Collision Mitigation Device Actuation Logic
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Solution Overview
Problem
Existing collision mitigation systems for vehicles fail to appropriately determine whether to perform control, as they do not consider the presence of other vehicles in the own vehicle's traveling segment, leading to potential unnecessary activation in situations where collision avoidance is likely.
Innovation Solution
A collision mitigation device equipped with actuation condition setting, actuation control, traveling segment recognition, and in-segment presence recognition means, which relaxes actuation conditions when a target object is present within the own vehicle's traveling segment, allowing for more accurate determination of collision probability and earlier activation of collision mitigation measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If collision probability is determined based on overlap rate alone, then the system can be simple to operate, but the system cannot appropriately determine whether to perform control in all situations
Solution Approach 1:
The road area is segmented into multiple traveling segments, and the system determines whether a target object is present in the own vehicle's traveling segment. This segmentation allows the system to consider the spatial context of the target object, improving the reliability of control decisions while maintaining operational simplicity through clear segment-based logic.
Solution Approach 2:
The system transitions from a one-dimensional overlap rate calculation to a two-dimensional assessment by incorporating the traveling segment information. This additional dimensional context (whether the target is in the same traveling segment) enables more accurate control decisions without significantly complicating the operation.
2Productivity
If the system activates collision mitigation based on overlap rate alone, then control can be performed consistently, but unnecessary activation occurs when collision avoidance is likely
Solution Approach 1:
By dividing the road into traveling segments and checking whether the target object is within the own vehicle's segment, the system adds a contextual filter to control activation. This prevents unnecessary activation in situations where the target is in a different segment (e.g., parked vehicles on the shoulder), while maintaining consistent activation when the target is within the same segment.
Solution Approach 2:
The system applies different control activation criteria based on the local context of the target object's position. When the target is in the own vehicle's traveling segment, the system is more likely to activate control; when the target is outside the segment, the system avoids unnecessary activation. This localized decision-making improves both consistency and appropriateness.
3Measurement precision
If the system considers traveling segment presence, then the accuracy of collision probability judgment is improved, but the device complexity increases
Solution Approach 1:
The road is divided into discrete traveling segments, which simplifies the complexity assessment. Instead of continuous spatial analysis, the system uses segment-based discrete checks. This segmentation approach improves measurement precision while keeping the device complexity manageable through clear, rule-based segment comparison logic.
Solution Approach 2:
The system adds traveling segment information as an additional dimension to collision probability assessment. This dimensional enhancement improves judgment accuracy by incorporating spatial context, while the complexity increase is mitigated by using straightforward segment membership determination rather than complex continuous spatial modeling.
Data Source
AI summary
A collision mitigation device sets an actuation condition indicating a condition for actuating a collision mitigating section configured to mitigate collision damage when an own vehicle is in a collision. A target object is positioned near the own vehicle and detected. The collision mitigating section is actuated when a positional relationship between the own vehicle and the target object meets the actuation condition. The collision mitigation device recognizes an own vehicle traveling segment that indicates a traveling segment of a road on which the own vehicle is traveling, and recognizes whether or not the target object is present within the own vehicle traveling segment. The actuation condition is relaxed in such a manner that the collision mitigating section is more easily actuated when the target object is present within the own vehicle traveling segment, compared to when the target object is not present within the own vehicle traveling segment.