Temperaturni vplivi na piezoelektrično merilno zaznavalo za dinamične tlačne spremembe

Lenarčič, Vid (author), Kutin, Jože (mentor), Svete, Andrej (co-mentor)

Temperatura predstavlja enega glavnih motilnih vplivov na piezoelektrična tlačna merilna zaznavala, zato smo v zaključni nalogi tovrstni vpliv želeli eksperimentalno popisati. Cilj eksperimentalnega dela je bil določiti merilno značilnico piezoelektričnega tlačnega zaznavala pri različnih temperaturnih pogojih, preko katere bi nato določili še koeficient občutljivosti. Za določitev statične občutljivosti piezoelektričnega tlačnega zaznavala smo izbrali kvazi-statično metodo. V prvem delu zaključne naloge smo opisali teoretično ozadje problema, predstavili naš merilni sistem in njegove komponente, ter opisali postopek meritev. V drugem delu smo dobljene rezultate predstavili in jih komentirali. Z eksperimentalnim delom smo ugotovili, da koeficient občutljivosti piezoelektričnega tlačnega zaznavala do temperature 40°C narašča z vrednostjo 0,0135 %/°C, nato pa začne padati z vrednostjo -0,0141 %/°C. Rezultati kažejo, da se s približevanjem temperaturnim ekstremom zaznavala, koeficient občutljivosti manjša.

• Language: Slovenian
• Keywords: vpliv temperature, piezoelektrično tlačno zaznavalo, koeficient občutljivosti, kvazi-statična metoda, tlačne spremembe
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [V. Lenarčič]
• Year: 2021
• Number of pages: XIV, 22, [1] str.
• PID: 20.500.12556/RUL-130354
• UDC: 531.787:536.5:537.226.86(043.2)
• COBISS.SI-ID: 83061763
• Publication date in RUL: 14.09.2021

Secondary language

• Language: English
• Title: Temperature effects on the piezoelectric sensor for dynamic pressure changes

Abstract

Temperature represents one of the main interfering effects on piezoelectric pressure measuring sensors, therefore the aim of the thesis was to describe this effect experimentally. The aim of the experiment was to determine the measuring characteristic of a piezoelectric pressure sensor at different temperatures, through which we would deterrmine the coefficient of sensitivity. For determining the static sesitivity of a piezoelectric pressure sensors, we chose a quasi-static method. In the first part of the thesis, we described the theoretical background of the problem, presented our measurement system and its components, and described the measuring procedure. In the second part of the thesis, we presented and discussed the obtained results. with the experimental work, we established, that the coefficient of sensitivity increases by a value of 0.0135 %/°C up to the temperature of 40°C, after which it begins to decrease by a value of -0.0141 %/°C. The results show that the coefficient of sensitivity decreases as we approach the sensor's temperature extremes.

• Keywords: temperature effect, piezoelectric pressure sensor, coefficient of sensitivity, quasi-static method, pressure changes