Laser Plane Passage Uniqueness Control System
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Solution Overview
Problem
Existing passage control systems face challenges in ensuring uniqueness of passage while being invisible and accessible only in the closed position, and they restrict user movement by limiting information availability and imposing specific passage methods, especially in areas without doors or with doors kept open.
Innovation Solution
A method and system using two sets of distance measurement assemblies on opposite sides of a passage zone, emitting and detecting electromagnetic radiation to calculate the thickness of a target, determining compliance with a unique passage using the equation E = D - (D1 + D2), allowing for flexible passage control without prohibited zones and enhanced information processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If infrared emitting cells are used for monitoring, then passage detection capability is improved, but installation flexibility deteriorates due to security requirements and positioning constraints
Solution Approach 1:
The patent replaces traditional infrared emitting cells with a laser scanner that projects a laser plane through the door opening. This substitution allows the system to maintain reliable passage detection while eliminating the security and positioning constraints of physical emitting cells, enabling installation in various locations without requiring secure enclosed positions or specific opposite-side arrangements
Solution Approach 2:
The patent introduces a beam splitter and camera system as intermediaries to detect the laser plane. Instead of using direct infrared emitting and receiving cells that require specific positioning, the system uses a laser plane as an intermediary reference that can be detected by a camera, providing flexible installation options while maintaining detection reliability
2Object-affected harmful factors
If monitoring means are arranged in the ceiling for visibility control, then invisibility when door is closed is improved, but accessibility and information completeness deteriorate
Solution Approach 1:
The patent transitions from ceiling-mounted 2D monitoring to a 3D laser plane projection system. The laser scanner projects a planar beam through the door opening, creating a volumetric detection field that provides complete spatial information about passage while maintaining invisibility when the door is closed. This dimensional change enables both visibility control and comprehensive information capture
3Device complexity
If only infrared beam occultation information is used, then device simplicity is improved, but passage control flexibility deteriorates due to limited information and imposed passage methods
Solution Approach 1:
The patent implements dynamic passage control by analyzing the temporal characteristics of laser plane interruptions. Instead of simple beam occultation detection, the system measures the duration, pattern, and sequence of interruptions to distinguish between authorized and unauthorized passage, enabling flexible passage control policies while maintaining relatively simple device architecture
Solution Approach 2:
The patent incorporates feedback mechanisms that analyze laser plane interruption patterns and provide real-time passage validation. The system uses the detected interruption characteristics to dynamically adjust passage control decisions, enabling flexible authorization policies while maintaining device simplicity through intelligent processing of laser plane data
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
Enables flexible and secure passage control in any space, including areas without doors, by providing comprehensive information and ensuring only authorized individuals pass, while being invisible and accessible only in the closed position.
Implementation Method 1
a first measuring assembly (1) and a second measuring assembly (1') arranged facing each other on opposite sides of said zone of passage (Z) across the latter, each comprising at least one distance measuring device (1a, 1b, 1c, 1d or 1'a, 1'b, 1'c, 1'd) capable of emitting electromagnetic radiation and of detecting said radiation reflected by a target (C)
Implementation Method 2
detecting said radiation reflected by a target (C) to measure a distance between said device and the target
Data Source
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AI summary
The present invention relates to a method for controlling the uniqueness of passage in or through a controlled access zone, such as a doorway or corridor passage in a building. It consists, starting from a uniqueness control system, of essentially triggering a distance measurement step between the device(s) (1a, 1b, 1c) and the target (C) to derive a distance measurement information, followed by a step of processing the distance measurement information by an electronic management device to determine a success or failure result for uniqueness of passage as determined by said device. It also relates to a uniqueness control system enabling the implementation of said method and a access zone device equipped with such a system.