Dynamic Measurement And Sorting System Of Logistics Packages

In recent years,with an explosively increase in online shopping,the logistics and express delivery companies have developed rapidly.The delivery efficiency and quality of packages shipments have improved greatly because informatization,automation,and even intelligent new technologies are emerging and applied to the process of logistics and transportation.On the other hand,in an ultra-large-scale manufacturing company,it is still necessary to efficiently deliver various raw materials,semi-finished products,and finished products between manufacturing plants and warehouses in the factory.In either case,one of the key issues to be solved in the process of material delivery is that the material coming from one inlet should be delivered to which outlet,which is essentially a matter of measuring and sorting according to a certain characteristics of the material.In order to improve the delivery efficiency,it is hoped that the information acquiring and sorting of materials are accomplished during movement,rather than in the stationary state.For this reason,this subject carried out a research of real-time detection and identification of bar code,weight and volume of logistics packages in the delivery process.Firstly,based on the analysis of the overall requirements and the design goals of dynamic measurement and sorting system for logistics packages,the design scheme was determined and the overall mechanical structure design was completed.Then,the structural designs and selections of each major module were completed,and the 3D models were established,including parcel delivery device,weighing device,scanning device and volume detection device.Secondly,the electrical design of dynamic measurement and sorting system for logistics packages were completed.Considering that data processing requires a large amount of computing resources,the system was controlled by industrial computer,packages delivery and sort were controlled by motion control card.Thirdly,analyzed the collected weight data was analyzed in the time domain and frequency domain respectively to determine the main sources of error and influencing factors.The high-frequency interference in the signal could be eliminated by a low-pass filter.A compensation algorithm was proposed and the feasibility of the algorithm was verified for the low-frequency interference in this paper.Then,a measurement method of material volume which needs not a special posture of parcels was proposed.Two measuring light screens were used to circularly measure the cross section of the material.The length,width and height of the parcels were calculated by linear fitting the edge of parcels combined with the delivery speed of the material.Hence the volume of material is further calculated.In addition,the software of dynamic measurement and sorting system of logistics packages was designed.According to the functions of the system,the software was divided into main module,motion control module,weighing module,decoding module,volume measurement module,data interface module,calibration module and parameters configuration module.The software framework whose sub-modules were called by the main module was determined,and the working principle and implementation method of each module were elaborated.Finally,the relative performances of dynamic measurement and sorting system of logistics packages,especially the influences of different material delivery speed on volume accuracy and weight accuracy,were tested.The efficiency and accuracy were taken into account as far as possible.The experimental results showed that the dynamic measurement and sorting system of the logistics packages was in line with the expected target.