Patent ID: 8838324

Claim:
A device for monitoring and diagnosing abnormality of a working machine in which the monitoring and diagnosing device receives and inputs in time sequence operational data of the working machine detected by a plurality of sensors and performs abnormality diagnosis on the working machine using the received operational data, the monitoring and diagnosing device comprising: a processor; a memory coupled to said processor storing: a classification information storage section in which reference classification information is stored; frequency information storage section in which reference frequency information is stored; a first data classifier section which reads out the reference classification information from the classification information storage section, compares the operational data, which were detected by the plurality of sensors and inputted in time sequence, with the reference classification information to thereby classify the operational data, and then generates operational data classification information; a frequency comparator section which compiles the operational data classification information, generates operational data frequency information by adding, to the operational data classification information, appearance frequency information for each of the classifications of the operational data, reads out the reference frequency information from the frequency information storage section, and then generates operational data frequency comparison information by comparing the operational data frequency information with the reference frequency information; and an abnormality diagnosing section which performs dual abnormality diagnosis upon the working machine including a first abnormality diagnosis by use of the operational data classification information and a second abnormality diagnosis by use of the operational data frequency comparison information; and a display unit which displays at least one of the operational data frequency comparison information generated by the frequency comparator section and diagnostic result data from the abnormality diagnosing section.