ELECTRONIC SYSTEM FOR THE DETECTION OF VOLATILE ORGANIC VAPORS
ELECTRONIC SYSTEM FOR THE DETECTION OF VOLATILE ORGANIC VAPORS
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DOI: 10.22533/at.ed.3173402323119
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Palavras-chave: Organic vapors, resonance frequency, mechanical vibrations.
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Keywords: Organic vapors, resonance frequency, mechanical vibrations.
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Abstract:
This work shows the application of piezoelectric PZT in the detection of vapors of volatile organic compounds, such as alcohols. The model of a resonator system was applied to obtain the mechanical behavior, particularly the amplitude of the resonance frequency. An electrical circuit was implemented to measure the impedance value of the trampoline, which is manifested as the minimum voltage in the voltage divider circuit that corresponds to the resonance frequency of the trampoline. For the detection of organic vapors, a film of ethyl cellulose was deposited on the piezoelectric using the casting method. A change in its resonance frequency is proportional to the increase in mass. The resonance frequency of the trampoline was 4.751 KHz, with a shift of 30 Hz produced by the deposition of the sensitive film, and its response to ethanol was a frequency shift of 79 Hz.
- Margarita Galindo Mentle
- Luis Ángel Blas Sánchez
- Adolfo Quiroz-Rodríguez
- Marlon Gonzalez Licona
- Juan Vargas Ferrer