Vehicle Pitch Angle Detection Correction for Road Gradient Influence
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Solution Overview
Problem
Existing vehicle orientation detection systems face a decrease in detection precision due to road gradients, particularly when using sensors like vehicle height sensors, as they are influenced by the road's slope, leading to complications in configuration and accuracy.
Innovation Solution
An orientation detection device that includes a detection information obtaining unit, an orientation computation unit, a gradient information obtaining unit, and a correlation correction unit, which corrects the correlation between sensor data and pitch angle based on road gradient information, ensuring precision by adapting to the road's slope.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a sensor detecting vertical displacement is used to compute pitch angle, then the detection configuration is simplified, but the measurement precision deteriorates due to road gradient influence
Solution Approach 1:
The patent introduces road gradient information as an intermediary element that mediates between the sensor data and pitch angle computation. By obtaining road gradient information from map data and using it to correct the correlation between sensor output and pitch angle, the system compensates for the harmful effect of road gradients while maintaining the simplicity of using basic vertical displacement sensors
2Measurement precision
If road gradient information is obtained and used to correct the correlation, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The system uses existing map data that is already available in the vehicle's navigation system to obtain road gradient information. This self-service approach allows the system to compensate for road gradient effects without adding external sensors or complex hardware, as the correction data comes from the vehicle's own existing resources
Solution Approach 2:
The patent transitions from a one-dimensional sensor measurement (vertical displacement) to a two-dimensional correction approach by incorporating road gradient information from map data. This dimensional enhancement allows the system to account for road slope effects and improve pitch angle accuracy without requiring additional physical sensors
Data Source
AI summary
An orientation detection device obtains a detection information of a sensor that detects a displacement in the vertical direction occurring in the vehicle, computes a pitch angle of the vehicle on the basis of the detection information, obtains a gradient information indicating a gradient of a road on which the vehicle travels, and corrects a correlation between the detection information used in computation and the pitch angle on the basis of the gradient information.