Load sensor
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United States of America Patent
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-
Feb 9, 1993
Grant Date -
N/A
app pub date -
Oct 11, 1990
filing date -
Oct 18, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A load sensor is made of a load-sensitive element made preferably of an aluminum alloy, a bridge circuit with strain gauges made preferably of tantalum nitride and formed on the load-sensitive element, and two operational amplifiers with their non-inversion input terminals connected respectively to the signal output terminals of the bridge circuit and their inversion input terminals connected to each other through a temperature-sensitive resistor having a positive second-order temperature coefficient and a precision resistor. The resistance values of these resistors are adjusted so as to compensate for the first-order and second-order temperature coefficients of the temperature-dependent output from the bridge circuit.
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