Force measuring transducer

Details Force measuring transducer Force measuring transducer

2006-10-17

2006-10-17

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

Specified electrical sensor or system

C433S071000

Reexamination Certificate

active

07121148

ABSTRACT:
The invention relates to a force measuring transducer with an oscillator (1) with an inductor (2) formed by a primary winding and a gauge (11) with a secondary winding (30) which is connected electroconductively to the gauge (11) and which is disposed in transformer coupling with the inductor (2) of the oscillator (1). Action of a force on the gauge (11) changes the impedance of the gauge (11) and the load of the inductively coupled secondary winding (30). An evaluation circuit (14) is used to determine the resulting frequency change of the oscillator (1) which is proportional to the force acting on the gauge (11).

REFERENCES:
patent: 3617878 (1971-11-01), Senour
patent: 4006628 (1977-02-01), St. Jacques
patent: 4592727 (1986-06-01), Bloomfield
patent: 37 35 657 (1988-05-01), None
patent: 44 20 691 (1996-01-01), None
patent: 1 585 549 (1981-03-01), None
patent: 5-31130 (1993-02-01), None

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