Trailer Dimension Estimation via Radar-Camera Fusion
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Solution Overview
Problem
Accurately determining trailer dimensions is challenging for automated driving systems due to obstructed driver sightlines and varying trailer dimensions, which complicates operations like reversing and autonomous vehicle functions.
Innovation Solution
A system combining vehicular radar and camera fusion to estimate trailer dimensions, using radar for depth mapping and camera images to determine horizontal dimensions and height, enabling accurate measurement and control during trailering operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar is used for depth mapping to determine trailer dimensions, then measurement capability is improved, but field of view is limited
Solution Approach 1:
The patent combines radar and camera systems into a fused sensing system. Radar provides accurate depth mapping for longitudinal dimensions while cameras capture visual information for lateral dimensions and height, merging the strengths of both sensors to overcome individual limitations.
Solution Approach 2:
The system transitions from relying solely on radar's depth dimension to incorporating camera visual dimensions. By fusing radar depth data with camera image data, the system achieves three-dimensional trailer dimension estimation (length, width, height) that compensates for radar's limited field of view.
2Ease of operation
If driver sightlines are obstructed by trailer, then visual confirmation is lost, but second person assistance is required
Solution Approach 1:
The system enables the vehicle to perform self-observation and self-measurement of the trailer. Sensors mounted on the vehicle automatically detect and map trailer dimensions without requiring external observers, allowing the vehicle to serve its own measurement needs.
Solution Approach 2:
The patent replaces the mechanical/visual system of human sightlines and manual observation with an automated sensor-based detection system. Radar and camera sensors automatically capture trailer dimensions and provide data to the control system, eliminating the need for human visual confirmation.
3Adaptability or versatility
If different trailer dimensions are accommodated, then adaptability is improved, but measurement accuracy becomes challenging
Solution Approach 1:
The system dynamically adapts its measurement approach based on detected trailer characteristics. The fused sensor system adjusts its processing algorithms to accommodate different trailer types and dimensions, maintaining accuracy across varied configurations through real-time data fusion and adaptive estimation.
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
This approach allows for reliable and accurate estimation of trailer dimensions, enhancing safety and automation in trailering operations by overcoming the limitations of radar's limited field of view and driver obstructions, enabling precise control and navigation.
Implementation Method 1
a radar for generating a depth map wherein the depth map includes a detection of a first trailer surface
Implementation Method 2
a camera for generating an image of the first trailer surface
Data Source
AI summary
Methods and apparatus are provided for determining a trailer dimension including a radar for generating a depth map wherein the depth map includes a detection of a first trailer surface, a camera for generating an image of the first trailer surface, a processor operative to determine a first dimension of the first trailer surface in response to the depth map and a second dimension of the first trailer surface in response to the first dimension and the image, and a vehicle controller controlling a vehicle in response to the first dimension and the second dimension.