通过涡轮增压器振动频谱分析获取其转速的研究

Research on Measurement of Rotational Speed of Turbocharger through FFT

以 8 0C196为核心的手持式FFT分析仪 ,对复数范围内 10 2 4点进行浮点快速傅里叶变换 ,从而得到被测信号的频谱图 ,通过分析处理频谱图的特征 ,诊断出被测对象的工作状态。同时 ,将其进行微型化设计 ,并应用于对机车涡轮增压转速的间接测量 ,无需拆装外壳 ,取得了良好的效果。

A hand hold FFT analyzer,whose core is 80C196KB microprocessor is introduced.By use of floating point fast Fourier transfer of 1 024 points in complex number field,the spectral plot of detected signal can be got.By analyzing and processing the character of spectral plot,we can diagnose the active state of the detected object.At the same time,we microminiaturize the device and apply it to measure the rotational speed of locomotive turbocharger.The speed can be measured conveniently with good effect and no need of departing the shell of the turbocharger.