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图7 风速与两光栅波长差关系曲线
到测量误差如图8所示。传感器测量误差基本可控制在±0.3m/s
以内，符合煤炭行业标准对矿用风速传感器的要求
可通过选用刚度系数较小的波纹管和悬臂梁材料，以及增大波
纹管内、外径以及波纹数等方法提高传感器灵敏度，进一步减
小低风速段的测量误差。
图8 风速测量误差分布
五、结论
文中基于差压原理，设计了一种光纤光栅风速传感器，空
气流体通过差压结构体时，在两个取压口产生压力差，采用由
波纹管、等强度悬臂梁和双光纤光栅组成的敏感机构检测压差
值，并通过算法进一步进行温度补偿，克服了温度交叉敏感问
题，提高了测量精度。理论计算与水压法测量得到的敏感机构
灵敏度分别为0.711pm/Pa和0.703pm/Pa；两者具有较好的吻合
度。对传感器进行风洞试验，结果表明当风速为0.2~20m/s的情
况下，其测量误差基本在±0.3m/s以内。
参考文献
[1] Pan Jingtao, Zhao Dan, Li Zongxiang, et al. Fault source
diagnosis for ventilation system and air velocity
transducer placement in Daming Mine [J]. Journal of
China Coal Society, 2013, 38(S1): 153-158. (in Chinese)
[2] Wang Chang, Ni Jiasheng, Wang Jiqiang, et al. All-fiber
velocity sensors applicated in wind power generation
and their fabrication process [J]. Laser Technology,
2012, 36 (5): 689-692. (in Chinese)
[3] Liu G, Han M, Hou W. High-resolution and fast-response
fiber-optic temperature sensor using silicon Fabry-Pérot
cavity[J]. Opt Express, 2015, 23: 7237-7247.
[4] Ma Guoming, Li Chengrong, Jiang Jian, et al.
Development of fiber Bragg grating wind sensor for icing-
monitoring of overhead transmission lines [J]. Proceeding
of the CSEE, 2011, 31(13): 128-134. (in Chinese)
[5] Hu Yang, Zhu Heyuan. 1.55 μm all-fiber coherent
Doppler lidar for wind measurement [J]. Infrared and
Laser Engineering, 2016, 45(S1): S130001. (in Chinese)
[13] 。下一步
[6] Zhou W, Zhou Y, Dong X. Fiber optic curvature sensor
based on cladding mode Bragg grating excited by fiber
multimode interferometer [J]. , 2012, 4 (3): 1050-1057.
[7] Sun Huaiqing, Wang Jianzhong. Flow Measurement Throttling
Device Design Manual [M]. Beijing: Chemical Industry
Press, 2005. (in Chinese)
[8] Yang Baiyuan, Zhang Yitong. Engineering Elasticity and
Plasticity [M]. Beijing: China Machine Press, 2003. (in
Chinese)
[9] Wang Jiqiang, Zhao Lin, Liu Tongyu, et al . Novel
negative pressure wave based pipeline leak detection
system using fiber Bragg grating based pressure sensors
[J]. , 2016, 35(16): 3366-3373
[10] Di Sante Raffaella, Bastianini Filippo. Temperature
compensated fibre Bragg grating based sensor with
variable sensitivity [J]. , 2015, 75: 5-9.
[11] Li Yunkai . Metal Materials Science [M]. 2nd ed.
Beijing: Beijing Institute of Technology Press, 2006. (in
Chinese)
[12] Liao Yanbiao, Li Min, Zhang Min, et al . Optical Fiber
Sensing Techniques and Application [M]. Beijing: Tsinghua
University Press, 2009. (in Chinese)
[13] Standard coal mine wind speed sensor for coal industry
in People s Republic of China [S]. State Administration
of Work Safety, MT488-2008. (in Chinese)
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