Measurement device for swing angle of multi-sling bridge crane and measurement method adopting device

Abstract

The invention discloses a measurement device for the swing angle of a multi-sling bridge crane. The multi-sling bridge crane comprises a bridge crane trolley provided with first lifting ropes. The measurement device for the swing angle of the multi-sling bridge crane is characterized in that the measurement device comprises a swing angle calculation and control computer, a fan-shaped plane infrared light emitter, a swing angle detection camera, lifting rope vertex markers and a video image processor; the fan-shaped plane infrared light emitter is used for emitting fan-shaped infrared light, and the light encounters one or more of the first lifting ropes, so that light spots are left; the swing angle detection camera is used for shooting images of the first lifting ropes; the video image processor is used for receiving the images of the first lifting ropes and finding the positions of the light spots and the lifting rope vertex markers; the swing angle calculation and control computer, the fan-shaped plane infrared light emitter and the video image processor are arranged on a second lifting rope, and the second lifting rope moves along with moving of the bridge crane trolley; and the swing angle calculation and control computer works out the position coordinates of the light spots and the lifting rope vertex markers, and thus a swing angle value is obtained. By adoption of the measurement device for the swing angle of the multi-sling bridge crane, the swing angle of the bridge crane can be detected accurately, and the measurement device has the advantages of being low in cost and high in antijamming capability.

Description

technical field [0001] The invention relates to a device for measuring the pendulum angle of a multi-slinger bridge and a method for measuring using the device. Background technique [0002] An overhead crane is a mechanical device used for handling heavy objects, and is widely used in docks, marine industries, and construction sites. At present, container cargo occupies a large proportion of the cargo throughput of the port terminal, and because the two spreaders of the double-slinger bridge crane can work at the same time, it undoubtedly improves the working efficiency of the bridge crane; and with the With the passage of time, the total amount of port cargo and the quantity of container cargo are constantly increasing, and the bridge crane, which is famous for its advantages of large loading and unloading capacity and convenient operation, will also become more widely used in the loading and unloading of container cargo. However, because the cargo carried by the bridge c...

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Problems solved by technology

[0003] At present, the swing angle detection of bridge cranes mostly uses physical detection devices, such as photoelectric code discs and voltage sensors. These devices only detect the swing angle of a single spreader, and cannot detect the swing angle of multiple spreaders at the same time

What's more, on-site container crane operators directly measure the size of the swing angle based on visual inspection and load movement, which not only fails to obtain accurate measurement results, but also brings great hidden dangers to the work, which greatly affects the quality of the work. efficiency and quality

In addition, most of the bridge cranes with a single lifting system are operated manually, either without using the swing angle measuring device, or without visually displaying the swing of the spreader and the load to the container operator, or just installing some mechanical anti-corrosion There are shaking devices and electronic anti-swaying devices, but none of them can fundamentally realize the automatic control of bridge crane operation

In recent reports, some institutions have carried out research and application on load anti-sway and load positioning control of single-sling bridge cranes. In these bridge crane control systems, relatively complex physical structure detection devices, such as laser angle These detection devices are not only expensive, but also have complex structures, poor anti-interference ability, inconvenient maintenance, or there is a dead zone that cannot detect small angle changes. The earth limits the application of the angle detection device

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