A weighing algorithm of luffing rope

A rope and algorithm technology is applied in the weighing field of measuring the lifting load under the crane hook according to the force of the luffing rope, which can solve the problems such as the inability of sensors to be interchanged.

Active Publication Date: 2018-01-16
宜昌凯诺电气股份有限公司
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  • 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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  • A weighing algorithm of luffing rope
  • A weighing algorithm of luffing rope
  • A weighing algorithm of luffing rope

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Embodiment Construction

[0097] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings:

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

[0099] 1) Take the hinge point O at the root of the crane boom as the circle point to establish a mechanical model. According to the principle that the resultant moment is zero when the moment is balanced, see figure 1 , Then:

[0100] Hook moment + boom center of gravity moment-luffing rope pulling moment-main rope pulling moment + ejector rod thrust moment = 0

[0101] which is:

[0102]

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

[0104]

[0105] Among them, α represents the current luffing angle, F (α) Indicates the current pulling force of the luffing rope, Indicates the arm of luffing rope, G M Indicates the weight of the boom, L M Indicates the position of the center of gravity of the boom, L Mx The moment arm representing the...

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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 torque limiter or a weighing instrument, in particular to a weighing method for measuring the lifting load under a crane hook according to the force of a luffing rope. Background technique [0002] For cranes with tire cranes and crawler cranes, because the booms are assembled in sections to change the boom length, if the torque limiter of the main rope weighing method is used, it will be difficult to retract and maintain the sensor cable. Problem, it is prone to failure, so the luffing rope weighing method is often used at present. However, the currently widely used luffing rope weighing algorithm has the following problems: [0003] 1. It is necessary to carry out continuous luffing calibration for the boom in the no-load state, continuously record the sensor output signal value in the luffing interval, and carry out one to three point weight calibration. Once the boom length has not been calibrated in a ...

Claims

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Application Information

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Patent Type & Authority Patents(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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