Measuring and testing – Dynamometers – Responsive to force
Reexamination Certificate
1998-10-30
2001-02-20
Noori, Max (Department: 2855)
Measuring and testing
Dynamometers
Responsive to force
C073S779000
Reexamination Certificate
active
06189391
ABSTRACT:
The present invention relates to a linear drive having a device for sensing and evaluating an operational force acting thereon.
Such a linear drive is known from U.S. Pat. No. 4,977,782. In this patent, the device for sensing and evaluating an operational force acting on the drive is a torque-measuring device which is installed at a weak point of the housing.
The older, non-prepublished application EP 0 737 831 A 1 also describes a device of the generic type.
The present invention is concerned with the problem of providing a device of the generic type which is of as simple a design as possible and operates satisfactorily and with a high degree of precision.
By means of such combination and arrangement of a plurality of magnetostrictive sensors, it is possible to measure forces which occur transversely with respect to the longitudinal axis and which are particularly detrimental to the operational reliability of a linear drive which is designed, for example, as a spindle drive.
In particular, an electromotively powered linear drive according to the invention can be advantageously controlled in an open-loop and/or closed-loop fashion as a function of the signals of the magnetostrictive force sensor.
Magnetostrictive force sensors are known per se, for which reason it is not necessary to provide further explanations at this point.
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Spohr Hans-Hermann
Wittenstein Manfred
Collard & Roe P.C.
Noori Max
Wittenstein Motion Control GmbH
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