Measuring system and a method for detecting static electricity and/or change thereof in a measuring object and use thereof
First Claim
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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Abstract
A method and a measuring system for detecting static electricity in a measuring object includes at least a sensor, a voltage meter, and a processor unit with a signal processing unit connected to the voltage meter. The sensor includes a sensing element arranged so that the electric field of the measuring object induces in the sensing element an electric signal which is proportional to the change in the electric charge of the measuring object. The sensor includes a detector including a capacitive circuit, such as a capacitor circuit, having an integrating effect on the measuring values which are read off by the voltage meter, connected between the sensing element and the voltage meter.
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Citations
28 Claims
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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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of detecting at least one of static electricity and a change thereof in an object to be evaluated, utilizing a measuring system including a voltage meter which reads measuring values, a processor unit with signal processing, connected to the voltage meter, and at least one sensor comprising a sensing element and a detector, the detector comprising a capacitor circuit;
- said method comprising;
(a) positioning a sensing element in or near the object to be evaluataed so that the electric field of the object induces an electric signal in the sensing element indicating a change in electric charge, which signal is proportional to the electric charge of the object; (b) using the capacitor circuit to transmit the signal induced in the sensing element to the voltage meter; and (c) integrating the measuring values which are read by the voltage meter by practicing (b) utilizing a resistance R connected in parallel with the capacitor circuit so that the time constant T=R*C of the capacitor at discharge is within the range of 0.01-5 seconds. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
- said method comprising;
Specification