Vehicle Sensor Alignment During Straight-Line Driving Detection

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Solution Overview

Problem

Existing vehicle sensor calibration methods struggle to accurately align sensors while the vehicle is in motion, particularly when not driving in a straight line, leading to potential inaccuracies in environmental detection.

Innovation Solution

A method and system for determining a straight-line driving condition using multiple variables, including bank angle, torque, and GPS data to calibrate sensors when the vehicle is moving in a straight line, utilizing a processor to analyze data from various sources to ensure accurate alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If sensor calibration is performed while the vehicle is in motion, then calibration can be done without stopping the vehicle, but accuracy deteriorates when the vehicle is not moving in a straight line

Engineering Contradiction:

Improvecalibration availabilityVSAvoidsensor alignment accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The system dynamically evaluates multiple condition variables (bank angle, torque, GPS heading, wheel velocity, road curvature) to determine the optimal calibration时机, adapting to changing vehicle motion states rather than using a fixed calibration protocol

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes multiple parameters simultaneously (vehicle trajectory, road bank angle, steering torque, wheel velocities) and monitors their combined effect to identify suitable calibration conditions, using a composite assessment rather than relying on a single parameter

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If multiple condition variables are used to determine straight-line driving, then calibration accuracy is improved, but system complexity increases

Engineering Contradiction:

Improvestraight-line detection accuracyVSAvoidcalibration system complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The system segments the calibration determination into five distinct condition variables (bank angle, torque, GPS heading, wheel velocity, road curvature), each evaluated independently and then combined to make the final calibration decision

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system uses a multi-functional approach where GPS data serves multiple purposes (heading, position, trajectory), and the same sensor suite is used for both normal operation and calibration assessment, avoiding dedicated hardware

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250314505A1Detection of straight driving for motion estimation and sensing alignment

Publication Date: 2025.10.09 GM GLOBAL TECHNOLOGY OPERATIONS LLC

AI summary

A vehicle includes a system for calibrating a sensor of the vehicle moving on a road section. The processor determines a control condition variable indicative of a trajectory of the vehicle with respect to a straight line, determines a bank angle condition variable indicative of a motion of the vehicle with respect to the straight line based on a bank angle of the road section, determines a torque condition variable indicative of the motion of the vehicle with respect to the straight line based on a torque applied to a steering wheel of the vehicle, determines a straight-line condition for the vehicle when at least one of the control condition variable, the bank angle condition variable and the torque condition variable indicates that the vehicle is moving in the straight line, and calibrates the sensor when the vehicle is in the straight-line condition.