Signal rectifier, especially for magnetoelastic transducers

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

G - Physics

01

L

73/3, 73/68

G01L 1/12 (2006.01)

Patent

CA 1191709

ABSTRACT OF THE DISCLOSURE Force measuring equipment has a magnetoelastic trans- ducer 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 rever- sing 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.

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