Crane Boom Angle Control for Diagonal Pull Compensation
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Solution Overview
Problem
Existing crane systems face challenges in automatically compensating for diagonal pull during load lifting, leading to oscillations and potential safety hazards due to deformation of the crane's geometry, which current methods fail to address comprehensively.
Innovation Solution
An apparatus equipped with sensors to detect crane deformation and a control/regulation system that adjusts the boom drive to maintain constant sensor values, thereby minimizing diagonal pull by controlling the boom angle and length, and/or trolley movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the load is raised from the ground, then the lifting operation proceeds, but diagonal pull occurs causing load oscillation and safety hazards
Solution Approach 1:
The control device performs preliminary detection of the boom angle before the load is fully raised. Based on the detected angle deviation, the control device pre-adjusts the boom position to compensate for expected diagonal pull, preventing load oscillation before it occurs during the lifting operation.
Solution Approach 2:
The system continuously detects the actual boom angle using a sensor and compares it with the reference boom angle. The control device receives this feedback and automatically adjusts the boom position to minimize angle deviation, thereby preventing diagonal pull and maintaining load stability throughout the lifting operation.
2Reliability
If manual correction of boom angle is performed by the crane operator, then diagonal pull compensation is possible, but operational complexity increases and comprehensive deformation detection is limited
Solution Approach 1:
The control device automatically performs diagonal pull compensation by detecting the boom angle deviation and adjusting the boom position without requiring manual intervention from the crane operator. The system serves itself by using the sensor data to trigger automatic corrective actions, simplifying the operator's task while maintaining reliable compensation.
Solution Approach 2:
The sensor continuously provides feedback on the actual boom angle to the control device, which automatically compares it with the reference angle and adjusts the boom position accordingly. This closed-loop feedback system eliminates the need for manual correction while ensuring comprehensive and accurate diagonal pull compensation.
3Reliability
If the boom angle is adjusted to compensate for diagonal pull, then load stability improves, but the crane geometry deformation is not fully addressed
Solution Approach 1:
The sensor continuously monitors the actual boom angle and provides feedback to the control device, which compares it with the reference angle. This feedback mechanism enables precise detection of geometry deviations and automatic adjustment of the boom position to compensate for deformation, thereby improving both load stability and geometric precision.
Solution Approach 2:
The system changes the boom position parameter dynamically based on the detected angle deviation. By adjusting the boom angle in real-time according to the sensor feedback, the system compensates for geometry deformation and maintains both load stability and structural precision throughout the lifting operation.
Data Source
AI summary
The invention relates to an apparatus for compensating diagonal pull in cranes having at least one boom, having a boom drive for adjusting an angle and/or a length of the boom and/or for traveling a trolley, and having a control/regulation apparatus for controlling/regulating the boom drive. The invention is further directed to a crane having a corresponding apparatus.