Electrostatic potentials measuring instrument, static eliminator and electrostatic potentials measuring instrument combined static eliminator

摘要

PROBLEM TO BE SOLVED: To measure electrostatic potential as well as to easily eliminate static electricity by providing a means for arithmetically operating a difference in an absolute value and/or the ratio of electric currents obtained by an ammeter for a (+) current and an ammeter for a (-) current. ;SOLUTION: Discharge is performed from a (+) discharge needle 22 and a (-) discharge needle 24 of a static eliminator 10 electrically connected to the human body 50 to eliminate static electricity of the human body 50. At the same time, this positive/negative discharge current is measured by ammeters 18, 20 to calculate a difference (I-J) between a (+) high tension current I and a (-) high tension current J and/or the ratio (I/J) by an operation circuit 32. Electrified electric potential of the human body 50 is determined from the polarity and the size, and a level of static electricity gathered in the human body 50 is displayed on a display device 34. For example, a red lamp 36 in the display device 34 is lighted in electrification of (+) static electricity of IJ, a green lamp 38 is lighted in nonelectrification of static electricity of I=J, and a yellow lamp 40 is lighted in electrification of (-) static electricity of IJ. Thus, electrostatic potential is constantly returned to 0 V.;COPYRIGHT: (C)2001,JPO