Patent ID: 7860663

Claim:
An abnormality diagnosing apparatus used in a machine equipment including at least one rotating or sliding part, the abnormality diagnosing apparatus comprising: at least one detecting portion for outputting a signal generated from the machine equipment as an electric signal; and a signal processing portion for determining presence or absence of an abnormality and an abnormal portion of the part based on a frequency of a shockwave in which a waveform of the electric signal per unit time exceeds a threshold, and a rotational speed signal or a moving speed signal, wherein the signal processing portion subjects the waveform of the electric signal to a filter processing and converts the waveform to an all time rectified waveform, wherein whenever the waveform exceeding the threshold, the signal processing portion makes a waveform which is converted so as to hold the waveform at a value exceeding the threshold for a predetermined period of time according to the rotational speed signal, and wherein the processing portion informs a possibility of bringing about the abnormality in the part according to a number of times in which the waveform exceeds the threshold per a predetermined rotational number.