Bone Conduction Exercise Sensor for Motion Artifact Suppression

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Solution Overview

Problem

Existing exercise physiological sensing systems cause discomfort during high-intensity exercises due to the need for devices to be in close contact with the skin, leading to instability in measured physiological data.

Innovation Solution

An exercise physiological sensing system incorporating a bone conduction body with a physiological sensor, a signal-to-noise ratio analysis module, and a computation module that uses a motion artifact suppression processing method to stabilize heart rate signals by detecting signals from the temporal bone portion, reducing noise interference and improving data stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If physiological sensors are placed in close contact with the skin for high-intensity exercise monitoring, then measurement precision is improved, but user comfort deteriorates

Engineering Contradiction:

Improvephysiological data stabilityVSAvoiduser comfort

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent replaces traditional mechanical contact-based skin sensors with bone conduction technology. The bone conduction sensor detects physiological signals through bone vibration rather than requiring direct skin contact, thereby maintaining measurement precision while significantly improving user comfort during high-intensity exercise.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces bone conduction as an intermediary mechanism between the sensor and the physiological signal source. Instead of directly contacting the skin, the sensor transmits vibrations through the bone to detect heart rate and other physiological parameters, acting as a mediator that eliminates the need for uncomfortable tight contact.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If traditional skin contact sensors are used, then physiological signals can be detected, but motion artifacts increase during exercise

Engineering Contradiction:

Improvesignal detection capabilityVSAvoidmotion artifact

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent substitutes traditional mechanical skin contact sensing with bone conduction vibration sensing. By detecting physiological signals through bone vibration rather than skin contact, the system inherently filters out motion artifacts caused by skin movement and sweat, maintaining signal detection capability while reducing harmful motion interference.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent converts the rigid structure of bone, which was previously considered a limitation for flexible sensor placement, into an advantage. The immovable bone structure provides a stable platform for sensor attachment that naturally resists motion artifacts, turning the rigidity of bone into a beneficial feature for signal stability during exercise.

Inventive Principle:

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

3Reliability

If tight contact is maintained for signal stability, then measurement reliability is improved, but user comfort and awareness of surrounding sounds deteriorates

Engineering Contradiction:

Improveexercise physiological data stabilityVSAvoiddiscomfort and noise isolation

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical constraint of tight skin contact with bone conduction vibration transmission. The bone conduction sensor maintains reliable physiological data measurement through bone vibration detection without requiring tight enclosure, thereby eliminating discomfort and allowing users to remain aware of surrounding sounds during exercise.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 a stable and comfortable means to monitor exercise heart rate, enhancing data accuracy and user experience by minimizing discomfort and noise interference while allowing awareness of surrounding sounds.

Implementation Method 1

The bone conduction body has a physiological sensor. The physiological sensor detects a physiological signal from a detected area of the user.

Methodology Applied

Scientific EffectBone conduction: Conduction (electrical)

Data Source

PatentUS9999396B2Exercise physiological sensing system, motion artifact suppression processing method and device

Publication Date: 2018.06.19 IND TECH RES INST

AI summary

An exercise physiological sensing system, a motion artifact suppression processing method and a motion artifact suppression processing device for obtaining a stable exercise heart rate signal of a user during exercise are provided. The exercise physiological sensing system includes a bone conduction body, a signal-to-noise ratio analysis module, and a computation module. The bone conduction body has a physiological sensor. The physiological sensor detects a physiological signal from a detected area of the user. The signal-to-noise ratio analysis module is coupled to the physiological sensor and detects a quality stability of the physiological signal. The computation module is coupled to the signal-to-noise ratio analysis module and generates the stable exercise heart rate signal according to the physiological signal. Accordingly, the exercise physiological sensing system can effectively improve the stability of the detected physiological signal during exercise.