Decentralized Elevator Door Wireless Controller
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Solution Overview
Problem
Traditional elevator door control systems require extensive and costly wiring for centralized control, which is labor-intensive and prone to connection faults, and do not account for variations in door size and mass for smooth operation.
Innovation Solution
A decentralized elevator door control system with separate controllers at each landing and on the elevator car, using wireless communication to monitor and control door conditions, eliminating the need for hoistway control wires and allowing for custom acceleration and deceleration profiles through variable voltage, variable frequency electronic drives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centralized control with dedicated signal wires is used, then control reliability is improved, but installation cost and complexity increase significantly
Solution Approach 1:
The patent replaces the mechanical wiring system with a wireless communication system. Door controllers at each landing and on the car communicate door status, commands, and control signals wirelessly instead of using dedicated signal wires, thereby eliminating the complex wiring infrastructure while maintaining control functionality.
Solution Approach 2:
The patent divides the centralized control system into decentralized door controllers located at each landing and on the elevator car. Each controller operates independently, making local control decisions based on wireless communications, which reduces the need for extensive interconnecting wiring between the machine room and various door locations.
2Ease of operation
If individual door control with custom acceleration profiles is implemented, then door operation smoothness is improved, but control system complexity increases
Solution Approach 1:
The patent implements dynamic control by allowing each door controller to operate with custom acceleration and speed profiles tailored to specific door characteristics. The controllers can adjust operational parameters in real-time based on door mass, size, and position feedback, enabling smooth operation despite variations in door properties.
Solution Approach 2:
The patent changes control parameters by allowing individual door controllers to have customizable acceleration and speed profiles. These parameters can be adjusted according to the specific door being controlled, enabling optimized performance for each door without requiring a completely different control system for each door type.
3Ease of manufacture
If decentralized door controllers are used, then installation cost is reduced, but communication reliability may worsen
Solution Approach 1:
The patent implements feedback mechanisms where door controllers continuously monitor door status, position, and operational parameters, and communicate this information wirelessly to other controllers and the elevator control system. This feedback loop ensures reliable coordination between decentralized controllers and enables real-time adjustments to maintain system reliability.
Solution Approach 2:
The patent creates universal door controllers that can function in multiple roles - controlling local doors, communicating with other controllers, receiving commands from the elevator control system, and coordinating with car doors. This multi-functionality is achieved through wireless communication protocols that replace the need for extensive dedicated wiring infrastructure.
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 solution reduces installation costs, simplifies troubleshooting, and enables smooth, trouble-free operation of doors with customizable speed profiles, accommodating varying door sizes and masses, while maintaining plug-and-play interchangeability of controllers.
Implementation Method 1
The token is passed wirelessly, i.e. by radio transmission, sequentially from one landing to the next adjacent landing up the hoistway and then down
Implementation Method 2
They may each produce a variable voltage variable frequency source, preferably three phase power from a single phase utility source
Data Source
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AI summary
Control systems and methods for operating the doors of an elevator where the control logic is distributed in local car and landing door controllers that communicate wirelessly with one another to eliminate door control signal wiring in the hoistway thereby simplifying installation and diagnostics and affording door motor control that is individualized for each door.