摘要
针对标准周期计数法在对数据采集器的采样速率进行评价时无法有效抑制干扰和噪声这一问题,提出了一种采样速率评价方法。该方法利用标准信号源提供标准交流信号,采用自相关滤波法对采样数据进行处理,得到数据采集器的采样速率,进而得到通道间的延迟时间。仿真结果表明,该方法简单、抗干扰能力强、评价数据一致性好。
Aiming at the problem that in evaluating the sampling rate of data acquisition, the standard cyclic counting method is unable to effectively suppress interference and noise, thus a new evaluation method is proposed. In this method, the standard AC signal is provided by standard signal source ; the sample data are processed by autocorrelation filtering, for obtaining sampling rate of the data acquisition device, and the delay time between channels. The simulation indicates that this simple method features high anti-interference capability and good consistency in evaluation data.
出处
《自动化仪表》
CAS
北大核心
2013年第3期71-73,共3页
Process Automation Instrumentation
关键词
数据采集
采样速率
延迟时间
周期信号
自相关方法
Data acquisition
Sampling rate
Delay time
Cycle signal
Autocorrelation method
