An unmanned aerial vehicle includes one or more magnetometers, configured to detect a magnetic field and to output magnetometer data corresponding to a magnitude of the detected magnetic field; a position sensor, configured to detect a position of the unmanned aerial vehicle relative to one or more reference points, and to output position sensor data representing the detected position; one or more processors, configured to control the unmanned aerial vehicle to rotate about its z-axis; receive magnetometer data comprising a plurality of z-axis directional measurements taken during the rotation about the z-axis; receive position sensor data and determine from at least the position sensor data a magnetic field inclination of the detected position; and determine a z-axis magnetometer correction value as a difference between the received magnetometer data for the z-axis and the determined magnetic field inclination.

An unmanned aerial vehicle includes one or more magnetometers, configured to detect a magnetic field and to output magnetometer data corresponding to a magnitude of the detected magnetic field; a position sensor, configured to detect a position of the unmanned aerial vehicle relative to one or more reference points, and to output position sensor data representing the detected position; one or more processors, configured to control the unmanned aerial vehicle to rotate about its z-axis; receive magnetometer data comprising a plurality of z-axis directional measurements taken during the rotation about the z-axis; receive position sensor data and determine from at least the position sensor data a magnetic field inclination of the detected position; and determine a z-axis magnetometer correction value as a difference between the received magnetometer data for the z-axis and the determined magnetic field inclination.

A mouth guard senses impact forces and determines if the forces exceed an impact threshold. If so, the mouth guard notifies the user of the risk for injury by haptic feedback, vibratory feedback, and/or audible feedback. The mouth guard system may also remotely communicate the status of risk and the potential injury. The mouth guard uses a local memory device to store impact thresholds based on personal biometric information obtained from the user and compares the sensed forces relative to those threshold values. The mouth guard and its electrical components on the printed circuit board are custom manufactured for the user such that the mouth guard provides a comfortable and reliable fit, while ensuring exceptional performance.

A mouth guard senses impact forces and determines if the forces exceed an impact threshold. If so, the mouth guard notifies the user of the risk for injury by haptic feedback, vibratory feedback, and/or audible feedback. The mouth guard system may also remotely communicate the status of risk and the potential injury. The mouth guard uses a local memory device to store impact thresholds based on personal biometric information obtained from the user and compares the sensed forces relative to those threshold values. The mouth guard and its electrical components on the printed circuit board are custom manufactured for the user such that the mouth guard provides a comfortable and reliable fit, while ensuring exceptional performance.

An electronic device displays a compass user interface with a direction indicator and a bearing indicator. The direction indicator provides an indication of a respective compass direction, wherein the appearance of the direction indicator is determined based on the orientation of the electronic device relative to the respective compass direction. The bearing indicator provides an indication of an offset from the respective compass direction. While displaying the bearing indicator, the electronic device detects rotation of the rotatable input mechanism and, in response, changes the displayed position of the bearing indicator from a first position to a second position by an amount that is determined in accordance with a magnitude of the rotation of the rotatable input mechanism.

The present invention disclose an information processing method and a mobile device. The mobile device includes a device body and a magnetic adjustment mechanism, where the magnetic adjustment mechanism includes a magnetic adjustment member and a magnetic sensor, and the magnetic adjustment member is adjusted to enable the magnetic sensor to generate a pulse signal; and the device body further includes a processor and a display screen, and the processor receives the pulse signal generated by the magnetic adjustment mechanism, processes the pulse signal, and then displays adjusted content by using the display screen. This avoids a problem that adjustment cannot be conveniently performed because a display screen is covered by a finger when an operation is performed directly on the display screen.

The present invention disclose an information processing method and a mobile device. The mobile device includes a device body and a magnetic adjustment mechanism, where the magnetic adjustment mechanism includes a magnetic adjustment member and a magnetic sensor, and the magnetic adjustment member is adjusted to enable the magnetic sensor to generate a pulse signal; and the device body further includes a processor and a display screen, and the processor receives the pulse signal generated by the magnetic adjustment mechanism, processes the pulse signal, and then displays adjusted content by using the display screen. This avoids a problem that adjustment cannot be conveniently performed because a display screen is covered by a finger when an operation is performed directly on the display screen.

In general, the subject matter described in this disclosure can be embodied in methods, systems, and program products for receiving an indication that a vehicle has begun accelerating from a stationary state. A computing system sets, in response to having received the indication that the vehicle has begun accelerating from the stationary state, an orientation value generated using a gyroscope to a default orientation value. The computing system repeatedly updates the orientation value generated using the gyroscope, based on changes in gyroscope orientation that occurred after the computing system set the orientation value to the default orientation value. The computing system determines that the updated orientation value satisfies criteria that indicates that the vehicle is likely to encounter or has encountered a dangerous situation. The computing system outputs a signal to cause the vehicle to employ a safety measure.

In general, the subject matter described in this disclosure can be embodied in methods, systems, and program products for receiving an indication that a vehicle has begun accelerating from a stationary state. A computing system sets, in response to having received the indication that the vehicle has begun accelerating from the stationary state, an orientation value generated using a gyroscope to a default orientation value. The computing system repeatedly updates the orientation value generated using the gyroscope, based on changes in gyroscope orientation that occurred after the computing system set the orientation value to the default orientation value. The computing system determines that the updated orientation value satisfies criteria that indicates that the vehicle is likely to encounter or has encountered a dangerous situation. The computing system outputs a signal to cause the vehicle to employ a safety measure.

Disclosed is an electronic device comprising: a gyro sensor; an acceleration sensor for outputting acceleration data about motion of the electronic device; a geomagnetic sensor for outputting geomagnetic data about a magnetic field around the electronic device; and a low-power processor electrically connected to the gyro sensor, the acceleration sensor and the geomagnetic sensor. The low-power processor: operates the acceleration sensor while the gyro sensor is deactivated to determine a motion pattern of the electronic device; drives the geomagnetic sensor to acquire geomagnetic data such that, if the motion of the electronic device corresponds to a predetermined first motion pattern, the geomagnetic data is acquired at a first sample rate, and, if the motion corresponds to a predetermined second motion pattern, the geomagnetic data is acquired at a second sample rate higher than the first sample rate; and calibrates the geomagnetic sensor on the basis of the geomagnetic data.