WSAN SIMULTANEOUS FAILURES RECOVERY METHOD
    1.
    发明申请
    WSAN SIMULTANEOUS FAILURES RECOVERY METHOD 有权
    WSAN同时故障恢复方法

    公开(公告)号:US20140325257A1

    公开(公告)日:2014-10-30

    申请号:US13873101

    申请日:2013-04-29

    CPC classification number: G06F11/2002 H04L41/0654 H04W24/04

    Abstract: The WSAN simultaneous failures recovery method ranks each node based on the number of hops to a pre-designated root node in the network. The method identifies some nodes as cluster heads based on the number of their children in the recovery tree. The method assigns a recovery weight and a nearby cluster node to each node. Nearby cluster nodes serve as gateways to other nodes that belong to that cluster. The recovery weight is used to decide which node is better to move in order to achieve lower recovery cost. The recovery method uses the same on-going set of actors to restore connectivity. Simulation results have demonstrated that the recovery method can achieve low recovery cost per failed node in small and large networks. The results have also shown that clustering leads to lower recovery cost if the sub-network needs to re-establish links with the rest of the network.

    Abstract translation: WSAN同时故障恢复方法根据到网络中预先指定的根节点的跳数对每个节点进行排序。 该方法根据恢复树中的子项数量将某些节点标识为簇头。 该方法为每个节点分配恢复权重和附近的集群节点。 附近的集群节点作为属于该集群的其他节点的网关。 恢复重量用于决定哪个节点更好地移动以实现较低的恢复成本。 恢复方法使用相同的正在进行的actors来恢复连接。 模拟结果表明,恢复方法可以在小型和大型网络中实现每个故障节点的低恢复成本。 结果还表明,如果子网需要重新建立与网络其余部分的链路,则聚类导致降低恢复成本。

    SYNCHRONIZATION-FREE PIPELINE LEAK DETECTION SYSTEM AND METHOD
    3.
    发明申请
    SYNCHRONIZATION-FREE PIPELINE LEAK DETECTION SYSTEM AND METHOD 审中-公开
    无同步管道泄漏检测系统和方法

    公开(公告)号:US20160258834A1

    公开(公告)日:2016-09-08

    申请号:US14639088

    申请日:2015-03-04

    CPC classification number: G01M3/243

    Abstract: The synchronization-free pipeline leak detection system includes a plurality of acoustic sensor nodes positioned equidistantly and linearly against an external surface of a wall of a pipeline. Each of the acoustic sensor nodes receives an acoustic signal generated by a leak in the wall of the pipeline, which is transmitted through fluid flowing through the pipeline. Each of the acoustic sensor nodes measures an acoustic received signal strength associated with the acoustic signal and transmits a signal representative of the respective acoustic received signal strength to the immediately adjacent acoustic sensor nodes if the respective acoustic received signal strength is greater than a threshold signal strength value. From the transmitted acoustic received signal strengths between sensor nodes, the sensor node closest to the leak can be determined. From known values stored in each sensor node, the position of the leak can be calculated and transmitted in an alert signal.

    Abstract translation: 无同步流水线泄漏检测系统包括多个声学传感器节点,其等距地且线性地抵靠管道的壁的外表面。 每个声学传感器节点接收由管道壁中的泄漏产生的声信号,其通过流过管道的流体传输。 每个声学传感器节点测量与声学信号相关联的声学接收信号强度,并且如果相应的声学接收信号强度大于阈值信号强度,则将代表相应声学接收信号强度的信号传送到紧邻的声学传感器节点 值。 从传感器节点之间传输的声接收信号强度可以确定最接近泄漏的传感器节点。 从存储在每个传感器节点中的已知值可以计算泄漏的位置并在警报信号中发送。

    RESTORING CONNECTIVITY IN PARTITIONED WIRELESS SENSOR AND ACTOR NETWORKS

    公开(公告)号:US20180091982A1

    公开(公告)日:2018-03-29

    申请号:US15276301

    申请日:2016-09-26

    Inventor: UTHMAN BAROUDI

    Abstract: Aspects of the disclosure provide a method for restoring connectivity among partitioned segments in a partitioned wireless sensor and actor network (WSAN). The method includes placing batches of mobile nodes at locations surrounding mobile nodes previously placed within a damaged area of the partitioned WSAN, spreading the batches of mobile nodes, determining whether connectivity among the partitioned segments has been restored, and repeating placing batches of mobile nodes, spreading the patches of mobile nodes, and determining whether connectivity among the partitioned segments has been restored when connectivity among the partitioned segments is not restored.The method is based on a distributed dropping approach which introduces minimal disruption to previously deployed mobile nodes, and decreases total travelled distance a mobile node might move compared with a traditional central dropping approach. Thus, the distributed dropping approach can expedite the restoration process, reduce power consumption, and expand survival time of a WSAN.

    ROUTE REPAIR OF AD HOC ON-DEMAND DISTANCE VECTOR ROUTING PROTOCOL IN A WIRELESS SENSOR NETWORK

    公开(公告)号:US20170238197A1

    公开(公告)日:2017-08-17

    申请号:US15045925

    申请日:2016-02-17

    Abstract: Systems and methods include a WSN having sensor nodes that are configured with electronic circuitry for interfacing with one or more associated sensors. The WSN also includes a gateway sensor node configured to receive sensor data from and forward instructions to the one or more sensor nodes, and a server configured to control the WSN in combination with the gateway sensor node. The WSN also includes circuitry configured to recognize a link break within a data communication route of the WSN via a routing protocol, and buffer incoming packets from a source node. The circuitry is also configured to propagate a RERR message of the link break to the plurality of sensor nodes, and build a bypass route around the link break of the data communication route towards a destination node. The circuitry is also configured to send the buffered incoming packets to the destination node through the bypass route.

    FASTENER TENSION MONITORING SYSTEM
    6.
    发明申请
    FASTENER TENSION MONITORING SYSTEM 有权
    紧固件张力监测系统

    公开(公告)号:US20140190267A1

    公开(公告)日:2014-07-10

    申请号:US13737908

    申请日:2013-01-09

    CPC classification number: G01L5/0038 F16B31/02 G01L1/16

    Abstract: The fastener tension monitoring system provides for automatic notification when a structural tensile fastener, such as a bolt, is loosened. The system incorporates piezoelectric material in the core of the fastener shank or deposited around the shank. The piezoelectric material communicates electrically with an electrical storage device, a microprocessor, and a transmitter installed on the fastener head. Vibration or other changes in the tensile force developed by the fastener result in electrical impulses being generated by the piezoelectric material, generating electrical energy that is stored in the storage device and used to operate the microprocessor. In the event that an out of tolerance condition is sensed by the microprocessor, the transmitter is activated to send a signal to that effect. A receiver and computer are provided to monitor any such signals. The piezoelectric material may include pyroelectric material as well for the generation of electrical energy due to temperature changes.

    Abstract translation: 紧固件张力监测系统在诸如螺栓之类的结构拉伸紧固件松动时提供自动通知。 该系统将压电材料结合在紧固件柄的芯中或者围绕柄部沉积。 压电材料与安装在紧固件头上的蓄电装置,微处理器和变送器电连通。 由紧固件产生的张力的振动或其他变化导致由压电材料产生的电脉冲,产生存储在存储装置中并用于操作微处理器的电能。 在微处理器感测到超出公差条件的情况下,发射机被激活以发送一个信号。 提供接收机和计算机来监视任何这样的信号。 压电材料可以包括热电材料以及由于温度变化而产生电能。

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