Lifting System Load Detection via Pressure Sensor Segmentation
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Solution Overview
Problem
Existing electrohydraulic lifting systems lack the ability to set specific pressure sensors for loads and monitor the transition from initial contact to full load bearing, leading to potential accidents during the lifting phase, especially in vehicles with rigid structures.
Innovation Solution
A method and device for monitoring lifting systems that utilize pressure sensors to detect a preset minimum load, allowing individual lifting devices to gently engage with the load, store a reference value for further lifting, and ensure synchronized movement, with adjustable displacement distances and tolerance ranges to prevent accidents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure sensors are used to detect load contact in existing electrohydraulic lifting systems, then load detection capability is provided, but the system cannot set specific pressure thresholds for loads and cannot monitor the transition phase from initial contact to full load bearing
Solution Approach 1:
The lifting operation is divided into distinct phases: starting phase where individual lifting devices are activated until minimum load is detected, and load-detection phase where synchronized lifting occurs with continuous monitoring. This segmentation allows targeted safety measures for each phase, particularly monitoring the critical transition period between initial contact and full load bearing.
Solution Approach 2:
Pressure sensors continuously provide feedback signals to the control means during both starting and load-detection phases. The control means uses this feedback to monitor load fractions and detect deviations from expected values, enabling real-time safety monitoring during the critical lifting transition phase.
2Stability of the object's composition
If lifting devices are activated jointly from the beginning, then synchronized lifting is achieved, but individual load engagement cannot be ensured leading to potential accidents
Solution Approach 1:
Before synchronized lifting begins, a starting phase is executed where each lifting device is individually activated and monitored until it independently detects the minimum load fraction. This preliminary action ensures proper load engagement for each device before the synchronized load-detection phase commences, preventing safety accidents during the transition.
3Reliability
If pressure sensors monitor full lifting operation continuously, then safety monitoring is improved, but system complexity and cost increase
Solution Approach 1:
Instead of continuous monitoring throughout the entire lifting operation, the system applies enhanced monitoring specifically during the critical starting phase and load-detection phase. Once the load-detection phase completes and reference values are stored, the monitoring intensity is reduced, optimizing the balance between safety and system 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
Enhances safety by monitoring the lifting operation from initial contact to full load bearing, preventing accidents by ensuring consistent load distribution and immediate fault detection, adaptable to various load weights and vehicle types.
Implementation Method 1
the load fraction acting on the load-bearing means is sensed by a pressure sensor of the lifting unit
Data Source
AI summary
The invention relates to a method and a device for monitoring a lifting system (11) for lifting loads, particularly vehicles, in which for lifting a load (14), the lifting movement is initiated by a starting phase, and lifting devices (12) are individually driven in the starting phase. Load holding means (18) of the lifting devices (12) are raised until a pre-set minimum load is detected by the pressure sensor (24), and the load holding means (18) are raised by a pre-selectable displacement distance in a load recognition phase of the lifting process following the starting phase, and after the pre-selected displacement distance is passed through, a load inquiry is carried out and the determined load is stored as a reference value for the further lifting process.