| 夏金东,黄海宁,张春华.超声波流量计换能器系统理论分析及应用[J].声学技术,2018,37(2):129~135 |
| 超声波流量计换能器系统理论分析及应用 |
| Theoretical analysis and application of the transducer system of ultrasonic flowmeter |
| 投稿时间：2017-05-14 修订日期：2017-07-10 |
| DOI：10.16300/j.cnki.1000-3630.2018.02.006 |
| 中文关键词: 流量测量 超声流量计 超声波换能器 |
| 英文关键词: flow measurement ultrasonic flowmeter ultrasonic transducer |
| 基金项目:国家自然科学青年基金资助项目（11304343） |
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| 中文摘要: |
| 为了使超声波流量计能够获得最佳的超声波信号，从理论上分析了超声波流量计的换能器系统，在此基础上提出了用收发电压灵敏度参数来表征换能器系统的综合发射和接收性能。采用等效网络理论，计算了超声波压电换能器的发射特性和接收特性，同时给出了收发电压灵敏度的表达式以及在流量计工作频率下换能器的最优设计准则。应用该准则设计并制作了适用于热量表的超声波换能器。实验结果表明：采用该设计理论研制的换能器系统可以使热量表在工作频率上获得最优的超声波信号，同时也证明了采用该理论设计的超声波流量计换能器系统的有效性。 |
| 英文摘要: |
| In order to provide high quality signal for ultrasonic flowmeter,the transducer system of ultrasonic flowmeter is analyzed in theory.Transceiving (transmitting and receiving) voltage sensitivity is proposed to characterize the synthetically transmitting and receiving performance of the transducers.Based on the equivalent networks theory,the characteristics of transmitting transducer and receiving transducer are calculated,and then the characteristics of the transducer system are given.By the analysis of the characteristics of the transducer system,the best design of transducers can be got at all operating frequencies.By using the above theory,the transducer system suitable for ultrasonic heatmeter is also designed,and the manufacture and experiment of the transducers are introduced.The results show that the heatmeter can get the optimal signal at all operating frequencies and also prove the validity of the theory used to design the transducers of the ultrasonic flowmeter system. |
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