Lightning discharge identification system

Details Lightning discharge identification system Lightning discharge identification system

1979-05-30

1981-06-09

Tokar, Michael J.

Electricity: measuring and testing

Testing potential in specific environment

Voltage probe

324 77R, G01R 3102

Patent

active

042727200

ABSTRACT:
A system for differentiating between cloud-to-cloud and cloud-to-ground lightning discharges which include an electric field antenna that senses the rate of change of an electric field produced by a lightning discharge. When the signal produced by the electric field exceeds a predetermined threshold, it is fed to a coincidence detector. A VHF antenna it also provided and generates a video signal responsive to a cloud-to-cloud lightning discharge, and this signal is fed through a level sensor, an inverter, to the coincidence detector simultaneously with the signal from the field detector. When signals from the electric field antenna and the VHF antenna appear at the coincidence detector simultaneously, such indicates that there is a cloud-to-cloud lightning discharge; whereas, when there is not a signal produced on the VHF antenna simultaneously with a signal produced by the field sensor, then a strike indicator connected to the coincidence detector indicates a cloud-to-ground lightning discharge.

REFERENCES:
patent: 3753117 (1973-08-01), Downing et al.
patent: 4100487 (1978-07-01), Fletcher
patent: 4115732 (1978-09-01), Krider
patent: 4198599 (1980-04-01), Krider

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