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  • Achieving Highest System Angle Sensing Accuracy

    • SBAA539A march   2022  – may 2023 TMAG5170 , TMAG5170-Q1 , TMAG5170D-Q1 , TMAG5173-Q1 , TMAG5273

       

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  • Achieving Highest System Angle Sensing Accuracy
  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Magnet Selection
    1. 2.1 Placement Considerations
    2. 2.2 Magnet Properties
  6. 3Measurement Non-Linearity
  7. 4Mechanical Error Sources
  8. 5Signal Chain Errors
  9. 6Calibration Methods
  10. 7Revision History
  11. IMPORTANT NOTICE
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Application Note

Achieving Highest System Angle Sensing Accuracy

Abstract

Motor controlled systems that require precise angle feedback are abundant across many application settings. For instance, autonomous mobile robots (for example, vacuum cleaners, lawnmowers, or warehouse transports) rely on accurate feedback to properly guide the machine to its intended location. Additionally, manufacturing 6-axis robotic arms and collaborative robits (cobots) require precise control to ensure exactness is assembly for improved throughput and optimal quality. In all systems, mechanical alignment tolerances and signal chain factors will contribute to observed measured angle error for magnetic sensors. This report will discuss magnet selection, sensor placement, and how these electrical and mechanical error sources impact measurement. Finally, processes for calibrating angle error will be presented to show how to achieve the optimal angle accuracy for any system.

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