Vehicle Door Locking Alert for Misplaced Digital Key Smartphones
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Solution Overview
Problem
Existing vehicle door locking systems fail to reliably detect the presence of information processing devices, such as smartphones with registered digital keys, leading to potential misplacement issues without alerting users.
Innovation Solution
Incorporating a confirmation section to verify the presence of the information processing device at vehicle door locking, a determination section to detect vibration or movement within a predetermined time, and an actuation section to sound an alarm if no movement is detected, using changes in radio wave intensity or user interaction with a physical key.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system relies solely on confirmation that the information processing device is inside the vehicle, then the alarm activation is simple, but false negatives occur when the device is actually left inside despite not being detected
Solution Approach 1:
The system performs preliminary detection of the information processing device before door locking, and if not detected, waits for a predetermined period to monitor for vibration or movement. This preliminary action sequence allows the system to make more reliable determination about device presence without immediate alarm activation, reducing false negatives while maintaining reasonable system complexity.
Solution Approach 2:
The system incorporates feedback mechanisms by monitoring vibration and movement signals during the predetermined waiting period after door locking. This feedback loop provides additional information about device presence, allowing the system to distinguish between devices that are truly absent versus those that were left inside but not initially detected, thereby improving detection accuracy.
2Speed
If the system actuates an alarm immediately when the device is not confirmed inside, then the response is quick, but it may cause false alarms or miss actual misplacement
Solution Approach 1:
Instead of immediate alarm activation, the system performs preliminary monitoring during a predetermined period after door locking to detect vibration or movement. This delays the alarm response slightly but significantly improves accuracy by gathering additional evidence about device presence before triggering the alarm.
Solution Approach 2:
The system cushions against potential false alarms by incorporating a predetermined waiting period and vibration/movement detection before alarm activation. This buffer period allows the system to verify device absence more reliably, preventing premature or false alarm activation while maintaining relatively quick response time.
3Reliability
If the system monitors vibration and movement for a predetermined period, then detection accuracy improves, but the time required for door locking process increases
Solution Approach 1:
The system performs the confirmation process as a preliminary action before the actual door locking sequence. By checking for device presence and monitoring vibration/movement during this preliminary phase, the system gathers necessary information without significantly extending the critical door locking time, as the monitoring occurs in parallel or before the locking mechanism activates.
Solution Approach 2:
The system uses periodic monitoring at specific intervals (immediately after door locking, then during a predetermined period) rather than continuous monitoring. This periodic approach provides sufficient detection accuracy while minimizing the time added to the door locking process, as monitoring is activated only at necessary moments rather than continuously.
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
Ensures users are alerted to the misplacement of information processing devices even if their presence cannot be confirmed, enhancing awareness and preventing accidental leaving behind.
Implementation Method 1
the determination section detects movement of the information processing device based on a change in intensity of a radio wave emitted to the vehicle from the information processing device
Data Source
AI summary
A vehicle includes a confirmation section that confirms, at a time of vehicle door locking, whether or not an information processing device configured to be used to perform the vehicle door locking, is inside the vehicle; a determination section that, in a case in which it has not been confirmed by the confirmation section that the information processing device is inside the vehicle, determines whether or not vibration or movement of the information processing device has been detected within a predetermined period of time from the door locking; and an actuation section that, in a case in which vibration or movement of the information processing device has not been detected by the determination section, actuates an alarm.