The Title of the thesis
ABSTRACT
Temperature is the common industrial production process parameter ， any
physical change and chemical reaction process closely is related with the temperature.
In scientific research and production practice of many areas ， temperature control
occupied an extremely important position，especially in the metallurgical，chemical，
building materials，food，machinery，petroleum industry，which play a decisive role
role. For different production conditions and technological requirements of
temperature control，the way of heating，fuel，control scheme is also different. For
example ， metallurgy ， machinery ， food ， chemical and other types of industrial
production is widely used in all kinds of heating furnace，heat treatment furnace，
reactor；fuel gas，natural gas，oil，electricity etc.. Temperature control system of the
process is complex and changeable，uncertain，so the system requires more advanced
control technique and control theory.
Programmable logic controller ( PLC ) programmable controller is a kind of
industrial control computer ， is the successor of computer ， automatic control
technology and communication technology as a whole new type of automatic device.
It has strong anti-interference ability ， low price ， high reliability ， easy
programming，easy to use and other characteristics，in the industry in the field by the
project operator like，so PLC has in the various fields of industrial control has been
widely used.
