磁感应测量仪器是电磁场研究领域的关键工具,它在物理研究、电机制造以及电磁环境检测等多个重要领域都有着广泛应用。近年来,随着科技的进步,电磁场的测量研究更偏向于对三维动态磁场的精确测量,而目前常用的磁场测量装置仍面临价格高...磁感应测量仪器是电磁场研究领域的关键工具,它在物理研究、电机制造以及电磁环境检测等多个重要领域都有着广泛应用。近年来,随着科技的进步,电磁场的测量研究更偏向于对三维动态磁场的精确测量,而目前常用的磁场测量装置仍面临价格高昂或测量维度低等问题。本文提出了一种基于单轴霍尔传感器矢量合成设计方法的三维弱磁场测量仪,利用霍尔传感器的高灵敏度、小体积等优点,实现了对待测磁场的三维测量。该测量仪采用分点式探头获取x、y、z方向的磁场强度分量Bx、By、Bz,通过A/D转换模块转换为数字分量,并通过矢量合成的方法求取矢量和,即测量点空间三维磁感应强度大小。同时,引入亥姆霍兹线圈结合磁屏蔽技术实现可控的局部均匀磁感应强度,作为测量数据的校准对象。经过严格的实验验证,该三维弱磁场测量仪对磁场强度的测量相对误差小于3.3%,具有较高的可靠性。Magnetic induction measuring instruments are crucial tools in the field of electromagnetic research, widely applied in areas such as physical research, motor manufacturing, and electromagnetic environment detection. In recent years, with the advancement of technology, the focus of electromagnetic field measurement research has shifted towards the precise measurement of three-dimensional dynamic magnetic fields. However, the commonly used magnetic field measuring devices still face issues such as high cost or low measurement dimensions. This paper proposes a three-dimensional weak magnetic field measurement instrument based on the vector synthesis design method of single-axis Hall sensors, utilizing the advantages of high sensitivity and small size of Hall sensors to achieve three-dimensional measurement of the magnetic field to be tested. The instrument uses a distributed probe to obtain the magnetic field strength components in the x, y, and z directions, converts them into digital components through an A/D conversion module, and calculates the vector sum through vector synthesis, which is the size of the three-dimensional magnetic induction intensity at the measurement point. Meanwhile, Helmholtz coils combined with magnetic shielding technology are introduced to achieve a controllable local uniform magnetic induction intensity, serving as the calibration object for measurement data. After rigorous experimental verification, the relative error of the three-dimensional weak magnetic field measurement instrument for magnetic field strength measurement is less than 3.3%, demonstrating high reliability.展开更多
电磁范数作为一种定量表征脉冲波形特征的工具,已被美军标和IEC等多个国际标准所采纳,可应用于高功率电磁环境效应机理和评估技术研究。首先简要分析了不同电磁范数的物理意义及其内在关系,然后介绍了基于高速数字采样与存储技术研制的...电磁范数作为一种定量表征脉冲波形特征的工具,已被美军标和IEC等多个国际标准所采纳,可应用于高功率电磁环境效应机理和评估技术研究。首先简要分析了不同电磁范数的物理意义及其内在关系,然后介绍了基于高速数字采样与存储技术研制的范数探测器。范数探测器把测试信号直接数字化并存储到探测器内部,而不再需要传输线缆或光缆,其实时采样频率可配置为1 GHz或2 GHz,存储深度为4 k B,可拓展。编制了上位机数据软件用于在电脑上显示波形并快速计算给出波形的常用电磁范数。该范数探测器可以解决密闭腔体内耦合场全波形的测量,计算给出的电磁范数可用于效应的敏感参数分析和效应评估,以及响应定界、电磁辐射源的时间反演定位等领域。展开更多
文摘磁感应测量仪器是电磁场研究领域的关键工具,它在物理研究、电机制造以及电磁环境检测等多个重要领域都有着广泛应用。近年来,随着科技的进步,电磁场的测量研究更偏向于对三维动态磁场的精确测量,而目前常用的磁场测量装置仍面临价格高昂或测量维度低等问题。本文提出了一种基于单轴霍尔传感器矢量合成设计方法的三维弱磁场测量仪,利用霍尔传感器的高灵敏度、小体积等优点,实现了对待测磁场的三维测量。该测量仪采用分点式探头获取x、y、z方向的磁场强度分量Bx、By、Bz,通过A/D转换模块转换为数字分量,并通过矢量合成的方法求取矢量和,即测量点空间三维磁感应强度大小。同时,引入亥姆霍兹线圈结合磁屏蔽技术实现可控的局部均匀磁感应强度,作为测量数据的校准对象。经过严格的实验验证,该三维弱磁场测量仪对磁场强度的测量相对误差小于3.3%,具有较高的可靠性。Magnetic induction measuring instruments are crucial tools in the field of electromagnetic research, widely applied in areas such as physical research, motor manufacturing, and electromagnetic environment detection. In recent years, with the advancement of technology, the focus of electromagnetic field measurement research has shifted towards the precise measurement of three-dimensional dynamic magnetic fields. However, the commonly used magnetic field measuring devices still face issues such as high cost or low measurement dimensions. This paper proposes a three-dimensional weak magnetic field measurement instrument based on the vector synthesis design method of single-axis Hall sensors, utilizing the advantages of high sensitivity and small size of Hall sensors to achieve three-dimensional measurement of the magnetic field to be tested. The instrument uses a distributed probe to obtain the magnetic field strength components in the x, y, and z directions, converts them into digital components through an A/D conversion module, and calculates the vector sum through vector synthesis, which is the size of the three-dimensional magnetic induction intensity at the measurement point. Meanwhile, Helmholtz coils combined with magnetic shielding technology are introduced to achieve a controllable local uniform magnetic induction intensity, serving as the calibration object for measurement data. After rigorous experimental verification, the relative error of the three-dimensional weak magnetic field measurement instrument for magnetic field strength measurement is less than 3.3%, demonstrating high reliability.
文摘电磁范数作为一种定量表征脉冲波形特征的工具,已被美军标和IEC等多个国际标准所采纳,可应用于高功率电磁环境效应机理和评估技术研究。首先简要分析了不同电磁范数的物理意义及其内在关系,然后介绍了基于高速数字采样与存储技术研制的范数探测器。范数探测器把测试信号直接数字化并存储到探测器内部,而不再需要传输线缆或光缆,其实时采样频率可配置为1 GHz或2 GHz,存储深度为4 k B,可拓展。编制了上位机数据软件用于在电脑上显示波形并快速计算给出波形的常用电磁范数。该范数探测器可以解决密闭腔体内耦合场全波形的测量,计算给出的电磁范数可用于效应的敏感参数分析和效应评估,以及响应定界、电磁辐射源的时间反演定位等领域。
