PIR Sensor-based Secured Automatic Door Opener
Keywords:
AT89C51 microcontroller, Automated door opening, 4×4 matrix keyboard, Passive infrared ray sensor, Quartz crystal, Security-based door openingAbstract
In many places, such as hospitals, offices and residential buildings, manually operated doors can pose inconvenience, security risk and hygiene concerns. This paper aims to address these challenges by designing a PIR sensor-based automatic door opener using an 8051 microcontroller and a 4 × 4 matrix keyboard for authentication. When a person comes nearer to the entrance of the door, the infrared rays produced by the human are sensed by the PIR sensor, which activates the keyboard to enter the password to open or close the door automatically. The password which is entered is compared with the stored password in the processing unit. If the entered password is correct, then the system opens the door by rotating the motor connected to the door. If the password entered is wrong, then the door remains closed. This system is an efficient solution for disabled persons for operating the secured applications through real-time implementation of door access in hospitals, shopping malls, libraries.
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