光电加速度传感器非对称3×3解调系统SOPC设计  

Asymmetrical 3×3 Coupler Demodulated System of Optical-Eectronic Accelerometer Based on SOPC

作　　者：王金海[1] 陈才和[1] 张诚[2] 张波[2] 岳泉[2] 

机构地区：[1]天津大学精密仪器与光电子工程学院 [2]天津工业大学信息与通信工程学院,天津300160

出　　处：《传感技术学报》2007年第3期502-506,共5页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金资助"光电集成加速度地震技术理论和实验研究"(40274047)

摘　　要：介绍了集成光学芯片、光纤质量块简谐振子和可编程片上系统(SOPC)混合集成光学加速度计的设计方法.采用基于3×3耦合器的干涉系统进行光相位的调制.研究了在非对称情况下的解调算法,从而解决了由于非对称性造成解调结果失真的问题.应用SOPC技术设计和实现数字信号处理系统,实现信号处理与数据传输的并行工作,实验证明该系统可以实时、线性地跟踪到加速度信号.实际测量灵敏度为4.62V/gn,工作频带为1-1066Hz.It is described that the hybrid-integrated optical accelerometer is made of integrated opotical chip, the harmonic oscillator composed of fiber optic proof mass and system programmable on chip. The optical phase is modulated by the interferometric system of 3 × 3 coupler. The asymmetry demodulated arithmetic is researched, thus the problem of distortion is resolved, which is arose by asymmetry coupler. Finally the digital signal proseccing system is designed with SOPC technology. And DSP and data communication run in parallel. When practically measured, a real time and linear acceleration signal is detected. The practical sensitivity is 4.62V/gn and the system works between 1Hz and 1066Hz.

关 键 词：加速度 灵敏度 非对称3×3耦合器 可编程片上系统 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]