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Experimental Investigation of a Johnson Noise Thermometry Using GMR Sensor for Electric Vehicle Applications

机译：Johnson噪声温度使用GMR传感器的实验研究电动汽车应用

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摘要

A new temperature measurement method using a giant magnetoresistance (GMR) sensor based on Johnson noise thermometry (JNT) is proposed in this paper. This paper presents the principle of this GMR-based JNT and demonstrates its feasibility by measuring power spectral density of noise voltage in the bandwidth from 10 kHz to 22.8 kHz and resistance of GMR sensor and analyzing their relationship with the absolute temperature. The measuring errors throughout the measurement of temperature from -40 degrees C and 150 degrees C in the thermal chamber were less than +/- 1.8 degrees C with integration time of 58.6 s. Its dynamic sensing performance under both varying temperature and changing external magnetic field was characterized and demonstrated. A practical demonstration of the GMR-based JNT for measurement of surface temperature of a battery pack on an electric-vehicle testbed was also provided. Therefore, it is feasible to implement this new thermometry with a GMR sensor, making spintronic sensor multifunctional in EV applications by being a temperature sensor as well.
机译：本文提出了一种新的基于Johnson噪声温度（JNT）的巨磁阻（GMR）传感器的新型温度测量方法。本文介绍了基于GMR的JNT的原理，并通过测量带宽中的带宽中的功率谱密度从10 kHz到22.8kHz的功率谱密度和GMR传感器的电阻，并分析它们与绝对温度的关系来展示其可行性。在-40℃和150摄氏度中，在热室中测量温度测量的测量误差小于+/- 1.8摄氏度，整合时间为58.6秒。其在不同温度和改变外部磁场下的动态传感性能进行了表征和说明。还提供了基于GMR的JNT用于测量电动车辆测试用电池组表面温度的实际证明。因此，使用GMR传感器实现这一新的测温仪是可行的，通过作为温度传感器，在EV应用中制作Spintronic传感器多功能。

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