Apparatus and method used for excavator hanging object weighing

Abstract

The invention discloses an apparatus and a method used for excavator hanging object weighing. The apparatus comprises an oil pressure sensor, angle sensors and a programmable controller; the oil pressure sensor is arranged on a movable arm cylinder; the angle sensors are arranged on a movable arm and a bucket respectively; the oil pressure sensor and the angle sensors are connected with the programmable controller respectively. The method comprises following steps: an excavator unloading torque equation is established; a plurality of different movable arm angles and bucket rod angels are input so as to obtain an equation set, and actual unloading torque values under different lazy arm conditions are obtained by calculation of the equation set; actual torque values of the movable arm cylinder is calculated; and the weight of hanging objects is calculated according to the actual torque values and the actual unloading torque values obtained in the steps above, and working radius of the hanging objects measured by the angle sensor. The apparatus and the method are capable of realizing the weight calculation of the excavator hanging objects rapidly and accurately when parameters such as the weights of the excavator movable arm, the bucket rod and the bucket, and the barycentric coordinate are unknown.

Description

technical field [0001] The invention relates to a weighing device and method for hanging objects of an excavator, in particular to a weighing device and method for hanging objects of an excavator. Background technique [0002] As the head of construction machinery, excavators are widely used, and are often used for hoisting and lifting operations. With the improvement of people's awareness of safe operations and the continuous improvement of relevant national laws and regulations, more and more excavators need to be installed with safety protection devices. , and the old excavators that have been put into use also need to be equipped with safety protection devices. Some countries even require the safety protection device to have a weighing function, that is, it can calculate the weight of the hoisted object. [0003] In order to calculate the weight of the heavy object lifted by the excavator in the lifting operation condition, the manufacturer usually collects two kinds of ...

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Problems solved by technology

[0015] 2. The weight and center of gravity calculated by the main engine factory through three-dimensional modeling is relatively simple, but there is a deviation between the theoretical data and the actual calculation. Due to the huge workload, the main engine factory will not actually measure each component

[0016] To sum up, it is very difficult to carry out on-site actual measurement without these parameters (weight of excavator arm, arm, bucket, etc., coordinates of center of gravity, etc.). Measurement conditions, and the measurement is time-consuming, labor-intensive, and uneconomical

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