对任何一台机器,如果能及时地发现和诊断出它的故障,对于防止意外事故,保证所生产的产品质量有着现实意义。大家知道,有经验的工人或技术人员可以凭耳朵的听觉或手等直接触觉对振动的感受来判断机器是否有故障甚至判断出故障在哪里。 但是,人们终究希望能找到借助于某种仪器来 For any machine, if it can detect and diagnose its faults in time, it is of practical significance to prevent accidents and ensure the quality of products produced. We all know that an experienced worker or technician can judge whether a machine has a fault or even determine where a fault is due to the sense of vibration caused by the direct sense of hearing of the ear or hand. However, people eventually hope to find help with some kind of instrument