Investigating metering converter of capacitance using Arduino platform
2021
Vostrukhin, A., Stavropol Technological Inst. of Service (Russian Federation) | Vakhtina, E., Stavropol Technological Inst. of Service (Russian Federation)
The task of improving electronic devices for measuring the moisture content of agricultural seeds is always relevant. Knowledge of the best ways, methods and technical solutions in a particular field of activity is the basis for creating innovative devices. However, manufacturers do not disclose the hardware and software of their devices. This circumstance does not allow performing a comparative analysis and choosing the best solution, which slows down the technical progress and engineering education to a certain extent. This paper discusses the hardware and the operation algorithm for the measuring converter of capacitance (MCC), which is designed for constructing a dielcometric USB-moisture meter for seeds of agricultural crops, as well as the study results of its main characteristics. Arduino hardware and software (IDE) were used. A diagram of an experimental MCC sample, a model of a measuring circuit in the Multisim program and recommendations on the selection of elements for reference and measuring RC-circuits are presented. Studies have shown that MCC can be used for building dielcometric USB-moisture meters of seeds based on microcontrollers containing: an analogue comparator, a two channel 8-bit pulse width a modulator (PWM), a 10-bit PWM, and a USB interface. The transients used in MCC are fundamental, so the research results can be used in engineering education to study embedded computing systems. Transient processes in RC-circuits can be simulated in the Multisim program, as well as investigated using the Arduino platform, which allows to observe the results of the conversions on a computer monitor.
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