Elevator Positioning Using Near-Field Wireless AOA Analysis
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Solution Overview
Problem
Existing elevator positioning methods are complex, inaccurate, and costly, with a need for additional equipment investment, which complicates the timely and precise location of personnel and objects within elevator hoistways, particularly in high-rise buildings.
Innovation Solution
A spatial location positioning method using near-field wireless communication signals, such as BLE, ZIGBEE, WIFI, or RF, to transmit and analyze signal AOA information from response signals, determining the target object's location in preset areas of the elevator, including hoistways and waiting areas, with signals sent from multiple positions for enhanced accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RSSI-based positioning is used, then positioning function is achieved, but positioning accuracy and timeliness deteriorate
Solution Approach 1:
The patent replaces traditional RSSI-based positioning with ultrasonic wave-based time-of-flight measurement. The ultrasonic positioning system measures distance by calculating the time it takes for ultrasonic waves to travel between transmitter and receiver, substituting the indirect RSSI method with direct time-based measurement, thereby achieving both high accuracy and real-time performance
Solution Approach 2:
The patent changes the measurement parameter from signal strength (RSSI) to time of flight (TOF). By using the propagation time of ultrasonic waves as the measurement parameter, the system achieves more precise and timely positioning results, as time measurement provides direct distance information without the ambiguities of signal strength interpretation
2Measurement precision
If additional positioning equipment is added, then positioning function is achieved, but device complexity and cost increase
Solution Approach 1:
The patent integrates ultrasonic positioning functionality into existing elevator components. The ultrasonic transmitters are incorporated into the elevator car, and receivers are placed in the hoistway, allowing the same hardware to serve both communication and positioning functions, thereby avoiding additional dedicated positioning equipment
Solution Approach 2:
The patent combines the positioning system with the elevator's existing control and communication infrastructure. The ultrasonic positioning modules are integrated into the elevator car control system, merging multiple functions into unified components rather than adding separate standalone positioning equipment
3Measurement precision
If traditional positioning methods are used, then positioning is achieved, but operating cost increases
Solution Approach 1:
The ultrasonic positioning system uses the elevator car's own power and control systems to operate the positioning transmitters and receivers. The system leverages existing elevator power supply and control infrastructure, eliminating the need for separate power sources and reducing operational costs
Solution Approach 2:
The patent replaces energy-intensive wireless signal strength measurement with efficient ultrasonic time-of-flight measurement. The ultrasonic method requires less processing power and energy consumption for achieving the same positioning accuracy, thereby reducing operating costs
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
This method provides quick, accurate, and cost-effective location determination of target objects, enhancing safety and enabling intelligent elevator calling functions, thereby improving the competitiveness and usability of elevator systems.
Implementation Method 1
near-field wireless communication devices configured to transmit near-field wireless communication signals in preset areas of the elevator for performing near-field wireless communication with a target object
Data Source
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AI summary
The present disclosure relates to a spatial location positioning method for an elevator, a spatial location positioning system for an elevator, and an elevator. The spatial location positioning method for the elevator comprises the steps of: transmitting (S11) near-field wireless communication signals in preset areas of the elevator; receiving (S12) response signals of a target object to the near-field wireless communication signals, and analyzing signal AOA (angle of arrival) information from the response signals; and determining (S13) current location of the target object according to the signal AOA information. The solutions of the disclosure can quickly and accurately determine the current location of the target object in the elevator area, which is for example helpful in improving the personal safety of elevator maintenance personnel and the like, and realizing more intelligent functions such as seamless elevator calling.