AUTOMATED NOISE FILTRATION SYSTEM FOR TEMPERATURE MEASUREMENT OF THE DESICCATOR

Dmytro Trushakov, O. Kozlovskyi, S. Rendzinyak, V. Korud, M. Fedotova

Abstract


The results of the study of problems of automation of temperature regimes of the desiccator are presented. One of the processes currently subject to immediate automation is the drying of grain, which in most cases is carried out using morally and technically obsolete specialized equipment, such as drying cabinets designed for drying at a certain humidity of grain and other moisture-intensive crops in the agricultural industrial complex. The implementation of integrated automation tools in the grain processing industry can significantly reduce costs, increase the yield of finished products, and increase productivity and improve working conditions.

One of the most common drying cabinets to date is SESH-3M, which is widely used in agricultural enterprises and is used in laboratories of elevators, grain mills, flour mills, cereals, feed, bakery enterprises, and research and development institutions in agriculture. Unfortunately, the level of automation of that drying cabinet does not meet the modern requirements of agricultural production. Therefore, research aimed at developing an automated system of automatic temperature control is relevant. The purpose of this work is to create an automated system for measuring the temperature of the desiccator using modern automation methods and automation elements. Due to the fact that the level of the output signal of the temperature sensor is a few millivolts, the main attention is paid to the synthesis of a low-pass filter to extract a useful signal from the information signal with noise.

The conducted theoretical researches allowed to creation of an effective automated system for measuring the temperature of the desiccator. A feature of the developed functional scheme of the device for connecting the thermocouple with an analog-to-digital converter is the functional completeness and ease of implementation. The characteristics of the synthesized low-pass filter meet the specified requirements to ensure noise reduction of the measured values and noise immunity of the system as a whole. Experimental studies of the low-pass filter were shown that the output signal of the automated system, which contains information about the change in oven temperature, is effectively filtered from the accompanying noise and significantly exceeds it.

Key words: automated system, thermocouple, low-pass filter, desiccator.


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DOI: http://dx.doi.org/10.30970/eli.15.8

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