Examples of device separation monitors are described herein. In some examples, a first electronic device may include a memory. In some examples, the first electronic device may include a processor in electronic communication with the memory. In some examples, the processor may monitor for separation from a second electronic device based on a geographic location detection zone. In some examples, the processor may detect a zone type switch event. In some examples, the processor may monitor for separation from the second electronic device based on a wireless detection zone in response to detecting the zone type switch event.

Systems are configured for performing GPS-based and sensor-based relocalization. During the relocalization, the systems are configured to obtain radio-based positioning data indicating an estimated position of the system within a mapped environment. The systems are also configured to identify, based on the estimated position, a subset of keyframes of a map of the mapped environment, wherein the map of the mapped environment includes a plurality of keyframes captured from a plurality of locations within the mapped environment, and the plurality of keyframes are associated with anchor points identified within the mapped environment. The systems are further configured to perform relocalization within the mapped environment based on the subset of keyframes.

The invention relates to navigation, particularly, to detection of indoor and outdoor positions of mobile devices. Technical result of the invention is to improve the accuracy of mobile terminal position detection at time of occurrence of a specific trigger event and decrease of load on sensor, computing, communication and other resources of the mobile terminal at times when a trigger event occurs. Mobile terminal positioning technique at the trigger event moment, is characterized by the following sequence: receipt of series of readings of inertial and non-inertial sensors, identification of intervals, during which readings of at least one sensor generates a stationary process; then detection of at least one point of time, when at least one stationary process is replaced by another stationary process; then identification of parameters of at least one pattern of movement for at least one stationarity interval; then detection of at least one position of the mobile terminal according to readings of non-inertial sensors; estimation of mobile terminal path according to parameters of at least one pattern of movement and then of position corresponding to change of one stationary process to another; then detection of mobile terminal position at time corresponding to a specific trigger event.

A method, apparatus, and terminal for obtaining a route are provided, including techniques and related apparatus for: obtaining, by a terminal, a first moment at which a signal in the terminal disappears and first location information of the terminal at the first moment, and performing dead reckoning starting from the first moment; obtaining, by the terminal, a second moment at which a user sends a distress signal and second location information of the terminal at the second moment, and ending the dead reckoning, to obtain a first dead reckoning curve; and determining, by the terminal, a track of a traveled route based on the first moment, the second moment, the second location information, the first dead reckoning curve, and each moment between the first moment and the second moment.

A method for computing a correction to a compass heading for a portable device worn or carried by a user is described. The method involves determining a heading for the device based on a compass reading, collecting data from one or more sensors, determining if the device is indoors or outdoors based on the collected data, and correcting the heading based on the determination of whether the device is indoors or outdoors.

The present invention relates to an environmental coverage oriented motion system. The system includes a rangefinder module configured to measure a distance in real time; an odometry module configured to measure a velocity or a position in real time; a powered vehicle carrying the rangefinder module and the odometry module; and a controller module carried by the powered vehicle, configured to receive one of the distance, the velocity and the position, performing an environmental coverage oriented motion scheme based on one of the distance, the velocity and the position to select a plurality of positions, and commanding the powered vehicle to move among the plurality of positions.

A vehicle control system includes a vehicle positional information obtaining unit, a user terminal positional information obtaining unit, a relative distance recognizing unit recognizing a relative distance between a vehicle and a user terminal based on vehicle positional information and user terminal positional information, a wide-area wireless communication control unit controlling implementation of the wide-area wireless communication in the vehicle, and a narrow-area wireless communication control unit controlling implementation of the narrow-area wireless communication in the vehicle and, if the relative distance is longer than or equal to a first determination distance set based on a communicable distance of the narrow-area wireless communication, restricting implementation of the narrow-area wireless communication in the vehicle.

Examples of systems and methods for locating movable objects such as carts (e.g., shopping carts) are disclosed. Such systems and methods can use dead reckoning techniques to estimate the current position of the movable object. Various techniques for improving accuracy of position estimates are disclosed, including compensation for various error sources involving the use of magnetometer and accelerometer, and using vibration analysis to derive wheel rotation rates. Also disclosed are various techniques to utilize characteristics of the operating environment in conjunction with or in lieu of dead reckoning techniques, including characteristic of environment such as ground texture, availability of signals from radio frequency (RF) transmitters including precision fix sources. Such systems and methods can be applied in both indoor and outdoor settings and in retail or warehouse settings.

The present invention relates to an environmental coverage oriented motion system. The system includes a rangefinder module configured to measure a distance in real time; an odometry module configured to measure a velocity or a position in real time; a powered vehicle carrying the rangefinder module and the odometry module; and a controller module carried by the powered vehicle, configured to receive one of the distance, the velocity and the position, performing an environmental coverage oriented motion scheme based on one of the distance, the velocity and the position to select a plurality of positions, and commanding the powered vehicle to move among the plurality of positions.

Recent decades have brought tremendous advances in communication systems which have given rise to the global proliferation of smartphones and other mobile communication systems. A signal processing system implements technical solutions for determining building footprints from inputs including signal data associated with mobile communication devices.