Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1994-09-13
1996-10-08
Chilcot, Richard
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73581, 73778, G01B 1100, G01L 100
Patent
active
055633480
ABSTRACT:
In a stress measuring, system sensor driving power and a signal sensed by a sensor are transmitted and received in the form of a light pulse signal to thereby improve a noise resistant property as well as a measuring accuracy and reliability. The stress measuring system includes a sensor head disposed at a sensing location and a measuring device disposed at a location remote from the sensing location. The sensor head includes a sensor having a sensing section for sensing a change in stress as a change in the natural frequency of an oscillation string, an output section for outputting a light pulse sensing signal corresponding to the natural frequency sensed by the sensing section and a driving section for causing oscillation at the natural frequency of the oscillation system of the sensing section in response to a driving light pulse signal. The measuring device includes a measuring section for measuring the stress based on the frequency of the light pulse sensing signal and a creating section for creating the driving light pulse signal having the frequency following a change in the natural frequency based on the light pulse sensing signal. The sensor head is connected to the measuring device through optical fibers for transmitting at least the light pulse sensing signal and the driving light pulse signal.
REFERENCES:
patent: 2306137 (1942-12-01), Pabst et al.
patent: 3052116 (1962-09-01), Critchley et al.
patent: 3224279 (1965-12-01), Galli et al.
patent: 3310978 (1967-03-01), Davis
patent: 3403548 (1968-10-01), Petrik et al.
patent: 3871217 (1975-03-01), Miley
patent: 4567451 (1986-01-01), Greenwood
patent: 4841256 (1989-06-01), Gastgeb
patent: 4955238 (1990-09-01), Jones et al.
patent: 5316562 (1994-05-01), Smithgall et al.
patent: 5381005 (1995-01-01), Chazelas et al.
Catalogue of vibrating wire stressmaster (Model VBS-2). Published by Roctest Ltee Ltd. Montreal, Canada.
Feng Qing
Suzuki Hideyo
Yokoi Isamu
Chilcot Richard
Dombroske George M.
Kananen Ronald P.
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