Data acquisition system for thunder and lightning three-dimensional magnetic field

Abstract

The invention provides a data acquisition system for a thunder and lightning three-dimensional magnetic field. According to the Faraday's law of electromagnetic induction, an antenna capable of sensing a thunder and lightning magnetic field is designed. According to the characteristics of cloud thunder and lightning magnetic pulses, a signal conditioning circuit and an A / D conversion circuit are designed. Two triggering modules are adopted as the control switch of an acquisition circuit. Finally, the interface of an upper computer is designed by using the Qt. The synchronous collection based on three paths of channels is adopted by the system, so that the peak information, the thunder and lightning occurrence time, the azimuth angle and the magnetic field change waveform of the thunder and lightning three-dimensional magnetic field can be recorded. After that, the recorded information is transmitted to the upper computer through a wireless network. According to the invention, effective data can be provided for the positioning and the early warning of the thunder and the lightning. Meanwhile, important parameters, such as the peak value, the waveform, the rising time and the like of the thunder and lightning current can also be estimated through the data inversion of the acquired three-dimensional magnetic field data. Therefore, the system provides a novel idea for the indirect analysis of thunder and lightning characteristics.

Description

technical field [0001] The invention belongs to the technical field of meteorological monitoring, and in particular relates to a lightning three-dimensional magnetic field data acquisition system, which can be applied in the field under unattended conditions due to its low power consumption characteristics. Background technique [0002] Lightning is the discharge phenomenon of atmospheric movement in nature, including cloud flash and ground lightning, among which the most threatening to human society is ground lightning. When lightning occurs, not only will the atmospheric electric field transiently change, but it will also be accompanied by strong electromagnetic pulses, which can easily affect the normal operation of various electronic and electrical equipment. Therefore, the comprehensive measurement of the lightning electromagnetic field can provide the required data for lightning analysis, and is of great significance for lightning location and lightning warning. [00...

AI Technical Summary

Problems solved by technology

Among the many measurement methods, mainly for one-dimensional or two-dimensional magnetic field measurement, the data obtained are not comprehensive enough, and it is difficult to fully understand the change law of lightning occurrence

Some lightning electromagnetic field measurement systems directly use an oscilloscope to display the magnetic field waveform, and the changing waveform of the magnetic field can be seen, but the magnetic field strength cannot be accurately measured

The traditional data acquisition is the work of the industrial computer with the acquisition card, which is large in size and consumes a lot of power, which is limited when used in the field.

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