Development of Non-contact Probe for Continuous Measurement of Surface Inclination and Position Using Dynamic Irradiation of Light Beam
Author: Kee Sein Lee
Publisher:
Published: 1992
Total Pages: 282
ISBN-13:
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Author: Kee Sein Lee
Publisher:
Published: 1992
Total Pages: 282
ISBN-13:
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Publisher:
Published: 1961-05
Total Pages: 88
ISBN-13:
DOWNLOAD EBOOKThe Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
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Published: 1996
Total Pages: 296
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DOWNLOAD EBOOKAuthor: Takeo Kanade
Publisher:
Published: 1983
Total Pages: 11
ISBN-13:
DOWNLOAD EBOOKThe authors developed a noncontact proximity sensor which can measure the distance and orientation of a surface in a range of four to five centimeters. The sensor is based on the scheme of active illumination and triangulation. It uses multiple infrared LEDs(light emitting diodes) as the light sources and a PIN-diode area sensor chip for detecting the spot positions. Six LEDs with optics for collimating the beam are mounted at the sensor head. The directions of the beams are aligned to form a cone of light converging at a distance of 4.5 cm from the sensor head. As each LED is sequentially pulsed, the sensor chip detects the position, in its field of view, of the spot projected by the LED light beam on the object surface. The 3-D location of the spot on the surface can be computed by triangulation. By doing this for six LEDs a set of six 3-D points is obtained. Then by fitting a plane to those points, the distance and orientation of a small portion of the object surface are calculated. Since there is no moving part and the spot position sensor chip is a analog sensor which outputs the position of the spot directly without scanning its field of view, fast operation of the proximity sensor can be realized. Currently the sensor can give approximately 1000 measurements of distance and orientation per second with precision of 0.07 mm for distance and 1.5 deg for surface orientation. This non-contact proximity sensor will be useful for such applications as tracing an object surface by a robot arm with specified distance and orientation relative to the surface. (Author).
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Published: 1997
Total Pages: 2240
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Publisher:
Published: 1987
Total Pages: 232
ISBN-13:
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Publisher:
Published: 1993
Total Pages: 354
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1961-05
Total Pages: 88
ISBN-13:
DOWNLOAD EBOOKThe Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Author:
Publisher:
Published: 1987
Total Pages: 956
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1961-05
Total Pages: 88
ISBN-13:
DOWNLOAD EBOOKThe Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.