Elevator Hoistway Technician Warning via Wireless Location Detection
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Solution Overview
Problem
Elevator technicians face safety risks when working in elevator hoistways, as existing systems lack effective methods to warn them of potential dangers within the work area, such as proximity to moving parts or confined spaces.
Innovation Solution
A system that uses wireless signals, like Bluetooth, to detect the location of a technician's device and convey safety instructions or activate alarms when they enter a designated work area, providing audio, pictorial, or textual warnings based on their location within the elevator shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless signal detection is used to monitor technician location, then safety warning capability is improved, but device complexity increases
Solution Approach 1:
The sensor system performs multiple functions: it detects technician presence, determines location within the hoistway, triggers safety warnings, and provides instructional guidance. By consolidating these functions into a single integrated system, the patent improves safety capability without proportionally increasing complexity.
Solution Approach 2:
The patent introduces a sensor as an intermediary device that mediates between the technician's mobile device and the safety warning system. The sensor detects wireless signals from the technician's device and relays location information to the control system, which then activates appropriate warnings. This intermediary approach enables sophisticated safety monitoring while keeping individual components relatively simple.
2Reliability
If location-specific safety instructions are provided, then safety effectiveness is improved, but information processing complexity increases
Solution Approach 1:
The patent implements location-specific safety instructions by dividing the hoistway into different zones (e.g., near the car, near the pit, intermediate areas). Each zone has predetermined safety instructions tailored to its specific hazards. When the sensor detects the technician's location, the system activates only the relevant instructions for that specific area, improving safety effectiveness while managing information processing complexity through spatial segmentation.
3Reliability
If continuous monitoring of technician position is implemented, then accident prevention capability is improved, but energy consumption increases
Solution Approach 1:
The system implements periodic monitoring by having the sensor detect wireless signals from the technician's mobile device at regular intervals or upon signal transmission. Rather than continuous real-time tracking, the system checks position periodically when the technician's device emits signals, maintaining accident prevention capability while significantly reducing energy consumption compared to continuous monitoring.
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 system effectively warns technicians of potential hazards, enhancing their safety by providing location-specific safety instructions and alerts, thereby reducing the risk of accidents within the elevator hoistway.
Implementation Method 1
detecting a wireless signal emitted by at least one of a sensor and a user device
Implementation Method 2
measuring a strength of the wireless signal, wherein the distance between the sensor and the user device is determined in response to the strength of the wireless signal
Data Source
AI summary
A method of warning a technician is provided. The method comprising: detecting a wireless signal emitted by at least one of a sensor and a user device; determining a distance between the sensor and the user device in response to the wireless signal; determining whether the user device is within a work area in response to the distance between the sensor and the user device; and conveying safety instructions through an application installed on the user device when the user device is determined to be within the work area.