Battery Swap Visual Positioning With Dual Focal-Length Imaging
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Solution Overview
Problem
The existing battery replacement systems for electric vehicles face inefficiencies in positioning, locking, and unlocking, leading to time-consuming and potentially incorrect battery mounting processes.
Innovation Solution
A visual positioning method and system that utilizes a photographing apparatus to capture images at different focal lengths for accurate positioning and locking determination, allowing for automatic adjustment and reducing the need for manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment is used for positioning the battery replacement device, then positioning accuracy can be achieved, but the process becomes time-consuming and reduces efficiency
Solution Approach 1:
The patent replaces the manual mechanical positioning system with an automated visual positioning system using cameras and image processing algorithms. The system captures images of positioning marks, automatically calculates the battery pack position and attitude through coordinate transformation, and controls the robotic arm to adjust to the correct position, eliminating time-consuming manual adjustment while maintaining high positioning accuracy.
2Measurement precision
If a single focal length is used for photographing, then the device structure remains simple, but the positioning determination accuracy is insufficient
Solution Approach 1:
The patent employs a zoom lens that can dynamically adjust its focal length based on the specific measurement task. The system uses a first focal length for capturing positioning mark images and a second focal length for capturing battery pack state images. This dynamic focal length adjustment enables the system to achieve high measurement precision for different objects without requiring multiple fixed cameras, thus balancing accuracy requirements with device simplicity.
Data Source
AI summary
A visual positioning method and system for a battery replacement device. The method comprises: controlling a battery replacement device to move below a battery accommodating portion at the bottom of an electric vehicle; photographing, by means of a photographing apparatus, a first target photographing region at a first focal length so as to obtain a positioning determination photograph; controlling the photographing apparatus to adjust the first focal length to a second focal length; and photographing, by means of the photographing apparatus, a second target photographing region at the second focal length so as to obtain a lock-state determination photograph. By means of the photographed photographs at different focal lengths, automatic adjustment of positioning, locking and unlocking is realized, not only achieving efficient and accurate determination of positioning, locking and unlocking of the battery replacement device, but also enabling the battery replacement device to achieve integral and efficient adjustment.