Methods, apparatuses, and systems for wildfire detection using power infrastructure are described. One or more aspects of the techniques described include determining (e.g., quantifying) the impact of wildfires on power structures and transmission line sensors. Determination of measurable changes in transmission line temperature and transmission line sag, that result from early onset fires, are used to detect heat events. Therefore, real-time monitoring of transmission line temperature and transmission line sag (e.g., using sensors that are already deployed in some power grid infrastructures) may efficiently detect the early onset of wildfires according to techniques described herein.

There is described a network distribution system using common communication and power comprising a power line, multiple fire alarm units, and a power line control device. The power line provides alternating current, and the fire alarm units are coupled to the power line. The power line control device is coupled to the power line and a particular fire alarm unit of the plurality of fire alarm units. The power line control device comprises a communication translator to convert between power line and non-power line protocols and a power line core to modulate signals to, and demodulate signals from, the power line.

There is described a network distribution system using common communication and power comprising a power line, multiple fire alarm units, and a power line control device. The power line provides alternating current, and the fire alarm units are coupled to the power line. The power line control device is coupled to the power line and a particular fire alarm unit of the plurality of fire alarm units. The power line control device comprises a communication translator to convert between power line and non-power line protocols and a power line core to modulate signals to, and demodulate signals from, the power line.

A testing device for emergency lighting equipment including a main control unit and at least one control module, where each of the at least one control module is used to check operational readiness of an emergency lighting device, and the main control unit and the at least one control module are all connected to a network to form a control system for a smart phone or a building security monitoring system to perform a remote inspection operation on at least one aforementioned emergency lighting device via the network.

The invention relates to alarm systems using wired and wireless transmission systems. A method for transmitting a signal from wired security sensors and/or fire annunciators is proposed, the method comprising wire-connecting the security sensor and/or fire annunciator to an input from a set of inputs of a signal transmission device, which comprises an analogue-to-digital converter that is coupled to a controller and a power supply unit. Each of the set of inputs of the signal transmission device is associated with an input zone from a set of the input zones. Information regarding the input zones and the inputs of the signal transmission device associated therewith is stored within a storage device that is coupled to the controller. The controller periodically receives wired connection resistance parameters for each input zone, and the received wired connection resistance parameters of the input zone are compared with predefined resistance parameters of this input zone, which are stored within said storage device. A status is assigned for each input zone depending on results of comparison of the received resistance parameters with the predefined resistance parameters, including an “alarm” status for the input zone that has the wired connection resistance parameters, which differ from the predefined resistance parameters. The controller forms a data packet comprising information regarding a status of each input zone, for which the wired connection of the security sensors and/or fire annunciators has been performed, as well as an information regarding an operation status of the signal transmission device. The formed data packet is sent via a radio module, which is coupled to the controller, to a central station that is configured at least to inform regarding a receipt of the “alarm” status. Also, a signal transmission device for implementation of the above-described method is proposed.

The invention relates to alarm systems using wired and wireless transmission systems. A method for transmitting a signal from wired security sensors and/or fire annunciators is proposed, the method comprising wire-connecting the security sensor and/or fire annunciator to an input from a set of inputs of a signal transmission device, which comprises an analogue-to-digital converter that is coupled to a controller and a power supply unit. Each of the set of inputs of the signal transmission device is associated with an input zone from a set of the input zones. Information regarding the input zones and the inputs of the signal transmission device associated therewith is stored within a storage device that is coupled to the controller. The controller periodically receives wired connection resistance parameters for each input zone, and the received wired connection resistance parameters of the input zone are compared with predefined resistance parameters of this input zone, which are stored within said storage device. A status is assigned for each input zone depending on results of comparison of the received resistance parameters with the predefined resistance parameters, including an “alarm” status for the input zone that has the wired connection resistance parameters, which differ from the predefined resistance parameters. The controller forms a data packet comprising information regarding a status of each input zone, for which the wired connection of the security sensors and/or fire annunciators has been performed, as well as an information regarding an operation status of the signal transmission device. The formed data packet is sent via a radio module, which is coupled to the controller, to a central station that is configured at least to inform regarding a receipt of the “alarm” status. Also, a signal transmission device for implementation of the above-described method is proposed.

An apparatus includes an AC-to-DC power supply, with a positive terminal operatively coupled to two two-wire pairs of an Ethernet port to provide a first and second power path over a structured cable. A negative terminal is operatively coupled to a third two-wire pair of the Ethernet port to complete the first power path. Power path control logic has an input port operative to receive a two-wire input signal from an external device, and is operatively coupled to the negative terminal of the AC-to-DC power supply output, and to a fourth two-wire pair of the Ethernet port to complete the second power path. The power path control logic is operative to disconnect the negative terminal of the AC-to-DC power supply from the fourth two-wire pair of the Ethernet port in response to a two-wire input signal received at the input port, to disconnect the second power path.

An apparatus includes an AC-to-DC power supply, with a positive terminal operatively coupled to two two-wire pairs of an Ethernet port to provide a first and second power path over a structured cable. A negative terminal is operatively coupled to a third two-wire pair of the Ethernet port to complete the first power path. Power path control logic has an input port operative to receive a two-wire input signal from an external device, and is operatively coupled to the negative terminal of the AC-to-DC power supply output, and to a fourth two-wire pair of the Ethernet port to complete the second power path. The power path control logic is operative to disconnect the negative terminal of the AC-to-DC power supply from the fourth two-wire pair of the Ethernet port in response to a two-wire input signal received at the input port, to disconnect the second power path.

The disclosure describes a system for monitoring and mitigating damage to electrical utility structures and the surrounding environment. In some embodiments, the system includes fire boxes, arc sensors, angle switches, and disconnect switches configured to generate alert signals when a hazard is detected. In some embodiments, the system includes cameras configured to detect a hazard such as a fire or moving object. In some embodiments, the system includes light transmitters and light receivers positioned at a predetermined location away from power lines to detect objects that interrupt a line of site. In some embodiments, the system can electrically isolate a power line before a detected hazard impacts a power line.

A system and method for early-warning and positioning of overheating in a lithium ion battery pack is disclosed, especially for a single battery in the lithium ion battery pack during use. The system Includes a sensor unit, a controller unit, an alarm unit and an auxiliary unit; the sensor unit includes a special flexible thin film sensor; the controller unit includes a single chip microprocessor, an alarm controller, a computer and a display, the single chip microprocessor and the alarm controller being connected to the computer, the computer being connected to the display; the alarm unit includes a LED alarm light and a buzzer; the single chip microprocessor of the controller unit is connected to the flexible film sensor; the auxiliary unit includes a power supply and a constant value resistor; the power supply provides power separately to the controller unit and the alarm unit, and the constant value resistor is directly connected to the power supply.