Steering Angular Speed Analysis for Careless Driving Detection
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Solution Overview
Problem
Conventional driver attention warning (DAW) technologies have low reliability in determining driver carelessness, as they analyze simple driving states without considering nuanced changes in steering angular speed, leading to inaccurate assessments.
Innovation Solution
A vehicle system equipped with a steering angle sensor and a controller that identifies driver carelessness by analyzing the first and second maximum changes in steering angular speed, determining if these exceed threshold values based on current vehicle speed, and confirming carelessness through multiple threshold exceedances, thereby enhancing the reliability of careless driving detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional DAW technology analyzes simple driving state, then the system complexity is low, but the reliability of driver careless determination is not high
Solution Approach 1:
The patent changes the parameter of steering angular speed analysis by calculating maximum change amounts in both positive and negative directions, and comparing them against speed-dependent threshold values. This transforms the simple driving state analysis into a multi-parameter evaluation system that reliably detects careless driving without requiring additional sensors or complex hardware.
2Measurement precision
If the system uses speed-dependent threshold values, then the measurement precision of careless driving detection is improved, but the computational complexity increases
Solution Approach 1:
The patent implements dynamic threshold values that adapt to the current vehicle speed. The threshold for determining careless driving changes based on whether the vehicle is moving at a low or high speed, allowing the system to maintain high measurement precision across different operating conditions. This dynamic adjustment is achieved through straightforward conditional logic rather than complex algorithms.
3Reliability
If the system requires multiple threshold exceedances, then the reliability of detection is improved, but the response time may be delayed
Solution Approach 1:
The patent performs preliminary calculations of the maximum steering angular speed changes in both directions and stores them for comparison. By preparing these values in advance and using efficient threshold comparison logic, the system can quickly determine whether careless driving has occurred without requiring time-consuming sequential analysis, thus maintaining fast response time while ensuring reliable detection through multiple criterion evaluation.
Data Source
AI summary
A vehicle may include a steering angle sensor; and a controller configured to be electrically connected to the steering angle sensor. The controller may be configured to identify a change amount in a steering angular speed of the vehicle according to an output of the steering angle sensor, and to identify careless driving of a driver of the vehicle according to a first maximum change amount in which the steering angular speed changes in a first direction and a second maximum change amount in which the steering angular speed changes in a second direction.