文档介绍：第39卷第9期 2013年9月工矿自动化Industry and Mine 文章编号:1671-251X(201309-0023-05 DOI:.1671-,倪鹏昊,[J].工矿自动化,2013,39(9:23-,2, 倪鹏昊1, 陈树越1,2(,江苏常州 213164;,江苏常州 213164 摘要:针对现有超声波液位检测方法存在安装时需对容器开孔,从而破坏容器结构和声波受挥发性介质影响的问题,设计了一种非接触式超声波液位传感器,分析了传感器超声波频率的选取并给出了具体硬件电路的实现方案。该传感器根据超声波液位检测原理,以AT89S52为控制核心,采用收发一体超声波换能器,选取nRF2401作为无线收发模块,实现了密闭容器内液位数据的测量与无线传输。测试结果表明,该传感器测试精度较高,相对误差在3%以内,满足了现场液位实时测量的需要。关键词:密闭容器;液位检测;超声波传感器中图分类号:TD679 文献标志码:A 网络出版时间:2013-08-27 17:45 网络出版地址:s/detail/ of ultrasonic liquid level sensor for sealed containerLU Gui-rong1,2, NI Peng-hao1, CHEN Shu-yue1,2( of Information Science and Engineering,Changzhou University,Changzhou 213164,China; Laboratory for Process Perception and Interconnected Technology,Changzhou 213164,China Abstract:In view of problem that existingultrasonic liquid level detection methods need to open doorof container in process of installing,so as to damage the container structure and affect sound wave becauseof volatile medium,a non-contact ultrasonic liquid level sensor was of ultrasonicfrequency of the sensor was analyzed,and hardware circuit implementation scheme of the sensor was to principle of ultrasonic liquid level detection,the sensor takes AT89S52as core controlchip,uses ultrasonic transducer with transceiver and selects nRF2401as wireless transceiver module torealize level measurement and data transmission of sealed test results show that the sensorhas high precision and relative error is within 3%,which meets needs of real-time measurement of words:sealed container;level measurement;ultrasonic sensor收稿日期:2013-02-04。基金项目:国家自然科学基金资助项目(51176016。作者简介:陆贵荣(1968-,男,甘肃定西人,副教授,主要研究方向为传感器技术,已获国家发明专利5项,E-mail:guironglu001@。0 引言密封容器内部液位的检测通常采用非接触测量方法。随着电子计算机、光纤、超声波等高科技技术的发展,出现了种类多样的液位测量手段[1]。一般的非接触超声波液位检