Drop-Off Assist Alarm Suppression for Passing-Path False Alerts
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Solution Overview
Problem
Existing drop-off assist devices issue unnecessary alarms when an approaching object is stopped before a stationary object, as the alarm is triggered based on predicted movement paths without considering the proximity between the stationary and approaching objects, leading to false alerts.
Innovation Solution
A drop-off assist device with a processor that issues an alarm only when the movement path condition is met and the prohibition condition is not met, where the prohibition condition is defined by a specific proximity criterion between the stationary and approaching objects, preventing unnecessary alarms by determining if the approaching object can pass between them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an alarm is issued when an approaching object is detected based on predicted movement path, then safety of occupants is improved, but unnecessary alarms occur when the approaching object is stopped before a stationary object
Solution Approach 1:
The system applies different alarm issuance rules based on the local spatial relationship between objects. When a stationary object is present within a predetermined distance of the approaching object's predicted path, the alarm issuance is suppressed. This localized spatial condition creates a quality difference in alarm behavior without affecting overall system safety.
Solution Approach 2:
The alarm system dynamically adjusts its behavior based on real-time detection of stationary objects in the vicinity. The prohibition condition is activated or deactivated depending on the presence and position of stationary objects, making the alarm issuance dynamic rather than static based solely on approaching object detection.
2Difficulty of detecting and measuring
If the alarm issuance is based only on predicted movement path of approaching object, then detection simplicity is maintained, but false alerts occur due to proximity between stationary and approaching objects
Solution Approach 1:
The system performs preliminary detection of stationary objects before finalizing the alarm decision. By detecting stationary objects in advance and establishing their positions relative to predicted approaching object paths, the system prepares prohibition conditions that prevent false alarms without complicating the core detection mechanism.
Solution Approach 2:
The stationary object detection acts as an intermediary condition between approaching object detection and alarm issuance. This intermediate check determines whether the proximity relationship warrants suppression of the alarm, adding precision without directly complicating the primary motion detection.
Data Source
AI summary
A device includes a processor configured to: issue an alarm when a movement path condition is met and a prohibition condition is not met, the movement path condition being met when an approaching object of which a predicted movement path is a path along which the object passes by a door of the host vehicle is present; and not issue the alarm when the prohibition condition is met, even when the movement path condition is met, wherein the prohibition condition includes a condition to be met when a difference between a distance in a transverse direction from the host vehicle to a stationary object and a distance in the transverse direction from the host vehicle to the approaching object is equal to or less than a predetermined value in a case where the stationary object is present, the stationary object being stationary at a side of the host vehicle.