Patent ID: 6031378
Filing Date: 2000-02-29
Classification: G01R

Abstract:
A measuring system for detecting at least one of static electricity and change of static electricity in an object, comprising:a voltage meter which reads charge measuring values;a processor unit with a signal processing unit connected to said voltage meter;at least one sensor comprising: a sensing element positionable with respect to an object to be evaluated so that the electric field of the object induces in said sensing element an electric signal indicating a change in electric charge which is proportional to the electric charge of the object; and a detector comprising a capacitor circuit having a capacitance connected between said sensing element and said voltage meter for transmitting to said voltage meter the signal induced in said sensing element indicating a change in electric charge, for measuring the change in the charge; anda resistance R connected in parallel with said capacitor circuit so that the time constant T=R*C of said capacitor circuit at discharge falls within the range of 0.01-5 seconds, so that said capacitor circuit has an integrating effect on the measuring values which are read by said voltage meter.