摘要:
Methods and systems are described for determining a phase of transmitted voltage. In one embodiment, a power distribution system may operate to transmit voltage and an injected signal. The system may also include a power meter that may receive the voltage and injected signal. The power meter may determine a phase of the received voltage based on the received voltage and the injection signal.
摘要:
A telemeter for telemetry of diagnostic messages from a mobile asset to a remote station comprises a processor coupled to the output of one or more condition sensors. The processor converts the output of the condition sensors to a diagnostic message, and provides the diagnostic message at a processor output. A transmitter is coupled to the processor output. The transmitter is adapted to transmit the diagnostic messages in the Industrial, Scientific, Medical (ISM) frequency band. An exemplary embodiment of a telemetry system of the invention comprises a telemeter adapted to transmit diagnostic messages in the ISM frequency band, and a remote station including a receiver for receiving the diagnostic messages in the ISM band.
摘要:
Systems and/or methods for relaying messages between nodes in a network (e.g. a wireless network) are provided. In accordance with certain exemplary embodiments, substantially simultaneous communications between nodes may be accomplished. At least one secondary message may be piggybacked onto a primary message. Messages in the network may be queued and sent from a transmitter to at least one receiver based at least in part on the signal-to-noise ratio(s) of the receiver nodes with respect to the transmitter. The queuing of the messages may be performed in dependence on a link set that indicates which messages are capable of piggyback communications. Thus, it may be possible to realize a network that reduces collision problems, reduces delays in communications, and/or increases throughput.
摘要:
A non-intrusive physiological data measurement system and method, as well as an optically induced treatment system, are described. The measurement system includes a monitoring mechanism that includes light emitter modules capable of emitting light at at least two wavelengths. The light emitted from the light emitter modules is transmitted through a subject and to a light receiving mechanism, such as an optical sensor. Physiological data is taken from the received light. The system also can ascertain movement of the subject by obtaining an initial outline of the subject and comparing that outline with a subsequently obtained outline. A therapeutic optic system includes a non-adhering light emitting mechanism for providing light at therapeutic wavelengths.
摘要:
A method transmitting a message over at least one of a plurality of channels of a communications network is provided. The method comprises the steps of detecting a presence of jamming pulses in the at least one of the plurality of channels. The characteristics of the jamming pulses in the at least one of the plurality of channels is determined wherein the determined characteristics define at least interstices between the jamming pulses. The message is transmitted over the at least one of the plurality of channels wherein the message is transmitted within the interstices of the jamming pulse determined from the step of determining characteristics of the jamming pulses.
摘要:
A method transmitting a message over at least one of a plurality of channels of a communications network is provided. The method comprises the steps of detecting a presence of jamming pulses in the at least one of the plurality of channels. The characteristics of the jamming pulses in the at least one of the plurality of channels is determined wherein the determined characteristics define at least interstices between the jamming pulses. The message is transmitted over the at least one of the plurality of channels wherein the message is transmitted within the interstices of the jamming pulse determined from the step of determining characteristics of the jamming pulses.
摘要:
The present disclosure describes methods and systems for connecting passive signaling devices (“PSDs”) to a railroad track and using the PSDs to optimize the amplitude, modulation, coding, and frequency of waveforms that applied to the track (by signaling points) for at least three track circuit functions: detecting trains, detecting broken rails, and communicating between signaling points and PSDs.
摘要:
A system and method for communication along a track implementing a channel equalizer is disclosed. The signaling system includes a track having a pair of rails spaced apart in a parallel orientation and a first signaling point electrically connected to the track. A second signaling point is electrically connected to the track and separated from the first signaling point such that the first and second signaling points are capable of communicating track data therebetween. The second signaling point includes therein a channel equalizer configured to filter the track data received from the first signaling point.
摘要:
Surveillance systems and methods having both a radio frequency component and a video image are provided. The radio frequency component can determine the orientation and position of an RFID tag within a surveillance area. The orientation of the RFID tag is can be determined with respect to two or more orthogonal planes using inductance and a predetermined number of mutually orthogonal antenna loops.