超声波.功率测量.辐射强度平衡和性能要求

[中文适用范围]： 这个国际标准？规定了一种基于辐射力平衡确定超声换能器发射的总声功率的方法； ？建立了使用辐射力天平的一般原则，其中障碍物（目标）拦截待测量的声场； ？确定了与空化和温升相关的辐射力方法的局限性； ？建立与发散和聚焦光束有关的辐射力方法的定量限制； ？提供有关总体测量不确定性评估的信息。本国际标准适用于： ?基于使用辐射力天平在 0.5 MHz 至 25 MHz 频率范围内测量高达 1 W 的超声波功率； ？基于使用辐射力天平在 0.75 MHz 至 5 MHz 频率范围内测量高达 20 W 的超声波功率； ？测量换能器的总超声波功率，最好使用准直良好的波束； ？使用重力式或力反馈式的辐射力天平。注：本标准中引用的所有出版物的标题均列于参考书目中。 [外文原描述]： This International Standard - specifies a method of determining the total emitted acoustic power of ultrasonic transducers based on the use of a radiation force balance; - establishes general principles for the use of radiation force balances in which an obstacle (target) intercepts the sound field to be measured; -establishes limitations of the radiation force method related to cavitation and temperature rise; - establishes quantitative limitations of the radiation force method in relation to diverging and focused beams; - provides information on assessment of overall measurement uncertainties. This International Standard is applicable to: - the measurement of ultrasonic power up to 1 W based on the use of a radiation force balance in the frequency range from 0,5 MHz to 25 MHz; - the measurement of ultrasonic power up to 20 W based on the use of a radiation force balance in the frequency range 0,75 MHz to 5 MHz; - the measurement of total ultrasonic power of transducers, preferably with well-collimated beams; - the use of radiation force balances of the gravimetric type or force feedback type.