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Development and Application of a High-Precision Portable Digital Compass System for Improving Combined Navigation
Songhao Zhang1, Min Cui1, Peng Zhang1
1School of Instrument and Electronics, North University of China, Taiyuan 030051, China.
Sensors (Basel, Switzerland)
|April 27, 2024
Summary
A new portable digital compass using tunnel magnetoresistance (TMR) sensors significantly improves combined navigation systems (CNS). This high-precision device enhances accuracy and stability, especially in challenging environments like tunnels.
Area of Science:
- Navigation Systems
- Sensor Technology
- Geophysics
Background:
- Limited availability of high-precision, portable digital compasses hinders combined navigation system (CNS) performance.
- A lack of published research exists on advanced portable digital compass solutions.
Purpose of the Study:
- To design a high-precision portable digital compass system utilizing tunnel magnetoresistance (TMR) sensors.
- To enhance the accuracy and stability of combined navigation systems (CNS).
Main Methods:
- Ellipsoid fitting method to correct manufacturing and installation errors.
- Least-squares method for compensating compass inaccuracy.
- Utilizing digital compass direction angle data to offset CNS errors.
Main Results:
- Azimuth accuracy improved from 4.1824° to 0.4580° after error compensation.
- The CNS path demonstrated increased accuracy and proximity to the reference route.
- Enhanced stability of the CNS path, particularly within tunnel environments.
Conclusions:
- The developed TMR sensor-based digital compass system effectively boosts the accuracy and stability of integrated navigation systems.
- This approach offers a viable solution for improving overall CNS performance, especially in navigation-critical applications.
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