Lift Table Safety Grating Layout for Early Obstacle Back-Off
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electric lifting platforms often damage obstacles or structures when adjusting height, and there is a risk of personal injury if a collision occurs with a human body, as existing resistance back-off systems may not react quickly enough to prevent damage.
Innovation Solution
The electric lift table control system employs safety gratings with transmitting and receiving end assemblies arranged on mounting plates around the lifting column and table, connected to a controller via touch sensors, to detect obstacles before they are encountered, allowing the system to stop or retract the lifting column.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lifting platform with resistance back-off function is used to detect obstacles, then the safety is improved, but the reaction time is insufficient causing damage before retraction can occur
Solution Approach 1:
The safety grating is positioned to detect obstacles before the lifting column reaches them, enabling preliminary detection. The system performs the detection action in advance, allowing the controller sufficient time to react and retract the lifting column before collision occurs, thus resolving the time delay issue while maintaining safety.
Solution Approach 2:
The safety grating acts as an intermediary detection device between the lifting column and the obstacle. It provides an early warning mechanism that mediates the interaction, giving the control system advance notice to prevent direct collision, thereby improving both safety and reaction time.
2Loss of time
If the safety grating is positioned closer to the lifting column to improve detection timing, then the reaction time is improved, but the detection area is reduced
Solution Approach 1:
The detection system is segmented into multiple safety gratings positioned at different locations around the lifting column. This segmentation allows each grating to cover a specific detection zone, collectively providing both early detection (through strategic positioning) and comprehensive coverage (through multiple segments), resolving the contradiction between reaction time and detection area.
Solution Approach 2:
The safety gratings are arranged in a three-dimensional configuration around the lifting column rather than in a single plane. This spatial distribution across multiple dimensions expands the effective detection area while maintaining optimal detection timing through strategic positioning at critical locations.
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 setup effectively reduces the likelihood of the table hitting obstacles by detecting them early and providing sufficient reaction time for the controller to stop or retract the lifting column, minimizing damage to obstacles, structures, and preventing injuries.
Implementation Method 1
the beam emitted by the transmitting end assembly in the safety grating can be received by the receiving end assembly
Data Source
Figure 1~2
Figure 3~4
Figure 5
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.