Novel inductive eddy current sensor for angle measurement

Wogersien, A.; Samson, Steven Alan; Güttler, J.; Beiftner, S.; Biittgenbach, S.

doi:10.1109/icsens.2003.1278935

Cited by 13 publications

(4 citation statements)

References 1 publication

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“…Linearity gives an indication of how close the calibration curve fits a straight line. The maximum deviation above and below the straight line, V MT and V MB , and the total displacement (∆x), are used to determine linearity, as given by (5). The simulation results shown in Figure 4 support the sensor operation described previously.…”

Section: Modellingsupporting

confidence: 63%

“…Sensing coils are not connected to the excitation coil and a change in induced voltage can be measured using analog to digital converters. These sensors are commonly used to measure lateral displacement [4], rotation [5] and axial displacement [6]. It is also used to detect defects in materials like PCBs [7] and is highly dependent on material properties [8].…”

Section: Introductionmentioning

confidence: 99%

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Design and Optimisation of a PCB Eddy Current Displacement Sensor

2017

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Position sensing is one of the crucial parts of many systems, specifically in an active magnetic bearing. The position is used to control the magnetic forces within an active magnetic bearing to keep a rotor levitated. Sensors used in these systems must be very sensitive and are usually very expensive. In this paper a low cost printed circuit board position sensor is analysed. The sensor uses an excitation coil to establish a magnetic field. Four sensing coils are then used to measure the influence a conducting target has on the magnetic field to enable position sensing. The sensor's magnetic operation is analysed using finite element methods and very good correlation is found with measured results. The effects of the target material and the number of PCB layers are analysed. It is shown that a two layer sensor can produce acceptable sensitivity and linearity.

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Section: Modellingsupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Design and Optimisation of a PCB Eddy Current Displacement Sensor

2017

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“…Grating eddy current displacement sensor uses multi-layer hollow planar coils as stimulators to generate eddy current in conductors and inducts variation of intensity of eddy current and finally outputs electronic signals correlated with lateral displacement [1][2][3]. This kind of sensor has some advantages such as wide measurement range, high sensitivity, and strong resistance against oil or water, etc.…”

Section: Introductionmentioning

confidence: 99%

Error characteristic and its compensation method for GECS measurement system

Liu¹,

Zhao²,

Tao³

et al. 2009

Sensors and Actuators A: Physical

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“…In view of the characteristics of the GECS mentioned above, to overcome the low accuracy of coarse localization of a double-track PDGECS and to avoid large size or complicated structure of a PDGECS, a GECS, the operational principle of which is based on the phase of one track and the code of the other track, is described in this paper (hereinafter, this kind of sensor will be referred to as a combinatorial code grating eddy-current sensor (CCGECS)). The method with phase of one track as precise localization of the PDGECS is adopted by the CCGECS, but the coarse-localization method is improved by using single-track code to realize coarse localization as a replacement of phase difference among multiple tracks as coarse localization of the PDGECS [7][8][9]. The measurement principle of the CCGECS is introduced in section 2.…”

Section: Introductionmentioning

confidence: 99%

Analysis of technical requirements and the self-modification method for a combinatorial code grating eddy-current absolute-position sensor

Liu¹,

Zhao²,

Tao³

et al. 2012

Meas. Sci. Technol.

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In order to overcome the shortcomings of the low coarse-localization accuracy of a phase difference grating eddy-current sensor (PDGECS), a combinatorial code grating eddy-current sensor (CCGECS) is presented in this paper. A single-track code localization method is adopted in a CCGECS to realize the coarse localization of a grating eddy-current sensor (GECS). This method is used as a replacement of the multi-track phase difference localization method in a PDGECS. The measurement principle of a CCGECS is introduced in this paper. The relationship between measurement accuracy and main characteristic parameters of sensor is obtained by mathematical deduction and error analysis, which offers theoretical foundation for design and technical requirements analysis of a sensor. A simple and practical self-modification method is also introduced in this paper. Experimental results show that adoption of a single-track code localization method to realize the coarse localization has greatly improved the coarse-localization accuracy of a GECS, resolved the contradiction between the coarse-localization accuracy and the measurement range caused by the multi-track phase difference localization method, realized the absolute-position measurement for a larger range and at the same time reduced the technical requirements, which lays a solid foundation for mass production of a CCGECS.

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Novel inductive eddy current sensor for angle measurement

Cited by 13 publications

References 1 publication

Design and Optimisation of a PCB Eddy Current Displacement Sensor

Design and Optimisation of a PCB Eddy Current Displacement Sensor

Error characteristic and its compensation method for GECS measurement system

Analysis of technical requirements and the self-modification method for a combinatorial code grating eddy-current absolute-position sensor

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