Elevator Door Vibration Sensing for Accurate Floor Detection
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Solution Overview
Problem
Existing elevator detection systems for determining the floor based on vibration profiles are inefficient and lack accuracy due to improper mounting and alignment of sensors, leading to unreliable floor detection.
Innovation Solution
A detection device for elevators that integrates an accelerometer with a light grid, where the accelerometer is mounted on the cabin door strips, creating a vibration profile during opening and closing movements, and compares it with stored reference profiles to determine the floor, ensuring precise alignment and improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If vibration sensors are mounted separately from the light grid, then installation is simpler, but sensor positioning accuracy and alignment are poor
Solution Approach 1:
The accelerometer is integrated into the light grid assembly, specifically mounted on the transmitter strip or receiver strip. This merging of previously separate components ensures precise and consistent positioning of the accelerometer relative to the door edge, eliminating alignment issues while maintaining ease of installation as a single integrated unit.
2Device complexity
If accelerometers are not integrated with the light grid, then device complexity is lower, but detection reliability is poor
Solution Approach 1:
The accelerometer is integrated into the light grid assembly, specifically mounted on the transmitter strip or receiver strip. This merging of previously separate components ensures precise and consistent positioning of the accelerometer relative to the door edge, eliminating alignment issues while maintaining ease of installation as a single integrated unit.
3Ease of operation
If vibration detection starts without external trigger signals, then system operation is simpler, but detection timing precision is poor
Solution Approach 1:
The system uses feedback from the light grid's distance detection capability to trigger vibration recording. When the light grid detects a specific distance value corresponding to door movement, it automatically triggers the accelerometer to start recording. This feedback mechanism ensures precise timing without requiring complex external trigger systems.
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 integrated solution enhances sensor positioning, improving detection accuracy and reliability by aligning accelerometers with the light grid, allowing for precise floor determination without additional external inputs.
Implementation Method 1
at least one accelerometer for detecting the vibration of the cabin door during the opening movement and/or the closing movement
Implementation Method 2
the light grid is designed to detect the distance between the transmitter strip and the receiver strip, in particular from the detection of the received intensity
Data Source
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AI summary
Detection device for an elevator with a cabin having at least one cabin door, designed to perform an opening and a closing movement when the cabin stops at a floor, for determining the floor when the elevator cabin stops at that floor. The detection device includes at least one accelerometer for detecting the vibration of the cabin door during the opening and/or closing movement.The detection device includes an evaluation unit configured to create a vibration profile from the vibration detected during an opening and/or closing movement. During a learning phase, the device creates and stores a reference vibration profile for each of at least two floors from one or more existing vibration profiles. Outside of the learning phase, the currently recorded vibration profile is compared with the existing reference vibration profiles, and the reference vibration profile that best matches the currently recorded vibration profile is determined from this comparison. The corresponding floor is then identified. The detection device also includes a light grid for detecting an object in the area of an open cabin door. This grid comprises a transmitter strip and a receiver strip, with at least one of the strips being designed for mounting on the cabin door.Furthermore, at least one accelerometer is arranged on the transmitter strip or receiver strip, which is designed for attachment to the cabin door.