Torsion measurement using fiber Bragg grating sensors

In this paper, the authors study the potential of using fiber Bragg grating (FBG) strain sensors to measure the torsion deformation theoretically and experimentally. FBG sensors are bonded on the surface of a shaft. When the shaft is under torsion, there is strain induced in the FBG sensor and the Bragg wavelength will shift accordingly. According to the wavelength shift and photoelastic properties of the FBG sensor bonded to the shaft, the torsion deformation of the shaft can be obtained. To minimize the measurement error, the optimal direction of the FBG sensor is obtained. The influences of the orientation deviation of the FBG sensor are discussed. The feasibility of this method is demonstrated by experiment, and the test results agree well with the theoretical analysis.

[1]  Martin A. Putnam,et al.  Distributed strain sensing with fibre Bragg grating arrays embedded in CRTM composites , 1994 .

[2]  K. Hill,et al.  Photosensitivity in optical fiber waveguides: Application to reflection filter fabrication , 1978 .

[3]  H. I. Epstein,et al.  Handbook of Mechanics, Materials, and Structures , 1986 .

[4]  Stéphane Rougeault,et al.  Mine operating accurate stability control with optical fiber sensing and Bragg grating technology: the European BRITE/EURAM STABILOS project , 1995 .

[5]  G. Meltz,et al.  Formation of Bragg gratings in optical fibers by a transverse holographic method. , 1989, Optics letters.

[6]  Lin Zhang,et al.  In-fiber Bragg-grating temperature sensor system for medical applications , 1997 .

[7]  Martin A. Putnam,et al.  Interrogation of 60 fibre Bragg grating sensors with microstrain resolution capability , 1996 .

[8]  M. A. Putnam,et al.  Stepped-wavelength optical-fiber Bragg grating arrays fabricated in line on a draw tower. , 1994, Optics letters.

[9]  Alan D. Kersey,et al.  Interrogation and multiplexing techniques for fiber Bragg grating strain sensors , 1993, Other Conferences.

[10]  W. W. Morey,et al.  Fiber optic Bragg grating strain sensor in large-scale concrete structures , 1993, Other Conferences.

[11]  Martin A. Putnam,et al.  Determination of cantilever plate shapes using wavelength division multiplexed fiber Bragg grating sensors and a least-squares strain-fitting algorithm , 1998 .

[12]  J. Bokor,et al.  Bragg gratings fabricated in monomode photosensitive optical fiber by UV exposure through a phase mask , 1993 .

[13]  Raymond M. Measures,et al.  Distributed strain sensing using long intracore fiber Bragg gratings , 1996, Optics & Photonics.

[14]  X. Tao,et al.  RETRACTED: Internal strain measurement by fiber Bragg grating sensors in textile composites , 2000 .

[15]  Hwa-Yaw Tam,et al.  Effects of pure bending on the sensing characteristics of fiber Bragg gratings , 2000, Other Conferences.

[16]  J. Dakin,et al.  Distributed grating sensors using low-coherence reflectometry , 1997 .

[17]  Martin A. Putnam,et al.  High-sensor-count Bragg grating instrumentation system for large-scale structural monitoring applications , 1996, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[18]  William W. Morey,et al.  IN-FIBER BRAGG-GRATING SENSORS , 1988 .

[19]  Laurence Reekie,et al.  High reflectivity ad narrow bandwidth fibre gratings written by single excimer pulse , 1993 .

[20]  N. G. Walker,et al.  Routing and configuration of static path optical transport networks , 1996 .

[21]  M. Leblanc,et al.  Continuous arbitrary strain profile measurements with fiber Bragg gratings , 1998 .