Using the time-gaincompensation and peak time detecting technique, the arrival time of ultrasonic echo can be correctly detected.
采用了时间增益补偿技术和峰值时间检测技术，可正确检测超声波回波的到达时间。
2
The method adjusts time constant and gain of compensation-circuits with determining change of magnetic resonance signal of phantom.
本方法通过观察水模样品的磁共振信号的变化来调正补偿电路的时间常数和增益。
3
Using the time-gaincompensation technique to compensate for ultrasonic waves weaking when transmitting in the air, and reduce the fluctuation of echo signal.