Lifting Apparatus Control Method for Highly-Mounted Device Safety
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Solution Overview
Problem
Conventional automatic lifting devices for highly-mounted lights lack accurate control over the coupling and separation of the main body and lifting body, leading to potential safety accidents due to improper winding or unwinding of the wire rope.
Innovation Solution
A control method and apparatus that utilize contact points, guide rolls, and limit switches to ensure proper coupling and separation by checking the weight applied to the wire rope, with the driving motor controlled to prevent accidents and ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If conventional automatic lifting device operates without coupling detection, then automation is improved, but safety and reliability deteriorate due to improper wire rope winding
Solution Approach 1:
The system performs preliminary detection of the coupling state between the lifting body and main body before initiating wire rope winding or unwinding operations. The detection unit checks whether the lifting body is properly coupled to the main body, and only allows automatic lifting operations to proceed when proper coupling is confirmed, preventing unsafe operations
Solution Approach 2:
The system implements a feedback mechanism where the detection unit continuously monitors the coupling state and provides information to the control unit. The control unit adjusts the automatic lifting operations based on this feedback, stopping or preventing operations when improper coupling is detected, thus maintaining safety while preserving automation
2Reliability
If coupling detection system is added, then safety and reliability are improved, but device complexity increases
Solution Approach 1:
The detection unit is integrated into the existing control system of the lifting device, serving multiple functions: detecting coupling state, controlling wire rope winding/unwinding, and preventing unsafe operations. This multi-functionality approach adds safety capabilities while minimizing the increase in device complexity by reusing existing system components
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
Prevents safety accidents by ensuring accurate coupling and separation of the main body and lifting body, enhancing the reliability and safety of the lifting process for highly-mounted devices.
Implementation Method 1
a driving motor configured to automatically wind unwind the wire rope on the drum according to the selection of a user to move the light fitting upward or downward
Implementation Method 2
a wire rope having one end fixed on an upper side of the light fitting and the other end provided on a drum
Data Source
AI summary
Disclosed is a control method of a lifting apparatus for a highly-mounted device. The control method includes (a) outputting a descending signal in a state where the main body and the lifting body are coupled; (b) determining whether the lifting body is normally released downward from the main body according to the descending signal; and (c) stopping the driving motor or executing the step (a) again when the lifting body is not normally released downward, wherein in the step (b), it is determined whether the lifting body is normally released downward from the main body by checking whether a weight of the lifting body is applied to the wire rope.