超声波传感器特性分析与测试方法的研究  

Research on Ultrasonic Sensors Characteristics and Testing Method

作　　者：王翥[1] 刘春龙 罗清华 WANG Zhu;LIU Chunlong;LUO Qinghua(School of Information Science and Engineering,Harbin Institute of Technology at Weihai,Weihai 264209,China)

机构地区：[1]哈尔滨工业大学(威海)信息科学与工程学院,山东威海264209

出　　处：《郑州大学学报（工学版）》2020年第2期13-18,共6页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(61601142,61671174)。

摘　　要：一对超声波传感器性能的一致性直接影响流量计量精确度。针对不同的超声波传感器性能一致性差的问题,从其特性入手分析几项关系密切的参数对它的影响,并为用于同一个流量计的一对传感器的选择提供理论依据。同时,采用传输线路法、替代法以及变频激励信号等方法实现对超声波传感器的测试,并给出了实现测试的具体电路设计方法。实验验证表明,提出的测试方法稳定、可靠,测试性能一致性好的一对超声波传感器可以保证流量计量精确度。The accuracy of flow measurement could be affected by the consistency of the pair of ultrasonic sensors.In view of the problem of poor consistency of different ultrasonic sensors,this paper aimed to analyze the influence of several closely related parameters,and provide theoretical basis for the selection of the pair of sensors used in the same flowmeter.At the same time,the transmission line method,alternative method and variable frequency excitation signal were used to realize the test of ultrasonic sensors,and the specific circuit design method to realize the test was given.The experimental results showed that the proposed method was stable and reliable,and a pair of ultrasonic sensors with good test performance consistency could ensure the flow measurement accuracy.

关 键 词：超声波传感器 性能匹配 谐振频率 反谐振频率 谐振阻抗 反谐振阻抗 静态电容 

分 类 号：TP274.53[自动化与计算机技术—检测技术与自动化装置]