SU1425834A1 - Device for measuring ratio of time intervals - Google Patents

Abstract

The invention relates to computing and measurement technology and can be used in automation devices and in measurement information systems for processing time-pulse information. The purpose of the invention is to expand the scope. A device for measuring the ratio of time intervals contains a meter 1 of time intervals, a delay element 2, an element OR 3, counters 4,5,6 pulses, a register 7, a block 8 of keys and a block 9 of comparison. A positive effect is achieved by introducing - a pulse counter 4 for storing information about the previous measurement interval, in order to obtain a ratio of time intervals following each other. 1 il.

Description

u P1

00 00

The invention relates to computing and digital measuring Nick and can be used in automation devices and measurement information systems for processing time-pulse information.

; The aim of the invention is to expand the scope of application by continuously measuring the ratio of time intervals.

; The drawing shows a functional diagram of a device for measuring the deviation of time intervals.

; The device for measuring the ratio A of time intervals contains the Meter 1 of time intervals, the element 2 of delay, the element 3 IL1, the Counters 4-6 pulses, the register 7, the block 8 of keys and the block 9 of comparison. : The device works as follows.

After starting the device, measure

The time interval 1 begins to measure, in a known manner, the first time interval T1, issuing at its first information output the pulses of a selected exemplary frequency f, the number of which is N51, recorded in counter 5, is proportional to the interval T1, and, and from the second information output of the meter the pulses of the exemplary frequency of fоa are recorded in counter 4 - N41 Tbfoj. Upon the command to end the measurement of the first time interval T1 from the control variable of the meter 1 of the time intervals, the measurement result N41 recorded in the counter 4s sent to the control input of the block 8 of the keys 8 is written to the register 7. The counters 4 and 5 are reset to the initial zero state after time , determined by the latch element 1 and sufficient for confident recording, the result of N41 to the register 7. The measurement of the next, second time interval applied to the input of the meter 1, which occurs in a similar manner with except that in the process of filling ka 5 pulses of the selected model

frequency f

01 S

determining the measurement error, the code of the continuous number of pulses dialed in it is compared with the code of the number recorded in register 7. At the moment of equality of the codes, the comparison block 9 generates a pulse which is reset via the OR 3 counter) to the initial zero state and ; steps at the entrance of the counter 6 result. After that, the filling of the counter 5 continues again from zero to the achievement of equality of codes. The process then repeats.

During the measurement time interval T2, the number K of pulses is generated at the output of the comparison block 9, which indicates how many times the number N41 is contained in the number N52, i.e.

K N52 Ti,:. F o,

N41 T „., Fo.

For any arbitrary pair of time intervals T, and T ,, following each other in the measured sequence of time intervals, the measurement result is N5h Tr, - foi

N4,

t f ti - og

(one)

Expression (1) shows that the output of the result counter 6 produces a number proportional to the ratio of the values of the time interval to the value of the previous time interval in the sequence of consecutively successive time intervals. If we accept T - T ,, -I- Y.Tn,, then expression (1) shows that the number of

... (Tp-, + ifo, /,, j - - - -VI

T (, fci i c. JLlli: l) fs.u,

 rrf

(2)

proportional to the relative change in the values of the time intervals j j, continuously following each other.

Claims (1)

Invention Formula A device for measuring the time interval relations, containing a time interval meter, a delay element, an OR element, the first and second pulse counters j, a code comparison unit, a register and a key block, whose control input is combined with the input of the delay element and connected to the control output a time interval meter, the input of which is an input bus, the output of the delay element is connected to the first input of the I, UM element, the output of which is 3 14258344 pogo connected to the installation input of the input element 1ShK and connected the first pulse counter, the counting frequency of the comparison unit, of which the input is connected to the first inch, with the aim of formational output time meter. GU, -L1Reni application area due to intervals, and the outputs of the connection are: 1,; With the corresponding first entry-time intervals, it is entered the comparison unit, the second input pulse counter, the outputs of which are connected to the corresponding ones, are connected to the corresponding mi register outputs, the inputs of which are JQ information inputs of the key block, connected to the corresponding output-set input connected to the output The keys of the key block, the outputs of the second counting element of the delay, and the counting input of the pulses are the output IC, with the second information output, and the counting input is combined with the second time interval.