A battery pack comprises an enclosure; a plurality of network nodes that communicate with each other inside the enclosure and that generate a unique radio frequency (RF) signature; and a special-purpose computer processor that compares an incoming channel impulse response (CIR) of the unique radio frequency (RF) signature corresponding to an incoming packet to a plurality of stored valid RF CIR signatures and executes a resemblance metric to accept or reject the incoming packet.

A sensor hub for collecting sensor data during a parachuting or wing-suite event is described herein. In some instances, the sensor hub may include a sensor hub housing, the sensor hub housing including a first cavity that houses a power supply and a communication unit and a second cavity that houses a location sensor and an orientation sensor, wherein the communication unit is configured to share the location sensor and the orientation sensor with a second sensor hub and a helmet that attaches to the sensor hub housing.

A local management-based Power Over Ethernet (PoE) switch and a management system. The PoE switch includes a casing, a Liquid Crystal Display (LCD) screen, a monitoring Micro Control Unit (MCU) module, a power system module, a display module, a PoE system module, a switch system module, a key group arranged on the casing, and a key module. The key module transmits information to the MCU module through the display module, and the MCU module connected with the display module, the PoE system module, the switch system module and the key module respectively through a bus performs corresponding operation according to the information. By adoption of the technical solution, working states of the PoE and switch system modules are visually displayed on the screen, and then are correspondingly processed according to the information and displayed on the screen.

Devices state changes in a building may be determined using a combination of power monitoring and network monitoring. Power monitoring may be performed by obtaining a power monitoring signal and processing the power monitoring signal with models to determine information about state changes of one or more devices in the building. Network monitoring may be performed by receiving information about network packets transmitted by devices in the building and processing the information about the network packets to determine information about state changes of one or more devices in the building. For some devices and some implementations, information about state changes of a device may be determined by using both power monitoring and network monitoring.

Some embodiments provide a non-transitory machine-readable medium that stores a program. The program receives a set of sensor data from a set of sensors. Each sensor in the set of sensors is configured to sense a physical quantity. Based on the set of sensor data, the program further determines that a particular event has occurred. Based on the determination that the particular event has occurred, the program also sends a set of notifications to a set of subscribers.

A fault tolerant interface includes a sensor and a safety control that are electrically connected to each other by a single wire. The sensor is configured to provide various signals to the safety control dependent on environmental parameters. Based on the ignal received by the safety control, the fault tolerant interface may act accordingly and place the overall system in a mitigative state in the event of a fault state or an alarm state. Data and fault or alarm states are detected by determining a first time interval between a first edge and a second edge of a signal, wherein an edge is one of a transition of the signal from a first voltage to a second voltage or a transition of the signal from the second voltage to the first voltage on a single wire. Data values versus fault or alarm states are assigned based on whether a current time interval corresponds to the first time interval or the second time interval, or another time interval associated with alarm or fault states.

Example methods and arrangements for sensors are disclosed herein. At least one storage device or storage disk includes instructions that, when executed, cause at least one processor of a mobile electronic device to at least access notification data indicative of an event at a security perimeter of a building, the notification data corresponding to a change in a status of one or more sensors at the security perimeter; present the notification data to a user of the mobile electronic device, the notification data including image data associated with the event; generate a message based on a user input at the mobile electronic device in response to the notification data; and output the message to cause a responsive action.

A sensor device includes a first antenna configured to receive an interrogation radio frequency (RF) signal; a first sensor configured to detect a first state of a first sensed signal, to output a first sensor signal responsive to the first state meeting a first threshold condition; a first circuit coupled to the first antenna, the first circuit configured to receive the interrogation RF signal from the first antenna, modulate a second RF signal, and transmit the modulated second RF signal as a RF response signal; and a first tag controller configured to receive the first sensor signal and to selectively connect or disconnect the first antenna to or from ground responsive to the first sensor signal, wherein connecting the first antenna to ground prevents the first antenna from transmitting the RF response signal.

To be able to check, from a remote location, a switching result of a power supply route, this communication system comprises: a plurality of terminal stations which each have a function of supplying power to a power supply path; a branching device which switches the power supply route, which includes a power supply path; and a monitoring device which, in response to one of the plurality of terminal stations transmitting to the branching device a switching signal specifying the power supply route, compares the voltages of the power supplied to the power supply paths respectively observed by the plurality of terminal stations, before and after transmission of the switching signal, and which, with the compared power supply voltages each having fluctuated by a first threshold or more, determines a switching result of the power supply route in the branching device.

An information processing apparatus includes a control unit that performs a process of detecting, as sensing information, information that indicates an operation status of a device, and a process of judging, when the sensing information has been detected, by referring to a storage unit that stores therein response content associated with the sensing information, whether to notify a user of the operation status of the device.