Elevator Door Maintenance Detection via Hoistway Pressure Variance
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Solution Overview
Problem
Elevator systems require frequent physical inspections to determine repair needs, which can be time-consuming and inefficient, especially in identifying maintenance requirements for door systems within passageways.
Innovation Solution
A method using pressure sensors to detect pressure data along passageways, comparing it to benchmark data, and identifying maintenance requirements by determining pressure variances, which activates alarms and adjusts air pressure as needed, allowing for remote monitoring and maintenance scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical inspections are conducted frequently to determine repair needs, then maintenance reliability is improved, but time consumption and operational disruption increase
Solution Approach 1:
The patent replaces manual physical inspection with an automated pressure sensing system. Pressure sensors mounted on the elevator car continuously monitor pressure variations in the hoistway, automatically identifying door system maintenance needs without requiring technician presence. This substitution of mechanical inspection with electronic sensing resolves the contradiction by maintaining high reliability through continuous monitoring while eliminating time loss associated with frequent physical inspections.
Solution Approach 2:
The system enables the elevator door system to effectively inspect itself by measuring pressure variations caused by door gaps. The pressure sensor data automatically indicates when door systems require maintenance, allowing the system to self-diagnose without external intervention. This self-service approach maintains reliability while minimizing inspection time and operational disruption.
2Measurement precision
If physical inspections are conducted to identify maintenance requirements, then detection accuracy is improved, but system complexity and operational disruption increase
Solution Approach 1:
The patent extracts the essential diagnostic function from complex physical inspection procedures. By isolating the pressure measurement parameter as the key indicator of door system health, the system achieves high detection accuracy through a single, simple measurement mechanism rather than multiple complex inspection steps. This extraction of the critical diagnostic element resolves the contradiction between accuracy and complexity.
Solution Approach 2:
The system monitors changes in pressure parameters to detect maintenance needs. By tracking pressure variations as the elevator car moves through different floors and comparing them to expected values, the system achieves precise detection of door system issues. This parameter-based approach maintains high measurement precision while keeping the system relatively simple, as it relies on monitoring a single physical parameter rather than multiple inspection procedures.
3Ease of manufacture
If manual inspection methods are used to determine repair needs, then implementation simplicity is maintained, but productivity and response time deteriorate
Solution Approach 1:
The patent replaces manual inspection methods with automated pressure sensing and electronic data processing. The system continuously collects pressure data, automatically compares it to benchmark values, and instantly identifies maintenance requirements without human intervention. This substitution dramatically improves productivity and response time while maintaining implementation simplicity, as the automated system processes information faster than manual methods and can be integrated into existing elevator control infrastructure.
Solution Approach 2:
The system implements continuous feedback by constantly monitoring pressure sensor data and immediately comparing it to expected values. When deviations indicate maintenance needs, the system instantly generates alerts or notifications. This real-time feedback mechanism dramatically improves maintenance response productivity compared to periodic manual inspections, while the feedback loop remains relatively simple to implement through standard electronic sensing and processing components.
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
This approach enables efficient detection of maintenance needs in elevator systems, reducing the need for frequent physical inspections and enabling proactive maintenance, thereby improving system reliability and reducing downtime.
Implementation Method 1
detecting pressure data for at least one or more locations along a passageway using a pressure sensor
Data Source
AI summary
A method of detecting maintenance requirements of a system for conveying a car through a passageway is provided. The method comprising: detecting pressure data for at least one or more locations along a passageway using a pressure sensor; comparing the pressure data to benchmark pressure data for each of the one or more locations; determining a pressure data variance at a first location of the one or more locations in response to the pressure data and the benchmark pressure data; and identifying an identity of a car stop location door system located at the first location when the pressure data variance is greater than a selected tolerance.