摘要
在对工程基坑变形情况进行观测中,通常利用全球导航卫星系统(Global Navigation Satellite System,GNSS)来实现数字化测量,但该方法误差较大,因此,提出摄影测量的数字化测量工程基坑变形观测系统设计。首先建立摄影测量成像模型,确定摄影测量的图像呈现。其次对摄像中基坑的运动动态噪音利用科尔曼滤波法进行数据处理。最后对处理后的数据图像使用直接线性变换解法得出被测体的位移数据,实现变形观测。为验证系统的可行性,对使用设计系统的某一工程的数据进行实例分析,结果证明设计系统可以实现对基坑竖向位移和水平位移的观测,同时精度较高,满足设计要求和使用需求。
In the current observation of engineering foundation pit deformation,GNSS is usually used to realize digital measurement,but this method has a big error,so the design of digital measurement engineering foundation pit deformation observation system based on photogrammetry was put forward in this paper.Firstly,the photogrammetry imaging model was established to determine the image presentation of photogrammetry.Secondly,the dynamic noise of foundation pit in camera shooting was processed by using Coleman filtering method.Finally,the displacement data of the measured object was obtained using the direct linear transformation method to realize the deformation observation.In order to verify the feasibility of the system,the data of a project using the design system were analyzed.The results showed that the design system could obtain the vertical and horizontal displacements of the foundation pit with high accuracy and meet the design and use requirements.
作者
牛冲
NIU Chong(Shandong GEO-Surveying and Mapping Institute, Jinan Shandong 250013,China)
出处
《北京测绘》
2021年第8期1002-1006,共5页
Beijing Surveying and Mapping
基金
山东省地质测绘院科技创新发展基金(chyky201902)。
关键词
数字化测量
基坑变形
科尔曼滤波法
位移数据
观测系统
digital measurement
foundation pit deformation
Coleman filtering method
displacement data
observation system
