Electric Field Sensor for Lightning Early Warning System
AbstractElectric field mills are used popularly for atmospheric electric field
measurements. Atmospheric Electric Field variation is the primary
signature for Lightning Early Warning systems. There is a characteristic
change in the atmospheric electric field before lightning during a
thundercloud formation. A voltage controlled variable capacitance is
being proposed as a method for non-contacting measurement of electric
fields. A varactor based mini electric field measurement system is
developed, to detect any change in the atmospheric electric field and to
issue lightning early warning system. Since this is a low-cost device,
this can be used for developing countries which are facing adversities.
A network of these devices can help in forming a spatial map of electric
field variations over a region, and this can be used for more improved
atmospheric electricity studies in developing countries.