Time Domain Subdivision Method for Optical Grating Signal Based on Time Series Analysis
| Autor: | Wang Baozhu, Li Wenjuan, Peng Kai, Wang Qiang, Li Meili |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: | |
| Zdroj: | Nanotechnology and Precision Engineering, Vol 1, Iss 1, Pp 48-53 (2018) |
| Druh dokumentu: | article |
| ISSN: | 2589-5540 20170041 |
| DOI: | 10.13494/j.npe.20170041 |
| Popis: | Aiming at the restriction of the Moire signal quality on the subdivision multiple and accuracy, a time domain subdivision method for optical grating signals based on time series analysis is proposed. The relationship between the grating pitch and the sampling period is utilized to transform the equal space intervals into time series. A time domain prediction model is established based on the autoregressive model of time series analysis to predict the sampling time, and the parameters of the model are calculated using the maximum likelihood estimate method. Experimental results indicate that the subdivision errors both achieve ± 2.4'' when the subdivision multiples are 400 and 800, respectively. This subdivision method reduces the reliance on grating signal quality, proving certain application value. 摘要: 针对光栅细分倍数和精度受到莫尔条纹信号质量限制的问题,提出一种基于时间序列分析的光栅信号时 域细分方法.首先利用等空间间隔的栅距与采样时间周期的对应关系,将空间栅ìié 转换为时间序列.然后利用时间 序列分析中的自回归模型进行建模预测,并采用最大似然估计法计算模型参数.最后在预测时间内发送出代表位 移的细分脉冲.实验表明,细分倍数为400 或800 时的角位移细分误差均为:t 2.4'' ,且光栅运动加速度及其变化率 越小,细分误差越小.此细分方法一定程度上降低了对光栅信号质量的依赖,具有一定的应用价值.中图分类号: TH7 文献标志码:A 文章编号: 1672-6030(2018)01-0048-06 Keywords: optical grating, space-time conversion, time domain subdivision, time series, 关键词: 光栅, 时空转换, 时域细分, 时间序列 |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
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