Radio Frequency Elevator Shaft Detection
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Solution Overview
Problem
Conventional security measures fail to detect individuals in elevator shafts and on elevator car roofs, leading to potential crushing risks, and load weighting devices only provide static passenger estimates, lacking real-time monitoring capabilities.
Innovation Solution
Implementing radio frequency sensors attached to elevator cars or counterweights to transmit and receive signals, allowing for real-time identification of persons in elevator shafts, cars, and at landings, enabling controlled elevator operation and passenger counting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional security measures are used, then the system structure remains simple, but the ability to detect persons in hazardous areas is insufficient
Solution Approach 1:
The patent replaces conventional mechanical security measures (such as physical barriers, switches, and contact-based sensors) with radio frequency sensing technology. The radio frequency sensor detects persons in hazardous areas through electromagnetic wave reflection without requiring mechanical contact or complex mechanical structures, thereby improving detection capability while avoiding increased mechanical system complexity
Solution Approach 2:
The patent introduces radio frequency signals as an intermediary medium to detect persons in hazardous areas. Instead of direct mechanical or electrical contact between the detection system and the monitored environment, the system uses radio frequency waves that can penetrate and reflect off objects without physical interaction, enabling reliable detection while maintaining system simplicity
2Measurement precision
If load weighting devices are used for passenger estimation, then the device structure remains simple, but the measurement precision is static and insufficient
Solution Approach 1:
The patent merges the functions of the load weighting device with the radio frequency sensor system. By combining weight-based passenger estimation with radio frequency-based presence and positioning detection, the system achieves more accurate and dynamic passenger information without requiring completely separate measurement systems, thus improving measurement precision while controlling overall system complexity
Solution Approach 2:
The radio frequency sensor system performs multiple functions: it detects persons in hazardous areas, estimates the number of passengers in the elevator car, and provides real-time positioning information. This multi-functional approach replaces the need for separate specialized devices, improving measurement precision across multiple parameters while avoiding proportional increases in system complexity
3Reliability
If real-time monitoring of persons in hazardous areas is implemented, then safety is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical monitoring systems (such as cameras, microphones, or contact-based safety switches) with radio frequency sensing. The radio frequency sensor can detect the presence and movement of persons in hazardous areas through electromagnetic wave reflection patterns, providing real-time safety monitoring without the mechanical complexity of traditional systems
Solution Approach 2:
The radio frequency sensor system performs self-detection by transmitting signals and analyzing their own reflections from objects in the hazardous areas. The system uses its transmitted radio frequency signals as both the probing mechanism and the detection medium, eliminating the need for separate detection apparatus and reducing overall system complexity while maintaining real-time safety monitoring capability
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 preventing crushing risks, providing real-time monitoring of individuals in hazardous areas, and improving passenger counting accuracy for efficient elevator allocation.
Implementation Method 1
The radio frequency sensor transmits radio frequency signals and receives reflected signals from at least one object
Data Source
AI summary
According to an aspect, there is provided a method for controlling an elevator system. The method comprises causing transmission of radio frequency signals with at least one radio frequency sensor attached to at least one element movable in an elevator shaft of an elevator system, receiving, from the at least one radio frequency sensor measurement data representing radio frequency signals reflected from at least one object and captured with the at least one radio frequency sensor, causing identification, based on the measurement data, of at least one object; and controlling operation of the elevator system in response to identifying the at least one object based on the measurement data.