SU1416972A1 - Device for determining distribution of probability ratings of pulsed signals - Google Patents

Description

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The invention relates to specialized computer aids for measuring the statistical characteristics of random processes, and can be used in the study of disturbances of the Earth’s electromagnetic field caused by lightning discharges.

The purpose of the invention is to expand the functionality of the device by determining the distribution of the number of components in a separate or. in a few random processes.

The drawing shows a block diagram of the device

The device contains serially connected sensor 1 random signals, element 2, delay unit 3, counter 4, digital-to-analog converter 5, pulse-amplitude modulator 6, amplitude analyzer 7, and also start-up pulse shaping unit 8 and pulse shaper 9, output which is connected to the zeroing input of the counter 4 and the control input of the modulator 6. The input of the starting pulse shaping unit 8 is connected to the output of the sensor 1 of random signals, and the output to the first input of the And 2 element

The device works as follows.

The pulse signal from the output of sensor 1 is simultaneously applied to the input of block 8 and to the second input of element II 2. When the input signal exceeds a pre-selected threshold level, a square pulse appears at the output of block B, which can be used as a one-shot, equal to the total duration of the studied multicomponent lightning signal (1.5 s). The impulse from the output of block 8 is fed to the first input of the element AND 2. This allows all pulsed signals, each of which corresponds to a separate lightning component, to pass from the output of sensor 1 to the input of block 3 delays. When the value of the input signal, which enters the input of the delay unit 3 and the corresponding separated lightning component, exceeds the pre-selected threshold level at the output of unit 3, which can be used as one-time

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A rator appears, a rectangular pulse equal to the total duration of one lightning component (5 ms). Moreover, the trigger threshold of delay unit 3 should be chosen slightly lower than the trigger threshold of trigger generation unit 8 in order for signals from all lightning components to trigger delay block 3, since, as a rule, signals from subsequent lightning components are lower in amplitude than first component.

The number of pulses produced during lightning by block 3, each of which corresponds to its individual component, is counted by counter 4. As a result, an analog signal appears at the output of converter 5, whose magnitude is proportional to the number of components that occurred in the lightning. This signal is fed to the information input of the modulator 6.

At the end of the time allotted for analyzing the number of components of a separate lightning (1.5 s), the pulse at unit 8 ends and element 2 is closed at the first entrance. . The back of the pulse generated by the unit 8 starts the pulse shaper 9, which produces a normalizing pulse, which arrives at the control input of the modulator 6. At the same time, the input of the modulator is 6 s. The output of converter 5 is supplied with a constant voltage, the value of which is proportional to the number of components occurring in a given lightning. Thus, at the output of the modulator 6 a normalized pulse appears with an amplitude proportional to the number of components in the lightning under study. This pulse is recorded in the corresponding channel of the multichannel analyzer 7. The trailing edge of the pulse produced by shaper 9, the counter 4 (pulses) returns to its original position (zeroed).

The analysis of the number of components in each subsequent field is similar. At the end of the process of measuring, the number of pulses in each channel of the analyzer 7 turns out to be a reference probability of the appearance of a corresponding number of lightning components. For example, in the first channel - one-component lightning m, during

the second channel is two-component, etc.

Thus, the proposed device provides the possibility of obtaining the distribution of the amounts of lightning components in a thunderstorm. The information obtained with the help of the instrument is necessary for understanding the physical processes occurring in the cloud during a thunderstorm, and can be used to perform detailed calculations of the lightning protection of the most important objects of the national economy.

Claims (1)

DEVICE FOR DETERMINING PROBABILITY DISTRIBUTIONS OF PULSE SIGNALS PARAMETERS, containing an amplitude-pulse modulator, the output of which is connected to the input of the amplitude analyzer, and the control input is connected to the output of the pulse shaper, a counter, the counting input of which is connected to the delay output, the random signal sensor, the output of which is connected to the input of the triggering pulse generating unit, characterized in that, in order to expand the functionality by determining the distributions of the number of components in Taken separately or in several random processes, it contains an AND element and a digital-to-analog converter, the output of which is connected to the information input of the pulse-amplitude modulator, and the input of the digital-to-analog converter with the output of the counter, the zeroing input of which is connected to the output of the pulse shaper, the input of which is combined with the first input the And element is connected to the output of the start pulse generation block, the second input of the And element is connected to the output of the random signal sensor, and the output of the And element is connected to the input of the an eye of delay. in the case of random structures