Dynamic Brake Assist Threshold Adjustment for Collision Risk
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Solution Overview
Problem
Existing brake assist systems may fail to execute effective brake operations due to driver judgment errors, especially when the driver performs weak brake actions during low collision risk situations, leading to inadequate detection and assistance.
Innovation Solution
A brake apparatus that includes a collision risk calculation unit, detection unit, storage unit, threshold determination unit, and brake assist unit, which calculates and compares the emergency operation level with predetermined thresholds to execute appropriate brake assists based on the collision risk and driver input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detection reference for emergency brake operation is lowered to assist brake operations with shallow stepping, then brake assist can be executed in high collision risk situations, but brake assist cannot be executed when the driver performs additional brake operations with stepping speed below the lowered threshold due to judgment errors
Solution Approach 1:
The detection reference (threshold) is made dynamic by adjusting it based on collision risk levels. When collision risk is high, the threshold is lowered to detect even shallow brake operations. When collision risk is low, the threshold is raised to avoid false detection of normal brake operations. This dynamic adjustment allows the system to adapt to different driving scenarios and correctly identify emergency brake operations regardless of the driver's stepping characteristics.
Solution Approach 2:
The system changes the detection parameter (threshold value) based on the collision risk situation. By modifying the threshold parameter dynamically according to real-time collision risk assessment, the system can reliably detect emergency brake operations in various contexts - whether the driver steps shallowly due to panic or performs additional operations after an initial misjudgment.
2Ease of operation
If the detection reference is lowered to detect shallow brake operations, then brake assist can be provided for drivers with judgment errors or skill problems, but normal brake operations during low collision risk periods may be incorrectly detected as emergency operations
Solution Approach 1:
The detection threshold dynamically adapts to collision risk levels. During low collision risk periods, the threshold remains high to prevent false detection of normal brake operations. During high collision risk periods, the threshold lowers to ensure detection of genuine emergency operations. This dynamic behavior maintains both ease of detection for legitimate emergencies and precision in distinguishing them from normal operations.
Solution Approach 2:
The system adjusts the detection parameter (threshold) based on the operational context (collision risk). This parameter change ensures that the detection system maintains appropriate sensitivity - not too sensitive during normal operations, but sufficiently sensitive during emergencies - thereby achieving both ease of operation and measurement precision.
3Device complexity
If a fixed detection threshold is used for emergency brake operations, then the system structure remains simple, but the system cannot adapt to varying collision risk situations and driver behavior patterns
Solution Approach 1:
Rather than using a fixed threshold, the system employs a dynamic threshold that automatically adjusts based on real-time collision risk assessment. This dynamic approach enhances adaptability to varying situations without requiring complex manual intervention or reconfiguration, as the threshold adjustment is performed automatically by the control unit based on sensor inputs and risk algorithms.
Data Source
AI summary
A brake apparatus is configured to execute a brake assist based on a collision risk representing a risk of a vehicle including the brake apparatus to collide with an obstacle, and an emergency operation level representing an emergency level of a brake operation by a driver. The brake apparatus includes a collision risk calculation unit configured to calculate the collision risk, a detection unit configured to detect the emergency operation level, a storage unit configured to store the emergency operation level detected by the detection unit when the collision risk is within a predetermined range, a threshold determination unit configured to determine a threshold for the emergency operation level based on the collision risk, and a brake assist unit configured to execute the brake assist based on a comparison between the emergency operation level stored by the storage unit and the threshold for the emergency operation level.