Application Research of Frequency-Modulated Continuous-Wave Displacement Sensor Based on Zero-Crossing Phase Detecting Algorithm

IF 1.8 4区物理与天体物理 Q3 OPTICS

International Journal of Optics Pub Date : 2021-03-22 DOI:10.1155/2021/6669539

Bin Sun, Junfang Song, G. Zheng, Xiongxing Zhang

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Abstract

Frequency-modulated continuous-wave (FMCW) interference, as a new technology of laser interferometry, has the advantages of length traceability, large range, high accuracy, simple structure, and optical fiber transmission. Based on the formula of FMCW laser interference displacement, a zero-crossing phase detection algorithm is proposed, which can accurately calculate the initial phase of a cosine signal in a modulation period, and it is successfully applied to the contact laser interference displacement sensor. The experimental results show that the FMCW technology based on the zero-crossing phase detection algorithm can achieve the technical specifications of the contact displacement sensor with a measurement range greater than 15 mm and the standard deviation is less than 0.01 μm. The conversion of noncontact measurement to contact measurement can realize the direct measurement of workpieces with complex surface conditions on the production line, breaking through the limitation of optical measurement and expanding the application of optical fiber interferometry.

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基于过零相位检测算法的调频连续波位移传感器应用研究

调频连续波干涉作为一种新型的激光干涉测量技术，具有长度可追溯、范围大、精度高、结构简单、光纤传输等优点。基于FMCW激光干涉位移公式，提出了一种能准确计算余弦信号在调制周期内初始相位的过零相位检测算法，并成功应用于接触式激光干涉位移传感器。实验结果表明，基于过零相位检测算法的FMCW技术可以实现接触式位移传感器的技术指标，测量范围大于15 mm，标准偏差小于0.01 μm。将非接触式测量转换为接触式测量，可以实现生产线上复杂表面条件工件的直接测量，突破了光学测量的局限，扩大了光纤干涉测量的应用范围。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Optics Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

3.40

自引率

5.90%

发文量

审稿时长

13 weeks

期刊介绍： International Journal of Optics publishes papers on the nature of light, its properties and behaviours, and its interaction with matter. The journal considers both fundamental and highly applied studies, especially those that promise technological solutions for the next generation of systems and devices. As well as original research, International Journal of Optics also publishes focused review articles that examine the state of the art, identify emerging trends, and suggest future directions for developing fields.