Title :
A microcontroller-based programmable temperature controller
Author :
Kaliyugavaradan, S.
Author_Institution :
Sch. of Instrum. & Electron., Anna Univ., Madras, India
Abstract :
A microcontroller-based programmable temperature controller developed using an RTD sensor is described. A resistance-to-time converter is employed to obtain a time-interval linearly varying with the sensor resistance. Using a counter of the microcontroller and suitable software, temperature under control is determined and compared with a target temperature. The resulting error, through a DDC implementation of PID algorithm, is used to control the firing angle of an SCR for controlling the power applied to heater. Experimental results are given in support of the scheme proposed
Keywords :
electric sensing devices; microcontrollers; power control; programmable controllers; temperature control; three-term control; thyristors; DDC implementation; PID algorithm; RTD sensor; SR firing angle control; linearly varying time-interval; microcontroller-based programmable temperature controller; power control; resistance-to-time converter; sensor resistance; target temperature; temperature control; Chemical industry; Computer interfaces; Error correction; Microcontrollers; Sensor phenomena and characterization; Temperature control; Temperature distribution; Temperature sensors; Three-term control; Thyristors;
Conference_Titel :
Industrial Electronics, Control and Instrumentation, 1997. IECON 97. 23rd International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-3932-0
DOI :
10.1109/IECON.1997.671038
