Research And Implementation Of Excavator Electric Control System

Hydraulic excavator takes an important role in the development of the national economy for its extensive use in the fields of industry, civil architecture, transportation, hydraulic and electric power project. However, because the energy consumption of the excavator is huge, therefore the energy-saving research of the excavator is very vital significance. Energy-saving is a very important development direction of the world industry. As the main equipment of the earth-rock excavation, the hydraulic excavator can only have an efficiency of 50-70% if no conservation measure is adopted. Along with the entry into WTO, it is essential to improve the level of the electronic energy-saving control system in order to strengthen the competitive ability of the domestic hydraulic excavator and follow the tide of world development.In this paper, the diesel engine, variable pump, valve body and the load are seen as a system, and the notion of system theory is used to exploit the energy saving potential of the hydraulic excavator completely. First, the situation of study on the energy saving of the excavator at home and abroad is represented. Moreover, the main energy loss is analyzed for the whole power transmission chain of the excavator, and the loss caused by the irrationality of decreasing the power matching is regarded as the focus of our works. Some methods are introduced to process effective pressure signals in this paper. To achieve the power matching of the excavator power transmission chain using the signals processed means to achieve the power matching of hydraulic system and load and the power matching between engine and hydraulic pump mainly. Then how to achieve the other related miscellaneous function through processing the pressure signal was proposed.Based on the theoretical analysis, we do some researches on how to realize an excavator control system which has the function of adaptive load. In the system, the S3C2410 is taken to be as the control core and the touch screen is adopted to be as the input device, so it is expedient to control. The design methodology of the control system is researched concretely on the hardware and software respects. The embedded computing solution is employed in this system, which is easy to expand the hardware functional module and realize the upgrades and maintenance of the software. In hardware respect, we represent the realizations of all the sub circuits in module and use the stepping motor to be as the executive component of the throttle actuator. As the result, the system can be controlled accurately and expediently. In software respect, the design method of top-down is adopted. As the foundation of the control software, the establishing method of the development environment including the installation of the development tool and the Linux system transplant is illustrated firstly. After that, the design method of the control software is researched. Finally, the development approach of the graphical interfaces is discussed.This control system is quite good to realize the power matching of the excavator power transmission chain, which can reduce the overheating of the system, improve the reliability of the equipment, cut the fuel consumption, and hit the energy-efficient target.