Device and method for detecting load of mining dump truck for strip mine

Abstract

The invention discloses a device and a method for detecting a load of a mining dump truck for a strip mine. The device comprises an oil pressure sensor, a pin axle weighing sensor, a tilt sensor, an ultrasonic wave proximity switch and an industrial personal computer, wherein the oil pressure sensor is arranged on a cylinder jacket of a lifting hydraulic cylinder, the tilt sensor is arranged on the bottom plane of a carriage, the pin axle weighing sensor is arranged at a hinged position between the tail portion of the carriage and a rear axle, the ultrasonic wave proximity switch is arranged below an edge of the tail portion of the carriage. According to the device of the invention, a mode of combining the pin axle weighing sensor with the oil pressure sensor is adopted to directly detectthe load of the carriage, and a horizontal component compensation coefficient and a vertical component compensation coefficient are adopted to weaken an orthogonal effect of pin axle sensor stress detection, so as to obtain the load of the mining dump truck, thus the device has the advantages of novel structure, reliability and practicability, and good economy.

Description

technical field [0001] The invention relates to the field of truck transportation in open-pit mines, in particular to a load detection device and method for dump trucks used in open-pit mines. Background technique [0002] Mining dump trucks are the main equipment for vehicle transportation in large-scale open-pit mining areas at home and abroad, and are responsible for the important task of transporting ore and rock and soil. Mining dump trucks are mainly composed of the front, frame, compartment, wheels and attached power, braking, shock absorbing and buffering devices, etc. It has the characteristics of heavy weight, heavy load, and large volume, and is responsible for transporting ore and rock and soil. important task. [0003] Load is the core parameter to measure the efficiency of mining dump trucks, the main basis for enterprises to formulate reasonable mining and dumping tasks, and an important indicator for evaluating driver performance. At present, there are main...

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Problems solved by technology

[0004] However, the existing research still has the following problems: first, using a weighing scale to weigh, it is necessary to add pressure sensors to the suspension cylinders or shock absorbing springs of multiple pairs of wheels, which is costly and relies on the suspension cylinders and shock absorbing springs The pressure test reflects the pressure on the wheels, ignoring factors such as the hinge between the frame member and the wheels, and is sensitive to changes in the position of the center of gravity of the load, resulting in large weighing errors; The location of weighing is often changed, and the structural characteristics of the weighbridge determine that it cannot be frequently changed, resulting in poor economy and flexibility in the form of weighbridge weighing; third, the complexity of the geological structure of the open-pit mine determines that The density of the ore is not stable during the mining process. The laser radar scan only obtains the volume of the ore, and the estimation error of the load is large; fourth, the load status of the mining truck is indirectly fed back by parameters such as vibration acceleration, which is only a qualitative analysis of the mining truck. load status, rather than quantitative analysis

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