On-Line System Of Monitoring Locomitive Tyre Loose

Tyre loose results in serious security accidents of locomotive digression, so it is significant to monitor the condition of tyre loose for safe driving on railway. Nowadays, in our country the methods of tyre loose detection are all direct ways in which there are disadvantages of applied limitation and more error. This paper mainly introduces an automatic measurement of tyre loose in-track —'On-line System of Monitoring Locomotive Tyre loose' ('System' for short).The basic techniques used in 'System' are infrared radiation measurement and Hall sensor measurement.Firstly, a scheme of measuring tyre loose is presented after a deep study of various detection techniques and various causes for tyre loose.Secondly, the dissertation studies the principle of Hall sensor, the physical process of loose, the sensor's output and the method of processing data. The principle of infrared radiation and factors of influencing measuring temperature were analyzed, and the measures to solve problem were given. Hall sensor and infrared sensor were chosen rationally. The electrical system was designed by microcontroller technology and the software was designed by assembly language. The error sources were analyzed and the error was corrected within the program. The system can collect and process the data, also can make alarm. In the meantime it can save loose data into other memorizer and analyze accident reasons.At last, the correct method of installing 'System' was given after a study. The simulation experiment on Hall sensor was made and measuring data were analyzed in detail. The results of the experiment show that measurement precision of 0.5 mm was got and system's demand was met.