This paper proposes a method to measure the amount of difference in road surface steps caused by an earthquake using LiDAR (Light Detection And Ranging), which measures the distance to an object and the shape of the object based on the information of reflected light from a laser beam. It is not possible to acquire point cloud data for the area shielded by an object. Thus, when a step is viewed from the top to the bottom, the Euclidean distance between two points cannot be obtained because there is an invisible area where the point cloud data of the step cannot be acquired. Therefore, in this study, the amount of step is obtained by approximating the point cloud data of the road surface to the equation of a plane in three-dimensional space, and the accuracy of this method is examined. As a result, we confirmed that by taking into account the invisible area, the amount of the step can be calculated more accurately for the step directly in front of the LiDAR equipment.
"},{"@language":"ja","@value":"本論文は，レーザー光を照射して反射光の情報をもとに対象物までの距離や対象物の形などを計測するLiDAR（Light Detection And Ranging）を用いて，地震発生に伴って生じる路面段差の段差量を取得する手法を提案したものである．LiDARは反射光を利用しているため段差を上から下に俯瞰する場合には，点群データを取得できない不可視領域が存在する．そこで本研究では，下路面の点群データを3次元空間上の平面の方程式へ近似することで不可視領域部分を補い，平面方程式から得られる座標値から段差量を求める手法を提案し，その精度について検討した．その結果，LiDAR設置真正面の段差については，不可視領域を考慮することで，段差量をより正確に算出できることを確認した．
"}],"abstractLicenseFlag":"disallow"}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1410023328278845568","@type":"Researcher","foaf:name":[{"@language":"ja","@value":"梶田 幸秀"},{"@language":"en","@value":"KAJITA Yukihide"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"九州大学大学院 工学研究院 社会基盤部門"}]},{"@id":"https://cir.nii.ac.jp/crid/1410023328278845569","@type":"Researcher","foaf:name":[{"@language":"ja","@value":"黒川 秀哉"},{"@language":"en","@value":"KUROKAWA Hideya"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"九州大学大学院 工学府 土木工学専攻"}]},{"@id":"https://cir.nii.ac.jp/crid/1410023328278845570","@type":"Researcher","foaf:name":[{"@language":"ja","@value":"山﨑 智彦"},{"@language":"en","@value":"YAMASAKI Tomohiko"}],"jpcoar:affiliationName":[{"@language":"ja","@value":"九州大学 工学部技術部"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"24366021"}],"prism:publicationName":[{"@language":"ja","@value":"土木学会論文集"},{"@language":"en","@value":"Japanese Journal of JSCE"},{"@language":"ja","@value":"土木学会論文集"},{"@language":"en","@value":"Japanese Journal of JSCE"}],"dc:publisher":[{"@language":"en","@value":"Japan Society of Civil Engineers"},{"@language":"ja","@value":"公益社団法人 土木学会"}],"prism:publicationDate":"2025","prism:volume":"81","prism:number":"13","prism:startingPage":"n/a"},"reviewed":"false","url":[{"@id":"https://www.jstage.jst.go.jp/article/jscejj/81/13/81_24-13527/_pdf"}],"availableAt":"2025","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=2024%20Noto%20Peninsula%20Earthquake","dc:title":"2024 Noto Peninsula Earthquake"},{"@id":"https://cir.nii.ac.jp/all?q=step","dc:title":"step"},{"@id":"https://cir.nii.ac.jp/all?q=LiDAR","dc:title":"LiDAR"},{"@id":"https://cir.nii.ac.jp/all?q=point%20cloud","dc:title":"point cloud"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360292619284965760","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Random sample consensus"}]},{"@id":"https://cir.nii.ac.jp/crid/1360862718462500736","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A robust statistics approach for plane detection in unorganized point clouds"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282680332537856","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"A STUDY OF THE NEW ROAD SURFACE EVALUATION METHOD USING THREE-DIMENSIONAL COORDINATE DATA"},{"@language":"ja","@value":"三次元点群データを用いた新たな路面評価手法の検討"},{"@value":"A study of the vew road surface evaluation method using three-dimensional coordinate data"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282681472946048","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"2011.4.11に発生した福島県いわき市を震源とする地震による地震被害の3Dレーザースキャナを用いた調査"},{"@language":"en","@value":"Applications of 3D laser scanner to the damage identification by the earthquake of Iwaki-city, Fukushima prefecture in 2011.4.11"},{"@language":"ja-Kana","@value":"2011.4.11 ニ ハッセイ シタ フクシマケン イワキシ オ シンゲン ト スル ジシン ニ ヨル ジシン ヒガイ ノ 3Dレーザースキャナ オ モチイタ チョウサ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390295181711391616","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"EVALUATION OF DEFORMATION OF EARTHQUAKE DAMAGED BUILDING BY 3D LASER SCANNER"},{"@language":"ja","@value":"3次元レーザースキャナによる地震被害建物の変形量評価"}]},{"@id":"https://cir.nii.ac.jp/crid/1390857136555640064","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@language":"en","@value":"DETECTION OF DELAMINATION AND PEELING ON INFRASTRUCTURE SURFACES BY TIME SERIES ANALYSIS AND 3D FEATURE EXTRACTION OF LASER 3D POINT CLOUD DATA"},{"@language":"ja","@value":"MMSレーザー点群データの時系列解析及び信号・画像処理によるインフラ表面の特徴抽出と浮き・剥離検知"}]}],"dataSourceIdentifier":[{"@type":"JALC","@value":"oai:japanlinkcenter.org:2014327539"},{"@type":"CROSSREF","@value":"10.2208/jscejj.24-13527"}]}