G - Physics – 01 – L
Patent
G - Physics
01
L
73/70
G01L 1/22 (2006.01)
Patent
CA 1119830
ABSTRACT OF THE DISCLOSURE A strain-gage transducer incorporating a plurality of electrical-resistance strain gages coupled together in a bridge network is caused to remain zero-balanced under varying-tempera- ture conditions by way of dual-resistance foil-type unit inter- posed at one of the output corners of the bridge with its two like foil-resistance elements occupying adjacent arms. The foil material is selected to exhibit a resistance change with tempera- ture representing a factor which enables a target room-tempera- ture measurement to be calculated once a rate of change of bridge output with temperature has been determined from measurements taken while the unstrained transducer is held at different tempera tures. Relatively broad surfaces of the foil elements are left exposed, and the unit of which they are a part is so disposed in relation to the transducer structure that the exposed foil is accessible for controlled erasure-type abrasion which will bring about the target measurement and attendant compensation.
339332
Bofors America Inc.
Marks & Clerk
LandOfFree
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