摘要
为了实现液位液压及温度三参数同时准确检测,本文首先采用光纤Bragg光栅(FBG)、弹性隔膜、微腔、FBG固定板及导气管构建了光纤隔膜传感器,搭建了测量系统。其次,建立了传感器测量理论模型,实验研究了传感器对液位、液压及温度的响应特性。最后,为了研究传感器对外界环境变化的抗干扰能力,实验研究了温度、倾角和液位动态变化速率对液位及液压测量结果产生的影响。研究结果表明:当液位变化速率为10~100 cm/min、传感器倾斜角度在-30°~30°范围、温度在20℃~60℃范围时,传感器输出信号与液位0~220 cm及液压0~22 kPa间具有线性关系,液位及液压测量结果不受液位变化速率、传感器倾角及温度变化的影响;传感器液位、液压及温度灵敏度分别为35.16 pm/cm、359.46 pm/kPa和10.07 pm/℃,最大相对误差为5.6%。
To accurately detect liquid level and pressure,a fiber optic diaphragm sensor and the measurement system are firstly prepared in this article.The sensor consists of fiber Bragg grating(FBG),elastic diaphragm,microcavity,FBG fixture and silica gel tube.Secondly,the theoretical model of the sensor to detect the liquid level and pressure is formulated,and the response characteristics of the sensor to the liquid level,pressure and temperature are experimentally studied.Finally,to study the anti-interference ability of the sensor to changes in the external environment,the effects of temperature,inclination angle and liquid level velocity on the measurement results of the sensor are experimentally studied.Results show that when the liquid level velocity is in the range of 10~100 cm/min,the sensor′s inclination angle is in the range of-30°~30°,and the tested liquid temperature is in the range of 20~60℃.A linear relationship between the sensor output and liquid level 0~220 cm and pressure 0~22 kPa is obtained.The measurement results of the sensor are not affected by liquid velocity,sensor′s inclination angle,and temperature change.The liquid level,pressure and temperature sensitivity of the sensor reach 35.16 pm/cm,359.46 pm/kPa and 10.07 pm/℃,respectively.The maximum relative error is 5.6%.
作者
姚建南
刘志成
钟年丙
何雪丰
张天恒
Yao Jiannan;Liu Zhicheng;Zhong Nianbing;He Xuefeng;Zhang Tianheng(Chongqing Key Laboratory of Optical Fiber Sensor and Photoelectric Detection,Chongqing Engineering Research Center of Intelligent Optical Fiber Sensing Technology,Chongqing University of Technology,Chongqing 400054,China;Engineering Research Center of Mechanical Testing Technology and Equipment,Ministry of Education,Chongqing University of Technology,Chongqing 400054,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2023年第2期146-153,共8页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金面上项目(52176178)
重庆市高校创新研究群体项目(CXQT21035)
重庆市自然科学基金创新发展联合基金(CSTB2022NSCQ-LZX0059)
重庆理工大学研究生创新项目(gzlcx20222032)资助
作者简介
姚建南,2019年于四川农业大学获得学士学位,现为重庆理工大学硕士研究生,主要从事光纤传感方面的研究。E-mail:yaojannan@163.com;通信作者:钟年丙,分别于2006年、2010年在重庆理工大学获得学士、硕士学位,在2013年获得重庆大学博士学位,现为重庆理工大学教授,主要从事光纤传感及光催化方面的研究。E-mail:zhongnianbing@163.com
