Floating Potential Shielding Layer for Wearable Static Noise

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Solution Overview

Problem

Wearable devices attached to the user's body experience noise in measurement signals due to static electricity, which deteriorates measurement precision, especially on dry days when static electricity is easily generated.

Innovation Solution

A wearable device is designed with a shielding layer that is conductive but has a floating potential, preventing external static electricity from affecting the main body unit. The shielding layer is arranged on the electrode unit and includes a first and second shielding region, with the second region having a mesh structure to enhance moisture permeability and static electricity discharge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of moving object

If the wearable device operates while attached to the user's body for long periods, then measurement capability is maintained, but static electricity is generated due to friction which causes noise and deteriorates measurement precision

Engineering Contradiction:

Improveduration of attachmentVSAvoidmeasurement precision

Core Design Contradiction:

Duration of action of moving objectVSMeasurement precision

Solution Approach 1:

A shielding layer is introduced as an intermediary component between the electrode unit and the external environment. This shielding layer has a floating potential that does not interfere with the measurement signal while effectively blocking static electricity from reaching the electrode, thus maintaining measurement precision during prolonged attachment.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The shielding layer is designed to be conductive with a floating potential, which allows it to interact with static electricity in a beneficial way. Instead of completely isolating the electrode (which would require complex grounding), the floating potential shielding layer passively redirects static electricity away from the measurement area, converting the harmful static electricity into a manageable electrical phenomenon.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Measurement precision

If a shielding layer is added to block static electricity, then measurement precision is improved, but device complexity increases

Engineering Contradiction:

Improvemeasurement precisionVSAvoidstructure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The shielding layer is implemented as a thin film or flexible conductive layer that can be integrated into the existing electrode unit structure. This approach adds minimal structural complexity while providing effective shielding, as the thin film can be deposited or applied during the manufacturing process without requiring additional assembly steps.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The shielding layer's key parameter is its electrical potential (floating potential), which is carefully controlled to be electrically isolated from both the electrode and the environment. By changing the electrical parameter (potential) rather than adding complex mechanical structures, the solution achieves shielding with minimal increase in device complexity.

Inventive Principle:

Principle #35Parameter changes

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 shielding layer effectively prevents external static electricity from interfering with the measurement signals, thereby maintaining the precision of the wearable device's measurements even in environments prone to static electricity.

Implementation Method 1

the electrode unit includes a shielding layer not to be electrically connected to the main body unit, the shielding layer being conductive with a floating potential

Methodology Applied

Scientific EffectElectrostatic shielding: Faraday Cage

Implementation Method 2

a patch unit including one or more conductive members, the one or more conductive members being configured to electrically connect the electrode unit to the user's skin

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS12303276B2Wearable device including structure for preventing noise caused by static electricity

Publication Date: 2025.05.20 ATSENS CO LTD

AI summary

A wearable device is provided. The wearable device is used by being attached to a user's skin. The wearable device includes a main body unit having a housing and a substrate, the substrate being arranged inside the housing, an electrode unit including a sensing electrode connected to the main body unit, and a patch unit including one or more conductive members, the one or more conductive members being configured to electrically connect the electrode unit to the user's skin. The electrode unit includes a shielding layer that is not electrically connected to the main body unit. The shielding layer is conductive with a floating potential.