A method for finding door location in an automated way based on observations of people that are equipped with a device whose position is determined acoustically. By observing positioning transitions across internal structures such as walls, the location of doors can be automatically identified.

A method for finding door location in an automated way based on observations of people that are equipped with a device whose position is determined acoustically. By observing positioning transitions across internal structures such as walls, the location of doors can be automatically identified.

An AR/VR input device include a processor(s), an internal measurement unit (IMU), and a plurality of sensors configured to detect emissions received from a plurality of remote emitters. The processor(s) can be configured to: determine a time-of-flight (TOF) of the detected emissions, determine a first estimate of a position and orientation of the input device based on the TOF of a subset of the detected emissions and the particular locations of each of the plurality of sensors on the input device that are detecting the detected emissions, determine a second estimate of the position and orientation of the input device based on the measured acceleration and velocity from the IMU, and continuously update a calculated position and orientation of the input device within the AR/VR environment in real-time based on a Beyesian estimation (e.g., Extended Kalman filter) that utilizes the first estimate and second estimate.

Methods and system for locating an event on an aircraft using augmented-reality content, an array of ultrasonic devices configured in mesh topology, and deep learning.

Methods and system for locating an event on an aircraft using augmented-reality content, an array of ultrasonic devices configured in mesh topology, and deep learning.

There is provided a navigation system, comprising: a buoy on a water surface movably anchored to a bottom; a plurality of at least three transmitters fixed to the bottom or at different positions in the water for transmitting signals to specify the positions; a receiver, being disposed with the buoy, configured to receive signals transmitted by the plurality of transmitters; a signal processor, being disposed with the buoy, configured to specify the position of the buoy, based on the signals received by the receiver, and generate a navigation signal indicating the position of the buoy, and a radio, being disposed with the buoy, configured to transmit the navigation signal generated in the signal processor wirelessly, the navigation signal being receivable by a radio in a mobile body.

There is provided a navigation system, comprising: a buoy on a water surface movably anchored to a bottom; a plurality of at least three transmitters fixed to the bottom or at different positions in the water for transmitting signals to specify the positions; a receiver, being disposed with the buoy, configured to receive signals transmitted by the plurality of transmitters; a signal processor, being disposed with the buoy, configured to specify the position of the buoy, based on the signals received by the receiver, and generate a navigation signal indicating the position of the buoy, and a radio, being disposed with the buoy, configured to transmit the navigation signal generated in the signal processor wirelessly, the navigation signal being receivable by a radio in a mobile body.

The system (10) of FIG. 1 uses fixedly-located master and slave smartphone devices (12, 14) to determine a player position of a player (20) within playing arena, such as a tennis court. The master device (12) makes a local determination of the speed of sound using an audible ping to the slave device displaced from the master device by a known distance. The slave device (14) also responds with a time stamp associated with the receipt of one or more pings. Correlation over successive RF-reported time stamps allows the master device (12) to assess, relative to its own internal reference clock, a time offset and drift for a local clock in the slave device (14). A RF connection to a communications circuit and sensor (18) arrangement located in a racket held by a player permits the master device (12) to assess a time offset and drift for a local clock associated with the sensor. The sensor (18) further includes a gyroscope, accelerometer and magnetometer that cooperate to record movement or orientation of the racket, and which information is uplink reported over the RF connection to the master device. When an amplitude or modelled sound profile for a hit event (24) is detected by both the master and slave devices (12, 14) and the hit event time-stamped by the devices in the system and reported to the master by the communications circuits of the racket and slave units, the master unit is able to triangulate the position of the hit event relative to known dimensions of the playing arena. Continuous reporting of movement of the racket relative to the previous hit event can therefore be displayed to show movement of the player around the court relative to detected sound events.

The system (10) of FIG. 1 uses fixedly-located master and slave smartphone devices (12, 14) to determine a player position of a player (20) within playing arena, such as a tennis court. The master device (12) makes a local determination of the speed of sound using an audible ping to the slave device displaced from the master device by a known distance. The slave device (14) also responds with a time stamp associated with the receipt of one or more pings. Correlation over successive RF-reported time stamps allows the master device (12) to assess, relative to its own internal reference clock, a time offset and drift for a local clock in the slave device (14). A RF connection to a communications circuit and sensor (18) arrangement located in a racket held by a player permits the master device (12) to assess a time offset and drift for a local clock associated with the sensor. The sensor (18) further includes a gyroscope, accelerometer and magnetometer that cooperate to record movement or orientation of the racket, and which information is uplink reported over the RF connection to the master device. When an amplitude or modelled sound profile for a hit event (24) is detected by both the master and slave devices (12, 14) and the hit event time-stamped by the devices in the system and reported to the master by the communications circuits of the racket and slave units, the master unit is able to triangulate the position of the hit event relative to known dimensions of the playing arena. Continuous reporting of movement of the racket relative to the previous hit event can therefore be displayed to show movement of the player around the court relative to detected sound events.

A system for monitoring and/or recording a position of a tool in an elevator shaft includes a position measuring system for measuring a position of the tool relative to an elevator car; a height measuring system for measuring a height of the elevator car in the elevator shaft; and an evaluation system designed to receive measured data from the position measuring system and the elevation measuring system and to determine a position of the tool relative to the elevator shaft from the measured data.