Strain sensorextensiometer

Details Strain sensorextensiometer Strain sensorextensiometer

1976-06-04

1977-12-27

Ruehl, Charles A.

Measuring and testing

Ductility or brittleness

73141A, 338 6, G01B 716, G01L 122

Patent

active

040647447

ABSTRACT:
A strain sensor or extensiometer with electrical output designed to measure relative displacements between two axially spaced points on a stressed structure comprising an elongated body with two end sections and a centrally located flexible beam extending in a direction perpendicular to the longitudinal axis of the sensor body. Relative displacements of the end sections generate two opposing symmetrical torques at the ends of the beam. These torques or bending moments are impressed onto the beam through two sets of flexible bridges which are symmetrically located but unequally spaced on opposite sides of the beam. These two torques or couples cause the beam to bend evenly over its entire length. Resistance strain gages bonded to both sides of the beam at its center measure this bending.

REFERENCES:
patent: 2561318 (1951-07-01), Ruge
patent: 2801388 (1957-07-01), Ruge
patent: 3221283 (1965-11-01), Ziggel
patent: 3559467 (1971-02-01), Gurol et al.
patent: 3743041 (1973-07-01), Videon
NBS Technical News Bulletin, vol. 42, No. 7, 7/1958, pp. 134-137.

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