Abstract
In chemical industry plant, electric power plant and so on, it is desired to operate under the condition with high safety as well as high efficient from an economical standpoint. For the performance of these conditions, it is required to well inform the present state of equipment of plant. These have been achieved by the machine diagnosis using vibration and/or AE techniques that, at present, have been utilized with respective uses. Each has the characteristic potential to diagnosis for machine conditions. It can be expected to improve the quality of diagnostics by making use of their characteristic features simultaneously.
