion optic fiber proximity sensor system has the distance measuring range of 0.1~19.9mm and the orientation measuring range of 0~25°. The measuring time of each point is 92.5ms.