Archway Truss Layout for Accurate Cart Item Detection
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Solution Overview
Problem
Computer vision (CV) systems for item detection in moving carts or baskets are unreliable due to obstructed views and improper camera placement, leading to errors in item recognition at checkout exits.
Innovation Solution
An archway truss device with strategically positioned barrier members and multiple lanes supports a plurality of sensor devices, including cameras and RFID tag readers, to capture accurate images and data while preventing background interference, and integrates a digital display for dynamic content presentation without impeding user egress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cameras are positioned at exit to capture images of cart contents, then item detection can be performed, but the cart motion and obstructed views cause unreliable detection results
Solution Approach 1:
The archway truss is installed at the exit area to create a controlled detection zone before customers leave the store. This preliminary positioning allows cameras to capture images of cart contents in a relatively stable position, improving detection accuracy before the cart moves away and becomes difficult to track
2Measurement precision
If barrier members are added to prevent background interference, then item recognition accuracy improves, but device complexity increases
Solution Approach 1:
The archway truss is divided into multiple segments including vertical support members, horizontal cross members, and removable barrier members. This segmentation allows the structure to be assembled in a modular fashion, making it easier to manage complexity while providing the necessary background isolation for accurate item recognition
Solution Approach 2:
Barrier members are introduced as intermediary elements between the camera detection zone and the background environment. These barriers block unwanted background objects from appearing in camera fields of view, thereby improving item recognition accuracy without requiring changes to the camera system itself
3Measurement precision
If multiple sensor devices are installed on archway truss, then detection capability is enhanced, but cost and device complexity increase
Solution Approach 1:
Multiple sensor devices including cameras, RFID readers, and other detection instruments are merged into a single integrated archway truss structure. This consolidation allows all sensors to share common mounting infrastructure, power sources, and data processing pathways, reducing overall system complexity while maintaining enhanced detection capabilities
Solution Approach 2:
The archway truss is designed as a universal platform that can accommodate various types of sensor devices for different detection functions. The modular design with standardized mounting points allows the same structure to support cameras for visual detection, RFID readers for tag detection, and potentially other sensor types, making the system versatile without requiring separate structures for each function
Data Source
AI summary
Examples provide an archway truss for supporting devices, such as sensor devices generating sensor data for objects passing through the archway and a digital display device displaying dynamic content to users moving through the archway. The archway truss includes vertical support members attached to a horizontal top member. A central support member is reinforced to protect against cart impacts. Cameras are attached to the archway truss and positioned to capture images of objects in carts moving through the archway truss. Radio frequency identification (RFID) tag readers and other sensor devices are removably attached to the archway truss to gather item identification data for objects in the carts. Pairs of wing barriers are provided for each vertical support to block the field of view of the cameras from objects outside the lanes formed by the archway truss. An exterior covering provides padding to protect users contacting the archway truss.