Infrared Sensor Segmentation for Luminance Control
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Solution Overview
Problem
Conventional illuminating devices equipped with PIR or microwave sensors cannot effectively control luminance for immobile humans, as these sensors only detect moving humans, leading to inadequate lighting adjustments.
Innovation Solution
A method utilizing an infrared sensor with a segmented detection region, where different luminance settings are applied based on human presence in distinct areas, with higher luminance for closer proximity and lower luminance for absence, allowing for dynamic adjustment of lighting levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PIR or microwave sensors are used to detect human presence, then moving human detection is improved, but immobile human detection capability deteriorates
Solution Approach 1:
The detection region is segmented into multiple zones (first region closer to sensor, second region farther away) with different luminance settings. This segmentation allows the system to differentiate between various human presence scenarios and apply appropriate lighting strategies for both moving and immobile humans.
Solution Approach 2:
Different luminance levels are applied to different spatial regions. The first region receives a first luminance level while the second region receives a second luminance level, creating localized lighting quality that adapts to human presence patterns and improves detection reliability for various scenarios.
2Device complexity
If single luminance level is applied for all detection regions, then device complexity is reduced, but lighting adaptability deteriorates
Solution Approach 1:
The detection region is divided into multiple zones (first region and second region) with distinct luminance assignments. This segmentation enables the system to provide differentiated lighting responses for different spatial locations, enhancing adaptability while maintaining relatively simple control logic.
Solution Approach 2:
Different luminance levels are assigned to different spatial regions based on human presence detection. The system applies local quality variations in lighting to match human needs in different areas, improving versatility without significantly increasing device complexity.
3Illumination intensity
If higher luminance is applied for closer human presence, then illumination effectiveness is improved, but energy consumption increases
Solution Approach 1:
The system applies different luminance levels to different spatial regions based on human presence. Closer regions (first region) receive higher luminance when humans are detected, while farther regions (second region) receive lower luminance, optimizing illumination effectiveness while reducing overall energy consumption.
Solution Approach 2:
The luminance parameter is dynamically changed based on human presence detection and spatial location. The system adjusts luminance levels between different regions and states, optimizing the balance between illumination effectiveness and energy consumption through parameter variation.
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 precise control of illuminance levels based on human presence, ensuring optimal lighting for both mobile and immobile individuals, enhancing comfort and energy efficiency.
Implementation Method 1
human presence is detected in the proximity of an infrared sensor
Data Source
AI summary
In determining luminance, a location of human presence is referred. An infrared sensor detects the human presence in its proximity. The infrared sensor's effective detecting region includes a first region and a second region. The first region is farther from the infrared sensor than the second region is. And the first region surrounds the second region. Second, a first luminance is set for human presence within the first region; a second luminance is set for human presence within the second region; and a third luminance is set for nonoccurrence of human presence within both the first region and the second region. In addition, the second luminance is higher than the first illuminance, and the first illuminance is higher than the third illuminance. Third, an illuminating device is activated by applying the first luminance, the second luminance, or the third luminance, in response to a location of the detected human presence.