Stereo Camera Segmentation for Construction Topography
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Solution Overview
Problem
Existing topography data collection in construction projects is inaccurate and inefficient, as current image pick-up systems fail to provide precise and comprehensive data of the work area, especially when the terrain varies significantly during operations.
Innovation Solution
An image pick-up apparatus for work vehicles is designed with two stereo cameras, each having multiple image pick-up portions arranged at specific intervals and angles to enhance the triangulation principle, allowing for greater accuracy in data collection by increasing the interval between image pick-up portions and aligning them to capture a wider range of the work area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple stereo cameras are attached to expand the measurement range, then the coverage area increases, but the device complexity and cost increase
Solution Approach 1:
The measurement system is segmented into two stereo cameras positioned at different locations on the work vehicle. Each stereo camera captures images of a portion of the work area, and the controller synthesizes these multiple images to create comprehensive topography data of the entire measurement range, thereby expanding coverage without requiring a single complex camera system
Solution Approach 2:
The patent transitions from a single-plane measurement approach to a multi-dimensional approach by positioning stereo cameras at different spatial locations (front and rear of the work vehicle). This spatial distribution across different dimensions enables coverage of a larger area while maintaining manageable system complexity through modular deployment
2Measurement precision
If the interval between image pick-up portions is increased to improve measurement accuracy, then triangulation precision improves, but the device size and mounting space requirements increase
Solution Approach 1:
The measurement function is segmented across two separate stereo cameras positioned at the front and rear of the work vehicle. Each stereo camera maintains an appropriate baseline interval for accurate triangulation of its local field of view, while the combined system achieves comprehensive coverage of the entire work area, distributing the precision requirement across multiple modules
3Device complexity
If a single stereo camera is used to simplify the system, then device complexity decreases, but the measurement range and accuracy across the entire work area deteriorate
Solution Approach 1:
The measurement system is divided into two stereo cameras, each responsible for capturing topography data of a specific portion of the work area. The controller synthesizes images from both cameras to produce comprehensive and accurate topography data of the entire area, maintaining measurement precision through distributed measurement points
Solution Approach 2:
The system adds spatial distribution across the work vehicle (front and rear positions) as an additional dimension to the measurement approach. This multi-location deployment enables accurate topography mapping of the entire work area while keeping each individual camera system relatively simple
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
The apparatus accurately picks up images of the existing topography, improving productivity in construction projects by providing precise and comprehensive data, enabling better alignment with design contours and real-time monitoring of work progress.
Implementation Method 1
a first image pick-up portion and a second image pick-up portion arranged on a right side of the first image pick-up portion in a lateral direction of the vehicular main body
Implementation Method 2
based on principles of triangulation, an interval between two image pick-up portions constituting the stereo camera is desirably greater
Data Source
AI summary
A first stereo camera has a first image pick-up portion and a second image pick-up portion arranged on the right side of the first image pick-up portion in a lateral direction of a vehicular main body. A second stereo camera has a third image pick-up portion and a fourth image pick-up portion arranged on the right side of the third image pick-up portion in the lateral direction of the vehicular main body. The first image pick-up portion and the third image pick-up portion constitute a left image pick-up portion group. The second image pick-up portion and the fourth image pick-up portion constitute a right image pick-up portion group. The left image pick-up portion group and the right image pick-up portion group are arranged at a distance from each other in the lateral direction of the vehicular main body.