共查询到20条相似文献，搜索用时 15 毫秒
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FENG Wenhao 《地球空间信息科学学报》2001,4(4):66-72
1 ＩｎｔｒｏｄｕｃｔｉｏｎＢｙｖｉｒｔｕｅｏｆｔｈｅｃｏｎｔｒｏｌｐｏｉｎｔｓａｎｄ/ｏｒｒｅｌａｔｉｖｅｃｏｎｔｒｏｌｗｏｒｋ ,ｔｈｅｍａｉｎｏｂｊｅｃｔｉｖｅｏｆｃｏｎｔｒｏｌｓｕｒｖｅｙ ｉｎｇｉｎｃｌｏｓｅｒａｎｇｅｐｈｏｔｏｇｒａｍｍｅｔｒｙｉｓｔｏｂｒｉｎｇｔｈｅｃｌｏｓｅｒａｎｇｅｐｈｏｔｏｇｒａｍｍｅｔｒｉｃｎｅｔｕｎｄｅｒｔｈｅｓｐｅｃｉ ｆｉｅｄｏｂｊｅｃｔｓｐａｃｅｃｏｏｒｄｉｎａｔｅｓｙｓｔｅｍ .Ｂｅｓｉｄｅｓｔｈｅｓｅ ｌｅｃｔｉｏｎｏｆｏｂｊｅｃｔｓｐａｃｅｃｏｏｒｄｉ… 相似文献
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The concepts of “confining structure” and structure light are illuminated in this paper. A laser theodolite with three freedoms of rotation, which is aimed at “confining structure”, is developed. Various scanning modes and their mathematical models based on laser theodolite with three freedoms of rotation are discussed. According to the features of a huge object the structure light engineering surveying based on laser theodolite with three freedoms of rotation is determined as the main method in an actual application. The observation of four sound concrete posts and forced centering plates. Subsequently, it is transformed into the huge object coordinate system. The scanning mode with plumb plane is selected as the main mode in the whole work. And other assistant methods, such as close range photogrammetry and the method of using reflection sheet, are applied to the work of “scanning dead angle”. At last, a surveying accuracy estimation of this method is done and a surveying accuracy test is finished. It can be concluded that the structure light engineering surveying based on laser theodolite with three freedoms of rotation is considered to be an effective and applied method, and has many superiority to some other surveying methods in the work of surveying “confining structure”. 相似文献
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FENG Wenhao LI Xin 《地球空间信息科学学报》2001,4(1):28-36
1 ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｏｕｒｃｏｕｎｔｒｙ ,ｔｈｅｓｕｒｖｅｙｉｎｇｗｏｒｋｏｎｉｎｄｕｓｔｒｉａｌｏｂｊｅｃｔｓｈａｖｅ ｇｒａｄｕａｌｌｙｉｎｃｒｅａｓｅｄ .Ｔｈｏｓｅｉｎｄｕｓｔｒｉａｌｏｂｊｅｃｔｓｉｎｃｌｕｄｅｒａｉｌｗａｙａｎｄｈｉｇｈｗａｙｔｕｎｎｅｌｓ,ｖａｒｉ ｏｕｓｏｉｌａｎｄｇａｓｃａｎｓ ,ｖａｒｉｏｕｓａｉｒｃｒａｆｔ,ｓｈｅｌｌｏｆｃａｒｓ,ｌａｒｇｅｍｉｌｉｔａｒｙａｎｔｅｎｎａｕｓｅｄｆｏｒｓｃｏｕｔｉｎｇｓｔｅａｌｔｈｐｌａｎｅ ,ｓｈｉｐ ,ｉｎｔｅｒｎａｌｓｔ… 相似文献
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Over the past decade, photogrammetry has been increasingly applied as a precise three dimensional measuring tool in industrial and engineering works. Analytical photogrammetry is now routinely employed in tasks of measurement as diverse as machine tool inspection and fixture checking, structural deformation monitoring, the provision of control databases to guide industrial robots and the measurement of structures in earth orbit. Traditional photogrammetric techniques and instrumentation are usually inappropriate for industrial work and the development of complete, fully integrated close range photogrammetric systems has recently gained considerable impetus. This paper details some of the significant new developments in industrial photogrammetry, with particular reference to technological advances in the Simultaneous Triangulation and Resection System (STARS) designed by Geodetic Services, Inc. for industrial photograininetry. Practical aspects of industrial measurement are also presented in a review of some of the varying tasks that GSI has carried out in recent years. Emphasis is placed on demonstrating the flexibility, accuracy, reliability and economy of photogrammetry, as well as the progress made in automating this measurement technique. 相似文献
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连镇华 《测绘与空间地理信息》2011,34(1):188-191
总结在晋江市1:500航测成图项目中数码影像、像片控制测量、外业调绘与补测等方面应用的新技术、新工艺,对基于数码影像结合全数字航空摄影测量系统生产1:500地形图的精度进行佑算和验证,提出该技术的发展展望. 相似文献
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无人机航摄系统作为传统航空摄影测量手段的有力补充,在小区域大比例尺地形测绘领域发挥了积极有效的作用。本文主要从像片重叠度和像片旋偏角两个方面对轻型无人机航摄获取的影像进行检查和分析,探讨无人机影像质量检查的内容、存在的问题和改进方式。 相似文献
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基于笔者多年从事地籍测量的工作经验,以地籍测量中控制测量方法为研究对象,探讨了地籍测量中常用的四种控制测量方法的优缺点及应用精度差异,希望为同行提供一定的参考和借鉴。 相似文献
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明代石碑高精度真实纹理三维建模应用 总被引：1，自引：1，他引：0
为了解决精细化文物三维测绘精细建模的难题,本文利用手持式高精度三维激光扫描技术对栅栏墓园内的利玛窦墓碑、汤若望墓碑、南怀仁墓碑进行了高精度真实纹理三维激光扫描建模的研究,保证了文物模型的精度、精细度和完整性。手持式高精度三维激光扫描技术结合了三角测量、激光测量、近景摄影测量、自定位等技术手段,实现了对具有一定体量的复杂纹理文物的精细化测绘。本文通过对三角测量技术和近景摄影测量技术的基础原理进行分析,将两者的特点相结合,摸索出一套针对精细纹理和复杂雕刻的文物三维扫描技术流程。通过对手持式激光扫描技术的研究,验证了该技术对文物测绘的可行性和可靠性,为中尺度体量文物测绘总结了一套全新的技术流程,为今后探索针对不同体量的文物三维测绘,以及多种测绘技术相融合奠定了基础。 相似文献
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激光雷达测量技术及其应用研究 总被引：1，自引：0，他引：1
对激光雷达测量技术的发展进行了概括 ,介绍了激光雷达测量技术的原理 ,探讨了利用激光雷达进行堆体体积测量的技术和方法 ,在此基础上发展了一个激光雷达测量系统 ,并在实际测量工作中进行了应用。实验表明 ,激光雷达测量技术与传统的测量方法相比 ,在测量精度、自动化程度和测量数据可视化等方面具有明显的优点 ,并且极大地减轻了劳动强度 ,提高了工作效率。 相似文献
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土石方计算工程的实际意义非常重大,因而选择基于多基线数字近景摄影测量系统的土石方计算方法进行了研究,并通过实例与其他常用土石方计算方法进行了比较,结果表明多基线近景摄影测量技术在土石方计算中具有速度快、精度高、工作流程简单等特点. 相似文献
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通过eBeePlus免像控无人机航空摄影测量系统应用于1∶500地形图测绘工程实例,探究其在实践中的制图精度及适用性。使用emotion3、Pix4dMapper等软件进行外业航飞、内业影像处理,对比分析RTK和PPK两种解算方式下的制图精度,两者均满足规范要求,PPK解算方式更适宜在实践中使用;结合Eps软件制作数字线划地图,对于影像中无法提取的房屋边线、植被覆盖区域地物,采取全野外调绘、实测进行补充,阐述了无人机航测与传统数字化测图相结合的作业方式。 相似文献
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The use of CCD cameras for digital photogrammetry has only slowly been taken up by the photogrammetric community. However, the pace of change is quickening with better understanding and cheaper equipment. Recently a decision was made to start some research into close range three dimensional digital measurement. The overall objective was to develop a low cost system for the automated measurement of small industrial objects. This shorter contribution describes the initial stages of this work. 相似文献