SU1442969A2 - Device for measuring time intervals - Google Patents

Abstract

This invention relates to an т-pulse technique. The purpose of the invention is to improve the accuracy of measuring the duration of time intervals while reducing the pulse duration. The device contains a reference frequency generator 1, elements AND 2 and 3 and element OR 6, counter 9, driver 4 pulses and one-shot 7, Introduction of driver 5 pulses and connected to the resistor parallel to the resistor of the reference circuit one-shot 7 of the key element B increases the accuracy of measuring the duration time intervals representing the final sequence of HNS pulses with a decrease in the pulse duration period. 3 il.

Description

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The invention relates to a pulse technique, can be used to measure time intervals, and is an improvement of the known device according to the author. St. No. 1218364.

The aim of the invention is to improve the accuracy of measuring the duration of the time interval while reducing

the period of the pulse, the composition of the element OR 6 appears one pack

SLAGOZTICH time interval.

FIG. 1 shows a block diagram of a device for measuring time intervals; in fig. 2 -.

pulses of the generator 1, the number of pulses in which is proportional to the sum of the duration d of the time interval and the duration I g of the pulse of the one-digit diagram of the device 15 operation 7.

impulses in a long and long

va; in fig. 3 is an example of a diagram of the construction of an oscillation odor-vibrator.

A device for measuring time intervals contains (FIG. 1) I etiepator 1 of the reference frequency, first 2 and second 3 elements AND, first 4 and second 5 pulse drivers element OR 6, single 7, key element 8, and counter 9,

The output of the generator 1 of the reference frequency is connected to the primary input of the first 2 and second 3 elements AND, the outputs of elements AND 2 and 3 element OR

6 are connected to the input of the counter 9 pulses, the first driver 4 PM pulses and the one-shot 7 are connected in series, the output of the one-shot

7 is connected to the second input of the second element IZ, the second driver 5 pulses and the key element 8 are connected in series, the input of the second driver 5 of the pulses is connected to the input bus of the device, to the second input of the first element And 2 and to the input of the first driver 4 and m: ul and the first and second outputs of the key element 8 are connected to the second

and the third inputs of the one-shot 7, the one-shot 7 (fig.Z) contains the elements AND NOT 10 - 12, the capacitor 13 and the resistor 14,

The device works as follows.

When a device of a time interval tfl, representing a finite sequence of pulses, arrives at the initial ujmiy, a bursts of generator 1 of the reference frequency appear at the output of element I 2, the number of pulses in proportion to the duration L of the corresponding 1X time pulses . interval, at the output of the element And 3 there are packs of pulses .g;

4429692

rator 1, the number of pulses in which

proportional to the duration f of the corresponding intervals between adjacent pulses of the time interval, and one pch of generator pulses 1, the number of pulses in which is proportional to the duration fg of the pulse of the one-vibrator 7, and the output

Torah 7.

generator pulses 1, the number of pulses in which is proportional to the sum of the duration d of the time interval and the duration I g of the pulse one-vibration

20

25

thirty

5 40

five

, 50

The number of pulses of this pack is counted by a pulse counter 9 of pulses, where the measurement result is recorded. To determine the duration f, the measured time interval, it is necessary to subtract the known value of the pulse duration d of the one-oscillator 7 from the result recorded in the counter 9 and mils.

The value of the pulse duration iPg of the sampler 7 should be taken to be greater than the maximum possible value of the duration of the interval between adjacent pulses of the input pulse sequence,

From the leading edges of these pulses, the former 4 impulses form-feeds and Ipuls to launch a single vibrator 7, and from the frontal impregnator 5 impulses form them, opening key element 8, whose resistance in the open state is almost zero, the duration of the output impulses of the former 5 pulses, during which the value of the constant time, the time of the master circuit of the one-vibrator 7 becomes close to zero, which allows in this case to ensure the duration of the process of restoring the original one hundred one-shot 7 is less than the duration of the corresponding impulse of the shaper of 5 n-sleeves,

Thus, at the output of the one-shot 7, a sequence of shshuls is formed, consisting of pulses of duration equal to i and the duration of the corresponding 1-ps intervals between adjacent pulses, the input time interval, and one pulse of the one-shot 7 of duration and a.

Claims (1)

Invention Formula A device for measuring time intervals according to aut. St. R 218364, 5 bus device, and the first and second pulse driver and key element, the input of the second pulse driver is connected to the input one so that, in order to improve measurement accuracy, the outputs of the cluster element are connected to the BTopo fy and the third inputs one vibrator.  bus device, and the first and vtonennyh second shaper pulses and the key element, the input of the second pulse shaper is connected to the input bus device, and the first and second outputs of the kklipovogo element connected to the BTopo fy and the third inputs of the single vibrator. Pi62.2 And 2.5