作　　者： ; ; ; ;

机构地区： 中山大学物理科学与工程技术学院

出　　处： 《大学物理》 2011年第6期52-56,共5页

摘　　要： 光纤传感器是20世纪70年代中期发展起来的一种新型传感器.它与普通的传感器相比,具有灵敏度高、抗电磁干扰、耐腐蚀、防燃等优点,因此在温度、应力、磁场等传感领域都有着广泛的应用.本文研究的光纤声波传感器,其基础为Mach-Zehnder(M-Z)全光纤干涉仪,我们主要的工作集中在传感臂探头的制作.所研制的基于M-Z干涉仪的单模光纤声波传感器,可以对声波的频率和声压级(输出电压峰谷差值)进行测量,频率响应范围为4～5000 Hz,涵盖了次声波段,动态响应范围上限为100 dBA. The optical fiber sensor is a new type of sensor developed in the mid-1970s, in comparison with or- dinary sensors, it has the advantages of high sensitivity, anti-electromagnetic interference, corrosion resistance, anti -burning, etc. Therefore, it is widely used in the sensor field of temperature, stress, magnetic. In this paper, a fiber-optic acoustic sensor is studied, which is based on an all-fiber interferometer, the main technical focuses on production of the probe in the sensing arm. By single-mode fiber acoustic sensor based on Mach - Zehnder in- terferometer, the frequency of sound waves and the sound pressure level （the output voltage difference between peak and trough） can be measured. The frequency response range is 4 N 5000 I-lz, covering the infrasound band, however, which is difficult for ordinary acoustic sensors to achieve. The upper limit of linear response range is 100 dBA.

关 键 词： 传感器 光纤声波传感器 相位调制 全光纤干涉仪

领　　域： [电子电信]