Wearable device including structure for preventing noise caused by static electricity
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Solution Overview
Problem
Wearable devices experience noise in measurement signals due to static electricity generated by friction between clothing and the user's body, which deteriorates measurement precision and adhesion, especially during prolonged use.
Innovation Solution
A wearable device with a shielding layer having a floating potential, separate from the main body unit, to prevent external static electricity from affecting the measurement signals, combined with a flexible circuit board design and ventilation holes to manage moisture and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wearable device is attached to the user's body for prolonged periods to ensure accurate diagnosis, then measurement reliability is improved, but static electricity generated by friction between clothes and the device or user's body creates noise that deteriorates measurement precision
Solution Approach 1:
A shielding layer is introduced as an intermediary component between the electrode and the external environment. This shielding layer acts as a mediator that blocks static electricity from reaching the electrode, thereby preventing noise generation while allowing the device to remain in contact with the user's body for prolonged periods. The shielding layer is electrically connected to the electrode but isolated from external static electricity sources.
Solution Approach 2:
The patent converts the harmful effect of static electricity into a beneficial shielding effect. By creating a controlled electrical connection between the shielding layer and the electrode, the system uses the conductive properties of the shielding layer to redirect and dissipate static electricity charges before they can interfere with the measurement signal, effectively turning a harmful factor into a protective mechanism.
2Object-affected harmful factors
If the shielding layer is electrically connected to the main body unit, then noise protection is improved, but device complexity increases due to additional electrical connections and grounding requirements
Solution Approach 1:
The shielding layer is merged with the electrode structure, forming an integrated component where the shielding layer and electrode share a common electrical connection point. This merging eliminates the need for separate grounding circuits and reduces the number of electrical connections required, thereby simplifying the overall device architecture while maintaining effective noise protection.
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
Enhances adhesion to the skin and reduces noise interference, ensuring accurate and continuous biosignal measurement over extended periods.
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
Data Source
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 pad 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.