Elevator Jumper Monitoring for Safety Chain Bypass Alerts
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Solution Overview
Problem
Existing bridge devices in elevators pose safety hazards due to unintentionally left jumpers, which bypass safety-relevant components, necessitating a safer and more reliable method for monitoring and alerting technicians during maintenance.
Innovation Solution
A bridge device with a monitoring means and alarm unit that generates an alarm signal if the jumper is left in place longer than a predefined time, using electrical current sensing and wireless communication to alert technicians or control the elevator to prevent unsafe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional jumper is used to bypass protection devices during maintenance, then troubleshooting and testing can be performed, but the safety chain is broken and technicians may forget to remove the jumper causing safety hazards
Solution Approach 1:
The monitoring means is activated before maintenance work begins to detect the insertion of the jumper. It continuously monitors during the maintenance process and provides reminders at critical moments (start of maintenance, half-time, end of maintenance) to ensure the jumper is removed promptly, preventing safety hazards from occurring
Solution Approach 2:
The system provides real-time feedback through visual and audible signals when a jumper is detected. The monitoring means continuously reports the status of the safety chain and reminds technicians to remove the jumper, creating a feedback loop that maintains awareness of the bypassed safety chain throughout the maintenance process
2Reliability
If monitoring means is added to detect jumper usage, then safety risks are reduced, but the device complexity increases
Solution Approach 1:
The monitoring means serves multiple functions: it detects jumper insertion, provides real-time alerts, tracks maintenance duration, and sends notifications to remote centers. By consolidating these functions into a single integrated unit, the patent avoids adding multiple separate devices while maintaining safety chain integrity
Solution Approach 2:
The monitoring means automatically detects when a jumper is inserted and initiates monitoring without requiring manual activation. The system self-monitors the safety chain status and provides reminders autonomously, reducing the need for complex manual monitoring procedures while maintaining reliability
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
Ensures safe elevator operation by promptly alerting technicians to remove jumpers, reducing the risk of safety chain bypass during normal operation, and enabling remote monitoring and control.
Implementation Method 1
The monitoring means comprises an electrical current sensor for measuring an electrical current through the jumper
Implementation Method 2
an alarm unit which is capable of generating an alarm signal if the monitoring means determines that the element has been bridged by the jumper longer than a predefined time period
Data Source
AI summary
A bridge device and a bridging method are used to monitor an elevator. The bridge device includes a jumper for bridging an electric element of the elevator when the elevator works in a first operating mode, a monitoring means monitoring the jumper, and an alarm unit that generates an alarm signal if the monitoring means determines that the element has been bridged by the jumper longer than a predefined time period when the elevator is operated in a second operating mode.