Estimation for Amplitude Decrease of Discretized Hydrophone Output Voltage by Imperfect Synchronous Averaging Using External Trigger
Estimation for Amplitude Decrease of Discretized Hydrophone Output Voltage by Imperfect Synchronous Averaging Using External Trigger
复制标题
使用外部触发的不完美同步平均估计离散水听器输出电压的幅度减小
DOI：
10.1143/jjap.50.07hc16
复制
发表时间：
2011
影响因子：
1.5
通讯作者：
T. Kikuchi
中科院分区：
文献类型：
--
作者：
M. Yoshioka;T. Kikuchi
本文描述了在超声场参数标定中，利用外部触发器不完全同步平均导致的离散水听器输出电压幅值下降的理论估计。将触发器的时间差作为随机变量，在采样周期范围内均匀分布，由统计期望值推导出估计公式。将该公式与实测的20 MHz超声水听器输出电压幅值进行比较，证实了该公式可以估计出振幅的减小，并可用于校正，从而获得准确的超声场测量结果。
An estimation using a theoretical formula for the amplitude decrease of discretized hydrophone output voltage due to imperfect synchronous averaging using an external trigger in our ultrasonic field parameter calibration is described. The estimation formula is derived from a statistically expected value considering the temporal difference of the trigger as a random variable with a uniform distribution in the range of the sampling period. As a result of comparing the formula and the measured hydrophone output voltage amplitude for ultrasound up to 20 MHz, it is confirmed that the formula can estimate the amplitude decrease and be used for correction to obtain accurate ultrasonic field measurement.