Phase magnitude signal detector

Details Phase magnitude signal detector Phase magnitude signal detector

1995-08-01

1999-05-11

Dombroske, George M.

Measuring and testing

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

Specified electrical sensor or system

73862333, 73DIG2, 73116, G01M15/00

Patent

active

059029340

ABSTRACT:
A magnetostrictive stress and torque sensor using the component of the output signal in-phase with the drive voltage to monitor stress or torque. In some embodiments, it may use the quadrature or out-of-phase component, or some combination of the in-phase and out-of-phase components. Such phase component monitoring has several advantages over magnitude detection, including a response which is a more linear function of torque, and which is not subject to overmodulation problems.

REFERENCES:
patent: 2912642 (1959-11-01), Dahle
patent: 4503714 (1985-03-01), Winterhoff
patent: 4697459 (1987-10-01), Nonomura et al.
patent: 5187433 (1993-02-01), Even
patent: 5419207 (1995-05-01), Kobayashi
Fleming, "Magnetostrictive Torque Sensors -Analysis of Performance Limits", SAE Paper 890483, Feb. 27-Mar. 3, 1989.

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