SHI Changhua, HUANG Xinhua

（Jindezhen Comprehensive College, Jingdezeh Jiangxi 333000, China）

Abstract:Temperature measurement of a kiln is one of the key technologies in ceramic industry. The temperature data can be transmitted by wireless communication module nRF2401, and simultaneously double-colored lattice 16×64LED will display the temperature of a kiln in real time in the distance. Such measurement will hardly interfere with the loading and unloading of a kiln in the course of production. MAX31855 is a cold-junction compensated thermocouple-to-digital converter with the thermocouple accuracy of less than ±6℃ for temperatures ranging from 0℃ to 1300℃, and the accuracy can be increased to less than ±1℃ through the sectional temperature compensation by a subprogram. The wireless temperature measurement and LED lattice display system for ceramic kiln are accurate when used in firing, so they have good practical value.

Key words:microcontroller; thermocouple; MAX31855; nRF240; LED lattice