Seam-Integrated Capacitive Garment Sensors for Reliable Gesture Input
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Solution Overview
Problem
Existing wearable touch-sensitive garments face challenges in producing and integrating fabric-based sensing electrodes, which are cumbersome, prone to failures, and difficult to mass-produce, due to the need for specialized materials and complex connections.
Innovation Solution
A wearable touch-sensitive garment with an array of electronic capacitive sensors integrated along a seam, using a flexible bus for power and data, and an ECU for evaluating parasitic capacitive coupling, providing tactile feedback and wireless connectivity via Bluetooth or BLE, eliminating the need for fabric-based sensing electrodes and simplifying production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fabric-based sensing electrodes are used in wearable garments, then the garment can be produced using textile materials, but the production process becomes complex and prone to failures due to specialized materials and complex connections
Solution Approach 1:
The patent extracts the sensing electrode function from the fabric structure itself and places discrete electronic capacitive sensors at specific locations (seams, edges) where touch detection is needed. This eliminates the complexity of creating conductive fabric structures while maintaining the wearable garment's textile appearance and comfort.
Solution Approach 2:
Instead of making the entire fabric conductive or embedding sensors throughout the garment, the patent applies sensing functionality only at specific locations where touch input is expected (seams, edges, pockets). This localized approach reduces material complexity and simplifies production while maintaining sensing capability.
2Reliability
If fabric-based sensing electrodes are used, then the garment can be made with textile materials, but the number of failure paths increases compared to robust single piece electronics
Solution Approach 1:
The patent extracts the sensing function from complex fabric-based electrodes and implements it using discrete electronic capacitive sensors that connect to a microcontroller via simple conductive pathways. This reduces the number of potential failure points by eliminating the need for complex fabric-electronic interfaces while maintaining reliability.
Solution Approach 2:
The patent changes the sensing mechanism from fabric-based resistive or capacitive measurements to electronic capacitive sensing with defined electrical parameters. This allows for more reliable signal detection and processing while reducing sensitivity to material variations and connection issues.
3Productivity
If sensor yarns are developed and woven into fabric to create sensing electrodes, then the garment can function as a touch sensor, but the production process becomes difficult and time-consuming
Solution Approach 1:
The patent extracts the sensing electrodes from the fabric weaving process and implements them as separate electronic components positioned at garment seams and edges. This allows standard textile manufacturing processes to be used for the garment body, while sensors are added through simpler attachment methods, significantly improving production efficiency.
Solution Approach 2:
The patent segments the sensing function from the garment manufacturing process. The garment can be produced using conventional textile methods, and the electronic sensing components are integrated as separate modules, allowing parallel production and assembly, thereby increasing overall productivity.
4Adaptability or versatility
If conductive textiles are used for capacitor plates and wires, then the device can be integrated into textiles, but the device becomes bulky
Solution Approach 1:
The patent uses conventional conductive materials (metal traces, wires) only at specific locations where electrical connections are needed (seams, edges, sensor mounting points) rather than throughout the entire garment. This localized use of conductors minimizes bulk while maintaining electrical functionality and adaptability to different garment designs.
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 solution achieves high accuracy and precision in gesture detection, reduces energy consumption, and simplifies production by making the electronics invisible and easier to integrate, while avoiding the issues of fabric-based sensing electrodes.
Implementation Method 1
an array of electronic capacitive sensors (12), each capacitive sensor (E1-E5) comprising a capacitive electrode (E1-E5) arranged along a seam of the garment
Implementation Method 2
the ECU (30) is configured to evaluate parasitic capacitive coupling by detecting an increase of a capacitance value of the capacitive electrode
Data Source
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AI summary
It is disclosed a wearable touch sensitive garment (100) comprising an array (12) of electronic capacitive sensors integrated into the garment (100), the array (12) of electronic capacitive sensors comprising a plurality of electrodes (E1-E5), each electrode (E1-E5) being individually electrically connected to an Electronic Control Unit (ECU) (30), the ECU (30) being configured to evaluate a parasitic capacitive coupling between each of the electrodes (E1-E5) and a wearer's touch, the ECU (30) being provided with a readable display (35) configured to display an indication representative of a gesture performed on the array (12).