Device for the contactless indirect electrical measurement of th

Details Device for the contactless indirect electrical measurement of th Device for the contactless indirect electrical measurement of th

1987-10-15

1989-02-21

Ruehl, Charles A.

Measuring and testing

Dynamometers

Responsive to torque

73DIG2, G01L 310

Patent

active

048054666

ABSTRACT:
A device for the contactless indirect electrical measurement of the torque at a shaft utilizing the Matteucci effect in which the shaft is located in an induced magnetic direct-axis field. Upon torsion of the shaft, the change in magnetization in the shaft itself is not measured, but rather a measuring layer applied to the shaft is metrologically detected by the device. In order to avoid disturbing influences from the basic magnetization of the shaft on the measuring layer, a further layer is applied to the shaft, which short-circuits the magnetic flux resulting from the basic magnetization of the shaft, the measuring layer being magnetically decoupled from the inner layer by a highly nonmagnetic layer between the inner, further layer and the measuring layer.

REFERENCES:
patent: 3861206 (1975-01-01), Kawafune et al.
patent: 4416161 (1983-11-01), Barkhoudarian

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