Measuring and testing – Specimen stress or strain – or testing by stress or strain... – In static structures
Patent
1989-03-29
1990-08-14
Myracle, Jerry W.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
In static structures
33366, G01M 500
Patent
active
049476920
ABSTRACT:
A plumb weight hung onto a plumb wire anchored firmly at one end bears a laser light emitter which lies opposite a stationary photoelectric receiver. The receiver has a photodetector arrangement which is connected downstream of an optical system and a matt screen. The light emitter and receiver form an optical position measuring system. Relative movements between the anchoring point of the plumb wire and hence between the plumb body and the receiver transverse to the vertical direction result in a change of the position of the point of incidence of the light beam on the photodetector arrangement. By measuring the respective position of this light spot, the degree of movement of the plumb body and hence of the plumb wire anchoring point relative to the receiver can be determined.
REFERENCES:
patent: 3880528 (1975-04-01), Petersen et al.
patent: 4206550 (1980-06-01), Boyett et al.
patent: 4627172 (1986-12-01), Afromowitz
patent: 4812654 (1989-03-01), Araujo
Patent Abstracts of Japan, vol. 10, No. 102 (P-448) (2159), Apr. 18, 1986.
Physical Instruments, Huggenberger AG, Zurich, Telecoordinator.
Gesellschaft Zur-Forderung der Industrieorientierten Forschung A
Meller Michael N.
Myracle Jerry W.
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