Bluetooth Trajectory Prediction for Accurate Elevator Calling
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Solution Overview
Problem
Existing elevator systems face issues with invalid elevator-calling requests due to uncertainty in passenger movement, leading to inefficiencies and misjudgments in elevator assignment.
Innovation Solution
A system using a Bluetooth matrix to predict passenger movement trajectories by analyzing location information from multiple Bluetooth modules, distinguishing between calling and non-calling trajectories based on predefined intervals and ranges, and integrating this data for accurate elevator assignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If automatic elevator calling is triggered by passenger movement detection, then elevator assignment automation is improved, but misjudgment rate increases due to uncertainty in passenger intent
Solution Approach 1:
The system performs preliminary actions by establishing a Bluetooth matrix in advance and continuously monitoring passenger trajectories. When a passenger enters a preset calling range, the system begins tracking their movement pattern before they actually reach the elevator, allowing prediction of their intent based on trajectory analysis rather than waiting for explicit calling action
Solution Approach 2:
The system implements feedback by continuously acquiring location information from Bluetooth modules and comparing the passenger's actual trajectory against predefined calling and non-calling patterns. The elevator control device receives real-time trajectory data and adjusts elevator assignment decisions based on the predicted passenger intent, creating a closed-loop control system that reduces misjudgment
2Measurement precision
If elevator system monitors all passenger movements in landing area, then passenger intent detection capability is improved, but system complexity increases
Solution Approach 1:
The detection area is segmented into different zones: a larger preset calling range for initial detection and a smaller preset calling interval for confirmation. The Bluetooth matrix is divided into multiple modules distributed throughout the elevator landing area, each independently detecting and reporting passenger location, which simplifies the overall system architecture while maintaining high detection precision
Solution Approach 2:
The patent introduces Bluetooth modules as intermediary devices that passively detect passenger location through smartphone Bluetooth signals. These modules serve as mediators between the passenger and the elevator control system, converting complex movement tracking into simple location data points that are easier to process and analyze for trajectory prediction
3Measurement precision
If Bluetooth matrix uses closely spaced modules, then location detection precision is improved, but system cost and complexity increase
Solution Approach 1:
The system dynamically adjusts the effective detection resolution by varying the broadcast interval of Bluetooth modules based on passenger density and location. When passengers are sparse, modules broadcast less frequently, reducing complexity. When multiple passengers are detected or near elevator doors, the system increases monitoring intensity, optimizing the balance between precision and complexity in real-time
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
Reduces misjudgment and scheduling waste by accurately predicting passenger movement, enabling efficient elevator assignment and enhancing passenger experience.
Implementation Method 1
a plurality of Bluetooth modules arranged in an elevator landing area to form a Bluetooth matrix, wherein each Bluetooth module is configured to broadcast Bluetooth signals
Data Source
Figure 1~2
AI summary
A system and a method for detecting passenger's movement, an elevator-calling control method, a readable storage medium and an elevator system are provided by the present disclosure. The system (100) for detecting passenger's movement includes: a Bluetooth matrix (110) installed in an elevator landing area, the Bluetooth matrix (110) including at least three Bluetooth modules (111, 112, 113, 114), and each of the Bluetooth modules being configured to broadcast a Bluetooth signal to the elevator landing area respectively; wherein the system for detecting passenger's movement acquires location information of a passenger (300) carrying a personal mobile terminal by using Bluetooth signals broadcast by the at least three Bluetooth modules (111, 112, 113, 114). The system (100) for detecting passenger's movement further includes: a movement prediction unit configured to fit a movement trajectory of the passenger in the elevator landing area based on multiple sets of the location information, and predict the movement trajectory to be a calling trajectory or a non-calling trajectory. The movement trajectory of the passenger is predicted more accurately, scheduling waste is decreased, and elevator assignment is accurately implemented in advance, thereby improving passenger experience.