SU1287191A1 - Device for calculating ratio of time intervals - Google Patents

Abstract

This invention relates to automatics and computing. The purpose of the invention is to increase the speed and the expansion of the field of application due to the processing of frequency-pulse and code signals. The device for calculating the ratio of time intervals contains a code comparison circuit 1, a counter of 2, 3, 17 and 24 counters, six elements 5-7, 14, 19, 26, five IL 11 elements,

Description

(L

WITH

(pU9.f

ND

00

CP

1287

16, 21, 27 and 30, element OR-NOT 15, one-shot 22, delay element 23, element NOT 25, group AND 28 elements and counts: 29 results. Expansion of the field of application is provided by the implementation of the following modes of operation: division of time intervals TI and T coming to inputs 9, 10 of the device, division of the number of pulses Fj, Fg that are statistically non-uniformly distributed in time and

one

The invention relates to automation and computer technology and can be used, in particular, in information-measuring complexes and devices for processing information presented during the pulse form, as well as in the form of codes or irregularly distributed in time sequences of pulses.

The purpose of the invention is to increase the speed and the expansion of the domain by processing the frequency, pulse, and code signals.

 Fig. 1 shows a block diagram of an apparatus for calculating the ratio of time intervals; figure 2 is a diagram of the counter result; figure 3-8 - timing charts of the device.

The device (figure 1) contains the scheme

1 comparison of codes, first and second counters 2 and 3, generator 4 pulses, first, second and third elements AND 5, .6 and 7, trigger 8, first and second time pulse information inputs 9 and 10 of the device, first element OR 11, the first frequency-pulse information input 12 of the device, the input 13 of the measurement interval of the device, the fourth element AND 14, the element OR-NOT 15, the second element OR 16, the third counter 17, the first code information input 18 of the device, the five element AND 19, the device startup input 20, the third element OR 21, the one-shot 22, the element 23 draws LCD, fourth counter 24, NOT 25 elements, sixth element And 26, quarters

arriving at the inputs 12, 32 during the measurement time, dividing the codes arriving at the inputs 18, 31 of the device, dividing the time interval T by the number of pulses 1 and dividing the number of pulses F by the time interval. The increase in speed is achieved 3, and by eliminating the need to fill the counter with 2 pulses of a lower frequency when calculating the fractional part of the ratio. 1 hp f-ly, 8 ill.

the element OR 27, the group of 28 elements And, the counter 29 of the result, the fifth element OR 30, the second code 31 and the second frequency-pulse 32 information inputs of the device.

The result counter 29 (FIG. 2) contains the counter 33 of the integer part of the result, the element OR 34, and a group of 35 decades of the fractional part of the result.

Scheme 1 of code comparison can be performed on K564IP2 microcircuits. Counters 2, 3, 17 can be executed on chips K564IE14. Counters 24 can be implemented with a built-in binary code decoder into a positional code, for example, on a K564IE9 chip.

In FIGS. 3 and 4, the following time diagram notation is taken: a is the signal at the input 10 of the device; b - the signal at the input 9 of the device; in the signal at the input 13 of the device; g - signal at the output of the element OR 27; d - signal at the output of the element OR 16

 e is the output of the code comparison circuit 1; W is the signal at the output of the single-vibrator 22; 3 - the signal at the output of the trigger 8; and - the signal at the output of the element And 5,

In Figures 5 and 6, the following time diagram notations are adopted; and - a signal on an entrance 32 of the device; b - the signal at the input 12 of the device. The signal plots in c, d, d, e, f, g, and are taken from the same elements as in Fig. 3.

3-12

In Fig. 7, the following time diagram notation is accepted: a -, the signal at the input 12 of the device, b - the signal at the input 10 of the device. The signal plots in c, d, d, e, g, s, are taken from the same elements as in Figs. 3 and 4.

In Fig. 8, the following symbols are accepted: a is the signal at the input 9 of the device; b - signal at the input 32 of the device. The signal plots in c, d, d, e, g, 3, and are taken from the same elements as in Figures 3-5.

The device operates in several modes, the division of time intervals T and T „, arriving at inputs 9 and 10 of the device, dividing the number of pulses P, F, which are statistically unevenly distributed in time arriving at inputs 12 and 32 during the measurement time T, the division of codes located at the inputs 18 and 31 of the device, the division of the time interval Tj by the number FJ of pulses of an uneven sequence and the division of the number Y of pulses of an uneven sequence by the time interval T.

Measurement of the ratio of time intervals Tj and T (TI Ti).

At the beginning of the measurement, the counters 2, 3, 17, 24, 29 and the trigger 8 are set to the state O, with the counter 24 made with the built-in decoder connecting the output of the code comparison circuit 1 to the input of the counter 33 of the whole, part result (figure 1 and 2). The time interval T comes to the input of device Yu, and the time interval Tj to input 9. Elements 6, 7 and 7 open-. c, and the pulses from the generator 5 begin to flow to the inputs of counters 2 and 3, the contents of which linearly increase. At the output of the code comparison circuit, there is a zero potential, since the gate input of the code comparison circuit is blocked by a logical O from the output of the OR-HE 15 element (Fig. 3d, e). At the moment when the interval Tj ends, the code comparison circuit is unblocked and potential 1 appears at the output, which, through element OR 21, resets counter 2 to O, while the equality of the codes at the inputs of circuit 1 is comparable. neither of the codes is violated and at the output of the code comparison circuit again a zero potential is established; The impulse of the note thus formed914

in the counter 33 of the integer part of the result (FIG. 3, g). This means that one interval TJ is laid in interval T. The contents of counter 2 continue to increase linearly until the code in it is compared with the code N (Tj) (where FQ is the frequency of the generator 4) stored in the counter 3, At this point, the output of circuit 1 Potential 1, which sets counter 2 to O. At the output of the code comparison circuit, the zero potential appears at the moment of zeroing of the counter 2, since the equality of the codes at the inputs of circuit 1 of the code comparison is violated.

Formed in this way the pulse is fed to the input of the counter 33 of the whole, part of the result. This means that the interval T, etc., is placed in interval 1 again. At the moment when the interval T ends at the output of the element OR 11, a potential difference of 1-0 occurs and the one-shot 22 generates a pulse, which translates the device to the calculation of the fractional part of the ratio (Fig. 3 g). This impulse translates counter 24 into the next state and the output of the code comparison circuit is connected to the input of the decade by the tenth fraction of the result of a group of 35 decades, records the code remaining after the previous measurement in counter 2, and finally with some the delay set by the delay element 25 resets the counter 2 and sets the trigger 8 to the state 1. The counter 2 outputs are connected to the counter 17 inputs so that the first tetrad of the counter 2 outputs is connected to the second tetrad of the counter 17 inputs, the second tetrad in move counter 2 is connected to the third input tetrad counter 17 etc., and the first nibble counter 17 inputs connected to logical O device.

Such a rewrite organization allows to obtain in the counter 17 a residual code multiplied by 16 or 10, depending on whether the binary or binary-decimal counters are used in the device,

At the moment of setting the trigger 8 in 1, the element And 5 opens and the inputs of the counters 17 and 2 start to receive impulses from the generator. The contents of the counter 2 begin linearly on 512

grow and at the moment of coincidence of its code with the code Tj, an impulse is formed at the output of the code comparison circuit, which is recorded in a decade of the tenth Beat of the result. The process of measuring the tenth part of the result continues until the contents of the counter 17, performed by the subtracter, become equal to O. At this point, a difference 1 - O occurs at the output of the overflow of the counter 17.

The single-oscillator 22 generates a pulse that takes the device to the next measurement cycle, i.e. measuring hundredths of the result. This pulse records the residual code with multiplication by 10 into counter 17. Counter 24 connects the output of the code comparison circuit to the input of a decade of hundredths of the result of a group of 35 decades, and with a delay in the discharge of counter 2. The measurement continues until the potential from the output of the higher one the discharge of counter 24 does not reset trigger 8 to O. At this point, the measurement ends and the result of measurements is provided in result counter 29. If, during the measurement, zero is recorded in the counter 17, i.e. The previous measurement took place without remainder, then at the output of the overflow of the counter 17 there is a zero potential, the element NOT 25 opens the element I 14 and the delayed pulse from the output of the element 23 delay resets the trigger 8 into O

Measurement of the ratio of time intervals when TJ T Т (Fig. 4a, b).

At the outputs 9 and 10 of the device, the time intervals Tr and Tj come, the elements 6 and 7 open, and the pulses from the generator 4 begin to flow to the inputs of counters 2 and 3 (Fig. 4d, g). The contents of counters 2 and 3 linearly increase, at the output of the code comparison circuit 1, there is a zero potential, since the gate input is blocked by a zero potential from the output of the NL-HE 15 element (Fig. 4e). At the moment when the TJ interval ends, the code comparison circuit 1 is unblocked, and a 1–0 drop occurs at the output of OR 11, and the one-shot 22 produces a pulse. This pulse enters the code N (T) FO l, (where FQ is the oscillator frequency 4), multiplied by 10, into the counter 17, transfers the counter 24 to the next state, thereby connecting the output of the code comparison circuit to the tenth decade input to1 6

lei of the result of the counter 29, and with some delay set by the delay element 22, resetting the counter 2 and setting trigger 1 to 8 (FIG. 4h). Element I 5 opens, and the pulses from generator 4 begin to flow to the inputs of counters 2 and 17. The contents of counter 2 increase linearly and at the time its code coincides with counter code 3, it is reset. At the output of the code comparison circuit, a pulse is formed, which is recorded in ten decades of the tenth part of the result of counter 29. Counter 2 continues to fill and at the moment of the next match its code with code N (Tj) is reset.

At the output of the code comparison circuit, an impulse is formed, which is also registered in the counter 29. The calculation continues until the contents of the counter 17 become equal to O. At this moment, the rewriting with the multiplication by 10 of the residual code occurs and the device proceeds to the calculation of hundredths share result, etc.

Measurement of the ratio of numbers, statistically non-uniformly distributed in time, sequences of pulses arriving at the inputs of the device during the measurement (Fig. 5, Fig. 6).

At the beginning of the measurement, the counters 2, 3, 17, 24 and trigger 8 are in the state O. The inputs 32 and 12 receive statically non-uniformly distributed pulse sequences FJ, b. The measurements begin at the moment of arrival of the measurement pulse T at the input 13 of the device, the comparison circuit codes is blocked by a zero potential at the output of the SHSh-HE 15 element, and And 19 and 26 are opened and the pulses FJ, F2 of non-uniform sequences begin to flow into counters 2 and 3 (Fig. 5a, b). At the moment when the THJM interval ends, the counters contain the code N (F) and N (F) of the number of pulses that arrived during the measurement time at the inputs of the device, and a potential difference of 1-0 is formed at the output of the OR 11 element. The single-oscillator 22 generates a pulse, which writes the N code (F ") multiplied by 10 to the counter 17, sets the trigger 8 to state 1 and transfers the count-24 to the next state, i.e. connects the output of the code comparison circuit to the input of a decade of the tenth part of the result. (Fig.5e, g). If N (F-) N (F (Fig. 5a, b), then every tenth pulse from the output of the highest decade of the 35-decade group goes through the OR 34 element to the counter 33, therefore in the result counter 29 by the end of the first measurement cycle the result will be dividing both the integer part of the ratio and its tenth part. If N (F.) H (Fj) (Fig. 6a, b), then at the end of the first measurement cycle in the result counter 29 there is only a tenth part of the result. the device is similar to the indicated one. Measurement of the ratio of codes. At the beginning of the measurement, all the counters and the trigger are set to O, and at the inputs 18 and 31 devices are codes that need to be divided, Calculations begin, at the moment of pulse arrival, the device starts at the device input 20. This impulse causes the codes located at inputs 18, 31 of the device to be written to counters 2 and 3. At the output of the OR 11 element, a potential drop of 1-0 occurs, and the one-wave; rator 22 forms a pulse that records information from counter 2 to counter 17, sets trigger 8, resets counter 2, etc. Further operation of the device is similar.

Measuring the ratio of the number of pulses of a non-uniform sequence 2 to the time interval Tj (Fig. 1, 2.7).

In this mode, the pulse Fg of an irregular sequence arrives at the input 12 of the device, the time interval T, to the input 10, and the interval T to the input 13 is ,,, | . The latter opens the element And 19, and the pulses of an uneven sequence Eg begin to flow to the input of counter 2. Interval. T; opens the element And 7, and the generator 3 begins to arrive at the counter 3, the element OR NOT 15 blocks the code comparison circuit 1. At the time of the end of the interval Tj ,, |, from the differential 1–0 from the output of the element OR 11, the one-shot 22 forms a pulse that writes to counter 17, sets the trigger 8 to 1, resets counter 2, and so on. device similar to that.

The device operates in the same way in the measurement mode of the ratio of the time interval T to the number of pulses of non-uniform sequence Fj (Fig. 8a, b).

Claims (2)

Invention Formula one . A device for calculating the ratio of time intervals, containing a result counter, a pulse generator, the output of which is connected to the first inputs of the first, second and third elements AND, the element NOT connected by output to the first input of the fourth element AND, a code comparison circuit connected by the first and second inputs with outputs of the first and second counters, and a one-shot, the output of which is connected to the control input of the installation of the code of the third counter, connected by the installation input of the higher bits with the output of the first counter a, and the counting input - with the output of the first element And connected by the second input to the trigger output, the second inputs of the second and third elements And connected to the first and second time respectively by pulses of the information inputs of the device, characterized in that and expanding the field of application by processing the frequency-pulse and code signals, the fourth counter, the fifth and sixth AND elements, the AND element group, the delay element, the five OR elements, and the OR – NOT element connected the output to the gate input of the code comparison circuit, the first input to the device start input, control inputs for setting the codes of the first and second counters and the first input of the first OR element, the second input to the second input of the third AND element, and the third input to the measurement interval input device, the second input of the first element of the IPD and the first inputs of the fifth and sixth elements And, the second inputs of which are connected respectively to the first and second pulse-frequency information inputs of the device, and the output of the fifth lementa and connected to the first input of the second OR element connected to the other inputs to the outputs of the first and second AND gates, and output - with a counting input of the first counter, adjusting input of which is connected to the first code information input of the device, and the zeroing input - with the output of the third OR element connected by the first input to the output of the delay element, the counting trigger input and the second input of the fourth AND element, and the second input - to the output of the code comparison circuit and the first inputs of the AND group elements, connected to the second inputs with the outputs of the fourth counter, and outputs with the corresponding inputs of the result counter, the output of the sixth AND element connected to the first input of the fourth OR element connected by the second input to the the output of the third element And the output - with the counting input of the second counter, the installation input of which is connected to the second code information:: the device's input, and the installation input of the lower tetrad of the bits of the third counter is connected to the device bus zero and the overflow output of the third counter is connected to the input element and NOT (pus, 2 five 0 five to the third input of the first element. OR, the fourth and fifth inputs are connected to the first and second time by the pulse information inputs of the device, and the output is to the input of a single-oscillator connected by the output to the input of the delay element and the counting | Input of the fourth counter, the high-voltage output of which is connected to the first the input of the fifth element OR, connected by the second input to the output of the fourth element AND, and the output to the input of zeroing trigger. 2. Device pop.1, which differs from the fact that the result counter contains the counter of the integer part of the result, the OR element and the group of decades (the fractional part of the result, the output of the higher decade is connected to the first input of the OR element connected by the output to the count input a counter of the integer part of the result, with the second input of the OR element and the inputs of the decade of the fractional part of the result being the corresponding inputs of the result. ( Sh..d i one Fi.I