In-Vehicle Left-Behind Object Detection With Dynamic Ride Thresholds
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Solution Overview
Problem
Existing in-vehicle monitoring systems often notify occupants of a notification object left behind in a vehicle unnecessarily, causing annoyance and stress when the object temporarily rides alone due to inadequate condition settings.
Innovation Solution
An in-vehicle monitoring device that determines whether a notification object is left behind using sensors and processing circuitry, adjusting notification criteria based on whether the ride is a first ride, with relaxed conditions for unavoidable temporary rides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If notification is performed when a notification object is detected in a vehicle after a predetermined time has elapsed, then safety is improved by detecting left-behind objects, but annoyance and stress increase when the object temporarily rides alone unavoidably
Solution Approach 1:
The notification condition is made dynamic by adjusting the time threshold based on whether the vehicle is in a first ride state. When the vehicle is in a first ride state (no occupants initially, then notification object enters alone), a longer time threshold is applied. When occupants are present initially, a shorter time threshold is used. This dynamic adjustment allows the system to distinguish between temporary alone-riding cases and actual abandonment cases, reducing false notifications while maintaining safety detection.
Solution Approach 2:
The system changes the time parameter for notification based on the ride state. Specifically, when the vehicle is in a first ride state, the notification time threshold is extended beyond the predetermined time, while in other states the original predetermined time threshold is used. This parameter change enables the system to accommodate unavoidable temporary alone-riding scenarios without compromising the detection of genuine left-behind situations.
2Ease of operation
If a fixed time threshold is used for notification, then the system is simple to operate, but it cannot distinguish between temporary alone-riding and actual abandonment
Solution Approach 1:
The notification threshold is transformed from a fixed value to a dynamic value that adapts based on the vehicle's ride state. The system automatically determines whether the vehicle is in a first ride state and adjusts the time threshold accordingly, eliminating the need for manual configuration while improving detection precision. This dynamic approach maintains ease of operation as the system self-adjusts without user intervention.
Solution Approach 2:
The system uses feedback from the ride state detection (whether occupants are present and whether this is a first ride) to automatically adjust the notification time threshold. This feedback mechanism enables the system to distinguish between temporary alone-riding and actual abandonment cases, improving detection precision while maintaining operational simplicity through automatic adaptation.
Data Source
AI summary
An in-vehicle monitoring device includes: an in-vehicle information acquisition unit to acquire in-vehicle information; an occupant detection unit and a notification object detection unit to detect an occupant in a vehicle and a notification object in the vehicle, respectively, using the in-vehicle information; a first ride determination unit to determine whether ride of the occupant or the notification object in the vehicle is a first ride; a left-behind determination unit to determine whether the notification object is left behind; and a notification control unit to determine that notification is necessary when a first condition is satisfied in a case where it is determined that the notification object is left behind. In a case where the ride is a first ride, the notification control unit determines necessity of notification using a second condition relaxed as compared with the first condition in a case where the ride is not a first ride.