yi zhong xin she ji de da qi dian chang yi
In this paper;a kind of field mill for measuring the surface atmospheric field intensity is recommended.In consideration of that the instrument should be able to measure continuously the field intensities with severe changes under the condition of thunderstorms;its design has to be provided with new electronic circuit and construction.Through practical use for three years;this instrument has proved himself suiting the needs of our research work. The field mill has two measuring ranges. On weather of stable condition;the linear range is used;its measuring range is±1000V/m;and on weather condition with severe changes;the logarithm range is adopted;whose measuring range is±100kV/m.
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