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How to use high precision electronic compass in accurate navigation?

Views:13     Author:Site Editor     Publish Time: 2021-03-08      Origin:Site Inquire

Electronic compass is widely used in various navigation instruments and attitude sensors in aerospace system as a common equipment for azimuth measurement and flight attitude monitoring. The measurement accuracy directly affects the performance of the system.Therefore, the high-precision electronic compass plays a very important role in the field of precise positioning and navigation systems such as aviation, aerospace, robot, navigation and vehicle autonomous navigation and has a broad market prospect.

Electronic Compass

When it comes to the electronic compass, we have to mention the traditional compass.

As early as more than two thousand years ago, our people have used lodestones to indicate the direction, which is the traditional compass.With the continuous development of society and the progress of science and technology, the traditional compass has been improved into an electronic compass that uses a reluctance sensor to realize the directional positioning function, which can convert the measured data into electronic signals. It has the advantages of small size, light weight, low power consumption and high precision.On this basis, the high-precision electronic compass has better accuracy than the general electronic compass, which is of better help to improve the performance of the system.

Characteristics of high precision electronic compass

The high-precision electronic compass uses A three-axis magnetoresistor effect sensor to measure the plane geomagnetic field, and A biaxial dip Angle to compensate. It has high-speed and high-precision A/D conversion.In order to minimize the error caused by the temperature drift of the tilt Angle and the pointing Angle, the internal temperature compensation device is also equipped.In addition, the high precision electronic compass has the characteristics of small size, light weight, low power consumption, impact resistance and can compensate for stray magnetic field.

Classification of high precision electronic compasses

  • The principle of the electronic compass is to use the magnetoresistance sensor to measure the geomagnetic field. No matter when, the horizontal component of the direction of the earth's magnetic field always points to the magnetic North Pole. Therefore, there can be different sensor combinations to determine the direction with the electronic compass system.High precision electronic compass can be divided into three axis magnetic sensor biaxial inclination sensor system and three axis magnetic sensor triaxial inclination sensor system.The biaxial inclination sensor system consists of three magnetic sensors to form the X, Y and Z axis magnetic system, plus the biaxial inclination sensor to compensate the inclination.Tri-axis magnetic sensor Tri-axis magnetic sensor system is composed of three magnetic sensors X, Y and Z axis magnetic system, plus the tri-axis inclination sensor, namely acceleration sensor, for inclination compensation.These two kinds of high precision electronic compass systems can measure the pitch Angle and roller Angle in addition to the navigation, which can meet the requirements of high precision direction and attitude display.


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