Access Gate 3D Cameras for Compact Volumetric Detection
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Solution Overview
Problem
Access gate devices using curtain of light type sensors require a large footprint, necessitating substantial space, which is inefficient and impractical for many applications.
Innovation Solution
Employing 3D cameras to define volumetric detection zones and control access, reducing the physical space required by eliminating the need for physical sidewalls and sensors, while using 3D depth data to detect user presence and control access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If curtain of light type sensors are used to detect users, then user detection capability is achieved, but the footprint of the access gate device becomes substantially large
Solution Approach 1:
The patent replaces mechanical curtain of light sensors with a 3D camera system that captures depth data to define volumetric detection zones. This substitution eliminates the need for physical sensor arrays and sidewalls, reducing the device footprint while maintaining user detection capability through 3D spatial mapping and depth-based presence detection.
Solution Approach 2:
The patent transitions from 2D planar detection zones to 3D volumetric detection zones by utilizing depth information from 3D cameras. This dimensional enhancement allows the system to detect users within a volume of space rather than requiring a large 2D footprint, enabling compact device design while preserving detection reliability.
2Reliability
If physical sidewalls and curtain of light sensors are used, then user detection is reliable, but the device requires substantial space and is impractical for many applications
Solution Approach 1:
The patent replaces physical sidewalls and curtain sensors with a 3D camera-based system that defines virtual volumetric detection zones. This eliminates the need for bulky physical structures, making the access gate device adaptable to various environments including spaces with limited footprint requirements.
Solution Approach 2:
The 3D camera system serves multiple functions: it captures depth data for defining volumetric detection zones, detects user presence within these zones, and enables access control decisions. This multi-functionality replaces multiple separate components (sidewalls, curtain sensors, detection logic) with a single integrated system, enhancing adaptability across different application scenarios.
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 solution significantly reduces the footprint of access gate devices, enabling more compact designs and preventing tailgating by effectively detecting users in a smaller area, thus optimizing space utilization and security.
Implementation Method 1
one or more three-dimensional (3D) cameras arranged at least on an entry side of the access gate device, each of the one or more 3D cameras is configured to provide 3D depth data of a view range of said 3D camera
Data Source
AI summary
An access gate device includes one or more 3D cameras arranged at least on an entry side of the access gate device and a control unit. Each of the one or more 3D cameras is configured to provide 3D depth data of a view range of said 3D camera. The control unit is configured to: define at least two consecutive volumetric detection zones in front of the access gate device at least on the entry side, detect a presence of at least one user inside at least one of the volumetric detection zones on the entry side based on the 3D depth data obtained from at least one of the at least one or more 3D cameras arranged on the entry side, and generate detection data in response to the detection of the presence of the at least one user for controlling access of users via the access gate device. A method for controlling an access gate device is also disclosed.