低功耗超声波风向风速传感器设计  

Design of Low-Power Ultrasonic Wind Sensor

作　　者：杜伟略[1] 谈向萍[1] 

机构地区：[1]无锡职业技术学院江苏省教育厅传感网工程技术研究中心,江苏无锡214121

出　　处：《测控技术》2013年第9期12-15,共4页Measurement & Control Technology

基　　金：2012年度江苏省高校科研成果产业化推进项目(JHZD2012-27)

摘　　要：介绍了超声波时差法风速测量的基本原理,以及基于CPLD+MSP430低功耗测量风向风速传感器的实现方法。设计了超声波发射驱动和部分接收电路,分析计算了二阶有源巴特沃斯带通滤波器。提出了采用峰值包络检波识别超声波到达时刻,以及CPLD高速计数的方法,实现高精度测量方法,并且详细叙述了超声波测风的实现过程。实验结果验证系统具有精度高、功耗低等特点和推广应用价值。The basic principle of time difference method used in the ultrasonic measurement system, and the low power implementation of wind sonsor based on CPLD and MSP430 are introduced. The ultrasonic emission drive and part of the receiving circuit are provided, the second-order active Butterworth bandpass filter is calculated. For high precision measurement, the method of the peak envelope detection that is used for recognizing the ultrasonic arrived time is proposed, and method of CPLD for high speed counting is also proposed. The realization process of ultrasonic meacuring wind is described in detail. Experimental results show that the system has high precision and low power consumption, which is worthy spreading.

关 键 词：超声波 低功耗 CPLD MSP430 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]