Abstract:

In view of the disadvantage of high temperature thermometer such as large size,high cost,complex operation,and dependence on computer in actual measurement,this paper studies the temperature data collection,transmission and display,designs a high temperature thermometer with STC89C52 as its core and with platinum resistor based on Pt100 temperature sensor and liquid crystal display 1602.The thermometer has a measurement range of -200 ℃~+500 ℃ with an accuracy of 1 ℃.Experiment results show that the high temperature thermometer has great temperature measuring range,stable performance,reliable operation,expansion ability and independence from computers.

Key words: temperature;sensor;liquid crystal display;table Lookup