| 一种基于互易原理的超声功率新测量方法 |
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| 引用本文： | 寿文德.一种基于互易原理的超声功率新测量方法[J].应用声学,1996,15(4):6-9,46. |
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| 作者姓名： | 寿文德 |
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| 作者单位： | 上海交通大学仪器工程系!上海，200030 |
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| 摘 要： | 本文从换能器的互易原理出发，利用平面波自易校准法获得换能器的自由场发送电流响应．根据平面活塞型换能器的衍射规律，推导出发射声功率的表达式．由此计算互易换能器在给定驱动电流（或电压）作用下的辐射超声功率．基于上述原理，使用自易校准装置测量了互易换能器的声功率一频率曲线．估计的测量不确定优于±20％．
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| 关 键 词： | 超声功率 测量 互易校准 声功率 |
A new measurement method of ultrasonic power based on reciprocity principle |
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| Shou Wende.A new measurement method of ultrasonic power based on reciprocity principle[J].Applied Acoustics,1996,15(4):6-9,46. |
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| Authors: | Shou Wende |
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| Affiliation: | Inportmeat of Instrumentation Enginerring Shanghai Jiaotong University Shanghai 200030 |
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| Abstract: | A new measurement method of ultrasonic power has been developed in Shanghai Jiaotong University. The free field transmitting current response of a transducer can be obtained by using the method of plane wave self-reciprocity calibration- In accordance with the diffraction field property of a plane piston transducer, the transmitting acoustic power formula is derived to calculate the radiation ultrasonic power of the reciprocal transducer under a given driving current or voltage. The measuring arrangement and procedure are explained. The acoustic power versus frequency of a reciprocal transducer is given.The estimated measuring uncertainty of this method is ±20%. |
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| Keywords: | Ultrasonic power measurement Self-reciprocity calibration Transmitting current response |
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