The Theory Research And Design Of A Photoelastic Fiber Optic Accelerometer

This paper describes a photoelastic fiber optic force transducer and a photoelastic fiber optic accelerometer's application, construction, design principles, design and simulate experimentation and test. The photoelastic fiber optic accelerometer relies on a photoelastic fiber optic force transducer made from an optically briefringement material and measurements are made based on the principles of photoelasticity. The transducer deals data with differential principles which can compensate random errors.The photoelastic fiber optic force transducer is designed to measure the pressure of deep wells and bottoms of storage tanks. With simple structure, small outside dimensions,light weight an can be operated easily. Moreover connected with computers, it can work very rapidly and accurately because data can be calculated by computers, and it also help factories to be managed by computers. It has a high sensitivity and a wide measurement range. It is sealed and electricity isolated, so it can be immune to fire and explosion, it is completely safe and credible. If we make some changes to the detector's loading structure of the photoelastic fiber optic force transducer and use a seismic mass supported by a spring element which produces single-axis stress concentration to the sensing element. The photoelastic fiber optic force transducer then becomes a photoelastic fiber optic accelerometer. The photoelastic fiber optic accelerometer can be used to seism measurement. Moreover, it can be widely used in the field of aviation, inertial navigation, earthquake inspection and so on.The main work includes:1. The photoelastic fiber optic accelerometer is theoretically studied. We explain simply the principle of optic fiber sensor and the theory of polarization optical interfence.2. The vibration system and the loading structure of the transducer is detailedly analyzed and calculated. The interfence optical path of the photoelastic fiber optic accelerometer is designed.3. The mechanical drawing of the detector is designed. 4. Through theoretic calculate, we get the sensitivity and frequency range of the transducer.