Calibration Device Positioning Verification for ADAS Sensors
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Solution Overview
Problem
Existing methods for calibrating advanced driver assistance system (ADAS) sensors in vehicles require complex on-board detection systems and multiple sensors, leading to increased encumbrance and complexity in positioning procedures.
Innovation Solution
A method and apparatus using a computerized system with an electronic processor to verify the positioning of a calibration device relative to a vehicle by detecting location targets, determining the position and orientation of the vehicle and calibration device in a common reference system, and comparing these to reference values to ensure correct alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex on-board detection systems with multiple sensors are used to detect the positioning and orientation of the calibration device, then the measurement precision and reliability are improved, but the device complexity and encumbrance increase
Solution Approach 1:
The patent extracts the detection function from the calibration device itself and relocates it to the vehicle's existing on-board sensors. The calibration device is simplified to only carry location targets, while the vehicle's cameras and other sensors perform the detection and positioning verification, thereby reducing calibration device complexity while maintaining measurement precision.
Solution Approach 2:
The vehicle's own on-board detection systems serve the dual purpose of both normal vehicle operation and calibration device positioning verification. The existing sensors detect and verify the calibration device position without requiring additional dedicated sensors, making the system self-sufficient and reducing overall complexity.
2Measurement precision
If multiple sensors are placed on the calibration device at positions apart from each other, then the measurement capabilities are improved, but the transversal encumbrance of the calibration device increases
Solution Approach 1:
The detection sensors are extracted from the calibration device and relocated to the vehicle. Only lightweight location targets remain on the calibration device, dramatically reducing its encumbrance while the vehicle's sensors provide the necessary measurement capabilities.
Solution Approach 2:
The vehicle's on-board sensors serve multiple functions: normal vehicle operation and calibration device positioning detection. This multi-functionality eliminates the need for dedicated sensors on the calibration device, reducing its size and encumbrance.
3Measurement precision
If various sensors such as cameras, distance meters, and inclinometers are installed on the calibration device, then the positioning detection accuracy is improved, but the complexity of the positioning procedure and device structure increases
Solution Approach 1:
All detection sensors are extracted from the calibration device and relocated to the vehicle. The calibration device is simplified to only carry location targets, while the vehicle's existing sensor suite performs all detection functions, reducing both device and procedure complexity.
Solution Approach 2:
Location targets serve as intermediaries between the calibration device and the vehicle's sensors. These simple targets enable the vehicle's sensors to detect and verify the calibration device position without requiring complex sensors or procedures on the calibration device itself.
Data Source
AI summary
Method and apparatus of positioning of a calibration device for one or more sensors of a vehicle wherein a computerized system determines or knows data representative of the position and orientation of the vehicle with respect to a common reference system, and data representative of the position and orientation, with respect to the common reference system, of at least one location target directly or indirectly fixed to a base surface in front of or behind the vehicle. The computerized system is configured for: obtaining one or more detections of the location target using a sensor fixed to the calibration device; obtaining data representative of the current position and orientation of the calibration device with respect to the common reference system based on determining said data representative of the position and orientation, in the common reference system, of the location target, and said one or more detections of the location target itself obtained from the sensor fixed to said calibration device; verifying whether the current position and orientation of the calibration device are correct or not and eventually perform a step of correction of position and orientation.