Title:
STATE MONITORING DEVICE, STATE MONITORING SYSTEM, AND STATE MONITORING METHOD
Document Type and Number:
WIPO Patent Application WO/2021/070243
Kind Code:
A1
Abstract:
This state monitoring device (4) comprises: an A/D conversion unit (41) that converts a sine wave signal of AE waves inputted from an AE sensor (3) into digital data; a data extraction unit (42) that extracts a maximum value from the digital data; a parameter calculation unit (43) that, by using the digital data, calculates values of a parameter indicating a state of the AE waves; a matrix generating unit (44) that generates matrix data including a plurality of regions in which a plurality of ranges for the values of the parameter are correlated with a plurality of ranges for the maximum value, wherein the number of times of occurrence of the maximum value is counted within a region in which the range for the values of the parameter calculated by the parameter calculation unit (43) corresponds to the range of the maximum value extracted by the data extraction unit (42); and an output processing unit (45) that outputs the matrix data generated by the matrix generating unit (44).
Inventors:
SHINOHARA SHINJI (JP)
ISHIGAMI SHINYA (JP)
ISHIGAMI SHINYA (JP)
Application Number:
PCT/JP2019/039631
Publication Date:
April 15, 2021
Filing Date:
October 08, 2019
Export Citation:
Assignee:
MITSUBISHI ELECTRIC ENG (JP)
International Classes:
G01N29/14; G01M99/00
Domestic Patent References:
| WO2018193617A1 | 2018-10-25 | |||
| WO2009096551A1 | 2009-08-06 |
Foreign References:
| JP2006226731A | 2006-08-31 | |||
| JPH07134060A | 1995-05-23 | |||
| US20190033263A1 | 2019-01-31 |
Attorney, Agent or Firm:
TAZAWA, Hideaki et al. (JP)
Download PDF: