Elevator Safety System Error Ratio Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing elevator safety system is unable to detect all signal errors, particularly in noisy environments, and is limited by excessive use of error detection codes which increase processing load, and has a restricted data capacity.
Innovation Solution
An elevator safety system with multiple communication controllers that measure network error ratios before starting safety communication, allowing operation state switching based on these measurements to ensure reliable communication and reduce wire quantity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If error detection codes are used to detect signal errors, then communication reliability is improved, but processing load increases excessively
Solution Approach 1:
The system changes the parameter of error detection from using complex error detection codes to measuring error ratios through bit error detection. This parameter change reduces processing load while maintaining communication reliability by using a simpler, more efficient error measurement approach.
Solution Approach 2:
The invention extracts the essential error detection function from complex error detection codes and implements it through bit error measurement and error ratio calculation. This extraction simplifies the system while preserving the core reliability function.
2Reliability
If error detection codes are designed for severe noise environments, then communication reliability in noisy environments is improved, but data capacity is reduced
Solution Approach 1:
The system dynamically adjusts communication parameters based on measured error ratios rather than using fixed error detection codes designed for severe noise environments. This dynamic approach allows optimal data capacity utilization while maintaining reliability across varying noise conditions.
3Reliability
If individual equipment is connected to control panel with separate wires, then connection reliability is improved, but quantity of wires increases
Solution Approach 1:
The invention merges multiple individual connections into a single bus-based communication network. Equipment is connected to a bus node rather than individually to the control panel, significantly reducing wire quantity while maintaining connection reliability through error ratio measurement and monitoring.
Data Source
AI summary
Provided is an elevator safety system including: a plurality of communication controllers configured to communicate, over a network, signals including a safety control signal; a control device connected to a first communication controller, which is one of the plurality of communication controllers, and configured to execute operation control of the elevator, in which each of the plurality of communication controllers includes an error ratio measurement instrument configured to measure an error ratio of the network, based on a bit error of data that is received over the network, and in which the control device is configured to execute the operation control by switching the operation state of the elevator in accordance with the error ratio measured by the error ratio measurement instrument that is included in the first communication controller.