一种研究线性霍尔传感器频率响应特性的测试平台  

A testing platform for frequency response characteristics of linear Hall sensors

作　　者：刘宇 胡亮亮 廖明照 周儒 徐进章[1] LIU Yu;HU Liangliang;LIAO Mingzhao;ZHOU Ru;XU Jinzhang(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;School of Instrument Science and Optoelectronics Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Province Key Laboratory of Measuring Theory and Precision Instrument,Hefei University of Technology,Hefei 230009,China;School of Microelectronics,Hefei University of Technology,Hefei 230601,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009 [2]合肥工业大学仪器科学与光电工程学院,安徽合肥230009 [3]合肥工业大学测量理论与精密仪器安徽省重点实验室,安徽合肥230009 [4]合肥工业大学微电子学院,安徽合肥230601

出　　处：《Journal of Measurement Science and Instrumentation》2024年第1期105-119,共15页测试科学与仪器（英文版）

基　　金：supported by the University Synergy Innovation Program of Anhui Province(No.GXXT2022-011);The Fundamental Research Funds for the Central Universities(No.JZ2022HGQA0203);National Natural Science Foundation of China(No.12075072)。

摘　　要：线性霍尔传感器被广泛用于测量磁场强度,但针对霍尔传感器动态响应特性的研究却很少。为此,设计并搭建了一种线性霍尔传感器的频率响应特性测试平台。该平台由可控恒流源、线圈、线性霍尔传感器、低噪声放大器和数据采集装置组成,通过构建系统传递函数并提出动态更新的传递函数的方法,实现了霍尔传感器动态响应特性的精确测量。利用该平台分别测试了NHE520F和P3A两款芯片的动态特性性能。结果显示,在2.5 kHz-2 MHz范围内,这两款霍尔传感器在幅频特性和相频特性方面的性能差异在测试平台上被充分显现,而且霍尔传感器的动态特性参数与静态特性参数并非必然一致,动态特性分布也不相同。此外,根据多种温湿度条件下测得的霍尔传感器幅频特性与相频特性,绘制了霍尔传感器的平均动态特性曲线和3个标准差包络曲线。基于该测试平台获得的实验数据对研究霍尔传感器动态响应特性具有重要意义。Linear Hall sensors are widely used to measure magnetic field strength,but there are few studies on the dynamic response characteristics of Hall sensors.To tackle this issue,a testing platform for the frequency response characteristics of linear Hall sensors was built,which was composed of a controllable constant current source,coils,linear Hall sensors,a low noise amplifier,and a data acquisition device.The system transfer function was constructed and a method of dynamically updating the transfer function was proposed,which realizes the accurate measurement of the dynamic response characteristics of Hall sensors.The dynamic characteristics of NHE520F and P3A were tested on this platform.The results showed that the performance differences in amplitude-frequency and phase-frequency characteristics of these Hall sensors in the range of 2.5 kHz-2 MHz were fully reflected on this testing platform.The dynamic characteristic parameters of Hall sensors were not necessarily consistent with the static characteristic parameters of Hall sensors,and the distributions of dynamic characteristics were also different.Additionally,according to the amplitude-frequency and phase-frequency characteristics of Hall sensors measured under various temperature and humidity conditions,the average dynamic characteristic curves and three standard deviation envelope curves of Hall sensors were plotted.The data obtained by this testing platform are of great significance for the research of dynamic response characteristics of Hall sensors.

关 键 词：霍尔传感器 磁场测量 幅频特性 相频特性 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]