Wearable Biosignal Detection with Dynamic Attachment Control

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Solution Overview

Problem

Wearable mobile devices that detect biosignals often cause discomfort due to excessive tightness, even when not actively detecting signals, leading to user dissatisfaction and potential health issues from prolonged constriction.

Innovation Solution

A wearable mobile device with a bracelet configuration that determines its attachment state to the user, activating sensors only when closely attached, using sensors like analog front ends and additional sensors to measure impedance and position, allowing for selective biosignal detection and providing services based on attachment status.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the wearable mobile device is closely attached to the skin to detect biological signals, then the detection accuracy is improved, but the user comfort deteriorates due to excessive tightness and constriction

Engineering Contradiction:

Improvebiological signal detection accuracyVSAvoiduser discomfort and constriction

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The wearable mobile device dynamically adjusts its attachment state between closely attached and loosely attached based on whether biological signal detection is required. The device transitions from a tightly constricting state to a relaxed state, making the constriction force dynamic rather than static, thereby resolving the contradiction between detection accuracy and user comfort.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The device periodically attaches closely to the skin only when biological signal detection is needed, and loosens when detection is not required. This periodic attachment and detachment pattern allows the device to achieve accurate measurements when necessary while minimizing user discomfort during non-detection periods.

Inventive Principle:

Principle #19Periodic action

2Reliability

If the wearable mobile device is closely attached to the skin at all times for biosignal detection, then the detection readiness is improved, but the user comfort deteriorates due to continuous constriction

Engineering Contradiction:

Improvedetection readinessVSAvoidcontinuous constriction discomfort

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The attachment state is made dynamic, switching between closely attached (for detection readiness) and loosely attached (for comfort) based on operational requirements. This eliminates the need for continuous tight attachment while maintaining detection capability when needed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The device extracts the constriction function from being continuous and makes it conditional only on detection needs. By separating the attachment function from constant wear, the device achieves detection readiness only when necessary while removing unnecessary continuous constriction that causes discomfort.

Inventive Principle:

Principle #2Taking out (Extraction)

3Object-affected harmful factors

If the wearable mobile device is loosely attached to the skin, then the user comfort is improved, but the biological signal detection accuracy deteriorates

Engineering Contradiction:

Improveuser comfortVSAvoidbiological signal detection accuracy

Core Design Contradiction:

Object-affected harmful factorsVSMeasurement precision

Solution Approach 1:

The device dynamically switches attachment states based on operational mode. During non-detection periods, the device remains loosely attached for comfort. When detection is required, it transitions to a closely attached state to ensure measurement accuracy, making the attachment level adaptive rather than fixed.

Inventive Principle:

Principle #15Dynamics

4Object-affected harmful factors

If the wearable mobile device is loosely attached to the skin, then the user comfort is improved, but the detection reliability deteriorates

Engineering Contradiction:

Improveuser comfortVSAvoiddetection readiness

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The attachment state is dynamically controlled to be loosely attached during non-detection periods (improving comfort) and closely attached during detection periods (ensuring reliability). This dynamic adjustment resolves the contradiction by making reliability conditional on active detection mode rather than constant attachment.

Inventive Principle:

Principle #15Dynamics

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 comfortable wear by detecting biosignals only when necessary, reducing user discomfort and optimizing device usage, while providing accurate biosignal-based services without unnecessary data consumption or display information.

Implementation Method 1

using sensors like analog front ends and additional sensors to measure impedance and position

Methodology Applied

Scientific EffectImpedance measurement: Electrical Impedance Tomography

Data Source

PatentEP3513713B1Wearable mobile device and method of measuring biological signal with the same

Publication Date: 2021.07.07 SAMSUNG ELECTRONICS CO LTD

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AI summary

A wearable mobile device and a method of detecting a biosignal with a wearable mobile device are provided. A method of detecting a biosignal with a wearable mobile device involves determining whether a wearable mobile device is closely attached to a user; and providing a biosignal-based service in response to the wearable mobile device being determined to be closely attached to the user.