ABSTRACT
In recent years, with the computer penetration in the social field, the application
of SCM is to keep at the same time, traditional control testing update on Crescent
benefits. In real-time detection and automatic control system of single-chip
applications, often as a single-chip core component to use only single-chip is not
enough knowledge, but also the specific hardware structure and the specific features
of application software objects combine to make perfect.
In this paper, both hardware and software for automatic control of water
temperature on the process, in the control of the main application of the process of
AT89C51, ADC0809, LED display, LM324 comparator, but mainly through the
digital temperature sensor DS18B20 collecting ambient temperature to single-chip
microcomputer as the core control components, and through four real-time digital
display of a digital thermometer temperature. Software using assembly language for
programming, so that the implementation of Directive speed, to save storage space. In
order to facilitate the expansion and changes to the design of modular software
structure, so that the logic of the relationship between program design more
concise,Hardware software co-operation under the control of it.
And systematic process is: First of all, by setting the button, set the thermostat
temperature at the time of operation, and digital display of the temperature. Then, in
the running temperature of the process of sampling analog into the A / D converter in
the simulation - digital converter, and then converted digital control with digital
display, the last single-chip microcomputer to control the heater used for heating or
stop heating until the temperature in the provisions under the constant temperature
heating.
Key words：Single-chip microcomputer system ；Sensor；Data Acquisition；
ADC；Temperature
