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研制一种将机械天平、辐射压力法和智能控制结合在一起的大功率超声功率计,该功率计可以安装不同种类的反射靶面或吸收靶面对多种超声换能器进行功率测量;用砝码对该功率计进行校准和误差分析,结果显示该功率计具有稳定性好、精度高、测量范围大的特点。用锥面反射靶和吸收靶对高强度聚焦超声肿瘤治疗头的输出功率进行测量,实验结果表明:一方面该功率计可以满足大功率、高精度测量要求,另一方面被测量的临床治疗用高强度聚焦超声肿瘤治疗头的驱动电压在600-2200 V之间,其功率输出稳定、可靠,在此范围之外功率输出误差变大,超过5％。
Development of a mechanical balance, radiation pressure method and intelligent control of high-power ultrasonic power meter, the power meter can be installed in different types of reflective target surface or absorption target for a variety of ultrasonic transducers for power measurement; The weight of the power meter calibration and error analysis, the results show that the power meter has a good stability, high precision, large measuring range characteristics. The output power of the treatment head of high-intensity focused ultrasound tumor was measured by using the cone reflecting target and the absorbing target. The experimental results show that on the one hand the power meter can meet the requirements of high-power and high-precision measurement, on the other hand, High-intensity focused ultrasound tumor treatment head drive voltage between 600-2200 V, the power output is stable and reliable, beyond this range, the power output error becomes larger, more than 5%.