Abstract:
A method for controlling data flow in a wireless body area network includes transmitting sensor data from a plurality of sensor nodes to a gateway via a first transmission channel. The method further includes transmitting beacon data from the gateway to the plurality of sensor nodes via the first transmission channel. The method also includes determining channel packet loss information of the first transmission channel based on at least one of a beacon packet loss information included in the sensor data and a sensor packet loss information included in the beacon data. The method further includes comparing the channel packet loss information with a packet loss threshold. The method also includes switching flow of the sensor data and the beacon data through a second transmission channel instead of the first transmission channel, if the channel packet loss information is greater than the packet loss threshold.
Abstract:
A remote monitoring system is presented. The system includes a sensor unit disposed in the electrical device, and configured to obtain measurement characteristics in response to a measurand of the electrical device, obtain reference characteristics insensitive to the measurand of the electrical device, and communicate the measurement characteristics and the reference characteristics using time varying electromagnetic fields. Further, the system includes a reader unit to establish a far-field communication with the sensor unit in the presence of at least one metallic interferer in the electrical device, wherein the reader unit is configured to receive the time varying electromagnetic fields associated with the measurement characteristics and the reference characteristics in response to a radio frequency signal transmitted to the sensor unit, and determine the measurand of the electrical device based on at least one property of the received time varying electromagnetic fields associated with the measurement characteristics and the reference characteristics.
Abstract:
A system for generating hazard alerts is provided. The system includes a plurality of sensor units including a plurality of sensors and a locating device, and a hazard analyzing (HA) computing device configured to communicate with the sensor units and including at least one memory device configured to store a scene definition, the scene definition defining a coordinate space of a worksite, and at least one processor configured to receive, from the sensors, a plurality of sensor measurements, receive, from the locating device of each sensor unit, at least one coordinate of the coordinate space, determine, based on the at least one coordinate, a location of the sensor unit during each sensor measurement, and determine, for at least a first sensor unit, that an alert condition is present based on the scene definition, the sensor measurements, and the determined location associated with the first sensor unit.
Abstract:
A method for controlling data flow in a wireless body area network includes transmitting sensor data from a plurality of sensor nodes to a gateway via a first transmission channel. The method further includes transmitting beacon data from the gateway to the plurality of sensor nodes via the first transmission channel. The method also includes determining channel packet loss information of the first transmission channel based on at least one of a beacon packet loss information included in the sensor data and a sensor packet loss information included in the beacon data. The method further includes comparing the channel packet loss information with a packet loss threshold. The method also includes switching flow of the sensor data and the beacon data through a second transmission channel instead of the first transmission channel, if the channel packet loss information is greater than the packet loss threshold.
Abstract:
A system includes a first network member that includes a first channel and a second channel. The first channel is configured as a charging channel and is configured to at least one of wirelessly receive or transmit power. The first channel is also configured to transmit network pairing information for at least one of pairing or un-pairing the first network member and a second network member. The network pairing information is transmitted over the first channel at a first frequency. The second channel is configured as an operational channel, and is configured to communicate operational information between the first and second network members when the first and second network members are paired. The operational information is transmitted over the second channel at a second frequency that is different than the first frequency.
Abstract:
A sensor assembly includes an impedance sensor element, an impedance sensor reader and a communications module. The communications module is configured to communicate with a remote computing device. The impedance sensor reader is coupled to the impedance sensor element. The impedance sensor reader includes a synthesizer and a detector. The synthesizer is configured to output an excitation signal having known values for a plurality of signal characteristics to the impedance sensor element and to generate the excitation signal based on a plurality of direct digital synthesizer (DDS) coefficients received from the remote computing device through the communications module. The detector is coupled to the impedance sensor element and configured to detect a response of the impedance sensor element to the excitation signal and determine an impedance of the impedance sensor element based at least in part on the response of the impedance sensor element to the excitation signal.
Abstract:
A method for generating a sampled plethysmograph data, includes measuring a plethysmograph waveform indicative of a first cardiac cycle and a second cardiac cycle, each cycle including a systolic waveform and a diastolic waveform. The method further includes estimating a first start time and a first duration for the systolic waveform of the first cardiac cycle and computing a plurality of amplitudes at a plurality of time instants for the first duration. The method further includes determining a second start time and a second duration of the systolic waveform of the second cardiac cycle. The method also includes assigning the second cardiac cycle, the second start time, and the second duration to the first cardiac cycle, the first start time, and the first duration respectively. The method further includes iteratively performing the steps of measuring, estimating, computing, determining and assigning for the plurality of cardiac cycles acquired sequentially in time.
Abstract:
Systems and methods for managing patient monitoring devices are disclosed. Patient information is transmitted from a patient sensor operatively coupled to a patient to a patient monitor. The patient sensor and the patient monitor are communicatively coupled over a communications network available in a designated monitoring area. Further, loss of the patient sensor from the designated monitoring area is detected by one or more of the patient sensor, the patient monitor and a user. One or more loss prevention indicators are initiated at the patient sensor upon detecting the loss of the patient sensor. Additionally, the loss prevention indicators are communicated to indicate location of the lost patient sensor.
Abstract:
A system for managing transfer of data in a medical body area network (MBAN) is presented. The system includes one or more sensor units disposed on a patient and configured to acquire data from the patient. Moreover, the system includes one or more detachable wireless communication and battery units, where the one or more detachable wireless communication and battery units are detachably coupled to a corresponding sensor unit. In addition, the system includes a patient monitoring device in bi-directional wireless communication with the one or more detachable wireless communication and battery units and configured to receive sensor data and maintain network connectivity between the one or more wireless communication and battery units and the patient monitoring device based on an operating condition of at least one wireless communication and battery unit of the one or more wireless communication and battery units.
Abstract:
A system includes wireless sensor devices monitoring a patient, a gateway device providing dual-frequency adaptive protocol time synchronization signals to the sensor devices, the time synchronization signals including a communication frame structure having time slots including two beacon signal time slots and a plurality of data slots, where the sensor devices transmit respective patient data a first time interleaved within a first data slot and a second time interleaved within a second data slot, the first interleaved data transmission and the second interleaved data transmission are each transmitted at respective different frequencies provided to the sensor devices in beacon signals received from the gateway device. The first interleaved data transmission includes both current data and previous data from the at least two wireless sensor devices, and a frequency agility pattern separates adjacent channels by a respective predetermined frequency offset. A method and non-transitory medium are disclosed.