Image Sensor Terminal with Photosensitive Filter for Building Monitoring
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Solution Overview
Problem
Ambient light density variations in buildings lead to inaccurate image information capture by image sensor terminals, affecting the reliability of building management systems, such as air conditioning, evacuation, and elevator control systems.
Innovation Solution
The image sensor terminal incorporates a photosensitive filter and light-transmitting layer, along with a light density sensing component and auxiliary light source, to maintain consistent photosensitive conditions and enhance image accuracy across varying light densities, and is connected to a building management system for improved data analysis and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image sensor terminals are used to capture image information in various building positions, then video image information can be collected for building management, but the varying ambient light density causes inaccurate image capture and analysis
Solution Approach 1:
A photosensitive filter layer is introduced as an intermediary component between the lens element and the image sensor. This filter layer selectively transmits or blocks light based on its photosensitive properties, mediating the effect of ambient light density variations on the image sensor and enabling accurate image capture across different lighting conditions
Solution Approach 2:
The patent utilizes the photosensitive properties of the filter layer to dynamically change its optical parameters (light transmission characteristics) in response to ambient light conditions. This parameter change mechanism allows the system to maintain consistent image quality despite variations in external lighting environments
2Measurement precision
If circuit processing capability of the image sensor is enhanced to improve image accuracy, then image information can be captured more accurately, but the solution has certain limitations under extreme light density variations
Solution Approach 1:
Instead of relying solely on post-capture circuit processing, the patent introduces a photosensitive filter layer as a physical intermediary that pre-processes light before it reaches the sensor. This approach provides adaptability to extreme light conditions by optically adjusting light transmission at the source level, complementing or replacing the need for extensive circuit processing adjustments
3Quantity of substance
If multiple image sensor terminals are deployed throughout the building, then comprehensive site status information can be collected, but inconsistent ambient light densities at different positions result in inconsistent image quality across terminals
Solution Approach 1:
The patent applies a photosensitive filter layer locally at each image sensor terminal, tailored to address the specific lighting conditions at that position. This local quality enhancement ensures that each terminal independently compensates for its ambient light density variations, resulting in consistent image quality across all deployed terminals throughout the building
Solution Approach 2:
The photosensitive filter layer serves multiple functions: it improves image accuracy under varying light conditions, enables consistent performance across different terminal positions, and reduces the need for extensive circuit processing. This multi-functionality makes the solution universally applicable to all image sensor terminals in the building
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 solution ensures more accurate and consistent image information capture, reducing errors in human presence detection and enhancing the scientific accuracy of building control systems under different ambient light conditions.
Implementation Method 1
a photosensitive filter and light-transmitting layer disposed at a light incoming side of the lens element
Implementation Method 2
a light density sensing component disposed between the lens element and the photosensitive filter and light-transmitting layer
Data Source
AI summary
An image sensor terminal and a building management system, and belongs to the field of building intelligent management technologies. The image sensor terminal includes an image sensor and a lens element, and further includes: a photosensitive filter and light-transmitting layer disposed at a light incoming side of the lens element; and the image sensor terminal is further provided with a mounting portion for fixing the image sensor terminal into a building. A building management system uses a plurality of the image sensor terminals. Image information acquired by the image sensor terminal under strong light conditions is more accurate, and image information acquired under different ambient light density conditions is more consistent. The control of the building management system under different ambient light density conditions has better accuracy.