Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Patent
1995-06-05
1997-04-15
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
25055922, 356375, 348126, G01B 1124, H01L 2166
Patent
active
056212186
ABSTRACT:
While relatively transporting a wire to be inspected and a unit including a first light source for emitting a first beam, a second light source for emitting a second beam which intersects with said first beam at a predetermined reference position, and a photodetector for detecting reflection light of said first and second beams derived from said first and second light sources respectively, a relative position between said unit and said wire is detected as a first position when said first beam is reflected from said wire. Then, while relatively moving said unit and said wire, another relative position between said unit and said wire is detected as a second position when said second beam is reflected from said wire. Then, a height of said wire from said reference position is calculated based on an interval between said first and second positions.
REFERENCES:
patent: 4553843 (1985-11-01), Langley et al.
patent: 4801810 (1989-01-01), Koso
patent: 4874956 (1989-10-01), Kato et al.
patent: 5302836 (1994-04-01), Siu
Lee John R.
NEC Corporation
Westin Edward P.
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