When fast gas chromatography（ GC） in temperature programming

due to the characteristics of chromatographic columns with low heat capacity

linearity and overshoot of warming up are difficult to control

affect repeat ability of instrument

resulting in overlapping peaks. In order to solve this problem

a kind of temperature control system based on intelligent PID algorithm is developed. The system selects LTM column

with the platinum temperature measuring wire as temperature sensor component

the temperature acquisition and control circuit is designed. On the basis of incremental PID

target temperature segment is divided into several sub regions

and the temperature compensation is introduced. The compensation value is linear with the heating rate.The experimental results show that the error of the temperature rising rate after compensation is 2. 58 %

the linearity is 99. 92 %

and the overshoot is less than 3 ℃

which meets the requirement of the system.