Vehicle Exit Alarm Control for Multiple Occupants and Obstructions
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Solution Overview
Problem
Existing getting-off support devices do not effectively issue alarms when multiple occupants attempt to exit a vehicle from different doors, leading to inadequate attention calling in situations where physical bodies obstruct the exit.
Innovation Solution
A getting-off support device equipped with an alarm issuing unit and control unit that determines the physical body and getting-off conditions, issuing alarms for a predetermined time or number of times, and varying the alarm manner based on repeated conditions, ensuring appropriate attention is called for each occupant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the alarm is issued for a fixed predetermined time when an occupant attempts to get off the vehicle, then the alarm duration is consistent and simple to control, but the alarm cannot be prolonged when multiple occupants attempt to exit from different doors
Solution Approach 1:
The alarm duration is made dynamic rather than fixed. The control unit adjusts the alarm duration based on the number of occupants attempting to exit. When multiple occupants are detected, the alarm duration is automatically prolonged, transforming the static alarm system into a dynamic one that adapts to different operational conditions.
Solution Approach 2:
The system uses feedback from door sensors to detect when occupants attempt to exit. The control unit receives information about door opening events and uses this feedback to determine whether to issue an alarm and how long to sustain it. This feedback mechanism enables the system to respond appropriately to multiple exit attempts.
2Reliability
If the alarm is issued repeatedly for each door opening event, then each occupant receives attention, but the alarm frequency becomes excessive and may cause distraction
Solution Approach 1:
Multiple alarm events are merged into a single continuous alarm. When the first occupant triggers an alarm and a second occupant subsequently attempts to exit, instead of issuing separate alarm pulses, the system merges these events and sustains a single prolonged alarm, ensuring reliable attention calling while avoiding excessive repetition.
Solution Approach 2:
The system issues a preliminary alarm when the first occupant attempts to exit, and then extends this alarm when additional occupants are detected. This preliminary action ensures that the alarm is already active and attention is being called before additional exit events occur, preventing the need for repeated alarm initiation.
3Device complexity
If the alarm is issued only once regardless of multiple door openings, then the system remains simple, but subsequent occupants do not receive adequate attention
Solution Approach 1:
The alarm duration dynamically extends based on the number of door opening events. The control unit monitors subsequent door openings and automatically prolongs the alarm duration accordingly, maintaining system simplicity while ensuring complete attention calling for all occupants attempting to exit.
Data Source
AI summary
A getting-off support device of a vehicle continues to issue an alarm for a predetermined time when a physical body condition indicating that a physical body that obstructs getting-off of an occupant in the vehicle exists around the vehicle and a getting-off condition indicating that the occupant in the vehicle intends to get off the vehicle are satisfied, and prolongs the time of issuing the alarm when both of the physical body condition and the getting-off condition are further satisfied while the issuing of the alarm is continued.