Phase Unwrapping and Frequency Points Subdivision of the Frequency Sweeping Interferometry Based Absolute Ranging System.

Luming Song, Guang Shi, Hong Liu, Hongyi Lin, Fumin Zhang, Dong Sun

Abstract read

In one paragraph

Article in Sensors (Basel, Switzerland), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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5 · Who and what money

Authors and funding

6 authors.

Luming SongSchool of Optoelectronic and Communication Engineering, Xiamen University of Technology, Xiamen 361024, China.ORCID 0000-0001-9690-4538

Guang ShiSchool of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.ORCID 0000-0002-3211-8105

Hong LiuSchool of Optoelectronic and Communication Engineering, Xiamen University of Technology, Xiamen 361024, China.

Hongyi LinSchool of Optoelectronic and Communication Engineering, Xiamen University of Technology, Xiamen 361024, China.ORCID 0000-0003-4096-8916

Fumin ZhangState Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin 300072, China.

Dong SunSchool of Optoelectronic and Communication Engineering, Xiamen University of Technology, Xiamen 361024, China.ORCID 0000-0002-0795-673X

Funding

Natural Science Foundation of Fujian Province 2021I0025, 2021J011217Science Technology Innovation of Xiamen 3502Z20183062

6 · The paper itself

Abstract

Frequency sweeping interferometry (FSI) based absolute distance ranging has high precision and no ranging blind area. It can be used to realize large-scale and non-cooperative target measurement. However, the nonlinear frequency modulation of the laser seriously affects the ranging accuracy. In this manuscript, a measurement method assisted by Hilbert Transform (HT) and Chirp-z Transform (CZT) is proposed, which can realize the phase unwrapping of the beat signal, the length reduction in the delay fiber of auxiliary optical path, and the improvement of the frequency resolution. The narrow-band frequency suitable for HT is further studied. In the experiment, the ranging resolution is 70 μm and the standard deviation is 12.6 μm within a distance of 4005 mm.

Indexed as

absolute distance measurementCZTFSIHT

Identifiers

PMID35458889

DOI10.3390/s22082904

PMCPMC9028057

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.