Nowadays, temperature-measuring apparatus in the market only can check and measure the temperature of one point, and the temperature information is not real-time and the precision is low. It takes a great of troubles for the industry-controllers to make decision. In this situation, it is very necessary to develop a measuring system which not only can measure several points with high real time and high accuracy, not also can handle the multiple-point’s temperature comprehensively.
Therefore, this system is designed with Micro-Controller system as the core, which can realize real-time inspection of multiple-point’s temperature. This system takes AT89C51 as core, namely main controlling part. And the function of multiple-point’s temperature measurement is realized by DS18B20. As a kind of high-accuracy digital net temperature sensor，DS18 B20 can be used building a sensor net easily. It can also make the net simple and reliable with it's special 1-wire interface. Thus, I believe that the system has a good application prospect in the circumstances such as grain depots, intelligent building, central air-conditioning, which need multiple-point’s temperature measurement.
Keywords: temperature, Multiple-Point’s Measure, Micro Controller Unit, DS18B20
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