Electric lift table control system and method for resistance back-off
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electric lifting platforms often damage obstacles or structures, and may cause personal injury when collisions occur, as they lack effective resistance back-off mechanisms to prevent collisions before impact.
Innovation Solution
An electric lift table control system with safety gratings and a controller that detects obstacles using transmitting and receiving end assemblies, allowing the lifting column to stop or retract before encountering obstacles, and includes touch sensors for enhanced detection and reaction time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lifting platform continues moving after detecting an obstacle, then the lifting speed is maintained, but the obstacle or structure may be damaged causing harmful effects
Solution Approach 1:
The safety grating detects obstacles before the lifting platform reaches them, allowing the controller to stop the lifting column in advance. The gap between the safety grating and table provides提前 detection distance, enabling the lifting platform to halt before contact occurs, thus preventing damage while maintaining normal operation speed.
2Reliability
If a resistance back-off function is added to detect and stop before obstacles, then safety is improved, but the device complexity increases due to additional safety grating components
Solution Approach 1:
The safety grating acts as an intermediary detection device positioned between the lifting column and potential obstacles. It uses transmitting and receiving end assemblies to detect obstacles at a distance, providing early warning to the controller without requiring direct contact or complex sensors on the lifting platform itself.
Solution Approach 2:
The safety grating is divided into multiple segments with transmitting end assemblies and receiving end assemblies arranged in pairs. This segmentation allows comprehensive coverage of the detection area while using simple, modular components that can be independently positioned and adjusted, reducing overall system complexity.
3Measurement precision
If the safety grating is positioned close to the table, then detection accuracy is improved, but the reaction time is insufficient to stop before contact
Solution Approach 1:
The safety grating is positioned in a vertical gap below the table rather than horizontally adjacent to it. This dimensional arrangement allows the transmitting and receiving end assemblies to face each other across the gap, enabling accurate detection while maintaining sufficient vertical distance for the lifting column to stop before contact occurs.
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 effectively reduces the likelihood of damage to obstacles, structures, and human bodies by detecting obstacles early and controlling the lifting column to stop or retract, providing a resistance back-off function that enhances safety.
Implementation Method 1
a beam emitted by the transmitting end assembly in the safety grating can be received by the receiving end assembly
Data Source
AI summary
The present disclosure relates to the field of office furniture, and more particularly to an electric lift table control system and method that realize a resistance back-off. The system comprises a controller, a table (1) and a lifting column (2) for driving the table to move vertically, the lifting column (2) is connected with the controller signal, and further comprises at least one arranged under the table (1) a safety grating (3) for detecting obstacles, each set of safety gratings comprising a transmitting end assembly and a receiving end assembly, and a gap is provided between the safety grating (3) and the lower surface of the table (1), and said The safety light barrier (3) is connected to the controller signal. This will control the lifting column to stop working before encountering obstacles.