Design And Implementation Of Infrared Bearing Temperature Detection System Based On CPCI Bus

Rail transport has been in the national economic development plays animportant role, has been highly valued by all countries, especially in freighttransport is the main artery of economic construction and development, with therapid development of rail transport in recent years, the safety of vehicle operationon the increasingly important; The project is based on the safety regulations of theMinistry of Railways to complete the design of safe operation of the vehicledynamic testing system to provide infrared thermal axis running their vehicles, hotwheels real-time monitoring of comprehensive testing platform; achieve thermalaxis of the vehicle, hot wheels dynamically detect forecast and achieve highdynamic temperature measurement accuracy and forecasting accuracy.In this article the actual demand for a detailed analysis, and identified issuesthat need to focus on resolving the problem. Using the modular system architecturedesign, Include: basic vehicle information collection module, the temperaturecalculation module, waveform recognition modules, communication modules; onkey issues to focus on a solution; to achieve a three-stage DC amplifier, andcompensation Act to improve the use of hierarchical dynamic velocitycharacteristics of the design of high-precision infrared sensor; Using thecharacteristics of CPCI bus hot swappable, design and implementation of the ADhigh-speed data acquisition crate card; in amplitude calculation, according to probeboth the static characteristic curve, calculated using two-dimensional interpolationprobe dynamic real-time characteristic curve, and using Lagrange interpolationmethod to calculate the dynamic real-time curve corresponding voltage valuecorresponding temperature; In the waveform pattern recognition, algorithms andarea using the integral domain wheel sensor voltage waveform recognition; andintroduced the use of element temperature to determine the dynamic curve andreduce system component calculation error algorithm.Both the Windows operating system platform, using the TCP/IP protocol stackto establish the basis for a safe and reliable data transfer mode, provides thecommunication process and key data packet structure, the software using thenetwork of Socket overlapped I/O mode programming, network communicationprocess to ensure timeliness and reliability.