Strain gauge
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United States of America Patent
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May 26, 2009
Grant Date -
Aug 16, 2007
app pub date -
Dec 1, 2004
filing date -
Dec 5, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A strain gauge (10), comprising a silicon strain sensing element (14) for sensing strain with first and second load points (16) and provided with a pair of piezo-resistors (22) located between said load points such that, when said strain sensing element (14) is subjected to tension or compression at said load points, a first of said pair of piezo-resistors (22a, 22b) is subjected to compression and a second of said pair of piezo-resistors (22a, 22b) is subjected to tension, wherein a change in relative resistance of said pair of piezo-resistors is induced by subjecting said strain sensing element to compression or tension.
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