Design of  temperature measurement circuit for rotational heated roller

DU Jiawei, YANG Peng, SHI Wangwang

(School of Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China)

Abstract: Aiming at increasing the accuracy and reliability of the measurement and simplifying the system, a design proposal of the corresponding measurement circuit for the industrial heated roller was introduced. After analyzing of measurement principles, the design proposals based on DSP, PWM technology and related signal processing circuit were introduced. The measurement circuit, designed as a circular PCB, is installed on the spindle of the heated roller and rotated with the roller while realtime temperature signal was collected. Temperature was calculated through the duty of the PWM signal according to the linear relationship between the two parameters. The circuit was controlled through DSP. The correctness and feasibleness of the proposal were demonstrated through the experiments. The results indicate that the design proposal can meet the requirement of temperature measurement for industrial rotational heated roller on accuracy and reliability, improve performance and have certain reference value.

Key words: rotational heated roller; PWM; DSP; temperature measurement