C900-B 80° Tilt Compensation 3D Electronic Compass Single Board, High Precision Digital Output

A: The compass uses a 3-axis magnetometer to measure Earths magnetic field vectors (Hx, Hy, Hz). By comparing these vectors to a predefined magnetic model, it computes the azimuth angle relative to magnetic north. Tilt compensation (via accelerometer data) corrects for roll/pitch angles, ensuring accuracy even when the sensor is non-horizontal. This is critical for applications like marine navigation or industrial automation where precise orientation is essential.

A: Magnetic north aligns with Earths magnetic field, while true north is the geographic North Pole. The compass includes a declination adjustment feature to map magnetic north to true north, ensuring compatibility with global navigation systems. This is vital for geographically precise tasks like surveying or autonomous vehicle path planning.

A: Tilt (roll/pitch) distorts magnetic field measurements by altering the vertical component (Hz). The compass uses an accelerometer to detect tilt angles and adjust the magnetic field vectors, maintaining accuracy even on inclined surfaces (e.g., ship decks, robotic arms). Pre-calibration and real-time tilt correction ensure stable output across 90 roll/pitch.

A: Hard iron (permanent magnet) interference is corrected by measuring static offset fields, while soft iron (ferromagnetic material) is addressed by modeling dynamic distortions. Use automatic omnidirectional calibration (full rotation for complex fields), manual calibration (selective sampling), or plane calibration (small tilt) to compensate. Save calibration data to flash memory for retention. This is essential for environments with motors, steel structures, or metal casings.

A: Yes, but maintain 10cm distance from motors, power lines, or steel casings to avoid interference. Post-installation calibration (hard/soft iron) is critical to compensate for residual fields. For example, in factory automation, this ensures stable heading data near conveyor belts or machinery.