Elevator Wireless Communication Reliability During Power Outages
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Solution Overview
Problem
Conventional wired communication systems in elevator systems are unreliable during emergency situations such as power outages, failing to ensure consistent communication between passengers and responsible personnel.
Innovation Solution
A wireless communication system is implemented in elevator systems, comprising a user interface module, first and second wireless communication modules, and a control module that attempts to establish connections through different wireless networks (GSM, LTE, LPWAN, LoRaWAN, WiFi, and Bluetooth) to facilitate communication between passengers and management centers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wired communication system is used in the elevator system, then the communication system can be established, but the communication system fails to work reliably in emergency situations such as power outages
Solution Approach 1:
The communication system dynamically switches between wired and wireless communication modes based on system status. During normal operation, the wired communication module is used. During emergencies, the system automatically transitions to wireless communication modules (WiFi, Bluetooth, cellular) to maintain communication reliability when the wired system fails.
Solution Approach 2:
The system changes communication parameters by switching from a fixed wired connection to multiple wireless communication protocols. The control module detects communication failures and changes the communication mode parameter, enabling the system to adapt to different operational conditions and maintain reliability during emergencies.
2Reliability
If a single wireless communication module is used, then the device complexity is reduced, but the communication reliability during emergencies is insufficient
Solution Approach 1:
The communication system is segmented into multiple independent wireless communication modules, each capable of operating on different wireless protocols (WiFi, Bluetooth, cellular). This segmentation allows the system to attempt multiple communication channels independently, improving reliability without requiring a single complex multi-protocol module.
Solution Approach 2:
Multiple wireless communication modules with different protocols are combined in parallel within the elevator system. The control module manages these modules and attempts to establish communication through each one, merging their capabilities to achieve higher overall communication reliability than any single module could provide.
3Reliability
If multiple wireless communication networks are used, then the communication reliability is improved, but the device complexity increases
Solution Approach 1:
The control module implements self-service by automatically detecting which wireless communication network is available and functional, then autonomously selecting and establishing communication through the appropriate module without requiring manual intervention or complex external configuration.
Solution Approach 2:
The system uses feedback mechanisms where the control module continuously monitors the status of each wireless communication module and the success of communication attempts. Based on this feedback, the control module dynamically adjusts which modules are active and in what order they are attempted, optimizing the balance between reliability and complexity.
Data Source
AI summary
The invention relates to a system and a method of wireless communication for emergency in an elevator system. The wireless communication system comprises the user interface module providing a user interface for a passenger in the elevator car; a first wireless communication module configured to make a first wireless connection with a communication device through a first wireless communication network; a second wireless communication module configured to make a second wireless connection with the communication device through a second wireless communication network; and a control module configured to control the first and second wireless communication modules to set up the first wireless connection and/or the second wireless connection, upon receiving the passenger's input through the user interface module.