电光与控制, 2015, 22 (3): 72, 网络出版: 2015-03-23  

一种激光陀螺惯导仪表信号采集电路设计

Design of a Signal Acquisition Circuit for Laser Inertial Navigation Instrument
作者单位
长沙南方职业学院, 长沙 410208
摘要
在激光惯导系统设计中, 惯导仪表信号采集电路需要具备高精度采集惯性仪表信号和体积小的特点。介绍了一种简单且精度高、体积小的信号采集电路设计方法, 该方法采用FPGA对激光陀螺输出信号进行采集和FIR滤波, 采用I/F电路对石英挠性加速度计输出的电流信号进行转换, 利用FPGA进行可逆计数从而转变为加速度计信号值。详细介绍了惯导仪表信号采集电路硬件和软件设计过程, 包括I/F电路设计、FIR低通滤波器设计等, 最后通过试验验证设计的正确性。
Abstract
In the laser inertial navigation system signal acquisition circuit is required to have high acquisition precision and small size.A simple method for designing data acquisition circuit with high precision and small size is presented here.FPGA is used in the method for acquiring laser gyro output signal and FIR filtering and I/F circuit is used to convert the quartz flexible accelerometer output current signal into frequency signal.The paper describes the design process of the circuit hardware and software of the signal acquisition circuit including I/F circuit design and FIR low-pass filter design.The correctness of the design is verified through a final experiment.

周琪. 一种激光陀螺惯导仪表信号采集电路设计[J]. 电光与控制, 2015, 22(3): 72. ZHOU Qi. Design of a Signal Acquisition Circuit for Laser Inertial Navigation Instrument[J]. Electronics Optics & Control, 2015, 22(3): 72.

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