Dynamic Weighing Of Wheel Loader Based On ARM System Design And Research

In recent years,due to the rapid development of the modern construction industry and the railway industry,the demand for wheel loaders has been increasing,but the traditional wheel loader weighing system is facing away from the weighing site to the place where the loadometer is installed.The inefficiency of weighing weighed on the development of intelligent wheel loaders.In order to better promote the development of wheel loaders,this paper studies a large number of literature on the dynamic weighing of wheel loaders.Through comparative analysis,it is found that although traditional wheel loaders can achieve the purpose of weighing through various methods,However,the weighing process has the disadvantages of low efficiency and long time.Therefore,the dynamic weighing of the wheel loader still needs further research.In this paper,the ARM-based wheel loader dynamic weighing system is studied.The pressure value measured by the pressure sensor indirectly reflects the weight of the weighed material.During the boom lifting process,the Hall sensor is used to set the sampling interval and the Wheel loader dynamic model,real-time measurement of the weight of goods in the hopper,the data displayed on the LCD screen.The wheel loader dynamic weighing system mainly focuses on four aspects:(1)The establishment of a wheel loader dynamics model.By analyzing the mechanical structure of the wheel loader,a simplified dynamic model of the wheel loader is established,which includes a wheel-loading boom lifting model,a boom hydraulic cylinder model,and an angle calculation model within a fixed sampling interval.(2)The study of weighing algorithms.The wavelet packet plus VMD(variable modal decomposition)filtering algorithm of the hydraulic signal collected by the pressure sensor and the non-linear fitting and coefficient correction of the least-squares method of the filtered signal are introduced.(3)The hardware and software design of the weighing system.Starting from the required functions of the weighing system,the hardware has a modular design scheme,including a power supply module,a signal acquisition module,a signal conditioning module,an AD conversion module,and a storage module.Software design includes driver and weighing algorithm programming flow.(4)On-site weighing test.Including analog voltage acquisition experiment,pressure sensor and Hall sensor installation and debugging,different weights weighing test,LCD display test.Through a large number of weighing data analysis,the weighing system is in the progress of the process(speed 5 ~ 10 km / h),weighing accuracy of 1%.