Wearable Accelerometer Vital Sign Monitoring

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Solution Overview

Problem

Current vital sign monitoring technologies are invasive and prone to disruptions, especially in situations where subjects are infants, young children, or elders, leading to unreliable data and potential harm.

Innovation Solution

A contactless monitoring system using an accelerometer device coupled with a computing device to continuously monitor vital signs without tethering, by detecting movement through a solid medium like a bed, and processing acceleration signals to estimate heart rate and respiration rate in real-time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If tethering monitoring equipment to a subject is used, then monitoring reliability is improved, but subject comfort and ease of operation deteriorate

Engineering Contradiction:

Improvemonitoring reliabilityVSAvoidsubject comfort

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent replaces the mechanical tethering system with a wireless monitoring system. The wearable device communicates with monitoring equipment via wireless communication protocols, eliminating physical cables and constraints while maintaining continuous monitoring capability. This substitution resolves the contradiction by removing the mechanical constraint that caused discomfort while preserving monitoring reliability through wireless data transmission.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a wireless communication intermediary between the wearable sensor and monitoring equipment. This intermediary enables data transmission without direct physical connection, allowing the subject to move freely while maintaining reliable monitoring. The wireless intermediary resolves the contradiction by decoupling the monitoring function from the mechanical tethering that caused discomfort.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Stability of the object's composition

If tethering monitoring equipment to a subject is used, then monitoring stability is improved, but disruption risk worsens

Engineering Contradiction:

Improvemonitoring stabilityVSAvoidmonitoring continuity

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent makes the monitoring system dynamic and adaptable by using wireless communication and mobile wearable devices. The system can maintain stable monitoring while accommodating subject movement and changing positions, unlike fixed tethering systems. This dynamic approach resolves the contradiction by allowing monitoring stability without the rigidity of physical constraints that led to disruptions.

Inventive Principle:

Principle #15Dynamics

3Ease of operation

If contactless monitoring through solid medium is used, then subject comfort is improved, but measurement precision deteriorates

Engineering Contradiction:

Improvesubject comfortVSAvoidvital sign accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The patent employs wearable devices with multiple sensors that can detect various vital signs through different physiological signals. The device processes multiple data streams (accelerometry, heart rate, respiration) to compensate for the indirect measurement approach. This multi-functionality resolves the contradiction by maintaining measurement precision across multiple parameters while preserving subject comfort through contactless monitoring.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent implements feedback mechanisms where the wearable device continuously monitors vital signs and provides real-time data to the monitoring system. The system uses feedback algorithms to filter noise and enhance signal quality from the contactless measurements. This feedback approach resolves the contradiction by maintaining measurement precision through active signal processing while preserving subject comfort through the non-invasive monitoring method.

Inventive Principle:

Principle #23Feedback

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 system provides continuous, reliable, and non-invasive monitoring of vital signs, reducing the risk of disruptions and improving patient safety, especially in extended care situations.

Implementation Method 1

an accelerometer device coupled with a computing device to continuously monitor vital signs without tethering, by detecting movement through a solid medium like a bed

Methodology Applied

Scientific EffectAccelerometer: Accelerometer

Data Source

PatentUS20250194958A1Wearable devices and systems to monitor vital signs using accelerometer signals

Publication Date: 2025.06.19 ANALOG DEVICES INT UNLTD CO

AI summary

Technologies are provided for vital sign monitoring using accelerometer signals. The accelerometer signals may be obtained from a wearable device in contact with a subject being monitored. In some aspects, magnitude of the acceleration signals permits obtaining robust determination of a vital sign, such as heart rate or respiration rate, of the subject.