共查询到20条相似文献,搜索用时 31 毫秒
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目前,采用单站光电经纬仪测量目标姿态的方式得到了广泛的应用。为了研究光电测量仪对目标姿态的高精度测量方法,本文基于光电经纬仪姿态角测量的基本方法和原理,建立了目标三维姿态角的数学模型,并对空间余弦的姿态测量方法进行了改进,以提高目标姿态的测量精度,通过模拟试验和测量精度分析验证改进方法的可靠性。研究结果表明,采用改进后的测量方法对目标姿态的测量精度有很大的提高,其测量误差小于0.5°,结果稳定可靠。研究结果可以采用光电经纬仪对目标姿态的更高精度测量的研究提供帮助。 相似文献
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根据经纬仪测量系统的测量原理推算其空间任一点位的中误差计算公式,并进行必要的仿真分析。通过误差分布规律的仿真图像,分析经纬仪测量系统所测得的空间三维坐标点位的精度,从而有效地提高了经纬仪测量系统野外作业的测量精度。 相似文献
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经纬仪实时空间测量系统研制与应用 总被引:1,自引:0,他引:1
本文介绍了经纬仪实时空间测量系统的基本原理和系统配置,描述了系统的测量精度和误差影响情况,介绍了系统所具有的功能;通过对标准量具的检测,证明该系统是可靠的,对特种精密工程测量的精度要求是可以满足的,在其它领域也有广泛的应用前景。 相似文献
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本文分析了陀螺仪的寻北原理,并以一种新型自动化陀螺经纬仪为例,探讨了地理纬度对陀螺补偿角、仪器常数和陀螺经纬仪测量精度的影响。在此基础上进一步讨论了陀螺经纬仪测量精度随地理纬度变化的关系,提出了提高陀螺经纬仪测量精度的方法和建议。 相似文献
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一种视觉引导经纬仪自动测量方法 总被引:1,自引:0,他引:1
文中将TM5100A经纬仪加载高精度摄像头构造视觉引导测量设备,标定十字丝中心点在像平面坐标系下的坐标,对经纬仪旋转水平角和垂直角与目标图像中心像素坐标之间的关系进行标定;摄像头采集目标图像并处理获取目标中心像素坐标,根据像素坐标与经纬仪旋转角关系计算经纬仪旋转角度,进而实现视觉引导经纬仪自动测量;对加载摄像头的经纬仪驱动误差进行测试,驱动误差允许的情况下测试并分析了视觉引导装置的点位测量精度、角度测量精度以及视觉引导准直测量精度,比人工测量精度高,符合工业测量的需求。 相似文献
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煤堆体积的测定,一直困扰着测绘同仁。无反射棱镜全站仪的问世,促成了高效、廉价的MH2001激光盘煤仪的诞生。介绍MH2001激光盘煤仪的测积原理、构成及其作业过程。 相似文献
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指出了桥梁挠度测量的重要性,并结合润扬大桥工程中开展的静载试验阐述了三种大型桥梁挠度测量方法,最后对它们进行了比较与分析。 相似文献
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船舶测量环境的特殊性给船舶测量带来了挑战,如何快速高效地完成船舶测量任务十分关键;本文采用全站仪配合球棱镜进行测量,在船头、船尾和船上分别架设仪器建立测站坐标系,通过公共点对各测站坐标系进行转换,统一建立龙骨坐标系,使船上所有测量点坐标均在龙骨坐标系下,以便在后期的安装测量及检测中能快速恢复龙骨坐标系并直接进行后续测量工作。事实表明该方法可以满足船舶测量的要求,准确可靠地完成了船舶测量的任务。 相似文献
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Andre Salvaro Furtado Despina Kopanaki Luis Otavio Alvares Vania Bogorny 《Transactions in GIS》2016,20(2):280-298
Most existing approaches aiming at measuring trajectory similarity are focused on two‐dimensional sequences of points, called raw trajectories. However, recent proposals have used background geographic information and social media data to enrich these trajectories with a semantic dimension, giving rise to the concept of semantic trajectories. Only a few works have proposed similarity measures for semantic trajectories or multidimensional sequences, having limitations such as predefined weight of the dimensions, sensitivity to noise, tolerance for gaps with different sizes, and the prevalence of the worst dimension similarity. In this article we propose MSM, a novel similarity measure for multidimensional sequences that overcomes the aforementioned limitations by considering and weighting the similarity in all dimensions. MSM is evaluated through an extensive experimental study that, based on a seed trajectory, creates sets of semantic trajectories with controlled transformations to introduce different kinds and levels of dissimilarity. For each set, we compute the similarity between the seed and the transformed trajectories, using different measures. The results showed that MSM was more robust and efficient than related approaches in the domain of semantic trajectories. 相似文献
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The emergence of technologies capable of storing detailed records of object locations has presented scientists and researchers with a wealth of data on object movement. Yet analytical methods for investigating more advanced research questions from such detailed movement datasets remain limited in scope and sophistication. Recent advances in the study of movement data has focused on characterizing types of dynamic interactions, such as single‐file motion, while little progress has been made on quantifying the degree of such interactions. In this article, we introduce a new method for measuring dynamic interactions (termed DI) between pairs of moving objects. Simulated movement datasets are used to compare DI with an existing correlation statistic. Two applied examples, team sports and wildlife, are used to further demonstrate the value of the DI approach. The DI method is advantageous in that it measures interaction in both movement direction (termed azimuth) and displacement. Also, the DI approach can be applied at local, interval, episodal, and global levels of analysis. However the DI method is limited to situations where movements of two objects are recorded at simultaneous points in time. In conclusion, DI quantifies the level of dynamic interaction between two moving objects, allowing for more thorough investigation of processes affecting interactive moving objects. 相似文献
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