一引言机械故障检测,以往都是利用机械产品振动的音响特性,凭人的听觉来进行的。由于人耳对音响特性变化的感觉灵敏度很低,不同人和在不同环境下,人耳对音响特性变化的判断差异也很大,所以这种方法无法保证产品检验的标准化和稳定化。对机器的故障予报就更难做到。往往是,当人耳判断出机器振动的音响特性不正常时,机器可能已严重损坏,如何能 An introduction to mechanical fault detection, the past are the use of mechanical products vibration of the acoustic properties, with people’s hearing carried out. Due to the low sensory sensitivity of the human ear to the change of the acoustic characteristics, there is also a great difference between human ears and the human ear in judging the change of the acoustic characteristics under different environments. Therefore, this method can not guarantee the standardization and stabilization of the product test. It is harder to report machine faults. Often, when the human ear judges that the sound characteristics of the machine vibration are not normal, the machine may have been severely damaged. How can