Elevator Car Movement Monitoring With Verified Ride Event Detection
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Solution Overview
Problem
Existing elevator car movement monitoring systems face challenges in accurately detecting the start and end of elevator rides, particularly in two-speed systems, leading to incorrect measurement data and unreliable maintenance needs determination.
Innovation Solution
An elevator car movement monitoring system utilizing an accelerometer and data collection unit to detect elevator car events, with verification actions to ensure accurate detection of ride start and end, including duration, direction, and state verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If movement data is measured only when the elevator car is moving, then energy consumption is reduced, but measurement precision deteriorates due to incorrect detection of ride start and end events
Solution Approach 1:
The system performs preliminary actions by detecting ride start and end events using acceleration data before initiating the measurement process. The verification actions check whether the detected events correspond to actual ride boundaries, ensuring measurements are taken during complete rides. This preliminary detection and verification mechanism prevents incorrect measurements while allowing the system to remain inactive during stationary periods, thus reducing energy consumption.
2Measurement precision
If verification actions are implemented to verify correct detection of ride events, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system implements feedback mechanisms where verification actions continuously check the detected ride events against expected patterns. The data collection unit receives acceleration data, detects ride events, performs verification actions to validate the detections, and adjusts subsequent measurements based on the verification results. This feedback loop ensures high measurement precision by confirming that measurements correspond to complete rides, while the verification logic is integrated into the existing data processing pipeline to minimize additional complexity.
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
Improves the reliability of elevator car movement monitoring by ensuring correct detection of ride events, reducing incorrect data and enhancing maintenance decision-making.
Implementation Method 1
an accelerometer attached to an elevator car and configured to produce acceleration data representing acceleration of the elevator car
Data Source
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AI summary
The invention relates to an elevator car movement monitoring system (200). The elevator car movement monitoring system (200) comprises an accelerometer (202) and a data collection unit (204). The Accelerometer (202) is attached to an elevator car (102) and configured to produce acceleration representing acceleration of the elevator car (102). The data collection unit (204) is configured to: obtain the acceleration data from the accelerometer (202); detect an elevator car start event and an elevator car stop event from the acceleration data, wherein the acceleration data between the detected elevator car start event and the detected elevator car stop event represents elevator ride acceleration data; and execute at least one verification action to verify a correct detection the elevator car start event and/or the elevator car stop event. The invention relates also to a method for monitoring elevator car movement and to an elevator system (100).