便携式周期信号分析仪的研制

Development of Portable Periodic Signal Processor

便携式周期信号分析仪由８０９８单片机和ＤＭＦ５００２点阵式液晶平面显示器组成。可以同时显示信号的波形图、频谱图和数据，通过键盘可控制图形的放大、缩小、左移、右移，可以对屏幕进行拷贝。该仪器可用于在现场对机械设备进行故障诊断。文中介绍了其点阵液晶屏幕显示的一般方法、数字滤波的应用、ＦＦＴ的误差分析、减小误差的途径以及实际应用举例。

A portable periodic signal processor consists of 8098 chip microprocessors and DMF5002 lattice liquid crystal plane display. It can display the waveform, frequency spectrum and data of the signal simultaneously. The amplifying of figure, and its reducing and moving are controled by keyboard. The screen can be copied. The processor can be applied to diagnose machine failures. This paper introduced the method for lattice liquid crystal screen display, the applying of numeral wave filtration, the error analyzing, the strategy of reducing error,as well as some applicatiom examples.