RESEARCH ON THE APPLICATION OF PID ALGORITHM BASED ON ARDUINO IN TEMPERATURE MEASUREMENT AND CONTROL EXPERIMENT

As one of the most basic physical scalar, temperature is of great significance both in frontier scientific research and daily life. In this experiment, a kind of 3D printing nozzle is used as the control object, and the temperature is collected in real-time and quickly by the temperature measuring circuit composed of K-type thermocouple and LM35. The temperature data collected is processed using a PID algorithm with an Arduino UNO microcontroller, and based on the calculated results, a PWM signal is output to control the heating circuit, thereby achieving stable temperature measurement and control. Compared to the traditional control circuit, the closed-loop PID algorithm can stabilize the controlled object at the set temperature, eliminating the phenomena of temperature overshoot and drift.