Monitoring device, monitoring method, and recording medium

• US 9,494,932 B2
• Filed: 08/21/2013
• Issued: 11/15/2016
• Est. Priority Date: 09/13/2012
• Status: Active Grant

• Current Assignee: Omron Corporation
• Original Assignee: Omron Corporation
• Inventors: Kawai, Wakahiro
• Primary Examiner(s): FILE, ERIN M
• Application Number:
  US14/424,235
• Publication Number:
  US 20150220084A1
• Time in Patent Office: 1,182 Days
• US Class Current: 1/1
• CPC Class Codes: G05B 23/00 Testing or monitoring of control systems or parts thereof monitoring of programme-control systems G05B19/048, G05B19/406
• CPC Class Codes: G05B 23/0235 based on a comparison with predetermined threshold or range, e.g. "classical methods", carried out during normal operation; threshold adaptation or choice; when or how to compare with the threshold
• CPC Class Codes: G05B 23/0272 Presentation of monitored results, e.g. selection of status reports to be displayed; Filtering information to the user
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

A monitoring device includes: a physical quantity acquisition section for acquiring physical quantities indicative of a state of a device; an abnormality determination section for determining, in accordance with whether or not the acquired physical quantities fall within a predetermined range, whether or not there is an abnormality; an abnormal waveform data generation section for, in a case where the abnormality determination section determines that there is an abnormality, generating abnormal waveform data indicative of a change over time in the physical quantities acquired during an abnormal waveform period containing at least a period from a point in time at which the abnormality determination section determines that there is an abnormality to a point in time at which a predetermined accumulation time elapsed; and a reporting section for causing a display section to display an abnormal waveform indicated by the abnormal waveform data.

Claims

1. A monitoring device comprising:

a physical quantity acquisition section for acquiring physical quantities indicative of a state of a monitoring target device;

an abnormality determination section for determining, in accordance with whether or not the physical quantities acquired by the physical quantity acquisition section fall within a predetermined range, whether or not there is an abnormality;

an abnormal waveform data generation section for, in a case where the abnormality determination section determines that there is an abnormality, generating abnormal waveform data indicative of a change over time in the physical quantities acquired during an abnormal waveform period containing at least a period from a point in time at which the abnormality determination section determines that there is an abnormality to a point in time at which a predetermined accumulation time elapsed;

a reporting section for causing a display section to display an abnormal waveform indicated by the abnormal waveform data generated by the abnormal waveform data generation section; and

a normal waveform data management section for managing normal waveform data indicative of a change over time in the physical quantities in a normal state,

the normal waveform data management section generating the normal waveform data by extracting, from the physical quantities acquired by the physical quantity acquisition section, physical quantities for which the abnormality determination section continuously determines for a predetermined time that there is no abnormality, and

the reporting section causing the abnormal waveform and a normal waveform indicated by the normal waveform data to be displayed on a single screen of the display section.

2. The monitoring device as set forth in claim 1, wherein, in a case where a current point in time falls within a predetermined display time period, the reporting section causes the display section to display the abnormal waveform.

3. The monitoring device as set forth in claim 1, wherein the physical quantities are each an electric current value or an amount of electric power consumption.

4. The monitoring device as set forth in claim 1, wherein the abnormality determination section determines, in accordance with whether or not an accumulated value of the physical quantities acquired by the physical quantity acquisition section during a period between a current point in time and a point in time that is a predetermined time before the current point in time falls within the predetermined range, whether or not there is an abnormality.

5. The monitoring device as set forth in claim 1, wherein the abnormality determination section determines, in accordance with whether or not the latest physical quantity acquired by the physical quantity acquisition section falls within the predetermined range, whether or not there is an abnormality.

6. A monitoring method comprising the steps of:

a) acquiring physical quantities indicative of a state of a monitoring target device;

b) determining, in accordance with whether or not the acquired physical quantities fall within a predetermined range, whether or not there is an abnormality;

c) in a case where it is determined that there is an abnormality, generating abnormal waveform data indicative of a change over time in the physical quantities acquired during an abnormal waveform period containing at least a period from a point in time at which it is determined that there is an abnormality to a point in time at which a predetermined accumulation time elapsed;

d) causing a display device to display an abnormal waveform indicated by the abnormal waveform data; and

e) managing normal waveform data indicative of a change over time in the physical quantities in a normal state,

the normal waveform data being generated in the step e) by extracting, from the physical quantities acquired in the step a), physical quantities for which it is continuously determined for a predetermined time in the step b) that there is no abnormality, and

in the step d), the abnormal waveform and a normal waveform indicated by the normal waveform data being displayed on a single screen of the display section.

7. A non-transitory computer-readable recording medium storing a control program for causing a computer to carry out each of the steps of the monitoring method recited in claim 6.