在分析解调电路工作原理的基础上提出了调幅信号半波解调方法，对其解调原理作了数学推导，并进一步推广提出了广义检波滤波解调方法，讨论了该方法在齿轮故障诊断中的应用 Based on the analysis of the working principle of the demodulation circuit, a half-wave demodulation method of AM signal is proposed and its demodulation principle is mathematically deduced. Then a generalized demodulation and demodulation method is proposed. The method is applied to gear fault diagnosis In the application