DP flow sensor using optical fibre Bragg grating

• Published in: Sensors and actuators. A, Physical Vol. 92; no. 1; pp. 102 - 108
• Main Authors: Lim, J., Yang, Q.P., Jones, B.E., Jackson, P.R.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 01-08-2001; Elsevier Science
• Subjects: Bragg grating; Differential pressure; Exact sciences and technology; Fiber-optic instruments; Flow sensor; Fluid dynamics; Fundamental areas of phenomenology (including applications); General equipment and techniques; Instrumentation for fluid dynamics; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Optical instruments, equipment and techniques; Physics; Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing; Flow sensor; Bragg grating; Differential pressure; Performance evaluation; Optical fibers; Manufacturing processes; Feedback system; Flowmeter(sensor); Fluid flow; Flow measurement; Experimental study; Grating in fiber
• ISSN: 0924-4247; 1873-3069
• DOI: 10.1016/S0924-4247(01)00546-5

An optical-based differential pressure (DP) flow sensor has been developed for an optically-powered hydraulic valve monitoring and feedback control system. The DP sensor employs two optical fibre single-mode Bragg grating elements, which are mounted on either side of the DP sensing diaphragm. The fluid flow-rate signal is obtained in the form of differential optical wavelength shift, and temperature compensation is provided. The sensor has been tested at fluid flow-rates from 0 to 800
cm
3/s with temperature varying from 25 to 75°C. The optically-powered hydraulic valve using the DP flow sensor as a monitoring system has been tested with hydraulic oil with a flow-rate up to 6
cm
3/s at a pressure of 700
kPa.