针对数字式重力计量设备,提出了基于传导电磁干扰(Electromagnetic interference,EMI)噪声抑制的噪声分离网络优化结构和电感电容优化滤波器设计,以及基于辐射噪声抑制的传输线共模电流分析方法,并进行了详细阐述。实验结果表明,本文方法不仅可使设备满足GB9254的EMI检测标准,而且设计的优化滤波器可减小寄生参数影响和降低经济成本,同时辐射噪声抑制避免了借助电波暗室测量及电磁屏蔽等复杂辐射EMI噪声估计和抑制措施。 For digital gravimetric equipment, the design of noise separation network optimization based on EMI suppression and the design of inductor-capacitor optimization filter, as well as the transmission line common mode current analysis method based on radiated noise suppression are proposed. Elaborated The experimental results show that this method not only can make the equipment meet the EMI detection standard of GB9254, but also the optimized filter can reduce the influence of parasitic parameters and reduce the economic cost. At the same time, the radiated noise suppression avoids using complex anechoic chamber measurements and electromagnetic radiation shielding EMI noise estimation and suppression measures.