Tunneling magnetoresistive angle sensor based on arctangent algorithm

RUAN Yi; JIN Li; JING Ning; XIE Kunyang; LI Mengwei

Chinese

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Tunneling magnetoresistive angle sensor based on arctangent algorithm

Research & Approach | 更新时间：2026-03-01

- Tunneling magnetoresistive angle sensor based on arctangent algorithm
- Vol. 45, Issue 2, Pages: 55-59(2026)
- 作者机构：
  
  1. 中北大学仪器与电子学院,山西,太原,030051
  2. 中北大学前沿交叉科学研究院,山西,太原,030051
  3. 3.中北大学信息与通信工程学院,山西,太原,030051
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP212
- Published：2026
- 稿件说明：
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RUAN Yi, JIN Li, JING Ning, et al. Tunneling magnetoresistive angle sensor based on arctangent algorithm[J]. 2026, 45(2): 55-59.
DOI：

RUAN Yi, JIN Li, JING Ning, et al. Tunneling magnetoresistive angle sensor based on arctangent algorithm[J]. 2026, 45(2): 55-59. DOI：

摘要

基于反正切细分算法，提出一种高分辨率隧道磁阻（TMR）效应角度测量方案。介绍了TMR效应角度传感器结构及测量原理，并通过COMSOL 仿真软件对多级磁环周围磁场分布情况进行了仿真研究，分析了磁环磁极对数与测量距离对磁环磁场强度的影响程度。此外，详细介绍了结合基于反正切算法的角位移信号处理模块，并对多级磁环结构TMR角度传感器进行了测试。测试结果表明:该方法能够实现对TMR 输出信号的千倍细分，角度分辨率可达0.09°，验证了所提出方案的可行性。

Abstract

Based on arctangent subdivision algorithm

a high-resolution angle measurement scheme using the tunneling magnetoresistance(TMR)effect is proposed.The structure and measurement principle of the TMR effect-based angle sensor are introduced.The magnetic field distribution around the multi-stage magnetic ring is simulated using COMSOL software

and the influences of the number of the magnetic pole pairs and measurement distance on the magnetic field strength are analyzed.In addition

the signal processing module of angular displacement based on the arctangent algorithm is introduced in detail

and the TMR angle sensor based on the multi-stage magnetic ring is tested.Test results show that the method can realize the thousand-fold subdivision of the TMR output signal

and the angular resolution can reach 0.09°

which verifies the feasibility of the proposed scheme.

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