A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
METHOD FOR DIAGNOSING DETERIORATION OF ROAD BRIDGE JOINT MEMBER
PROBLEM TO BE SOLVED: To provide a method for easily and reliably determining a deterioration degree of a road bridge joint member.SOLUTION: A method for diagnosing deterioration of a road bridge joint member is provided that comprises: setting a sound/video image sampling unit on a shoulder of an expressway and sampling sound pressure waveform data of generated sound of a road bridge joint member and video image data thereof; calculating a reference peak value Pand a high-range peak value Pfrom a frequency spectrum obtained by performing Fourier analysis of the sound pressure waveform data to acquire a peak ratio R=(P/P); determining a deterioration degree of the road bridge joint member from the peak ratio R; estimating a sound source direction (θ, φ) of the generated sound using the sound pressure waveform data; and creating a deterioration diagnosis video image G in which the sound source direction (θ, φ) and a graphic representing the deterioration degree are displayed.SELECTED DRAWING: Figure 9
【課題】道路橋用ジョイント部材の劣化の度合いを容易にかつ確実に判定する方法を提供する。【解決手段】高速道路の路肩に音・映像採取ユニットをセットして道路橋用ジョイント部材の発生音の音圧波形データと画像データとを採取した後、音圧波形データをフーリエ解析して得られた周波数スペクトルから、基準ピーク値ＰLと高域ピーク値ＰHを算出して、ピーク比Ｒ＝（ＰH/ＰL）を求め、このピーク比Ｒから道路橋用ジョイント部材の劣化の度合いを判定するとともに、音圧波形データを用いて、発生音の音源方向（θp，φp）を推定し、音源方向（θp，φp）と劣化の度合いと表す図形とが表示された劣化診断用画像Ｇを作成するようにした。【選択図】図９
METHOD FOR DIAGNOSING DETERIORATION OF ROAD BRIDGE JOINT MEMBER
PROBLEM TO BE SOLVED: To provide a method for easily and reliably determining a deterioration degree of a road bridge joint member.SOLUTION: A method for diagnosing deterioration of a road bridge joint member is provided that comprises: setting a sound/video image sampling unit on a shoulder of an expressway and sampling sound pressure waveform data of generated sound of a road bridge joint member and video image data thereof; calculating a reference peak value Pand a high-range peak value Pfrom a frequency spectrum obtained by performing Fourier analysis of the sound pressure waveform data to acquire a peak ratio R=(P/P); determining a deterioration degree of the road bridge joint member from the peak ratio R; estimating a sound source direction (θ, φ) of the generated sound using the sound pressure waveform data; and creating a deterioration diagnosis video image G in which the sound source direction (θ, φ) and a graphic representing the deterioration degree are displayed.SELECTED DRAWING: Figure 9
【課題】道路橋用ジョイント部材の劣化の度合いを容易にかつ確実に判定する方法を提供する。【解決手段】高速道路の路肩に音・映像採取ユニットをセットして道路橋用ジョイント部材の発生音の音圧波形データと画像データとを採取した後、音圧波形データをフーリエ解析して得られた周波数スペクトルから、基準ピーク値ＰLと高域ピーク値ＰHを算出して、ピーク比Ｒ＝（ＰH/ＰL）を求め、このピーク比Ｒから道路橋用ジョイント部材の劣化の度合いを判定するとともに、音圧波形データを用いて、発生音の音源方向（θp，φp）を推定し、音源方向（θp，φp）と劣化の度合いと表す図形とが表示された劣化診断用画像Ｇを作成するようにした。【選択図】図９
METHOD FOR DIAGNOSING DETERIORATION OF ROAD BRIDGE JOINT MEMBER
道路橋用ジョイント部材の劣化診断方法
TATEISHI KAZUO (author) / OWAKI MASANAO (author) / ZAIMA TAKEFUMI (author)
2016-11-10
Patent
Electronic Resource
Japanese
IPC:
G01N
Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften
,
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
/
E01C
Bau von Straßen, Sportplätzen oder dgl., Decken dafür
,
CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE
/
E01D
BRIDGES
,
Brücken
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