Studies on the long-term stability of fiber optic pressure sensor

Bing Qi; Wei Peng; Shunping Ren; Junxiu Lin

doi:10.1117/12.252190

24 September 1996 Studies on the long-term stability of fiber optic pressure sensor

Bing Qi, Wei Peng, Shunping Ren, Junxiu Lin

Proceedings Volume 2895, Fiber Optic Sensors V; (1996) https://doi.org/10.1117/12.252190
Event: Photonics China '96, 1996, Beijing, China

Abstract

In this paper, a fiber optic pressure sensor system based on the photoelastic effect is described. By application of a new balanced bridge referencing technique, the sensor is satisfactorily loss-compensated. In order to improve the long-term stability of this system in practical use, a more stable and compact sensor head is realized. By theoretical analysis and experiment, the system error which is due to drifts in the wavelength of light source has been eliminated using software compensation. In order to compensate the system's time-drifting and temperature-drifting, pattern identification technique and adaptive filter are used. This system has been put into practical operation for oil storage and level measurement in tanks, and the long-term stability of the sensor is proved to be better than 0.2%. This work not only solves a practical problem of fiber optic pressure sensor, but also has a general significance to solve the problem of long-term drifts in intensity-modulated fiber optic sensor.

Citation Download Citation

Bing Qi, Wei Peng, Shunping Ren, and Junxiu Lin "Studies on the long-term stability of fiber optic pressure sensor", Proc. SPIE 2895, Fiber Optic Sensors V, (24 September 1996); https://doi.org/10.1117/12.252190

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