Door Opening Control Using Image-Based Boarding Intent Detection
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Solution Overview
Problem
Existing door controllers for elevators may cause unnecessary delays or risk user contact due to inaccurate determination of user intent to board, leading to improper door operation.
Innovation Solution
A door controller that analyzes image data to extract and evaluate moving objects approaching an opening, restricting door closure based on movement amounts and timing to prevent delays and potential impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door controller determines user intent to board based on movement speed threshold during closing operation, then the door can be controlled to remain open when user intends to board, but unnecessary delays in operation occur
Solution Approach 1:
The system performs preliminary evaluation of moving object movement amounts before the door closing operation commences. By extracting moving objects from image data and evaluating their movement amounts in advance, the system determines whether to restrict closing operation beforehand, avoiding last-minute delays while ensuring accurate response to user intent to board.
2Productivity
If the door controller forcibly closes the door when user intent to board is determined and preset allowable time has elapsed, then the door can be closed safely, but risk of user contact with door occurs
Solution Approach 1:
The system continuously monitors moving object movement amounts throughout the door closing operation using image data feedback. By comparing movement amounts against predetermined thresholds in real-time, the system can immediately restrict closing operation if a moving object approaches the door, eliminating the need for preset allowable time delays and preventing user contact while maintaining efficient door closing when safe.
3Device complexity
If the door controller uses simple movement speed threshold detection, then the system complexity is reduced, but measurement precision of user intent determination deteriorates
Solution Approach 1:
The system introduces image data as an intermediary medium between the door controller and moving objects. By extracting moving objects from image data and evaluating their movement amounts, the system achieves precise user intent detection without requiring complex additional sensors, maintaining simple control system architecture while significantly improving measurement precision.
Data Source
AI summary
A door controller including a processor, wherein the processor is configured to execute the following processing: analyze a image data according to time series, extract one or more moving objects which are moving toward a opening from within a predetermined area included in the imaging range, evaluate movement amounts of the moving objects toward the opening, restrict a closing operation of the door when it is determined that a moving object which is moving by a predetermined amount or more is present based on evaluation results of the movement amounts, and execute a closing operation of the door at a preset predetermined timing when it is determined that a moving object which is moving by a predetermined amount or more is not present and a moving object which will reach the opening before the predetermined timing is not present based on the evaluation results of the movement amounts.