Application of MEMS Accelerometer in North Finder

The high-precision north seeker is mainly composed of closed-loop fiber optical gyroscope, which can independently determine the true north direction value of the attached carrier by measuring the earth's rotation angle velocity, and is not disturbed and affected by the external magnetic field or other environment. In addition, it can also measure and correct the horizontal angle in combination with the acceleration. It is mainly used in the fields of drilling director, drilling equipment control, ocean survey, three-dimensional scanner, radar, antenna, military vehicles and so on.

It is mainly used to quickly and independently determine the true north direction. After obtaining the azimuth angle, the equipment starts to move and can continuously output the changing dynamic inclination and azimuth angle. MEMS gyroscope is used for north seeking and built-in IMU is used for inclination measurement and azimuth estimation. It has the characteristics of small size, low price, low power consumption, long service life and high reliability.

MEMS gyroscope, accelerometer, mechanical rotation device and signal solving circuit are composed. The micro gyroscope north finder uses the rate gyroscope to measure the rotation speed of the earth, so as to calculate the azimuth. The product collects the output of the gyroscope under different azimuth angles, and carries out signal processing to calculate the azimuth of the equipment.

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Among them, IMU's inertial measurement unit is an important part of which the internal MEMS Accelerometer is also one of the components of IMU inertial measurement unit, which is mainly used as the acceleration in three directions of xyz axis, so as to cooperate with gyroscope and calculate the correct angle required by north finder.

Dynamic gyro north finder is a gyroscope that uses strapdown compass effect to solve true north direction.

The dynamic gyro north finder is composed of three-axis dynamically adjustable gyro, three-axis plus meter, data acquisition and processing module, secondary power supply, optocoupler isolated input and output serial port circuit and other related structural parts. After power on and startup, the product enters the preheating time. After the preheating time, the product turns into initial self-alignment under the condition of moving base. After the north finder is powered on for 30 minutes, the aircraft carrying the product can sail at sea.

The dynamic gyro north finder is mainly used in navigation. When sailing, the dynamic gyro north finder will timely output the heading angle, roll angle and pitch angle.

Ericco provides north finding system solutions. We have fog and MEMS north seeker, If you have any needs, please feel free to contact us.