| 摘要 |
A device for determining azimuth comprising a MEMS Inertial measurement unit (IMU), a GPS system and a processor configured to receive data from said IMU and from said GPS system, said processor being configured to derive a true north reference. The device may be handheld and may be moved in an oscillatory or periodic manner and may further be inverted. The two systems IMU and GPS may be rigidly connected at a distance of less than 5cm. The MEMS IMU may comprise a 6 degrees of freedom unit, 3 accelerometers or 3 gyroscopes. The device may be encased in a shockproof material which may be a synthetic resin. |
