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    • 3. 发明授权
    • Gravity sensing instrument
    • 重力传感仪器
    • US08359920B2
    • 2013-01-29
    • US12759095
    • 2010-04-13
    • Thomas J. Meyer
    • Thomas J. Meyer
    • G01V7/00
    • G01V7/16
    • An instrument for determining the second and/or third-order components of the gravity tensor includes a group of six accelerometers arranged at an equal radius from a spin axis and positioned at 60 degree intervals about the spin axis with the sensing axis of each accelerometer aligned tangentially to the circle subscribed by the accelerometers as they rotate about the spin axis. A gyro-stabilized platform maintains the accelerometer arrangement at a preferred alignment relative to the local gravity vector. As the accelerometers orbit about the spin axis, each accelerometer outputs a sinusoidal signal that is offset by 60 degrees from its immediately adjacent leading and trailing accelerometers with the outputs thereof processed to provide the second-order component and the third-order tensor component. In another arrangement, a group of eight accelerometers arranged at an equal radius from a spin axis and positioned at 45 degree intervals about the spin axis can provide second, third, and fourth-order tensor components. The higher-order tensor components are of use in “de-cluttering” the lower-order tensor components.
    • 用于确定重力张量的第二和/或三阶分量的仪器包括一组六个加速度计,它们以与旋转轴相等的半径布置并且围绕旋转轴以60度的间隔布置,每个加速度计的感测轴对准 当加速度计绕旋转轴线旋转时,与加速度计订购的圆切线。 陀螺稳定平台相对于局部重力矢量将加速度计排列保持在优选的对准。 随着加速度计围绕自旋轴的轨道,每个加速度计输出一个正弦信号,该正弦信号与其紧邻的前和后加速度计偏移60度,其输出被处理以提供二阶分量和三阶张量分量。 在另一种布置中,以旋转轴相等半径排列并围绕旋转轴定位成45度间隔的一组八个加速度计可以提供第二,三和四阶张量分量。 高阶张量分量可用于去除低阶张量分量。
    • 4. 发明申请
    • Database For Efficient Storage of Track Geometry and Feature Locations
    • 数据库用于轨道几何和特征位置的高效存储
    • US20100235020A1
    • 2010-09-16
    • US12402706
    • 2009-03-12
    • Thomas J. MeyerCharles W. Morris
    • Thomas J. MeyerCharles W. Morris
    • G05D1/00G06F17/30
    • G06F17/30241
    • A database schema is disclosed that can significantly reduce the quantity of data required to describe the geometry of a train track and the geo-locations of features (e.g., grade crossings, mileposts, signals, platforms, switches, spurs, etc.) along the track. In accordance with the illustrative embodiment, a railroad track is represented as a plurality of partitions, each of which has its geometry contained within unique track point elements. Multiple track partitions are then joined together by common track point elements at their boundaries to create continuous rail networks. A compact table schema is employed that enables continuous sections of three-dimensional track splines to be rendered accurately in the track database, irrespective of the location of vertical and horizontal curvature along track segments. The data representation scheme also enables efficient storage of the geo-locations of features along a track, as well as the direct reconstitution of accurate three-dimensional track splines.
    • 公开了一种数据库模式,其可以显着地减少描述列车轨道的几何形状所需的数据量以及沿着该轨迹的特征(例如,等级交叉路口,里程碑,信号,平台,交换机,马刺等)的地理位置 跟踪。 根据说明性实施例,铁路轨道被表示为多个分区,每个分区具有包含在唯一轨迹点元素内的几何分区。 然后,多个轨道分区通过其边界处的公共轨迹点元件连接在一起,以创建连续的轨道网络。 使用紧凑的表格模式,使得能够在轨道数据库中准确地呈现三维轨道样条的连续部分,而不管沿着轨道段的垂直和水平曲率的位置。 数据表示方案还能够沿着轨道有效地存储特征的地理位置,以及直接重构精确的三维轨道样条。
    • 5. 发明授权
    • Train navigator with integral constrained GPS solution and track database compensation
    • 具有整体约束GPS解决方案和跟踪数据库补偿的火车导航仪
    • US07610152B2
    • 2009-10-27
    • US11416069
    • 2006-05-03
    • Thomas J. Meyer
    • Thomas J. Meyer
    • G01C21/00
    • G01C21/00B61L25/025B61L2205/04
    • The present invention provides a new set of algorithmic solutions to accommodate track inaccuracy information in track databases. Navigation and measurement aiding processes are defined by a stochastic mode relative to a moving rail frame defined so that it is aligned with the heading of the compensated track database at the current along track-position. Filtering generates long and short wavelength track alignment disturbances commensurate with track grade to compensate for track database errors; a stochastic error model is defined as the difference between the deterministic implementation and the actual stochastic processes Bayesian estimation of the error variables is implemented via a digital Kalman filter with the navigation, database, and measurement errors removed by subtracting the filter estimates.
    • 本发明提供了一组新的算法解决方案,以适应轨道数据库中的跟踪不准确信息。 导航和测量辅助过程通过相对于移动轨道框架的随机模式来定义,该移动轨道框架被定义为使得其与当前跟踪位置处的经补偿轨道数据库的航向对准。 滤波产生与轨道等级相称的长短波长轨道对准扰动,以补偿轨迹数据库错误; 随机误差模型被定义为确定性实现与实际随机过程之间的差异。误差变量的贝叶斯估计通过数字卡尔曼滤波器实现,通过减去滤波器估计值,导航,数据库和测量误差消除。
    • 9. 发明授权
    • Nitric oxide sensor
    • 一氧化氮传感器
    • US5603820A
    • 1997-02-18
    • US477620
    • 1995-06-07
    • Tadeusz MalinskiDavid A. WinkJanet YounathanRoyce W. MurrayMelani SullivanThomas J. MeyerDanae D. Christodoulou
    • Tadeusz MalinskiDavid A. WinkJanet YounathanRoyce W. MurrayMelani SullivanThomas J. MeyerDanae D. Christodoulou
    • B01J31/16B01J31/18G01N27/30G01N27/416G01N33/00G01N27/26
    • B01J31/1815B01J31/1658G01N27/4045B01J2531/025B01J2531/842B01J2531/845B01J2531/847
    • An electrode sensor which may be used to specifically and quantitatively measure nitric oxide is provided, as well as a method of preparing and using such an electrode sensor to measure nitric oxide concentration in solution. A nitric oxide (NO) microsensor based on catalytic oxidation of NO comprises a thermally-sharpened carbon fiber with a tip diameter of about 0.5-0.7 .mu.m coated with several layers of p-type semiconducting polymeric porphyrin and cationic exchanger deposited thereon. The microsensor, which can be operated in either the amperometric, voltammetric or coulometric mode utilizing a two or three electrode system, is characterized by a linear response up to about 300 .mu.M, a response time better than 10 msec and a detection limit of about 10 nM. The sensor of the present invention also discriminates against nitrite, the most problematic interferant in NO measurements. The amount of NO released from a single cell can thus be selectively measured in situ by a porphyrinic microsensor of the invention. A larger scale sensor utilizing porphyrin and cationic exchanger deposited on larger fibers or wires, platinum mesh or tin indium oxide layered on glass, can also be employed when measurement of NO concentration in chemical media, tissue or cell culture is desired.
    • 提供了可用于特异性和定量测量一氧化氮的电极传感器,以及制备和使用这种电极传感器来测量溶液中的一氧化氮浓度的方法。 基于NO的催化氧化的一氧化氮(NO)微量传感器包括具有约0.5-0.7μm的尖锐直径的碳纤维,其涂覆有几层p型半导体聚合物卟啉和沉积在其上的阳离子交换剂。 可以使用两个或三个电极系统以电流,伏安或库仑模式操作的微传感器的特征在于线性响应高达约300μM,响应时间优于10msec,检测限为约 10nM。 本发明的传感器还可以区分NO测量中最有问题的干扰物亚硝酸盐。 因此,可以通过本发明的卟啉微传感器原位选择性地测量从单个电池释放的NO的量。 当需要在化学介质,组织或细胞培养物中测量NO浓度时,也可以使用沉积在较大纤维或电线上的卟啉和阳离子交换剂的更大规模的传感器,铂玻璃或层状玻璃上的氧化铟锡。