【正文】
( ek ek 1 ) + K 1 ek + K D ( ek 2ek 1 + ek 2 ) . However, if this algorithm was used directly, it could generate a lare overshoot and cause integral saturation easily when starup, stop or adjust substantially. In order to inhibit the emergence of this phenomenon, we use integral separation as an improvement. Integral separation won39。 temperature acquisition。 ) (School of Information and Electrical Engineering, Shandong University of Science and Technology, Qingdao 266510, China) Abstractthis paper introduced a thermo tank temperature control system based on STM32, Firstly, the temperature acquisition is realized by the highprecision electrical bridge based on constant current source. Then the augmented PID algorithm realized by software is adopted Butterworth filter is used to convert the output PWM of STM32 to current signal which is used to control the semiconductor control rectifier to adjust the temperature. Calibration check and practical application both indicated that the system was reliable, highprecision, practicable and could meet reality needs. Key wordsSTM32。 ), Yu RUI( ), Xu ZHANG( ), Zhengzhong GAO( ) , Shiguang LI(Thermo Tank Temperature Control System Based On STM32 Biao QIU( thermo tank。 PID ManuscriptNumber: 16748042(2020)01006403 Dio: 1 introduction Thermo tank can be divided into low temperature thermo tank and high temperature thermo tank according to temperature range. Heating control thermo tank is one kind of high temperature thermo tank and has a wide range of applications in industrial, medical and scientific areas. As some special thermo tank control system require high precision in temperature acquisition and control, the system designed in this paper can measure temperatures from 16℃ to 80℃ and its precision is superior to 177。t work until actual temperature is approaching the settings. When it works, it can eliminate static error and improve precision[5]. Block diagram of integral separation PID is shown in . Fig 4 Integral separate PID algorithm block diagram Touch screen software design It makes humanputer interface much more friendly, more convenient and faster by using touch screen. Use dedicated control chip ADS7843 to connect AMT9532, fourwire resistive touch screen, withSTM32F103, process the touch screen signals[6]. Touch screen39。 ℃ . The application shows that this system has the realtime, flexible, stable highprecision, and low cost advantages, and can meet the industrial requirements of high accuracy, high stability and reliability. References [1] Z