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摘要
This paper presents a novel diaphragm-type fiber Bragg grating (FBG) force transducer with a high sensitivity through combining the axial property of the optical fiber and the transverse property of a circular diaphragm. The theoretical model of the presented sensor was derived, and its sensing characteristics were analyzed by numerical simulation and finite element analysis. A specimen of this type of sensor was manufactured with a 0.6mm-thickness diaphragm and a 0.1-ratio of the radius of the hard core and the outer radius of the diaphragm. Experiments were conducted to show that its experimental force sensitivity 441.84 pm/N was consistent with the theoretical value 422.4 pm/N within a working range of 0 similar to 4.9 N, which verified the effectiveness of the proposed theoretical model. Moreover, experimentally the designed transducer provided a broad flat frequency range from 0 to 200 Hz and a dynamic resolution of 0.15 mN.(Hz(-0.5)). The temperature cross-sensitivity of this sensor was suppressed effectively in the range of 16.7 degrees C similar to 53.6 degrees C after implementing the temperature compensation. Compared with the existing FBG force sensors, the proposed sensor provided higher and more easily adjustable sensitivity.
- 出版日期2018-2-1
- 单位武汉理工大学; 南阳理工学院
