| 摘要 |
In a system for monitoring the condition of a machine by vibration analysis, including at least one vibration sensor in operative contact with the machine for sensing machine vibrations, and for providing a vibration signal at its output, a sampling device connected to the output of the vibration sensor for sampling, amplifying and digitizing the signal obtained from the vibration sensor, a frequency analyzer arranged to receive the sampled and digitized signal from the sampling device, and a pattern recognizer coupled to the frequency analyzer for detection of any abnormal frequency spectra, the improvement includes a data processing unit adapted to store control programs, which in turn is connected to the vibration sensor, and includes a microcomputer inclusive of a random access memory, for obtaining vibration data from the sensor, and for storing the vibration data in the form of a time series in the memory, a central monitor remote from the data processing unit adapted to store another program therein, including a computer connected to the frequency analyzer, and providing for monitoring and further processing of the time series, a control unit connected to the monitor, and a communication link connecting the data processing unit and the monitor for periodic transmission of the time series from the memory in the microcomputer to the frequency analyzer, and for transferring the other program from the monitor back to the data processing unit, the control unit also providing for control of the sampling device. |
