Load cell having strain gauges of arbitrary location

Details Load cell having strain gauges of arbitrary location Load cell having strain gauges of arbitrary location

2007-03-13

2007-03-13

Gibson, Randy W. (Department: 2841)

Measuring and testing

Dynamometers

Responsive to multiple loads or load components

C073S862044, C177S211000

Reexamination Certificate

active

11152761

ABSTRACT:
A load cell utilizes a plurality of strain gauges mounted upon the load cell body such that there are six independent load-strain relations. Load is determined by applying the inverse of a load-strain sensitivity matrix to a measured strain vector. The sensitivity matrix is determined by performing a multivariate regression technique on a set of known loads correlated to the resulting strains. Temperature compensation is achieved by configuring the strain gauges as co-located orthogonal pairs.

REFERENCES:
patent: 4640138 (1987-02-01), Meyer et al.
patent: 5850044 (1998-12-01), Spletzer
patent: 5889214 (1999-03-01), Kang et al.
patent: 5969268 (1999-10-01), Sommerfeld et al.
patent: 6247372 (2001-06-01), Spletzer
Boresi et al., Advanced Mechanics of Materials, p. 95, 5th ed., Wiley and Sons, Inc., ISBN 0-471-55157-0.
Timoshenko et al., Theory of Elasticity, pp. 354,359, 3d ed., McGraw-Hill Book Co., ISBN 07-064720-8.

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