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Stability Analysis of Contact Scanning Probe for Micro/Nano Coordinate Measuring Machine 被引量:2
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作者 李瑞君 范光照 +3 位作者 钱剑钊 黄强先 龚伟 苗晋伟 《纳米技术与精密工程》 EI CAS CSCD 2012年第2期125-131,共7页
关键词 微纳米三坐标测量机 扫描探头 稳定性分析 传感哭喊中
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ANALYSIS AND MEASUREMENT FOR THE DYNAMIC ERRORS OF COORDINATE MEASURING MACHINES 被引量:2
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作者 董晨松 张国雄 《Transactions of Tianjin University》 EI CAS 1998年第2期63-67,共5页
The analysis and calculating method of dynamic errors of CMMs during probing are discussed.To relate the dynamic displacement errors with the dynamic rotational errors a method for obtaining the displacement errors at... The analysis and calculating method of dynamic errors of CMMs during probing are discussed.To relate the dynamic displacement errors with the dynamic rotational errors a method for obtaining the displacement errors at the probing position from dynamic rotational errors is presented.It is pointed out that the finite element method might be used for modeling dynamic errors.However,dynamic errors are difficult to be modeled so a combined practical and theoretical approach is needed.In addition,the dynamic errors are measured with inductive position sensors. 展开更多
关键词 coordinate measuring machine (cmm) dynamic error finite element method(FEM)
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Cylindrical coordinate measuring machines: probe offset and workpiece clamping error
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作者 QIU Zu-rong WANG Cheng-lin +4 位作者 SU Zhi-kun LI Hao-peng XUE Jie LI Xing-hua LU Yao-huan 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2019年第3期205-212,共8页
A cylindrical coordinate measuring machine for the detection of large-size rotational parts is introduced. The measuring machine can simultaneously measure the geometrical dimensions, form and position errors of the i... A cylindrical coordinate measuring machine for the detection of large-size rotational parts is introduced. The measuring machine can simultaneously measure the geometrical dimensions, form and position errors of the inner and outer surfaces. Since the maximum length of the workpiece can reach 2 000 mm , it is difficult to be clamped and adjusted and easy to produce clamping error. The eccentricity can be up to 1.5 mm, which has an interaction effect with the probe mounting offset. We mainly study the probe offset of the measuring machine and the influence of the workpiece clamping error on the measurement. A method of controlling the offset of the measuring probe is proposed. The effect of the clamping error is eliminated through the space coordinate transformation of the workpiece axis, and the axis is fitted by the least square method. Finally, a common fixture can be realized to meet the clamping requirements of the workpiece. 展开更多
关键词 rotational parts probe offset ECCENTRICITY cylindrical coordinate measuring machine
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CAD Model-Based Intelligent Inspection Planning for Coordinate Measuring Machines 被引量:9
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作者 DONG Yude LIU Daxin +2 位作者 ZHAO Han WANG Wanlong WU Juan 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2011年第4期567-583,共17页
As the market competition among enterprises grows intensively and the demand for high quality products increases rapidly, product quality inspection and control has become one of the most important issues of manufactu... As the market competition among enterprises grows intensively and the demand for high quality products increases rapidly, product quality inspection and control has become one of the most important issues of manufacturing, and improving the efficiency and accuracy of inspection is also one of problems which enterprises must solve. It is particularly important to establish rational inspection planning for parts before inspecting product quality correctly. The traditional inspection methods have been difficult to satisfy the requirements on the speed and accuracy of modern manufacturing, so CAD-based computer-aided inspection planning (CAIP) system with the coordinate measuring machines (CMM) came into being. In this paper, an algorithm for adaptive sampling and collision-free inspection path generation is proposed, aiming at the CAD model-based inspection planning for coordinate measuring machines (CMM). Firstly, using the method of step adaptive subdivision and iteration , the sampling points for the specified number with even distribution will be generated automatically. Then, it generates the initial path by planning the inspection sequence of measurement points according to the values of each point's weight sum of parameters, and detects collision by constructing section lines between the probe swept-volume surfaces and the part surfaces, with axis-aligned bounding box (AABB) filtering to improve the detection efficiency. For collided path segments, it implements collision avoidance firstly aiming at the possible outer-circle features, and then at other collisions, for which the obstacle-avoiding movements are planned with the heuristic rules, and combined with a designed expanded AABB to set the obstacle-avoiding points. The computer experimental results show that the presented algorithm can plan sampling points' locations with strong adaptability for different complexity of general surfaces, and generate efficient optimum path in a short time and avoid collision effectively. 展开更多
关键词 coordinate measuring machines (cmm sampling strategy adaptive subdivision path planning collision detection collision avoidance bounding box
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ERROR COMPENSATION OF COORDINATE MEASURING MACHINES WITH LOW STIFFNESS 被引量:2
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作者 Zhao Yingjian Zhang Guoxiong (College of Precision Instruments and Optical Electronics, Tianjin University) 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2000年第2期159-164,共6页
A technique for compensating the errors of coordinate measuring machines (CMMs) with low stiffness is proposed. Some additional items related with the force deformation are introduced to the error compensation aquatio... A technique for compensating the errors of coordinate measuring machines (CMMs) with low stiffness is proposed. Some additional items related with the force deformation are introduced to the error compensation aquations. The research was carried on a moving colunm horizontal arm CMM. Experimental results show that both the effects of systematic components of error motions and force deformations are greatly reduced, which shows the effectiveness of proposed technique. 展开更多
关键词 Error compensation coordinate measuring machine(cmm) Low stiffness
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COORDINATE MEASURING MACHINE PROBING ACCESSIBILITY
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作者 Wu Yongqing Xie Zexiao Liu Shugui Zhang Guoxiong State Key Laboritory of Precision Measuring Technology and Instrument, Tianjin University 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2001年第1期45-50,共6页
The accessibility of coordinate measuring machines (CMMs) in dimensional inspection is studied. The problem of computing the global accessibility cone is solved using a method of angle representation. Otherwise, the l... The accessibility of coordinate measuring machines (CMMs) in dimensional inspection is studied. The problem of computing the global accessibility cone is solved using a method of angle representation. Otherwise, the length and volume of probe are considered sufficiently so that all the feasible probe orientations could be determined for the inspection of a workpiece when a touch trigger probe is used and the shortcoming of abstracting a probe as an infinite half line could be overcome completely. In the end, an example is given to explain the method. 展开更多
关键词 ACCESSIBILITY probe orientation COLLISION coordinate measuring machines(cmms) SLOT
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Application of NURBS for Obtaining Free Form Curves and Surfaces in Spur and Helical Gears by Using CMM (Coordinate Measurement Machine)
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作者 Luiz Henrique Melo Silva Nobrega Verilton Nunes da Silva +3 位作者 Jose Carlos de Lima Junior Joao Bosco de Aquino Silva Igor Lucena Peixoto Andrezza Rafael Franklin Alves Silva 《Journal of Mechanics Engineering and Automation》 2014年第5期432-440,共9页
Currently, engineering processes require reduced manufacturing time and low cost, in addition to the growing demand for workpieces with high accuracy. Workpieces with complex geometries and free forms has been a commo... Currently, engineering processes require reduced manufacturing time and low cost, in addition to the growing demand for workpieces with high accuracy. Workpieces with complex geometries and free forms has been a common practice in industries from different sectors such as: automotive, aeronautics, bioengineering among others. One way to satisfy the market requirements satisfactorily is making measurements more efficient to make the production process faster, in other words, it is necessary to make the inspection system more accurate and flexible. The coordinate measuring evolved over the past three decades and today it is the technology that best meets the requirements of modem manufacturing through CMMs (coordinate measurement machines). The CMMs are important tool for design, fabrication and inspection of manufactured products, also used in the application of reverse engineering. These machines are also used by engineers in order to produce an accurate digital model in a virtual space for later use in CAD (computer-aided design)/CAM (computer-aided manufacturing). It is worth mentioning that the accuracy of the modeling process of given piece depends on the number of control points that are captured on the workpiece surface. Consequently, the laser inspection systems are the best tools for use in reverse engineering, but more expensive when compared to contact measurement systems that use the TTP (touch trigger probe), also used by CMMs. In this case, this paper aims to present an approach based on NURBS (non-uniform rational B-splines) to obtain free form curves and surfaces from a group of points obtained by using a contact sensor, the touch trigger probe. NURBS is an important mathematical tool and consists of generalizations of Bezier curves and surfaces and B-splines. The approach proposed in this paper can be applied for obtaining free form curves and surfaces in spur and helical gears. Experimental results obtained by measuring spur gears showed that the NURBS technique contributes for application of CMMs with touch trigger probe in reverse engineering. 展开更多
关键词 coordinate measurement machine touch trigger probe NURBS reverse engineering.
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Error separation in CMM coordinate metrology
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作者 Salah H R Ali M G El-Sherbiny 《Journal of Measurement Science and Instrumentation》 CAS 2014年第1期1-9,共9页
Form error measurement is a critical exercise in providing measures for the quality control in the precision manufacturing industry.Coordinate measuring machine (CMM) is one of the automated systems used in the accu... Form error measurement is a critical exercise in providing measures for the quality control in the precision manufacturing industry.Coordinate measuring machine (CMM) is one of the automated systems used in the accurate and precise dimensional measurements and geometrical form.This paper aims to study the effect of dynamic original unforeseeable errors at different undulations per revolution (UPR) of standard artifact measurement using selected two types of CMM touchtriggering stylus.Stylus-type and stylus-speed parameters were adopted and utilized throughout the course of experiment.The results are analyzed using fast Fourier transformation to obtain foreseeable geometrical errors due to CMM machine structure and stylus scanning speeds.The results of experiment successfully indicate that the number of UPR plays an important role in determining the CMM accuracy level of the roundness measurement result.Some specific error equations for stylus system and machine structure responses have been postulated and analysed to empirically predict the accuracy of PRISMOBridge-CMM-type at National Institute for Standards (NIS) in egypt. 展开更多
关键词 coordinate metrology undulation per revolution (UPR)analysis cooridinate measuring machine (cmm stylus speed error
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Multi-Aspect Value of Measuring Systems and Methods Based on the Results of Roundness Measurements
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作者 Miodrag Hadzistevic Imre Nemedi +2 位作者 Milenko Sekulic Martin Bosak Janko Hodolic 《Journal of Mechanics Engineering and Automation》 2012年第8期514-530,共17页
The increase of quality consciousness brings about the growth of significance of metrological systems. Besides the significance, the level of automatization, flexibility, accuracy, et al. have advanced. The modern mea... The increase of quality consciousness brings about the growth of significance of metrological systems. Besides the significance, the level of automatization, flexibility, accuracy, et al. have advanced. The modern measuring systems are constructed so that nearly all necessary dimensional characteristics can be measured with them. However, conventional measuring systems are provided for particular mode measurements. This research paper presents and compares several conventional and modem measuring systems and methods. The measured value is roundness, one of the basic shapes of cross section in mechanical engineering. This paper arises in search of answers for the question whether conventional measuring techniques and equipments are made redundant because of the modern ones. In what segments and in which criterion are modem methods preferable? 展开更多
关键词 measuring systems ROUNDNESS V-block method coordinate measuring machine (cmm rotational datum method(RDM).
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CMM面向任务的多测量策略测量不确定度评定 被引量:13
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作者 李红莉 陈晓怀 +3 位作者 杨桥 王宏涛 程银宝 王汉斌 《电子测量与仪器学报》 CSCD 北大核心 2015年第12期1772-1780,共9页
基于产品几何技术规范GPS,研究了常规测量、替代测量及补偿测量三种测量策略下的CMM面向尺寸测量任务的测量不确定度评定技术。对各测量策略下的测量不确定度影响来源进行分析和不确定度评定建模,给出具体的评定方法。通过孔径测量实例... 基于产品几何技术规范GPS,研究了常规测量、替代测量及补偿测量三种测量策略下的CMM面向尺寸测量任务的测量不确定度评定技术。对各测量策略下的测量不确定度影响来源进行分析和不确定度评定建模,给出具体的评定方法。通过孔径测量实例,给出应用这三种测量策略进行不确定度评定的过程,并比较评定结果,总结出这三种测量策略的优缺点及适用场合,为测量机用户根据实际需求评定面向尺寸测量任务的测量不确定度提供应用参考。 展开更多
关键词 坐标测量机 面向任务 测量不确定度 测量策略
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等高法叶片型面CMM测量数据处理算法研究 被引量:22
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作者 蔺小军 郭研 +4 位作者 吴广 樊宁静 江波 高晓斐 赵赟 《仪器仪表学报》 EI CAS CSCD 北大核心 2013年第11期2442-2450,共9页
三坐标测量机对叶片进行测量是保证叶片加工质量的必要手段。但是其型面测量数据处理非常复杂。在分析不同叶片型面公差的基础上,提出了恒值轮廓度、变值轮廓度、正轮廓度和负轮廓度公差带的建立方法。针对叶片等高法测量,在数据处理时... 三坐标测量机对叶片进行测量是保证叶片加工质量的必要手段。但是其型面测量数据处理非常复杂。在分析不同叶片型面公差的基础上,提出了恒值轮廓度、变值轮廓度、正轮廓度和负轮廓度公差带的建立方法。针对叶片等高法测量,在数据处理时采用最小区域原则对测量点和理论截面轮廓线进行匹配以分离叶片叶型误差、扭转误差和弯曲变形误差,并提出了基于公差带的匹配目标函数、匹配方法和有约束的匹配原则。针对叶片叶型参数计算,提出了叶片前后缘圆弧拟合方法和最大厚度计算方法。最后通过实例表明该算法对叶型参数和误差计算的正确性。 展开更多
关键词 叶片测量 等高法 坐标测量机 匹配 叶型误差
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基于三维CAD和CMM的计算机辅助检测规划系统的研究与实现 被引量:4
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作者 刘达新 董玉德 +1 位作者 赵韩 王万龙 《中国机械工程》 EI CAS CSCD 北大核心 2009年第18期2207-2213,共7页
对基于三维CAD和三坐标测量机的计算机辅助检测规划(CAIP)系统的各项关键技术进行研究,给出了相关的实现算法、原理及解决思路,着重解决采样及路径规划中的相关问题。对于采样规划,指出了决定采样点数量及分布的相关因素,并提出了一种... 对基于三维CAD和三坐标测量机的计算机辅助检测规划(CAIP)系统的各项关键技术进行研究,给出了相关的实现算法、原理及解决思路,着重解决采样及路径规划中的相关问题。对于采样规划,指出了决定采样点数量及分布的相关因素,并提出了一种以规则采样为基础的步长自适应再分采样方法;对于路径规划,先对测量点采用按参数加权和大小排序的方法进行检测顺序规划以形成初始路径,再以碰撞检查及规避对其进行改进,生成无碰撞的检测路径。采用Microsoft Visual C++开发环境开发了CAIP系统,计算机试验验证了相关算法的可行性,结果表明该系统能高效率、智能化地完成常见零件的自动检测工作。 展开更多
关键词 三坐标测量机(cmm) CAD/cmm集成 采样策略 路径规划 碰撞规避
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CMM测量正交面齿轮的误差理论分析 被引量:6
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作者 王志 石照耀 《北京工业大学学报》 EI CAS CSCD 北大核心 2012年第5期663-667,共5页
基于面齿轮啮合理论和面齿轮坐标转换关系建立了面齿轮齿面数学模型,分析了面齿轮齿面上任一点的法线向量;基于该模型研究了在采用坐标测量机测量面齿轮齿面误差时由于测量坐标系和面齿轮设计坐标系不重合造成的误差,同时分析了坐标测... 基于面齿轮啮合理论和面齿轮坐标转换关系建立了面齿轮齿面数学模型,分析了面齿轮齿面上任一点的法线向量;基于该模型研究了在采用坐标测量机测量面齿轮齿面误差时由于测量坐标系和面齿轮设计坐标系不重合造成的误差,同时分析了坐标测量机测头直径对测量误差的影响;提出了误差补偿公式,为面齿轮的坐标测量奠定了理论基础. 展开更多
关键词 面齿轮 误差 三坐标测量机
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自由曲面CMM测量测头半径补偿方法 被引量:8
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作者 蔺小军 王增强 单晨伟 《航空制造技术》 2011年第10期75-77,85,共4页
测量机测量曲线和曲面时获取的数据是测头中心坐标值,因此必须对测头半径进行补偿。在总结目前测头补偿方法的基础上,提出以达到测量目的为宗旨,将自由曲面测量分为检测模式和重构模式,根据测量模式采取不同方法对测头半径进行补偿。检... 测量机测量曲线和曲面时获取的数据是测头中心坐标值,因此必须对测头半径进行补偿。在总结目前测头补偿方法的基础上,提出以达到测量目的为宗旨,将自由曲面测量分为检测模式和重构模式,根据测量模式采取不同方法对测头半径进行补偿。检测模式下通过比较测头半径与测点到被测曲面的距离大小来判断曲面是否合格,重构模式下通过求取测头球心面的等距面来获得被测曲面,从而实现测头半径补偿。对于点到曲面距离的算法、等距面计算进行了研究。 展开更多
关键词 测量机 测头半径补偿 点到曲面距离等距面
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基于CMM和CAXA鼠标曲面的逆向设计 被引量:2
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作者 田启华 黄敏 +1 位作者 曾孟雄 吴海华 《三峡大学学报(自然科学版)》 CAS 2008年第1期84-86,共3页
基于逆向设计理论,以三坐标测量机(CMM)和CAXA制造工程师为平台,将经过多项式拟合的数据导入CAXA制造工程师中,利用CAXA制造工程师的NURBS自由曲面造型功能重建三维模型,实现了鼠标曲面的逆向设计.
关键词 逆向设计 鼠标曲面 曲面造型 三坐标测量机(cmm)
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基于NC代码的CMM测量编程系统 被引量:1
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作者 蔺小军 王增强 +1 位作者 史耀耀 张凤娟 《机械科学与技术》 CSCD 北大核心 2011年第9期1539-1542,共4页
为了提高测量机(CMM)的工作效率和优化测量路径,测量机脱离测量机软件系统实现自动测量编程是非常必要的。提出了CAD/CAM系统进行CMM测量编程的方法。通过CAD/CAM系统进行测量路径规划并生成数控程序(NC)代码,再将NC代码转化为CMM测量... 为了提高测量机(CMM)的工作效率和优化测量路径,测量机脱离测量机软件系统实现自动测量编程是非常必要的。提出了CAD/CAM系统进行CMM测量编程的方法。通过CAD/CAM系统进行测量路径规划并生成数控程序(NC)代码,再将NC代码转化为CMM测量控制数据,最后通过测量机读入这些数据控制测量机进行测量。开发了基于NC代码的CMM自动编程数据处理系统。最后通过实例证明该方法有效实用。 展开更多
关键词 测量机 NC代码 测量机编程 测量编程系统
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自由曲面CMM测量中球头半径空间补偿方法的研究 被引量:4
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作者 崔焕勇 李兆前 高琦 《机床与液压》 北大核心 2006年第3期48-50,共3页
为解决自由曲面CMM测量中测头半径补偿问题,沿用了基于测头中心点所在曲面法矢估算的空间补偿方法,引入转动惯量法进行测头中心点所在曲面各点处法矢的求解,并解决了边界点补偿的问题。该方法避免了根据离散点构建样条曲面而进行大量而... 为解决自由曲面CMM测量中测头半径补偿问题,沿用了基于测头中心点所在曲面法矢估算的空间补偿方法,引入转动惯量法进行测头中心点所在曲面各点处法矢的求解,并解决了边界点补偿的问题。该方法避免了根据离散点构建样条曲面而进行大量而复杂的计算过程,数据处理简单,并可通过程序实现,具有较高的效率。 展开更多
关键词 三坐标测量 球头半径 补偿 转动惯量
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智能CMM系统中摄像机的标定方法 被引量:1
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作者 赵金才 董晋峰 +1 位作者 刘源 黄风山 《微电子学与计算机》 CSCD 北大核心 2009年第6期265-268,共4页
将计算机视觉引入到坐标测量系统中能够实现零件位姿的识别.在建立一阶径向畸变摄像机模型的基础上,分析并得到了需要标定才能确知的摄像机内外部参数,对求解这些参数的方法和步骤进行了详细说明,结合坐标测量机(CMM)精度高的特点及白... 将计算机视觉引入到坐标测量系统中能够实现零件位姿的识别.在建立一阶径向畸变摄像机模型的基础上,分析并得到了需要标定才能确知的摄像机内外部参数,对求解这些参数的方法和步骤进行了详细说明,结合坐标测量机(CMM)精度高的特点及白色陶瓷标准球的良好光学特性提出了一种基于摄像机平动的非共面标定方法.标定实验及结果分析表明该标定方法最终在X、Y方向上所引起的误差小于0.4994mm. 展开更多
关键词 径向畸变 摄像机 标定 坐标测量机
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高速扫描CMM的几何动态误差 被引量:1
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作者 陈燕玲 韦进文 郭俊杰 《桂林理工大学学报》 CAS 北大核心 2011年第2期303-308,共6页
利用有限元软件研究了CMM在快速探测时导轨几何误差的动态模型。研究表明,X导轨的绕Y和Z方向的角误差εY(x)与εZ(x)能产生显著的动态效应。它们的动态误差造成CMM,尤其是低刚度CMM中对应测端静态分量大的改变。由此,提出一个能提高CMM... 利用有限元软件研究了CMM在快速探测时导轨几何误差的动态模型。研究表明,X导轨的绕Y和Z方向的角误差εY(x)与εZ(x)能产生显著的动态效应。它们的动态误差造成CMM,尤其是低刚度CMM中对应测端静态分量大的改变。由此,提出一个能提高CMM快速探测时误差补偿精度的简单方法,即根据探测速度及Y坐标值对几何误差曲线进行平滑化。 展开更多
关键词 坐标测量机(cmm) 快速探测 几何误差 动态误差 误差补偿 有限元
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CAD系统在CMM测量中的应用 被引量:1
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作者 蔺小军 史耀耀 +2 位作者 汪文虎 任军学 刘维伟 《机床与液压》 北大核心 2006年第1期158-159,169,共3页
对CAD系统在三坐标测量机测量中的应用进行了介绍。通过CAD系统可以完善和扩大测量机的功能,实现曲面测量时的测头半径补偿,并能对测量数据进行处理。文中对实现这些功能的方法和步骤进行了说明。
关键词 CAD cmm 坐标测量机 测量机软件系统
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