Method and system for controlling winch of crane to move relative to lifting arm

Abstract

The invention discloses a method and system for controlling a winch of a crane to move relative to a lifting arm. The method includes the following steps of receiving a ground mode command, controlling the distance between a hook and the ground to be unchanged according to the luffing amplitude when the lifting arm carries out luffing motions, controlling the distance between the hook and the ground to be unchanged according to the stretching and retracting lengths when the lifting arm stretches and retracts, and receiving an arm tip mode command, keeping the hook in the current state when the lifting arm carries out the luffing motions, and controlling the distance between the hook to the arm tip to be unchanged according to the stretching and retracting lengths when the lifting arm stretches and retracts. According to the method and system, four work modes are set, in the manipulation process, the distance from the hook to the arm tip or to the ground is automatically kept unchanged, and manual control is needless. Compared with background technologies, on one hand, the method and system achieve automated control and effectively avoid occurrence of hoisting accidents; on the other hand, the distance from the hook to the arm tip or to the ground is controlled to be unchanged so that the method and system are suitable for different working condition requirements, and the control effect is good.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a method and a system for controlling the hoisting of a crane to follow up with respect to a boom. Background technique [0002] The crane has a steel wire rope controlled by a hoisting mechanism. The steel wire rope is wound to the end of the boom and has a hook for lifting heavy objects. The boom can usually perform two actions of telescopic and luffing. [0003] When the boom is a cylindrical boom, the amplitude of the boom can be achieved through the expansion and contraction of the luffing cylinder; when the boom is a lattice arm, the amplitude of the boom can be achieved through the luffing winch motor, reducer and pulley Institutions achieve variable amplitude goals. [0004] The expansion and contraction of the boom is realized by the expansion and contraction of each section of the boom to change the effective length of the entire boom. [0005] During ...

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Problems solved by technology

[0009] However, Option 1 requires the operator to stop and continue the telescopic or luffing movement of the boom, and the work efficiency is extremely low; although Option 2 solves the efficiency problem to a certain extent, it requires higher operating quality of the operator

Moreover, the above two solutions all have the following technical problems: when the boom length is long and the hoisting environment is harsh, it is difficult for the operator to grasp the position of the hook, and it is even difficult to observe the hook based on the environment. It can be seen that human manipulation is obviously impossible Effectively prevent hoisting accidents

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