基于输出误差模型的B-Dot传感器标定方法

王可; 段艳涛; 李炎新; 李少磊

doi:10.11884/HPLPB201931.190244

基于输出误差模型的B-Dot传感器标定方法

doi: 10.11884/HPLPB201931.190244

陆军工程大学电磁环境效应与光电工程重点实验室, 南京 210007

基金项目:

国家重点研发计划项目 2017YFC1501505

详细信息

作者简介:
王可(1995—), 男, 在读研究生, 从事雷电防护与电磁脉冲测量; wk4emp@qq.com

通讯作者:
段艳涛(1980—), 男, 博士, 讲师, 从事计算电磁学, 雷电与电磁脉冲; dcmchdyt@126.com

中图分类号: TM937.2
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- 被引次数: 0
出版历程
- 收稿日期: 2019-07-01
- 修回日期: 2019-08-12
- 刊出日期: 2019-10-15

Calibration method of B-dot sensors based on OE model

National Key Laboratory on Electromagnetic Environment Effects and Electro-Optical Engineering, Army Engineering University of PLA, Nanjing 210007, China

摘要

摘要: B-dot传感器因其频带宽, 体积小以及良好的稳定性而广泛应用于电磁脉冲(EMP)测量。任何理论模型与实际情况之间都存在差异, 因此B-dot传感器必须在实验室环境下进行标定。针对传统的时域标定方法存在的弊端, 提出一种基于输出误差(OE)模型的频域标定方法。该方法利用单输入单输出的OE模型传递函数来表征B-dot传感器的频响特性, 然后通过部分线性回归求得传感器实际工作的频率范围的灵敏度系数。经验证, 该方法能够有效避免因阻抗突变引起的过冲或振铃现象对标定精度的影响。
- 电磁脉冲 /
- B-dot传感器 /
- 磁场 /
- 频域标定 /
- OE模型 /
- 系统辨识
Abstract: B-dot sensors are widely used in electromagnetic pulse(EMP)measurements due to their wide frequency band, small size, and good stability.There is a difference between any theoretical model and the actual situation, thus the B-dot sensor must be calibrated under the laboratory environment.Aiming at the shortcomings of traditional time-domain calibration methods, this paper proposes a frequency-domain calibration method based on OE model.The method uses the OE model transfer function of single input and single output to characterize the frequency response characteristics of the B-dot sensor, and then obtains the sensitivity coefficient of the frequency range in which the sensor actually works by partial linear regression.According to verification experiment, it can be determined that this method can effectively avoid the influence on calibration accuracy of overshoot or ringing caused by impedance mutation.
- electromagnetic pulse /
- B-dot sensor /
- magnetic field /
- frequency-domain calibration /
- OE model /
- system identification

HTML全文

图 1 屏蔽环磁场传感器

Figure 1. B-dot sensor with shielded small loop

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图 2 B-dot传感器幅频响应曲线

Figure 2. Amplitude-frequency response curve of B-dot sensor

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图 3 B-dot传感器标定平台

Figure 3. Calibration platform of B-dot sensor

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图 4 时延估计结果

Figure 4. Time delay estimation result

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图 5 模型输出与测量输出的对比结果

Figure 5. Comparison of model output and measured output

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图 6 部分线性回归比较结果

Figure 6. Comparison of partial linear regression

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图 7 方波验证结果

Figure 7. Result of square wave verification

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表 1 不同标定方法标定结果对比

Table 1. Comparison of calibration results by different methods

charging voltage/kV	sensitivity coefficient/(A·m^－1·s·V^－1)
charging voltage/kV	peak value calibration method	FFT calibration method	OE model calibration method
4.0	86.17	99.49	89.07
4.5	85.50	99.09	88.54
5.0	85.22	98.08	88.55
5.5	83.82	98.13	87.98
6.0	83.40	97.56	87.67
6.5	83.64	98.76	87.64
7.0	84.04	99.82	88.23
average	84.54	98.70	88.24
standard deviation	1.07	0.82	0.52

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