Method and device for calibrating eclectic arc discharge energy correction factor

Abstract

The invention relates to a method and a device for calibrating an eclectic arc discharge energy correction factor. A formula of eclectic arc discharge energy is given according to a semi-empirical formula of minimum ignition energy; energy generated in the electric arc discharge process is calculated according to a relation that the voltage and the current of a gas discharge electric arc change along with time, and finally, in combination with the temperate of the eclectic arc obtained by measurement, the arc length and the radius, the value of the correction factor in the formula is calibrated. The method comprises the following steps: (1) measuring the voltage and current information of the gas discharge electric arc; (2) obtaining the energy generated in the discharge process through an integral of a product of the voltage and the current on a time axis by adopting a mathematical method; (3) measuring the spectral information of the electric arc to obtain the temperature of the electric arc; (4) measuring the size information of the electric arc, wherein the size information comprises length and radius; (5) substituting into the calibration formula of the discharge energy E of the electric arc according to the energy obtained in the step (2), the temperature obtained in the step (3) and the size information obtained in the step (4) to obtain the value of the correction factor K1. The method provided by the invention is convenient to configure and flexible to operate and can quantifiably measure and calibrate the correction factor in the electric arc discharge energy formula.

Description

technical field [0001] The invention relates to a calibration method and a calibration device for an arc discharge energy correction coefficient, in particular to a method for calibrating a correction coefficient in a gas discharge energy formula by indirect measurement of energy, temperature and size information obtained in a strong electromagnetic environment, which belongs to electromagnetic compatibility testing technology field. Background technique [0002] When the electric field in the air is strong enough, the gas molecules will be ionized to form plasma, and a short discharge current will be generated to consume or neutralize the charges, emit light and heat, and produce sound. The spark discharge generally lasts for a short time, and the required electric field strength is very high. Such a field strength generally exists between the tips of two conductive metal bodies, so it is also called tip discharge. [0003] The strong electromagnetic field environment can ...

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Problems solved by technology

[0005] However, the direct test method also has some insurmountable shortcomings: First, the direct test method is relatively unsafe, and the combustible gas in a confined space is not easy to control after being ignited, and even has the risk of explosion; the direct test method can only carry out qualitative analysis , the test results are only valid for the test conditions, so quantitative data cannot be obtained, so the test data cannot be used to evaluate the results under other test conditions; because the main parameters of the discharge phenomenon cannot be recorded during the test, it is impossible to monitor and analyze them in real time and record test data, it is impossible to provide a reference for system improvement

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