| 超高时空分辨率磁纳米测温前沿与进展 |
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| 引用本文： | 吴杰.超高时空分辨率磁纳米测温前沿与进展[J].实验流体力学,2022,36(2):1-8. |
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| 作者姓名： | 吴杰 |
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| 作者单位： | 华中科技大学 人工智能与自动化学院，武汉 430074 |
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| 基金项目： | 国家自然科学基金（61973132）；湖北省重点研发计划（2020BHB020） |
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| 摘 要： | 特殊条件下的远程、快速温度测量的前沿需求，对经典温度传感技术提出了挑战。磁学原理测温方法在这些领域颇具潜力，磁纳米粒子具备显著高效的温度–磁场转换效应及纳秒尺度的响应时间，可实现远程、高精度、快速的温度测量。本文综述了目前国内外磁纳米测温技术的发展现状，具体包括几种不同的磁纳米温度测量物理模型及仿真分析方法，以及相应的温度信息提取方法与测量系统设计。基于磁纳米粒子的远程温度测量方法主要原理是测量磁化率或磁化强度信号，通过Langevin磁学模型获取温度信息。多个原型实验证明了磁纳米测温技术在远程或超快速等约束条件下应用的可行性。磁纳米温度计为大功率芯片的结温测量、瞬态温度测量、穿透金属的远程温度测量以及高超声速风洞转捩点下游温度成像等极端条件下的温度测量提供了一种新的测量工具。
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| 关 键 词： | 纳米温度计 磁纳米粒子 快速温度成像 磁弛豫 |
| 收稿时间： | 2021-08-26 |
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| Affiliation: | School of Artificial Intelligence and Automation, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | The frontier demand for remote and rapid temperature measurement under special conditions poses a challenge to the classical temperature sensing technology. The temperature measurement method based on the principle of magnetism has great potential in these fields. Magnetic nanoparticles have a significant and efficient temperature-to-magnetic field conversion effect and a nanosecond response time, which can realize remote, high-precision and rapid temperature measurement. This article reviews the current development status of the magnetic nanometer temperature measurement technology at home and abroad, including several different physical models and simulation analysis methods for magnetic nanometer temperature measurement, as well as the corresponding temperature information extraction method and measurement system design. The main principle of the remote temperature measurement method based on magnetic nanoparticles is to measure the magnetic susceptibility or magnetization signal, and to obtain temperature information through the Langevin equation magnetic model. At present, multiple prototype experiments have proved the feasibility of the magnetic nanometer temperature measurement method under remote or ultrafast constrained conditions. The magnetic nanothermometer provides a new measurement tool for temperature measurement under extreme conditions such as junction temperature measurement of high-power chips, transient temperature measurement, remote temperature measurement through metal, and temperature imaging downstream of the transition point in a super wind tunnel. |
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