Door Sensor Wireless Proximity Detection
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Solution Overview
Problem
Existing security systems cannot accurately detect the distance or moving direction of a wireless device from a wireless receiver, leading to the need for entry delays or indicators to ensure safe entry into secured premises.
Innovation Solution
A door-mounted contact sensor with a wireless radio and processor that receives a broadcast message from a wireless device, determines if the device is authorized and if signal parameters (such as distance or direction) meet preconfigured access conditions, allowing for precise activation of security actions like unlocking doors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If known security systems detect wireless device connection, then device identification is achieved, but distance and moving direction detection capability is lost
Solution Approach 1:
The patent replaces traditional mechanical proximity sensors with wireless signal-based detection. The wireless receiver captures broadcast signals from wireless devices, and the processor analyzes signal parameters (strength, timing) to determine distance and moving direction without physical contact or additional hardware sensors.
Solution Approach 2:
The patent introduces the wireless broadcast signal as an intermediary carrier that conveys device identification and spatial information. The signal acts as a mediator between the wireless device and the security system, enabling the receiver to extract distance and direction data without direct device interaction.
2Reliability
If entry delay is implemented to ensure safe entry, then security is improved, but user convenience deteriorates
Solution Approach 1:
The patent implements dynamic security response based on real-time device position and motion analysis. Instead of a fixed entry delay, the system continuously monitors signal parameters and adjusts security actions dynamically - granting immediate access when devices approach from authorized directions at appropriate distances, and applying delays or restrictions when motion patterns suggest unauthorized access attempts.
Solution Approach 2:
The patent changes security system parameters (access grant timing, lock/unlock commands) based on varying signal parameters (strength, direction, movement velocity). The processor analyzes these parameters to determine whether to apply entry delay or grant immediate access, making security response adaptive rather than static.
3Reliability
If indicator showing safe entry time is added, then security reliability is improved, but device complexity increases
Solution Approach 1:
The patent makes the wireless receiver multi-functional by enabling it to perform both device identification and spatial analysis (distance and direction detection) using the same hardware components. The processor similarly handles multiple tasks including signal analysis, authorization verification, and security action determination, eliminating the need for separate indicator devices or additional sensors.
Data Source
AI summary
Systems and methods for activating a security action responsive to proximal detection and identification of a wireless device are provided. Such systems and methods can include a wireless radio of a door mounted contact sensor of a security system receiving a broadcast message that includes a device identifier from the wireless device. Then, such systems and methods can include determining whether the device identifier corresponds to any of a plurality of authorized devices enrolled with the security system, determining whether a signal parameter of the broadcast message satisfies a preconfigured access condition, and responsive thereto, performing the security action.