【摘要】 超声功率传递标准是采用中国计量科学研究院研制的标准石英晶体换能器组成的一个标准超声源。换能器具有良好的长期稳定性,故标准超声功率能以测量射频电压的精确度来再现,在1～5MHz频率范围内,以5%的不确定度传递1～500mW的声功率。更多还原

【Abstract】 A set of standard quartz transducers with impedance matching units is developed at NIM to be used as an ultrasonic power transfer standard.With its excellent long-term stability,it can be used in the power range of 1 to 500 mW within 1-5 MHz with an overall uncertainty less than 5%.更多还原