Example systems, devices, media, and methods are described for tracking one or more movable objects and presenting virtual elements on a display in proximity to the tracked movable objects. One or more ultra-wideband (UWB) transmitters are mounted to each movable object in a physical environment including at least two synchronized UWB receivers. The receivers calculate a current location of each movable object. A plurality of portable electronic devices, including one or more eyewear devices, are paired with the receivers in a network. A localization application determines a current location of each eyewear device. A rendering application presents one or more virtual elements on a display as an overlay relative to the current movable object location and in relative proximity to the current eyewear location. The physical environment is represented by a static mesh. A time synchronized tracking application identifies moving items that are not coupled to a UWB transmitter. The rendering application presents the virtual elements on the display in accordance with the static mesh and the moving items.

A radio beacon system configured to assist autonomous flight of one or more unmanned aerial vehicles (UAVs), wherein the radio beacon system comprises: —a drone device (200), configured to be installed on an UAV and including a radio transceiver, and —a radio beacon device (100), configured to be installed on ground and including N antenna arrays (110, 120) with N≥2, one or more radio transceivers configured to communicate with the radio transceiver of the drone device (200), and at least one processing unit (130), wherein each antenna array (110, 120) has M antenna elements (115, 125) with M≥2 associated to respective beamforming electronic weights w(n, m), with n ranging from 1 to N and m ranging from 1 to M, wherein said at least one processing unit (130) is configured to perform an adaptive beamforming method for assisting autonomous flight of the UAV.

Systems for position determination using an energy chain for guiding supply lines, which energy chain has a movable run which is fixed at an end to a driver and a stationary run wherein the driver moves back and forth along a track. The system has a sensor device for position determination, which is attached to the driver. In one variant, the system comprises guide components, arranged along the track, for lateral guidance of the energy chain of which components at least one has a reference component acting as a position reference. In another variant of the system, at least each nth chain link of the energy chain has at least one reference component attached thereto. In both variants, the sensor device for position determination interacts with individual reference components, which allows better and more reliable determination of the current position.

An identity-locked personal item is provided with a lock body configured to receive and release an engagement member upon receiving a matched biometric imprint from an authorized user. An actuator mechanism is connected to at least one capacitive surface and a controller with an integrated power supply inside the lock body, the lock body being further integrated into a secured container. The controller is configured to receive a contact datum from the capacitive surface, the actuator mechanism being operated upon recognition of a known datum or biometric signature.

A modular backpack system includes a personal floatation harness having an automatic inflator mechanism and pack attachment features; and a plurality of pack modules selectively attachable to the pack attachment features to form a floatation-enhanced backpack. Each one of the plurality of pack modules may further include a different arrangement for accommodating accessories. For example, the different arrangements may include arrangements having different compartments. Other arrangements may have different attachment features. The different attachment features may include different lash points. The backpack module may be one taken from the list of: a pack adapted for kayaking with a waterproof compartment and lash points for ready access to accessories; a pack adapted for sailing with waterproof and non-waterproof compartments; a pack adapted for hiking with multiple compartments for tools and supplies; and a pack adapted for everyday carry (EDC) having multiple quick-access compartments for carrying everyday tools.

Beacon systems include a beacon including a transmitter, a processor, and a sensor for collecting sensor data, wherein the beacon broadcasts a beacon message comprising informational data based on a value of the sensor data and data regarding a minimum received signal strength for the relevance of the beacon message. The beacon system may include a receiving device, wherein the receiving device comprises a processor and an alarm adapted to be triggered by the beacon message, wherein the processor determines a relevance of the beacon message by comparing the minimum received signal strength for the relevance of the beacon message to an actual received signal strength of the beacon message, wherein, if the actual received signal strength is greater than or equal to the minimum received signal strength, the receiving device is within a range of relevance and the alarm is triggered.

A method performed at a beacon for broadcasting position reference signals and a method performed at a network control node, a beacon, a network control node and a computer program are disclosed. The method performed at the beacon comprises: transmitting a network access signal indicative of a geographical location of the beacon; receiving a network control signal from a network control node, the network control signal comprising a configuration control signal indicative of configuration information for broadcast of the position reference signals; and broadcasting position reference signals in accordance with the configuration information.

In an embodiment a real-time location method includes sending, by a master beacon device and one or more beacon repeater devices, ultra-wideband beacon frames, wherein the ultra-wideband beacon frames are transmitted as interleaved pairs of ultra-wideband beacon frames, wherein each interleaved pair is sent either from the master beacon device or the one or more beacon repeater devices, wherein each interleaved pair includes a first ultra-wideband beacon frame and a second ultra-wideband beacon frame, and wherein, for each interleaved pair, the first ultra-wideband beacon frame and the second ultra-wideband beacon frame are transmitted with a master time delay, receiving, by one or more tag devices, at least one of the interleaved pairs of ultra-wideband beacon frames, receiving, by the one or more beacon repeater devices, at least one of the interleaved pairs of ultra-wideband beacon frames, receiving, by one of a plurality of tag response receptor units, at least one of the interleaved pairs of ultra-wideband beacon frames, sending, by the one or more tag devices, ultra-wideband tag response frames and receiving, by the one of the plurality of tag response receptor units, at least one of the ultra-wideband tag response frames.

A method can include, by operation of a user device, receiving beacon data via a wireless signal. Beacon data can include unencrypted data that includes a key identification (ID) corresponding to a private key/public key pair, a time value, and a location value. Beacon data can also include encrypted data that includes at least a beacon ID, a beacon time value, and a beacon location value. If the unencrypted time value is within a predetermined range of a current time value of the user device, the beacon data can be stored in a user record with a user ID. Periodically, the user record can be uploaded to a tracking system. Corresponding devices and systems are also disclosed.

An apparatus for tracking hand hygiene in a bathroom includes at least a radio and a controller. The radio is configured to receive a direct connection probe from a mobile device. The controller is configured to receive sensor data associated with hand hygiene and match the sensor data associated with hand hygiene with an identifier for the mobile device based on the direction connection probe to determine whether a hand hygiene threshold is met.