Abstract
This paper reports the principle of operation, the design aspects, experimentation and performance of a fibre optic target reflectivity sensor to examine the correlation between the detector output, variation in material type and the reflectivity properties of the materials tested. The device consists of a fibre optic transmitter, a fibre optic probe, target and a photodiode detector. The fibre optic probe consists of two well-polished PMMA (polymethyl methacrylate) fibres cemented together along some distance over the length. The principle of fibre optic lever displacement sensors is applied. Material effects are examined by preparing a variety of samples namely gold coated mirror, copper, brass, aluminium, steel and galvanized iron using the same polishing techniques. It is found that the response of the sensor changes with change of target surface. The results show that the fibre optic probe is capable of discriminating between materials. With the use of commercially available fibre, source and detector, the set-up proves to be simple, highly sensitive, low cost and versatile one, which can be adopted for on-line measurement or inspection of test components.
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References
Cook R.O. and Hamm C.W. (1979). Fibre optic lever displacement transducer. Appl. Opt. 18: 3230–3241
Cook R.O. and Hamm C.W. (1981). Shock measurement with non-contacting fibre optic levers. J. Sound Vib. 76: 443–456
Cockshott C.P. and Pacaud S.J. (1989). Compensation of an optical fibre reflective sensor. Sens. Actuators 17: 167–171
Giallorenzi T.G., Bucaro J.A., Sigel G.H., Cole J.H., Rashleigh S.C., Priest R.G. and Dandridge A. (1982). Optical fibre sensor technology. IEEE Trans. Microwave Theo. Tech 82: 472–511
He G. and Cuomo F.W. (1991). Displacement response, detection limit and dynamic range of fibre-optic lever sensors. IEEE J. Light Wave Technol. 9: 1618–1625
Libo Y. and Anping Q. (1991). Fire-optic diaphragm pressure sensor with automatic intensity compensation. Sens. Actuators A 28: 29–33
Nalwa S. (2004). Polymer Optical Fibres. American Scientific Publishers, California
Oiwa T. and Nishitani H. (2004). Three dimensional touch probe using three fibre optic displacement sensors. Meas. Sci. Technol. 15: 84–90
Shoham M., Fainman Y. and Lenz E. (1984). An optical sensor for real time positioning, tracking and teaching of industrial robots. IEEE Trans. Ind. Electron IE-31: 159–163
Spooncer R.C., Butler C. and Jones B.E. (1992). Optical fibre displacement sensors for process and manufacturing applications. Opt. Eng. 31: 1632–1637
Saito M. and Kitagawa K. (2001). Axial and radial fluorescence of dye-doped polymer fibre. J. Lightwave Technol. 19: 982–987
Utou F., Egryzagoridis J. and Sun B. (2006). Parameters affecting the performance of fibre optic displacement sensors. Smart Mater. Struct. 15: S154–S157
Wang D.X., Anderson W.L., Karim M.A. and Li Y. (1997). Self-referenced two fibre sensor systems for micro displacement measurement. Opt. Eng. 36: 2809–2813
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Binu, S., Mahadevan Pillai, V.P. & Chandrasekaran, N. Fibre optic target reflectivity sensor. Opt Quant Electron 39, 747–752 (2007). https://doi.org/10.1007/s11082-007-9143-z
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DOI: https://doi.org/10.1007/s11082-007-9143-z