Crane motion control
First Claim
1. A crane motion detection system, comprising:
- a camera configured to mount on a trolley of a crane;
a marker configured to mount on a block of the crane within a field of view of the camera; and
a controller coupled to the camera to receive data from the camera, and coupled to the crane to control operation of the crane in response to camera data;
wherein the controller is configured to control operation of at least one of detecting and preventing off center lifts with the block, detecting and preventing snagging of a block, and auto-centering the crane over a block.
4 Assignments
0 Petitions
Accused Products
Abstract
Methods of detection and prevention for snags or off center lifts, and auto-centering a crane over a load. Snag detection includes monitoring angular deflection of the load with respect to an at-rest position, and halting movement of the crane in a direction of increasing angular deflection. Controlling off center lifting includes detecting a side load condition for a load, and preventing a hoist operation when the side load condition is detected. Auto-centering a load includes determining a position of a block coupled to the load with respect to a trolley of the crane, and centering the trolley over the block prior to a moving operation. Centering includes comparing a position of a block marker using a trolley camera to a known centered position of the marker with respect to the camera, and moving the trolley to match the determined position of the marker to its known centered position.
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Citations
11 Claims
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1. A crane motion detection system, comprising:
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a camera configured to mount on a trolley of a crane; a marker configured to mount on a block of the crane within a field of view of the camera; and a controller coupled to the camera to receive data from the camera, and coupled to the crane to control operation of the crane in response to camera data; wherein the controller is configured to control operation of at least one of detecting and preventing off center lifts with the block, detecting and preventing snagging of a block, and auto-centering the crane over a block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification