超声扩频测距系统数学建模  

Mathematical Modeling of Spread-Spectrum Based Ultrasonic Ranging System

作　　者：孟庆浩[1] 兰少莹[1] 姚振静[1] 李根旺[1] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072

出　　处：《压电与声光》2009年第4期575-577,581,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(60475028)

摘　　要：对超声扩频测距系统的数学建模问题进行了研究。首先,利用直流-直流(DC-DC)升压模块构造了超声换能器的发射与回声接收电路;其次,利用自回归滑动平均(ARMA)模型建立了此超声测距电路的输入-输出传递函数,并通过实验验证了传递函数的准确性。此模型的建立可便于超声扩频测距系统对脉冲编码和调制方式的选择,省去了繁琐的硬件验证。This paper addresses the mathematical modeling for spread spectrum based ultrasonic ranging system. First,a DC-DC set-up module based ultrasonic transmitting and echo receiving circuit is constructed. Then the transfer function for the ultrasonic transmitting and echo circuit is set up by using Auto-Regressive Moving Average （ARMA） model,and the correctness of the transfer function is verified through experiments. The model can facilitate the choice of pulse coding and modulation mode for the ultrasonic spread-spectrum ranging system, so the cumbersome hardware verification is not needed.

关 键 词：超声测距系统 扩频 编码 调制 自回归滑动平均模型 传递函数 

分 类 号：TN918.66[电子电信—通信与信息系统] P225.6[电子电信—信息与通信工程]