19 results on '"Traore, Papa Silly"'
Search Results
2. Design Approach for an Off-diagonal Giant Magneto Impedance Sensor Based on Field Programmable Gate Array
- Author
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Traore, Papa Silly, Asfour, Aktham, Yonnet, Jean Paul, G2Elab, HAL, Laboratoire de Génie Electrique de Grenoble (G2ELab ), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), and Université Grenoble Alpes (UGA)
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[SPI.NRJ]Engineering Sciences [physics]/Electric power ,[SPI.NRJ] Engineering Sciences [physics]/Electric power - Published
- 2020
3. Noise performance versus hardware implementation in high sensitivity digital GMI sensors
- Author
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Traore, Papa-Silly, Asfour, Aktham, Yonnet, Jean-Paul, Laboratoire de Génie Electrique de Grenoble (G2ELab), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
- Subjects
[SPI.NRJ]Engineering Sciences [physics]/Electric power - Abstract
International audience; In the Giant Magneto-Impedance (GMI) sensors, one of the important features that limit thedetection performance is the equivalent magnetic noise level. In the white noise region, theperformance is mainly limited by the noise from the electronic conditioning not by the intrinsicnoise of the sensing element [1].Digital approaches for the electronic conditioning of these sensors were introduced in recentworks [1]-[2]. These promising approaches and the related software are commonly known asSoftware Defined Radio (SDR). They are based on a direct sampling of the voltage across thesensitive element using an Analog-to-Digital Converter (ADC). The amplitude-demodulation isthen digitally achieved using a Direct-Down-Conversion (DDC) to obtain the final sensor output.By far, this DDC generally includes a local Numerically-Controlled Oscillator (NCO), a set ofdigital filters, multipliers and digital gain as well asrounding circuits(necessary for the real-timeprocessing since only a limited number of bits can be processed by the hardware). All of theseinvolved digital functions are sources of noise [3].In this paper, thekey rules for the real-time implementation of these digital functions arepresented. The idea is to clearly show that the optimization of the noise performance requiresstringent implementation rules. These rules include, but are not limited to, the choice of theparameters of the NCO, the type andthe number of coefficients of the digital filters, the size ofaccumulators of the multipliers and of the rounding circuits. By respecting the proposed rules,the noise of the DDC can be less than the Least Significant Bit (LSB) of the ADC. In this case,the noise of the sensor in the white noise region is mainly dominated by the ADC.To validate the concept, a prototype of an on off-diagonal GMI sensor was developed using a 12-bit ADC having a sampling frequency of 125 MHz. The DDC was implemented using a Field-Programmable-Gate-Array (FPGA). With this realization, performance of 1.8 pT/√Hz isobtained in the white noise region (for sensitive element of 25 mm long). Improving the noiseperformance requires the use of an ADC with high resolution and/or higher sampling frequency.We show that with a technological jump of the ADC technology, the intrinsic noise of the sensitive element could be achieved with the digital concept.
- Published
- 2018
4. Implementation of high sensitivity digital GMI sensors using FPGA
- Author
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Traore, Papa Silly, Asfour, Aktham, Yonnet, Jean-Paul, Laboratoire de Génie Electrique de Grenoble (G2ELab), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
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[SPI.NRJ]Engineering Sciences [physics]/Electric power - Abstract
International audience; The digital electronic conditioning for the high sensitivity Giant Magneto-Impedance (GMI)Similar interest in digital electronics wastioning of orthogonal fluxgate sensors in fundamental mode[3]. Byfar, such electronics is mainly composed of a Direct Digital Synthesizer (DDS) which supplies, to the sensitive element. The voltage across theDigital Converter (ADC).Down-Converter (DDC).This DDC mainly includes local digital oscillator (or NCO for Numerically-Controlled-, and digital low-passdecimation filters. These involved functions in such digital conditioning can be realized usingspecific integrated circuit)[1-2] or high-costIn this paper, a new concept for the implementation ofthis digital electronic conditioning for the GMI sensors is presented. This concept is based on theArray (FPGA) reconfigurable circuits. When compared withASICs, the FPGA exhibits advantages such as the high degree of flexibility in theThe architecture of a developeddiagonal GMI sensor using FPGA is illustrated in Fig. 1.
- Published
- 2018
5. Towards digital GMI magnetometers
- Author
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Traore, Papa Silly, Asfour, Aktham, Yonnet, Jean-Paul, Laboratoire de Génie Electrique de Grenoble (G2ELab), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
- Subjects
[SPI.NRJ]Engineering Sciences [physics]/Electric power - Abstract
International audience; Fully digital electronics forworks [1-3]. The promising achievedwhite noise region [4]) in openfullmagnetometer.In this paperThe sensitive element was a CoFeSiB wirepick-up coil. The excitation currentvoltage across the pick-up coil was directly sampled by an AnalogThe digital demodulation (or Digital Down Conversion)from a Numerically-Controlleddigital filters). The digital output was converted into theAnalog Converter (DAC). The resulting voltage,field, Bf, using a resistor, Rf, and a 220static gains of the direct chain and of the feedback,functioning of the digital magnetometer, tT/V) so as the theoretical sensitivity,case, the measured sensitivityIt is to note that, on one hand,optimization of the sensitivity andof the noise level of themagnetometer was performed atthis stage. On another hand, thedigital processingintroduces sometime-delay which could impactthe stability of the loop. In thecurrent design, a delay of44μswas estimated andmeasured.This small delay shouldimpose a maximum frequencythe measured fields
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- 2018
6. Digital Electronic Conditioning Approach for the High Sensitivity Off-diagonal GMI Sensors
- Author
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Traore, Papa Silly, Asfour, Aktham, Yonnet, Jean-Paul, Boudinet, Cédric, Laboratoire de Génie Electrique de Grenoble (G2ELab), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
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[SPI.NRJ]Engineering Sciences [physics]/Electric power ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2018
7. Practical use of GMI effect to make a current sensor (Invited talk)
- Author
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Asfour, Aktham, Nabias, Julie, Traore, Papa Silly, Yonnet, Jean-Paul, Garcia, Sylvie, Laboratoire de Génie Electrique de Grenoble (G2ELab), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
- Subjects
[SPI.NRJ]Engineering Sciences [physics]/Electric power ,[SPI.NRJ] Engineering Sciences [physics]/Electric power - Abstract
International audience; Giant Magneto-Impedance (GMI) is a large change of the high frequency impedance of somesoft magnetic materials when they are subjected to an external magnetic field. This effect can beused to realizemagnetic sensors based on the impedance measurement of the sensitiveelement.Despite the great advantages of the GMI such as the high sensitivity, the potential ofminiaturization as well as the large bandwidth, there is still only a few concrete or industrialachievements of these sensors.One of the key features of these GMI sensors is their ability to measure both DC and ACmagnetic fields by the same sensitive element. This feature is of great value for a large palette ofapplications like the contactless current measurement(based on the measurement of the magneticfield produced by the measured current [1]).For this application, the mechanical flexibility ofsome GMI elements (like amorphous wires) is also another key andvery useful feature forrealizing toroidal flexible sensors (the sensing element forms a loop around the conductor ofinterest). Such flexible sensors are needed in many industrial environments where rigid toroidalstructures of the current sensor are not convenient.This paperpresents an overview of a full attempt of design andrealization of a quasi-industrialGMI-based currentsensor. The sensor combines DC/AC measurements in a same flexiblesensitive element. The paper addresses several practical problems encountered in a realmeasurement environment. In this context, main attention is paid to the impact of the influencequantities that largely condition the implementation strategies and solutions of the sensor. For theintended industrialapplication,these influence quantitiesfirstly include the operating temperature[2]. Its impact on the intrinsic sensor response is addressed in a quasi-industrial temperaturerange. Secondly, bending stress on the sensitive element is another involved influence parameterin the toroidal and flexible structure. This constraint effect is also characterized [3] - [4]. Finally,the third considered influence parameter is the effect of magnetic disturbances such as theeccentricity of the conductor of interest and the impact of the surrounding magnetic fields (earthfield or fields produced by others conductors in close proximity to the sensor). Differentstrategies of implementation and solutions, taking into account the impact of influenceparameters, are proposed and compared. A sensor prototype is realized and its performances aregiven and discussed .
- Published
- 2018
8. Introduction of real-time digital processing techniques for the high-sensitivity GMI sensors
- Author
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Traore, Papa Silly, Asfour, Aktham, Yonnet, Jean-Paul, Boudinet, Cédric, Garcia, Sylvie, Laboratoire de Génie Electrique de Grenoble (G2ELab), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
- Subjects
[SPI.NRJ]Engineering Sciences [physics]/Electric power ,ComputingMilieux_MISCELLANEOUS ,[SPI.NRJ] Engineering Sciences [physics]/Electric power - Abstract
International audience
- Published
- 2018
9. Noise Performance of SDR-Based Off-Diagonal GMI Sensors
- Author
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Dolabdjian, Christophe, Traore, Papa-Silly, Asfour, Aktham, Yonnet, Jean-Paul, Dolabdjian, Christophe P., Equipe Electronique - Laboratoire GREYC - UMR6072, Groupe de Recherche en Informatique, Image et Instrumentation de Caen (GREYC), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU), Laboratoire de Génie Electrique de Grenoble (G2ELab), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
- Subjects
010302 applied physics ,Noise temperature ,Engineering ,business.industry ,Noise spectral density ,010401 analytical chemistry ,Noise figure ,01 natural sciences ,Noise (electronics) ,Noise floor ,0104 chemical sciences ,[SPI]Engineering Sciences [physics] ,Noise generator ,0103 physical sciences ,Phase noise ,Electronic engineering ,Flicker noise ,Electrical and Electronic Engineering ,business ,Instrumentation ,ComputingMilieux_MISCELLANEOUS - Abstract
In this paper, we propose a general model to evaluate the equivalent magnetic noise for an off-diagonal giant magneto-impedance (GMI) sensor utilizing a software-defined radio (SDR) as a digital receiver. Based on this SDR approach, an analog-to-digital conversion (ADC) of the voltage induced by the sensing element is directly performed. The signal processing is digitally achieved in real time. It includes a digital quadrature demodulation, a decimation, and a filtering. The approach allows to give the key rules for quantifying the white noise level of this digital implementation. The voltage noise spectral density of the ADC and of each SDR stage is given. The white noise level expected by the modeling was in good agreement with the measurements. With a sensing element composed of a 400 turn coil wound around a co-rich GMI wire, equivalent magnetic noise levels of 220 and 4.2 pT/ $\sqrt {Hz}$ were obtained at 1 Hz and in the white noise region, respectively. The potential improvement of these performances, allowed by this digital conditioning, as well as limitations is also discussed.
- Published
- 2017
10. Novel design of high sensitivity GMI magnetic sensors using SDR
- Author
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Traore, Papa Silly, Asfour, Aktham, Yonnet, Jean-Paul, Laboratoire de Génie Electrique de Grenoble (G2ELab), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
- Subjects
[SPI.NRJ]Engineering Sciences [physics]/Electric power ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2017
11. Off-diagonal GMI Sensors with Software Defined Radio Detector: Implementation and performance
- Author
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Traore, Papa Silly, Asfour, Aktham, Yonnet, Jean-Paul, Laboratoire de Génie Electrique de Grenoble (G2ELab), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
- Subjects
[SPI.NRJ]Engineering Sciences [physics]/Electric power ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2017
12. Noise investigation of a GMI sensor utilizing a digital synchronous detector
- Author
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Traore, Papa Silly, Asfour, Aktham, Yonnet, Jean-Paul, Laboratoire de Génie Electrique de Grenoble (G2ELab), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
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[SPI.NRJ]Engineering Sciences [physics]/Electric power ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2016
13. Off-diagonal GMI sensors with a SDR-based synchronous detection
- Author
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Traore, Papa Silly, Asfour, Aktham, Yonnet, Jean-Paul, Laboratoire de Génie Electrique de Grenoble (G2ELab), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])
- Subjects
[SPI.NRJ]Engineering Sciences [physics]/Electric power ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2016
14. Introduction of real-time digital processing techniques for the high-sensitivity GMI sensors.
- Author
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Traore, Papa Silly, Asfour, Aktham, Yonnet, Jean Paul, and Boudinet, Cedric
- Subjects
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GIANT magnetoresistance , *DETECTORS , *SOFTWARE radio , *WHITE noise , *MAGNETIC fields - Abstract
A new fully digital Giant Magneto-Impedance (GMI) sensor is presented. The design combines the off-diagonal configuration of the sensitive element with a real-time digital electronic conditioning based on a Software Defined Radio (SDR). Compared to a conventional implementation of these sensors, the proposed design exhibits key advantages. These include firstly the simplicity of obtaining a quasi-linear sensor response around the zero-field point without making use of a bias magnetic field and an offset cancelling device. Secondly, the potential of integration, the flexibility of reconfiguration as well as the low-noise and high-sensitivity are promising features of the developed concept. Noise performance of 1.8 pT/ Hz was obtained in the white noise region. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
15. Practical Use of the GMI Effect to Make a Current Sensor.
- Author
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Asfour, Aktham, Nabias, Julie, Traore, Papa Silly, and Yonnet, Jean-Paul
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ELECTRIC impedance ,MAGNETIZATION ,MAGNETOSTRICTIVE devices ,MAGNETIC tunnelling ,MAGNETIC fields - Abstract
This paper deals with practical issues and solutions related to the use of the giant magnetoimpedance (GMI) for electrical current measurement. It presents an overview of a full attempt of design and realization of an almost industrial GMI-based current sensor or clamp. The sensor combines dc and ac measurements with the same flexible sensitive element. This paper addresses several practical problems encountered in a real measurement environment. In this context, main attention was paid to the impact of the influence quantities that largely condition the implementation strategies and solutions of the sensor. For the intended industrial application, these influence quantities first include the operating temperature. Its impact on the intrinsic sensor response was investigated in an almost industrial temperature range. Second, bending stress on the sensitive element is another involved influence parameter in the toroidal and flexible structure of the sensor. The effect of this was also characterized. Finally, the third considered influence parameter is the effect of magnetic disturbances. These include the eccentricity of the conductor of interest and the impact of the surrounding magnetic fields such as the earth’s field or fields produced by other conductors in close proximity to the sensor. Different strategies of implementation and solutions, taking into account the impact of influence parameters, were proposed and compared. A sensor prototype was realized, and its first performances were given. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
16. Noise Performance of SDR-Based Off-Diagonal GMI Sensors.
- Author
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Traore, Papa-Silly, Asfour, Aktham, Yonnet, Jean-Paul, and Dolabdjian, Christophe P.
- Abstract
In this paper, we propose a general model to evaluate the equivalent magnetic noise for an off-diagonal giant magneto-impedance (GMI) sensor utilizing a software-defined radio (SDR) as a digital receiver. Based on this SDR approach, an analog-to-digital conversion (ADC) of the voltage induced by the sensing element is directly performed. The signal processing is digitally achieved in real time. It includes a digital quadrature demodulation, a decimation, and a filtering. The approach allows to give the key rules for quantifying the white noise level of this digital implementation. The voltage noise spectral density of the ADC and of each SDR stage is given. The white noise level expected by the modeling was in good agreement with the measurements. With a sensing element composed of a 400 turn coil wound around a co-rich GMI wire, equivalent magnetic noise levels of 220 and 4.2 pT/ \sqrt Hz were obtained at 1 Hz and in the white noise region, respectively. The potential improvement of these performances, allowed by this digital conditioning, as well as limitations is also discussed. [ABSTRACT FROM PUBLISHER]
- Published
- 2017
- Full Text
- View/download PDF
17. Off-Diagonal GMI Sensors With a Software-Defined Radio Detector: Implementation and Performance.
- Author
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Traore, Papa Silly, Asfour, Aktham, and Yonnet, Jean-Paul
- Subjects
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GIANT magnetoimpedance effect , *RADIO detectors , *PERFORMANCE , *SOFTWARE radio , *DYNAMIC range (Acoustics) , *WIRELESS communications - Abstract
The implementation and the performance of a software-defined radio (SDR) detector for the signal demodulation and processing in off-diagonal GMI sensors are presented. One of the underlying ideas of this SDR is to benefit from the possibility to obtain almost linear and asymmetric characteristics of the off-diagonal component around the zero field. Unlike the commonly used peak detectors, the implemented SDR detector allows retaining this feature, without using any bias field and additional techniques of offset canceling. The key rules for a successful implementation of the SDR detector are given in some details and its potential is addressed. The first performances of the sensor are given and discussed. These include response, sensitivity, and noise as well as dynamic range, linearity, and slew rate. [ABSTRACT FROM PUBLISHER]
- Published
- 2017
- Full Text
- View/download PDF
18. Implementation of the Digital-Down-Conversion (DDC) and software for the optimization of the Giant Magneto-Impedance (GMI) sensors.
- Author
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Traore, Papa Silly, Asfour, Aktham, and Yonnet, Jean-Paul
- Published
- 2015
- Full Text
- View/download PDF
19. Current source dedicated for direct digital synthesizers: Application to the giant magneto-impedance (GMI) sensors.
- Author
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Asfour, Aktham, Yonnet, Jean-Paul, Zidi, Manel, Nabias, Julie, and Traore, Papa Silly
- Published
- 2015
- Full Text
- View/download PDF
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