System for automatically identifying load of excavator

Abstract

The invention discloses a system for automatically identifying load of an excavator, which comprises five pressure sensors, five analog signal processing circuits, a control chip and a D / A module. The five pressure sensors are connected to the control chip through the analog signal processing circuits respectively; the control chip is connected with the D / A module; a first pressure sensor is connected to an outlet oil line of a first main pump; a second pressure sensor is connected to an outlet oil line of a second main pump; the third pressure sensor is connected to an oil line on which a bucket cylinder large cavity is connected with a first main valve; a fourth pressure sensor is connected to an oil line on which a movable arm cylinder small cavity is connected with a second main valve; and a fifth pressure sensor is connected to an oil line on which a bucket arm cylinder large cavity is connected with a third main valve. The system can be used for engineering machinery such as theexcavator and the like, determines output power of a motor by automatically identifying the excavation load, is convenient to assemble, can improve operation efficiency of operation, reduces fuel oilconsumption and reduces the working intensity of operators.

Description

technical field [0001] The invention relates to a construction machine, in particular to an excavator load autonomous identification system. Background technique [0002] During the working process of the excavator, due to the great difference in the type of operation objects, the energy required by the excavator to overcome the load is obviously different. It is not accurate enough to rely solely on the subjective judgment of the operator on the work object. For example, when excavating loose soil, the output power of the excavator required by different degrees of soft soil is also different. Therefore, manually adjusting the power mode of the excavator and the throttle position of the engine is very blind, and it is impossible to achieve the energy-saving goal of power matching in the true sense. [0003] If the current excavation situation can be automatically judged during the excavation process, and the engine output power can be adjusted to adapt to the current site l...

AI Technical Summary

Problems solved by technology

Or because the excavation range is too large, the oil cylinder will be blocked, and the outlet pressure will also increase sharply.

[0006] (2) Due to improper operation by the operator, it will also cause errors in the analysis of the outlet pressure of the first main pump 7 and the second main pump 8

For example, the operator did not excavate within several working cycles, resulting in the outlet pressure of the pump being too small, which cannot reflect the power required for actual excavation

[0007] In short, in the current construction machinery load identification system, there is an inability to accurately determine the excavation status, resulting in inaccurate load identification, resulting in a large amount of fuel loss and environmental pollution

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