DIAGNOSIS DEVICE, DIAGNOSIS SYSTEM, AND PROGRAM

PROBLEM TO BE SOLVED: To extract information about a signal component frequency and cycle of an abnormal noise from waveforms of frequency analysis results representing time change of intensity distribution for each of the frequencies obtained by subjecting a voice signal to frequency analysis.SOLUT...

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Bibliographic Details
Main Authors MITSUHASHI TOMOYUKI, UDAKA TSUTOMU
Format Patent
LanguageEnglish
Japanese
Published 22.06.2017
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Summary:PROBLEM TO BE SOLVED: To extract information about a signal component frequency and cycle of an abnormal noise from waveforms of frequency analysis results representing time change of intensity distribution for each of the frequencies obtained by subjecting a voice signal to frequency analysis.SOLUTION: A voice acquiring unit 31 acquires a voice signal by inputting voice of the abnormal noise generated in an image forming device 20. A frequency analyzing unit 32 generates frequency spectrum waveform data by subjecting the acquired voice signal to STFT (short time Fourier transformation). A control unit 33 displays the frequency spectrum waveform on a touch panel, and accepts specification of a region including a signal component of the abnormal noise in the displayed frequency spectrum waveform on the basis of touch operation by a user. The frequency analyzing unit 32 performs fast Fourier transformation for the frequency component included in the specified region in a time axis direction. The control unit 33 extracts information about the cycle and frequency of the abnormal noise from the analysis results of fast Fourier transformation in the frequency analyzing unit 32.SELECTED DRAWING: Figure 3 【課題】音声信号を周波数解析することにより得られた周波数毎の強度分布の時間変化を表した周波数解析結果の波形から、異音の信号成分の周波数および周期の情報を抽出する。【解決手段】音声取得部31は、画像形成装置20において発生した異音の音声を入力して音声信号を取得する。周波数解析部32は、取得された音声信号のSTFT(短時間フーリエ変換)を行って、周波数スペクトル波形データを生成する。制御部33は、この周波数スペクトル波形をタッチパネル上に表示し、ユーザのタッチ操作に基づいて、表示された周波数スペクトル波形における異音の信号成分が含まれる領域の指定を受付ける。周波数解析部32は、指示された領域に含まれる周波数成分に対して時間軸方向に高速フーリエ変換を行う。制御部33は、周波数解析部32における高速フーリエ変換の解析結果から異音の周期および周波数の情報を抽出する。【選択図】図3
Bibliography:Application Number: JP20150243112