... 增益边缘 gain margin 增益波动 gain fluctuation 增益不均匀性 gain inequality ...
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Using the time-gain compensation technique to compensate for ultrasonic waves weaking when transmitting in the air, and reduce the fluctuation of echo signal.
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。
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