SU1231480A1 - Digital meter of time intervals - Google Patents

Abstract

This invention relates to a measurement technique. The purpose of the invention is to simplify the device. The digital meter contains time selectors 1, counting triggers 2, forming a counting cell, encoder (W) 3, counter 4 pulses, partitioned delay line 6, and generator 7. The output tires 9 of the counter 4 pulses give a result, and on the output bus 10 Ш 3 value specifying the measurement result. The achievement of this goal is promoted by connecting the output of Ш 3 with the counting output of the counter of 4 pulses and connecting the trigger of the dead bit of the counter of 4 pulses of the direct and inverse outputs to the additional inputs of B 3.1 yl. . 0 (LU CAD nU 00

Description

The statement relates to an iOH measuring instrument and can be used to measure time intervals in digital and output devices.

The purpose of the invention is to simplify the device.

The drawing shows a functional diagram of the proposed time interval meter

The device consists of time selectors 1, the outputs of which are connected to the counting inputs of the flip-flops 2, forming the counting cell, the forward and inverse outputs of the indicated flip-flops are connected to the inputs of the encoder 3. The first encoder 3 is connected to the counting input of the counter 4 pulses, straight and the inverse outputs of the low-order trigger of counter 4 are connected to the corresponding 1 inputs of the encoder 3, the second inputs of the time selectors 1 are connected to each other and connected to the input bus 5, the first inputs of the selectors. 1 are connected to the partitioned A delay 6, to the input of which a generator 7 is connected, the installation bus 8 is connected to the installation input to zero of trigger 2 and to the installation inputs zero in the counter code of counter 4, the output tires 9 of counter 4 give the result and the output bus 10 of the encoder 3 value specifying the re; Ultras1T measurement

The device is working as follows.

When the installation pulse is fed through bus 8, counter 4 is indicated by% 1 in the reverse code, in triggers 2 — zeroes, which corresponds to a low potential on the direct outputs of the indicated triggers. This combination excites the zero bus of the encoder 3. After the installation pulse completes, one pulse is compressed into counter 4, which is generated by encoder 3 according to the state of triggers 2, after recording which counter 4 corresponds to zero, that is, zero is written in the forward code.

Bus 5 sends an impulse to the first inputs of the time selectors 1, the duration of which is equal to the measured time interval. The second inputs of selectors 1 come from a sec- ated delay line 6 equal to a series of counting sequences shifted relative to each other in phase

five

"

five

0

pulses. The pulses passing through the time selectors 1 are fed to the counting inputs of the flip-flops 2, which begin to tilt at the rate of arrival of the pulses, and a single pulse is generated at the single outputs of each flip-flop, and at the moment of filling the counting cell is recorded in counter 4. Triggers 2 continue to receive successive impulses from the bus 8, which begin to restore the original value, on the zero outputs of the triggers 2 single signals appear and evom output: encoder unit 3 generated pulse kotorsh and recorded in the counter 4,

The described cycles will be repeated until the end of the pulse on the outset 5. With the termination of the pulse on bus 5, there will be no pulses on the counting inputs of the triggers 2, and the triggers 2 will record the number of pulses received after recording the next counting pulse of the counter 4 until the end of the time interval. The duration of the measured time interval is determined by the formula

t - h

T -11 + 4

t.

 five

0

0

five

where t

T.

-the duration of the measured time interval;

- the period of the following pulses from the generator 7;

  - the amount of shift between adjacent pulses coming from the outputs of the partitioned delay line 6 n - the number of pulses recorded by counter i ;, in - the number of pulses recorded in triggers 2 after the last counting pulse has been formed and the end of the time interval K - the number of parallel circuits

counting equipolar shift pulses.

The number of pulses m is equal to the number of the bus being excited and is determined by the state of the low-order trigger of counter 4, taking into account the number recorded by the triggers 2. If the low-level trigger of counter 4 is in the zero (initial) state, then

3

the number of pulses recorded in triggers 2 is equal to the number of triggers of counter 4 that are in one state, and if the low-trigger trigger of counter 4 is in a single state, then the number of pulses recorded in triggers 2 is equal to the number of triggers of counter 4, being in the zero state.

A decoder for ten inputs and four outputs can be used as the encoder 9.

Formula of invention

Digital time interval meter containing a pulse generator, the output of which is through the sec editor I. Seglik nick Order 2563/51

Compiled by V. Kotov

Tehred L.Oleynik Proofreader M.Samborska

Circulation 398 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

The delay line is connected to the first inputs of the time selectors, the second inputs of which are combined and connected to the input bus of the device, the counting triggers, the counting inputs of each of which are connected to the outputs of the corresponding time selector, the encoder, the inputs of which are connected to the corresponding direct and inverse codes counting triggers and a pulse counter, distinguishing the fact that, in order to simplify, the first output of the encoder is connected to the counting output of the pulse counter, and the trigger of the low-order counter and Direct and inverse outputs are connected to the additional inputs of the encoder.

Claims (1)

The claims 15 A digital time interval meter containing a pulse generator, the output of which through a secured 123 delay line is connected to the first inputs of the time selectors, the second inputs of which are combined and connected to the input bus 5 devices, counting triggers, the counting inputs of each of which are connected to the outputs of the corresponding time selector, an encoder, the inputs of which are connected to the corresponding direct and inverse outputs of the counting triggers and the pulse counter, which differs in that, for the sake of simplification, the first output the encoder is connected to the counting output of the pulse counter, and the low-order trigger of the pulse counter by direct and inverse outputs is connected to the additional inputs of the encoder.