ANALYZER, ANALYZER DISPLAY METHOD AND DISPLAY PROGRAM

To provide an analyzer and a display method and display program of the analyzer for producing display in such a way that correspondence between a signal component and a harmonics component is clarified.SOLUTION: The analyzer comprises: an FFT unit for performing FFT on observed data multiple times a...

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Bibliographic Details
Main Author TAKASHIMA SHOICHI
Format Patent
LanguageEnglish
Japanese
Published 14.03.2019
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Summary:To provide an analyzer and a display method and display program of the analyzer for producing display in such a way that correspondence between a signal component and a harmonics component is clarified.SOLUTION: The analyzer comprises: an FFT unit for performing FFT on observed data multiple times and computing periodically modulated coherence; a partial band addition unit for dividing the acoustic frequency direction of periodically modulated coherence into a plurality of acoustic frequency groups, adding the bands of periodically modulated coherence in the acoustic frequency for each band of the acoustic frequency groups, and computing band-added output in the acoustic frequency direction; a maximum value detection unit for detecting, for each periodic frequency of band-added output, a maximum value in the acoustic frequency direction and the index of a divided acoustic frequency group; a coloration processing unit for determining coloration when displaying the signal component and harmonics component obtained from the band-added output on the basis of the maximum value and the index; and a display generation unit for generating the history display of signal components and harmonics components.SELECTED DRAWING: Figure 5 【課題】信号成分と高調波成分との対応関係が明確となるように表示する分析装置、分析装置の表示方法および表示プログラムを提供する。【解決手段】観測データに対してFFTを複数回行い、周期変調コヒーレンスを演算するFFT部と、周期変調コヒーレンスの音響周波数方向を複数の音響周波数グループに分割し、音響周波数グループの帯域毎に周期変調コヒーレンスを音響周波数方向に帯域加算し、音響周波数方向の帯域加算出力を演算する部分帯域加算部と、帯域加算出力の周期周波数毎に、音響周波数方向の最大値と、分割した音響周波数グループのインデックスとを検出する最大値検出部と、最大値およびインデックスに基づき、帯域加算出力から得られる信号成分および高調波成分を表示する際の配色を決定する配色処理部と、決定された配色で、信号成分および高調波成分の履歴表示を生成する表示生成部とを備える。【選択図】図5
Bibliography:Application Number: JP20170163158