Wearable Airbag Activity State Detection
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Solution Overview
Problem
Existing wearable airbags for cyclists fail to efficiently manage energy consumption and prevent unintended inflation during activities other than cycling, leading to potential energy loss and risk of incorrect activation.
Innovation Solution
An airbag system with sensors and a control unit that determines the user's activity state, automatically switching to an idle state when not cycling to conserve energy and prevent unnecessary activation, featuring a user interface for alerts and a collapsible design for easy carrying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wearable airbag is constantly activated to monitor movements during cycling, then the protection reliability is improved, but the energy consumption increases
Solution Approach 1:
The airbag system dynamically adjusts its operational state based on detected activity. The control unit transitions the airbag between active monitoring state and idle state according to whether cycling activity is detected, optimizing the balance between protection reliability and energy consumption.
Solution Approach 2:
The system changes operational parameters (monitoring state) based on detected conditions. When cycling activity is detected, the system enters active monitoring mode with full sensor operation. When other activities are detected, it transitions to idle mode with reduced energy consumption, while maintaining the capability to provide protection when needed.
2Reliability
If the airbag remains in active state during all activities, then the response time to accidents is improved, but the risk of unintended inflation increases
Solution Approach 1:
The system dynamically adjusts its activation threshold and monitoring sensitivity based on the detected activity type. During cycling, the system is highly sensitive to abnormal movements. During other activities like walking or running, the system adjusts its parameters to distinguish normal activity movements from accident movements, preventing false activation while maintaining rapid response capability for actual accidents.
Solution Approach 2:
The control unit continuously receives feedback from sensors about user movements and compares them against activity-specific reference patterns. This feedback mechanism allows the system to distinguish between normal movements during various activities and abnormal movements indicating accidents, enabling appropriate response while preventing unintended inflation.
3Use of energy by moving object
If the airbag system automatically switches to idle state during non-cycling activities, then the energy consumption is reduced, but the device complexity increases
Solution Approach 1:
The airbag system performs self-monitoring and automatically determines the user's activity state using onboard sensors and control logic. The system autonomously transitions between active and idle states without requiring manual user input, reducing the need for complex external controls while optimizing energy consumption based on detected activity.
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
Reduces energy consumption and minimizes the risk of unintended inflation by accurately determining the user's activity state and adjusting the airbag's mode accordingly, ensuring it is only active during intended use.
Implementation Method 1
at least one sensor configured to measure movements of the airbag system and thus indirect the movements of the user
Data Source
AI summary
An airbag system for protecting a body part of a user in case of an accident is provided. The system including an airbag adapted for inflation upon an accident occurring during an intended activity, at least one sensor configured to measure movements of the airbag system, and thus indirect the movements of the user and a control unit configured to determine if the user is in a first activity state not corresponding to the intended activity by processing the output from the at least one sensor.