SU1524008A1 - Device for determining extremum moments - Google Patents

Abstract

This invention relates to electrical measuring technology. The purpose of the invention is to increase the speed of determining the moments of extremes. To do this, an element OR 9, a D-flip-flop 12 and an And 13-element are introduced into the device. The device also contains a generator 1, a counting trigger 2, a distributor of 3 pulses, an RS-trigger 4, elements And 5, 8, 11, a stabilizer 6, a driver 7 , a reversible counter 10. To determine the duration of the cutoff region, only the first input pulse is used, and hereinafter the pulses determining the extremes correspond to each subsequent input pulse. In this case, the time required for determining the moments of the extremes of the pulses is halved. 1 il.

Description

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The invention relates to electrical measuring equipment and can be used in devices} to determine the moments of extremes.

The purpose of the invention is to increase the speed of determining the moments of extremes.

The drawing shows a diagram of the device for determining the moments of extremes.

The device contains a generator 1, the counting trigger 2, the distributor 3 pulses, RS-trigger 4, the first element And 5, the stabilizer 6, the driver 7, the second element And 8, element ИШ1 9, reversible counter 1П, the third element And 11, P-trigger 12, the fourth element AND 13, B.1X (the building of which, together with the outputs of the elements 5 and 8, through the element OR 9 is connected to the counting input of the counter 10, the transfer output of which is connected to the first input of the third element 11 and the control input to the inverse output D -trigger 12 and the first input of the fourth element And 13, the second input of which about together with the first inputs of the first and second elements And 5 and 8 are connected to the output of the imager 7, the input of which is connected to the first output of the stabilizer, the second input together with the second input of the element 8 and 8 to the output of the generator 1 and the input of the counting trigger 2, the fourth input - To the inverse output of the RS flip-flop 4, the R- and S-inputs of which are connected to the S- and C-inputs of the D-flip-flop 12, respectively, and the outputs distributed 3 pulses, and the direct output podkln) 4 to the second input element And 5 , the third input of which is connected to the output of the counting trigger 2, the second output stabilizer coupled to a second input of AND II, whose output is connected to the device output and the R-input of D-flip-flop 12, D-input of which is grounded, and a direct output connected to a third input of the AND gate 8.

The device works as follows.

The analyzed sieve, which is fed to the input of the stabilizer 6, is stabilized in amplitude and fed to the input of the former 7. The leading edge of the rectangular pulse at its output corresponds to the signal level, starting from which the signal

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It is believed that a sufficiently high accuracy is symmetrical with respect to the verps.

The first cycle of operation of the device starts at the moment of appearance of the signal stabilized in amplitude at the input of the imager 7. The first (setting) start-impulse arrives at the input of the distributor 3 pulses, whose leading edge corresponds to the moment of appearance of the impulse under study. In the first cycle of the start and myc from the output of the distributor 3 pulses are fed to the S-input trigger 4.

As a result of applying a start-pulse to the S input of trigger 4, the level of a logical unit is established at its direct output. By the same signal, the trigger 12 is set to the zero state.

At the output of the imaging unit 7, before the appearance of the pulse under study, a logic zero level is set, and at the moment when the input signal level reaches a certain cutoff level, a single state is set at the output of the imaging unit 7. This state is maintained until the magnitude of the signal under study becomes less than the cutoff level. At this moment, the zero state is set at the output of the former 7. Thus, in the first cycle of operation, a cutoff level is chosen, which is rather close to the extreme value of the signal under study, and the region in which the extremum of this signal is found is determined.

Since in the first cycle of operation at one of the inputs of the And 8 element there is a logical zero level from the inverse output of the trigger 4, a low level is also generated at the output of this element, since the inputs of the And 5 element receive a single level from the direct output of the trigger 4, the impulse from the generator 7 and the pulses from the output of the counting trigger 2, then the output of the element And 5 transforms a burst of pulses, limited by the duration of the impulse from the generator 7. These pulses, passed through the element OR 9, are summed in the counter 10, since channeling yuschem inlet is present with a high level inverted output of the trigger

12. Element And 13 at this moment is closed low with the inverse output of trigger A.

The number of pulses accumulated after the first clock cycle in the counter determines the duration of the cutoff pulse.

At the end of the cut-off pulse, the reversible counter 10 stops counting the pulses and maintains its state until the second cycle of operation. Moreover, the time interval to the second cycle can be as coal-large as the passage of pulses to the input of the reversible counter 10 is possible only if there is a pulse at the output of the imager 7.

In the second cycle of operation of the device which starts at the moment of the appearance of the second pulse at the output of the driver 7, the R-input of the trigger 4 and the S-input of the trigger 12 receive the second start-pulse from the output of the distributor 3 pulses, translating

that H 13, in addition to the pulses from the generator I, there are high levels from the inverse outputs of the flip-flops 4 and 12 and the second half of the cut-off pulse. Counter 10 sums the pulses arriving at it from the output of the element AND 13 through the element OR 9, since its control input is present

high level with inverse trigger output 12,

Since the frequency of filling the counter is the same as in the second cycle, after the end of the cutoff pulse, the same number of pulses is restored in the counter 10 as after the first cycle.

In the further work, the distributor of 3 pulses gives only start-impulses about the beginning of the second cycle, setting trigger 12 to one state, since in the first cycle it is not necessary. To update the value of the area you

the trigger 4 is in the zero state, and the trigger-25 is given a start-pulse of the first cycle.

Ger 12 - in the unit. In the second cycle, when the pulse from the driver 7 is generated, the pulses from the generator 1 pass through the elements AND 8, OR 9 to the input of the counter 10, which in this cycle works for subtraction, since its control input contains a low level from the inverse output Trigger 12, which also blocks the element And 13. Since the pulses from the generator 1 arrive at a frequency 2 times greater than the counting trigger 2, then in the middle of the area the counter will be reset. The impulse corresponding to the moment of the reversible counter's passage through zero is fed to the input of the element 11, the second input of which is impulse from the stabilizer 6, whose temporary position corresponds to the moment when the stabilization of the signal under investigation has stabilized. This eliminates the possibility of the occurrence of a false extremum signal, which may occur at the moment when the amplitude of the signal under investigation has not yet been given to the stabilization curve. The pulse, which determines the position of the extremum, arrives at the output of the device and the R input of the trigger 12. In the third cycle of operation of the device, after switching the trigger 12, conditions are created for the passage of pulses from the generator 1 to the input of the counter 10, i.e. at the inputs of elements

and the cycle repeats again.

Thus, to determine the duration of the cut-off area, only the first input pulse is used, and in the long run the pulses that determine the extremes and appearing at the output of the And 11 element correspond to each successive; to it the input pulse, rather than one, as in the well-known device. In this case, the time required to determine the moments of the extremes of the pulses is reduced on average by a factor of two.

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Claims (1)

The invention The device for determining the moments of extremes, containing the driver, the first, second and third elements And, RS-trigger, counting xc trigger, generator, reversible the counter, pulse distributor and stabilizer whose input is the device input, the first output through the driver is connected to Q first inputs of the first and second elements AND, the second inputs of which are connected to the output of the generator and directly to the first element And it is connected to the direct output of the RS flip-flop, the inputs of which are connected to the outputs of the pulse distributor, the input of which is the start input of the device, while five 7 152OPD88 the second output stabilizer pluggable elements And. the first and second to the first input of the third element inputs of the fourth element AND the connection; the second input of which is connected respectively to the outputs form the output of the overflow of the counter, armarator and generator, the third input output is the device output, to the inverse output of the RS flip-flop, and characterized in that, the fourth to the control input is aimed at increasing the speed of the version counter and the inverse determine the extremum moments, the D-flip-flop output, the D-flip-flop entered it directly, the fourth one, the Q of which is connected to T1) by the network input The element AND and the element OR, the output of the second element And, 5 and C inputs are connected to the counting input of the R-and S-inputs of the RS flip-flop of the corresponding counter, and the inputs are respectively, R-input - with the output to alarm outputs the first, second, and fourth element of the AND, and the D input is grounded.