Rotatable Light Housings for Home Security Monitoring
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Solution Overview
Problem
Home security systems with limited fields of view (FoV) fail to adequately monitor environments due to restricted motion detection capabilities, leading to potential undetected intrusions.
Innovation Solution
A device equipped with a camera assembly and passive infrared (PIR) sensors, featuring a Fresnel lens array to enhance the field of view, allowing for improved motion detection and video capture, with adjustable illumination and audio capabilities, enabling comprehensive environmental monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single fixed camera and sensor system is used, then the device structure is simple, but the field of view is limited and motion detection coverage is insufficient
Solution Approach 1:
The camera assembly and light assemblies are made rotatable about a vertical axis through rotational coupling mechanisms, allowing the system to dynamically change its field of view and monitor multiple directions sequentially, transforming a static limited-coverage system into a dynamic multi-directional monitoring system
Solution Approach 2:
The device divides the monitoring task into multiple segments by using separate camera assemblies and light assemblies that can be independently rotated to different positions, with each assembly covering a specific angular sector, thereby achieving complete 360-degree coverage through coordinated segmentation
2Reliability
If motion sensors with limited field of view are used, then the device complexity is low, but motion detection capability is insufficient and intrusions may be undetected
Solution Approach 1:
The sensor system uses rotational mechanisms to dynamically sweep the camera and PIR sensors across different angular positions, allowing the limited-field-of-view sensors to collectively cover a complete 360-degree area over time, thereby improving detection reliability without requiring multiple fixed sensor arrays
Solution Approach 2:
The rotational system operates continuously or in repeated cycles to sweep the sensors across the entire monitoring area, ensuring that no intrusion goes undetected as the system persistently scans all directions, maintaining continuous useful action for comprehensive coverage
3Area of stationary object
If multiple light assemblies are used to improve coverage, then the monitoring area increases, but the device complexity and adjustment difficulty increase
Solution Approach 1:
Multiple light assemblies are merged into a single rotatable unit that houses both the camera and PIR sensors, allowing all components to be adjusted together as one integrated assembly rather than separately, thereby reducing adjustment complexity while maintaining multi-directional coverage capability
Solution Approach 2:
The rotatable design allows a single dynamic adjustment of the entire assembly to change the monitoring direction for all components simultaneously, replacing the need for multiple static adjustments of separate fixed components, thereby improving ease of operation while expanding monitoring area
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
The device provides enhanced motion detection and monitoring capabilities, allowing for accurate detection of objects at various distances and preventing signal cancellation, thereby improving security and reliability.
Implementation Method 1
A device equipped with a camera assembly and passive infrared (PIR) sensors, featuring a Fresnel lens array to enhance the field of view
Implementation Method 2
passive infrared (PIR) sensors, allowing for improved motion detection and video capture
Data Source
AI summary
A device including a mount, a first arm coupled to the mount, and a second arm coupled to the mount. The first arm includes first teeth and the second arm includes second teeth. A first light assembly rotationally couples to the first arm, and includes a first coupler that engages with the first teeth. A second light assembly rotationally couples to the second arm, and includes a second coupler that engages with the second teeth. A camera assembly pivotably couples to the mount, and includes a camera, a first passive infrared (PIR) sensor, and a second PIR sensor.