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The method of determining seed moisture based on the signal generated by the piezoelectric plate

Boguta Artur, Majcher Jacek

Przegląd Elektrotechniczny

2021

R. 97, nr 1

125--127

The paper presents research on determining the moisture content of various species of seeds based on the shape of the signal generated by the piezoelectric plate when hitting the seeds against it. For this purpose, a measuring stand was made on which the tests were carried out. The studies used different seed species with a near-spherical shape to eliminate the influence of the grain's impact on the plate. Based on the obtained signal waveforms, an algorithm was proposed with which the voltage rise coefficient on the piezoelectric transducer was calculated.

W pracy przedstawiono badania dotyczące określania wilgotności różnych gatunków nasion w oparciu o kształt sygnału napięciowego generowanego przez płytę piezoelektryczną przy uderzeniu nasion. W tym celu wykonano stanowisko pomiarowe, na którym zostały przeprowadzone testy. W badaniach wykorzystano różne gatunki nasion o kształcie zbliżonym do sferycznego, aby wyeliminować wpływ kształtu nasion na wyniki pomiarów. Na podstawie uzyskanych krzywych sygnału zaproponowano algorytm, w którym obliczono współczynnik wzrostu napięcia na przetworniku piezoelektrycznym.

Modelling of complex piezoelectric system by non-classical methods

Buchacz A., Wróbel A.

Journal of Achievements in Materials and Manufacturing Engineering

2009

Vol. 35, nr 1

63-70

Purpose: Present paper is continuation of earlier publications with stack of piezoelectric plates. This work is an author’s idea of calculations of complex systems with many elements. Design/methodology/approach: The base of calculation is matrix method and application of aggregation of graphs to determination characteristic parameters of bimorphic systems, as well as to drawing its characteristics. Findings: The analysis of complex piezoelectric system was shown to determinate characteristics of it. Research limitations/implications: In the article problem of mechatronic system analysis on example of longitudinal vibration of piezoelectric plates was presented. In the future analysis of plate with bending vibration will be done. Practical implications: Presented analysis method of piezoelectric effect in complex systems is well suited for determining the flexibility of bimorphic stack of piezoelectric plates in vibration sensors. This sensors are used to the level detection of materials. Originality/value: Thanks to the approach, introduced in this paper, analysis of bimorph system was done by means of the graph and structural numbers method.