SU419900A1 - DEVICE FOR DETERMINATION OF THE RELATIVE PERIOD OF STAY OF A RANDOM PROCESS IN THE GIVEN INTERVALE - Google Patents

Description

The present invention relates to the field of measuring the basic static characteristics of stationary random processes and can be used in radio communication systems, radiolocation, in the study of automatic control systems, biological systems, acoustic effects and in other areas related to random processes.

Measuring devices are known that allow determining the relative residence time of a random process in a level interval, comprising an input device, two summing devices, two amplitude selectors, two forming devices, two time selectors, a generator of counting pulses and a reversible counter.

However, such meters are complex and do not allow measurement of the residence time of the process under study between two functions of time.

The aim of the invention is to eliminate the above disadvantages.

In the proposed meter, the simplification of the device is achieved by introducing into the circuit two thyristors connected by anodes with a generator of counting pulses, cathodes with a reversible counter, and control electrodes through diodes with summing blocks. This makes it possible to exclude from the known scheme two amplitude selectors, two formuli:, their devices, and two time selectors. Ensuring that the duration of stay of the process under study is measured between two functions of time is achieved by introducing into the scheme of two master functions of these functions of time associated with the summing blocks. FIG. 1 shows a block diagram of the device;

FIG. 2 - time diagrams.

The proposed device consists of an input unit 1, two summing units 2 and 3, two setting units 4 and 5 of time functions, two valves (diodes) 6 and 7, a generator

counting pulses 8, two amplitude selectors, performed on thyristors 9 and 10, and a reversible counter 11.

The diagrams show the random process 12 and 13 under investigation, applied to thyristor control electrodes, thyristor response levels 14 and 15, pulses 16 arriving at one input of a reversible counter, pulses 17, arriving at a reversible counter at another input, and pulses 18,

the corresponding difference in the number of pulses 16 and 17, which determine the output values of the reversible counter. The operation of the proposed device is carried out as follows. Investigated random process K /) through input block 1, representing in general a calibrated attenuator, an emitter follower and, if necessary, an amplifier, is fed to the inputs of two summing blocks 2 and 3, the second inputs of which are fed by setters of 4 and 5 time functions . The setting units 4 and 5 are signal generators that change according to a predetermined law. In the simplest case, when measuring the residence time of a random process under investigation, not between two functions of time, but between two constant levels, they can be calibrated sources of constant voltage.

For ease of reviewing the operation of the entire device, suppose for now that the duration of the process stays between two fixed levels is investigated. Then the setting units 4 and 5 supply to the summing units 2 and 3 the required voltage, which makes it possible to displace the process under study relative to the zero level. Positive emissions of the process under study from the outputs of the blocks pass through diodes 6 and 7 to the control electrodes of thyristors 9 and 10. Diodes 6 and 7 serve to eliminate undesirable negative potentials on the control electrodes.

Thyristors 9 and 10 are in a conducting state only at intervals when the amplitude of positive emissions at the control electrodes exceeds the potential of unlocking the thyristors at the control electrode. Only in these time intervals, single impulses of the geerator of counting pulses 8 pass to the counter 11.

Thus, the number of pulses passing through the thyristor 9 is proportional to the residence time of the process above the level set by setter 4, and the number of impulses that flow through the thyristor 10 is proportional to the duration of the process under study above the level determined by the settingter 5. Reverse counter 11 compares the number impulses arriving at its inputs, and gives indications proportional to the raziostn and, therefore, proportional to the time spent by the process between the two levels specified by by sensors.

From the time diagrams, it can be seen that as a result of different potentials at the outputs of the knobs, the process 12 and 13 under study has a different displacement with respect to the zero level, and consequently, with respect to the thyristor trigger level. The number of pulses 16, passed through one thyristor,

characterizes the residence time of the process 12 above the level 14, and the number of pulses 17 at the output of another thyristor is proportional to the duration of the process 13 staying above the level 15.

Thus, it can be seen that the difference obtained at the output of the counter characterizes the residence time of the process in a given interval. Change the setting potentials of the setters,

It is possible to vary the levels of aerials and the magnitude of the interval between levels within wide limits. If the setting units supply the summing blocks with not null potentials, but the functions of time, which change according to a given law, then the output values of the reversible counter are proportional to the duration of the realization of the process under study between two given functions of time.

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Subject invention

A device for determining the relative residence time of a random process in a slot and an interval containing an input

a block connected to two summing blocks, a generator of counting pulses, a reversible counter, amnlitution selectors and gates, and ananrimer diodes, characterized in that, in order to expand the functionality, amniлитtitude selectors are made on thyristors, the anodes of which are connected to the generator of counting pulses, cathodes - with the corresponding inputs of the reversible counter, and the control electrodes

through diodes connected to the outputs of the summing blocks connected to the outputs of the additionally introduced time function adjusters.

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FIG. 2