CAJ | 학술논문

为解决炸药 NQR 信号去噪问题，针对 NQR 信号非线性与非平稳性特点，提出基于经验模态分解及小波变换联合的信号去噪方法。据实验测试的黑索金 NQR 信号对所提方法进行去噪性能分析。结果表明该方法在保留信号有用信息的前提下可有效去除噪声，从而提高信噪比、克服小波阈值去噪与直接 EMD 去噪缺陷，自适应性良好，为有效的炸药 NQR 信号去噪方法。
위해결작약 NQR 신호거조문제，침대 NQR 신호비선성여비평은성특점，제출기우경험모태분해급소파변환연합적신호거조방법。거실험측시적흑색금 NQR 신호대소제방법진행거조성능분석。결과표명해방법재보류신호유용신식적전제하가유효거제조성，종이제고신조비、극복소파역치거조여직접 EMD 거조결함，자괄응성량호，위유효적작약 NQR 신호거조방법。
Explosive nuclear quadrupole resonance (NQR ) signals have nonlinear and non-stationary characteristics.In order to solve the NQR signal de-noising problem,a de-noising method based on empirical mode decomposition (EMD)and wavelet transform was proposed.The original NQR signals of RDX detected by experiment were used to analyze the de-noising performance.The results indicate that the proposed method can eliminate the noise effectively and well preserve the effective information of original signals.Meanwhile,the method can overcome the shortcomings of wavelet threshold de-noising and direct EMD de-noising,and improve the signal-to-noise ratio.The method has excellent adaptability,and was proved to be an effective de-noising way for NQR signals.