High-accuracy fiber optic level sensor

Liang Ren; Qingxu Yu

doi:10.1117/12.481995

9 September 2002 High-accuracy fiber optic level sensor

Liang Ren, Qingxu Yu

Proceedings Volume 4920, Advanced Sensor Systems and Applications; (2002) https://doi.org/10.1117/12.481995
Event: Photonics Asia, 2002, Shanghai, China

Abstract

This paper describes a novel fiber-optic level sensor designed to measure the level of benzene, diesel oil and other chemical liquid discretely or continuously. It is an intensity-modulated on-off switching sensor whose operating principle is based on the frustrated-total-internal-reflection effect caused by the refraction index change of the surrounding medium. The sensor head is made from standard multi-mode communication silica fiber with a taper tip. Different tip shapes and fabrication methods were studied and the maximum signal contrast of 15 dB of the sensor tip has been obtained. The experiment results demonstrated that the resolution of the system of 10?m and the level measurement accuracy of ±0.5 mm have been achieved in a continuous measurement range of 2m.

Citation Download Citation

Liang Ren and Qingxu Yu "High-accuracy fiber optic level sensor", Proc. SPIE 4920, Advanced Sensor Systems and Applications, (9 September 2002); https://doi.org/10.1117/12.481995

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available