Shieldless Eddy-Current Displacement Sensor with Improved Measurement Sensitivity

Johan G. Vogel; Vikram Chaturvedi; Stoyan Nihtianov

doi:10.1109/ET.2018.8549631

Shieldless Eddy-Current Displacement Sensor with Improved Measurement Sensitivity

Johan G. Vogel, Vikram Chaturvedi, Stoyan Nihtianov

Electronic Instrumentation

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

Abstract

The major limitations of eddy-current displacement sensors, such as low measurement sensitivity and low stability, can be mitigated by using low-inductance flat coils in combination with a ratiometric measurement and a high excitation frequency, thus making eddy-current sensors of interest for high-precision applications. For the ratiometric measurement, the sensing coil is used in combination with a constant inductance reference coil, which are magnetically isolated from each other by a shield. In this paper, the implications of omitting the shield are studied. It is shown that a shieldless design brings several advantages related to sensitivity, compactness and manufacturability.

Original language	English
Title of host publication	2018 IEEE 27th International Scientific Conference Electronics, ET 2018 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Number of pages	4
ISBN (Electronic)	978-153866692-0
DOIs	https://doi.org/10.1109/ET.2018.8549631
Publication status	Published - 2018
Event	27th IEEE International Scientific Conference Electronics, ET 2018 - Sozopol, Bulgaria Duration: 13 Sept 2018 → 15 Sept 2018

Conference

Conference	27th IEEE International Scientific Conference Electronics, ET 2018
Country/Territory	Bulgaria
City	Sozopol
Period	13/09/18 → 15/09/18

Keywords

displacement sensing
eddy-current sensor
magnetic shielding
ratiometric measurement
sensor design

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10.1109/ET.2018.8549631

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title = "Shieldless Eddy-Current Displacement Sensor with Improved Measurement Sensitivity",

abstract = "The major limitations of eddy-current displacement sensors, such as low measurement sensitivity and low stability, can be mitigated by using low-inductance flat coils in combination with a ratiometric measurement and a high excitation frequency, thus making eddy-current sensors of interest for high-precision applications. For the ratiometric measurement, the sensing coil is used in combination with a constant inductance reference coil, which are magnetically isolated from each other by a shield. In this paper, the implications of omitting the shield are studied. It is shown that a shieldless design brings several advantages related to sensitivity, compactness and manufacturability.",

keywords = "displacement sensing, eddy-current sensor, magnetic shielding, ratiometric measurement, sensor design",

author = "Vogel, {Johan G.} and Vikram Chaturvedi and Stoyan Nihtianov",

year = "2018",

doi = "10.1109/ET.2018.8549631",

language = "English",

booktitle = "2018 IEEE 27th International Scientific Conference Electronics, ET 2018 - Proceedings",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

address = "United States",

note = "27th IEEE International Scientific Conference Electronics, ET 2018 ; Conference date: 13-09-2018 Through 15-09-2018",

}

Vogel, JG, Chaturvedi, V & Nihtianov, S 2018, Shieldless Eddy-Current Displacement Sensor with Improved Measurement Sensitivity. in 2018 IEEE 27th International Scientific Conference Electronics, ET 2018 - Proceedings., 8549631, Institute of Electrical and Electronics Engineers (IEEE), 27th IEEE International Scientific Conference Electronics, ET 2018, Sozopol, Bulgaria, 13/09/18. https://doi.org/10.1109/ET.2018.8549631

Shieldless Eddy-Current Displacement Sensor with Improved Measurement Sensitivity. / Vogel, Johan G.; Chaturvedi, Vikram; Nihtianov, Stoyan.
2018 IEEE 27th International Scientific Conference Electronics, ET 2018 - Proceedings. Institute of Electrical and Electronics Engineers (IEEE), 2018. 8549631.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - Shieldless Eddy-Current Displacement Sensor with Improved Measurement Sensitivity

AU - Vogel, Johan G.

AU - Chaturvedi, Vikram

AU - Nihtianov, Stoyan

PY - 2018

Y1 - 2018

N2 - The major limitations of eddy-current displacement sensors, such as low measurement sensitivity and low stability, can be mitigated by using low-inductance flat coils in combination with a ratiometric measurement and a high excitation frequency, thus making eddy-current sensors of interest for high-precision applications. For the ratiometric measurement, the sensing coil is used in combination with a constant inductance reference coil, which are magnetically isolated from each other by a shield. In this paper, the implications of omitting the shield are studied. It is shown that a shieldless design brings several advantages related to sensitivity, compactness and manufacturability.

AB - The major limitations of eddy-current displacement sensors, such as low measurement sensitivity and low stability, can be mitigated by using low-inductance flat coils in combination with a ratiometric measurement and a high excitation frequency, thus making eddy-current sensors of interest for high-precision applications. For the ratiometric measurement, the sensing coil is used in combination with a constant inductance reference coil, which are magnetically isolated from each other by a shield. In this paper, the implications of omitting the shield are studied. It is shown that a shieldless design brings several advantages related to sensitivity, compactness and manufacturability.

KW - displacement sensing

KW - eddy-current sensor

KW - magnetic shielding

KW - ratiometric measurement

KW - sensor design

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U2 - 10.1109/ET.2018.8549631

DO - 10.1109/ET.2018.8549631

M3 - Conference contribution

AN - SCOPUS:85059991251

BT - 2018 IEEE 27th International Scientific Conference Electronics, ET 2018 - Proceedings

PB - Institute of Electrical and Electronics Engineers (IEEE)

T2 - 27th IEEE International Scientific Conference Electronics, ET 2018

Y2 - 13 September 2018 through 15 September 2018

ER -

Shieldless Eddy-Current Displacement Sensor with Improved Measurement Sensitivity

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Keywords

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