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Optomechatronic Technologies (ISOT), 2010 International Symposium on : 25-27 Oct. 2010 : [Toronto, ON]. International Symposium on Optomechatronic Technologies (2010 : Toronto, Ont.)最新文献

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Model shape oriented robust matching of dot cloud data based and its application to defect recognition 基于模型形状的点云数据鲁棒匹配及其在缺陷识别中的应用
H. Kayaba, H. Takauji, S. Kaneko, M. Toda, Kouji Kuno, H. Suganuma
We propose a robust algorithm for matching three-dimensional dot cloud data in an effort to detect defects during manufacturing processes. We apply our proposed method to inspect a complex three-dimensional die-cast product. Our approach recognizes the difference between two data sets as a defect after matching the data sets. Moreover, our method improves matching accuracy by detecting geometrical features such as edge points, and by using such property values as gradients. Fundamental experiments using real three-dimensional dot cloud data show that the method is effective as a defect inspection system.
我们提出了一种鲁棒的三维点云数据匹配算法,以检测制造过程中的缺陷。我们应用我们提出的方法来检查一个复杂的三维压铸产品。我们的方法在匹配数据集后将两个数据集之间的差异识别为缺陷。此外,我们的方法通过检测几何特征(如边缘点)和使用这些属性值(如梯度)来提高匹配精度。利用真实三维点云数据进行的基础实验表明,该方法是一种有效的缺陷检测系统。
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引用次数: 0
A 100Hz real-time sensing system of textured range images 一种100Hz的纹理距离图像实时传感系统
H. Ishiyama, Kenji Terabayashi, K. Umeda
This paper describes a small high-speed range image sensor which can acquire a range image mapped with a color texture captured by another camera. The constructed sensor consists of only commercially available products: a monochrome CCD camera, a color CCD camera, a laser projector, and two optical filters. The resolution of the range image is 19×19 for a total of 361 points, and the measurement speed is 100Hz. A three-dimensional (3D) mapping method using the constructed sensor is introduced. The measurement precision of the sensor and the accuracy of the constructed 3D map are evaluated with some experiments. In addition, measurement examples of the sensor are shown. Experiments verify that the constructed sensing system can acquire 100Hz real-time textured range images and that it can be applied to 3D mapping by using range and color information.
本文介绍了一种小型高速距离图像传感器,它可以获取与另一台相机捕获的彩色纹理映射的距离图像。所构建的传感器仅由市售产品组成:单色CCD相机、彩色CCD相机、激光投影仪和两个滤光片。距离图像分辨率为19×19,共361个点,测量速度为100Hz。介绍了一种利用构造好的传感器进行三维映射的方法。通过实验对传感器的测量精度和所构建的三维地图的精度进行了评价。此外,还给出了传感器的测量实例。实验验证了所构建的传感系统能够获取100Hz的实时纹理距离图像,并可将其应用于利用距离和颜色信息进行三维映射。
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引用次数: 3
Optical coherence tomography: Current biomedical applications and future clinical utility 光学相干断层扫描:当前的生物医学应用和未来的临床应用
B. Standish, M. Leung, A. Mariampillai, V. Yang
Clinicians are faced with an ever-increasing plethora of choices for the early detection of life-threatening medical conditions, such as heart disease or cancer. Many of these pathologies require invasive biopsy procedures to verify the presence and stage of disease progression. Once identified the patient must then undergo treatment, where current imaging techniques lack the resolution for treatment monitoring that can be correlated to the gold standard of disease-free survival, namely histology. Optical coherence tomography is an exciting, high-resolution (∼10μm) non-invasive, imaging modality that may provide solutions to these problems and aid in the early detection and treatment monitoring of diseases. As the technology matures there is great potential for optical coherence tomography to become a clinical tool to aid in the clinical decision making process in an effort to properly provide patient risk stratification and subsequent appropriate therapy. In this article we present potential solutions to existing technical hurdles and speculate on future clinical implementation.
临床医生面临着越来越多的选择,以早期发现危及生命的疾病,如心脏病或癌症。许多这些病理需要侵入性活检程序来验证疾病进展的存在和阶段。一旦确诊,患者就必须接受治疗,而目前的成像技术缺乏与无病生存的金标准(即组织学)相关的治疗监测的分辨率。光学相干断层扫描是一种令人兴奋的高分辨率(~ 10μm)非侵入性成像方式,可以为这些问题提供解决方案,并有助于疾病的早期检测和治疗监测。随着技术的成熟,光学相干断层扫描有很大的潜力成为一种临床工具,以帮助临床决策过程,努力正确地提供患者风险分层和随后的适当治疗。在这篇文章中,我们提出了现有技术障碍的潜在解决方案,并推测未来的临床实施。
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引用次数: 1
Performance enhancement of organic solar cells using plasmonic effects 利用等离子体效应增强有机太阳能电池的性能
A. Rostami, H. Rasooli, S. Andalibi, F. Janabi-Sharifi
We have investigated an analytic model that describes the light absorption and carrier transport in bulk heterojunction organic solar cells based on poly (3-hexylthiophene): (6, 6) — phenyl-C61-buteric-acid-methyl ester (P3HT:PCBM) blend. In order to calculate the power conversion efficiency (PCE) the current-voltage characteristics is analyzed and plotted by varying the active layer thickness, a device with higher PCE is obtained. We inserted the metal nanoparticles (MNPs) inside the active layer and studied the device structure using Finite Difference Time Domain (FDTD) method. Considering the proposed model, we observed that, the absorption coefficient and PCF are increased considerably.
我们研究了基于聚(3-己基噻吩):(6,6)-苯基- c61 -丁酸-甲酯(P3HT:PCBM)共混物的体异质结有机太阳能电池的光吸收和载流子输运的分析模型。为了计算功率转换效率(PCE),分析并绘制了改变有源层厚度的电流-电压特性,得到了具有更高功率转换效率的器件。我们将金属纳米粒子(MNPs)插入到有源层中,并利用时域有限差分(FDTD)方法研究了器件结构。采用该模型后,吸收系数和PCF均有较大提高。
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引用次数: 2
Sensor system for linear defect tracking by using cone-shaped laser beam 锥形激光束线性缺陷跟踪传感器系统
Hyuk-Hoon Shim, S. Cho, Chun-Sam Song, Jong-Hyeong Kim
A sensor system that measures the 3D data of the object after projecting the cone shaped beam to the object of measurement to create a round mark and receiving this image through camera, was studied. This sensor system, when attached to a robot, will enable diverse application works, and in this study, such was proved by displaying the tracking work for the defect fabricated randomly.
研究了一种测量物体三维数据的传感器系统,该系统将锥形光束投射到被测物体上形成圆形标记,并通过相机接收该图像。该传感器系统安装在机器人上后,可以实现多种应用工作,在本研究中,通过显示随机制造缺陷的跟踪工作来证明这一点。
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引用次数: 0
Shape measurement by light-stepping method using LEDs 利用led光步进法测量形状
Y. Morimoto, M. Fujigaki, A. Masaya, Y. Oura
A new shape measurement method using whole-space tabulation method and light-stepping method is proposed. A grating projector using five LED line light sources is also proposed for the light-stepping method. It will be a very fast, low-cost and accurate measurement system. The theory and experiment are introduced.
提出了一种基于全空间制表法和光步进法的形状测量新方法。提出了一种采用5个LED线光源的光栅投影仪,用于光步进法。这将是一个非常快速、低成本和准确的测量系统。介绍了该方法的原理和实验。
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引用次数: 3
Object recognition based on relationship between camera vibration and measurement error on stereo measurement 基于摄像机振动与测量误差关系的立体测量目标识别
S. Okazaki, Takayuki Tanaka, S. Kaneko, H. Takauji
This study aims to establish an error model of the stereo measurement system considering camera vibration. At first, we verified the distribution of disparity error under the circumstance without the camera vibration and with the camera vibration. As the result, we found that we can approximate the distribution of disparity error by normal distribution under the circumstance without camera vibration and with camera vibration. And, the parameters of normal distribution are changed by the camera vibration. The parameters of the distribution of the measurement error are average μ and standard deviation σ. The parameters of the camera vibration are considered amplitude A and frequency F. In order to verify relationships during the parameters of the distribution of measurement error and the parameters of the camera vibration, we experimented using the vibration testing system. We imposed simple harmonic motion to the stereo camera. In this paper, we use stereo camera Bumblebee. As the result of experiment, the camera vibration didn't affect average μ. We found positively correlation between standard deviation σ and amplitude A. And, we found negatively correlation between standard deviation σ and frequency F. We estimate the parameters of measurement error by the parameter of the camera vibration using these relationships. So, we establish the error model of the stereo measurement system. Moreover, we define existing probability of object using the parameter of measurement error.
本研究旨在建立考虑摄像机振动的立体测量系统误差模型。首先验证了摄像机无振动和有振动情况下视差误差的分布。结果表明,在无摄像机振动和有摄像机振动两种情况下,视差误差的分布都可以近似为正态分布。摄像机振动会改变正态分布参数。测量误差的分布参数为平均值μ和标准差σ。摄像机振动参数分别考虑幅值A和频率f。为了验证测量误差分布过程中参数与摄像机振动参数之间的关系,我们利用振动测试系统进行了实验。我们把简谐运动加到立体摄像机上。在本文中,我们使用立体摄像机大黄蜂。实验结果表明,相机振动对平均μ值没有影响。我们发现标准差σ与振幅a呈正相关,标准差σ与频率f呈负相关。我们利用这些关系通过相机振动参数估计测量误差的参数。为此,建立了立体测量系统的误差模型。此外,利用测量误差参数定义了目标的存在概率。
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引用次数: 1
Improving performance of task space controllers using an inner PD joint controller: an application to visual sevoing 使用内部PD联合控制器改进任务空间控制器的性能:视觉分割的应用
Rubén Garrido, E. Canul, A. Soria
This paper presents a comparative study of two task space control approaches. The first approach, similar to most of task space controllers, makes use of an inner velocity loop. The second proposed approach employs an inner proportional derivative (PD) joint position-velocity loop. A stability proof for the second apprach is provided together with experiments using a visual servoed robot. It is shown that the proposed control law needs less gain at the task space level then precluding amplification of the measurement noise; moreover, it is shown that the first approach produces uncontrolled movements when the task space sensor fails whereas the proposed controller avoids uncontrolled behavior
本文对两种任务空间控制方法进行了比较研究。第一种方法与大多数任务空间控制器类似,利用内部速度循环。第二种方法采用内比例导数(PD)关节位置-速度环。给出了第二种方法的稳定性证明,并利用视觉伺服机器人进行了实验。结果表明,所提出的控制律在任务空间级所需的增益比排除测量噪声放大所需的增益要小;此外,当任务空间传感器失效时,第一种方法会产生不受控制的运动,而所提出的控制器则避免了不受控制的行为
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引用次数: 0
A complete manipulation platform for characterization of micro-components 一个完整的操作平台,表征微组件
C. Canales, F. Cosandier, G. Boetsch, V. Chatagny, J. Lee, G. Bringout, R. Clavel
This paper presents a complete manipulation platform for characterization of micro-components that is being developed in the scope of the European project GOLEM. Various tools such as electrical probes and force sensors have been designed and integrated on both high precision mobile micro-robots and fixed manipulators in order to interact with micro-objects. The platform enables the user to characterize parts with sizes ranging from sub-micrometer up to the millimeter. Forces ranging from 1 mN up to 120 mN can be measured as well as electrical resistivity of microcomponents. As the characterization platform is aimed to be used by material scientists and biologists, the manipulation is "assisted" so that the user focuses on the application and not on the robotic systems. One of the key features is that the control software will automatically bring the end-effectors of the manipulators in the local (microscope) field of view. The platform is composed of an XY stage mounted on an inverted optical microscope, of manipulators (fixed and mobile) and of various sensors (optical, force and electrical).
本文提出了一个完整的操作平台,用于表征在欧洲项目GOLEM范围内正在开发的微组件。在高精度移动微型机器人和固定式机械手上设计和集成了各种工具,如电探针和力传感器,以便与微物体进行交互。该平台使用户能够表征零件的尺寸范围从亚微米到毫米。可以测量从1 mN到120 mN的力以及微元件的电阻率。由于表征平台的目标是供材料科学家和生物学家使用,因此操作是“辅助的”,因此用户将重点放在应用程序上,而不是机器人系统上。其中一个关键特点是控制软件将机械手末端执行器自动置于局部(显微镜)视场。该平台由安装在倒置光学显微镜上的XY平台、操纵器(固定和移动)和各种传感器(光学、力和电)组成。
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引用次数: 1
3D shape measurement in occluded environments based on stereo PMP algorithm 基于立体PMP算法的闭塞环境三维形状测量
Hyunki Lee, D. Hong, Hyungsuck Cho
Nowadays, a number of 3D measurement methods have been developed such as stereo vision, laser structured light and PMP (Phase Measuring Profilometry) method. However, they have its own limitations : 2π ambiguity, correspondence problem, long estimation time. To solve these problems, in our previous researches [9,13], we introduced a novel sensing method adopting stereo vision and PMP technique (stereo PMP algorithm). One other difficult problem is occlusion problem needed to tackle by the stereo PMP algorithm which uses the principle of stereo vision and two cameras. The occlusion problem cannot be solved by using the principle of typical stereo vision, because there is no correspondence point in occlusion area. In our previous research based on stereo PMP algorithm, however, phase information related to the projector's position is additionally used which gives more additional information. By using this additional information, we can solve the occlusion problem effectively. In order to detect occlusion area, we adopt the principle of Dynamic Programming, while to measure the depth the principle of typical PMP algorithm and the geometrical relationship of detected depth area. To verify the efficiency of the proposed method, a series of experimental tests were performed.
目前,立体视觉、激光结构光、相位测量轮廓法等三维测量方法已经发展起来。然而,它们也有自己的局限性:2π模糊性、对应性问题、估计时间长。为了解决这些问题,在我们之前的研究[9,13]中,我们引入了一种采用立体视觉和PMP技术(立体PMP算法)的新型传感方法。利用立体视觉原理和双摄像头的立体PMP算法需要解决的另一个难题是遮挡问题。由于遮挡区域内没有对应点,使用典型立体视觉原理无法解决遮挡问题。然而,在我们之前基于立体PMP算法的研究中,额外使用了与投影机位置相关的相位信息,从而提供了更多的附加信息。通过使用这些附加信息,我们可以有效地解决遮挡问题。遮挡区域检测采用动态规划原理,深度测量采用典型PMP算法原理和检测深度区域的几何关系。为了验证该方法的有效性,进行了一系列的实验测试。
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引用次数: 0
期刊
Optomechatronic Technologies (ISOT), 2010 International Symposium on : 25-27 Oct. 2010 : [Toronto, ON]. International Symposium on Optomechatronic Technologies (2010 : Toronto, Ont.)
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