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Electrostatic charge analyzer calibrating device and electrostatic capacitor measuring method

A calibration device and electrostatic charge technology, which can be used in instruments, measuring devices, measuring electrical variables, etc.

Active Publication Date: 2013-12-25
BEIJING DONGFANG MEASUREMENT & TEST INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0030] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a calibration device for electrostatic charge analyzers and a method for measuring electrostatic capacitors, which solves the problems of hidden dangers of electric shock on flat plate electrodes, hidden dangers of instrument burnout, etc.; increases safety and solves problems at the same time Solved the problem of capacitor traceability; and it is practical

Method used

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  • Electrostatic charge analyzer calibrating device and electrostatic capacitor measuring method
  • Electrostatic charge analyzer calibrating device and electrostatic capacitor measuring method
  • Electrostatic charge analyzer calibrating device and electrostatic capacitor measuring method

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Embodiment Construction

[0107] Such as image 3 Shown is the equivalent circuit diagram of an electrostatic capacitor. The actual electrostatic capacitor consists of electrostatic capacitance C, series resistance R s , parallel resistance R p composition. The definition formula of electrostatic capacitance C is:

[0108] C = Q U

[0109] In the formula: C ---- electrostatic capacity, unit farad [F];

[0110] Q----the amount of electrostatic charge stored on the capacitor, unit coulomb [C];

[0111] U----The electrostatic voltage between the two plates of the capacitor, in volts [V].

[0112] The parallel resistance on the capacitive dielectric and other leakage paths is denoted as R p , R p Also includes the leakage formed by the neutralization of charged ions in the air and the charge on the electrode, when R p When it is less than a certain value (such as 1×10 12 Ω), the capacitor does not have the ability to st...

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Abstract

The invention discloses an electrostatic charge analyzer calibrating device and an electrostatic capacitor measuring method, which adopt a charge ferry device which through a mechanically rotated contact brush and a ferry capacitor, transmits changers of a standard direct-current high-voltage source to a to-be-calibrated instrument plate, help to enhance safety performance during the plate voltage calibration, so that an operator does not get hurt even if the operator contacts with a naked electrode. Since a contact method that two groups of serial resistors are in sequential contact in the brush circuit in the charge ferry device, no electrostatic sparks are generated during the charging and discharging process, and no electromagnetic interference is generated to the environment. Two technical schemes for attenuation time calibration are provided. A discharge capacitor is used to contact with a plate electrode so as to simulate a discharging process of the plate electrode; the plate voltages are controlled to cross the upper threshold and the lower threshold; a calculation method of the discharge capacitor is provided; a stopwatch or a discharge timer serves as the time standard; and calibration signal output is provided in the discharge timer for the traceability of a time parameter. The electrostatic capacitor measuring method, through a standard capacitor, traces electrostatic capacitance back to a digital electric bridge.

Description

technical field [0001] The invention relates to a calibration device for an electrostatic charge analyzer and a method for measuring an electrostatic capacitor, belonging to the field of electromechanical integration instruments. Background technique [0002] Charge Analyzer, also known as Charge Plate Monitor (CPM, Charge Plate Monitor), or Charge Plate Analyzer (CPA, Charge Plate Analyzer), is collectively referred to as "calibrated instrument" in the present invention. Common products include 3M711 of 3M Company, 268A of Monroe Electronics and other products. This product is used to detect the ability of electrostatic charge neutralization of electrostatic protection equipment such as static eliminators and ion fans. For the test of static eliminators such as ion fans, international and domestic standards have corresponding regulations and instructions, such as the International Electrotechnical Commission standard IEC61340-5-2Electrostatics-Part5-2: Protection of electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/00G01R27/26
Inventor 刘民佟雷袁亚飞罗宇轩
Owner BEIJING DONGFANG MEASUREMENT & TEST INST
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