Elevator Sensor Assembly for Object Detection and Sag Compensation
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Solution Overview
Problem
Existing elevator systems require separate devices for door obstruction detection, people counting, load detection, and releveling control, which can be cumbersome and inefficient.
Innovation Solution
A sensor assembly that uses LIDAR, millimeter wave RADAR, or RGBD cameras to monitor the elevator car door opening, determining the number of objects, load, and detecting door obstructions, communicating this information to the elevator controller to optimize operations and perform sag compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate devices are used for door obstruction detection, people counting, load detection, and releveling control, then each function can be performed reliably, but the device complexity and cost increase
Solution Approach 1:
The patent combines door obstruction detection, people counting, load detection, and releveling control functions into a single sensor assembly. This single device performs multiple functions that previously required separate devices, thereby reducing system complexity while maintaining the reliability of each individual function through integrated sensing and processing capabilities.
Solution Approach 2:
The sensor assembly is designed as a universal device capable of performing multiple functions: detecting door obstructions, counting people, measuring load, and enabling releveling control. This multi-functional approach eliminates the need for separate specialized devices for each function, reducing the overall number of components in the elevator system.
2Reliability
If multiple separate systems are deployed, then comprehensive monitoring is achieved, but the system maintenance and operation become more difficult
Solution Approach 1:
By merging multiple monitoring functions into a single sensor assembly, the system reduces the number of components that need to be installed, configured, and maintained. This integration simplifies operational procedures while preserving comprehensive monitoring capabilities across all elevator functions.
3Reliability
If separate devices are used for each function, then each device can be optimized for its specific task, but the overall system cost and installation complexity increase
Solution Approach 1:
The patent integrates multiple detection and control functions into a single sensor assembly, reducing installation complexity by requiring only one device installation location and connection point. This merging maintains detection accuracy for each function while eliminating the need for multiple separate installations and configurations.
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 integrated solution enhances elevator operation efficiency by optimizing dispatching, group control, and sag compensation, while reducing the need for multiple devices and improving safety by providing real-time object detection and load monitoring.
Implementation Method 1
the sensor includes at least one of a LIDAR sensor, a millimeter wave RADAR sensor and an RGBD camera
Implementation Method 2
the sensor includes at least one of a LIDAR sensor, a millimeter wave RADAR sensor and an RGBD camera
Data Source
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AI summary
An elevator system including a hoistway; an elevator car configured to travel in the hoistway; a landing having a landing door; a sensor assembly configured to monitor a field of view overlapping a door opening of the landing door; the sensor assembly configured to perform at least one of (i) determine a number of objects in the elevator car, (ii) determine a load of objects in the elevator car and (iii) detect a door obstruction.