Measuring and testing – Dynamometers – Responsive to force
Patent
1995-05-08
1996-05-14
Chilcot, Richard
Measuring and testing
Dynamometers
Responsive to force
177211, G01G 314
Patent
active
055157378
ABSTRACT:
To facilitate the adjustment of the accuracy and servicing maintenance of the electronic weighing apparatus, the weighing apparatus comprises a load cell and a signal processing circuit for processing a load signal from the load cell to provide a weight signal indicative of the load. The load cell includes a strain inducing element capable of producing strains in proportion to the load imposed thereon, and a bridge circuit, having a pair of strain gauges fixed on the stain inducing element and a plurality of resistors. A load signal is taken from a junction between the strain gauges and reference voltage signals are taken from junctions between the resistors. The load signal and the reference voltage signals are supplied to the signal processing circuit. If each of the strain gauges is employed in the form of a temperature compensating resistor having a characteristic effective to compensate for both of the temperature coefficient of thermal expansion of the strain inducing element and the temperature coefficient of the Young's modulus, the number of necessary component parts can be reduced.
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Imai Kenji
Naito Kazufumi
Artis Jewel V.
Chilcot Richard
Ishida Co. Ltd.
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