SU634083A2 - Touch-free eddy-current sensor - Google Patents

Description

I

The invention relates to the technique of electrical measurement of non-electrical quantities and can be used in the control of displacements, vibrations and angular displacements.

According to the main author. St. 496459 a non-contact eddy current sensor is known that contains a dielectric core with a current coil, an electromagnetic shield, a measuring coil arranged symmetrically with respect to the current coil, while the current coil is made in the form of a figure of two out of two semi-windings located symmetrically with respect to the screen, and the output and the outputs and the outputs will be connected. connected to the recorder of displacements and vibrations, and the outputs of the measuring coil - to the recorder of angular displacements.

A disadvantage of the known sensor is the fact that its accuracy depends on the mutual arrangement of the sensor and the product being monitored, since the current coil of the sensor creates an anisotropic electromagnetic field.

In order to improve the accuracy of the current, the katui is made of an arbitrary number of semi-windings connected in structurally and

axis symmetry 1P semi-windings are offset by an angle in the plane of the rollers.

The drawing shows the proposed sensor.

He HNreeT current coil 1 and electromagnetic screen 2.

The sensor works as follows.

When voltage is applied to the current coils 2, a uniform magnetic field occurs. Since the current coils consist of several parts, having the shape of a figure eight, the sensor is not critical to the object of control, which ultimately leads to its accuracy.

Form of invention

Contactless eddy current sensor according to author. St. .NO 496459, characterized in that, in order to improve the accuracy, the current coil is made of an arbitrary number of windings connected in series, and the axes of symmetry are offset in an angle in the plane of the pockets.