基于FPGA的TMR弱电流传感器的高精度温度补偿方法
Jie Wu1,2, Ke Zhou3, Qingren Jin3
1State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China.
Micromachines
|January 8, 2025
概括
这项研究开发了一种基于软件的温度补偿方法,用于道磁电阻 (TMR) 传感器,提高其在智能电网中的准确性. 增强的TMR传感器有效地检测到弱电流,即使在不同的温度.
科学领域:
- 电气工程 电气工程
- 材料科学 材料科学 材料科学
- 传感器技术 传感器技术
背景情况:
- 道磁阻 (TMR) 传感器为检测弱电流提供了高灵敏度,这对于智能电网至关重要.
- 温度波动大大降低了TMR传感器的准确性,限制了它们的现实应用.
- 现有的补偿方法可能无法完全解决TMR传感器中温度依赖的错误.
研究的目的:
- 研究温度变化对TMR传感器测量精度的影响.
- 为TMR传感器提出并验证一种高精度,基于软件的温度补偿方法.
- 提高TMR传感器的可靠性,以在各种热条件下在智能电网中检测弱电流.
主要方法:
- 分析TMR传感器的操作原理和温度特征.
- 开发一种补偿算法,结合立方线插值,多项式回归和零点自我校准.
- 基于现场可编程门阵列 (FPGA) 的补偿电路的实施和实验评估.
主要成果:
- 拟议的补偿方法显著改善了TMR传感器的温度稳定性.
- 观察到灵敏度温度漂移系数显著降低,并且改善了零点漂移稳定性.
- 与其他补偿技术相比,补偿的TMR传感器表现出更高的性能.
结论:
- 开发的基于软件的温度补偿方法有效地减轻TMR传感器中温度引起的错误.
- 增强的TMR传感器在复杂的温度环境中表现出更高的准确性和稳定性.
- 这一进步使智能电网应用在各种条件下能够更可靠地检测弱电流.
相关概念视频
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01:25Instrumentation Amplifier
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