A Control Technology of Temperature for Severe Precision
Yao Gen-he · Journal of Huaihua University · 2007
The temperature control subsystem using platinum resistance as sensor for increasing the relativity between the resistance and the temperature adopts four-lead connect method to eliminate the influence from the resistance of the leads and the switchs of multicircuit.Adopting the unitary parameter tuning method,the only self-tuning parameter can be obtained by computing under the ITAE index.The increment can be achieved in the procedure of running PID program and the output is the total voltage which will be converted into the time of heating later.The time of heating is transformed into the heating state of a period.Following the heating state,the temperature control subsystem can adjust the temperature of CCD camera.The precision of control by using self-tuning parameter method is in excess of ±0.1℃.