Elevator Door Vibration Detection via Accelerometer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing safety devices for elevators that monitor the elevator car via camera can raise legal issues related to data protection and require significant computing power, making them costly and inefficient.
Innovation Solution
A safety device for elevators that uses an accelerometer to detect vibrations in the car door, a pre-evaluation device to determine shaking based on threshold values, and a server to analyze and weight vibration signals, thereby minimizing data transmission and avoiding legal issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If camera-based monitoring is used to detect vandalism, then detection capability is improved, but data protection legal issues arise and computing power requirements increase
Solution Approach 1:
The patent extracts only the essential vibration data from the complete monitoring scenario, using an accelerometer to detect door vibrations and transmitting only these minimal data points to the server, thereby avoiding the need to process and store large amounts of video data while maintaining vandalism detection capability
Solution Approach 2:
The patent replaces the optical/mechanical camera-based monitoring system with a sensor-based vibration detection system, substituting complex image processing with simpler acceleration data analysis that requires minimal computing power and generates no data protection legal issues
2Measurement precision
If camera-based monitoring is used to detect vandalism, then detection capability is improved, but computing power requirements and costs increase
Solution Approach 1:
The system extracts and transmits only essential vibration data from the door, avoiding the high computing power requirements of processing complete video streams while maintaining the ability to detect vandalism events
Solution Approach 2:
The patent employs simple, low-cost acceleration sensors instead of expensive camera systems and complex processing infrastructure, using inexpensive components that consume minimal energy to achieve the detection function
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
The solution effectively reduces data transmission, avoids legal issues related to data protection, and allows for cost-effective operation with reduced computing power, while still detecting vandalism towards the elevator door.
Implementation Method 1
an accelerometer for detecting the vibration of the car door
Data Source
Figure 1
AI summary
Safety device for an elevator with an elevator car with a car door with an accelerometer for detecting the vibration of the car door, with a pre-evaluation device for determining a shaking of the car door based on the comparison of the detected vibration with at least one threshold value, with a transmission device for transmitting vibration signals based on the detected vibration to a server, and with a server for analyzing the vibration signals, wherein the pre-evaluation device is spatially connected to the elevator car, the transmission device transmits the vibration signals when the pre-evaluation device detects a shaking and the server is spatially separated from the elevator and weights the transmitted vibration signals and, depending on the weighting, stores and/or outputs the information for the probable cause of the shaking.