Abstract
In daily life, the temperature in our side the ever-present, the control of the temperature and
the application in various fields all have important role. Many industry there are a large number
of electric heating equipment, and the temperature control equipment, such as used for alarm
automatic temperature alarm systems, heat treatment furnace, used to melt metal crucible
resistance furnace, and all kinds of different USES of temperature box and so on, these using
single chip microcomputer, using single chip computer language program to control them. And
single-chip microcomputer technology has control and convenient in operation, easy to modify
and maintenance of simple structure, flexibility is large and has some of the intelligence and
other characteristics, we can accurately control technology standard to improve the temperature
control index, also greatly improve the quality of the products and performance. Because of the
advantages of the single chip microcomputer intelligent temperature control technology
outstanding, is being widely adopted.
This paper introduces the temperature control based on single chip microcomputer
AT89C51 design scheme of the system and the hardware and software implementation. The
temperature sensor DS18B20 collection temperature data, 7 period of digital pipe display, the
upper and lower limits of temperature button when temperature below the setting of the lower
limit, light green leds, when the temperature is higher than the set on the limit, light red leds.
Given the system framework and program flow chart and principle chart, and in Protel hardware
platform to realize the function of the design.
Keywords： SCM Temperature control system Temperature sensors
