Design Of Linear Array Infrared Hotbox Digital Probe And Research Of The Detection Data Fushion Technology

During the operation of the train, the real-time monitoring and fault alarm for thefunction of bearing is an important task pertaining to the train safety, and temperatureof bearing is an important characterization of its failure. Infrared Hotbox detectionsystem is a safety assurance system, used to detect the temperature of the runningtrain axles with non-contact, forecast the hot shaft failure according to the hotbox andother information. With the development of sensor technology and embeddedtechnology, it is particularly important to design an intelligent infrared Hotboxdetection system with fast response speed and reliable detection information.Contrary to the current single point hotbox detection ideas with poor reliabilityinformation, the detection system slow to respond and the lack of hardware andsoftware technology, proposed a kind of design principles and programs of four pointlinear array infrared hotbox probe，based onthe ARM core embedded controller. Themain contribution and completed work in this dissertation show as follows:Firstly, Analysis and establish the irradiance model of the train axles based onradiation theory, research the design principles of the four-point linear array infrareddetector combine with the optical system. In accordance with the parameters of thetrain and infrared detector technology, gives the parameters request for the trainHotbox Detection dedicated four-point HgCdTe photon detectors.Secondly, according to the non-conformance and the difference of confidencefrom different points, Put forward the adaptive optimal weighting hotbox fusionalgorithm based on the multi-sensor data fusion theory. Gives the recursive method ongetting measurement variance based on observations of the various points, andanalyzes the advantages and optimal estimation demonstration of fusion system.The third, build the hardware framework for the multi-point probe, based onCortex-M3core ARM processor and the four point detectors. Complete the embeddedsoftware development and comply the collection of basic information from the trainand Hotbox data acquisition and processing functions.The fourth, design the message protocol according to the requirements of thehuman-computer interaction. Take into account the probe acquisition synchronizationand communication anti-collision scheme, make the dual probe data upload properlythrough the industrial485full-duplex high-speed communication method.Finally, using a series of auxiliary test platform, laboratory simulation and test,The article verified the feasibility of non-contact multi-point Hotbox detection fromthe running train with the speed of360km/h. Completed the calibration of themulti-ponit hotbox data by the adaptive optimal weighting algorithm. Through the integrated controlling of the embedded software to the hardware system, making theHotbox collection and transmission of digital and networked. Simplified the entiredetection system, and enhance the reliability of information.