Elevator Motion Detection Using Gravitational Force Sensing
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Solution Overview
Problem
Existing elevator system installation methods pose a safety hazard due to silent movement of components during installation, as existing motion detection systems rely on mechanical movement monitoring rather than gravitational force detection.
Innovation Solution
A motion detection device with a housing, sensor, and controller that senses gravitational force to detect movement, providing visual and audible alerts through an indicator, and is removably connectable to elevator components via magnets, allowing orientation flexibility and extended power operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical movement monitoring is used to detect unsafe conditions, then existing systems can monitor component movement, but they fail to detect silent movement accurately creating safety hazards
Solution Approach 1:
The patent replaces mechanical movement monitoring with gravitational force sensing using accelerometers. The sensors detect changes in gravitational force vectors caused by component movement, eliminating the need for direct mechanical contact or movement-based triggers. This substitution enables detection of silent movement that mechanical systems cannot perceive.
Solution Approach 2:
The patent introduces gravitational force as an intermediary field between the moving components and the detection system. Instead of directly monitoring mechanical movement, the system senses the gravitational force changes that occur when components move, using this intermediary field to indirectly detect motion and trigger safety warnings.
2Measurement precision
If sensors are fixed in specific orientations, then measurement accuracy is improved, but adaptability to different installation positions is reduced
Solution Approach 1:
The patent makes the sensor orientation dynamic by allowing the housing to rotate and reorient itself. The sensors are arranged to detect gravitational force in multiple directions, and the housing can be installed in various orientations while maintaining detection capability. This dynamic adaptability allows the system to maintain measurement precision regardless of installation position.
Solution Approach 2:
The patent designs the sensor system to perform multiple detection functions regardless of orientation. The accelerometers are configured to measure gravitational force changes in three-dimensional space, enabling the same device to accurately detect movement whether installed vertically, horizontally, or at any intermediate angle, thus achieving universal adaptability.
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
Enhances safety by accurately detecting movement without relying on mechanical signals, providing timely warnings to personnel and improving installation safety by using gravitational force sensing technology.
Implementation Method 1
at least one sensor arranged within the housing, the at least one sensor configured to sense data in response to a gravitational force acting thereon
Data Source
AI summary
Disclosed is a motion detection device for monitoring movement of a component comprising a housing removably connectable to the component; an indicator arranged within the housing, the indicator being operable to indicate movement of the component; at least one sensor arranged within the housing, the at least one sensor configured to sense data in response to a gravitational force acting thereon; and a controller operably coupled to the at least one sensor and the indicator, the controller including an algorithm configured to determine when the motion detection device is moving and to operate the indicator when the motion detection device is moving.