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Electronic Compass Application Notes

1. Planning - product planning, specification, component selection

　　・What is a Geomagnetic field

　　・Quantitative understanding of azimuth accuracy

　　・Product specification, data sheet

　　・Sample, EVK program

2. Hardware design - hardware layout for electronic compass products

　　・Main obstacles to electronic compass precision

　　・Measurement of product's magnetic field distribution

3. Software Design

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AMI306 driver/software specificaiton(PDF) Japanese Version
AMIXXX_DeviceDriver_Specifications_1.3.0
PDFファイル 182.3 KB
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AMI306 Driver software Specification(PDF) English Version
Generic_AMIXXX_DeviceDriver_Specificatio
PDFファイル 140.7 KB
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AMI603 driver/software specification(PDF) Japanese Version
Generic_AMI6XX_DeviceDriver_Specificatio
PDFファイル 197.7 KB
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AMI603 Driver software Specification(PDF) English Version
Generic_AMI6XX_DeviceDriver_Specificatio
PDFファイル 155.0 KB
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AMI305 driver software specification and driver download(Japanese and English)
Generic_ami305_device_driver_20140320.zi
zip ( 圧縮 ) ファイル 289.7 KB
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AMI306 driver download
Generic_ami306_device_driver_20130717.zi
zip ( 圧縮 ) ファイル 291.5 KB
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AMI603 driver download
Generic_ami603_device_driver_20130717.zi
zip ( 圧縮 ) ファイル 299.9 KB
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Process for calibrating the electric compass

 

　・The magnetic sensor's magnetic accuracy and the compass's azimuth accuracy

　・General information on the calibration of magnetic sensors

　・Principles of magnetic sensor calibration

　・Foundations of azimuth calculation

　・Tilt compensation for azimuth calculation

　・Tilt compensation for azimuth calculation is impossible without an accelerometer

　・Magnetic declination correction for electric compass

　・Attitude calculation

　・Method for converting a sensor's measured value to a magnetic field

　・Method for converting a digital-type magnetic sensor's measured value to a magnetic field

　・List of principles for compass calibration

　・Orthogonal correction in magnetic sensor

　・Search offset

 

4. test/calibration/trouble shooting 

　・Method for testing the electric compass

　・Test for Android devices with an onboard electric compass

　・Causes of obstacles in electric compass accuracy

　・Product datasheet

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