说明：  称重传感器通过感知压力变化输出压电信号，通过电压放大、低通滤波的调理电路将压电模拟信号放大并去噪送给采集模块，由单片机控制数据的采集与显示。
(The weighing sensor piezoelectric signal by changing the output pressure sensing amplifier, conditioning circuit, low-pass filter through the voltage of piezoelectric signal amplification and denoising for analog acquisition module, the data acquisition and display control.)