Design of Water Temperature Automotive Control System Based on AVR
Abstract
This paper introduces the design and realization of the automotive water temperature control system basing on AVR. It has the function of setting, display signal in real time and upper communication. The temperature measurement precision is 0.3℃、and the heat preservation precision is positive and negative 0.5℃、range of temperature control is 0~100℃.
This system adopt ATmega16 SCM as a main controller, The temperature gathering aspect uses the LM35 sensor. It has the very high work precision and the wide linearity operating region. Moreover small, low power loss, reliability high, low cost. It use GTJ3-10A solid-state relay in the part of power output, the circuits are economic and reliable. The controllability and precision is well under the control of PWM. It makes system with quick response and lower over swing while using PID arithmetic as the control arithmetic. After the validation of experiment, this system has well reliable and stability. Then realize the setting of temperature and collecting of temperature in real time and painting.
Key Words:Temperature Control ATmega16 Single Chip Computer
PID Arithmetic PWM