Position Detection Device Using Capacitive Gap Sensing
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Solution Overview
Problem
Traditional position detection devices cannot detect conductive objects moving inside the device, only allowing them to move on the surface, lacking the capability to track internal movement.
Innovation Solution
A position detection device with a first and second electrode layer forming a gap, where a processor detects capacitive values between the electrodes to measure the movement track of conductive objects passing through, potentially incorporating blocking elements and holes to alter the movement path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional position detection device with single surface sensing is used, then device structure is simple, but it cannot detect conductive objects moving inside the device
Solution Approach 1:
The sensing system is segmented into multiple electrode layers (first electrode layer with first electrodes, second electrode layer with second electrodes, and third electrode layer with third electrodes) positioned at different depths. Each layer independently detects capacitive changes, enabling three-dimensional detection of conductive objects throughout the device volume rather than仅限于 surface detection.
Solution Approach 2:
The detection capability is extended from two-dimensional surface detection to three-dimensional volumetric detection by adding electrode layers in the vertical dimension. The gap between electrode layers creates a detectable space where conductive objects can move internally, allowing the system to track objects in three-dimensional space rather than only on the surface plane.
2Adaptability or versatility
If multiple electrode layers with gap are added to detect internal movement, then detection capability is improved, but device complexity increases
Solution Approach 1:
The multiple electrode layers serve multiple functions: they detect conductive objects in three-dimensional space, determine movement tracks through capacitive coupling analysis, and can identify objects at different depths. The same basic electrode structure is replicated across layers, providing a universal detection mechanism that handles various detection scenarios without requiring fundamentally different components.
Solution Approach 2:
The electrode layers are nested within the device structure with the first electrode layer, second electrode layer, and third electrode layer positioned at different vertical levels. The gap between layers creates a nested detection volume where conductive objects can be tracked as they move through the internal space, with each layer contributing to the overall three-dimensional detection capability.
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 the detection and tracking of conductive objects moving through the gap between the electrode layers, enhancing the capability to monitor internal movement and providing a more complex interaction in applications like arcade games.
Implementation Method 1
a processor configured to detect multiple capacitive values between the multiple first electrodes and the multiple second electrodes so as to measure the movement track of at least one conductive object passing through the gap
Data Source
AI summary
The present invention discloses a position detection device including a first electrode layer, a second electrode layer, and a processor. The first electrode layer includes a plurality of first electrodes, and the second electrode layer includes a plurality of second electrodes. A gap is formed between the first electrode layer and the second electrode layer. The processor detects a plurality of capacitive values between the plurality of first electrodes and the plurality of second electrodes so as to measure the movement track of a conductive object passing through the gap.