W artykule przedstawiono wyniki prac koncepcyjnych, projektowych i wykonawczych oraz wyniki badań testowych, związanych z pracowaniem prototypu czujnika-przetwornika wibracyjnego do pomiaru natężenia stałych i wolno-zmiennych pól elektrycznych.
EN
The paper presents results of conceptual, design, and construction works as well as results of tests related to the development of a prototype vibration sensor for measurements of static and low frequency electric fields.
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Analysis of impulse compaction process shows that during compaction process moulding sand is subject to deformation and changes of total pressure, measured inside compacted moulding sand, represent fading sinusoid. Measured pressure values in stationary states (after compaction process) are equal to the sum of squeezing pressure pc and the pressure resulting from compacting the sandmix pu, which expresses the obtained strength. Therefore experimental research of moulding sands were conducted. Strength factor Rc and pressure pu values were determined as a function of densening degree \delta. Analysis of presented results proves that pu pressure resulting from compacting of the moulding sand expresses compressive strength factor Rc. This confirms that developed methodology permits strength measurements of moulding sand in the mould. Moreover as it is possible to determine pu values with simulation research of developed mathematical model of impulse process it is possible to determine compressive strength factor.
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