Liquid level sensing based on laser differential confocal detectors

Haibo Gao; Chunshi Fan; Li Zhang; Yao Hu

doi:10.1117/12.2074894

9 January 2015 Liquid level sensing based on laser differential confocal detectors

Haibo Gao, Chunshi Fan, Li Zhang, Yao Hu

Proceedings Volume 9444, International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2014); 94440A (2015) https://doi.org/10.1117/12.2074894
Event: International Seminar on Photonics, Optics, and Applications 2014, 2014, Sanur, Bali, Indonesia

Abstract

Liquid level measurement plays an important part in industry and daily life. Applications include oil tanks, gasoline stations and public water supplies. Traditional electronic sensors cannot satisfy the demands in harsh environments. Recently, optical sensors have been particularly attractive in these applications. We propose a sensing method based on laser differential confocal detectors for discrete or continuous liquid level sensing. No target or supplementary device need to be immersed into the liquid. The sensitivity of the liquid level is about 0.01 mm with current systematic parameters. Measurement experiment of simulated liquid surface with a reflective mirror is carried out to verify the method.

Citation Download Citation

Haibo Gao, Chunshi Fan, Li Zhang, and Yao Hu "Liquid level sensing based on laser differential confocal detectors", Proc. SPIE 9444, International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2014), 94440A (9 January 2015); https://doi.org/10.1117/12.2074894

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