Motion Detection Light Structure for Video Intrusion Analysis
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Solution Overview
Problem
Outdoor intrusion detection systems face challenges with limited detection distance, high false alarm rates, and high costs, especially in dark environments, where existing technologies struggle to differentiate between real threats and false alarms.
Innovation Solution
A low-cost video motion detection system using a conventional video camera with a motion detection light structure that projects a multi-cone light pattern, allowing for effective motion detection and threat assessment in total darkness with a low false alarm rate, and capable of operating in both indoor and outdoor environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional video cameras are used for night vision, then motion detection can be performed, but adequate light must be added which increases cost and power consumption
Solution Approach 1:
The system uses periodic pulsed illumination instead of continuous light. The controller activates the light source only during specific time intervals to illuminate the scene for video capture, then turns it off. This periodic action dramatically reduces power consumption while maintaining adequate visibility for motion detection during the illuminated periods.
Solution Approach 2:
The system uses reflected ambient light (moonlight, starlight, pollution light) rather than requiring an active light source. The scene naturally provides its own illumination through reflected light, and the camera captures motion based on these ambient conditions without needing additional power-intensive lighting.
2Illumination intensity
If thermal security cameras are used for night vision, then motion detection in total darkness is possible, but the cost is extremely high
Solution Approach 1:
The system replaces expensive thermal imaging cameras with inexpensive conventional video cameras. While conventional cameras have limitations in total darkness, the system compensates by using reflected ambient light and pulsed illumination, achieving acceptable night vision performance at a fraction of the cost of thermal cameras.
Solution Approach 2:
The system changes the operational parameters of conventional cameras to enhance night vision performance. This includes adjusting sensitivity settings, using pulsed illumination timing, and optimizing the light source characteristics to maximize the use of reflected ambient light, thereby achieving thermal-camera-like night vision capability with standard equipment.
3Illumination intensity
If light is added to increase visibility for motion detection, then motion detection in dark environments improves, but environmental pollution and insect attraction increase
Solution Approach 1:
The light source operates in pulsed intervals rather than continuously. During the illuminated periods, visibility is adequate for motion detection. During the dark periods, the system is invisible to insects and does not create light pollution. This periodic operation eliminates the continuous harmful effects while maintaining detection capability when needed.
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 system provides reliable intrusion detection and threat verification with a low false alarm rate, long detection range, and low power consumption, while being resistant to environmental factors and installation vulnerabilities, without sacrificing image detail or color quality.
Implementation Method 1
motion detection light structure including a light source and a reflector operatively associated with the light source to project the light pattern into the space
Implementation Method 2
video motion detecting structure including a video camera having a field of view including at least some of the light pattern to detect intrusion into the light pattern
Data Source
AI summary
A system for detecting intrusion into a space which includes motion detection light structure for producing and projecting a light pattern formed by a plurality of light beams of a certain character into a space and video motion detecting structure including a video camera having a field of view including at least some of the light pattern to detect intrusion into the light pattern. When motion is detected, images of the video camera are transmitted for threat assessment, and a scene illumination light is activated to improve visibility during nighttime operation.