LIU Hailong, SUN Haoran, ZHAO Yiming, et al. Analysis of the impact of electromagnetic interference on the output of noise sensors[J]. 2026, 45(4): 67-71.
LIU Hailong, SUN Haoran, ZHAO Yiming, et al. Analysis of the impact of electromagnetic interference on the output of noise sensors[J]. 2026, 45(4): 67-71.DOI:
噪声传感器在电磁干扰下输出影响性分析研究
摘要
由于噪声信号为微压信号
外界电磁干扰易叠加在噪声信号中
导致噪声传感器在工作时产生异常输出。为解决该问题
对噪声传感器在电磁干扰环境下的异常输出进行分析研究
得出噪声传感器异常输出的敏感频率区间为80~200MHz
并提出一种共模电感与电容组成的电感-电容(LC)滤波电路设计
对敏感频率区间的电磁干扰予以消除
并通过试验验证了滤波电路设计的有效性
从而提高噪声传感器的测量精度。
Abstract
As noise signals are micro-pressure signals
external electromagnetic interference is easily superimposed on the noise signals
leading to abnormal output of the noise sensor during operation.To address this issue
the abnormal output of the noise sensor in electromagnetic interference environments is analyzed and studied
and the sensitive frequency range for abnormal output is determined to be 80~200MHz.An inductor-capacitor(LC)filter circuit composed of a common-mode inductor and a capacitor is proposed to eliminate electromagnetic interference in the sensitive frequency range.The effectiveness of the filter circuit design is verified through experiments
which improves the measurement accuracy of the noise sensor.