Systems and methods are presented for establishing a communication link between two or more electronic devices. A portable eyewear electronic device is configured to communicate with a handheld electronic device, such as a ring, that in turn is retained by an accessory electronic device to establish a wired communication link. The accessory electronic device may be retained or housed by a second accessory electronic device, such as a remote control or wearable device.

An apparatus and a method for refining a geographical location based on dynamic characteristics of a helmet are disclosed. A piece of angular velocity information is sensed through a gyroscope and then compared with a piece of basic angular velocity information to generate a piece of dynamic information of the helmet body. The piece of dynamic information, the piece of location information, and the piece of magnetic flux information are marked on an electronic map to generate a piece of refined geographical location information which is then sent to an output unit to be outputted. Thus, a higher resolution of the current geographical location is obtained.

An apparatus and a method for refining a geographical location based on dynamic characteristics of a helmet are disclosed. A piece of angular velocity information is sensed through a gyroscope and then compared with a piece of basic angular velocity information to generate a piece of dynamic information of the helmet body. The piece of dynamic information, the piece of location information, and the piece of magnetic flux information are marked on an electronic map to generate a piece of refined geographical location information which is then sent to an output unit to be outputted. Thus, a higher resolution of the current geographical location is obtained.

A position determination device comprises data input circuitry configured to obtain magnetic field sensor data sensed by a magnetic field sensor, separation circuitry configured to separate the obtained magnetic sensor data into low frequency sensor data including frequencies below a frequency threshold and high frequency sensor data including frequencies above the frequency threshold, fingerprint combining circuitry configured to determine a combined magnetic fingerprint based on the low frequency sensor data and the high frequency sensor data, and position determination circuitry configured to determine the sensor position of the magnetic field sensor by comparing the combined magnetic fingerprint with a magnetic map.

A position determination device comprises data input circuitry configured to obtain magnetic field sensor data sensed by a magnetic field sensor, separation circuitry configured to separate the obtained magnetic sensor data into low frequency sensor data including frequencies below a frequency threshold and high frequency sensor data including frequencies above the frequency threshold, fingerprint combining circuitry configured to determine a combined magnetic fingerprint based on the low frequency sensor data and the high frequency sensor data, and position determination circuitry configured to determine the sensor position of the magnetic field sensor by comparing the combined magnetic fingerprint with a magnetic map.

There is provided a mobile device comprising a geomagnetic sensor configured to detect a geomagnetic value, and at least one controller configured to perform a notification for a user using a predetermined device when it determines that a pattern of a change of the geomagnetic value matches with a predetermined geomagnetic pattern.

There is provided a mobile device comprising a geomagnetic sensor configured to detect a geomagnetic value, and at least one controller configured to perform a notification for a user using a predetermined device when it determines that a pattern of a change of the geomagnetic value matches with a predetermined geomagnetic pattern.

A geopositioning system. The geopositioning system includes an accelerometer including three sensing axes, a gyroscope including three sensing axes, and a magnetometer including three sensing axes, and a processing circuit. The processing circuit is configured to calculate a location of the geopositioning system as a latitude, longitude, and altitude with respect to the Earth.

A geopositioning system. The geopositioning system includes an accelerometer including three sensing axes, a gyroscope including three sensing axes, and a magnetometer including three sensing axes, and a processing circuit. The processing circuit is configured to calculate a location of the geopositioning system as a latitude, longitude, and altitude with respect to the Earth.

In an apparatus and method for controlling operation of a utility vehicle that detects a magnetic field generated by an area signal in electric current supplied from an electric power supply through a boundary wire and is driven by an electric motor powered by an onboard battery that is charged at a charging station. The vehicle runs within the working area based on the detected magnetic field and is provided with a socket to connect/disconnect supply of the electric current to the boundary wire. It is determined whether after power supply was once disconnected, the supply is reconnected. The area signal is inserted with a signal indicating the vehicle to return to the charging station when the power supply is reconnected. Operation of the motor is controlled to make the vehicle run to the charging station when the return instruction signal is inserted to the area signal.