Device for collecting voltage and current of epoxy resin composite material under action of lightning current

Abstract

The invention discloses a device for collecting voltage and current of an epoxy resin composite material under the action of lightning current. The device comprises a lightning current generating device, a voltage divider, a current divider, a signal acquisition and control unit and an epoxy resin composite material clamp, wherein the lightning current generating device comprises a charging unit,an adjustable pulse capacitor bank, a multi-access terminal type wave modulation resistor, a wave modulation inductor and a three-electrode gas spark switch; the charging unit comprises an isolation transformer, a boosting transformer, a voltage doubling rectifying circuit and a current limiting resistor; the multi-access terminal type wave modulation resistor, the wave modulation inductor, the voltage divider and the signal acquisition and control unit are sequentially connected in series to form a third loop; and the current is isolated from a computer control unit through photoelectric isolation, so that the safety in the measurement process is ensured, and meanwhile, the accuracy in the measurement process is ensured. The adjustable pulse capacitor bank is matched with the multi-accessterminal type wave modulation resistor, so that various common lightning current waveforms in the nature can be simulated.

Description

technical field [0001] The present invention relates to the technical field of voltage and current collection under the action of lightning current, in particular to a device for collecting voltage and current of epoxy resin composite material under the action of lightning current, in particular to epoxy resin composite material when the peak value of lightning current reaches tens of kA The above lightning current collection device and collection method. Background technique [0002] Lightning has become a major public hazard in information technology, and the measurement of lightning current characteristic parameters is of great significance for lightning research and lightning protection. [0003] The traditional lightning current acquisition device adopts a single-channel design. It works in the acquisition state during operation. If no effective trigger signal is generated, the collected data will be discarded continuously. When a lightning strike occurs, the generated ...

AI Technical Summary

Problems solved by technology

[0005] The thermal conductivity and electrical conductivity of epoxy resin composite materials are poorer than those of metal materials. When lightning strikes composite materials, due to the effects of arc ablation, gas impact and Joule heat, the epoxy resin in the composite materials will be pyrolyzed, which will affect the flight performance of the aircraft. serious threat to security

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