Digital Synthetic-heterodyne Interferometric Demodulation Based on Embedded System

查看全文 作　　者：MENG [1]Ju;WANG Jin-[1,2]hai;CHEN Cai-[2]he;ZHANG [1]Cheng

机构地区：[1]College of Information and Communication Engineering, Tianjin Polytechnic University, Tianjin 300160,CHN;[2]College of Precision Instrument and Optoelectronics Engineering, Key Laboratory of Optoelectronics Information Technical Science of EMC, Tianjin University, Tianjin 300072, CHN

出　　处：《Semiconductor Photonics and Technology》索引2006年第12卷第3期,共6页

基　　金：NationalScienceFoundationofTianjin,China(40274047) 摘　　要：Optical fiber acceleration seismometer as an important instrument can offer high sensitivity, anti-jamming and non-touched advantage which has an extensive application field. Its signal processing ability will decide whole system’s performance to some extent because it will affect directly the factors such as resolving power, precision and dynamic range. The signal processing is usually realized by analog circuits which was more inferior in stability, flexibility and anti-jamming to digital processing system. A digital processing system of optical fiber acceleration seismometer has been designed based on the embedded system design scheme. Synthetic-heterodyne demodulation has been studied, and signal processing has been realized. The double processors of ARM and DSP are employed to implement respectively the system control and signal processing, and to provide the output interfaces such as LCD, DAC and Ethernet interface. This system can vary with the measured signal in real time and linearly, and its work frequency bandwidth is between 10Hz and 1kHz. The system has better anti-jamming ability and can work normally when the SNR is 40dB. 关键词：光纤传感器嵌入式系统数字信号处理稳定性

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Digital Synthetic-heterodyne Interferometric Demodulation Based on Embedded System

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