基于PT100的矿井通风机温度巡检仪设计

Platinic resistance is designed and manufactured by the basic principle of platinum resistance changes with the temperature\'s changing.According to the resistance at 0 ℃ R (℃),we divided it into 10 ohms (sub-degree No. Pt10) and 100 ohms (sub-degree number Pt100). temperature range -200 ~ 850 ℃.100 ohm platinum resistance is mainly used for temperature below 650 ℃ area, although can also be used for more than 650 ℃ temperature zone, more than 650 ℃ temperature zone does not allow A-level error. Therefore, the following temperature range 650 ℃ temperature should be 100 Ohm platinum resistance selection.Pt100 platinum resistance temperature characteristics and the general principles of temperature measurement using Pt100 are introduced, Then design a kind of coal mine fan temperature patrol instrument using PT100,This system uses two pieces of MCU W77E58 to work in parallel, achieves the goal of 16 channels temperature cycle detection and temperature warning while over limit, meets the needs of multi-sites online temperature monitoring in the coal mine.