发明名称 |
Embedded fiber optic beam displacement sensor |
摘要 |
A method and apparatus for the two dimensional measurement of displacements of sample materials using a photodetector grid array and optical fiber embedded in the test specimen. The system consists of a light source which is passed into one end of an optical fiber which has been embedded a beam specimen, so that when the beam is placed in motion, the light traverses through the fiber and emerges from the opposite end where its projected image traces a pattern simulating that of the beam. In a preferred embodiment, the collimated exiting light is incident upon a light beam splitter which directs equal portions of the light toward a quadrant photovoltaic cell device and toward a charge couple device (CCD). The CCD is connected to an optoelectronic viewing device for initial calibration, display and monitoring. The photodetector array is connected to a translator/amplifier which increases the photocells' source currents and converts them to equivalent voltages for output to a digital data processing terminal. The processing terminal integrates all simultaneous measurements by vectorial resolution of the voltage related deflections' magnitude and direction.
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申请公布号 |
US5023845(A) |
申请公布日期 |
1991.06.11 |
申请号 |
US19880264734 |
申请日期 |
1988.10.31 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY |
发明人 |
CRANE, ROGER M.;FISCHER, EUGENE C. |
分类号 |
G01B11/16;G01H9/00 |
主分类号 |
G01B11/16 |
代理机构 |
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主权项 |
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地址 |
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