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Research On Orbital Displacement Monitoring Device Based On Two-dimensional Code And Laser Ranging

Posted on:2020-06-08Degree:MasterType:Thesis
Country:ChinaCandidate:H G HeFull Text:PDF
GTID:2392330599975640Subject:Computer technology
Abstract/Summary:PDF Full Text Request
At present,the rapid development of railways and the high-speed railways of China go to the world.With the continuous increase of railway mileage,the pressure of railway maintenance is also increasing.For rail transportation,if the orbit exceeds the displacement of the design.The damage process of the rails reduces the service life,breaks the rails,and may even cause serious faults such as derailment.It leads to huge economic losses and endangers the safety of railway traffic.Traditional orbital measurement and detection uses periodic manual detection methods to lack intelligent detection means to complete the detection of track displacement,which is inefficient,high in cost and complicated in the working procedures of the operators.The existing displacement detecting device of the track detecting vehicle has problems such as large identification section and low accuracy of positioning problem track.Therefore,it is of great significance to study the automatic monitoring system of orbit displacement monitoring.Based on the actual project research,this paper analyzes the way of orbital displacement in high-speed railway,and proposes a detection method based on two-dimensional code and laser ranging,and expounds the overall scheme and implementation of the orbit displacement monitoring system.The orbital displacement monitoring system is based on the embedded hardware system.It is based on the image processing method in the fast positioning identification of the twodimensional code,including image acquisition,image processing,data access,device-side embedded software design,PC software design.The host computer communicates with the device.According to the system design scheme,the camera collects images and determines whether there is a two-dimensional code image,combined with the image depth value obtained by laser ranging,locates the relative position of the two-dimensional code image and the current camera,and completes decoding on the device end by using the Qzxing library,and finally Calculate the value of the center point of the QR code and upload it to the host computer through the RS232 serial port.The host computer displays the current measurement point value in real time and stores it in the database,and alarms in real time when an offset occurs.The work of the thesis includes the overall design of the system,the detection principle and image processing algorithm analysis,the device end implementation and the upper computer implementation.A contour detection method for realizing fast recognition of twodimensional codes on a lower computer.The image processing algorithm includes twodimensional code fast recognition detection.The database design includes the construction of the Mysqlite database,and the design data table stores the required data.The device-side implementation includes the selection of the hardware to be used,the porting of the driver,and the embedded software of the device-side is written by QT.The upper computer implements the upper computer application program using the QT platform for the real-time status of the track and the history query.This thesis studies and implements a monitoring system that uses two-dimensional code as the information carrier and combines the orbital displacement of laser ranging.It realizes the measurement and early warning of the orbit state,realizes the data preservation,and is important for the track monitoring measurement.
Keywords/Search Tags:Track monitoring, Fast positioning of two-dimensional code, Automatic Monitoring, Image Pocessing, Embedded System
PDF Full Text Request
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