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研究聚焦超声场的辐射力计算。应用几何声学方法,推导了聚焦超声作用于测试靶上的辐射力通用公式,讨论了全反射靶和全吸收靶上的辐射力。最后给出了应用辐射力法测量高强度聚焦超声装置的声功率的实例,其结果与良热法测得的声功率接近,偏差不大于3%。
Research focused on the calculation of the radiation field of the ultrasound field. The geometrical acoustics method is used to derive the general formula of the radiation force on the target by focused ultrasound, and the radiation force on the total reflection target and the full absorption target is discussed. Finally, an example of using the radiation force method to measure the sound power of a high intensity focused ultrasound device is given. The result is close to the sound power measured by the good heat method, and the deviation is no more than 3%.