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Measuring system and a method for detecting static electricity and/or change thereof in a measuring object and use thereof

  • US 6,031,378 A
  • Filed: 11/13/1997
  • Issued: 02/29/2000
  • Est. Priority Date: 05/26/1995
  • Status: Expired due to Term
First Claim
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1. 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; and

    a 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.

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