Elevator Call Validation Using Sensor Feedback
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Solution Overview
Problem
Elevator systems face inefficiencies due to erroneous passenger calls, which reduce transport capacity and increase waiting times, as these calls are often served as valid, leading to unfair service distribution and potential malicious use.
Innovation Solution
An elevator system and method that identifies and corrects erroneous calls by using observation means such as cameras and proximity sensors to assess passenger behavior, allowing for the removal or rectification of calls based on criteria like time windows and group sizes, ensuring accurate call data and optimizing elevator service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all registered calls are served as valid calls, then all passenger requests are fulfilled, but transport capacity is reduced and waiting times increase due to erroneous calls
Solution Approach 1:
The system performs preliminary assessment of calls before they are executed by analyzing passenger behavior patterns, time windows between calls, and group size consistency. This preliminary action identifies and flags erroneous calls before they consume elevator resources, thereby maintaining transport capacity while ensuring call accuracy.
Solution Approach 2:
The system implements feedback loops where observation data from cameras and sensors is continuously analyzed to validate calls. The control system receives feedback about passenger behavior and adjusts call validation accordingly, removing erroneous calls from the service queue while preserving valid calls, thus resolving the contradiction between reliability and productivity.
2Measurement precision
If observation means are added to identify erroneous calls, then call accuracy improves, but device complexity increases
Solution Approach 1:
The system uses multi-functional observation means (cameras and sensors) that serve multiple purposes: monitoring passenger behavior for call validation, counting group sizes, and tracking movement patterns. This universal approach improves measurement precision without proportionally increasing device complexity, as the same hardware performs multiple assessment functions.
Solution Approach 2:
The control system automatically analyzes observation data and makes decisions about call validity without requiring manual intervention. The system self-regulates by comparing observed behavior against predefined criteria, thereby improving detection accuracy while minimizing the operational complexity burden on the overall system.
3Productivity
If corrective actions are taken to remove erroneous calls, then transport efficiency improves, but service fairness may be affected if valid calls are mistakenly removed
Solution Approach 1:
The system applies partial correction by only removing calls that meet specific erroneous patterns (e.g., rapid successive calls, inconsistent group sizes, abnormal behavior patterns). By being selective rather than blanket in its corrections, the system maintains elevator efficiency while preserving service fairness for legitimate passengers whose calls do not match erroneous patterns.
Solution Approach 2:
The system continuously monitors the effects of corrective actions and adjusts its validation criteria based on feedback. If valid calls are mistakenly removed, the feedback mechanism allows the system to refine its detection algorithms, thereby maintaining both efficiency and fairness over time through iterative improvement.
Data Source
AI summary
Method for handling erroneous calls in an elevator system, which includes at least one elevator, call-giving devices for registering calls on the floor levels and/or in the elevator car, and also a control system that responds to the aforementioned calls. One or more calls given by a passenger are registered, it is assessed on the basis of at least one criterion whether some call is erroneous, and at least one corrective action is performed for removing a call, or for rectifying the call data of a call, if the call is ascertained to be erroneous on the basis of the aforementioned criterion.