Determination of saltwater concentration based on optical and electrical dual-differential methods

Yong Zhao; Min Rong; Yanbiao Liao

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Determination of saltwater concentration based on optical and electrical dual-differential methods

机译：Determination of saltwater concentration based on optical and electrical dual-differential methods

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摘要

Salinity measurement with a reflex optical and electrical dual-differential sensor is experimentally developed. The sensor exploits the beam deviation due to optical refraction at the receiving endface of the measurement cell, which is caused by changes in the refractive index with different concentrations of saltwater. With the help of a right-angle reflecting prism and in the presence of a referenced distilled water cell with an inclined optical window, optical differential measurement of incident beam deviations is implemented, and the deviation caused by changes in salinity are detected by a position-sensitive detector (PSD) with an electrical differential signal processing technique. Experimental setup and measurement principles are discussed. Salinity measurements based on this method avoid the influences by light power fluctuation of the incident light and temperature drift. Experimental results indicate that the estimated salinity measurement resolution can reach 0.012.

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来源
《Optical Engineering》 |2004年第3期|732-736|共5页
作者
Yong Zhao; Min Rong; Yanbiao Liao;
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作者单位

Tsinghua University Department of Automation Beijing 100084, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类光学仪器;
关键词
salinity measurement; differential method; optical inspection; position-sensitive detector; refractive index; distilled water;

Determination of saltwater concentration based on optical and electrical dual-differential methods

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