摘要
本文就超声功率标准中的反射靶和换能器的安装误差对测量精度的影响进行数学分析,推导出在存在安装误差的情况下计算超声功率的数学解析式及其二阶近似式,并用计算机算出一些常用条件下反射声压的精确值,从而可以修正由安装误差引起的超声功率测量误差。
The installation error of the transducer and reflecting target in the standard ultrasonic power apparatus will result in a measurement uncertainty.In this paper,the authors derive the mathematic expressions for computing the accurate value of the ultrasonic power concerning installation errors.For the convenience of application,the second-order approximate expressions are also derived and a series of values of reflecting ultrasonic pressure in common conditions are calculated with computer.Making use of these results,the measuring error can be corrected.
出处
《计量学报》
CSCD
1992年第3期208-213,220,共7页
Acta Metrologica Sinica
