Magnetic Nanoparticle Thermometer: An Investigation of Minimum Error Transmission Path and AC Bias Error

Sensors

Zhongzhou Du¹  Rijian Su²  Wenzhong Liu¹  Zhixing Huang¹ 

[1] School of Automation, Huazhong University of Science and Technology, Wuhan 430074, China; E-Mails:;School of Computer and Communication Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China; E-Mail:

关键词: magnetic nanoparticle thermometer (MNPT);    error source;    error transfer;    AC bias;    non-invasive temperature measurement;    magnetic nanoparticles (MNPs);   

DOI  :  10.3390/s150408624

来源: mdpi

【 摘 要 】

The signal transmission module of a magnetic nanoparticle thermometer (MNPT) was established in this study to analyze the error sources introduced during the signal flow in the hardware system. The underlying error sources that significantly affected the precision of the MNPT were determined through mathematical modeling and simulation. A transfer module path with the minimum error in the hardware system was then proposed through the analysis of the variations of the system error caused by the significant error sources when the signal flew through the signal transmission module. In addition, a system parameter, named the signal-to-AC bias ratio (i.e., the ratio between the signal and AC bias), was identified as a direct determinant of the precision of the measured temperature. The temperature error was below 0.1 K when the signal-to-AC bias ratio was higher than 80 dB, and other system errors were not considered. The temperature error was below 0.1 K in the experiments with a commercial magnetic fluid (Sample SOR-10, Ocean Nanotechnology, Springdale, AR, USA) when the hardware system of the MNPT was designed with the aforementioned method.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.