NEW SYSTEM FOR DIGITAL ACQUISITION OF MICRODISCHARGE PULSES AND ITS EMPLOYMENT IN STATISTICAL ANALYSES

Tomáš Ficker - Jiří Macur - Milan Kliment - Stanislav Filip - Luboš Pazdera

   A new method of simplified digital acquisition of highly asymmetric microdischarge pulses is described, analyzed and implemented on a special hardware assembly. The recording system is coupled to a personal computer through an enhanced parallel port. The data are transferred from a static memory of the system to a computer disk using the procedure of double buffering that prevents delays in acquisition. Advantages as well as limitations of the system are discussed and illustrated. Employment of the new measuring system in statistical analyses of microdischarges is documented and the corresponding experimental results are given. The results concern time and height statistics, correlation and auto-correlation coefficients, fractal dimensions D extracted from height statistics and the dependence D(L) of fractal dimension on loading voltages.

Keywords: insulators, dielectrics, microdischarge pulses, experimental digital data acquisition

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