Signal rectifier, especially for magnetoelastic transducers

Details Signal rectifier, especially for magnetoelastic transducers Signal rectifier, especially for magnetoelastic transducers

1983-04-15

1984-08-28

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to force

73DIG2, G01L 112

Patent

active

044676620

ABSTRACT:
Force measuring equipment has a magnetoelastic transducer with an excitation winding supplied with alternating current, which generates a primary flux in a magnetic core of the transducer, and a measuring winding in which a signal voltage is induced, the signal voltage giving a measure of the force applied to the transducer core. The signal voltage is supplied to signal processing members which are arranged to form an output signal by phase-sensitive rectification of the signal voltage. Control members sense when the primary flux passes a positive and a negative reference level, and switch polarity reversing members at the times during each period of the AC supply when the primary flux with a certain sign of its time rate of change passes the positive reference level and with the opposite sign of its time rate of change passes the negative reference level.

REFERENCES:
patent: 2732713 (1956-01-01), Willits
patent: 3861203 (1975-01-01), Dahle
patent: 4100794 (1978-07-01), Meixner

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