| 摘要 |
The invention describes a contactless, inductively coupled leakage flux torque sensor and a method for measuring the torque by determining the change in the leakage flux at a point of discontinuity on the surface as a result of a twisting strain. Two identical, mirror-image points of discontinuity are formed on a ferromagnetic part. The points of discontinuity can occur in groups of slots or ferromagnetic projections on the surface of the end face of the ferromagnetic part. As a result of twisting strain on the part, the points of discontinuity change their shape or size or are displaced, thus causing a change in the leakage flux. The change in the leakage flux is detected by two coils connected in a differential arrangement. A modulator/demodulator circuit guarantees the determination of the torque as a function of the changed flux.
|
