Elevator Safety Bus Setup for Landing Door Node Mapping
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Solution Overview
Problem
Modern elevator systems face inefficiencies due to the use of multiple different communication stacks and physical layers, and the inability to easily and reliably configure elements and system nodes, particularly in identifying the location of opened safety contacts within the elevator safety chain.
Innovation Solution
Implementing an elevator safety system with a data bus, safety controller, and safety sensors at each landing floor, where the system nodes communicate status changes via the bus to link addresses with floor positions automatically, using ethernet bus segments for communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple different internal data transmission solutions are used in an elevator system, then the system can support various communication needs, but the system becomes complicated and inefficient
Solution Approach 1:
The patent combines multiple communication stacks and physical layers into a single unified data bus system. The data bus integrates serial communication capabilities with standardized protocols, allowing the elevator system to maintain support for various communication needs while eliminating the complexity of managing multiple separate transmission solutions.
Solution Approach 2:
The data bus is designed as a universal communication interface that can handle multiple types of data transmission requirements. It provides a single standardized protocol that works across different elevator system components, making the system versatile without requiring separate communication infrastructure for each function.
2Device complexity
If traditional safety contact configuration is used, then the system is simple, but it is impossible to identify which specific safety contact has opened or its physical location
Solution Approach 1:
The system implements feedback by having each safety contact equipped with a unique identifier that continuously reports its status and location to the control system. When a safety contact opens, the system receives feedback identifying exactly which contact opened and where it is physically located, enabling precise fault diagnosis while maintaining a relatively simple overall configuration.
Solution Approach 2:
Each safety contact node is configured with self-identifying information and can autonomously communicate its status and location to the central controller. This self-service capability allows the system to automatically track and identify opened safety contacts without requiring complex external configuration or manual tracking.
3Reliability
If manual configuration of safety sensors and system nodes is performed, then the setup process is thorough, but it is time-consuming and prone to human error
Solution Approach 1:
The system enables automatic configuration where safety sensors and system nodes self-identify and register themselves with the control system upon installation. Each node contains unique identifiers and location information that are automatically communicated to the controller, eliminating the need for manual configuration while ensuring accurate and reliable setup without human error.
Solution Approach 2:
Safety contacts and system nodes are pre-configured with unique identifiers and location information before installation. This preliminary action ensures that when the system is installed, the configuration data is already prepared and can be automatically uploaded to the control system, significantly reducing setup time while maintaining high reliability.
Data Source
Figure 1A~1B
Figure 2
AI summary
According to an aspect, there is provided a method for setting up an elevator safety system. The method comprises for each elevator landing: a) operating an elevator car in a setup mode; b) stopping the elevator car at an elevator landing; c) opening, by a door operator, a landing door of the elevator landing at least partially to generate a change in the status of a safety sensor disposed at the landing floor; d) detecting, with an elevator system node associated with the safety sensor, the change in the status of the safety sensor; e) communicating with the elevator system node associated with the safety sensor the changed status to a safety controller via a data bus; and f) linking, in a memory of the safety controller, an address associated with the elevator system node with a floor position determined by the means for determining the floor position of the elevator car.