| 摘要 |
An apparatus for detecting and measuring disturbances in an electromagnetic field caused by the electrostatic potential of a charged object moving the field includes a DC source, a loop/solenoid coil, and a metering unit. The DC source charges the loop/solenoid coil, and thereby creates the electromagnetic field that emanates from the coil. The metering unit is provided to (indirectly) sense and quantify the disturbances in the electromagnetic field of the loop/solenoid coil by indicating a change in a current flow through the coil. The apparatus may be configured with a housing to enclose a plurality of components of the apparatus including the DC source, the loop/solenoid coil, and the metering unit.
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