Automatic electrostatic spark energy calculation method based on LCR equivalent model

Abstract

The invention discloses an electrostatic spark energy automatic calculation method based on an LCR equivalent model. The method mainly comprises the following steps of: removing direct-current bias and high-frequency noise existing in discharge current; automatically acquiring a crest value of the discharge current waveform and a moment corresponding to the crest according to a preset discrimination condition; calculating oscillation angular frequency, system inherent inductance and first peak current according to the discharge period; calculating logarithmic attenuation rate, damping ratio, loop resistance, spark resistance and spark inductance; fitting the discharge current curve, calculating a fitting degree, if the fitting degree is superior to a set threshold value, executing subsequent operation, otherwise, returning to adjust the proportionality coefficient of the exponential terms in the spark resistance and the spark inductance; and calculating the electrostatic spark discharge energy. According to the method, the spark resistance is automatically solved only through the discharge current waveform data, the effectiveness of spark resistance solving is judged through the discharge current waveform fitting effect, and then the spark discharge energy is automatically calculated.

Description

technical field [0001] The invention relates to an automatic calculation method of electrostatic spark energy, in particular to an automatic calculation method of electrostatic spark energy based on an LCR equivalent model. Background technique [0002] The dust cloud minimum ignition energy tester is a test device that reflects the sensitivity of dust ignition from the perspective of energy, and is widely used in evaluating the potential explosion hazard of dust clouds. The minimum ignition energy data measured by the dust cloud minimum ignition energy tester is directly related to the hazard level of the dust to be tested. If the measured minimum ignition energy value is too large, the hazard classification is too low, which may bring immeasurable Serious hidden dangers; if the measured minimum ignition energy value is too small, the hazard rating will be too high, which will add extra cost to the explosion-proof and explosion-suppression design of the relevant production ...

AI Technical Summary

Problems solved by technology

However, there is usually a phase difference between the discharge voltage U and the discharge current I, and it is necessary to manually adjust the phase of the discharge voltage and current curves, otherwise there will be magnitude differences in the integral calculation results

However, the phase difference between the discharge voltage and the discharge current varies with the discharge frequency, and it is extremely difficult to uniformly calibrate the phase difference, which makes it difficult for this method to be automatically calculated by a program

The method of manual manual calibration leads to low calculation efficiency and is prone to large human bias

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