A detector may include processing circuitry configured to receive monitoring data associated with an environment being monitored, where the monitoring data includes a series of frames of three-dimensional point cloud information. The processing circuitry may be further configured to perform image segmentation on the monitoring data to generate segmented three-dimensional data associated with the environment, identify one or more objects in the environment based on subtracting background from the segmented three-dimensional data, convert data associated with the one or more objects from the segmented three-dimensional data into two-dimensional object data, and perform object classification on the two-dimensional object data.

A gas detection device and a gas detection process monitor an area for a combustible target gas. A detector (10), a compensator (11.1), a sensor array (40, 41) and an analysis unit (9) are arranged in a gas detection device housing. The detector includes an electrically conductive wire with a heating segment (20), electrical insulation around the wire and a catalytic material in the electrical insulation. The compensator extends in a plane and includes an electrical strip conductor (32) with a heating segment and a carrier plate for the strip conductor. The gas detection device applies an electrical voltage to the detector and to the compensator. The detector oxidizes the target gas with the heating segment. The sensor array measures detection variables (U10, U11) for the detector and the compensator. The analysis unit compares the two detection variables to determine if a combustible target gas is present.

Methods and a system for detecting physical intrusion are providing, including sampling a set of seismic signals from a vibration sensor of a buried sensor intrusion device, determining that the set of seismic signals matches a seismic threat pattern and responsively generating a seismic alert, recording a surveillance video of an area under which the sensor device has been buried, processing the surveillance video to determine whether a human figure is present and, responsively to determining that a human figure is present and to the generation of the seismic alert, issuing an threat detection alert.

Methods and a system for detecting physical intrusion are providing, including sampling a set of seismic signals from a vibration sensor of a buried sensor intrusion device, determining that the set of seismic signals matches a seismic threat pattern and responsively generating a seismic alert, recording a surveillance video of an area under which the sensor device has been buried, processing the surveillance video to determine whether a human figure is present and, responsively to determining that a human figure is present and to the generation of the seismic alert, issuing an threat detection alert.

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.

In certain embodiments, real-time playback modification for activity event playback may be facilitated. In some embodiments, an event list portion and an event playback portion may be provided on a user interface, where the event playback portion is configured to present a playback of events on a location map in accordance with event detection times and a set of event layers for the event playback. While the event playback is occurring, a user selection of events may be obtained via the event list portion of the user interface. While the event playback is occurring, a set of layers for the event playback may be modified based on the user selection. In some embodiments, based on the modification to the set of layers, event layers may be overlaid onto the location map of the event playback portion of the user interface.

A gunshot detection system includes a control panel that receives event data from gunshot sensor units detecting gunshots and generates location information pertaining to a shooting event based on the event data. The control panel includes a display on which a graphical user interface (GUI) is rendered. The GUI displays maps of a building with icons overlaid on the maps based on the generated location information. In one example, the GUI displays a map with an icon representing the active shooter, the position of the icon with respect to the floorplan image corresponding to an area of the building. In another example, the GUI displays a map with icons representing different gunshot sensor units, the icons having different visual characteristics to indicate that the gunshot sensor units detected the gunshots and/or which of the gunshot sensor units was determined to be closest to the detected gunshots.

A gunshot detection system includes a control panel that receives event data from gunshot sensor units detecting gunshots and generates location information pertaining to a shooting event based on the event data. The control panel includes a display on which a graphical user interface (GUI) is rendered. The GUI displays maps of a building with icons overlaid on the maps based on the generated location information. In one example, the GUI displays a map with an icon representing the active shooter, the position of the icon with respect to the floorplan image corresponding to an area of the building. In another example, the GUI displays a map with icons representing different gunshot sensor units, the icons having different visual characteristics to indicate that the gunshot sensor units detected the gunshots and/or which of the gunshot sensor units was determined to be closest to the detected gunshots.

A sounder apparatus 100 includes a sounder 110 having at least two volume settings, at least one detector 120, a micro-controller wherein the micro controller is configured to receive an input signal from the at least one detector 120, and to control the volume setting of the sounder based on the input signal.