Beam Climber Wheel Slippage Detection and Control
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Solution Overview
Problem
Elevator systems face challenges in detecting loss of friction on propulsion systems, which can lead to wheel slippage and affect the reliability and safety of elevator operations.
Innovation Solution
The implementation of sensors to detect rotational wheel speed, torque, and speed variations, coupled with a controller that activates motor brakes, guide rail brakes, and compression mechanisms to address wheel slippage by identifying low friction areas and adjusting operations accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensors and controllers are added to detect wheel slippage and friction loss, then safety and reliability are improved, but device complexity increases
Solution Approach 1:
The system performs preliminary detection of wheel slippage conditions using sensors before actual slippage occurs. The controller continuously monitors wheel rotational speed and compares it against expected values to identify potential friction loss conditions in advance, allowing preventive action to be taken before safety is compromised.
Solution Approach 2:
The system implements a feedback loop where sensors detect wheel rotational speed and torque, the controller processes this information to determine if slippage is occurring, and the system responds by adjusting motor output or activating brakes. This closed-loop feedback ensures continuous monitoring and automatic correction to maintain safety.
2Measurement precision
If multiple sensors are used to detect wheel slippage parameters, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The controller serves multiple functions: it processes data from rotational speed sensors, torque sensors, and accelerometer data; it determines whether slippage is occurring; and it controls the motor and brake systems. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in device complexity while maintaining measurement precision.
Solution Approach 2:
The system combines multiple sensor inputs (rotational speed, torque, acceleration) into a single integrated control system that processes all data together to determine wheel slippage conditions. By merging these detection functions into one coordinated system rather than separate independent systems, the patent achieves high measurement precision without proportionally increasing device complexity.
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 effectively detects wheel slippage and low friction areas, ensuring safe and reliable elevator operations by activating brakes and adjusting compression, thereby preventing accidents and maintaining system efficiency.
Implementation Method 1
A first electric motor rotates a first wheel of a beam climber system
Implementation Method 2
wheel slippage in a low friction area
Data Source
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AI summary
An elevator system (101) including: an elevator car (103) configured to travel through an elevator shaft (117); a first guide beam (111a, 111b) extending vertically through the elevator shaft (117), the first guide beam (111a, 111b) including a first surface (112a) and a second surface (112b) opposite the first surface (112a); a beam climber system (130) configured to move the elevator car (103) through the elevator shaft (101), the beam climber system (130) including: a first wheel (134a, 134b) in contact with the first surface (112a); and a first electric motor (132a, 132b) configured to rotate the first wheel (134a, 134b); and a controller (115) configured to determine wheel slippage in a low friction area (222) along the first guide beam (111a, 111b).