Wireless Signal Strength Detection for Hands-Free Elevator Calling
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Solution Overview
Problem
Existing elevator systems face difficulties in automatic calling operations, especially for passengers who cannot use both hands, leading to ineffective calls and reduced user experience.
Innovation Solution
An automatic elevator calling system using wireless signal modules in both elevator cars and landing areas, which determine passenger movement by signal strength changes, allowing for hand-free operation through Bluetooth Low Energy connections and intelligent terminal communication with the elevator controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual button pressing is used for elevator calling, then the system is simple and reliable, but it becomes difficult to operate when passengers cannot use both hands
Solution Approach 1:
The system uses the passenger's own mobile terminal to automatically detect presence and trigger elevator calling, eliminating the need for manual button pressing. The mobile terminal serves itself to perform the calling function based on detected signal strength changes.
Solution Approach 2:
The mechanical button pressing action is replaced by wireless signal detection and automatic electronic control. The system substitutes physical interaction with electromagnetic field-based detection using wireless signal modules.
2Ease of operation
If automatic elevator calling using smart mobile terminal is implemented, then hands-free operation is achieved, but ineffective elevator calling may occur due to uncertainty of passenger action or movement
Solution Approach 1:
The system continuously monitors wireless signal strength changes to detect passenger movement status. By providing feedback on signal strength variations, the system can distinguish between passengers who are genuinely waiting for the elevator and those who are merely passing by, thereby avoiding ineffective calls.
Solution Approach 2:
The system dynamically adjusts its detection criteria based on real-time signal strength changes. Instead of using static thresholds, it monitors the rate and pattern of signal changes to determine actual passenger intent, making the calling decision process adaptive and reliable.
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
Enables efficient and user-friendly automatic elevator calling, reducing ineffective operations and improving passenger experience by accurately determining passenger movements and canceling or suspending requests when necessary.
Implementation Method 1
a first wireless signal module installed in an elevator car is configured to broadcast a first wireless signal; wherein the first wireless signal module is further configured to receive information about movement of the passenger relative to an elevator landing area, and the information about the movement is determined based on a change in a signal strength of the first wireless signal received by a personal mobile terminal carried by the passenger
Data Source
AI summary
The present invention relates to determining the movement of a passenger relative to an elevator landing area, which belongs to the field of elevator intelligent control technologies. An automatic elevator calling system of the present invention comprises: a first wireless signal module installed in an elevator car, which is used for broadcasting a first wireless signal; wherein the first wireless signal module is further used for receiving information regarding the movement of a passenger relative to the elevator car, and the information regarding the movement is determined based on the change in a signal strength of the first wireless signal received by a personal mobile terminal carried by the passenger.