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    • 32. 发明授权
    • Self-calibrating, multi-camera machine vision measuring system
    • 自校准,多相机机器视觉测量系统
    • US06959253B2
    • 2005-10-25
    • US10387575
    • 2003-03-14
    • David A. JacksonMichael J. RobbDonald L. Walchuk
    • David A. JacksonMichael J. RobbDonald L. Walchuk
    • G01B11/00G01B11/275G01B21/00G01C11/06G01C25/00G01S5/16G06F19/00
    • G01S5/163G01B11/2755G01B2210/12G01B2210/143G01B2210/30G01B2210/303G01C11/06G01C25/00
    • An apparatus and method for calibrating machine vision measuring systems that have more than one camera are disclosed. A first calibration target is mounted in a fixed relationship to a first camera of the machine vision measuring system. A third camera mounted in a fixed relationship to a second camera of the machine vision measuring system. Second and third calibration targets are mounted in a fixed relationship to one another and viewable by the first camera and by the third camera. A data processor is programmed to compute calibration of the first camera and the second camera, based on a position of the second calibration target relative to the third calibration target and based on a position of the first camera with respect to the third camera. The apparatus and method provide a way to continuously measure the positions of two or more cameras used in the measuring system, and to use such measurements to calibrate the system. If the cameras move with respect to each other, their respective positions are calculated and used in subsequent measurements. The apparatus and method enable a machine vision measuring system to be used without field calibration at the time of installation.
    • 公开了一种用于校准具有多于一个照相机的机器视觉测量系统的装置和方法。 第一校准目标以与机器视觉测量系统的第一相机固定的关系安装。 与机器视觉测量系统的第二相机固定的第三相机。 第二和第三校准目标以彼此固定的关系安装并且可由第一相机和第三相机观看。 数据处理器被编程为基于第二校准目标相对于第三校准目标的位置并且基于第一相机相对于第三相机的位置来计算第一相机和第二相机的校准。 该装置和方法提供了连续地测量在测量系统中使用的两个或更多相机的位置的方法,并且使用这种测量来校准系统。 如果摄像机相对于彼此移动,则它们各自的位置被计算并用于随后的测量。 该装置和方法使得机器视觉测量系统在安装时不进行现场校准而被使用。
    • 33. 发明授权
    • Self-calibrating position determination system
    • 自校准位置确定系统
    • US06839972B2
    • 2005-01-11
    • US10170401
    • 2002-06-14
    • David A. JacksonBrian M. BlivenPatrick B. O'Mahony
    • David A. JacksonBrian M. BlivenPatrick B. O'Mahony
    • G01B11/00G01B11/275G01C11/06H04N13/00
    • G01B11/2755G01B11/002G01C11/06H04N13/239H04N13/243H04N13/246H04N2013/0081
    • A position determination system comprises a first measuring apparatus and a second measuring apparatus. The first measuring apparatus includes a first sensing device having a sensing field for obtaining positional data of a first testing target, a calibration target rigidly linked to the first sensing device, wherein the positional relationship between the first sensing device and the calibration target is known. The system has a repositioning mechanism for repositioning the sensing field of the first sensing device. The second measuring apparatus includes a second sensing device having a sensing field for obtaining positional data of a second testing target, a calibration sensing device rigidly linked to the second sensing device for obtaining positional data of the calibration target, wherein the positional relationship between the second sensing device and the calibration sensing device is known, and a repositioning mechanism for repositioning the sensing field of the second sensing device. Depending on different needs, the repositioning mechanism readjust the viewing fields of the sensing devices such that the testing targets are properly within the sensing fields of the sensing devices.
    • 位置确定系统包括第一测量装置和第二测量装置。 第一测量装置包括具有用于获得第一测试目标的位置数据的感测场的第一感测装置,与第一感测装置刚性连接的校准目标,其中第一感测装置与校准目标之间的位置关系是已知的。 该系统具有用于重新定位第一感测装置的感测场的重新定位机构。 第二测量装置包括具有用于获得第二测试目标的位置数据的感测场的第二感测装置,刚性地链接到第二感测装置的校准感测装置,用于获得校准目标的位置数据,其中第二测量装置 感测装置和校准感测装置是已知的,以及用于重新定位第二感测装置的感测场的重新定位机构。 根据不同的需要,重新定位机构重新调整感测装置的观察区域,使得测试目标适当地在感测装置的感测场内。
    • 34. 发明授权
    • Multi-component material for uncooled thermal imaging and graphical method for the determination thereof
    • 用于非冷却热成像的多组分材料和用于确定其的图形方法
    • US06534429B1
    • 2003-03-18
    • US09528956
    • 2000-03-20
    • David A. Jackson
    • David A. Jackson
    • C04B35474
    • C23C14/088C04B35/462C04B35/4684C04B35/47C04B2235/3213C04B2235/3215C04B2235/3284C04B2235/3296H01L37/025
    • A multi-component material is represented by the general formula (I): Ba(1−y−y)PbyMxTiO3  (I) in which: M is Sr or Cd; x is the decimal fraction molar concentration of MTiO3, where x has a value equal to or greater than about 0.20 and less than or equal to about 0.75; and y is the decimal fraction molar concentration of PbTiO3, where y has a value greater than zero and less than or equal to about 0.40, and x+y is less than 1.0. In addition, a method of graphically estimating the composition of the multi-component material represented by the general formula (I) is disclosed herein. In a preferred embodiment, x has a value between about 0.28 and 0.66, and y has value greater than zero and less than or equal to about 0.34, while said material has a Curie point temperature of about 25° C. or room temperature. These room temperature Curie point materials are useful in uncooled thermal imaging applications.
    • 多组分材料由通式(I)表示:其中:M是Sr或Cd; x是MTiO 3的小数摩尔浓度,其中x具有等于或大于约0.20并且小于或等于或大于或等于 等于约0.75; andy是PbTiO3的小数分数摩尔浓度,其中y具有大于零且小于或等于约0.40的值,x + y小于1.0。 此外,公开了以通式(I)表示的多组分材料的组成的图形估计方法。 在优选的实施方案中,x具有约0.28至0.66之间的值,并且y具有大于零且小于或等于约0.34的值,而所述材料的居里点温度为约25℃或室温。 这些室温居里点材料可用于非冷却热成像应用。
    • 35. 发明授权
    • Apparatus and method for rapidly rotating containers to produce
multi-aspect designs
    • 用于快速旋转容器以产生多方面设计的装置和方法
    • US5553643A
    • 1996-09-10
    • US387025
    • 1995-02-10
    • Adolph E. GoldfarbDavid A. JacksonMartin I. GoldfarbFred D. EddinsLinwood E. Doane Jr.
    • Adolph E. GoldfarbDavid A. JacksonMartin I. GoldfarbFred D. EddinsLinwood E. Doane Jr.
    • A63H33/22B44D3/00B65B1/14
    • A63H33/22B44D3/00
    • Apparatus and method for rapidly rotating a small enclosed transparent container and introducing a plurality of visually different materials into the rotating container to produce distinctive multi-aspect designs. The illustrated apparatus includes a support for releasibly holding one of the containers at a time for rotation about an axis, and a drive mechanism for causing the held container to rotate rapidly about that axis. The container has an entrance and the apparatus includes dispensers for selectively and sequentially introducing two or more of the visually different materials in flowable form into the entrance while the container is rotating. The materials have the capacity for maintaining themselves generally separate from the other materials in the rotating container. By way of example, the materials could be sands or gels of different colors or appearances. There may be a plurality of containers with a variety of different shapes. After a container is filled, it may be removed from the support, its entrance closed, and then used as jewelry for display, for play, etc.
    • 用于快速旋转小的封闭透明容器并将多个视觉上不同的材料引入旋转容器中以产生独特的多方面设计的装置和方法。 所示的装置包括一个用于一次可释放地保持容器中的一个以围绕轴线旋转的支撑件,以及用于使保持的容器围绕该轴线快速旋转的驱动机构。 容器具有入口,并且该装置包括分配器,用于当容器旋转时,选择性地且顺序地将两种或更多种可流动形式的视觉上不同的材料引入入口。 这些材料具有维持它们大体上与旋转容器中的其它材料分离的能力。 作为示例,材料可以是不同颜色或外观的沙子或凝胶。 可以存在多种具有各种不同形状的容器。 容器充满后,可将其从支架上取下,其入口关闭,然后用作展示珠宝,玩耍等。
    • 38. 发明授权
    • Vortex shedding flowmeter
    • 涡流流量计
    • US4706502A
    • 1987-11-17
    • US841527
    • 1986-02-27
    • Julian D. C. JonesDavid A. JacksonPedram A. Leilabady
    • Julian D. C. JonesDavid A. JacksonPedram A. Leilabady
    • G01F1/32
    • G01F1/3245
    • A flowmeter for measuring the velocity of fluid flow by monitoring the vortex shedding frequency of the fluid flow comprises a single mode optical fibre sensing element (1) for detecting vortex shedding and utilizes interferometric techniques for producing an electrical output signal corresponding to the vortex shedding frequency. The sensing element (1) comprises at least part of the signal arm (2) of an interferometer (3) which also includes means (12) for deriving a reference signal from the illuminating light source (4). The flow induced oscillation of the sensing element (1) caused by vortex shedding produces modulations of the interferometer output which is monitored by a photodetector (14) which, in turn, produces a modulated electrical output signal which can be processed by a signal processing system (16-19) to identify the vortex shedding frequency and, hence, produce a measurement of the flow velocity.
    • PCT No.PCT / GB85 / 00302 Sec。 371日期1986年2月27日 102(e)日期1986年2月27日PCT提交1985年7月5日PCT公布。 出版物WO86 / 00698 日本1986年1月30日。用于通过监测流体流动的涡流脱落频率来测量流体流速的流量计包括用于检测涡流脱落的单模光纤传感元件(1),并利用干涉技术产生电输出 信号对应于涡流脱落频率。 感测元件(1)包括干涉仪(3)的信号臂(2)的至少一部分,其还包括用于从照明光源(4)导出参考信号的装置(12)。 由涡旋脱落引起的感测元件(1)的流动引起的振荡产生由光电检测器(14)监测的干涉仪输出的调制,光电检测器(14)又产生调制的电输出信号,该信号可由信号处理系统 (16-19)来识别涡流脱落频率,从而产生流速的测量。