A high precision detection technique is analyzed based on the optical micro electro-mechanical system(MEMS)accelerometer with double gratings for noise suppression and scale factor enhancement.The brief sensing model ...A high precision detection technique is analyzed based on the optical micro electro-mechanical system(MEMS)accelerometer with double gratings for noise suppression and scale factor enhancement.The brief sensing model and modulation detection model are built using the phase sensitive detection,and the relationship between stimulated acceleration and system output is given.The schematics of gap modulation and light intensity modulation are analyzed respectively,and the choice of modulation frequency in the optical MEMS accelerometer system is discussed.According to the experimental results,the scale factor is improved from 15.45 V/g with the gap modulation to 18.78 V/g with the light intensity modulation,and the signal to noise ratio is improved from 42.95 dB to 81.73 dB.The overall noise level in the optical MEMS accelerometer is effectively suppressed.展开更多
基金supported by the National Natural Science Foundation of China(62205377).
文摘A high precision detection technique is analyzed based on the optical micro electro-mechanical system(MEMS)accelerometer with double gratings for noise suppression and scale factor enhancement.The brief sensing model and modulation detection model are built using the phase sensitive detection,and the relationship between stimulated acceleration and system output is given.The schematics of gap modulation and light intensity modulation are analyzed respectively,and the choice of modulation frequency in the optical MEMS accelerometer system is discussed.According to the experimental results,the scale factor is improved from 15.45 V/g with the gap modulation to 18.78 V/g with the light intensity modulation,and the signal to noise ratio is improved from 42.95 dB to 81.73 dB.The overall noise level in the optical MEMS accelerometer is effectively suppressed.
文摘换能元作为微机电系统(Micro Electro-Mechanical Systems,MEMS)火工品的核心部件,是MEMS火工品安全性和可靠性的重要影响因素,对整个武器系统的影响也是不可忽视的。文中从换能元的基底和电阻材料研究、结构设计等角度,综述了近年来MEMS火工品换能元的最新发展研究。介绍了MEMS火工品换能元的两大关键技术:MEMS火工品换能元的设计制备方法以及换能元性能参数的测试表征。指出:具有微型化、集成化、多功能化和高可靠性的MEMS火工品换能元是未来研究的热点。为M EM S火工品换能元的设计研究提供理论支撑,应加强微尺度下的热散失特性以及桥区电阻特性研究。认为复合含能薄膜桥换能元是MEMS火工品换能元的一个重要发展方向。
