山东理工大学学报（自然科学版）
山東理工大學學報（自然科學版）
산동리공대학학보（자연과학판）
JOURNAL OF SHANDONG UNIVERSITY OF TECHNOLOGY(SCIENCE AND TECHNOLOGY)
2014年
6期
73-78
,共6页
三维激光扫描%有限元%体积%表面面积%相对精度
三維激光掃描%有限元%體積%錶麵麵積%相對精度
삼유격광소묘%유한원%체적%표면면적%상대정도
3D laser scanning%finite element%volume%surface area%relative accuracy
根据特定工程精度的要求，实体表面的三维激光扫描数据可以划分成不同大小的有限元，用于工程不规则曲面的面积和土石方量计算。首先对扫描数据进行去噪、过滤，获取扫描实体表面点云数据，然后将实体分割成若干有限元；对实体表面的单元进行二次曲面拟合，获取了曲面特征参数，用积分方法计算实体表面面积和体积。该方法计算结果与传统方法的结果相比，体积精度比传统解算精度高出一个数量级，相对精度达到1∶20万。
根據特定工程精度的要求，實體錶麵的三維激光掃描數據可以劃分成不同大小的有限元，用于工程不規則麯麵的麵積和土石方量計算。首先對掃描數據進行去譟、過濾，穫取掃描實體錶麵點雲數據，然後將實體分割成若榦有限元；對實體錶麵的單元進行二次麯麵擬閤，穫取瞭麯麵特徵參數，用積分方法計算實體錶麵麵積和體積。該方法計算結果與傳統方法的結果相比，體積精度比傳統解算精度高齣一箇數量級，相對精度達到1∶20萬。
근거특정공정정도적요구，실체표면적삼유격광소묘수거가이화분성불동대소적유한원，용우공정불규칙곡면적면적화토석방량계산。수선대소묘수거진행거조、과려，획취소묘실체표면점운수거，연후장실체분할성약간유한원；대실체표면적단원진행이차곡면의합，획취료곡면특정삼수，용적분방법계산실체표면면적화체적。해방법계산결과여전통방법적결과상비，체적정도비전통해산정도고출일개수량급，상대정도체도1∶20만。
According to accuracy of special engineering ,3D laser scanning data from object sur‐faces is usually divided into different sizes of finite elements to calculate areas and earthworks of irregular surfaces in engineering .First the object surface data is extracted by denoising and filte‐ring .Then dividing object into a certain amount of finite elements and fitting these elements with quadratic surface fitting method to get parameters of surface feathers .Finally ,surface areas and volumes by integration method are calculated .The comparison of results of between this method and the traditional ways shows that the precision of volume is ten times better than that of the traditional ways ,and the relative accuracy of which is 1 to 200 ,000 .
