波形记录仪触发延迟的测量不确定度评定  

The Uncertainty of Trigger Delay of Waveform Recorders

作　　者：梁志国[1,2] 孟晓风[1] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100191 [2]北京长城计量测试技术研究所计量与校准技术重点实验室,北京100095

出　　处：《计量学报》2011年第4期361-367,共7页Acta Metrologica Sinica

摘　　要：提出了使用正弦波激励评价波形记录仪触发延迟的新方法，通过一个波形在有触发延迟和无触发延迟时，采集序列间的相位差对应的时间差来最终判定触发延迟结果。讨论了影响评价结果不确定度的几个主要误差来源，包括信号源误差、采集序列的谐波失真、噪声与非谐波失真、抖动．软件拟合运算误差等，同时给出了不确定度评定结果。以一组实验结果验证了所述方法的有效性和切实可行性。The evaluation method for trigger delay of waveform recorders are presented. By using a sinusoidal stimulating, one can take the sampling waves of both trigger delay and non-trigger delay, and then obtain the trigger delay from the phase difference. Some error sources are discussed, including the errors of signal generators, the harmonic distortion,the noise and the spurious distortion, the jitter of the sampling series, the triggering jitters, and the curve-fitting errors of the software, etc. Meanwhile, the uncertainty analysis are introduced in detailed, the measurement uncertainty of trigger delay are taken out. By using experiment, the feasibility and validity are proved.

关 键 词：计量学 触发延迟 不确定度 校准 评价 数字存储示波器 

分 类 号：TB97[一般工业技术—计量学]