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    • 2. 发明授权
    • Integrated pulsed propulsion system for microsatellite
    • 用于微卫星的集成脉冲推进系统
    • US6131385A
    • 2000-10-17
    • US912709
    • 1997-08-18
    • David H. Lewis, Jr.Erik K. Antonsson
    • David H. Lewis, Jr.Erik K. Antonsson
    • B64G1/00F02K9/94F02K99/00F03H99/00F15B15/14F03H5/00
    • F02K9/94F15B15/1471
    • A propulsion system and, in particular, a microthruster for a microsatellite. The microthruster may be formed as a resistojet type thruster formed with a chamber, closed by a diaphragm which acts as a blow-out disk. A fluid, such as an inert gas, is disposed within the chamber. Heating of the gas causes the gas pressure to increase until the diaphragm ruptures, which, in turn, causes the gas to flow out of the chamber, acting as a propellant, and providing a small unit force. The microthruster is adapted to be formed by known batch processing methods with 10.sup.4 -10.sup.6 microthrusters per wafer. The unit of force can be easily scaled by varying the number of microthruster 20 used for an application, the geometry of the chamber 22, as well as the type of fluid used within the chamber, to suit the microsatellite application.
    • 推进系统,特别是用于微卫星的微型推进器。 微型推进器可以形成为形成有腔室的再喷射式推进器,该室由作为吹出盘的隔膜封闭。 诸如惰性气体的流体设置在室内。 气体的加热导致气体压力增加,直到膜片破裂,这又导致气体流出室,用作推进剂,并提供小的单位力。 微型推杆适用于通过已知的批量处理方法形成,每个晶片具有104-106个微型推进器。 可以通过改变用于应用的微推力器20的数量,室22的几何形状以及室内使用的流体的类型来适应微卫星应用来容易地缩放力单位。
    • 5. 发明申请
    • Vehicle collision avoidance and warning
    • 车辆碰撞避免和警告
    • US20080183360A1
    • 2008-07-31
    • US11800962
    • 2007-05-07
    • Yizhen ZhangErik K. Antonsson
    • Yizhen ZhangErik K. Antonsson
    • G06F17/11B60W30/08B60Q1/00
    • B60W50/14B60W2050/143B60W2420/52G01S17/58G01S17/936
    • A vehicle warning system to provide a time-based measure, termed the time-to-last-second-braking time, which is a time buffer that is left for the driver, or control system, to react in order to achieve a desired minimum distance buffer during a collision avoidance process. This measure is based upon a velocity of the host vehicle, an acceleration of the host vehicle, a distance to a lead vehicle, a time rate of change of the distance to the lead vehicle, a relative acceleration between the host and lead vehicles, an acceleration of the host vehicle under maximum braking, and the minimum distance buffer. Various levels of warning may be provided, based upon the value of the time-to-last-second-braking time. Other embodiments are described and claimed.
    • 一种车辆警告系统,用于提供基于时间的措施,称为时间到最后的第二制动时间,其为驾驶员或控制系统留下的时间缓冲器,以便实现期望的最小值 碰撞避免过程中的距离缓冲区。 该措施基于本车辆的速度,本车辆的加速度,与前车辆的距离,与前车辆的距离的时间变化率,主机和主车辆之间的相对加速度, 最大制动时主车辆的加速度和最小距离缓冲器。 可以基于时间到最后二次制动时间的值来提供各种警告级别。 描述和要求保护其他实施例。
    • 6. 发明授权
    • Apparatus for measuring three-dimensional surface geometries
    • 用于测量三维表面几何形状的装置
    • US4957369A
    • 1990-09-18
    • US298931
    • 1989-01-23
    • Erik K. Antonsson
    • Erik K. Antonsson
    • G01B11/25
    • G01B11/2545
    • Automatic acquistion and anaylsis for three-dimensional surface geometries is accomplished by use of an opto-electronic technique which exploits large-linear-area lateral-photo-effect-diodes and employs a reflected, tightly focused light spot. The technique consists of one very small light spot pulsed for example at 10,000 Hertz with a 50% duty cycle. The light spot is focused on the surface to be measured and scanned across it stopping for, in one example, 50 microseconds each time it is illuminated. The diode detectors mounted in the focal plane of a pair of cameras, return azimuth and elevation information for each spot. Knowledge of the location and orientation of the cameras, as well as calibration corrections for each camera, completes the information necessary to reconstruct the full three-dimensional location of each reflected light spot.
    • 三维表面几何的自动采集和分析是通过使用利用大线性面积横向光电效应二极管并采用反射的,紧密集中的光斑的光电技术实现的。 该技术由一个非常小的光点组成,例如以10,000赫兹脉冲,占空比为50%。 光斑聚焦在要测量的表面上并在其上扫描,在一个示例中,每次点亮50微秒。 安装在一对相机的焦平面上的二极管检测器,为每个点返回方位角和仰角信息。 知道摄像机的位置和方向,以及每个摄像机的校正校正完成了重建每个反射光点的完整三维位置所需的信息。