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Variable-amplitude rope weighing algorithm

A technique of amplitude rope and algorithm, which is applied in the weighing field of measuring the hoisting load under the crane hook according to the force of the luffing rope, and can solve the problem that the sensors cannot be interchanged

Active Publication Date: 2017-02-15
宜昌凯诺电气股份有限公司
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the existing technology, a new luffing rope weighing algorithm is proposed to optimize the debugging steps, reduce the debugging time, solve the problem that the existing sensors cannot be interchanged, and realize the reuse of data

Method used

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Embodiment Construction

[0097] Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail:

[0098] A luffing rope weighing algorithm, comprising the following steps:

[0099] 1) Take the hinge point O at the root of the crane arm as the circle point to establish a mechanical model, and according to the principle that the resultant moment is zero when the moment is balanced, see figure 1 , then there are:

[0100] Moment of the hook + moment of the center of gravity of the boom – pulling moment of the luffing rope – pulling moment of the main rope + pushing moment of the jack rod = 0

[0101] which is:

[0102]

[0103] The formula for calculating the lifting weight G can be derived as follows:

[0104]

[0105] Among them, α represents the current luffing angle, F (α) Indicates the current luffing rope tension, Indicates the luffing rope moment arm, G M Indicates the self-weight of the boom, L M Indicates the position of the cen...

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Abstract

The invention discloses a variable-amplitude rope weighing algorithm. According to the algorithm, a moment balance theory is utilized to build a mechanical model, and parameters in the mechanical model are calibrated so that the algorithm is capable of solving the problem of interchange of a tensile sensor and realizing the requirement on repeated utilization of debugging data; meanwhile, by adopting the variable-amplitude rope weighing algorithm disclosed by the invention, the weighing measurement under all arm lengths can be realized by replacing only two arm lengths at most and requiring only two times of calibration under each working condition, so the number of mounting and dismounting times of arm levers can be greatly reduced, and the debugging period can be shortened.

Description

technical field [0001] The invention relates to a weighing algorithm of a moment limiter or a weighing instrument, in particular to a weighing method for measuring the hoisting load under the hook of a crane according to the force of a luffing rope. Background technique [0002] For cranes with tire cranes and crawler cranes, since the boom is assembled in sections to change the length of the boom, if the moment limiter with the main rope weighing method is used, it will be difficult to retract and maintain the sensor cable. Problems are prone to failure, so the luffing rope weighing method is often used at present. However, the commonly used luffing rope weighing algorithm has the following problems: [0003] 1. It is necessary to carry out continuous amplitude calibration for the boom in the no-load state, continuously record the output signal value of the sensor in the amplitude range, and perform one to three point weight calibration. Once the arm length of a certain w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C13/16G06F19/00
CPCB66C13/16G16Z99/00
Inventor 闫巍
Owner 宜昌凯诺电气股份有限公司
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