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ABSTRACT
Temperature detection and control of industrial
production process, one of the more typical applications,
with sensors in production and life is more widely used,
using a new single-bus digital temperature sensor to achieve
the test and control the temperature more rapidly
development, this paper is designed based on AT89S52
temperature detection and alarm systems. The system will be
a single-bus temperature sensor DS18B20 and connected to a
port on the controller, the temperature sensors on loop
collection, the temperature will be collected to compare
with the set value, when the temperature exceeds the upper
limit set , through the circuit gives alarm signal. The main
content of this design is temperature testing circuit that
uses AT89S52 single-chip microcomputer .It is a part of the
whole design that cannot be lacked. The system is used to
collect and control temperature in real time.In this paper,
it gives the system implementation of hardware and program
designing. The experimental tests show that this high
accuracy, strong anti-interference ability, alarm timely and
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