Simulation Optimization of Airflow Level Posture Sensor

In this paper, using the optimization method of replacing the temperature with power to calculate the temperature distribution of the airflow level posture sensor in closed cavity. The temperature distribution of sensor in closed cavity is calculated at different inclination sensor status and under different environmental temperatures. Calculation results and experimental verification show that the two thermal resistance difference of airflow level posture sensor has good linear relationship with the inclination, and the change rate is 2.6183 K/o. The environment temperature affection on sensors´ two thermistor´s resistance difference also has a linear relationship, when the tilt is 24o the change rate is-0.1359K/K. It has a good similarity with the experimental, and provides a theoretical basis for designing airflow level posture sensor.