SU1509787A1 - Apparatus for recording the lightning activities - Google Patents

Abstract

The invention relates to devices for measuring parameters of meteorological phenomena, in particular, for automatically determining the duration of thunderstorm activities. The purpose of the invention is to improve the accuracy of recording the duration of a thunderstorm at several levels of its intensity. The device senses electromagnetic lightning signals, which are generated in the form of 1-second pulses. The durations of the time intervals between these pulses or lightning are measured. If the time interval between lightning is 0–20 s, then this characterizes a thunderstorm of strong intensity, 21–60 s — a thunderstorm of medium intensity, 61–300 s — a threat of weak intensity. Information about the duration of a thunderstorm activity of a certain intensity is accumulated in the corresponding adder and displayed on the indicator. 1 il.

Description

The invention relates to meteorological instruments and can be used on a network of weather stations to obtain information about the duration of thunderstorm activity.

The purpose of the invention is to increase the accuracy of recording the duration of thunderstorm activity at several levels of its intensity.

The drawing shows a block diagram of a device for registering thunderstorm activity.

A device for recording lightning activity contains serially connected antenna 1, unit 2 of section, one-shot 3, counter 4, and decoder 5. To the corresponding outputs of decoder 5 are connected

three channels of the same structure, each of which consists of series-connected triggers, the BENCH diagram 1 and the registrar. So, the first channel consists of a serially connected trigger 6, a BAN 7 element and a registrar 8, a second channel - from a trigger 9, a BAN 10 element, a registrar 11, a third channel - a trigger 12, a BAN 13 element, a registrar 14. In addition, the device contains a key 15, the control input of which is connected to the output of the one-shot 3, the information input - to the output of counter 4, the output - to the second inputs of the elements BAN 7, 10 and 13. The device also has serially connected generators

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The rator 16 and the additional element BANCH 17, the output of which is connected to the information input of the counter 4, and the second input - with the output of the trigger 12. The output of the one-shot 3 is connected to one of the inputs of the triggers 6, 9 and 12.

The device works as follows.

When lightning discharges, an alternating electromagnetic field appears in the surrounding space. These lightning signals are perceived by antenna 1 and are fed to selection unit 2, which may include frequency and amplitude. selectors. Their main purpose is to amplify lightning signals from the entire set of electromagnetic signals of thunderstorm and other origin. If the amplitude of the signal at the output of the selection unit 2 turns out to be greater than a predetermined value, then the one-shot 3 is triggered, which performs the functions of the threshold device and the pulse extender. When triggered, the one-shot 3 impulses a 1-second pulse at the output, which prevents it from being triggered when registering a multi-component lightning.

The leading edge of the pulse produced by the one-shot 3 opens the key 15, which allows the information accumulated between the two lightning flashes in the counter 4 to be transmitted to the recorders 8, 11 and 14, respectively, through the elements BANNER 7, 10 and 13 o. 3, the counter 4 is zeroed, the key 15 is closed and the triggers 6, 9 and 12 are zeroed. The signal from the output of the trigger 12, which is in the zero state, is not prohibiting the element BAN 17, and it becomes able to pass pulses from generator 1 output 6 to the information input of counter 4, where they are counted until the next lightning appears and the counter is zeroed 4. Generator 16 can, for example, produce a pulse at the output every second, i.e. work like an electronic clock. Thus, in the counter 4, the duration of the time interval between two consecutive lightnings is recorded. The information from counter 4 is transmitted to the decoder 5. Once from

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the generator 16, the counter 4 receives the twenty-first pulse, and a signal appears at the first output of the decoder 5, which translates the trigger 6 into one state and the signal from the output of which acts on the FORWARD. PRET 7 element and closes it for the passage of signals from the counter output 4 to the recorder's input 8.

In the same way as described, as soon as the sixth first impulse arrives from the generator 16, a signal appears at the second output of the decoder 5, which translates the flip-flop 9 into a single state, the signal from whose output acts on the BANNER 10 and closes it for the passage of signals from the output of counter 4 to the input of recorder P. I, as described above, as soon as generator three hundred and three hundred first, a pulse arrives, a signal appears at the third output of decoder 5, which triggers trigger one, signal from the output of which acts on the element BANCH 13 and shorts it to pass signals from the output of counter 4 to the input of the recorder 14. In addition, the signal from the output of the trigger 12 acts on the element of BANNER 17 and closes it to pass signals from the output of the generator 16 to the input of the counter 4, which stops the accumulation of information in the counter 4.

Thus, if the time interval between lightning is 0-20 seconds, it is recorded in the recorders 8, 11 and 14 and refers to a strong thunderstorm. If the time interval between lightning is 21-60 seconds, it is recorded in the recorders 11 and 14 and refers to a thunderstorm of medium intensity. If the time interval between lightning is 61-300 seconds, it is recorded in the recorder 14 and refers to a thunderstorm of low intensity.

Recorders consist of an adder and an indicator. Accumulators accumulate information on the duration, respectively, of a strong, not lower than average, and not less than a weak thunderstorm activity. Indicators serve to display information stored in accumulators. If the time interval between lightning exceeds 300 s, then this information is not recorded by any of the recorders, since these lightning are related to two different thunderstorms.

In addition to gradation in intensity: the thunderstorm is weak, the average thunderstorm and thunderstorm is strong, in necessary cases the number of intensity levels of thunderstorm activity can be increased. To do this, it is necessary to connect a series of channels to the corresponding outputs of the decoder 5, each of which must consist of a series-connected trigger, a BANNER element and a recorder.

 The proposed device makes it possible to significantly improve the accuracy of recording the duration of thunderstorm activity at several levels of its intensity due to direct measurement and summation of the time intervals between individual lightning.

Claims (1)

Invention Formula A device for recording thunderstorms, containing a series-connected antenna, a selection unit, a one-shot and an im- Pulchyuv, as well as a generator and recorders, characterized in that, in order to improve the accuracy of recording the duration of a thunderstorm activity at several levels of its intensity, it is equipped with a decoder, a key, chains of gradations of levels, each of which consists of successively connected flip-flops. and the BAN element, as well as an additional BAN element, with the input of each of the triggers associated with the corresponding output of the decoder, and the output of each of the BAN elements with the input of the corresponding recorder, the key's key input is connected to the second one-shot output, the information one is connected to the counter output, and the output is connected to the second inputs of the BANNER elements, the first input of the additional BAN element is connected to the generator output, the second to the minimum level trigger output, and the information output the input of the counter, the second output of which is connected to the input of the decoder, the third output of the one-shot is connected to the second inputs of each trigger.