Design and hardware development of power window control mechanism using microcontroller

Abstract

The research paper emphasizes on the design and real time implementation of microcontroller based power window control used as a control system for moving a power window panel. The purpose of power window control system is to raise and lower door glass with the help of a switch and its operation is controlled by the use of following sensors LPG sensor, LDR sensor and position sensor to replace the use of hand-turned crank handle. Power window system consists of driver motor, power electronic and control system. The control unit senses both hard and soft obstructions and deactivates a motor that moves the glass when any obstruction is detected. The controller also senses obstructions on start-up of the motor and regulates the speed of the window panel by pulse width modulating motor signals. In other way the controller senses obstructions by maintaining data which is related to motor operation in three different memory buffers that are regularly updated upon receipt of pulses that are related to motor speed. The whole system can be designed as an intelligent control system by applying number of conditions which results to the movement of the power window. It increases the safety of the automobile as well as increases human comfort inside the vehicle. Such applications are fire safety in the vehicle, over temperature detection, sensing of LPG leakage. Hardware implementation includes some basic input switches, sensors connected to the microcontroller and the LEDs and LCD are used to show the status of output. Input sensors used for this research are LPG sensor, LDR sensor and position sensor, output is the functioning of the motor. The implementation work is carried out using AVR ATMEGA 16 microcontroller.