G - Physics – 01 – B
Patent
G - Physics
01
B
33/112
G01B 5/00 (2006.01) G01B 17/04 (2006.01) G01L 1/10 (2006.01)
Patent
CA 1085609
Application of CLARENCE O. BABCOCK For: DISPLACEMENT MEASURING SENSOR ABSTRACT OF THE DISCLOSURE A tensioned helical wire for use as a displacement sensor. The sensor made of high strength piano wire is attached at its ends to two anchors which in turn are attached to or are a part of the object or objects to be tested. In the preferred embodiment the sensor has straight ends which are attached to two small anchor blocks. These blocks are then attached to the test object. The displacement range and sensitivity of the sensor can be controlled by the initial geometry selected. If an initial tension applied is small, the sensor has a very large response range that is about fifty times that of a straight wire sensor. If a large initial tension is applied, the helical shape approaches that of a straight sensor and has a displacement range only a few times that of a straight wire sensor. If the sensor has a large displacement range, the sensitivity is much less than that of a straight wire sensor and if the sensor has a small range the sensitivity is comparable to that of the straight wire sensor. When in place, a readout system can be used to pluck the wire sensor to determine its initial vibratory mode. Should a sensor length change occur, this can be interpreted as a displacement change by using calibration results obtained during the manufac- ture of the sensor or during the installation process. Subsequent readings made by the readout system can be used to measure on a continuing basis the resulting displacement behavior.
301078
Babcock Clarence O.
Kirby Eades Gale Baker
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