SU533878A1 - Frequency signal fluctuation meter - Google Patents

Description

one

The invention relates to electrical measuring technique and can be used to create multichannel telemetric systems for measuring fluctuations in the carrier frequency.

A device for measuring the frequency deviation from the average value is known, which contains multivibrators, counters, and division elements AND of a code writing scheme.

However, the accuracy of this device is small, and the measurement time is large.

Known meter fluctuations of frequency signals, containing a generator of clock pulses, three waiting multivibrator, multivibrator with adjustable pulse duration, the element And, the static register, block rewriting code in the cumulative counter.

The purpose of the invention is to increase the speed and reliability of the meter.

This is achieved by the fact that in the proposed fluctuation meter of frequency signals the input of the cumulative counter is connected to the output of the element I, the first input of which is connected to the input of the device and the second to the output of the waiting multivibrator with an adjustable impulse duration.

The drawing shows a functional structural diagram of the proposed meter.

It contains a clock pulse generator I, standby multivibrators 2, 3 and 4, a multivibrator 5 with an adjustable pulse duration, a cumulative counter 6, element I 7, a code 8 rewriter unit and a static register 9.

The meter works as follows.

Another clock pulse from the generator

1 starts pending multivibrators 2 and 5,

moreover, the pulse duration of the multivibrator 5 is less than the pulse duration of the multivibrator 2. For a time equal to the pulse duration of the multivibrator 5, through the element 7, a frequency signal arrives at the input of counter 6. During this time, several overflows of the counter 6 occur, and by adjusting the pulse width of the multivibrator 5, the average frequency of the signal corresponds to the filling of half the capacity of the counter 6, and the entire frequency fluctuation range to the full capacity of the counter 6.

When the standby multivibrator 2 is triggered, a zero reset pulse is generated in the register 9 along the “Set. O and multivibrators 3 and 4 are started in series, the pulses of which, respectively, transfer the code from counter 6 to the output register and null the counter on the bus bus. A. With the arrival of the next clock pulse, the whole cycle repeats.

Thus, only the fluctuation part of the measured signal is recorded. At the same time, the linearity characteristic of the electron-counting frequency meters is preserved, but the speed significantly increases due to a decrease in the number of bits of the cumulative counter and the reliability increases due to the simplification of the circuit.

Claims (1)

Invention Formula A fluctuation meter of frequency signals containing a clock pulse generator, the output of which is connected to the input of three series-connected waiting multivibrators and to the input of a multivibrator with an adjustable impulse duration, and the outputs of the series-connected multivibrators are connected respectively to the input of the static register, to the input of the perezanisi code and to the input of the accumulator counter, and the element And, characterized in that, in order to improve speed and reliability, the input of the accumulative counter Not with the output element And, the first input of which is connected to the input of the device, and the second - to the output of the waiting multivibrator with an adjustable pulse duration.