Development of a Cone-Shaped Pulsed Eddy Current Sensor

Gong, Yu; Huang, Xiaofei; Liu, Zenghua; Deng, Fei; Wu, Yufeng; He, Cunfu

doi:10.1109/jsen.2022.3140390

Cited by 16 publications

(4 citation statements)

References 29 publications

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“…The sensor is considered a proportional element to simplify the system model. Usually, the sensor is followed by a low-pass filter in series to eliminate the high-frequency signal (Gong et al, 2022). According to the existing low-pass filter circuit, the sinusoidal swept frequency signal is passed into the input.…”

Section: Modeling Of the Control Systemmentioning

confidence: 99%

Influence of displacement sensor runout on active magnetic bearing-rotor system and control analysis

Jian

Cheng

2023

Journal of Vibration and Control

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In the active magnetic bearing (AMB)-rotor system, a displacement sensor is one of the indispensable components. It detects the displacement of the rotor in real time and feeds back to the control system to realize the stable suspension of the rotor. However, due to electromagnetic interference, unstable power supply, poor grounding, and uneven rotor surface, the signal runout of the displacement sensor can often occur, resulting in rotor vibration. Given the above problems, this paper establishes the control model of the AMB-rotor system, lists three typical sensor runout signals, then analyzes the influence of different types of sensor runout on the system, and discusses the control methods under different sensor runout conditions. The research results have a specific guiding significance for vibration control of the maglev rotor under sensor runout influence.

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Section: Modeling Of the Control Systemmentioning

confidence: 99%

Influence of displacement sensor runout on active magnetic bearing-rotor system and control analysis

Jian

Cheng

2023

Journal of Vibration and Control

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“…Moreover, it is open source in terms of hardware and software. It is cheap as compared to other microcontrollers and requires less time for reading and writing applications (Gong et al, 2022). • LCD : LCD (liquid crystal display) screens are electrical display modules that can be utilized in a range of applications.…”

Section: System Hardwarementioning

confidence: 99%

Implementation of a smart energy meter using blockchain and Internet of Things: A step toward energy conservation

et al. 2022

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The looming energy crisis is affecting every sector of the world. The dire need to conserve energy has compelled researchers to bring automation to the power sector. The conservation of energy is one of the biggest challenges Third-World countries are facing in general and in Europe due to the Russian–Ukrainian war. There is a need to introduce such systems that can prevent energy loss and let users buy and sell excessive electricity they have. In the field of power and electricity, the Internet of Things (IoT) plays an active role in the conservation of energy. The new concept of smart grids is widely used for efficient transmission. The technique of blockchain can further reduce the wastage of energy and efficient consumption if it is used with smart grids. This article proposes a smart energy meter based on smart grids and blockchain. The proposed implementation is a demonstration containing a few microgrids, each with its very own blockchain. The users will use energy by making transactions, following the smart contracts. The focus is on the peer-to-peer transactions in a microgrid controlled by blockchain. The architectural design outcomes are a smart energy meter, a smart contract on the Ethereum blockchain, and an android application to monitor and control transactions and energy trade via smart contracts with other consumers.

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“…However, magnetization inevitably occurs in ferromagnetic coatings. Compared with the traditional PEC probe, this cone-shaped PEC probe could concentrate the magnetic field and be also sensitive to the change of weak signals [29]. The function generator excited square wave signals with an amplitude of 10 V, a frequency of 5 kHz, and a duty cycle of 50%.…”

Section: Experimental Systemmentioning

confidence: 99%

Quantitative Estimation of Fe-Based Amorphous Coating Thickness Based on Pulsed Eddy Current Technology

et al. 2022

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Fe-based amorphous coatings prepared by high-velocity oxyfuel (HVOF) spraying have the advantages of good mechanical properties, high density, low porosity, and high amorphous content. The service life and bonding strength of coating greatly depend on its thickness; however, the characterization of ferromagnetic coating thickness is a very difficult problem. Pulsed eddy current (PEC) is characterized by abundant signals in frequency domains. In this paper, the thickness measurement principle of ferromagnetic coating was explored, and the typical and entropy features from PEC signals were extracted. Seven integrated learning methods were combined to quantitatively characterize the coating thickness, namely Ridge Regression (RR), Lasso Regression (LR), Random Forest Regression (RFR), Extra Trees Regression (ETR), Gradient Boosting Tree Regression (GBTR), Addaptive Boost Regression (ABR) and eXtreme Gradient Boosting Regression (XGBR) algorithms. By comparing typical features with new ones, it was verified that the effective combination of entropy features and typical features could be used as effective feature parameters of eddy current signal. Statistical scores (RMSE and R 2 ) and GridsearchCV features were used to evaluate and optimize the established model. As indicated by the results, the proposed XGBR machine learning model well predicted the coating thickness, and the relative error less than 0.05 mm.

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Development of a Cone-Shaped Pulsed Eddy Current Sensor

Cited by 16 publications

References 29 publications

Influence of displacement sensor runout on active magnetic bearing-rotor system and control analysis

Influence of displacement sensor runout on active magnetic bearing-rotor system and control analysis

Implementation of a smart energy meter using blockchain and Internet of Things: A step toward energy conservation

Quantitative Estimation of Fe-Based Amorphous Coating Thickness Based on Pulsed Eddy Current Technology

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