Laser-fiber sensor for measuring relative shift

Junfu Ma; Yanbin Zhu

doi:10.1117/12.179627

13 July 1994 Laser-fiber sensor for measuring relative shift

Junfu Ma, Yanbin Zhu

Proceedings Volume 2220, Sensing, Imaging, and Vision for Control and Guidance of Aerospace Vehicles; (1994) https://doi.org/10.1117/12.179627
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

A new type of laser-fiber sensor for measuring and monitoring a big size body (for example the rocket body) surface's relative shift, which is produced in a strong vibration system, has been studied. The laser-fiber sensor is a combination of laser, fiber, computer, etc. and has features of simple, quick, and high accuracy. The light of a semiconductor laser with a wavelength of (lambda) equals 780 nm passes through a 12 m long multi-mode fiber and an objective lens, then irradiates on the surface measured. Another objective lens collects the reflected light from the surface measured and images it on a 2048 charge coupled device (CCD), then a 286 computer processes the signal from the CCD. The sampling frequency of measuring data of this laser-fiber sensor is 800 Hz and its measuring accuracy is better than +/- 0.05 mm. The measuring range of relative shift is about +/- 15 mm. It has the ability to measure and monitor the related shift of moving objects in a strong vibration system.

Citation Download Citation

Junfu Ma and Yanbin Zhu "Laser-fiber sensor for measuring relative shift", Proc. SPIE 2220, Sensing, Imaging, and Vision for Control and Guidance of Aerospace Vehicles, (13 July 1994); https://doi.org/10.1117/12.179627

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