Portable Optical Touch System Using Segmented Camera Alignment
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Solution Overview
Problem
Conventional optical touch positioning systems are cumbersome and heavy due to fixed optical sensors, making them inconvenient for movement and assembly.
Innovation Solution
A portable optical touch system comprising two camera devices with adjusting and measuring modules, allowing for flexible placement and calculation of object coordinates on a plane, utilizing rotary mechanisms and signal transmitters/receivers for precise alignment and distance measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical sensors are fixed on the panel, then the optical touch positioning system can accurately detect object coordinates, but the system becomes heavy and complicated for assembly
Solution Approach 1:
The system divides the optical sensing function into separate portable camera devices that can be independently positioned at corners, rather than integrating sensors directly into the panel structure. This segmentation allows flexible assembly and reduces overall system complexity while maintaining measurement precision through multiple distributed sensing points.
Solution Approach 2:
The camera devices serve multiple functions: they capture images for coordinate detection, provide structural support for positioning, and enable portable deployment across different surfaces. This multi-functionality reduces the need for separate specialized components, simplifying assembly while maintaining accurate coordinate measurement capabilities.
2Reliability
If optical sensors are fixed on the panel, then the optical touch positioning system can maintain stable sensing, but the system becomes heavy and inconvenient for movement
Solution Approach 1:
The sensing system is segmented into independent portable camera devices that can be separately positioned and stabilized on different surfaces. Each camera device maintains reliable sensing for its local area without requiring the entire system to be heavy and fixed, achieving sensing stability through distributed modular units rather than a single heavy integrated structure.
3Reliability
If a huge-size panel is moved with the optical touch positioning system, then the system can maintain its sensing network, but the system becomes heavy and inconvenient
Solution Approach 1:
The sensing network is segmented into independent camera devices positioned at corners rather than being integrated into a single large panel. This allows the sensing network to be maintained through distributed units that can be independently transported and deployed, significantly improving portability while preserving network integrity through coordinated operation of multiple devices.
Solution Approach 2:
The system transitions from a two-dimensional panel-based sensing network to a three-dimensional distributed camera device arrangement. This dimensional change allows the sensing network to be established in space without requiring a physical panel, enabling easy portability while maintaining network integrity through spatial coordination of multiple devices.
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 lightweight, easy-to-assemble, and portable optical touch systems that can be conveniently installed on various surfaces, providing accurate coordinate calculations for optical touch operations.
Implementation Method 1
an optical path of the position is blocked by the object, an intensity of an optical signal detected by the optical sensor is decayed
Implementation Method 2
a second measuring module connected to the second imaging module for calculating a distance between the first imaging module and the second imaging module with the first measuring module
Data Source
AI summary
A portable optical touch system is disclosed in the present invention. The portable optical touch system includes two camera devices movably connected with each other and respectively disposed on two corners of a plane. Each camera device includes an imaging module for capturing an image of an object on the screen, an adjusting module connected to the imaging module for determining whether the two imaging modules are positioned on the same plane, and a measuring module connected to the imaging module for calculating a distance between the two imaging modules. The portable optical touch system further includes a controlling unit electrically connected to the camera device for calculating a coordinates of the object on the plane by analyzing the distance between the imaging modules and the images captured by the imaging modules.