SU1409951A1 - Fixed frequency phase-meter - Google Patents

Abstract

This invention relates to a radio measuring technique. The purpose of the invention is to improve the accuracy of measuring the average value of the fluctuating phase difference in the O region (360 °). The phase meter contains a starting pulse shaper 1, a resolution trigger 7, a matching circuit 5 and 8, a control trigger 11, a runoff pulse generator 13, a measuring trigger 17, a measuring counter 21, a measuring time trigger 24, a frequency divider 25 and a quantizing pulse generator 26. Switching circuits 2 and 3 coincidences, prohibition trigger 4, prohibition and resolution counters 6 and 9, coincidence circuits 16, 19 and 23, switching trigger 10, phase distributor 12, shaper 14 stock pulses, multiplexer 15, averaging are entered into the device. divider 20 and code storage unit 22. The proposed phase meter automates the process of measurement by automatically eliminating the zone of uncertainty. 2 rsh. with (L with

Description

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The invention relates to radio-1-11ntelnoy technology and can be used to create phase-finders IJI phase meters.

i The purpose of the invention is to increase the point of measurement of the average value of the fluctuation of the phase difference in the area 9 ().

Figure 1 shows the phase diagram of the phase meter at a fixed "frequency;" in fig. 2 - timing charts of start and stop pulses.

The phase meter contains the starting pulse generator 1, switching circuits 2 and 3 matches, inhibit trigger 4, matching circuit 5, inhibiting counter 6, resolution trigger 7, matching circuit 8, resolution counter 9, switching trigger 10, control trigger 11, phase split. body 12, shapers 13 and 14 stop pulses, multiplexer 15, coincidence circuit 16, trigger 17, epithelial trigger 18, coincidence circuit 19, averaging divider 20, from a counter counter 21, code storage unit 22, coincidence circuit 23 trigger 24 measurement time, divider frequency 25 quantizing pulse generator 26.

The output of the starting pulse generator 1 is connected to one of the two inputs of the switching circuits 2 and 3, the second inputs of which are connected to the direct and inverse outputs of the switching trigger 10, respectively, and the output of the matching circuit 2

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c | is connected with the installation input to 1 and {Measuring trigger 18, and the output of circuit 3 coincides with the input of the installation at 1 trigger 1 of prohibition 4, pr - Tsoi whose output is connected to one and | r | th input of which is connected to the output of the generator of 26 quantizing pulses, 8J output to the input of the counter 6 over g | reta, the inverse output of the inhibit trigger 4i is connected to the input of the setup and the prohibition counter 6, output | which is connected to the counting B | RUNNING of the trigger 4 prohibition and the inputs of the | installation in 1 trigger 7 permit- and | and trigger 11 control, direct trigger output 7 connects to one of the inputs of circuit 23 matched | adeni, the other input of which is connected to generator output 26 of the quantum

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The output pulses are connected to the input of the resolution counter 9, the installation input of which is connected to the inverse output of the resolution trigger 7, the output of the resolution counter 9 is connected to the counting inputs of the resolution trigger 7 and the control trigger 11, and the input of the installation to the 1 switch 10. The reference signal channel contains a phase splitter 12, the outputs of which are connected, to the inputs of the formers 13 and 14 stop pulses, the outputs of which are connected to the information inputs of the multiplexer 15, the output of which is connected to the installation input in O meas a flip-flop 18 and one of the inputs of the coincidence circuit 16, the other input of which is connected to the output of the control trigger 11, and the output to the control input of the reversible measuring counter 21 and to the installation input to 1 of the trigger 17, the output of which is connected to the control inputs of the multiplexer 15 .

- The output of the measuring trigger 18 is connected to one i of the inputs of the coincidence circuit 5, the output of which is connected to the input of the averaging divider 20, the output of which is connected to the summing input of the reversible measuring counter 21, the input of the code of which is connected to the output of the code 22 storage unit 180, the output a quantizing pulse generator 26 is connected to the input of a matching circuit 8, the output of which is connected to the input of a matching circuit 5 and the input of a divider 25, the output of which is connected to the input of a trigger 24, the output of which is connected to another input of a circuit 8 that matches and

Phase meter works as follows.

According to FIGS. 1 and 2, the operation of the phase meter starts with the supply of a trigger pulse from. In this case, all the triggers and counters are set to the zero state.

The measuring sinusoidal signal is fed to the input of the driver 1 starting pulses. At its output, short starting pulses are formed along the positive zero-sinusoidal input signal. The reference sinusoidal signal arrives at the input of the phase splitter 12. From the output of the phase splitter, the antiphase signals arrive at the formers 13 and 14 of the stop pulses. The stop impulses are similar to the starting ones.

After the trigger pulse has been applied and the switching trigger 10 is set to zero, the match circuit 2 is triggered and the coincidence circuit 3 is opened. The first starting pulse, the passage through the coincidence circuit 3, opens the inhibition trigger 4 and opens the coincidence circuit 19 to pass quantum impulses to the inlet of the inhibition counter 6. Counter 6 counts the number of pulses corresponding to a phase shift of 360 -d. During this entire time, the 16 coincidence circuit is closed for passage

A switching trigger 10, which closes the coincidence circuit 3 and opens the coincidence circuit 2 for passing the start pulses to the measurement trigger 18. The measurement trigger 18 reverses and the normal phase meter operation begins with a pulse conversion.

In the case when the stop pulse from the generator / Ou output falls into the 2o uncertainty zone (it passes through the coincidence circuit 16 to the control input of the reversible measuring counter 21 and a code corresponding to 180 ° is written to the counter and also triggers the trigger 17, which to the control inputs of the multiplexer 15, allowing

no stop impulses to the control Q to ensure the passage of stop impulses to the input of the reversible measuring counter 21 trigger 17 is in and

the zero state and the output of the multiplexer 15 pass from the forma- tor body 13 stop pulses generated by a positive transition through the O of the input reference signal. If the stop pulse passes to the measuring trigger 18, it does not change its zero state, the coincidence circuit 19 remains closed and the quantizing pulses from the generator 26 are not fed to the input of the measuring counter 21. When the inhibitor counter 6 counts the number of pulses corresponding to the phase a shift of 360 ° - oC, then a signal appears at its output, which overturns control trigger 11 and resolution trigger 7, which open the coincidence circuit 16 and 23 to pass stop pulses to the reverse control input measure nogo counter 21 and pulse quantizing resolution on counter 9, the capacitance of which corresponds to a phase shift of 2, i.e. zone of uncertainty.

The overflow signal from the prohibition counter 6 also trips the prohibition trigger 4, which closes the coincidence circuit 19 and resets the prohibition counter 6 to O.

The overflow signal from the resolution counter 9 overturns the resolution trigger 7, which closes the coincidence circuit 23, resets the resolution counter 9 to 0, overrides the control trigger 11, which closes the coincidence circuit 16 and the overlays 25

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from the output of shaper 14, i.e. pulses generated by a negative zero crossing of the input reference sinusoidal signal at the input of the matching circuit 16.

A rough estimate of the phase difference, i.e. establishing the fact that a stop impulse is falling or not falling into the zone of uncertainty can be done not by one pair of start-stop impulses, but by several. For this, instead of trigger Y, it is enough to turn on the counter.

Thus, the invention eliminates the error in determining the average value of the phase difference fluctuating around 0 ° (BdO). At the same time, the measurement time increases slightly, since the zone is estimated for 1 station over the period of the input signal, and the elimination is usually done from several thousand individual measurements.

In addition, the invention automates the measurement process, since the phase meter automatically eliminates a zone of uncertainty.

Claims (1)

Invention Formula 40 45 A fixed frequency phase meter, containing a starting and stop pulse formers, a measuring trigger, two coincidence circuits, a measuring time trigger, a frequency divider, a measuring counter and a quantizing pulse generator, the output of the measuring trigger is connected to the first input of the matching circuit, the second input of which is connected to the output interrupts the passage of stop impulses from the output of shaper 14, i.e. pulses generated by a negative zero crossing of the input reference sinusoidal signal to the input of the matching circuit 16. A rough estimate of the phase difference, i.e. establishing the fact that a stop pulse does not fall into the zone of uncertainty can be done not by one pair of start-stop pulses, but by several. To do this, instead of trigger Y, it is enough to turn on the counter. Thus, the invention eliminates the error in determining the average value of the phase difference fluctuating around 0 ° (BdO). At the same time, the measurement time increases slightly, since the zone is estimated over the period of the input signal, and the elimination is usually carried out from several thousand individual measurements. In addition, the invention automates the measurement process, since the phase meter automatically eliminates a zone of uncertainty. Invention Formula A fixed frequency phase meter containing starting and stop pulse drivers, a measuring trigger, two coincidence circuits, a measuring time trigger, a frequency divider, a measuring counter and a generator of quantizing pulses, the output of the measuring trigger connected to the first input of the coincidence circuit, the second input of which connected to the output in the same match circuit and with the input D frequency glitter, the output of which is connected to the trigger input of the measurement time, the output of the latter is connected the first input of the second coincidence circuit, the second input of which is connected to the output of a quantum pulse generator, characterized in that, in order to improve the accuracy of determining the average value of the fluctuating phase difference in the O® region (360), two switching coincidence circuits are introduced in it, a trigger ban and a ban counter, three matching schemes, a resolution trigger and a resolution counter, switching. and controlling triggers, a 180 ° code storage unit, an averaging divider, a phase splitter, a stop pulse shaper, a multiplexer, three the generator, with the outputs of the phase-11; the detector is connected to the inputs of the stop pulse generators, the outputs 1: the secondary ones are connected to the information inputs of the multiplexer, the output of which is connected to the input of the It O installation of the measuring trigger and the first input of the third coincidence circuit, the second input of which is connected to control trigger output and a) output - with control to the input of the measuring counter and with the installation input into 1 trigger whose output (Connected to the control inputs of the multiplexer, the outputs of the storage unit ofj, a 180 ° are connected to the inputs input five the code of the measuring counter, the pulse input of which is connected to the output of the averaging divider, the input of the latter is connected to the output of the coincidence circuit, and one of the inputs of switching coincidence circuits is connected to the output of the starting pulse generator, and others with the outputs of the switching trigger. 1 is connected to the output of the resolution counter, the counting inputs of the control trigger and the resolution trigger, the output of one of the switching coincidence circuits is connected to the installation input 1 of the measuring trigger, output d Correspondingly, with the installation input into 1 prohibition trigger, whose direct output is connected to the first input of the fourth coincidence circuit, the second input of which is connected to the output of the quantum-oscillator, and the output to the input of the prohibition counter, the inverse output of the trigger is connected to the installation input to About the prohibition counter, the output of which is connected With the counting input of the prohibition trigger and the installation input into 1 enabling and control triggers, the direct output of the permission trigger being connected to one of the inputs of the fifth coincidence circuit, the second input of which connected to the output of the quantizing pulse generator, and the output to the pulse input of the resolution counter, the installation input of which is connected to the inverse output of the resolution trigger. 0 five 0 .2