SU443331A1 - Phase Match Indicator - Google Patents

Description

one

The invention relates to the field of measurement technology.

Phase coincidence signaling devices are known which are constructed according to a two-channel scheme with phase measurement on the principle of transforming a phase shift into a reference pulse. Such signaling devices contain an amplifier-limiter, a phase comnator, a null-organ of the measuring circuit, a frequency divider, a null-organ of the reference circuit, an indicator, and a trigger.

The moment of phase coincidence is fixed by the indicator, the arrow of which with ideal phase coincidence should be zero, but since the full compensation of counter currents flowing through the indicator connected between the trigger outputs is difficult to obtain, the indicator arrow makes an oscillatory motion near zero, which makes it difficult to fix moment of phase coincidence.

To improve the measurement accuracy, the proposed detector is equipped with an additional null organ, a coincidence circuit, an inverter and a capacitor, each of the two inputs of the coincidence circuit being connected to one of the null organs, respectively, with one input directly connected. and the other, via an inverter, in parallel to one of the inputs of the coincidence circuit is connected via serially connected frequency dividers and a zero-organ one trigger input, the second input

which is connected to the point of a point of series-connected output of the coincidence circuit and a capacitor, the second lining of which is connected to the common case.

The drawing shows a block diagram of the described signaling device comprising amplifier-limiter 1, null organ 2, frequency divider 3, additional null organ 4, coincidence circuit 5, inverter 6, null organ 7,

amplifier-limiter 8, trigger 9, indicator 10, capacitor 11.

The scheme works as follows. The f / on reference voltage after the amplifier of limiter 1 is converted into square pulses, and after the null organ 2, into short pulses that occur when the voltage passes through zero in the positive direction, which are fed to one of the inputs of the coincidence circuit 5. Besides

In addition, the reference voltage after the limiting amplifier through frequency divider 3 and the null organ 4 is fed to one of the inputs of trigger 9. Simultaneously the measured signal Ozzm through the amplifier-limiter 8, zero-organ 7 and

Inverter 6 is fed to the second input of the matching circuit 5. When the phase of the measured signal coincides with the phase of the reference voltage, the signal at the output of the matching logic circuit 5 is zero. Residual emissions of short duration are filtered out by the capacitor 11n to the input of the trigger 9 are not received. Thus, the trigger 9 in this case is controlled by the input to which the null organ 4 is connected and transferred to the position at which the indicator 10 is illuminated, signaling the coincidence of the phases. If the phases do not match, the level of the signal on the indicator 10 is determined by the signal from the output of the logic circuit 5, since the frequency of this signal is higher than the frequency of the signal coming from frequency divider 3 through the zero-organ 4.

Item 13 of the acquisition

Phase coincidence indicator, containing limiting amplifiers, zero-organs, frequency divider, trigger and indicator, characterized in that, in order to improve measurement accuracy, it is equipped with an additional zero-organ, coincidence circuit, inverter and capacitor, each of the two the inputs of the coincidence circuit are connected to one of the zero-organs, respectively, with one input directly connected and the other through an inverter, connected in parallel to one of the inputs of the coincidence circuit via serially connected frequency dividers and zero-organ one input of the trigger, the second input of which is connected to the common point of series-connected output of the coincidence circuit and a capacitor, the second lining of which is connected to the common body.

and