Elevator Cabin Door Locking System Position Detection
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Solution Overview
Problem
Existing elevator systems require high material and assembly costs for locking car doors due to the use of stationary magnets in tall buildings, which is inefficient and costly.
Innovation Solution
A locking system that uses a position detection device to continuously monitor the elevator car's position relative to the elevator track and activate the locking mechanism only when the car is in a stop zone, eliminating the need for magnets by comparing measured car positions with stored stop zone limit values, and utilizing an electrically controllable lifting magnet for automated switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stationary magnets are attached in the elevator shaft to detect stop zones, then the locking device can be activated at the correct position, but the material and assembly effort increases significantly
Solution Approach 1:
The patent removes the stationary magnets from the elevator shaft and extracts only the essential function of position detection. Instead of physical magnets throughout the shaft, a single continuous measuring tape with coding is used, which is much simpler to install and maintain while achieving the same position detection reliability.
Solution Approach 2:
The patent creates a coded representation of position information on a measuring tape instead of using physical magnets at each stop zone. The coding on the tape (magnetic, optical, or other detectable signals) copies the position data that would otherwise require physical magnets to provide, reducing material and assembly complexity.
2Reliability
If magnets are used to indicate stop zones, then the locking system can function reliably, but the system complexity and hardware adjustment requirements increase
Solution Approach 1:
The patent makes the stop zone positions dynamic and reconfigurable through software programming rather than fixed physical magnet positions. The control device can be programmed with different stop zone locations and limit values, allowing flexible adaptation to different building configurations without physical hardware changes.
Solution Approach 2:
The patent changes the system from fixed physical parameters (magnet positions) to programmable parameters (software-defined stop zones). The limit values for stop zones are stored in the control device and can be adjusted by changing software parameters rather than physically relocating magnets.
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 solution reduces material and assembly costs by eliminating the need for magnets, allows for easy reprogramming of door opening times without hardware adjustments, and ensures reliable locking and unlocking operations, enhancing safety and efficiency.
Implementation Method 1
the position detection device includes a measuring tape with a coding that extends over the entire length of the elevator track, and a detector that is attached to the elevator car and that detects the coding of the measuring tape
Implementation Method 2
The coding of the measuring tape is preferably designed in such a way that absolute values of the position of the elevator car can be detected by the detector
Data Source
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AI summary
The invention relates to a locking system for locking and unlocking a cabin door of a lift cabin (11) of a lift system (10), in which lift system (10) the lift cabin (11) can travel along a lift track having stopping points and associated stopping point zones. The locking system comprises a lock mechanism (28), which can be brought into a locking position and into an unlocking position, wherein the cabin door in the locking position of the locking mechanism (28) is immobilised in the closed position of the cabin door and can be opened in the unlocking position of the locking mechanism (28), an actuator (16) by which the locking mechanism (28) can be brought either into locking position of the locking mechanism or into the unlocking position of the locking mechanism, a control device (22) which causes the actuator (16) to bring the locking mechanism (28) into the unlocking position of the locking mechanism when at least the condition that the lift cabin (11) is located in the region of a stopping point zone is met. The locking system is characterised in that the lift system (10) comprises a position detecting device (27), which continuously detects a position of the lift cabin (11) relative to the lift track and communicates the position to the control unit (22), and the control unit (22) continuously detects whether the condition that the lift cabin (11) is located in the region of a stopping point zone is met, by comparing the position of the lift cabin (11) communicated by the position detecting device (27) to stored position limit values of the stopping point zones.