Title:
WAVEFORM RECORDING APPARATUS
Document Type and Number:
Japanese Patent JP2016050830
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To allow retrieval of abnormalities in waveforms by comparing measured waveforms with one another, without previously setting retrieval conditions including a retrieval zone and a retrieval formula.SOLUTION: The waveform recording apparatus includes: an input unit 2 A/D-converting a measured analog signal and fetching the signal as digital measurement data; a storage unit 5; a display unit 6 displaying measurement waveforms obtained with the measurement data; a control unit 4 processing the measurement data in a predetermined manner; and an operational unit 3. The control unit 4 divides the measured waveforms into a plurality of waveform data groups (waveform files) in order of time series at fixed specific cycles designated by the operational unit 3, creates a histogram from the A/D conversion value of the measurement data for each waveform data group, and stores the histogram into the storage unit 5. Further, the control unit 4 compares the histogram of an original waveform with the histogram of another waveform data group to determine the similarity therebetween if the waveform data group of the original waveform as a reference is selected by the operational unit 3 at waveform retrieval, and performs predetermined waveform retrieval (abnormal waveform retrieval, for example) based on the similarity.SELECTED DRAWING: Figure 1
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Inventors:
TOZAKI AI
Application Number:
JP2014175694A
Publication Date:
April 11, 2016
Filing Date:
August 29, 2014
Export Citation:
Assignee:
HIOKI ELECTRIC WORKS
International Classes:
G01R13/20; G01D9/00
Domestic Patent References:
| JP2009058469A | 2009-03-19 | |||
| JP2001318110A | 2001-11-16 | |||
| JP2013140135A | 2013-07-18 | |||
| JP2006133884A | 2006-05-25 | |||
| JPH07190869A | 1995-07-28 |
Foreign References:
| US5793642A | 1998-08-11 |
Attorney, Agent or Firm:
Takuya Ohara
Noriko Kubo
Noriko Kubo
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