Elevator Current Profile Pattern Analysis for Monitoring
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Solution Overview
Problem
Current elevator monitoring systems are complex and costly to install and maintain, lacking a cost-effective and easily retrofittable solution for comprehensive monitoring of elevator components and operating states.
Innovation Solution
A method and device that determine the operating state of elevator systems by analyzing the current/time profile via a power supply line, identifying current profile segments, and comparing them to reference patterns to deduce the operating state, using sensors galvanically separated from the power supply for safe and non-intrusive installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual sensors are used to monitor each electrical consumer, then measurement precision is improved, but device complexity and installation costs increase
Solution Approach 1:
The patent merges the monitoring function from multiple individual sensors into a single sensor that measures the common power supply line. This single sensor captures the combined current consumption of all electrical consumers, which is then processed to determine the operating state of the elevator system, thereby reducing assembly complexity while maintaining monitoring capability
Solution Approach 2:
The single sensor on the power supply line serves multiple functions: it monitors the operating state of the car drive, door drives, and safety circuits simultaneously. By making the sensor universal, the system achieves comprehensive monitoring without requiring separate sensors for each component, thus reducing device complexity
2Reliability
If individual sensors are installed for each component, then monitoring reliability is improved, but installation and maintenance costs increase
Solution Approach 1:
The patent combines multiple monitoring functions into a single sensor installation on the common power supply line. This reduces the number of installation points from multiple individual sensor locations to just one, significantly lowering installation costs and complexity while maintaining the ability to monitor all electrical consumers
Solution Approach 2:
The patent extracts the monitoring function from the individual consumer circuits and places it on the common power supply line. This extraction allows a single sensor to monitor all consumers without needing to be installed in each individual circuit, reducing installation and maintenance costs
3Measurement precision
If comprehensive monitoring of all electrical consumers is implemented, then operating state determination accuracy is improved, but device complexity increases
Solution Approach 1:
The patent uses the power supply line current as an intermediary to indirectly monitor the operating state of all electrical consumers. Instead of directly sensing each consumer, the system measures the combined current on the power supply line and uses pattern recognition to determine which consumers are active, thereby achieving comprehensive monitoring without complex individual sensor installations
Solution Approach 2:
The patent replaces the mechanical/electrical system of multiple individual sensors with an electronic/software-based solution. A single sensor provides the raw data, and operating state determination is achieved through evaluating current profiles and comparing them against stored reference patterns, substituting physical monitoring complexity with computational analysis
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
Enables continuous, automated monitoring and rapid detection of failures, reducing maintenance costs and improving the accuracy and speed of determining operating states without requiring specialized personnel, while allowing for self-learning and remote maintenance.
Implementation Method 1
a sensor element (12) arranged on a power supply line (102) of the elevator system (100) and embodied to determine a current/time profile of a current strength supplied via the power supply line (102) to the elevator system (100)
Data Source
AI summary
A method and a device for determining an operating state of an elevator system include determining a current/time profile of a current supplied to the elevator system via a power supply line, identifying at least one current profile segment of the current/time profile, and deriving a current profile pattern of the identified current profile segment. The operating state of the elevator system is determined based on comparing the current profile pattern to at least one reference pattern. The method and the device may also be easily used by personnel without electrical training and may be used in elevator systems that are not known in detail.