We present a simple and inexpensive fiberoptic displacement sensor based on the inverse-square attenuation of light reflected from a diffuse surface. A ratio scheme provides immunity from variations in surface color and finish. A design method for determining sensor parameters is provided, and experimental results for a prototype sensor are discussed.
Topics
Fiber optics
REFERENCES
1.
D.
Campbell
, “Ultrasonic Noncontact Dimensional Measurement
”, Sensors
3
(7
) 37
–43
(1986
).2.
A. K.
Bejczy
, “Smart Sensors for Smart Hands”, Paper 78-1714, AIAAINASA Conference on “Smart” Sensors
, Hampton, VA
, Nov. 14-16, 1978
.3.
D. E. N.
Davies
, J.
Chaimowicz
, G.
Economou
, and J.
Foley
, “Displacement Sensor Using a Compensated Fiber Link
”, in R.
Kersten
and R.
Kist
, eds., Second Intl. Conf. on Optical Fiber Sensors
(1984
), pp. 387
–390
.4.
C. M.
Davis
, “Fiber Optic Sensors: an Overview”, in Fiber Optic and Laser Sensors II
(Proc. of SPIE Vol. 478, Bellingham, WA
, 1984
), pp. 12
–18
.5.
G.
Hull-Allen
, “Reflectivity Compensation and Linearization of Fiber Optic Probe Response” in Optical Systems Engineering N
(Proc. of SPIE vol. 518, Bellingham, WA
, 1984
), pp. 81
–85
.6.
L.
Hoogenboom
, G.
Hull-Allen
, and S.
Wang
, “Theoretical and Experimental Analysis of a Fiber Optic Proximity Probe”. in Fiber Optic and Laser Sensors II
(Proc. of SPIE vol. 478, Bellingham, WA
, 1984
), pp. 46
–57
.7.
N. E.
Lewis
, M. B.
Miller
, W. H.
Lewis
, “Fiber Optic Sensors Utilizing Surface Reflections”, in Fiber Optic and Laser Sensors II
(Proc of SPIE vol. 478, Bellingham, WA
, 1984
), pp. 39
–45
.8.
J. T.
Luxon
and D. E.
Parker
, Industrial Lasers and Their Applications
(Prentice-Hall
, Englewood Cliffs, NJ
, 1985
), pp. 154
–157
.9.
M.
Fuhrman
and T.
Kanade
, “Design of an Optical Proximity Sensor Using Multiple Cones of Light for Measuring Surface Shape
”, Opi Eng.
23
(5
) 546
–553
(1984
).10.
Anon.
“Optical Systems Featured
”, Sensor Review
5
(3
) 172
–174
(1985
).11.
Atul
Jain
, “System for Relative Motion Detection Between Wave Transmitter-Receiver and Irregular Reflecting Surface
”, US Patent no. 4,210,399, Jan. 10, 1977.12.
A.
Hayashi
and Y.
Kitagawa
, “High-Resolution Rotation-Angle Measurement of a Cylinder Using Speckle Displacement Detection
”, Appl. Opt.
22
(22
) 3520
–3525
(1983
).13.
N.
Takai
and T.
Asakura
, “Displacement Measurement of Speckles Using a 2-D Level Crossing Technique
”, Appl. Opt.
22
(22
) 3514
–3519
(1983
).14.
Anon.
, “Distance Sensing Uses Automatic Focusing Technology
”, Sensor Review
4
(4
) 172
–173
(1984
).15.
G.
Kychakoff
, P. H.
Paul
, and R. K.
Hanson
, “Fiber-Optic Sensor System for Industrial Monitoring Applications”, in Technical Digest of the Conference on Lasers and Electrooptics
(Optical Society of America
, Washington DC
, 1984
), pp. 132
–133
.16.
17.
NSG America
, SELFOC Handbook
(NSG America, Inc.
, Clark, New Jersey
, 1981
).18.
J. W.
Goodman
, “Statistical Properties of Laser Speckle”, in J.C.
Dainty
, ed., Laser Speckle and Related Phenomena
(Springer-Verlag
, Berlin
, 1978
).19.
E. G.
Rawson
, J. W.
Goodman
, and R. E.
Norton
, Opt. Lett.
vol. 5
, p. 357
(1980
).
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1987
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