SU454558A1 - Device for integrating the production of two random signals - Google Patents

Description

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The invention also relates to a specialty: your digital computing device and is designed to determine the integral produced and two cases (Noh signals, one of which is proportional to the frequency ii (t) of the pulse, and the other - the frequency period / 2 (0- Tak the problem often arises when measuring the integral | Vel: imich, for example, p, p; and measuring the mass of the product being pumped to any pipeline during time T, in the case where the volume flow rate of the product is proportional to the frequency fi (t) and density riipo1 duct pro rational

I 2 (y

There are well-known devices for solving the problem in which (each pulse with frequency f (t) gives a signal to transform

period equal to digital code, ko / 2 ()

The second is sent to the counter where the corresponding code is accumulated.

However, these devices require large hardware expenditures on the period conversion, the IB signal's digital code: and a large volume of meters during long-term integration.

The proposed device is based on the use of logical operations, "and multiplication; and integration according to the method of statistical tests, based on randomness

multiplied and integrable signals. Which way is solved. And the task leads to a significant simplification of the equipment as compared with the known devices.

To multiply and integrate the second signal, which is proportional to ne, the period, is converted into a sequence of pulses, and the duty cycle of this sequence is 1 1 pro1. 0.5,

portioned lyoo .- / k, -TO

/ 2 () / 2 ()

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3f, W

Such a transformation is achieved with the help of some logic, which consists in the following. A period of knots, which is equal to, is determined.

tt1

signal II and -tt, -

/ 2 (O-.pp:

1. Zapresh, asths drop in the oior period of all the pulses of signal II, except the first; at the same time, it should be assumed that the impulse fell out 1B to the supporting hyperpod, if at least one of its frots enters this period.

2. Recalculation and fixation of the first IB reference is detected (the period named after the pulse of the signal II by the reference impulse.

3. An empty reference period is detected and f) is fixed, i.e., one in which no one fell out of: 1 pulsed signal II. After

11 re | unzipped, -in correspondences :; t described by the current logic of signal II, the coincidence of the transformed signal with the signal I proportional to fi (t) is checked. this coincidence does not occur, then on; The bogus counter is sent:

2, a. One impulse in the event that “the signal’s miuls of II is not an intercourse; the reference pulse is a pulse, and the previous reference period was not empty;

2.6. Two 1-impulses, impulse of -signal II hrechrekals with reference impulse, and - previous reference ne: p: iodine was not empty.m or if the impulse of signal P did not intersect with the reference impulse and the previous reference period was empty;

2, c. Three impulses, if the impulse oigpal II intersected with the reference pulse, pulse M, and the previous reference period was empty.

In the first case (FROM the decree cases, the ratio of the pulse of the pre-emissive signal II: to о.: Yurno: the period is proportional to the relative magnitude of the signal II, in the BToipoM this ratio is 0.5, in the third - 1/3.

Since the coincidence of the pulses of signal II / of signal I is a random event (since the frequencies of optals I and II are random and; incorrect), the probability is equal to the ratio of the duration of 1 impulses of signal II to the sum of the duration of the pulses of signal II and the pause between these pulses, the content of the output counter is an estimate of the magnitude

ddt

/, (0

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The error in estimating the proportional width of the pulse of the I signal is inversely proportional to the root and quadratic from the H-Isla coincidence checks.

The drawing shows the proposed device.

It contains triggers / -4, circuits AND 5-8, circuits NOT-AND 9 and 10, inverter //, differential tsyguchki 12-14, counter 15, generator 16 reference imiulsov and one vibrator 17.

The nerve point of logic is realized with the help of the following logic elements: trigger 1, circuit AND 5, NOT-AND 9, 10 AND geneToip 16.

Consider the points of this part of the scheme., We.

Silial II attacked in the reference period completely, then at the input to the circuit AND 5 before the signal pulse P arrives, it has a resolution from trigger 1, which is prepared by an impulse pulse. In this case, the output of the e-circuit And 5 is also 1 RESOLUTION from the output of the circuit NOT-AND 10, since IB is the case at the input with- “O, and the output of the circuit is NOT-E 9 -“ O. The incoming pulse of signal II passes through the open Huge AND 5. At the same time, the C1 signal on your approach of the NOT-10 circuit does not change, as well:

NP-I 9 exit - "O. The trigger / tilts from a predetermined edge of the signal P, clears circuit II 5 before the arrival of the next reference pulse. In case the reference

the period hit the second pulse of signal II, circuit 5 is closed by trigger 2, since it is tilted by the falling edge of the previous pulse of signal II. In this case, the output of the circuit is not AND 9 - “I.

When a pulse of signal II is received from the output of the NOT-AND circuit W, the prohibition is applied to the AND 5 circuit, which is not removed until the signal pulse II terminates, as received;: 1, and the trigger / reference pulse signal at the output of NON-I, as before, “1, because at its entrance to -“ O.

At the output of the circuit And 5 we get -the sequence of pulses of signal II, corresponding to the first paragraph of logic. The second part of the circuit should detect the contact of the pulses of signals I and II and at the same time execute the second point of the logic.

Consider the operation of the scheme in the listed

cases x

1. The pulse of the sigpal I co. B1pal with the impulse of signal II, with which the reference pulse did not intersect, and the preceding reference period was not letgm. At this moment, the pmpulse of signal II is fed to the trigger reset bus 2-4.

PM: signal pulses II are negative polarity, therefore for the duration of their duration the triggers 2-4 are prepared. EU.Shi im.pulse

the signal I will arrive in the pulse duration of the signal P, the trigger 5 is transferred to the state "I, npiH" at the output of the differential: Tsipl1l-th chain 12 a pulse of positive polarity will be generated, which will

1 to the counter 15 input. At the end of the emulsion C1: drive II, trigger 3 returns to its original position, and triggers 2 and 4 of their state do not change, as trigger 2 is thrown when the reference pulse coincides with the signal pulse II (in. there was no coincidence in this case), and the trigger 4 is moved in the presence of the preceding empty 01 period (which was also missing in the first case considered by us).

2. The impulse of signal I coincided with the impulse of signal II, while the reference impulse intersected with the impulse of signal II, and the previous reference period was not empty, in this case the circuit works similarly, with the only difference that during the duration of the impulse Signal II receives not only the impulse of signal I, which flips trigger 3, but also O.: an impulse, which flips T1rigger 2. At ET01M, the output of circuit is And 7

a negative potential appears. At the end of the pulse of the signal II of the trigger 2 and turn over into the initial state, while the potential at the output of the circuit AND 7 becomes zero, as a result of which the output

differential chain 13 form | ruets

positive N.shulg, which goes to the counter 15. It is obvious that in this case two impulses are sent to the counter.

If the impulse of signal I coincides with the impulse of signal II, the impulse of signal P does not intersect with the opuli impulse and the preceding lane: iodine was empty, then the absence of the impulse of signal II in the reference period is fixed, by flinging the trigger 4 to the state "1.

This is done as follows. The first support impulse transfers the trigger} to the position “I, thus preparing the scheme AND 6. If during the time of the reference signal the signal signal had been received, it prohibits the output from the scheme 6, but if there were no signal pulses between the two reference pulses II, then the next reference impulse arriving at the input And 6, according to the Wits at the output of the circuit And 6 and the trigger 4 is transferred. If the signal signal's II pulse of the whole 1P01 is set in the oio.p1 period, then the flip-flop 1 thrown by the front will disable the output from the AND 6 circuit and the next reference pulse and the pulse will not arrive on the 1-trigger input. When a pulse of a signal coincides with a pulse, a signal; and a second, similarly to the previously observed case, a pulse arrives immediately at counter 15. Since in this case both the trigger 3 and the trigger 4 are in the position "I", the output potential of the circuit And 8 has a negative potential. At the end of the pulse of signal II, the triggers of Zn4 return to the initial state, while at the output of the circuit AND 8. There is a zero potential, and at the output of the differential chain 14 there is a pulse, behind the start of the one-shot which is triggered by the counter 15.

3. The P. pulse of signal II coincided with the pulse of signal I and the reference pulse, and the previous reference period is empty. In this case, the operation of the circuit is different about r described. Only in addition to the triggers in 3 and 4, the trigger and trigger 2 are also triggered (if c fits into the reference and Mulcura

with lm.pulse signal II). Upon termination and pulse of signal II at the outputs of differential circuits J3. And 14, impulses are output to counter 15. To avoid coinciding IBO time of output pulses, the differential circuit 14 fills with a single vibrator 7, which produces an impulse, from the falling edge and. pulses

which counter counters / e.

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Subject invention

A device for integrating a product of two random signals containing a generator of pulses connected to a single input of the first trigger and one of the inputs of the first circuit AND, the second, third, fourth triggers, the single outputs of which are connected respectively to two inputs of the second and

the third schemes P; a counter whose input is connected to the first and second differentiating chains and to a single-oscillator connected to a third differential chain, characterized in that it contains the first and the second NOT-AND schemes, the fourth AND circuit, and the inverter, moreover, the device input is connected to one of the inputs of the fourth circuit I and the second circuit NOT-AND, the output of the latter is connected to the input of the first circuit NO-P and one of the inputs of the fourth circuit H, the output of which is connected (To the inverter through the data terminals to the inputs of the second schemes P and to one of the input in the third circuit And to the zero inputs of the fourth and aiepvogo trigger connected by a single output to the first and fourth circuits P and to the first circuit NOT-H connected to one of the inputs to the second circuit NOT-li, the second input of the device is connected to a single input of the third trigger, the zero output of which is connected to the second differentiating chain, the inputs of the first and third diverging chains are connected respectively to the outputs of the second P of the third circuits P.

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