An electronic device is provided. The electronic device includes a magnetic sensor, an acceleration sensor, and a processor operatively connected to the magnetic sensor and the acceleration sensor, wherein the processor is configured to acquire multiple pieces of first magnetic data by using the magnetic sensor in a first area where the electronic device is located, generate a virtual marker corresponding to the first area by using the multiple pieces of first magnetic data, determine the movement of the electronic device on the basis of multiple pieces of first acceleration data in a first direction, the data being acquired by using the acceleration sensor, determine the posture of the electronic device on the basis of multiple pieces of second acceleration data in a second direction that is perpendicular to the first direction, the data being acquired by using the acceleration sensor, and determine, on the basis of at least one of the movement of the electronic device and the posture of the electronic device, multiple pieces of third magnetic data to be used for comparison with the virtual marker, among multiple pieces of second magnetic data acquired within a designated radius with reference to the first area by using the magnetic sensor.

Audio speaker angular determination is made using sensor fusion technology involving an accelerometer, gyroscope, and magnetometer (compass). All speakers in an audio system use their magnetometers to determine their orientation relative to magnetic north. A group owner (typically the center channel or sound bar) gathers the orientation information from all speakers in the system. The group owner determines the angle of orientation of all speakers relative to its own orientation. Changes in angular orientation are sensed by the gyroscopes. For example, during calibration, the user can be told to rotate a certain speaker in the system, and the gyroscope measures the change and reports to the group owner. An indication is presented as to whether the new angle is good, or more is required. The gyroscope in combination with the accelerometer senses changes of angular orientation to aim height speakers downward towards the listening position or bottom speakers upward.

Audio speaker angular determination is made using sensor fusion technology involving an accelerometer, gyroscope, and magnetometer (compass). All speakers in an audio system use their magnetometers to determine their orientation relative to magnetic north. A group owner (typically the center channel or sound bar) gathers the orientation information from all speakers in the system. The group owner determines the angle of orientation of all speakers relative to its own orientation. Changes in angular orientation are sensed by the gyroscopes. For example, during calibration, the user can be told to rotate a certain speaker in the system, and the gyroscope measures the change and reports to the group owner. An indication is presented as to whether the new angle is good, or more is required. The gyroscope in combination with the accelerometer senses changes of angular orientation to aim height speakers downward towards the listening position or bottom speakers upward.

A geodetic levelling staff, a method for measuring a height with the geodetic levelling staff and a system including the geodetic levelling staff and a level are provided. The geodetic levelling staff includes a circular level that indicates whether the geodetic levelling staff is in a vertical position, a level detection unit for detecting a bubble position of the circular level, a control circuit that receives detected data performed by the level detection unit and transmits the detected data to a near field communication tool, the near field communication tool for performing a communication from the geodetic levelling staff to the level according to the detected data received from the control circuit, wherein the level operates according to the detected data received from the near field communication tool.

A system for finding up in a projectile flight relative to earth. The system having a transmitter which transmits polarized reference signals to a guidance sub-system on the projectile. The guidance sub-system includes a magnetometer and polarized and non-polarized receivers. Measurements from the magnetometer are used to determine a general up direction. The polarized and non-polarized receivers are arranged such that, during rotation of the projectile, reference signals received by the polarized receiver modulate whereas reference signals received by the non-polarized receivers are unaffected. A ratio of the strengths of the signals received by the polarized and non-polarized receivers determines alignment of a vertical axis. From the general up direction and alignment of the vertical axis, a precise up direction of the projectile in flight relative to the earth can be determined.

A system for finding up in a projectile flight relative to earth. The system having a transmitter which transmits polarized reference signals to a guidance sub-system on the projectile. The guidance sub-system includes a magnetometer and polarized and non-polarized receivers. Measurements from the magnetometer are used to determine a general up direction. The polarized and non-polarized receivers are arranged such that, during rotation of the projectile, reference signals received by the polarized receiver modulate whereas reference signals received by the non-polarized receivers are unaffected. A ratio of the strengths of the signals received by the polarized and non-polarized receivers determines alignment of a vertical axis. From the general up direction and alignment of the vertical axis, a precise up direction of the projectile in flight relative to the earth can be determined.

Audio speaker angular determination is made using sensor fusion technology involving an accelerometer, gyroscope, and magnetometer (compass). All speakers in an audio system use their magnetometers to determine their orientation relative to magnetic north. A group owner (typically the center channel or sound bar) gathers the orientation information from all speakers in the system. The group owner determines the angle of orientation of all speakers relative to its own orientation. Changes in angular orientation are sensed by the gyroscopes. For example, during calibration, the user can be told to rotate a certain speaker in the system, and the gyroscope measures the change and reports to the group owner. An indication is presented as to whether the new angle is good, or more is required. The gyroscope in combination with the accelerometer senses changes of angular orientation to aim height speakers downward towards the listening position or bottom speakers upward.

Audio speaker angular determination is made using sensor fusion technology involving an accelerometer, gyroscope, and magnetometer (compass). All speakers in an audio system use their magnetometers to determine their orientation relative to magnetic north. A group owner (typically the center channel or sound bar) gathers the orientation information from all speakers in the system. The group owner determines the angle of orientation of all speakers relative to its own orientation. Changes in angular orientation are sensed by the gyroscopes. For example, during calibration, the user can be told to rotate a certain speaker in the system, and the gyroscope measures the change and reports to the group owner. An indication is presented as to whether the new angle is good, or more is required. The gyroscope in combination with the accelerometer senses changes of angular orientation to aim height speakers downward towards the listening position or bottom speakers upward.

A system for finding up in a projectile flight relative to earth. The system having a transmitter which transmits polarized reference signals to a guidance sub-system on the projectile. The guidance sub-system includes a magnetometer and polarized and non-polarized receivers. Measurements from the magnetometer are used to determine a general up direction. The polarized and non-polarized receivers are arranged such that, during rotation of the projectile, reference signals received by the polarized receiver modulate whereas reference signals received by the non-polarized receivers are unaffected. A ratio of the strengths of the signals received by the polarized and non-polarized receivers determines alignment of a vertical axis. From the general up direction and alignment of the vertical axis, a precise up direction of the projectile in flight relative to the earth can be determined.

A system for finding up in a projectile flight relative to earth. The system having a transmitter which transmits polarized reference signals to a guidance sub-system on the projectile. The guidance sub-system includes a magnetometer and polarized and non-polarized receivers. Measurements from the magnetometer are used to determine a general up direction. The polarized and non-polarized receivers are arranged such that, during rotation of the projectile, reference signals received by the polarized receiver modulate whereas reference signals received by the non-polarized receivers are unaffected. A ratio of the strengths of the signals received by the polarized and non-polarized receivers determines alignment of a vertical axis. From the general up direction and alignment of the vertical axis, a precise up direction of the projectile in flight relative to the earth can be determined.