Optical Sensing System With Adjustable Detecting Region
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Solution Overview
Problem
Conventional optical sensing systems inaccurately detect hand location due to the presence of arms, leading to reduced effective detection areas and potential triggering of undesired functions in upper regions of the detecting region.
Innovation Solution
An optical sensing system with adjustable upper half region size, utilizing a first and second light source and an optical sensor to measure distances between the hand and arm, and adjust the detecting region accordingly to minimize arm interference in hand location calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the detecting region includes the upper half region where arm images are captured, then the hand location can be detected in upper positions, but the calculated centroid deviates from the real centroid due to arm interference
Solution Approach 1:
The detecting region is divided into an upper half region and a lower half region. The system segments the image data accordingly and selectively adjusts the effective detecting region based on arm detection, allowing accurate hand location calculation by excluding arm-contaminated upper regions when necessary.
Solution Approach 2:
The size of the effective detecting region is dynamically adjustable. The system automatically adjusts the detecting region size based on the detected arm size and position, making the detection region larger when no arm is present and smaller when arm interference is detected, thereby maintaining measurement precision under varying conditions.
2Area of stationary object
If the detecting region size is fixed, then the system structure is simple, but the effective detection area is reduced due to arm interference in upper regions
Solution Approach 1:
The detecting region size is made dynamically adjustable rather than fixed. The system automatically modifies the effective detection area based on real-time arm detection, maximizing the usable detection area when conditions permit while maintaining simplicity in normal operation modes.
Solution Approach 2:
The system performs self-adjustment of the detecting region based on its own detection of arm presence. The control unit automatically determines when to adjust the detection region size based on arm size detection, eliminating the need for external intervention or complex manual configuration.
3Measurement precision
If the detecting region is adjusted based on arm size, then hand location accuracy is improved, but the system complexity increases
Solution Approach 1:
The system segments image processing into distinct stages: initial image capture, arm region detection, hand region identification, and centroid calculation. This segmentation allows the complex task of accurate hand location detection to be broken down into manageable steps, improving precision while controlling system complexity through modular processing.
Solution Approach 2:
The system performs preliminary detection of arm size and position before proceeding to hand location calculation. By detecting and characterizing the arm region first, the system can pre-adjust the detecting region parameters, ensuring that subsequent hand location calculations are performed on a clean, arm-free detection area, thereby improving accuracy.
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 effectively reduces arm interference in hand location detection, ensuring accurate hand positioning and preventing undesired function triggering by dynamically adjusting the detecting region based on sensed arm size.
Implementation Method 1
an optical sensor, configured to sense optical data generated based on at least one of the first light source and the second light source
Data Source
AI summary
An optical sensing system, comprising: a first light source, configured to emit first light to a first position; a second light source, configured to emit second light to a second position, wherein the first position is above the second position, wherein the first light is not emitted to the second position and the second light is not emitted to the first position; and an optical sensor, configured to sense optical data generated based on at least one of the first light source and the second light source; wherein a detecting region of the optical sensor comprises an upper half region and a lower half region, wherein a size of the upper half region is adjustable.