汽车主动防撞系统的中频信号处理模块  

An IF Signal Processing Module for Automotive Active Anti-Collision System

作　　者：张鉴[1] 戚昊琛[1] 高伟清[1] 鲍嘉明[2] 

机构地区：[1]合肥工业大学电子科学与应用物理学院,合肥230009 [2]北方工业大学信息工程学院,北京100144

出　　处：《电子器件》2015年第5期1114-1119,共6页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目(11374084;61307056);合肥工业大学科学研究发展基金项目(J2014HGXJ0091;J2014HGXJ0082)

摘　　要：为对汽车主动防撞系统的核心硬件进行设计,需首先构建中频信号处理模块。在计算得到滤波及放大电路的关键参数后,基于双运放MC33078,设计实现了包含高通和低通两个单元的滤波电路。利用可调增益放大器AD603和静电计级运算放大器OPA128等设计实现了AGC环路,该环路同时包含可调增益放大器、峰值检波电路和AD/DA转换电路。对所设计的关键电路进行了模拟验证,并通过对静态目标的测距实验,验证了该中频信号处理模块对雷达测距的适用性和测试值相对于计算值的准确性。To design the hardcore of automotive active anti-collision system, intermediate frequency （IF）signal pro- cessing module must be developed. After the key parameters of filter and amplification are calculated, the filter cir- cuit including high-pass filter and low-pass filter is designed and realized based on double op-amp MC33078. Then the AGC loop is designed and realized based on adjustable gain amplifier AD603 and operational amplifier OPAl28. This AGC loop contains adjustable gain amplifier, peak detection circuit, and AD/DA switching circuit. Simulations of key circuits are performed, and the applicability and veracity of whole circuit module are confirmed by static target ranging experiment.

关 键 词：汽车主动安全 中频信号处理 滤波电路 AGC环路 

分 类 号：TN952[电子电信—信号与信息处理]