A system for monitoring the integrity of a plurality of ground conductors has a plurality of monitors, with a different monitor associated with each ground conductor. Each monitor includes a voltage sensor which monitors voltage on a closed circuit of the monitor. Upon the voltage sensor sensing an unexpected voltage, a transmitter of the monitor issues an “alarm” signal, which may be wireless (e.g., being sent using LoRaWAN protocol). The transmitter may issue other signals, including a periodic “heartbeat” signal to confirm continued operation of the monitor, and a “movement” signal to indicate movement of the monitor. The monitor may be GPS-enabled, in which case each signal may include the GPS coordinates of the monitor. The signals issued by the transmitter may ultimately be analyzed by an operator via a user interface platform, which may simultaneously display information regarding two or more of the plurality of monitors.

A gunshot detection system includes gunshot sensor units with microphones for detecting gunshots and capturing audio data depicting the detected gunshots and other ambient sounds, an environmental board with various environmental sensors for generating environmental data indicating environmental conditions. The audio data, environmental data, and position information can be stored locally on local nonvolatile storage of the gunshot sensor unit for later retrieval by law enforcement entities. In one embodiment, the gunshot sensor units include a wired and/or wireless data transfer interface for transferring the audio data, environmental data and/or position information to handheld units of law enforcement entities. The gunshot sensor unit can also stream live captured audio data for live monitoring by a control panel, and might also include speakers for providing audio playback of audio data from the control panel.

A gunshot detection system includes gunshot sensor units with microphones for detecting gunshots and capturing audio data depicting the detected gunshots and other ambient sounds, an environmental board with various environmental sensors for generating environmental data indicating environmental conditions. The audio data, environmental data, and position information can be stored locally on local nonvolatile storage of the gunshot sensor unit for later retrieval by law enforcement entities. In one embodiment, the gunshot sensor units include a wired and/or wireless data transfer interface for transferring the audio data, environmental data and/or position information to handheld units of law enforcement entities. The gunshot sensor unit can also stream live captured audio data for live monitoring by a control panel, and might also include speakers for providing audio playback of audio data from the control panel.

A monitoring system includes an arithmetic processor. The arithmetic processor receives captured image information representing a captured image obtained by capturing an image of a subject and generates notification information representing a particular notification content depending on a condition of the subject. The arithmetic processor includes a first arithmetic processor and a second arithmetic processor. The first arithmetic processor obtains a condition quantity by quantifying the condition of the subject by reference to the captured image information and based on a parameter about a human activity status. The second arithmetic processor selects, according to the condition quantity, the particular notification content from contents of notification classified into N stages, where N is an integer equal to or greater than three.

An antitheft device for a power generator electrically connectable to a work machine, comprising an acquisition unit configured to acquire position information from each of a plurality of power generators, a setting unit configured to set a single area including positions of the plurality of power generators as a movable area based on the position information acquired by the acquisition unit, and a notification unit configured to make a predetermined notification if at least one of the plurality of power generators has moved out of the movable area set by the setting unit.

Embodiments of this application provide a fire-fighting switch device and a fire-fighting system, which are applied to the field of fire-fighting. The fire-fighting switch device includes a plurality of fire detection switch units, where the fire detection switch unit includes one or more fire detection switches, the one or more fire detection switches form at least one switch path, the fire detection switch is configured to turn on when a fire is detected, and any one of the switch paths is configured to transmit a voltage signal to a fire-extinguishing device when all of the fire detection switches on the switch path are turned on. In this solution, when a fire is detected by one fire detection switch unit, the fire-extinguishing device can be controlled to extinguish the fire provided that all fire detection switches on one switch path in the fire detection switch unit are turned on.

A notification appliance is disclosed. The notification appliance may be a strobe notification appliance, such as an LED strobe notification appliance. The notification appliance may be wall-mounted or ceiling-mounted. Further, the notification appliance may include an optic that is configured to shape the light output from the notification appliance. For example, in a wall-mount, the optic may be mounted off-axis of a plane defined by a back plate of the notification appliance. Further, the notification appliance may be composed of a back plate, a driver board, and a front housing, with the front housing being attached to one or both of the back plate and the driver board. Moreover, the notification appliance may be used with an adapter bracket, which may be used to connect the notification appliance with one or more types of junction boxes.

Disclosed is a socket for removably connecting a hazard detector to a networked alarm system, the system having a first controller which is a system controller, the socket having: a housing having a base, an electrical interface for removably receiving the detector, and a second controller which is a socket controller mounted to the base, the socket controller maintaining wireless and/or wired network communications with the system controller when the detector is connected and disconnected.

Disclosed is a socket for removably connecting a hazard detector to a networked alarm system, the system having a first controller which is a system controller, the socket having: a housing having a base, an electrical interface for removably receiving the detector, and a second controller which is a socket controller mounted to the base, the socket controller maintaining wireless and/or wired network communications with the system controller when the detector is connected and disconnected.

Disclosed is a hazard detector connected to a circuit that has: a plurality of circuit ends and a plurality of detectors, wherein the detector is connected intermediate the plurality of circuit ends, a circuit driver connected to the plurality of circuit ends so that the circuit forms a loop circuit, the circuit driver controlling one or more power sources to selectively provide power to the first circuit end and the second circuit end, and the detector has a short isolator switch that, when opened, breaks electrical continuity downstream of the detector, wherein the detector scans for a short at startup by receiving power, closing the switch, measuring one or more circuit parameters, and determining whether there is a short based on the one or more parameters.