Prototyping of a 3-axis Accurate Magnetic Field Digital Measurement System Using a High-speed 24-bit ADC with Real-time Monitoring

Document Type : Original Article

Authors

Electrical and computer Department,International Imam Khomeini university of Qazvin,, Iran

Abstract

In this paper, a precise measurement system is designed and implemented to measure the magnetic field from a flux gate magnetic sensor. The design procedure includes the conceptual design, selection of sensitive sensors, high speed sampling compatible to the fluxgate sensors, data-loss free transfer, programming for data decode, analysis and presentation in graphs.  The proposed system uses low-noise 24-bit ADCs with 2.5MS/s sample rate, SPARTAN III FPGA and ARM Cortex M4 processor. The Levenberg–Marquardt algorithm and averaging algorithms are used in the software for calibration, compensation and data representation. The outstanding feature of this article is the development of a technology in precision magnetic field measurement systems, which are widely used as telemetry systems and subsystems of spacecrafts. An advantage of the proposed system is the high-speed sampling of flux gate sensor signals in 24-bit resolution, the precision of 182.5 µV and real-time transmission and display of this data on the computer. 

Keywords


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Volume 8, Issue 1 - Serial Number 20
September 2020
Pages 69-81
  • Receive Date: 21 December 2019
  • Revise Date: 07 February 2020
  • Accept Date: 14 June 2020
  • Publish Date: 22 August 2020