System, method and device for detecting length of released ropes of winch and crane

Abstract

The invention relates to the technical field of engineering machines, and discloses a system, method and device for detecting the length of released ropes of a winch and a crane. The detection system comprises a tilt angle sensor, a released rope turn number detection device and a control device. The tilt angle sensor is used for detecting the current swing angle of a rope pressing device, and the current swing angle corresponds to the rotating radius of the kth layer of steel wire ropes outside a winch roller. The released rope turn number detection device is used for detecting the number of turns of the released ropes of the kth layer of steel wire ropes. The control device is respectively in signal connection with the tilt angle sensor and the released rope turn number detection device and used for obtaining the released rope length of the kth layer of steel wire ropes according to the current swing angle of the rope pressing device and the number of the turns of the released ropes of the kth layer of steel wire ropes and obtaining the total released rope length of the winch according to the released rope length of the kth layer of steel wire ropes and the number of layers of the released ropes of the winch. According to the technical scheme, the detection precision of the released rope length of the winch can be improved, and then the suspended load accuracy is improved.

Description

Technical field [0001] The present invention relates to the technical field of engineering machinery, in particular to a hoisting rope laying length detection system, method, device and a crane. Background technique [0002] During the operation of the crane, the length of the wire rope hoisted by the crane (referred to as the hoisting rope length) is a very important parameter. Under different working conditions of the crane, the length of the hoisting rope has a very important influence on the carrying capacity of the wire rope and the lifting performance of the crane. Therefore, it is very necessary to detect and control the length of the hoisting rope. [0003] Such as figure 1 As shown, figure 1 It is a schematic diagram of the structure of an existing hoisting rope length detection system. The detection system includes a rotary encoder 72 arranged on the hoisting shaft 71 at the side end of the hoisting. The rotary encoder 72 is used to detect the number of turns of the hois...

AI Technical Summary

Problems solved by technology

[0005] The defect of the prior art is that the radius of rotation of a certain layer of steel wire ropes on the winch is taken as the radius of rotation of all layers of steel wire ropes, resulting in errors in the calculation of the length of the ropes of the winch, especially when the number of layers of steel wire ropes on the winch increases. More, the longer the length of the rope is, the greater the error will be

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