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1.发明授权Synchronizing wireless devices using timestamps and relative clock offsets of the wireless devices 有权使用无线设备的时间戳和相对时钟偏移来同步无线设备公开(公告)号：US08406217B2
公开(公告)日：2013-03-26
申请号：US12799087
申请日：2010-04-16
IPC分类号： H04J3/06
CPC分类号： H04W56/009 , H04J3/0667
摘要： Wireless communication may be provided between an access point and one or more wireless devices, such as wireless sensors used in avionics applications for sensing, monitoring and control systems. Synchronization of wireless devices may be required so that certain actions, such as data acquisition, are performed at precisely controlled time instances. The system described herein provides for rapid synchronization of wireless devices that does not require the use of prior timing data and that may be performed without communication directly between the wireless devices. Further, techniques are provided for addressing packet losses and packet propagation delays.
摘要翻译： 可以在接入点和一个或多个无线设备之间提供无线通信，诸如用于感测，监控和控制系统的航空电子应用中使用的无线传感器。 可能需要无线设备的同步，以便在精确控制的时间实例上执行某些动作，例如数据采集。 本文描述的系统提供了无需使用先前的定时数据并且可以在无线设备之间直接进行通信的情况下执行的无线设备的快速同步。 此外，提供了用于寻址分组丢失和分组传播延迟的技术。
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公开(公告)号：US20120263165A1
公开(公告)日：2012-10-18
申请号：US13199817
申请日：2011-09-09
IPC分类号： H04W56/00
CPC分类号： H04W56/009
摘要： Synchronizing a wireless sensor includes receiving a first command at the wireless sensor, noting a first timestamp value indicating when the first reply is sent, responding to the first command with a first reply, receiving a second command at the wireless sensor that contains a second timestamp value indicating when the first reply was received and a third timestamp value indicating when the second command was sent to the wireless sensor, noting a fourth timestamp value indicating when the second command was received by the wireless sensor, and determining an offset at the wireless sensor using the first, second, third, and fourth timestamp values. The presence of the first timestamp value may be interpreted as a request to provide timestamp information for synchronization. An access point may communicate with the wireless sensor.
摘要翻译： 同步无线传感器包括在无线传感器处接收第一命令，注意指示何时发送第一应答的第一时间戳值，响应于具有第一应答的第一命令，在无线传感器处接收包含第二时间戳的第二命令 指示何时接收到第一应答的第一时间戳值，以及指示何时向无线传感器发送第二命令的第三时间戳值，注意到指示无线传感器何时接收到第二命令的第四时间戳值，以及确定无线传感器的偏移量 使用第一，第二，第三和第四时间戳值。 第一时间戳值的存在可被解释为提供用于同步的时间戳信息的请求。 接入点可以与无线传感器通信。
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3.发明授权公开(公告)号：US07505604B2
公开(公告)日：2009-03-17
申请号：US10702070
申请日：2003-11-05
IPC分类号： G06K9/00
CPC分类号： B64D45/0015 , B64D2045/0035 , G06K9/00771 , G06K9/626 , G06K9/629 , G06K9/6293 , G06T7/254 , G08B17/125
摘要： Detecting video phenomena, such as fire in an aircraft cargo bay, includes receiving a plurality of video images from a plurality of sources, compensating the images to provide enhanced images, extracting features from the enhanced images, and combining the features from the plurality of sources to detect the video phenomena. Extracting features may include determining an energy indicator for each of a subset of the plurality of frames. Detecting video phenomena may also include comparing energy indicators for each of the subset of the plurality of frames to a reference frame. The reference frame corresponds to a video frame taken when no fire is present, video frame immediately preceding each of the subset of the plurality of frames, or a video frame immediately preceding a frame that is immediately preceding each of the subset of the plurality of frames. Image-based and non-image based techniques are described herein in connection with fire detection and/or verification and other applications.
摘要翻译： 检测诸如在飞机货舱中的火灾的视频现象包括从多个源接收多个视频图像，补偿图像以提供增强的图像，从增强的图像中提取特征，以及组合来自多个源的特征 检测视频现象。 提取特征可以包括为多个帧的子集中的每一个确定能量指示符。 检测视频现象还可以包括将多个帧的子集中的每一个的能量指示符与参考帧进行比较。 参考帧对应于不存在火焰时所拍摄的视频帧，紧接在多个帧的子集之前的视频帧，或紧邻在多个帧的子集之前的帧之前的视频帧 。 本文结合火灾探测和/或验证和其他应用来描述基于图像和非图像的技术。
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公开(公告)号：US20090016609A1
公开(公告)日：2009-01-15
申请号：US12221244
申请日：2008-07-31
CPC分类号： B64D45/0015 , B64D2045/0035 , G06K9/00771 , G06K9/626 , G06K9/629 , G06K9/6293 , G06T7/254 , G08B17/125
摘要： Detecting video phenomena, such as fire in an aircraft cargo bay, includes receiving a plurality of video images from a plurality of sources, compensating the images to provide enhanced images, extracting features from the enhanced images, and combining the features from the plurality of sources to detect the video phenomena. Extracting features may include determining an energy indicator for each of a subset of the plurality of frames. Detecting video phenomena may also include comparing energy indicators for each of the subset of the plurality of frames to a reference frame. The reference frame corresponds to a video frame taken when no fire is present, video frame immediately preceding each of the subset of the plurality of frames, or a video frame immediately preceding a frame that is immediately preceding each of the subset of the plurality of frames. Image-based and non-image based techniques are described herein in connection with fire detection and/or verification and other applications.
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公开(公告)号：US07256818B2
公开(公告)日：2007-08-14
申请号：US10152323
申请日：2002-05-20
CPC分类号： G08B17/125
摘要： Detecting a fire, such as a fire in an aircraft cargo bay, includes receiving a plurality of frames of video information, determining an energy indicator for each of a subset of the plurality of frames, and detecting the presence of fire in response to the energy indicator for each of the subset of the plurality of frames corresponding to a predetermined pattern as a function of time. Detecting a fire may also include comparing energy indicators for each of the subset of the plurality of frames to a reference frame. The reference frame may correspond to a video frame taken when no fire is present or a video frame immediately preceding each of the subset of the plurality of frames. At least some of the subset of the plurality of frames may be provided by a camera having a sensitivity of between 400 nm and 1000 nm that may generates 640×480 pixels per frame. At least some of the subset of the plurality of frames may be provided by a CCD camera or a CMOS camera. At least some of the subset of the plurality of frames may be provided by a camera having a sensitivity of between 7 and 14 micrometers, which may be an IR camera.
摘要翻译： 检测飞机货舱中的火灾，例如接收多个视频信息帧，确定多个帧的子集中的每一个的能量指示符，以及响应于能量来检测火灾的存在 指示符对应于作为时间的函数的预定模式的多个帧的每个子集。 检测火也可以包括将多个帧的子集中的每一个的能量指示符与参考帧进行比较。 参考帧可以对应于当不存在火焰时拍摄的视频帧或紧邻在多个帧的每个子集之前的视频帧。 多个帧的子集中的至少一些可以由具有在400nm和1000nm之间的灵敏度的相机提供，每帧可以产生640×480像素。 多个帧的子集中的至少一些可以由CCD照相机或CMOS照相机提供。 多个帧的子集中的至少一些可以由具有7至14微米的灵敏度的相机提供，其可以是IR相机。
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6.发明申请Alternative direct sequence spread spectrum symbol to chip mappings and methods for generating the same 失效替代的直接序列扩频符号到码片映射及其生成方法公开(公告)号：US20080310482A1
公开(公告)日：2008-12-18
申请号：US11818031
申请日：2007-06-13
IPC分类号： H04B1/38
CPC分类号： H04J13/10 , H04J13/004
摘要： Alternative direct sequence spread spectrum symbol to chip mappings and methods for generating the same for use in a direct sequence spread spectrum wireless protocol and embedded in a transceiver chip used by wireless subsystems are provided. The present invention discloses alternative symbol to chip mappings that are orthogonal or nearly orthogonal to the N/2 unused chip sequences defined by a standard transmission protocol. The present invention is advantageous because it provides for an increased number of users and better reliability for wireless subsystems operating in increasingly overcrowded frequency bands. Other advantages of the present invention include a reduction in the negative effects of clear channel assessment including delayed or cancelled signal transmission and interference for wireless subsystems that transmit time-sensitive data.
摘要翻译： 提供了替代的直接序列扩频符号到芯片映射及其生成方法，用于直接序列扩频无线协议并嵌入到无线子系统使用的收发器芯片中。 本发明公开了与由标准传输协议定义的N / 2未使用的码片序列正交或几乎正交的备选符号到码片映射。 本发明是有利的，因为它为越来越拥挤的频带中操作的无线子系统提供了更多的用户和更好的可靠性。 本发明的其它优点包括减少透明信道评估的负面影响，包括延迟或取消的信号传输和干扰传送时间敏感数据的无线子系统。
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公开(公告)号：US6157894A
公开(公告)日：2000-12-05
申请号：US996858
申请日：1997-12-23
申请人： Robert Alan Hess , Mark George Walker , Radoslaw Romuald Zakrzewski , Luis Carlos Rabelo , Robert Curtis North , Scott Robert Durkee
发明人： Robert Alan Hess , Mark George Walker , Radoslaw Romuald Zakrzewski , Luis Carlos Rabelo , Robert Curtis North , Scott Robert Durkee
IPC分类号： B64D37/00 , G01F23/00 , G01F23/18 , G01F23/296 , G01F17/00
CPC分类号： G01F23/296 , B64D37/00 , G01F23/0069 , G01F23/0076 , G01F23/18
摘要： Liquid gauging system for liquid in a container includes a plurality of sensors; each of the sensors measuring a respective parameter of the liquid in the container and producing a sensor output related to its measured parameter; there being at least two sensors that measure different parameters of the liquid; and a processor that receives the sensor outputs and determines, based on the sensor outputs, a quantity of the liquid in the container; the processor determining the quantity by executing at least one sensor fusion algorithm that is based on a set of relationships between the measured parameters and the quantity. The gauging system can also include a data fusion process for determining quantity based on a plurality of quantity measurements.
摘要翻译： 用于容器中的液体的液体测量系统包括多个传感器; 每个传感器测量容器中的液体的相应参数，并产生与其测量参数相关的传感器输出; 至少有两个测量液体不同参数的传感器; 以及处理器，其接收所述传感器输出并基于所述传感器输出确定所述容器中的液体的量; 所述处理器通过执行至少一个传感器融合算法来确定所述数量，所述至少一个传感器融合算法基于所述测量参数与所述数量之间的一组 测量系统还可以包括用于基于多个量测量来确定数量的数据融合过程。
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公开(公告)号：US08654758B2
公开(公告)日：2014-02-18
申请号：US13199817
申请日：2011-09-09
IPC分类号： H04J3/06
CPC分类号： H04W56/009
摘要： Synchronizing a wireless sensor includes receiving a first command at the wireless sensor, noting a first timestamp value indicating when the first reply is sent, responding to the first command with a first reply, receiving a second command at the wireless sensor that contains a second timestamp value indicating when the first reply was received and a third timestamp value indicating when the second command was sent to the wireless sensor, noting a fourth timestamp value indicating when the second command was received by the wireless sensor, and determining an offset at the wireless sensor using the first, second, third, and fourth timestamp values. The presence of the first timestamp value may be interpreted as a request to provide timestamp information for synchronization. An access point may communicate with the wireless sensor.
摘要翻译： 同步无线传感器包括在无线传感器处接收第一命令，注意指示何时发送第一应答的第一时间戳值，响应于具有第一应答的第一命令，在无线传感器处接收包含第二时间戳的第二命令 指示何时接收到第一应答的第一时间戳值，以及指示何时向无线传感器发送第二命令的第三时间戳值，注意到指示无线传感器何时接收到第二命令的第四时间戳值，以及确定无线传感器的偏移量 使用第一，第二，第三和第四时间戳值。 第一时间戳值的存在可被解释为提供用于同步的时间戳信息的请求。 接入点可以与无线传感器通信。
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9.发明授权Method and apparatus for fast interpolation of multi-dimensional functions with non-rectangular data sets 失效具有非矩形数据集的多维函数快速插值的方法和装置公开(公告)号：US07203716B2
公开(公告)日：2007-04-10
申请号：US10631934
申请日：2003-07-31
IPC分类号： G06F7/38
CPC分类号： G06F17/17 , G06F17/175
摘要： Interpolation techniques are described for use with data that may not be uniform and may be characterized as scattered. Such data may be obtained in instances where data acquisition may not be easily controlled such as in obtaining experimental data for use with models. Data interpolation techniques may be used in connection with the experimental data to produce a more complete and accurate data set representative of a variety of conditions using as input the non-uniform or scattered data. Such data sets may be used in a variety of applications including providing a realistic and complete set of data for training and verifying neural networks.
摘要翻译： 描述内插技术用于可能不均匀且可能被表征为分散的数据。 在数据获取可能不容易被控制的情况下，例如在获得用于模型的实验数据的情况下，可以获得这样的数据。 数据插值技术可以结合实验数据使用，以产生更为完整和准确的数据集，表示使用非均匀或分散数据作为输入的各种条件。 这样的数据集可以用于各种应用，包括提供用于训练和验证神经网络的真实和完整的数据集。
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公开(公告)号：US6006604A
公开(公告)日：1999-12-28
申请号：US997444
申请日：1997-12-23
IPC分类号： G01F23/00 , G01F23/26 , G01F23/296
CPC分类号： G01F23/0069 , G01F23/26 , G01F23/296
摘要： A method for determining an optimized solution of positions for N liquid surface sensors used to gauge quantity of liquid in the container, comprising the steps of:a) defining geometric limits of the container in terms of coordinates of a three axis (x,y,z) reference coordinate system assigned to the container;b) defining a chromosome structure for an individual, wherein said chromosome structure identifies a solution in terms of position data of the N sensors;c) determining a population of individuals wherein each individual in said population is a possible solution within said geometric limits; each individual having a respective chromosome; andd) executing a genetic algorithm on said population to identify a solution that meets a performance criteria as measured by a predetermined cost function.
摘要翻译： 一种用于确定用于测量容器中的液体量的N个液体表面传感器的位置的优化解的方法，包括以下步骤：a）根据三轴（x，y，y轴）的坐标定义容器的几何极限， z）分配给容器的参考坐标系; b）定义个体的染色体结构，其中所述染色体结构根据N个传感器的位置数据识别解决方案; c）确定个体群体，其中所述种群中的每个个体是所述几何限度内的可能解决方案; 每个个体具有相应的染色体; 以及d）对所述群体执行遗传算法以识别满足由预定成本函数测量的性能标准的解。
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