A beacon device 10 comprises: a housing 12 having a metallic plate 14 located on an outer surface thereof; a metallic protrusion 18 located in an aperture 20 in the housing, the metallic protrusion being in thermal contact with a temperature sensor 22 located within the housing; a Bluetooth(RTM) transmitter 24; and a controller 26 configured to determine via the temperature sensor that the temperature of the metallic plate has decreased at a rate greater than a predetermined value, the controller in response thereto, outputting at least one alert. The alert may be an audible or visual alert, or a transmission to a linked device. The beacon may comprise a buoyant material 46 to prevent it from sinking if dropped in water. The beacon may be configured to be attached to a wearable item. The beacon may generate an alert upon a person falling into water.
Beacon device
2024-04-17
Patent
Elektronische Ressource
Englisch