Study On Fixed-hook Detection System Based On Color Cluster In Natural Environment

Daqin railway line, whose transport capacity is directly related to the nationalresource supply, is the main coal exports and "south north coal transport" resources supplyroute. The Qinhuangdao Co. LTD use the dumper system to unload over the C80Bcarriage,but it often appears the fixed-hook phenomenon(the connection on both ends of thecarriages are fixed-hooks) in the process of the dumper turning. It will bring the enterprisehuge economic loss and seriously reduce the transportation ability of Daqin railway line.The paper introduced the design of the automatic fixed-hook detected equipment,which is on the basis of the relationship between carriage body color and fixed-hook usingimage processing. This equipment interactively communicates with the dumper andcontrols the upper computer for triggering the camera to acquire field picture. It will giveresponse depended on its detected result. It is automatic operation during the wholeProcedures, without any manual intervene at all.Put forward a kind of fixed-hook detection algorithm, which is combinedFCM(Fuzzy C-Mean) algorithm with NBS(National Bureau of Standards) color distance.It can avoid for large, complex data processing, that choosing a clustering center as thearea of a single color characteristics after FCM fuzzy clustering algorithm successfullyclasses specific regional color. But combined with the characteristics of the train car colorchange, it can’t simply judges whether the connection is fixed-hook or not through thecolor characteristics from FCM algorithm directly. So take the comparative way, bycalculating NBS color distance between foreground region color characteristics andbackground region color characteristics. From this, the color difference is converted intospecific value and the fixed-hook can be judged by the distance value.Design the fixed-hook detection operating software under Visual C++ platform, andachieve controlling the camera real-time for taking photos and adjusting its parametersaccording to the change external environment, et al. Using Visual C++ and MATLABmixing programming technology, translate the algorithm implemented under MATLABplatform into Visual C++ platform. Communicate with the dunper system in OPC (OLE for Process Control) mode, et al.Site test the equipment at CD8 in ninth branch of Qinhuangdao Port CO. LTD forthree months. 19538 carriage pictures were detected, 784 of all were mistakenly identifiedrotary hook as fixed-hook, and without a mistake identified fixed-hook as rotary hook.Proof that the fixed-hook detection equipment can accurately extract color characteristics,and has high resistance ability to the color noise and pollution noise. Most carriages canbe accurately identified. What’s more, this equipment can fulfill real-time demand.