AD7656在四频差动激光陀螺信号检测系统中的应用

为实现四频差动激光陀螺的稳频控制等功能，需要快速精确测量陀螺的光强、电流和温度信号。使用单片6通道、16位AD转换芯片AD7656，与高性能DSP芯片TMS320F2812设计而成的检测系统，解决了XINTF接口数据传输等问题，并采用均值滤波方法，能有效、实时、精确地采样四频差动激光陀螺各种信号，大大降低陀螺测量控制电路的功率和体积。在10kHz的采样率下，系统测量信号精度可达10^-4量级。电路能够长期稳定工作，满足对陀螺信号的测量要求，达到预期目标。

Application of AD7656 in signal detection system for differential ring lasers

For achieving the frequency stabilization of differential ring lasers, the luminosity, electric current and temperature must be detected precisely and fast. The designed circuit is consisted of AD7656, with which 6-channel and 16-bit ADCs on a single chip , and TMS320F2812, a kind of DSP with high performance. By solving the prohlem of XINTF interface and using mean filtering , the system can sample signals of differential ring lasers in real time efficiently and precisely , and greatly reduce the power dissipation and size of gyroscope circuit. The result shows that cicuit can achieve accuracy of 10^-4 with 10 kHz sample rate , and work stably for long time, which suit the demand of gyroscope signal detecting , the expected requirement.