Vehicle Rollover Detection with Adaptive Sensor-Corrected Criteria
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Solution Overview
Problem
Existing rollover detection methods for vehicles, such as the one described in Japanese Laid-Open Patent Application Publication No. 2011-121529, can erroneously determine a rollover state when the vehicle is not actually rolling over due to road conditions or maneuvering, leading to inaccurate detection.
Innovation Solution
A rollover detection method that utilizes a first sensor to detect swing displacement and at least one second sensor to estimate the vehicle's state, with the processing circuitry correcting the rollover criterion based on the second sensor's detection results to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rollover detection is based solely on swing displacement from a first sensor, then the detection system is simple, but false positives occur due to road conditions or maneuvering
Solution Approach 1:
A processing circuitry acts as an intermediary between the first sensor (swing displacement detector) and the rollover determination. It receives additional estimation information from at least one second sensor and uses this intermediate data to correct the rollover criterion dynamically, thereby reducing false positives without requiring a complete redesign of the detection system.
Solution Approach 2:
The rollover criterion is not fixed but is dynamically corrected based on estimation information from second sensors. The processing circuitry adjusts the threshold or parameters for determining rollover by comparing swing displacement data with additional vehicle state estimation data, allowing the detection threshold to adapt to different driving conditions and reduce false positives.
2Measurement precision
If multiple sensors are used to improve detection accuracy, then false positives are reduced, but the device complexity increases
Solution Approach 1:
The processing circuitry serves multiple functions: it processes data from the first sensor, integrates estimation information from second sensors, corrects the rollover criterion, and makes the final determination. This multi-functional approach allows the system to achieve high measurement precision using existing vehicle sensors without adding dedicated specialized components for each function.
Solution Approach 2:
The system implements feedback by using the processing circuitry to continuously compare swing displacement data with estimation information from second sensors, then dynamically correct the rollover criterion based on this comparison. This closed-loop feedback mechanism improves measurement precision by continuously adapting the detection threshold to current vehicle conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enhances the accuracy of rollover detection by correcting the rollover criterion using additional sensors, reducing false positives and improving the reliability of rollover determination.
Implementation Method 1
a first sensor that detects an amount of swing displacement of a swing body that swings in response to a change in an attitude of a vehicle
Data Source
AI summary
A rollover detection method includes: obtaining a detection result from a first sensor that detects an amount of swing displacement of a swing body that swings in response to a change in an attitude of a vehicle; obtaining a detection result from at least one second sensor that detects estimation information for estimating a state of the vehicle independently of the first sensor; determining that the vehicle has rolled over upon determining that the amount of swing displacement of the swing body satisfies a predetermined rollover criterion based on the detection result of the first sensor; and correcting the rollover criterion based on the detection result of the second sensor.