Elevator Door Position Detection Using Segmented Marking Units
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Solution Overview
Problem
Existing elevator position determination systems face challenges in accurate installation and maintenance, particularly in three-dimensional structures where inaccuracies during construction or settlement can lead to incorrect position information, and sensors are often exposed to high loads and require specialized installation.
Innovation Solution
The position determination apparatus is designed with a marking unit on one of the shaft doors and a detection unit on the associated car door, allowing for pre-installation or retrofitting, reducing installation costs and risks, and featuring a control unit for synchronized door movement, along with recesses and optical sensors for precise position detection and safety features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the position determination apparatus is installed during construction, then accurate position information can be obtained, but installation costs increase and installation time is consumed
Solution Approach 1:
The marking unit is pre-installed on the shaft door during shaft construction, and the detection unit is pre-installed on the car door during car assembly. This preliminary action allows the position determination apparatus to be ready for use without requiring complex on-site installation adjustments, thus maintaining accuracy while reducing installation time.
2Measurement precision
If the detection unit is installed on the car door, then the marking unit on the shaft door can be read accurately, but the sensor is exposed to high loads and may be damaged
Solution Approach 1:
The detection unit is protected by the car door structure itself, which acts as a cushioning barrier. The door provides mechanical protection against high loads and environmental factors while still allowing the optical sensor to read the marking unit on the shaft door accurately.
3Measurement precision
If the marking unit and detection unit are positioned on opposite sides of the shaft opening, then accurate position determination is achieved, but the installation becomes more complex
Solution Approach 1:
The position determination apparatus is segmented into two independent parts: the marking unit on the shaft door and the detection unit on the car door. This segmentation allows each component to be installed separately during their respective construction phases, simplifying the overall installation process while maintaining accurate position determination when the car is at the shaft opening.
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 configuration enables accurate and cost-effective installation, reduces sensor damage, simplifies the installation process, and enhances safety by allowing precise position determination and synchronized door control, while also providing a space-saving design for the marking and detection units.
Implementation Method 1
a detection unit (14) for at least one of detecting and reading the marking unit
Data Source
AI summary
An elevator apparatus including a position determination apparatus for determining the position of an elevator car inside an elevator shaft, the position determining apparatus including a marking unit for marking a position of the elevator car, and a detection unit for detecting the marking unit, the marking unit being arranged on one of the shaft doors and the detection unit being arranged on the associated car door or vice versa for the purpose of improved installation.