G - Physics – 01 – L
Patent
G - Physics
01
L
73/70
G01L 1/22 (2006.01) G01G 3/147 (2006.01)
Patent
CA 1135973
DEVICE FOR MEASURING THE MAGNITUDE OF A FORCE APPLIED TO THE FREE END OF A CANTILEVER BEAM Abstract The device includes: a set of four strain-gauges mounted on a cantilevered beam, which gauges are electri- cally connected among themselves in the form of a bridge (9), in a manner such that said bridge produces an output voltage (.DELTA.V) which is a function of the magnitude of the force applied to the beam, when the bridge (9) is supplied with current; a source of voltage (10), designed to supply the bridge (9); an analog-to-digital converter (16), con- nected to the output of the amplifier (14), with which there is associated a microprocessor (24); and a display unit (13), connected to an output of the microprocessor (24), which is designed to allow the display of a signal that is representative of the magnitude of the force applied to the beam. In order to eliminate the need for auxiliary sta- bilizing and compensating circuits, required if a high- quality circuit of this type is to be constructed, the analog-to-digital converter (16) is of the two-slope type encompassing switching mechanisms (19, 20) controlled by the microprocessor (24) in order to use the supply voltage (10) as a reference voltage.
331755
Pidoux Paul
Prost Jean-Louis
Gowling Lafleur Henderson Llp
Terraillon
LandOfFree
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