Vehicle Alert Apparatus Using Driver Deceleration Learning
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Solution Overview
Problem
Conventional alert apparatuses for vehicles fail to issue alerts at appropriate timings due to inappropriate measurement of time length for retreading/switching pedals and deceleration of the host vehicle, which vary depending on the driver's behavior.
Innovation Solution
The apparatus obtains operation characteristics values representing the deceleration operation characteristics of the host vehicle driver during rapid approach conditions and stores these as operation characteristics learning values. These values are then used to calculate the required inter-vehicular distance, enabling alerts to be issued at more appropriate timings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conventional apparatus measures the time length for retreading/switching pedals and deceleration during ordinary travel, then the measurement covers all driving conditions, but the measured values are not appropriate for critical situations
Solution Approach 1:
The system dynamically adjusts the measurement conditions by distinguishing between ordinary travel states and rapid approach states. It only measures and stores operation characteristics values when the rapid approach condition is satisfied, ensuring that the measured values reflect critical situation behavior rather than ordinary driving patterns.
Solution Approach 2:
The system changes the measurement parameters based on the driving state. When the rapid approach condition is met, it activates measurement of time length for retreading/switching pedals and deceleration values. Otherwise, it does not perform these measurements, thereby ensuring that only relevant critical situation data is collected.
2Loss of time
If the conventional apparatus uses measured values from ordinary travel to calculate appropriate inter-vehicular distance, then the calculation is simple, but the alert timing is not appropriate
Solution Approach 1:
The system performs preliminary measurement and storage of operation characteristics values during critical situations before alerts are needed. The controller stores these values in a storing device for later use in calculating the appropriate inter-vehicular distance, ensuring accurate alert timing without adding complexity to the real-time calculation process.
3Measurement precision
If the apparatus measures operation characteristics only during rapid approach conditions, then the measured values are appropriate for critical situations, but the measurement opportunity is limited
Solution Approach 1:
The system uses the natural occurrence of rapid approach conditions in actual driving to automatically collect measurement data. When such conditions occur naturally, the system captures and stores the operation characteristics values without requiring external intervention or artificial test scenarios, thereby maintaining measurement precision while utilizing available driving situations.
Data Source
AI summary
A driving support ECU of an alert apparatus obtains, when the ECU determines that a rapid approach condition becomes satisfied while a following preceding vehicle state in which the host vehicle is traveling so as to follow the preceding vehicle owing to a driving operation by the host vehicle driver is occurring, operation characteristics values representing characteristics of a deceleration operation performed by the host vehicle driver to decelerate the host vehicle after a time point at which the rapid approach condition becomes satisfied, and store operation characteristics learning values that vary depending on the operation characteristics values. When the ECU determines that the following preceding vehicle state has newly occurred, the ECU calculates, based on the operation characteristics learning values, a required inter-vehicular distance, and performs an alert operation when the ECU determines the inter-vehicular distance currently obtained is equal to or shorter than the required inter-vehicular distance.