IEC TS 61949-2007
超声学.原位表征.有限振幅超声波束原位曝光估计
Ultrasonics - Field characterization - In-situ exposure estimation in finite-amplitude ultrasonic beams
IEC TS 61949-2007 发布历史
This Technical Specification establishes: • the general concept of the limits of applicability of acoustic measurements in water resulting from finite-amplitude acoustic effects; • a method to ensure that measurements are made under quasi-linear conditions in order to minimise finite-amplitude effects, which may be applied under the following conditions: − to acoustic fields in the frequency range 0,5 MHz to 15 MHz; − to acoustic fields generated by plane sources and focusing sources of amplitude gain up to 12; − at all depths for which the maximum acoustic pressure in the plane perpendicular to the acoustic axis lies on the axis; − to both circular and rectangular source geometries; − to both continuous-wave and pulsed fields; • the definition of an acoustic quantity appropriate for establishing quasi-linear conditions; • a threshold value for the acoustic quantity as an upper limit for quasi-linear conditions; • a method for the estimation of attenuated acoustic quantities under conditions of nonlinear propagation in water.
IEC TS 61949-2007由国际电工委员会 IX-IEC 发布于 2007-11。
IEC TS 61949-2007 在中国标准分类中归属于: A42 物理学与力学，在国际标准分类中归属于: 11.040.55 诊断设备,17.140.50 电声学。
IEC TS 61949-2007的历代版本如下：
- 2007年11月 IEC TS 61949-2007 超声学.原位表征.有限振幅超声波束原位曝光估计
- 标准号
- IEC TS 61949-2007
- 发布日期
- 2007年11月
- 实施日期
- 废止日期
- 无
- 中国标准分类号
- A42
- 国际标准分类号
- 11.040.55;17.140.50
- 发布单位
- 国际电工委员会
- 被代替标准
- IEC 87/349/CDV-2006
- 适用范围
- This Technical Specification establishes: • the general concept of the limits of applicability of acoustic measurements in water resulting from finite-amplitude acoustic effects; • a method to ensure that measurements are made under quasi-linear conditions in order to minimise finite-amplitude effects, which may be applied under the following conditions: − to acoustic fields in the frequency range 0,5 MHz to 15 MHz; − to acoustic fields generated by plane sources and focusing sources of amplitude gain up to 12; − at all depths for which the maximum acoustic pressure in the plane perpendicular to the acoustic axis lies on the axis; − to both circular and rectangular source geometries; − to both continuous-wave and pulsed fields; • the definition of an acoustic quantity appropriate for establishing quasi-linear conditions; • a threshold value for the acoustic quantity as an upper limit for quasi-linear conditions; • a method for the estimation of attenuated acoustic quantities under conditions of nonlinear propagation in water.