Calibration of Electromagnetic Dot Sensor—Part 1: B-Dot Mode

Agry, Ahmad Al; Schill, Robert A.

doi:10.1109/jsen.2014.2324580

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…Since the surface current density detector is essentially a measurement of the magnetic field intensity, the calibration of the measurement system can be carried out in the TEM chamber, which can generate a uniform electromagnetic field environment [30,31]. As shown in Figure 9, the calibration system is constructed to test the double exponential wave response of the developed sensor.…”

Section: Measurement System Calibrationmentioning

confidence: 99%

Design of Self-Integrating Transient Surface Current Density Sensor Integrated Fiber Transmission Link

Liu,

Wu,

Nie

et al. 2023

Sensors

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The transient surface current density reflects the external coupling of the electromagnetic pulse (EMP) to the tested device. In this paper, the generation mechanism and measurement principle of conductor surface current density are introduced, and the surface current density distribution irradiated by EMP on a typical aircraft structure is simulated and analyzed. The traditional surface current density is usually measured by B-dot antenna, but its output signal is the differential of the measured signal, so additional integrators or numerical integration of the measured data are required. In this paper, a self-integrating surface current sensor based on optical fiber transmission is designed based on the shielded loop antenna with gap structure. The output signal is the real signal waveform to be measured. Compared with coaxial cables, integrated optical fiber transmission improves the anti-interference ability of long-distance transmission signals. At the same time, the design process of the sensor is introduced in detail. The bandwidth of the sensor is 300 kHz~500 MHz, the sensitivity is calibrated at 1.23 (A·m−1)/mV, and the dynamic range is ±25~1400 A·m−1 (35 dB). The surface current of a metal plate is measured in a bounded wave electromagnetic pulse simulator using a detector developed in this paper. The test results show that the developed sensor has good engineering applicability.

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Section: Measurement System Calibrationmentioning

confidence: 99%

Design of Self-Integrating Transient Surface Current Density Sensor Integrated Fiber Transmission Link

Liu,

Wu,

Nie

et al. 2023

Sensors

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show abstract

“…In order to improve the sensor's ability to capture the surrounding electric field and avoid the interference caused by the introduction of grounding resistance [22,23,24,25,26], a Dual-Differential D-dot overvoltage sensor is designed. Figure 2 is the parameter and measurement principle of the Dual-Differential D-dot overvoltage sensor.…”

Section: Principle Of the Dual-differential D-dot Overvoltage Sensormentioning

confidence: 99%

Simulation, Design, and Test of a Dual-Differential D-Dot Overvoltage Sensor Based on the Field-Circuit Coupling Method

Zhao

Wang

Wang³

et al. 2019

Sensors

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Accurate measurement of overvoltage in power grids is of great significance to study the characteristics of overvoltage and design of insulation coordination. Based on the research of D-dot voltage sensor, we designed a Dual-Differential D-dot overvoltage sensor. In order to quantify the structural parameters of the sensor, improve the performance and measurement accuracy of the sensor. The Field-Circuit Coupling method was proposed to be used in the parameter design of D-dot overvoltage sensor. The joint simulation of space electromagnetic field model and equivalent circuit model of the Dual-Differential D-dot overvoltage sensor was established with the finite element simulation software Ansoft Maxwell and circuit simulation software Simplorer. Finally, the actual sensor was manufactured. A test platform was built to verify the steady-state and transient performance of the sensor. The results show that the Dual-Differential D-dot sensor has excellent steady-state and transient performance, the error of phase and amplitude are small, and the sensor can achieve the non-contact measurement of power transmission line. Simultaneously, the rationality of the Field-Circuit Coupling method was further verified.

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Design and theoretical analysis of current transformer based on B-dot planar printed circuit board coil

Zhao

Wang

Ban³

et al. 2017

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Purpose The purpose of this paper is to design a current transformer model based on the principle of B-dot. It can reflect the change of transmission line current and meet the requirement of automation and intelligence for current measurement in power system. Design/methodology/approach In this paper, a new type of current transformer is designed on the principle of B-dot, which has the structure of the inverse series of planar air core coils and the form of printed circuit board (PCB). With this structure, the current transformers can induce magnetic field quite well. The finite element simulation for the current transformer with n layers structure is conducted in the Maxwell, which help to optimize the design of the current transformer. Findings By setting up the experimental platform, the experiment of the current transformer is carried out. The results of the test show that the measurement accuracy can satisfy the requirement of measurement. Besides, the new current transformer has good transient characteristics and can meet the needs of the development of smart grid. Originality value The new type of current transformer is based on the principle of B-dot, which is designed with a new type of non-contact PCB hollow coil current transformer. It has no iron core, no ferromagnetic effect and the phenomenon of ferromagnetic resonance. It has great progress in its insulation performance, volume and bandwidth response. In addition, the planar hollow coil of the inverse series structure can make the structure more accurate.

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Calibration of Electromagnetic Dot Sensor—Part 1: B-Dot Mode

Cited by 8 publications

References 22 publications

Design of Self-Integrating Transient Surface Current Density Sensor Integrated Fiber Transmission Link

Design of Self-Integrating Transient Surface Current Density Sensor Integrated Fiber Transmission Link

Simulation, Design, and Test of a Dual-Differential D-Dot Overvoltage Sensor Based on the Field-Circuit Coupling Method

Design and theoretical analysis of current transformer based on B-dot planar printed circuit board coil

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