Variable Time Period Walking Detection for Authentication Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing authentication systems for vehicles lack convenience in determining whether a person is walking or not, which can lead to temporary disabling of device operations and prolonged recovery times when erroneous determinations occur.
Innovation Solution
An authentication system that includes a mobile device with an acceleration sensor to output acceleration signals, a processing device to determine if the person is walking based on these signals, and a control device to control operations based on the authentication and walking determination results, with the ability to shorten the time period for determining non-walking status when acceleration change falls below a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the authentication system uses a fixed time period to determine whether a person is walking based on acceleration signals, then the system maintains simplicity in its determination logic, but the system suffers from prolonged recovery time when erroneous determinations occur
Solution Approach 1:
The patent applies dynamics by making the determination time period variable rather than fixed. The control device dynamically adjusts the time period based on the person's movement state: using a first (longer) time period when walking is determined and a second (shorter) time period when non-walking is determined. This dynamic adjustment resolves the contradiction by allowing faster recovery from erroneous walking determinations while maintaining adequate monitoring during actual walking states.
Solution Approach 2:
The patent changes the parameter of determination time period based on the detected movement state. When the acceleration sensor indicates non-walking, the system switches to a shorter second time period, enabling quicker recovery from potential errors. This parameter change strategy resolves the contradiction between maintaining simple logic and reducing recovery time by adapting the time parameter to the current state.
2Reliability
If the authentication system continuously monitors acceleration signals with a long time period, then the system reduces false positives from transient movements, but the system increases the time to recover from temporary disabling due to erroneous determinations
Solution Approach 1:
The system dynamically adjusts the monitoring time period based on the current determination result. When non-walking is determined, it switches to a shorter second time period that enables faster recovery from erroneous determinations. This dynamic approach resolves the contradiction by allowing the system to use longer monitoring periods for reliability when needed, while switching to shorter periods for faster recovery when the person is stationary.
Solution Approach 2:
The patent implements periodic determination processing with different time periods based on the current state. The control device alternates between a first time period and a second time period depending on whether walking or non-walking is determined. This periodic action with variable periods resolves the contradiction by optimizing the balance between reliability and recovery time at different operational phases.
3Loss of time
If the authentication system uses a short time period for walking determination, then the system enables quick recovery from erroneous determinations, but the system increases the likelihood of false positives from transient movements
Solution Approach 1:
The system dynamically selects the appropriate time period based on the current determination state. When non-walking is determined, it uses a short second time period for quick recovery. When walking is determined, it switches to a longer first time period to filter out transient movements and maintain reliability. This dynamic selection resolves the contradiction by applying the short time period only when appropriate for recovery, not during active walking monitoring.
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
Improves the convenience of the authentication system by quickly enabling device operations when it is determined that the person is not walking, reducing the time to recover from temporary disabling due to erroneous walking determinations.
Implementation Method 1
an acceleration sensor installed in the mobile device and configured to output an acceleration signal corresponding to acceleration applied to the mobile device
Data Source
AI summary
A mobile device is carried by a person to be authenticated. An acceleration sensor is installed in the mobile device and configured to output an acceleration signal corresponding to acceleration applied to the mobile device. A processing device is configured to execute determination processing for determining whether the person is walking based on the acceleration signal. A control device is configured to control operation of a controlled device based on a result of the determination processing and a result of processing for authenticating, by way of the mobile device, the person as a user of the controlled device. The processing device is configured to determine that the person is not walking in a case where an amount of change in the acceleration falls below a threshold before a prescribed time period elapses while the determination processing is executed.