School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China.
James Watt School of Engineering, University of Glasgow, G12 8QQ Glasgow, United Kingdom.
Rev Sci Instrum. 2021 Mar 1;92(3):034707. doi: 10.1063/5.0038295.
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.
一个用于磁场检测和分析的霍尔传感器阵列系统在 X-FAB 0.18μm CMOS 技术中实现。磁场检测归因于金属线圈对金属颗粒的磁化和霍尔传感器阵列的传感特性。该系统从霍尔传感器、模拟前端电路、模数转换器 (ADC) 到微控制器单元提出了一个完整的解决方案。使用 Ansoft Maxwell 和 COMSOL Multiphysics 软件进行模拟验证，系统可以检测到的最小磁粒子直径为 2μm。所提出的 ADC 的测量信号噪声和失真比、无杂散动态范围和有效位数分别为 70.61dB、90.08dB 和 11.44 位。基于 STM32 的微系统结合了硬件和软件设计，可以有效地调整运动参数，并在磁场和电压信息的 LCD 屏幕上实现实时显示。与现有系统相比，该系统在便携性、成本和效率方面都有了很大的提高，旨在快速测量环境空气中和血液中的重金属颗粒，如 Fe、Co 和 Ni。
