Analysis Of Strapdown North Finder Data Acquisition - China

With the development of inertial technology, strap-down north finder has become the main trend of development because of its speed, high reliability, no need to provide geographical location information and simple structure.

North finder plays an important role in military applications such as missile launching and artillery aiming.

In practical engineering applications, the operating latitude of the north finder is from 53° South to 53° north.

In the range of Earth latitude 0° ~ 53°, the north component of the earth's rotation angular velocity varies greatly, and the amplitude of the gyroscope output signal will have a large difference.

When the sampling resistance of the signal acquisition system is fixed, the gyro data fitting curves are different in different geographical latitudes, and some geographical latitude data fitting curves will lead to data loss, which will have a certain impact on north finding.

1 - The overall design of strap-downnorth finding system The strap-down north seeking system is composed of data acquisition and processing system, turntable leveling system (inclinometer), rotation control system (servo unit), inertial measurement system (fiber optic gyro and accelerometer), temperature control system (temperature control unit), etc.

The data acquisition and processing system is composed of signal acquisition module, signal processing module, data display module and data communication module, which is the central processing core of the north finder, mainly realizing the function of data acquisition and processing and calculating the north seeking angle.

The signal acquisition module converts the current signal output by the gyro into voltage signal, and then converts it into digital signal through A/D.

The signal processing module performs digital filtering on the gyro data, processes the gyro data and encoder data of multiple transposition positions, and calculates the north seeking angle.

The data display module displays the working state and north seeking angle data of the north finder; Data communication module communicates with servo control unit, temperature control unit, electronic inclinometer, encoder and host computer through serial port, and sends and receives data.

The full knowledge can be seen at Ericcointernational company.

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• Posted By: ericcoinertialsystem

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• Address: 高新, 瑞鑫大厦, xi'an , Shaanxi , China

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• Business Description: Ericco, established in 2006, is a group corporation in China and specializes in R & D and manufacture of all kinds of inertial sensors and inertial positioning / orientating / navigation / attitude measuring systems, such as MEMS gyroscope, FOG gyroscope, Liquid Floating Gyroscope, Quartz Accelerometer, MEMS Accelerometer, North Finder, IMU, INS, AHRS, etc., which are widely applied in many different industries including Aviation / Aerospace / Weapon / Ship / Electronics / Petroleum / Gas / Mining and so on.
  
  After fifteen years of development, Ericco has successfully served clients from more than 50 countries, and provided clients with excellent standard products and customized solutions for the applications of North seeking, Positioning and Orientating, Navigation, Attitude Measuring & Control, Oil & Gas downhole exploitation.