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基于数字集成和频率均衡的瞬态磁场传感器的研制

Development of a Transient Magnetic Field Sensor Based on Digital Integration and Frequency Equalization.

作者信息

Ouyang Hongzhi, Yao Xueling, Chen Jingliang

机构信息

State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.

School of Electrical Engineering, University of South China, Hengyang 421001, China.

出版信息

Sensors (Basel). 2021 Jun 22;21(13):4268. doi: 10.3390/s21134268.

DOI:10.3390/s21134268
PMID:34206541
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8271745/
Abstract

Transient magnetic field sensors are used in various electromagnetic environment measurement scenarios. In this paper, a novel magnetic field sensor based on a digital integrator was developed. The antenna was a small B-DOT loop. It was designed optimally for the simulation. The magnetic field signal was digitally integrated with the improved Al-Alaoui algorithm, resulting in less integration error. To compensate for the bandwidth loss of the optical fiber system, we specially designed an FIR (finite impulse response) filter for frequency compensation. The circuit was described, and the transimpedance amplifier was specially designed to ensure the low noise characteristic of the receiver. The sensitivity of the sensor was calibrated at 68.2 A·m/mV, the dynamic range was 50 dB (1-300 kA/m), the linear correlation coefficient was 0.96, and the bandwidth was greater than 100 MHz. It was tested and verified under the action of an A-type lightning current. The sensor exhibited high-precision performance and flat amplitude-frequency characteristics. Therefore, it is suitable for lightning positioning, partial discharge testing, electromagnetic compatibility management, and other applications.

摘要

瞬态磁场传感器用于各种电磁环境测量场景。本文研制了一种基于数字积分器的新型磁场传感器。天线是一个小型B-DOT环。它针对仿真进行了优化设计。磁场信号采用改进的Al-Alaoui算法进行数字积分，积分误差更小。为补偿光纤系统的带宽损失，我们专门设计了一个FIR（有限脉冲响应）滤波器进行频率补偿。描述了该电路，并专门设计了跨阻放大器以确保接收器的低噪声特性。该传感器的灵敏度校准为68.2 A·m/mV，动态范围为50 dB（1-300 kA/m），线性相关系数为0.96，带宽大于100 MHz。在A型雷电流作用下进行了测试和验证。该传感器具有高精度性能和扁平的幅频特性。因此，它适用于雷电定位、局部放电检测、电磁兼容性管理等应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b218/8271745/6ff5e5b4b441/sensors-21-04268-g021.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b218/8271745/167ca37c90cd/sensors-21-04268-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b218/8271745/2d1944b27259/sensors-21-04268-g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b218/8271745/5bcb844f6927/sensors-21-04268-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b218/8271745/8ca0abcdca99/sensors-21-04268-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b218/8271745/edbbaaecd511/sensors-21-04268-g015.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b218/8271745/5d4690470716/sensors-21-04268-g016.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b218/8271745/6dc6aabc7e6d/sensors-21-04268-g017.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b218/8271745/72fb0fa8d5c4/sensors-21-04268-g018.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b218/8271745/2077ca3489b8/sensors-21-04268-g019.jpg
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本文引用的文献

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Sensors (Basel). 2018 Sep 19;18(9):3167. doi: 10.3390/s18093167.
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Research on Transmission Line Voltage Measurement Method of D-Dot Sensor Based on Gaussian Integral.
瞬态电磁脉冲测量中D-Dot测量系统的识别与补偿
Sensors (Basel). 2022 Nov 6;22(21):8538. doi: 10.3390/s22218538.
基于高斯积分的 D 型传感器传输线电压测量方法研究。
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Decomposition of Composite Electric Field in a Three-Phase D-Dot Voltage Transducer Measuring System.三相D型点电压互感器测量系统中复合电场的分解
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