DEVELOPMENT OF A COMPREHENSIVE GEOMAGNETIC MEASUREMENT DEVICE

This device was developed using a project-based learning approach, with the goal of accurately measuring weak geomagnetic fields. We independently designed a measuring instrument, starting with the Gaussian method, to conduct preliminary measurements of the horizontal component of the geomagnetic field. Then, we improved the Gaussian method using a self-made Helmholtz double coil. Finally, based on the communication between a LabVIEW host computer and an Arduino microcontroller, a photoelectric probe detection system was established, enabling efficient and convenient data transmission and processing, as well as higher measurement accuracy. Additionally, we independently designed a Hall-Gauss meter to measure the vertical component of the geomagnetic field using the flipping method. To adapt to the diversity of magnetic field measurement scenarios, we used a STM32 microcontroller to make a self-made AMR Gauss meter and independently wrote hard magnetic correction and tilt compensation algorithms to replace the Kalman filter algorithm. This instrument is characterized by low cost, good interactivity, portability, high accuracy, and can be applied to a wider range of application scenarios.