Laser Plane Positioning for Elevator Shaft Alignment
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Solution Overview
Problem
In high-rise buildings, accurately measuring and aligning guide rails and installation platforms within elevator shafts is challenging due to the need for precise positioning and alignment, especially when the hoisting height exceeds 75 meters, where mechanical methods may fail to provide reliable and stable measurements.
Innovation Solution
The use of two perpendicular laser transmitters at the bottom of the elevator shaft and at least four primary light-sensitive detectors on the installation platform allows for precise measurement of the platform's position by determining the intersection points of the laser planes, enabling accurate alignment and positioning of guide rails and installation of robotic systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mechanical measurement methods are used in high-rise buildings with hoisting height over 75 meters, then the measurement system becomes complex and unreliable, but the patent introduces an optical measurement system using laser transmitters and light-sensitive detectors to achieve precise positioning
Solution Approach 1:
The patent replaces complex mechanical measurement systems with an optical measurement system using laser transmitters and light-sensitive detectors. The laser transmitters project vertical laser planes that intersect with detectors on the installation platform, providing precise positioning data without the complexity and unreliability of mechanical measurement methods in high-rise buildings over 75 meters tall.
Solution Approach 2:
The patent introduces laser planes as an intermediary medium between the measurement system and the installation platform. The vertical laser planes created by the transmitters serve as reference surfaces that intersect with the light-sensitive detectors, enabling indirect but highly accurate position measurement without direct mechanical contact or complex mechanical linkages.
2Manufacturing precision
If traditional alignment methods are used for guide rails in high-rise buildings, then alignment precision deteriorates due to building bends and movements, but the patent uses laser planes as reference to maintain accurate alignment
Solution Approach 1:
The laser planes serve as stable intermediary reference surfaces that are immune to building bends and movements. By projecting vertical laser planes from fixed transmitters at the bottom of the shaft, the system creates reliable reference surfaces that maintain their geometric integrity regardless of structural deformations, enabling consistent alignment accuracy throughout the installation process.
Solution Approach 2:
The patent transitions from traditional one-dimensional linear alignment methods to a two-dimensional plane-based reference system. The vertical laser planes provide a surface reference rather than a line reference, adding dimensional stability and enabling more robust alignment measurements that can compensate for building movements and bends in multiple directions.
3Productivity
If manual installation methods are used for guide rails, then installation time increases and productivity decreases, but the patent enables robotic installation through precise positioning
Solution Approach 1:
The light-sensitive detectors continuously measure the position of the installation platform relative to the laser planes and provide feedback data. This real-time positioning information enables robotic systems to automatically adjust their operations, maintain precise alignment during installation, and compensate for any deviations, thereby achieving high-speed automated installation without sacrificing accuracy.
Solution Approach 2:
The patent replaces manual mechanical installation operations with automated robotic systems guided by optical measurement feedback. The laser-based positioning system provides the digital reference framework that enables robots to perform installation tasks with precision previously achievable only through manual methods, dramatically increasing installation speed and productivity.
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
This method provides precise 2D and potentially 5D positioning of the installation platform, ensuring smooth elevator operation and enabling robotic installation of guide rails, even in high-rise buildings, by compensating for building bends and movements, thus ensuring accurate alignment and stable ride quality.
Implementation Method 1
two laser transmitters arranged at a bottom of the elevator shaft, each of said two laser transmitters producing a vertical upwards directed laser plane in the elevator shaft
Implementation Method 2
at least four primary light sensitive detectors are attached to the installation platform so that they are visible to the laser transmitters, measuring the position of the installation platform from the hitting points of the laser planes on the primary light sensitive detectors
Data Source
Figure 1
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AI summary
The arrangement comprises an installation platform arranged to be movable upwards and downwards in a first direction (S1) in the elevator shaft (20), two laser transmitters (210, 220) arranged at a bottom (12) of the elevator shaft (20), each of said two laser transmitters (210, 220) producing a vertical upwards directed laser plane (LP1, LP2) in the elevator shaft (20), said laser planes (LP1, LP2) being perpendicular to each other, at least four primary light sensitive detectors (310, 320, 330, 340) are attached to the installation platform (100) so that they are visible to the laser transmitters (210, 220), each of the primary light sensitive detectors (310, 320, 330, 340) being positioned on a respective side of a rectangle. The position of the installation platform (100) in relation to the elevator shaft (20) can be measured from the hitting points of the laser planes (LP1, LP2) on the primary light sensitive detectors (310, 320, 330, 340).