Development Of Fuzzy Logic Temperature Controller - Micro Controller Base

Mohd Syahrir , Ribuan (2009) Development Of Fuzzy Logic Temperature Controller - Micro Controller Base. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Temperature is the most often-measured environmental quantity and some processes work well only within a narrow range of temperatures. Certain chemical reactions, biological processes, and even electronic circuits perform best within limited temperature ranges. One of the most important process variables to be controlled is temperature of liquid in many chemical engineering plants. In brief, changes of temperature of a water bath are one of the industrial problems needed to be controlled. This project will focus on designing a microcontroller based temperature control by fuzzy logic to control the temperature of a water bath. It will utilize a temperature sensor (LM35) to measure the temperature of the water inside the bath. This system will utilize PIC 16F877A (40 pins) microcontroller as it main processing units to accepts the analog output of the temperature sensor and processes it further for getting the actual temperature value in digital form. The microcontroller also is provided with a keypad interface and a display interface. The keypad will use to select the controller mode and to input the set point and the display interface will use to display the set point and the actual temperature of the water. This system also used a heater coil surrounding the water bath assembly to heat the water. The fuzzy logic controller used to control the water bath temperature.

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