The fiber optic gyro north finder is an inertial product with a gyroscope as its core component. Fiber optic gyroscope is a kind of gyroscope with simple structure and easy to be mass-produced. Its development is based on low-loss optical fibers and small and reliable semiconductor light sources. It is an interferometer composed of optical fibers and is a static gyroscope. Its main advantages are: 1. It uses solid-state devices, no moving parts, and the instrument is firm and stable. ②Long continuous working time. ③Long life, low power consumption, stable and reliable signal. Precisely because of the advantages of fiber optic gyroscopes that are different from other traditional gyroscopes, many domestic and foreign research institutions attach great importance to the development of fiber optic gyroscope north finders. Therefore, they have a broad application market and high research value.
Application fields of fiber optic gyro north finder:
Drilling field: The north azimuth angle is an important attitude angle reference datum for the drilling rig and an important parameter to achieve precise operation of the drilling rig. Since there is no GPS-assisted north direction information in coal mines, and geomagnetic information cannot be used to find north due to ferromagnetic interference, a north seeker is the best solution to achieve rapid and accurate north search by using fiber optic gyroscopes that are sensitive to the earth's rotation component. The fiber optic gyroscope has strong anti-interference ability and large measurement range. It is the core component of the north seeking device and is very suitable for use in drilling and mining operations.
Radar: System north seeking is an essential function of the radar system. The north seeker is mainly used to automatically measure the angle between the normal line of the radar antenna and true north when moving positions. The prerequisite for realizing this function is that the pointing of the north finder should be parallel to the normal line of the radar antenna. However, in actual use, it is impossible to achieve complete parallelism between the north-seeking direction and the antenna normal. There is a fixed error between the two, which must be eliminated through azimuth calibration.
UAV ground station calibration： The UAV ground station needs to complete the functions of remote control, telemetry, positioning and tracking of the UAV. The north seeker uses a gyroscope to sense the angular velocity of the earth's rotation and calculate the angle between the longitudinal axis of the carrier and the north direction to achieve the north seeking function. Install the north seeker horizontally on the ground station cabin. The north direction of the north finding device is parallel to the longitudinal axis of the cabin. In the stationary state, the north seeking equipment can calculate the angle between the longitudinal axis of the cabin and true north, which is the initial azimuth angle.
In addition, FOG north seekers can also be used in modern land weapons and equipment. Inertial north seekers with gyroscopes as the main sensor are important equipment in modern warfare to ensure accurate weapon strikes. High-precision orientation is a prerequisite for the strike accuracy of modern land weapons, especially land-based long-range weapons. Orientation accuracy is an important factor in ensuring the lethality of weapons within the range. As one of the important achievements in the application of inertial technology, the gyro north finding device has high orientation accuracy, short measurement time, and is not restricted by climatic conditions. It can measure orientation all-weather and autonomously without relying on any external information. It is a high-precision orientation benchmark system's preferred device.
In addition to the fields mentioned above, the north seeker is also suitable for application in orientation and positioning in railway train systems, direction pointing and tracking in target tracking systems, precision attitude and position measurement in navigation-grade MEMS IMU/INS, geodetic north-seeking positioning in surveying/land mobile surveying and mapping systems, bridges, high-rise buildings, towers, dam monitoring and other fields.
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