摘要:
This invention provides, inter alia, communication devices for contactless underwater data transmission and reception. In one embodiment the present invention provides a transmitting device comprising (a) a water-tight housing; (b) a radiative element disposed outside of the housing, said radiative element comprising at least two antennae, wherein the radiative element is configured to propagate an electric field signal through water; and (c) a communications section disposed within the housing, said communications section being coupled to said radiative element, said communications section comprising at least one transmitter, wherein the communications section is configured to transmit digitally modulated data as an electric field signal propagated by the radiative element. Also provided are similarly constituted receiving devices, transceiving devices, systems containing such devices and methods of using such devices and systems.
摘要:
A creep life management system includes at least one sensor apparatus coupled to a first component. The at least one sensor apparatus is configured with a unique identifier. The creep life management system also includes at least one reader unit coupled to a second component. The at least one reader unit is configured to transmit an interrogation request signal to the at least one sensor apparatus and receive a measurement response signal transmitted from the at least one sensor apparatus. The creep life management system further includes at least one processor programmed to determine a real-time creep profile of the first component as a function of the measurement response signal transmitted from the at least one sensor apparatus.
摘要:
A device for use in determining a location of a component of a system includes a communication interface configured to transmit at least one signal to the component, a display, and a processor coupled to the communication interface and to the display. The processor is programmed to display a representation of the system on the display, display an expected location of the component within the representation, and transmit the at least one signal to the component using the communication interface for use in determining an actual location of the component.
摘要:
A method and system for monitoring and controlling a power distribution system is provided. The system includes a plurality of circuit breakers and a plurality of node electronic units. Each node electronic unit is mounted remotely from an associated circuit breaker that is electrically coupled with one of the node electronic units. The system also includes a first digital network, and a first central control unit. The first central control unit and the plurality of node electronic units are communicatively coupled to the first digital network. The method includes receiving digital signals from each node electronic unit at the central control unit, determining an operational state of the power distribution system from the digital signal, and transmitting digital signals to the plurality of node electronic units such that the circuit breakers are operable from the first central control unit.
摘要:
Systems and techniques are provided for a directional antenna system that employs a wireless link between x-ray apparatus. The system includes a host computer, an x-ray tube with an emission scan channel, a first directional antenna connected to the x-ray tube and with an orientation parallel to the emission channel, a second antenna wirelessly communicating with the first directional antenna, an x-ray detector wirelessly communicating with the x-ray tube, and a rigid panel supporting the second antenna and the x-ray detector being in contact with the emission scan channel. Specific techniques are employed to manage antenna direction and transmission.
摘要:
A secure framework for wireless sensor networks. The framework provides a system and method for providing network device authentication. The system and method comprises installing a unique device key in a network device and creating a chain of keys, wherein each subsequent key is encrypted using the previous key. The method executes an authentication process for storing and issuing keys, wherein the authentication process uses a unique device key to install a device site key in the network device and uses the device site key and the unique device key to authenticate the network device for communicating with a wireless network router, wherein the wireless network router creates a unique network-device-router key. The unique network-device-router key is used to authenticate the network device for communicating over the wireless network using an encrypted network session key and allows secure encrypted link-layer communications over the wireless network.
摘要:
A method and system for monitoring and controlling a power distribution system is provided. The system includes a plurality of circuit breakers and a plurality of node electronic units. Each node electronic unit is mounted remotely from an associated circuit breaker that is electrically coupled with one of the node electronic units. The system also includes a first digital network, and a first central control unit. The first central control unit and the plurality of node electronic units are communicatively coupled to the first digital network. The method includes receiving digital signals from each node electronic unit at the central control unit, determining an operational state of the power distribution system from the digital signal, and transmitting digital signals to the plurality of node electronic units such that the circuit breakers are operable from the first central control unit.
摘要:
A method of monitoring and controlling a power distribution system is provided. The power distribution system includes a plurality of circuit breakers, a plurality of node electronic units, and wherein each associated circuit breaker is electrically coupled with each respective node electronic unit. The system also includes at least one digital network, and at least one central control processing unit (CCPU) wherein each CCPU includes a first power system global information set, and each CCPU is communicatively coupled to the plurality of node electronic units. The method includes transmitting at least one digital message from each node electronic unit to each CCPU over a respective network, determining an operational state of the power distribution system from the digital message, and transmitting at least one multicast message from each CCPU to each node electronic unit such that the circuit breakers are operable from each CCPU.
摘要:
A creep life management system includes at least one sensor apparatus coupled to a first component. The at least one sensor apparatus is configured with a unique identifier. The creep life management system also includes at least one reader unit coupled to a second component. The at least one reader unit is configured to transmit an interrogation request signal to the at least one sensor apparatus and receive a measurement response signal transmitted from the at least one sensor apparatus. The creep life management system further includes at least one processor programmed to determine a real-time creep profile of the first component as a function of the measurement response signal transmitted from the at least one sensor apparatus.
摘要:
A method for communicating information bundled in digital message packets via a digital network communication system is provided. The digital network communication system a sample source and each packet includes a header and a communication payload area. The method includes sampling the source at a first sample rate, selecting at least one decimation of the samples based on at least one of a plurality of algorithmic data rates and a channel bandwidth, determining a packet rate based on a plurality of algorithmic latency requirements, and transmitting the digital message packet containing decimated data on the digital network.