SU469099A1 - Digital phase meter - Google Patents

Description

and a single input with an output of a second coincidence circuit, connected by its potential input to a single output of a control trigger. The counting pulse generator is connected to the pulse input of the fourth and fifth coincidence circuits. The output of the fourth coincidence circuit is connected to the addition counter of the reversible counter.

FIG. 1 shows a phase meter diagram; in fig. 2 - stress diagrams.

The digital phase meter contains the forming devices 1 and 2, the matching circuitry 3-7, the controlling trigger trigger 8 for the counting reverse trigger trigger 10, the counting pulse generator 11, and the reversing counter 12.

The input voltages t / i, t / 2 are fed to the shaping devices, which emit GI pulses, "2, ...; 61, bz, ..., tied to positive zero crossings of input voltages. The pulse ai is fed to the pulse input of the coincidence circuit 3, the potential input of which is valveted by the inverted output of the control trigger 8. The trigger 8 is transferred to the one-pulse state bi from the shaping device 2, which arrives at the counting input of the trigger 8. The coincidence circuit 3 is triggered. The receipt of pulses by a trigger 8 translates it into an inverted L condition, therefore, circuit 3 does not trigger a match from pulse az, etc. Thus, circuit 3 matches gives odd pulses a az, ...

The impulse Oi arrives at a single input of the trigger 10 of the direct count, transferring it to a single state. The pulse bi is supplied to a coincidence circuit 4, which is valveted by a single output of flip-flop 8, which ensures that the even impulses bz, b, ... pass through the circuit 4. To a coincidence circuit 5, which is vented by the single outputs of trigger 9 of the reverse counting and trigger 10 direct counts, the pulses bi, & 2 are received. Scheme 5 coincidence is triggered by impulses bz and subsequent odd impulses bb bf, ... Scheme 6 coincidences are valveised by the inverted output of flip-flop 9. Thus, coincidence circuit 6 permits the passage counting pulses from the generator 11 to the side of the summation of the reversible counter 12 for the time period СЬ Ьг, corresponding to a phase shift of 360 ° -f (f is the measured phase shift).

The coincidence circuit 7 is valvedated by a single output of the trigger 9, therefore the arrival of the pulse bz triggers the circuit 7 of coincidence and the passage of the counting pulses to the subtraction bus of the reversible counter 12. The cut-off occurs after the arrival of the pulse Lz to the inverted input trigger. Thus, the coincidence circuit 7 permits the passage of counting pulses during the time interval bz, bz corresponding to the phase shift. As a result, the phase shift measurement is made as (360 ° + f) - -360 °.

NOTICE of invention

A digital phase meter containing shaping devices, a direct count trigger, the single output of which is connected via a matching circuit with the addition of the counter, the pulse input of the matching circuit is connected to a counting pulse generator, characterized in that, in order to improve measurement accuracy and reliability operation, the phase meter is equipped with an o6paiHoro count trigger, a control trigger and additional coincidence circuits, the first of which is connected by its pulse input to the first shaping device, and the potential input - with an inverted output of a control trigger connected by its counting input with a second shaping device and with pulse inputs of a second and third coincidence circuit, while the output of the first coincidence circuit is connected to a single input of a direct count trigger, the inverted input of which is associated with the output of the third circuit a match connected by the first potential input with a single output of the countdown trigger and with the first potential input of the fifth match circuit whose output is connected to the subtractor

reversible counter, and the second potential input - to the second potential inputs of the third and fourth coincidence circuits and to the single output of the forward count trigger; the inverted output of the countdown trigger is connected to the first potential input of the fourth coincidence circuit, and the single input to the output of the second coincidence circuit, connected by its potential input to the single output of the control trigger,

the counting pulse generator is connected to the pulse inputs of the fourth and fifth coincidence circuits, and the output of the fourth coincidence circuit is connected to the addition bus of the reversible counter.

FIG. one