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| 一种大量程超声波液位计的实现 | |
| 引用本文： | 么启,刘纪元,焦学峰,杨强,焦金峰.一种大量程超声波液位计的实现[J].电子设计工程,2011,19(22):57-61. |
| 作者姓名： | 么启 刘纪元 焦学峰 杨强 焦金峰 |
| 作者单位： | 1. 沈阳航空航天大学电子信息工程学院,辽宁沈阳,110136 2. 中国科学院声学研究所综合声纳实验室,北京,100080 3. 北京航瑞博泰科技有限公司,北京,100102 4. 河南义马煤气化集团,河南义马,472300 |
| 摘 要： | 为解决现有的超声波液位计测量量程小,在远距离测量时误差较大的问题,提出一种大量程超声波液位计的实现方法。在不改变超声波发射功率和接收增益的基础上,通过声阻抗变换的方法提高超声波在空气介质中的传播效率,以及利用匹配滤波提高远距离液面反射回波的信噪比。经过仿真及实际测试,此种方法效果显著,能将一种频率为40 kHz超声传感器的最大量程从5 m的提高至15 m,并仍可以较好的识别出液面反射回波信号。为远距离超声波液位测量提供了一种新方法。 |
| 关 键 词： | 超声波 液位测量 声阻抗 匹配滤波 |
A realization of large range ultrasonic level meter |
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| YAO Qi,LIU Ji-yuan,JIAO Xue-feng,YANG Qiang,JIAO Jin-feng.A realization of large range ultrasonic level meter[J].Electronic Design Engineering,2011,19(22):57-61. | |
| Authors: | YAO Qi LIU Ji-yuan JIAO Xue-feng YANG Qiang JIAO Jin-feng |
| Affiliation: | 1.Electronics and Information Engineering,Sheng yang Aerospace University,Sheng yang 110136,China;2.Institute of Acoustics,Chinese Academy of Science,Beijing 100080,China;3.Beijing Hangruibotai Science&Technology Co.,Ltd,Beijing 100102,China;4.Henan Yi’ma coal gasification Group,Yi’ma 472300,China) |
| Abstract: | To solve the existing problem that the range of ultrasonic level gauge is narrow and the error is relatively big in remote measurement,a realizing method for wide range ultrasonic level gauge is proposed.On the basis of no changing the transmission power and receiving gain,improve the dissemination efficiency of the ultrasonic in the air through acoustic impedance transformation,and increase the distance liquid surface reflection echo signal-to-noise ratio using matching filter.Through simulation and practical test,the method can effect significantly,and able to improve the maximum range of a ultrasonic sensor whose frequency is 40 kHz from 5 m to 15 m,and still able to identify the echo signal of liquid surface reflection.It provides a new method for long distance ultrasonic liquid level measurement. |
| Keywords: | ultrasonic liquid level measurement acoustic impedance matched filter |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
