Excavator weighing method and system

Abstract

The invention relates to the field of engineering machinery, and discloses an excavator weighing method and system, and the method comprises the steps of obtaining detection parameters which comprise a bucket rod inclination angle, the thrust of a bucket oil cylinder, and a connecting rod inclination angle; on the basis of the stress balance principle, according to the detection parameters and the triangular geometric parameters of all the parts, performing stress analysis on a third hinge point formed at the hinge joint of the first connecting rod and the output end of the bucket oil cylinder, and obtaining the acting force of the first connecting rod acting on the third hinge point through calculation; on the basis of the moment balance principle, according to the acting force, the mass of the bucket, the triangular geometric parameters of all the components, the detection parameters and the position parameters of the calibration mass center of the materials in the bucket, performing stress analysis on a first hinge point formed at the hinge position of the bucket rod and the bucket, and obtaining the mass of the materials in the bucket through calculation. According to the invention, the mass of the material can be simply and accurately obtained through calculation based on the triangular geometric parameters of each component only by detecting the inclination angle of the bucket rod, the inclination angle of the connecting rod and the thrust of the bucket oil cylinder.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an excavator weighing method and a system thereof. Background technique [0002] The digging and weighing system of the excavator can quickly calculate the quality of the material excavated or loaded by the bucket within a certain period of time, and then facilitate the settlement of the construction amount and cost of the end user, so it has high practical application value. [0003] Execution units of existing excavators mainly include a boom, a boom cylinder, a stick, a stick cylinder, a bucket, a bucket cylinder, a bucket connecting rod and a stick connecting rod. In recent years, for the weighing of excavators, major OEMs and system suppliers are conducting corresponding research, but the method is nothing more than adding a pressure sensor to the boom cylinder on the basis of adding a cylinder displacement sensor or an angle sensor. Therefore, under the premi...

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Problems solved by technology

The existing weighing system and method mainly have the following problems: 1. The amount of calculation is quite large, which puts forward high requirements for the computing power of the controller of the system; 2. It installs the pressure sensor on the boom cylinder, which needs to be used in conjunction with it The number of inclination sensors is large, so the structure is complex, the cost is high, and the weighing accuracy is also reduced; 3. The excavator is moving during the excavation or loading process, and the acceleration in the middle and the fluctuation of the cylinder pressure will affect the load. The calculation results have a great impact, so the calculation accuracy is difficult to guarantee

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