3D Sensor Partial Area Illumination for Energy Efficiency
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Solution Overview
Problem
Existing 3D monitoring sensors for automatic doors and gates lack efficiency in detecting objects and providing accurate hazard signaling, with limitations in signal recognition and energy usage due to uniform illumination of large areas.
Innovation Solution
A time-of-flight 3D sensor design that concentrates light intensity on specific partial areas within a spatial section, using a light source and reception matrix to determine distances and detect objects, with adjustable illumination patterns and energy-saving features, such as discrete illumination and the use of a Fresnel lens for focused radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source illuminates the entire spatial section uniformly, then the coverage area is maximized, but the light intensity per unit area is reduced and energy consumption increases
Solution Approach 1:
The spatial section to be monitored is divided into multiple partial areas, each illuminated by dedicated illumination sources. This segmentation allows concentrated light delivery to specific zones rather than diffuse illumination across the entire space, thereby increasing light intensity per unit area while reducing total energy consumption by only illuminating necessary regions.
Solution Approach 2:
Different regions of the spatial section are provided with different illumination characteristics. The patent applies illumination sources selectively to specific partial areas based on monitoring requirements, creating local quality variations where some areas receive high-intensity focused light while others receive no illumination, optimizing both intensity and energy efficiency.
2Measurement precision
If the light source concentrates illumination on a partial area, then the light intensity and signal recognition are improved, but the coverage area is reduced
Solution Approach 1:
The monitoring space is segmented into multiple partial areas, each with dedicated illumination sources. This allows the system to maintain high light intensity and signal recognition accuracy within each partial area while collectively covering the entire spatial section through the combination of multiple segments.
Solution Approach 2:
Multiple partial areas with concentrated illumination are merged to form complete coverage of the spatial section. By combining several focused illumination zones, the system achieves both high local intensity for accurate measurement and comprehensive area coverage.
3Reliability
If the light source operates continuously with high power, then the detection reliability is maintained, but the waste heat and energy loss increase
Solution Approach 1:
Instead of continuous operation, illumination sources are activated periodically or on-demand based on detection needs. The control device can switch between different illumination patterns or activate only specific partial areas when objects are detected, maintaining detection reliability while significantly reducing continuous energy consumption and waste heat generation.
Solution Approach 2:
The system applies partial illumination action by activating only the necessary partial areas rather than the entire spatial section. This selective activation maintains sufficient detection capability in critical zones while reducing overall energy consumption and associated waste heat.
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
This design enhances signal recognition and switching sensitivity, increases the sensor's range, reduces energy consumption and waste heat, and extends the sensor's service life, while allowing for precise monitoring and hazard signaling with improved accuracy and flexibility.
Implementation Method 1
a reception matrix (9, 10) which is suitable for receiving a complete image of light reflected from surfaces
Implementation Method 2
an evaluation device (12) for determining the distance between the surfaces from the receiving matrix
Implementation Method 3
a common Fresnel lens (7) is provided for this purpose, through which the radiation emitted by the illumination sources is focused into the spatial section
Implementation Method 4
focusing means can be provided for the light source, particularly preferably for each illumination source
Data Source
AI summary
3D sensor for controlling a control process with a light source having at least one illumination source, a receiving matrix suitable for receiving a complete image of light reflected from surfaces of a spatial section, an evaluation device for determining the distance of the surfaces from the receiving matrix, and a control device for detecting an object, characterized in that the light source illuminates a partial area of the spatial section which has at least one gap.