基于温度自适应的超声波渡越时间测量方法研究
|
摘要
该文对超声波换能器模型法、噪声抑制法和渡越时间法的优缺点进行分析,针对其不足提出一种基于温度自适应的超声波渡越时间测量方法,采用两对换能器分别与中轴线垂直、成锐角安装,对换能器模型分析、滤波算法、自适应跟踪算法研究,得到压电-电压等效数学模型完成辨识;通过等效模型完成自适应滤波算法、基于阈值法及互相关理论完成渡越时间自动跟踪算法设计。通过实验数据验证本方法对解决超声波传播衰减大、声学噪声干扰严重等问题是可行的。
The advantages and disadvantages of model method,noise suppression method and time-of-flight method of ultrasonic transducer are analyzed,and a temperature-adaptive method for measuring time-of-flight is proposed. Two pairs of transducers are installed vertically and acutely with the central axis respectively. The transducer model analysis,filtering algorithm and adaptive tracking algorithm are studied,and the piezoelectric-voltage equivalent mathematics is obtained. The identification of the model is completed,and the adaptive filtering algorithm,the automatic tracking algorithm of the transit time based on threshold method and cross-correlation theory are designed by the equivalent model. The experimental data prove that this method is feasible to solve the problems of large attenuation of ultrasonic propagation and serious acoustic noise interference.
The advantages and disadvantages of model method,noise suppression method and time-of-flight method of ultrasonic transducer are analyzed,and a temperature-adaptive method for measuring time-of-flight is proposed. Two pairs of transducers are installed vertically and acutely with the central axis respectively. The transducer model analysis,filtering algorithm and adaptive tracking algorithm are studied,and the piezoelectric-voltage equivalent mathematics is obtained. The identification of the model is completed,and the adaptive filtering algorithm,the automatic tracking algorithm of the transit time based on threshold method and cross-correlation theory are designed by the equivalent model. The experimental data prove that this method is feasible to solve the problems of large attenuation of ultrasonic propagation and serious acoustic noise interference.
引文
[1]黄宝娟,于德弘,高振华.超声波气体流量计关键技术综述[J].计量技术,2007(1):18-22.
[2]何永全.流量检测技术和传感器设计若干趋势[J].中国新技术新产品,2012(24):116.
[3]姜燕丹,王保良,黄志尧,等.基于模型的超声波渡越时间测量方法研究[J].工程热物理学报,2015,36(7):1501-1504.
[4] A. M. Sabatini.A digital-signal-processing technique for ultrasonic signal modeling and classification[J].IEEE Transaction on Instrumentation and Measurement,2001,50(1):15-21.
[5]官慧峰,曹丽.自适应滤波在超声波气体流量计信号去噪中的应用[J].仪器仪表学报.2010,31(8):159-162.
[6]顾宇,周康源,宁晨,等.宽量程的气体超声测量[J].数据采集与处理,2004,19(3):356-360.
[7]汪伟,徐科军,方敏,等.一种气体超声波流量计信号处理方法研究[J].电子测量与仪器学报,2015,29(9):1365-1373.
[8] W. H. Li,Q. Chen,J.T. Wu.Double threshold ultrasonic distance measurement technique and its application[J].Review of Scientific Instruments,2014(85):044905.
[9]李跃忠.多声道超声波气体流量测量关键技术研究[D].武汉:华中科技大学,2009.
[10]王铭学,王文海,田文军,等.数字式超声波气体流量计的信号处理及改进[J].传感技术学报,2008,21(6):1011-1013.
[11]季涛.时差法多声道气体超声波流量计的研究[D].杭州:浙江大学,2017.
[12]余厚全,黄载禄,屈万里.基于RLS算法的超声换能器温度压力特性校正[J].仪器仪表学报,1997(4).
[13]黄峰,金生龙,吴家瑜,等.基于LMS的超声换能器温度补偿仿真[J].传感器世界,2011(5):19-22.
[14]金生龙,刘赞毅,黄峰,等.超声波测距中多径效应的仿真研究[J].传感器世界,2011(1):29-31.
[2]何永全.流量检测技术和传感器设计若干趋势[J].中国新技术新产品,2012(24):116.
[3]姜燕丹,王保良,黄志尧,等.基于模型的超声波渡越时间测量方法研究[J].工程热物理学报,2015,36(7):1501-1504.
[4] A. M. Sabatini.A digital-signal-processing technique for ultrasonic signal modeling and classification[J].IEEE Transaction on Instrumentation and Measurement,2001,50(1):15-21.
[5]官慧峰,曹丽.自适应滤波在超声波气体流量计信号去噪中的应用[J].仪器仪表学报.2010,31(8):159-162.
[6]顾宇,周康源,宁晨,等.宽量程的气体超声测量[J].数据采集与处理,2004,19(3):356-360.
[7]汪伟,徐科军,方敏,等.一种气体超声波流量计信号处理方法研究[J].电子测量与仪器学报,2015,29(9):1365-1373.
[8] W. H. Li,Q. Chen,J.T. Wu.Double threshold ultrasonic distance measurement technique and its application[J].Review of Scientific Instruments,2014(85):044905.
[9]李跃忠.多声道超声波气体流量测量关键技术研究[D].武汉:华中科技大学,2009.
[10]王铭学,王文海,田文军,等.数字式超声波气体流量计的信号处理及改进[J].传感技术学报,2008,21(6):1011-1013.
[11]季涛.时差法多声道气体超声波流量计的研究[D].杭州:浙江大学,2017.
[12]余厚全,黄载禄,屈万里.基于RLS算法的超声换能器温度压力特性校正[J].仪器仪表学报,1997(4).
[13]黄峰,金生龙,吴家瑜,等.基于LMS的超声换能器温度补偿仿真[J].传感器世界,2011(5):19-22.
[14]金生龙,刘赞毅,黄峰,等.超声波测距中多径效应的仿真研究[J].传感器世界,2011(1):29-31.