Accelerometer-Based Wearing State Detection for Wearable Devices

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wearable devices lack a cost-effective method to determine detachment solely based on the acceleration signal from the device, as they rely on expensive optical sensors for this purpose.

Innovation Solution

A method using a wearable device's built-in accelerometer to obtain acceleration data points, determine feature values through time intervals, and detect wearing states by analyzing these features using various mathematical transformations like FFT and entropy calculations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If optical sensors are used to determine wearable device detachment, then detection accuracy is improved, but device cost increases

Engineering Contradiction:

Improvedetection accuracyVSAvoiddevice cost

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent replaces the optical sensor-based detachment detection system with a mechanical acceleration signal-based system. The accelerometer, which is already present in the wearable device for other functions, is repurposed to detect detachment events by analyzing acceleration patterns, thereby eliminating the need for expensive optical sensors while maintaining detection capability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent enables the accelerometer to serve dual functions: its original function for motion tracking and a new function for detachment detection. By processing the acceleration signals that the accelerometer already captures for other purposes, the system achieves detachment detection without requiring additional dedicated sensors, thus reducing overall device cost

Inventive Principle:

Principle #25Self-service

2Reliability

If additional optical sensors are added to detect wearing state, then detection reliability is improved, but device complexity increases

Engineering Contradiction:

Improvedetection reliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent makes the accelerometer a multi-functional component by using it for both its original motion-related functions and for detachment detection. The same hardware resource (accelerometer) performs multiple tasks, eliminating the need for additional dedicated detachment detection sensors and thereby reducing device complexity

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the detachment detection function with the existing acceleration sensing capability. Instead of adding a separate optical sensor system for detachment detection, the solution combines this new function with the already-present accelerometer, integrating multiple functions into a single sensor system

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250322741A1Wearing state detection method, electronic device, and computer-readable storage medium

Publication Date: 2025.10.16 GOMORE INC

AI summary

An embodiment of the present invention provides a method for detecting a wearing state, an electronic device, and a computer-readable storage medium. The method comprises: obtaining M acceleration data points from a wearable device, wherein M is a positive integer; determining multiple feature values corresponding to multiple time intervals based on the M acceleration data points; and determining a wearing state of the wearable device in the corresponding multiple time intervals based on the multiple feature values.