Load Sensor And Manufacturing Method Of The Same
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United States of America Patent
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Issued Date -
Apr 10, 2008
app pub date -
Jul 14, 2005
filing date -
Jul 14, 2004
priority date (Note) -
Abandoned
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Abstract
An object of the present invention is to provide a low cost load sensor while securing compact dimensions, high reliability and quality, and also to provide a manufacturing method of the load sensor. To this end, there is provided a load sensor provided with a thin-plate-like sensor plate 5 and plural strain gauges 21a to 22d attached to the sensor plate 5, wherein both ends of the sensor plate 5 in one axis direction thereof serve as fixing parts for fixing the sensor plate 5 to an arbitrary object, while the center point C of the sensor plate 5 serves as a transmission part for transmitting a displacement or a load to the sensor plate 5, wherein the strain gauges 21a to 22d are arranged in positions which are point symmetrical with respect to the center point C, and gauge pairs are constituted by making pairs of the strain gauges 21a to 22d which are arranged in point symmetrical positions electrically connected in parallel or in series with each other, and wherein the respective gauge pairs are electrically connected in series with each other to constitute a bridge circuit with the strain gauges 21a to 22d.
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