As the development of science and industry, temperature measure technology improves and verifies quickly. Because the range of temperature becomes wide, to satisfy different needs, different temperature sensors were made. Such as Gas thermometer, resistor thermometer, metal thermometer, Semiconductor thermometer, High temperature thermometer , colorimetric thermometer and radiation thermometer etc.
This article introduced a temperature measurement method with AT89S51 and DS18B20. I use DS18B20 to accomplish temperature measurement and imitate-digital conversion, then DS18B20 transmit the temperature information to AT89S51 by 1-wire data transmission. Last, 1602 LCD display these information. This system can realize temperature display, temperature warning and clock. The system has a simple structure, and mature component processing. It is cheap and practical and has certain promoted value.
Keyword: the temperature sensing, DS18B20, 1-wire data transmission, the liquid-crystal display