Linear Induction Motor Barrier Drive with Reaction Fin
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Solution Overview
Problem
Existing gate and barrier opening and closing systems are prone to mechanical wear and breakage due to multiple moving parts, operate slowly, and lack a self-contained locking mechanism, making them inefficient and vulnerable to unauthorized access.
Innovation Solution
A magnetic propulsion system using a reaction fin attached to the barrier, powered by a linear induction motor, which eliminates moving drive components and incorporates a self-contained locking mechanism with sensors and a heating device to prevent jamming from ice or snow, allowing for faster operation and secure locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chain-drive or pinch wheel systems are used to move the barrier, then the barrier can be controlled to slide along a track, but the system involves many moving parts that wear and break, and operates slowly
Solution Approach 1:
The patent replaces traditional mechanical drive systems (chain-drive, pinch wheel) with a linear induction motor system. The motor's stator is mounted to the track and the rotor is mounted to the barrier, eliminating chains, sprockets, and pinch wheels. This substitution of mechanical components with electromagnetic propulsion directly resolves the contradiction by removing wear-prone moving parts while maintaining reliable barrier movement.
Solution Approach 2:
The patent extracts and removes the problematic intermediate mechanical components (chains, sprockets, pinch wheels) from the barrier drive system. By taking out these intermediary mechanical elements and directly coupling the motor to the barrier, the system eliminates the sources of wear and breakage while simplifying the overall device structure.
2Speed
If hydraulic cylinders are used to swing the gate, then the gate can be opened and closed, but the system opens very slowly and contains many moving parts prone to breakage
Solution Approach 1:
The patent replaces hydraulic cylinder systems with a linear induction motor system. The electromagnetic propulsion provides direct force application to the barrier without hydraulic fluid, pistons, or connecting rods. This substitution enables faster acceleration and operation speeds while eliminating the numerous moving parts in hydraulic systems that are prone to breakage and weathering.
3Reliability
If traditional locking mechanisms are used between the gate and adjacent post, then the barrier can be locked, but the system exasperates breakage problems if the gate is mistakenly left locked during operation
Solution Approach 1:
The patent implements a self-contained locking mechanism integrated into the linear induction motor system. The lock is positioned to engage with the motor assembly itself rather than requiring separate gate-to-post locking. This self-service approach provides automatic locking control through the motor controller, eliminating the need for manual locking operations that could be mistakenly left engaged, while maintaining secure barrier positioning.
4Productivity
If linear induction motors are used to propel the reaction plate, then the gate can open and close rapidly in minimum time, but the system requires precise control of acceleration and deceleration
Solution Approach 1:
The patent incorporates feedback control through sensors that detect the barrier's position and the linear induction motor's operational state. This feedback enables the motor controller to precisely regulate acceleration and deceleration rates, ensuring safe and controlled operation. The feedback system manages the complexity by providing real-time data that allows the controller to automatically adjust parameters, achieving rapid operation without sacrificing control precision.
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
The system provides faster barrier movement with reduced mechanical wear, enhanced security through a self-contained locking mechanism, and improved reliability by preventing jamming in cold weather conditions.
Implementation Method 1
The present system uses substantially no moving drive components in opening and closing the barrier. The opening and closing system of the present invention is accomplished by use of a reaction fin attached to the barrier and is magnetically propelled by a linear induction motor.
Implementation Method 2
A magnetic propulsion system using a reaction fin attached to the barrier, powered by a linear induction motor
Implementation Method 3
incorporates a self-contained locking mechanism with sensors and a heating device to prevent jamming from ice or snow
Data Source
AI summary
A system for moving a barrier protecting a restricted area. A stationary linear induction motor moves the barrier by applying a magnetic field from the linear induction motor to a reaction fin attached to the barrier. The reaction fin has a groove on each side, which is engaged with guide members to guide the barrier. Holes are evenly spaced along the length of the reaction fin. Magnetic sensors sense the holes during movement of the barrier to determine the speed, position and direction of the barrier. Current flows in the reaction fin melt ice in cold weather environments. The system is operated by a main control logic that receives input data from the electronic sensors and controls the linear induction motor, heater and locking mechanism. An inductive connection charges a storage device mounted on the barrier, which storage device powers warning signals on the barrier.