報告書番号

Y92014

タイトル（和文）

地形図上の配電ネットワーク図面の自動認識

タイトル（英文）

AUTOMATIC RECOGNITION OF DISTRIBUTION NETWORK DRAWINGS SUPERIMPOSED ON STREET MAS

概要 （図表や脚注は「報告書全文」に掲載しております）

配電設備の管理業務において，設備の配置情報は図面に依存しているため，設備管理情報と運動せず，業務効率化の隘路になっている。このため，図面情報をコンピュータへ効率的に入力する方法が求められている。そこで，人工知能を応用した自動認識技術や検索技術を活用し，手描き配電設備図面から，設備シンボルや背景の道路境界線を効率的にコンピュータに入力する手法を開発した。これにより，図面一枚の入力に要する時間を，これまでの数時間から数分程度のレベルまで大幅に短縮できる見通しを得た。本研究成果を利用すれば，電力会社が保有する膨大な量の手描き配電設備図面をほとんど人手をかけずに効率的にコンピュータ化できるようになる。

概要 （英文）

ELECTRIC UTILITIES HAVE LONG USED MAPS DESCRIBING POWER DISTRIBUTION FACILITIES SUCH AS ELECTRIC POLES,LINES,AND OTHER ATTACHMENTS ON STREET MAPS. THEY ARE INDISPENSABLE DOCUMENTS FOR DAILY MAINTENANCE WORK. RECENTLY,THE NECESSITY FOR IMPROVING EFFICIENCY AND RELIABILITY OF MAINTENANCE HAS BEEN STRESSED,AND COMPUTERIZATION OF THESE MAPS IS REQUIRED. TO THIS END,SEVERAL APPROACHES ARE USED SUCH ASSTORAGE OF MAPS AS LASERDISC FILES FOR QUICK RETRIEVAL,AND REDRAWING OF EXISTING MAPS USING CAD. HOWEVER,DUE TO THE NUMBER OF MAPS (SEVERAL HUNDREDS OF THOUSANDS FOR EACH COMPANY) AND FOR EFFECTIVE USE OF THE INFORMATION,THESE APPROACHES ARE NOT SATISFACTORY. THIS REPORT PROPOSES ANENTIRELY NEW APPROACH FOR READING MAPS BY COMPUTER EFFICIENTLY AND ACCURATELY. IT USES THE FACT THAT JAPANESE UTILITIES STORE IN FORMATION OTHER THAN GEOGRAPHICAL DATA ON EACH POWER DISTRIBUTION FACILITY IN A COMPUTER FILE,USUALLY CALLED FACILITY DATABASE. THE METHOD PROPOSED IN THIS PAPER DEVELOPS A LINE DRAWING FROM A GRAPHIC IMAGE USING AN OPTICALSCANNER. THEN IT IDENTIFIES EACH FACILITY SYMBOL BY CONSULTING THE FACILITY DATABASE. THE MATCHING BETWEEN SYMBOLS AND DATABASE IS PERFORMED BY AI TECHNIQUES SO ANY CONTRADICTIONS ARE COMPLETELY RESOLVED. ONLY WHEN CONTRADICTION IS LEFT UNSOLVED DUE TO AN INCONSISTENCY BETWEEN THE MAP CONTENT AND THE DATABASE,IS AN OPERATOR ASKED FOR A MANUAL CHECK.

報告者

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