双目系统的岩体结构面产状非接触测量方法  

NON-CONTACT MEASUREMENT OF ROCK MASS DISCONTINUITY OCCURRENCE WITH BINOCULAR SYSTEM

作　　者：周春霖[1] 朱合华[1] 赵文[2] 

机构地区：[1]同济大学岩土及地下工程教育部重点实验室,上海200092 [2]东北大学资源与土木工程学院,辽宁沈阳110004

出　　处：《岩石力学与工程学报》2010年第1期111-117,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(40672184);教育部东北大学博士访学计划

摘　　要：提出一种改进的摄像机姿态获取方法,并据其实现岩体结构面产状的非接触测量。主要步骤为:(1)将摄像机安置于云台上,令摄像机坐标系与云台坐标系重合,然后将其固定;(2)通过规范拍摄过程将摄像机姿态参数减少为2个,然后以云台平面产状测量结果换算得到;(3)通过摄像机姿态参数完成坐标系转换,于岩体三维数字模型上测量并得到结构面产状。对该方法中摄像机姿态测量误差造成的目标岩体结构面产状测量传播误差进行分析,通过对边坡和隧道开挖掌子面岩体的现场试验,发现该方法简便易行、精度与传统测量方法接近并有较大提升空间。此方法可以方便地实现岩体结构面产状完全非接触测量,并有效扩大测量范围、提高测量效率,避免测量人员暴露于裸露岩体下的危险。A modified pose acquiring method is advanced, which can realize non-contact measurement of rock mass discontinuities occurrence with following steps： （1） setting camera on the cloud platform, adjusting to let camera coordinate system and cloud platform coordinate system be coincidence and fixing them; （2） reducing the number of pose parameters with regular photographing procedure, and getting them from the occurrence of platform extended plane; and （3） translating 3D digital model of rock mass generated by binocular system from local coordinate system to world coordinate system and measuring the discontinuities occurrences. After the above-mentioned steps, propagation error caused by pose measuring error is analyzed. The suggested method is used to survey the rock mass discontinuities occurrences of slope and rock tunnel excavation face in field. Compared with traditional method, the proposed method is convenient to be used in field to achieve complete non-contact measurement with good precision, and the precision can be advanced easily. With this method, the measuring range of rock mass discontinuity occurrence is expanded, and the efficiency can be advanced; and the risk of survey crew exposing under rock mass can also be avoided.

关 键 词：岩石力学 岩体结构面 双目系统 摄像机姿态:产状 非接触测量 

分 类 号：TU45[建筑科学—岩土工程]