SU556518A1 - Motion detector - Google Patents

Description

one

The invention relates to automation and can be used in automatic control, regulation and control systems for signaling changes in peelectric values.

Displacement transducers are known that contain a moving permanent magnet, in a magnetic field of which magnetic contacts 1 are located.

Such motion detectors have a large travel differential between the points of actuation and release of the magnetically controlled contacts along the line of movement of the permanent magnet, but a complicated adjustment.

Of the motion detectors, the closest to the technical essence of the invention is a device 2 comprising a movable permanent magnet located between the excitation winding enclosing the actuating magnetically controlled contacts and the control magnetically controlled contact connected in series with the excitation winding.

The scope of the detector is limited, since the actuating contacts are controlled by one pole of the permanent magnet, and the control magnetically controlled contact is controlled by the other pole.

When replacing a permanent magnet with another, of greater or lesser length, it is necessary to adjust the motion detector again, changing the relative position of all magnetic contacts, which greatly complicates the process of adjustment. In addition, in the device it is necessary that both poles of the permanent magnet are free, i.e., not mechanically connected to the actuators, which is not always the case.

The purpose of the invention is to simplify the adjustment of the alarm indicator Repep1, Enp, which allows the use of permanent magnets of various types.

length without additional adjustment of the elements of the detector.

In the motion detector, which contains a movable permanent magnet located between the excitation winding enclosing the actuating magnetically controlled contacts and the control magpit / control contact connected in series with the excitation winding, these magnetically controlled switches are located in the zone of one pole of the permanent magnet whose flow directed opposite to the flow winding de-vac.

The drawing schematically shows a motion detector.

In the motion detector, the post magnet 1 field of the pole acts on the actuating magnetically controlled contacts 2 and the control magnet TAC 3, which controls the excitation winding 4. The magnetic flux Fo of this winding 4 is directed oppositely to the magnetic flux Oi of the permanent magnet 1 and acts on the magnetically controlled contacts 2.

In the initial position, pins 2 and 3 are open. As the permanent magnet 1 moves toward the magnetically controlled contacts 2 and 3, the flux level F1 increases. Magnetic-controlled contacts 2 and 3 are located in such a way that they operate simultaneously or contacts 2 are somewhat earlier than contact 3. After the magnetic-controlled contact 3 is triggered, winding 4 will be included in the supply circuit and flow F2 will appear. Magnetic control pins 2 are affected by magnetic flux. In this case, the magnitude of the current F2 is easily regulated by the amount of current through the winding 4.

When the permanent magnet 1 moves in the initial position, the magnetic contacts 2 are first released, since they are affected by the magnetic flux Ф1-Фз, which is smaller in magnitude than the notes Фу acting on the magnetic contact 3. By adjusting the flux F of the control winding achieve magnetic control

Pins 2 opened at the required magnitude of the final displacement of the permanent magnet.

Thus, the magnitude of the travel differential between the points of operation and release of the magnetically controlled contacts 2 along the line of movement of the permanent magnet, determined by the difference in the flow levels F1-F2, is provided by adjusting the magnitude of the current F2, which greatly simplifies the entire adjustment process.

Claims (2)

Invention Formula A motion detector comprising a movable permanent magnet, located between the excitation winding enclosing the actuating magnetically controlled contacts and the control magnetically actuating contact connected in series with the excitation winding, characterized in that, in order to simplify the adjustment, these magnetically controlled contacts are located in the zone of one zero pole magnet, the flow of which is directed opposite to the flow of the excitation winding. Sources of information taken into account at the examination: 1 Avt. No. 289969, cl. H 01H 3/00, 1969. 2. Auth. St. No. 238014, cl. H 01H 47/00, 1967 (prototype).