Smart Door Lock with Multi-Modal Presence Detection
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Solution Overview
Problem
Existing door systems lack efficient and convenient methods for automatically unlocking and opening doors based on user presence, often relying on manual operation or limited sensing technologies.
Innovation Solution
A door system that utilizes pressure sensors, ultrasonic receivers, infrared receivers, and audio receivers to detect user presence, transitioning the lock from a locked to an unlocked configuration and moving the door panel from a closed to an ajar position using linear actuators, motorized strike plates, or electromagnetic mechanisms, while authenticating the user through signals from remote devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual door operation is used, then device complexity is reduced, but ease of operation deteriorates due to lack of automatic user detection and authentication
Solution Approach 1:
The door system automatically detects user presence through pressure sensors, ultrasonic receivers, infrared receivers, or audio receivers, authenticates the user, and operates the door without manual intervention. The system serves itself by autonomously completing the entire door operation sequence based on sensed user presence and authentication results.
Solution Approach 2:
The patent replaces manual mechanical door operation with automated sensing and actuation systems. Pressure sensors, ultrasonic receivers, infrared receivers, and audio receivers detect user presence, while linear actuators, motorized strike plates, electromagnetic mechanisms, or electronic hinges replace manual door opening actions.
2Measurement precision
If multiple sensing technologies are integrated, then measurement precision of user presence detection is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple sensing technologies (pressure sensors, ultrasonic receivers, infrared receivers, audio receivers) into a unified door system. These diverse sensors merge their detection capabilities to accurately identify user presence through different physical modalities, creating a robust multi-sensory authentication system.
Solution Approach 2:
The door system incorporates multiple types of sensors that can detect user presence through various mechanisms (pressure, sound waves, infrared radiation, audio signals). This multi-functional sensing approach allows the system to operate reliably under different conditions and user behaviors.
3Productivity
If automatic lock transition and door opening are implemented, then productivity of door operation is improved, but reliability of secure access deteriorates without proper authentication
Solution Approach 1:
The system performs preliminary authentication of the user before transitioning the lock from locked to unlocked configuration. The authentication process (using pressure sensors, ultrasonic receivers, infrared receivers, or audio receivers) occurs in advance, ensuring that only authenticated users can trigger the automatic door opening sequence.
Solution Approach 2:
The door system uses feedback from multiple sensors to continuously monitor user presence and authentication status. The lock transition and door opening actions are controlled based on real-time feedback from the sensing system, ensuring that automatic operation only occurs when authentication is verified.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables secure and convenient automatic door operation, allowing users to enter without manual handling, enhancing security and user experience by integrating advanced sensing technologies for precise user detection and authentication.
Implementation Method 1
receiving a signal from a pressure sensor disposed in a sill or a frame of the door system
Implementation Method 2
receiving the signal from an ultrasonic receiver
Implementation Method 3
receiving the signal from an infaRed receiver
Implementation Method 4
receiving the signal from an audio receiver
Implementation Method 5
a linear actuator, a motorized strike plate, an electromagnetic mechanism, or an electronic hinge that move the door panel from the closed position to the ajar position
Implementation Method 6
a linear actuator, a motorized strike plate, an electromagnetic mechanism, or an electronic hinge that move the door panel from the closed position to the ajar position
Data Source
AI summary
A method of operating a door system includes sensing a user on an exterior side of a door panel in physical propinquity to the lock such that the lock transitions from a sleep state to an active state, authenticating the user when the lock is in the active state before converting the lock from a locked configuration to an unlocked configuration, and converting the lock from the locked configuration to the unlocked configuration in response to transition to the active state. Authenticating the user includes receiving an authentication signal from a remote device on the user in physical propinquity to the to the lock.