The Temperature Control System

Noor Faezah, Hamdi (2005) The Temperature Control System. Project Report. UTeM, Melaka, Malaysia. (Submitted)

	PDF (24 Pages) The_Temperature_Control_System_Noor_Faezah_bt_Hamdi.pdf24_Pages.pdf - Submitted Version Download (1MB)
	PDF (Full Text) The_Temperature_Control_System_Noor_Faezah_bt_Hamdi.pdf - Submitted Version Restricted to Registered users only Download (7MB)

Abstract

The objective of the project was to develop a temperature control system for maintaining a preset sequence of specified temperatures in a liquid substance during the mixing process in a boiler. The de power supply is responsible for powering each part of the system. The temperature of the liquid chemical is sensed by a temperature-sensitive resist or called a thermistor. The temperature of the chemical mixture determines the resistance of the thermistor. The temperature- to-voltage conversion circuit produces an output voltage that is proportion al to the temperature. The output goes to an analog-to-digital converter (ADC) which converts the voltage to digital form. The digital processor adds the appropriate scaling and linearization to the digitized voltage and sends it to the heater control circuit that is programmed to sequence through a series of set-point temperatures during the mixing process. The heater control circuit compares the set point temperature to the actual temperature as measured by the temperature- to-voltage conversion circuit and makes the p roper adjustments of the beating element. The details of the design developed were based on a Microchip PICI 6F84a, are described . The pedagogical value of the problem · is also discussed through a descript ion of some of the key steps in the design process. It is shown that solution required broad knowledge drawn from several engineering disciplines including electrical, mechanical and control Systems engineering.

Actions (login required)

View Item