Patternized Secret Knock Detecting Smart Door Lock System

Dr. P.A.Harsha Vardhini, P Pavan Kumar, M. Sreya Bhavani, B. Prasanna, B. Tapan Kumar and M. Bhargav
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Dr. P.A.Harsha Vardhini: Department of ECE, Vignan Institute of Technology & Science, Yadadri, Bhuvanagiri Dist., India
P Pavan Kumar: Department of ECE, Vignan Institute of Technology & Science, Yadadri, Bhuvanagiri Dist., India
M. Sreya Bhavani: UG Student, Department of ECE, Vignan Institute of Technology & Science, Yadadri, Bhuvanagiri Dist., India
B. Prasanna: UG Student, Department of ECE, Vignan Institute of Technology & Science, Yadadri, Bhuvanagiri Dist., India
B. Tapan Kumar: UG Student, Department of ECE, Vignan Institute of Technology & Science, Yadadri, Bhuvanagiri Dist., India
M. Bhargav: UG Student, Department of ECE, Vignan Institute of Technology & Science, Yadadri, Bhuvanagiri Dist., India

International Journal of Latest Technology in Engineering, Management & Applied Science, 2025, vol. 14, issue 5, 725-728

Abstract: The Patternized Secret Knock Detecting Door Lock is an advanced security solution that combines simplicity and innovation by using acoustic signal recognition for access control. This system captures vibrations from knocks using a piezoelectric sensor, processes them through a microcontroller, and compares the detected pattern with a pre-programmed secret knock. Only when the knock sequence matches is the lock mechanism activated, ensuring secure and personalized access. The design is user-friendly, allowing customization of knock patterns and providing an alternative to traditional locks or keypads. It prioritizes energy efficiency, ease of installation, and resistance to tampering or false triggers. By eliminating the need for physical keys or cards, this solution minimizes the risk of unauthorized duplication and offers a discreet, reliable locking mechanism suitable for homes, offices, and restricted areas. The work highlights the practical application of embedded systems and signal processing in modern access control technologies.

Date: 2025
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