CAJ | 학술논문

消除工频干扰方法可以有效地消除传感器在接收信号的过程中产生的不必要干扰因素。文中通过分析冲击波超压测试中工频干扰产生的原因，提出自适应信号噪声抵消方法与陷滤波方法，利用自适应信号噪声抵消法与陷滤波法对工频干扰进行消除，并运用MATLAB来进行仿真。实验结果表明：在时域上，自适应噪声抵消法的降噪幅度比陷滤波法有一定提高；在频域上，用自适应噪声抵消法处理后的冲击波的有效频率优于陷滤波法。
소제공빈간우방법가이유효지소제전감기재접수신호적과정중산생적불필요간우인소。문중통과분석충격파초압측시중공빈간우산생적원인，제출자괄응신호조성저소방법여함려파방법，이용자괄응신호조성저소법여함려파법대공빈간우진행소제，병운용MATLAB래진행방진。실험결과표명：재시역상，자괄응조성저소법적강조폭도비함려파법유일정제고；재빈역상，용자괄응조성저소법처리후적충격파적유효빈솔우우함려파법。
Elimination of power frequency interference can effectively eliminate unnecessary disturbances generated by the sensor in the process of receiving signals .After analyzing causes of power frequency interference in shock wave overpressure test ,a method ,using adaptive signal to erase or filter noise ,is proposed .Then MATLAB is used to simulate the experiment .Results show that in the time domain ,the noise amplitude with adaptive noise cancellation method is higher than a certain filtering ;In the frequency domain ,the effective frequency of shock wave treated by adaptive noise cancellation is superior to trap filtering .