A Hall sensor array system for magnetic field detection and analysis is realized in X-FAB 0.18 μm CMOS technology. Magnetic field detection is attributed to the magnetization of metal coils to metal particles and the sensing characteristics of the Hall sensor array. The system puts forward a complete solution from Hall sensors, analog front-end circuit, analog-to-digital converter (ADC) to microcontroller unit. Using Ansoft Maxwell and COMSOL Multiphysics software for simulation verification, the minimum diameter of magnetic particles that can be detected in the system is 2 μm. The measured signal to noise and distortion ratio, spurious free dynamic range, and effective number of bits of the proposed ADC are 70.61 dB, 90.08 dB, and 11.44-bit, respectively. The microsystem based on STM32 combines hardware and software design, which can effectively adjust the motion parameters and realize the real-time display in the LCD screen of the magnetic field and voltage information. Compared to the prior system, the portability, cost, and efficiency have been considerably improved, which is aimed at the rapid measurement of heavy metal particles such as Fe, Co, and Ni in ambient air and blood.
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March 2021
Research Article|
March 10 2021
A CMOS Hall sensor modeling with readout circuitry and microcontroller processing for magnetic detection
Special Collection:
Advances in Measurements and Instrumentation Leveraging Embedded Systems
Hua Fan
;
Hua Fan
a)
1
School of Electronic Science and Engineering, University of Electronic Science and Technology of China
, Chengdu 610054, China
a)Author to whom correspondence should be addressed: fanhua7531@163.com
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Jiayi Zhang;
Jiayi Zhang
1
School of Electronic Science and Engineering, University of Electronic Science and Technology of China
, Chengdu 610054, China
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Siming Zuo
;
Siming Zuo
2
James Watt School of Engineering, University of Glasgow
, G12 8QQ Glasgow, United Kingdom
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Qiang Hu;
3
Jihua Laboratory
, Foshan 528200, China
a)Author to whom correspondence should be addressed: fanhua7531@163.com
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Quanyuan Feng;
Quanyuan Feng
4
School of Information Science and Technology, Southwest Jiaotong University
, Chengdu 611756, China
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Hadi Heidari
Hadi Heidari
2
James Watt School of Engineering, University of Glasgow
, G12 8QQ Glasgow, United Kingdom
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a)Author to whom correspondence should be addressed: fanhua7531@163.com
b)
Electronic mail: huqiang@jihualab.com
Note: Paper published as part of the Special Topic on Advances in Measurements and Instrumentation Leveraging Embedded Systems.
Rev. Sci. Instrum. 92, 034707 (2021)
Article history
Received:
November 20 2020
Accepted:
February 12 2021
Citation
Hua Fan, Jiayi Zhang, Siming Zuo, Qiang Hu, Quanyuan Feng, Hadi Heidari; A CMOS Hall sensor modeling with readout circuitry and microcontroller processing for magnetic detection. Rev. Sci. Instrum. 1 March 2021; 92 (3): 034707. https://doi.org/10.1063/5.0038295
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