SU132332A1 - Vibrating galvanometer - Google Patents

Description

The proposed vibratory galvanometer refers to the well-known ooze of radiation galvanometers with a light pointer, the movable system of which is equipped with a mirror reflecting the beam from the light source on the i-dial scale.

A feature of this vibrating galvanometer is the use of iris for the non-periodic interruption of the light beam with the frequency of vibration of the movable galvanometer system. The phase shift of the AC voltage at the bridge output pa 180 ° light bar on the scale of the galvanometer is located on one or the other side from the bullet point of the scale of the galvanometer.

Such a galvanometer makes it possible not only to measure the amplitude of the AC voltage, but also to determine the phase shift between the measured and control voltages.

The presence of a device for periodically interrupting a light beam makes it possible to use a vibrating galvanometer as a null indicator for bridge circuits, since it makes it possible to observe the direction in which the bridge circuit should be balanced.

FIG. 1 is a schematic diagram of the proposed galvanometer; in fig. 2 shows the layout of the illuminated part of the scale.

A measured voltage is applied to the frame / vibration galvanometer, rigidly bonded to the mirror, 2. The beam of light from the illuminator 3 hits the mirror 2 and is reflected from it to the scale 4. The width of the illuminated part of the scale depends on the amplitude of oscillations of the frame with the mirror. The light beam is interrupted by a synchronous motor 5, coaxially with a shutter 6, or modulated by applying a control alternating voltage and a bias voltage, which dispels the illuminator from a single half period, to the illuminator 3, which can be made in the form of a neon lamochka.

FIG. Figure 2 shows the location of the illuminated part of the npri scale of different angles of the phase shift of the measured voltage relative to the control.

When ioding on the proposed vibration galvanometer of the voltage bridge measured in the diagonal, the bridge is equalized in amplitude, and the process of balancing and acceleration is accelerated due to the possibility of observing a phase shift.

Subject invention

A vibrating galvanometer with a light pointer, the butt of which the system is equipped with a mirror reflecting the beam from the source, the light on a fixed scale, and so on, in order to determine the change in the phase of the oscillations supplied to the galvanometer, a device for periodically interrupting a light beam with a frequency of vibration of a moving galvanometer system, made, for example, in the form of a disk with a gap, fixed on the axis of a synchronous motor, powered by an alternating current of the same frequency, and vibrating gal vanometr.

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