Research Of Roll Breaing Signal Recognition And Working Monitor System Based On Virtual Instrument

Rolling bearing is the brittle part of a machine, a lot of mechanical failure is relevant to the state of rolling bearing. It is estimated that about 30 percent of mechanical failure is caused by it in the rolling machines with rolling bearing. It is obviously that the quality of rolling bearing has a great impact on the working condition. Therefore, the technology of testing rolling bearing is paid a great attention to in home and abroad and has a great progress in the recent years. The most common method is monitoring the working station of rolling bearing with the analysis of oscillating signals.At present the identification signal of rolling bearing is based on analog monitoring system composed of analog instrument such as FFT analyzer, Amplitude analyzer and so on. The system has the shortcoming as follows: not enough friendly user interface, unitary function, under abundant analytical contents, poor generality, long developing period, high cost and so forth. With the development of computer technology in combination with test technology, virtual instrument has made up the shortage of conventional test instrument. Virtual instrument has taken the lead of the profession of instrument.With the use of advanced virtual instrument technology and reasonable selection of hardware such as sensor, signal adjuster and A/D conversion board, a series of software and softpanel are designed in the paper. Furthermore, the strongly functional programming language LabWindows/CVI is well used. The paper is based on the deep analysis of rolling bearing identification technology which is made up of analog instruments. A suit of rolling bearing identification signal virtual instrument has been found with which some representative failure of GB6309 type of rolling bearing on the omnipotent lab desk in Testing Laboratory have been measured and diagnosed. It has received satisfying effect. The paper has also compared oscillating identification signals of different rolling bearing and put forward some beneficial advices. Thereby the technology of identifying and diagnosing rolling bearing signal has ascend to measuring system based on virtual instrument from conventional analog one.The paper has successfully completed the design task and the result meets the expectation. The designed virtual instrument of rolling bearing has a certain applied value and its function is far superior to the analog measuring system.