SU1462218A2 - Device for recording lightning discharge - Google Patents

Abstract

The invention relates to meteorological instruments designed to determine thunderstorm characteristics. The purpose of the invention is to improve the accuracy of ground lightning detection. The device contains a serially connected antenna and a matching device, to the output of which three frequency selection chains and two time selection chains are connected. The time selection is made according to the pulse duration and the intervals between the lightning pulses. When the specified threshold conditions are met on all: chains, the ground lightning discharge is recorded. 1 il. a 3

Description

WITH

with

one

The invention relates to meteorological instruments designed to obtain the characteristics of a thunderstorm.

The purpose of the invention is to improve the accuracy of ground lightning registrations.

The drawing shows a diagram of the device.

A device for recording lightning discharges contains a serially connected antenna 1. and a matching device 2, the output of which is connected to the inputs of the first 3, second 4 and third 5 filters, as well as to the benefit of the threshold device 6. The output of each of filters 3-5 is connected to the input of the first | 7, the second 8, and the third 9 one-oscillators, respectively, which simultaneously play the role of the threshold device and the spread- ing. pulse width. One-way outputs

Rarators 7, 8 and 9 are connected to respectively. The corresponding inputs of circuit 10 are matches. The output of the threshold device 6 is connected to the inputs of the selector 1.1 pulses in duration and the selector of the time intervals between pulses. The outputs of the selectors 11 and 12 are connected respectively to the inputs of the forming device 13 and the additional forming device 14. The outputs of the forming devices 13 and 14 are connected to the corresponding inputs of the coincidence circuit 10, the output of which is connected to the input of the recording device 15.

The device works as follows.

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The electromagnetic signal generated by lightning 5 is perceived by antenna 1 and through the matching device 2 is fed to the inputs of filters 3-5 of the threshold device 6. As the last 96, a trigger of 111mt is used. When the amplitudes of the pulses at the input of the threshold device 6 exceed a predetermined level, it generates standard amplitude pulses, their duration and the intervals between them are determined by the time for which the amplitude of the input signal exceeds the predetermined threshold

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: At ground-discharge, the amplitudes of the fignals at the outputs of the filters 3,4 and $ are sufficient to make ijiycKa unifibrators 7, 8 and 9, at the output of which there appear pulses of 1 Cj simultaneously; Acting on the corresponding inputs exec; matches 10 „

: The selector 1t analyzes the output fignal from the threshold device b (in short, the series is a series of square lightning impulses) for duration, fyiH ground lightning, this duration is approximately 14-700 C ,. Pos-- .toom ,, if the pulse duration is on. the input of the selector, tt is e: Eadanny1x. A pulse, then, from its code for 1 Gus, is a TZ forming device, which is ONE | tsya to the corresponding input of the circuit-t. tO coincidence allowing signal.

From the output of the threshold device, signal 6 enters., Also to the input of the e.-tector t2, where the time interval between pulses is analyzed, corresponding to the individual code II1Eon.en.-

five

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five

0

five

0

eight.

there are lightning. For ground lightning, these intervals, as a rule, exceed the TO of the ISS. ,,

If the time interval between pulses is greater than the specified one, then the selector T2 is for starting, which is an additional shaping device t which outputs the rag break id and the corresponding input of the coincidence circuit tO.

If, as a result of analyzing an electromagnetic signal from a lightning strike, all the inputs of the circuit 10 have coincidence signals at the same time, then an impulse appears at its output and the recorder will record a ground lightning.

As formers 13 and 14, one-shot was used and the pulse duration at their outputs was chosen to be 1 s.

The use of the analysis of an electromagnetic signal by an additional parameter, namely, the time interval between pulses, provides a higher accuracy in recording ground lightning.

Claims (1)

Formula of inventions A device for registering thunderstorms, spas, s on. f 6560TZ, .. distinguished by the fact that, in order to improve: register accuracy, it is equipped with a series-connected time interval selector and an additional shaping device :, and; the input of the time interval selector is connected to the output of the threshold device, and the output of the additional interface is connected to one of the inputs of the coincidence circuit.