SU1080105A1 - Device for registering thunderstorm activity - Google Patents

Abstract

A DEVICE FOR DRAWING REGISTRATION, containing an antenna connected in series, a selection unit, a single vibrator, a trigger and a coincidence circuit, the second input of which is connected to the output of the pulse generator, as well as an indicator that, in order to increase the accuracy of registration when automatically determining the duration of a thunderstorm it is equipped with a pulse counter connected in series, the input of which is connected to the output of the coincidence circuit, a key and an adder, the output of which is connected to Odom indicator monostable output coupled to the control input of the key and with the reset input of the pulse counter, an additional output is connected to the reset input latch, the output of which is coupled to the reset input of the pulse counter.

Description

The invention relates to meteorological instruments and can be used to obtain information on the duration of thunderstorms. Devices for recording thunderstorms are known, comprising an antenna, a filter, four prohibition schemes, three one-shot, a coincidence circuit, a trigger and a recording device t; 1 3. The closest to the proposed technical essence and the achieved result is a thunderstorm recording device containing a serially connected antenna, filter-vibrator, trigger, coincident circuit and recording device, as well as a clock generator, the output of which is associated with one from the inputs of the coincidence circuit. The output of the registering device is connected to one of the inputs of the trigger 12. In the known device, the duration of the lightning activity onp is divided by the number of clock intervals during which the device records at least one lightning. At the same time, the duration of the first and last in a thunderstorm clock interval is fully taken into account in the duration of a thunderstorm, although lightning can occur only at the end of the first wilderness at the beginning of the last tact interval, which introduces an error in the definition of a prolonged thunderstorm. The purpose of the invention is to improve the accuracy of registration with the automatic determination of the duration of the thunderstorm activity. This goal is achieved by the fact that a device containing an indicator and a clock pulse generator, as well as a serially connected antenna, a selection unit, a one-shot trigger and a coincidence circuit, one of whose inputs is connected to the output of a clock generator, is equipped with a series-connected pulse counter, the input of which associated with the output of the coincidence circuit, a key and an adder, the output of which is connected to the input of the indicator. At the same time, the output of the one-shot is connected to the control input of the key and to the zeroing input of the pulse counter, the auxiliary output of which is connected to the zeroing input of the trigger, the output of which is connected to. Figure 2 shows the structural diagram of the proposed thunderstorm recording device (operation | figure; figure 2 shows the moments of occurrence of lightning, the sum of time intervals between which is equal to the duration of the thunderstorm. The device contains series-connected antenna 1, unit 2 choices, one-shot 3, trigger 4, hem 5 coincidence, impulse counter 6, key 7, adder 8 and inikator 9, as well as a pulse generator 10, the output of which is connected to one of the inputs of coincidence circuit 5. The output of the single vibrator 3 is connected to key 7 and with the zeroing input of the pulse counter b, the auxiliary output of which is connected to the trigger zero input of trigger 4, the output of which is connected to the zeroing input of the pulse counter B. The device works as follows. The alternating electromagnetic field. These lightning signals are perceived by the antenna 1 and enter the selection unit 2. The selection unit 2 may include frequency and amplitude selectors. Their main purpose is to isolate lightning signals from their combination of electromagnetic signals of thunderstorm and industrial origin. If the amplitude of the signal at the output of the selection unit 2 turns out to be greater than a specified value, then the one-shot 3 is triggered, which performs the functions of the pulse expander. When triggered, the one-shot 3 produces an output pulse with a duration of 1 s, which eliminates the multiple registration of a separate multicomponent lightning. The leading edge of a pulse produced by the single vibrator 3 after the arrival of electromagnetic signals from the first lightning, the trigger 4, assembled according to the separate start circuit, switches to a single state, and the coincidence circuit 5 becomes capable of passing generator 10 pulses to the input of counter b, where they are counted . After the arrival of electromagnetic signals from the second lightning, a 1-second pulse appears at the output of the one-oscillator 3, which, however, cannot change the position of the trigger 4, since the latter is assembled according to a separate-start scheme. The leading edge of the pulse that acts on the control input of the key 7, the latter opens, and information from the pulse counter 6 is transmitted to the adder 8. By dropping the pulse produced by the one-shot 3, the counter b is zeroed. When the signal of each subsequent lightning arrives, the described operation cycle of the device repeats. The generator 10 may, for example, output a pulse every second, i.e. work like an electronic clock. The accumulator 8 accumulates information about the sum of the time intervals between all the flashes, i.e. determines the duration of a thunderstorm. The indicator 9 serves to display information stored in the adder 8 for visual observation. Upon the arrival of the last lightning, i.e. after the end of the thunderstorm, pulses from the generator 10 continue to arrive at the input of the counter 6, therefore, they are counted. After a predetermined predetermined time, after 15 minutes, counter 6 overflows, and a signal appears at its additional output that returns trigger 4 to zero. Signal B from the output of trigger 4 zeroes the pulse counter b. After that, the device is in the initial state and is ready to record the duration of the next thunderstorm. The time interval between the last lightning and the return of the device to its original position is not included in the duration of the thunderstorm, since in this case the one-shot 3 does not operate and, therefore, the information is not transmitted.

0 from counter 6 to adder 8.

The proposed device for recording thunderstorm activity allows one to fully automate the process of determining the duration of thunderstorms and to replace the meteorological observer, which is currently in place. performs this function on a network of weather stations.

The proposed device, compared with the base object, has a smaller measurement error for the duration of thunderstorms.

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Claims (1)

A device for registering a thunderstorm activity, which contains a series-connected antenna, a selection unit, a single-shot, a trigger and a matching circuit, the second input of which is connected to the output of the pulse generator, as well as an indicator, characterized in that, in order to increase the accuracy of registration during automatic detection duration of lightning activity, it is equipped with a pulse counter connected in series, the input of which is connected to the output of the coincidence circuit, a key and an adder, the output of which is connected to the input indicator, the monostable output is connected to the control input of the switch and the reset input of the pulse counter, an additional output is connected to the reset input g trigger, whose output is connected to the reset input of the pulse counter. I