The considerations and guides of the wattmeter method for measuring output acoustical power of Langevin-type transducers - I: theory

被引：3

作者：

Yan, ZY ^{[1
]}

Fang, QP ^{[1
]}

He, BX ^{[1
]}

Huang, JL ^{[1
]}

Lin, ZM ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Acoust, Beijing 100080, Peoples R China

来源：

ULTRASONICS | 1997年 / 35卷 / 07期

基金：

中国国家自然科学基金;

关键词：

acoustic parameters measurement; power ultrasonics; ultrasonic liquid processing; vibration velocity;

D O I：

10.1016/S0041-624X(97)00026-7

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The vibrational amplitude ratios of a number of positions in some typical vibration systems under different loads, especially of amplitudes at positions close to nodes and anti-nodes (related to no-load conditions) are given. Results according to the wattmeter method for measuring output acoustical power and electro-acoustic efficiency of high-power ultrasonic vibration systems (Langevin-type transducers and horns) have been simulated, and theoretical errors of this method calculated. This points out that there are some limits for the wattmeter method in high load conditions, but the method has practical values for measuring output acoustical power, especially for sonochemistry. Finally, based on the above analysis, some guidelines and suggestions for convenient on-line measurement are proposed. The vibration velocity of the radiation surface is discussed as an important quantity in analyzing acoustic input in high-intensity ultrasound applications. (C) 1997 Elsevier Science B.V.

引用

页码：533 / 541

页数：9

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