超声波 功率测量 高强度治疗性超声波(HITU)传感器和系统

[中文适用范围]： 本国际标准确立了与使用辐射力天平的 HITU 场相关的一般原则，其中障碍物（目标）拦截待测量的声场；规定了基于测量充满流体的目标的热膨胀来确定超声换能器的总发射声功率的量热方法；规定了与超声波换能器电功率特性声明相关的要求；提供与测量期间避免声空化有关的指导；提供与不同结构和几何形状的 HITU 换能器测量相关的指南，包括准直@发散和会聚换能器@以及多元件换能器；为选择最合适的测量方法提供指导；提供有关总体测量不确定性评估的信息。本国际标准适用于测量HITU设备在0@5 MHz至5 MHz频率范围内产生的高达500 W的超声波功率。 HITU 设备可以生成汇聚@准直或发散场。对于低于 500 kHz@ 的频率，不存在验证，用户应评估工作频率下功率测量和测量系统的不确定性。本国际标准不适用于： 用于理疗@用于碎石术以缓解一般疼痛的超声设备。 [外文原描述]： IEC 62555:2013 establishes general principles relevant to HITU fields for the use of radiation force balances in which an obstacle (target) intercepts the sound field to be measured; specifies a calorimetric method of determining the total emitted acoustic power of ultrasonic transducers based on the measurement of thermal expansion of a fluid-filled target; specifies requirements related to the statement of electrical power characteristics of ultrasonic transducers; provides guidance related to the avoidance of acoustic cavitation during measurement; provides guidance related to the measurement of HITU transducers of different construction and geometry, including collimated, diverging and convergent transducers, and multi-element transducers; provides guidance on the choice of the most appropriate measurement method; and provides information on assessment of overall measurement uncertainties. This International Standard is applicable to the measurement of ultrasonic power generated by HITU equipment up to 500 W in the frequency range from 0,5 MHz to 5 MHz. HITU equipment may generate convergent, collimated or divergent fields. For frequencies less than 500 kHz, no validations exist and the user should assess the uncertainties of the power measurement and measurement system at the frequencies of operation. This International Standard does not apply to ultrasound equipment used for physiotherapy, for lithotripsy for general pain relief.