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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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Sinusoidal fringe-pattern projection for 3-D surface measurement with variable illuminance 变照度下三维曲面测量的正弦条纹投影
C. Waddington, J. Kofman
This paper presents a method of projecting sinusoidal fringe patterns with modified maximum gray level to accommodate variable ambient illuminance that would otherwise cause intensity saturation and measurement error in phase-shifting surface-shape measurement. The maximum input gray level (MIGL) in the projected patterns can be reduced to an optimal trade-off point, below which the image intensity signal-to-noise ratio would diminish the advantage of further MIGL reduction. Measurement simulations using ten MIGLs (75 to 255) demonstrated reduction in RMS errors for ambient illuminance of 600, 700, 800 and 900 lx, from 0.31, 0.45, 0.75 and 1.21 mm, respectively, to 0.2 mm. The advantage of the approach was confirmed in real measurements of a flat plate and human mask.
本文提出了一种投影正弦条纹图案的方法与修改的最大灰度级,以适应可变的环境照度,否则会导致强度饱和和测量误差相移表面形状的测量。投影模式中的最大输入灰度(MIGL)可以降低到最佳权衡点,低于此值的图像强度信噪比将降低进一步降低MIGL的优势。使用10个migl(75至255)的测量模拟表明,环境照度为600、700、800和900 lx时,RMS误差分别从0.31、0.45、0.75和1.21 mm降低到0.2 mm。该方法的优点在平板和人体面罩的实际测量中得到了证实。
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引用次数: 14
Development of a polymer based fiberoptic magnetostrictive metal detector system. 聚合物基光纤磁致伸缩金属探测器系统的研制。
Wei Shu Hua, Joshua Rosenberg Hooks, Wen Jong Wu, Wei Chih Wang

This paper presents a new metal detector using a fiberoptic magnetostriction sensor. The metal sensor uses a fiber-optic Mach-Zehnder interferometer with a newly developed ferromagnetic polymer as the magnetostrictive sensing material. This polymeric magnetostrictive fiberoptic metal sensor is simple to fabricate, small in size, and resistant to RF interference (which is common in typical electromagnetic type metal detectors). Metal detection is based on disruption of the magnetic flux density across the magnetostriction sensor. In this paper, characteristics of the material being sensed and magnetic properties of the ferromagnetic polymers will be discussed.

本文介绍了一种新型的光纤磁致伸缩传感器金属探测器。金属传感器采用光纤马赫-曾德尔干涉仪,采用新研制的铁磁聚合物作为磁致伸缩传感材料。这种聚合物磁致伸缩光纤金属传感器制造简单,体积小,抗射频干扰(这在典型的电磁型金属探测器中很常见)。金属探测是基于磁致伸缩传感器上的磁通密度的破坏。本文将讨论被测材料的特性和铁磁性聚合物的磁性。
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引用次数: 8
Mechanical sensitivity enhancement of silicon based photonic crystal micro-pressure sensor 硅基光子晶体微压力传感器的机械灵敏度增强
A. Bakhtazad, J. Sabarinathan, J. Hutter
We describe here a sensor consisting of a line defect photonic crystal waveguide suspended over a silicon substrate. Under applied pressure, the photonic crystal waveguide is deflected toward the substrate, causing a decrease in optical transmission due to the coupling of the waveguide field to the silicon substrate. Bridge engineering can increase the mechanical sensitivity of the bridge: maintaining constant bridge footage, we are able to increase sensitivity by about 5.5 times.
本文描述了一种由悬浮在硅衬底上的线缺陷光子晶体波导组成的传感器。在施加压力下,光子晶体波导向衬底偏转,由于波导场与硅衬底的耦合,导致光传输减少。桥梁工程可以提高桥梁的机械灵敏度:保持桥梁进尺不变,我们可以提高灵敏度约5.5倍。
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引用次数: 11
Diamagnetically levitating motor with improved optical feedback reference tracking 采用改进光学反馈参考跟踪的抗磁悬浮电机
Shrey Khanna, Wei Chih Wang, J. Ho
This paper describes the conceptual principle, operation and control of a low friction, low maintenance pow er delivering motor using a diamagnetically stabilized levitating rotor. The planar rotor described in this paper rotates due to nine electromagnets evenly spaced around the rotor. An optical encoder feedback system is designed and fabricated that controls the frequency of the levitating rotor. An improved driving circuit allows current to flow through one phase at a time, which produces a magnetic field strong enough to spin the rotor. Experiments suggest that the optical encoder feedback control system can do reference tracking on the levitating rotor system. The designed control algorithm can drive the rotor to specified reference frequencies up to 1.3 Hz using the optical encoder measurements. An improved control algorithm and an actuator system with higher switching speed are implemented to observe faster system response.
本文介绍了一种采用抗磁稳定悬浮转子的低摩擦、低维护供电电机的原理、工作原理和控制方法。本文所描述的平面转子是由于转子周围均匀分布的9个电磁铁而旋转的。设计并制作了一种控制悬浮转子频率的光学编码器反馈系统。一种改进的驱动电路允许电流一次流过一个相位,从而产生足够强大的磁场来旋转转子。实验表明,该光学编码器反馈控制系统可以对悬浮转子系统进行参考跟踪。所设计的控制算法可以利用光学编码器的测量值将转子驱动到指定的参考频率,最高可达1.3 Hz。为了观察到更快的系统响应,采用了改进的控制算法和更高切换速度的致动器系统。
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引用次数: 3
Coordinate measurement of micro groove on MEMS device by optically controlled microprobe 光控微探头在MEMS器件上的微槽坐标测量
M. Kobayashi, M. Michihata, T. Hayashi, Y. Takaya
Recently, ultra-high accuracy coordinate measuring m achine (Nano-CMM) is demanded for inspecting 3D shapes of micro components. The most important element to achieve the Nano-CMM is the probe for sensing surfaces of 3D components. In this study, laser trapping probe, which is the micro-sphere trapped in air by optical radiation pressures, is proposed as a novel probe. In this paper, micro-groove structure on micro electromechanical system (MEMS) device is measured by using laser trapping probe with circular motion, which is improved to have same sensing property by use of the element of radial polarization. The probe has a diameter of 8 μm while conventional micro probes have a diameter of several tens of μm. The small probe makes it possible to measure narrow space of 50 μm. Moreover, the probe enables to measure specimen regardless of the approaching direction. This shows the potential that laser trapping probe enables to measure any micro structure with same manner. Although there are some conjectures to resolve, it seems that the laser trapping probe is validity as a probe for Nano-CMM.
近年来,人们对高精度坐标测量机(Nano-CMM)提出了极高的要求,以检测微部件的三维形状。实现纳米三坐标测量机的最重要的元件是用于检测三维部件表面的探头。本文提出了一种新型探针——激光俘获探针,即利用光辐射压力将微球捕获在空气中。本文采用圆形运动的激光俘获探头对微机电系统(MEMS)器件上的微沟槽结构进行了测量,并利用径向偏振元件对其进行了改进,使其具有相同的传感性能。该探头的直径为8 μm,而传统的微探头的直径为几十μm。探头尺寸小,可以测量50 μm的狭窄空间。此外,无论接近方向如何,探头都可以测量样品。这显示了激光捕获探针能够以同样的方式测量任何微观结构的潜力。虽然有一些猜想有待解决,但似乎激光俘获探头作为纳米三坐标测量机的探头是有效的。
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引用次数: 2
A real-time stereo vision sensor based on FPGA realization of orientation code matching 一种基于FPGA的实时立体视觉传感器方向码匹配实现
I. Ohmura, Tomoyuki Mitamura, Hedenori Takauji, S. Kaneko
This paper describes a real-time stereo vision sensor based on the Field Programmable Gate Array (FPGA). It was developed using an image matching algorithm called Orientation Code Matching (OCM). Our implementation, using OCM, provides not only high performance, but also flexibility and a greater robustness, all of which are necessary to embed vision sensors in mobile robots and vehicles. The prototype sensor we implemented runs stereo matching with images of 752 by 480 pixels via image sensing chips, at a frame rate of 60 fps. The maximum disparity, using the current design, is 127 pixels at an operating frequency of 53MHz on the FPGA. By changing the parameters of the hardware description, the architecture of our design on the FPGA becomes flexible and expandable to the required size of input images and pixel disparity.
介绍了一种基于现场可编程门阵列(FPGA)的实时立体视觉传感器。它是使用一种称为方向码匹配(OCM)的图像匹配算法开发的。我们使用OCM的实现不仅提供高性能,而且还提供灵活性和更强的鲁棒性,所有这些都是在移动机器人和车辆中嵌入视觉传感器所必需的。我们实现的原型传感器通过图像传感芯片对752 × 480像素的图像进行立体匹配,帧速率为60 fps。使用当前设计,最大视差在FPGA上的工作频率为53MHz时为127像素。通过改变硬件描述的参数,我们的设计在FPGA上的架构变得灵活和可扩展到所需的输入图像大小和像素差距。
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引用次数: 8
Light driven motor using shape memory alloy 采用形状记忆合金的光驱动电机
H. Okamura
A light-driven motor driven by a single source of light is demonstrated for the first time. The system utilizes a NiTi shape memory alloy (SMA) wire initially trained straight shape. The SMA wire was formed in a loop and put around two wheels. The wire undergoes change in the radius of curvature as it rotates, and when light is irradiated at the point where the wire is leaving the wheel, it undergoes phase transition and straighten: causing a rotating force to the wheel. In the experiment a rotational speed of 135 to 140 rpm was observed at the smaller wheel for a single loop of 0.3 mm-diameter SMA wire.
首次演示了单光源驱动的光驱动电机。该系统采用NiTi形状记忆合金(SMA)线材,初始训练为直线形状。SMA钢丝形成一个环,并放在两个轮子周围。导线在旋转时曲率半径发生变化,当光线照射到导线离开车轮的点时,导线发生相变并变直:对车轮产生旋转力。在实验中,对于直径0.3 mm的SMA丝单环,在较小的车轮上观察到135 ~ 140 rpm的转速。
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引用次数: 1
A patterned illumination and phase integration imaging method for high-glossy surface evaluation 一种用于高光泽表面评价的图形化照明和相位积分成像方法
Y. Roh, Seonghoon Kim, Heungbo Shim, DaeCheol Lim, DaeHwa Jeong
Visual and optical measurement and evaluation technologies are highly required in quality control of painting and final coating process. We propose a novel approach to evaluate the appearance quality of high glossy surface object. To image the surface roughness, by which the object looks like orange peel, we employ a patterned illumination with phase shifting. The object can be exposed to various illumination conditions according to the phase of pattern lighting. By ac hieving a series of images and analyzing the phase, an image can be synthesized as specific phase selectively. The grade of su rface quality in terms of orange peel is then evaluated based on a specific phase. We have conducted evaluation tests on sample pr oducts, which show the usability of the proposed method.
在涂装和最终涂装过程的质量控制中,对视觉和光学测量与评价技术有很高的要求。提出了一种评价高光泽表面物体外观质量的新方法。为了对表面粗糙度进行成像,物体看起来像橘子皮,我们采用了相移的图案照明。物体可以根据图案照明的相位暴露在各种照明条件下。通过获取一系列图像并对其相位进行分析,可以选择性地合成出特定相位的图像。然后根据特定的阶段评估橙皮的表面质量等级。我们对样品产品进行了评估测试,结果表明所提出方法的可用性。
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引用次数: 0
All-optical switching using microring resonators including Quantum-Dots 全光开关使用微环谐振器,包括量子点
A. Rostami, H. Baghban, A. Khalafi, H. Rasooli, A. Ghanbari, F. Janabi-Sharifi
In this article a Quantum Dots based method is proposed to enhance the nonlinear switching properties of a bulk GaAs/AlGaAs microring resonator. Switching is accomplished in the pump and probe configuration. Refractive index changes in the microring due to free carriers generated by two photon absorption are used to switch the probe beam in and out of resonance. It has been concluded that quantum dot doping would lead to higher nonlinearity and faster evolution in refractive index variation. A control pulse is applied to the structure to control the carrier lifetime and therefore manage the switching time.
本文提出了一种基于量子点的方法来提高块体GaAs/AlGaAs微环谐振器的非线性开关特性。切换在泵和探头配置中完成。利用双光子吸收产生的自由载流子在微环中的折射率变化来切换探针光束的共振。结果表明,量子点掺杂会导致折射率变化的非线性提高和演化速度加快。控制脉冲应用于该结构以控制载波寿命,从而管理切换时间。
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引用次数: 1
Tutorial A: Sensor data fusion, principles and applications A:传感器数据融合,原理和应用
B. Moshiri
Sensor Data Fusion deals with the synergistic combination of data made available by various sources such as sensors in order to provide a better understanding of a given scene. The use of sensor/data fusion concept has advantages such as “Redundancy”, “Complementary”, “Timeliness” and “Less Costly Information”. The following issues will be presented in this tutorial: • Background• Sensor/Data fusion overview • Definition & Formulation • Fusion: A Fission inversion model • Fusion characterization: ○ Application domain ○ Fusion objective ○ Fusion process input/output characteristics ○ Sensor suite configuration • Different Techniques of Sensor fusion ○ Conventional Approaches ○ Knowledge based Systems/Intelligent Approaches • Different Level Fusion Architectures • Different Fusion Model Architectures • Integration of Mechatronics & Sensor Data Fusion • Some typical applications of Sensor Data Fusion in Robotics & Mechatronics.
传感器数据融合处理各种来源(如传感器)提供的数据的协同组合,以便更好地理解给定场景。采用传感器/数据融合概念具有“冗余”、“互补”、“及时性”和“信息成本更低”等优点。以下问题将在本教程中提出:•背景•传感器/数据融合概述•定义与公式•融合:裂变反转模型•融合表征:〇应用领域〇融合目标〇融合过程输入/输出特性〇传感器组件配置•传感器融合的不同技术〇传统方法〇基于知识的系统/智能方法•不同层次的融合架构•不同的融合模型架构•机电一体化与传感器数据融合的集成•传感器数据融合在机器人与机电一体化中的一些典型应用。
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引用次数: 3
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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