Research on Coil Impedance of Self-Inductive Displacement Sensor Considering Core Eddy Current

Ren, Zongqiang; Li, Hongwei; Yu, Wentao

doi:10.3390/s21186292

Cited by 8 publications

(2 citation statements)

References 30 publications

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“…The resistance of both coils is R . The equivalent circuit of the dual-coil inductive displacement transducer is shown in Figure 5 [ 16 ].…”

Section: Structure and Operating Principle Of A Dual-coil Inductive D...mentioning

confidence: 99%

Effect of the Coil Excitation Method on the Performance of a Dual-Coil Inductive Displacement Transducer

et al. 2023

Sensors

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A dual-coil inductive displacement transducer is a non-contact type measuring element for measuring displacement and is widely used in large power equipment systems such as construction machinery and agricultural equipment. However, the effect of the coil excitation method on the performance of dual-coil inductive displacement sensors has not been studied. This paper investigates the impact of different coil excitation methods on the operating performance of displacement transducers. The working principle, electromagnetic characteristics, and electrical characteristics were analyzed by building a mathematical model. A transducer measurement device was used to determine the relationship between core displacement and coil inductance. Three coil excitation methods were proposed, and the effects of the three coil excitation methods on the amplitude variation, phase shift, linearity, and sensitivity of the output signal were studied by simulation based on the AD630 chip as the core of the conditioning circuit. Finally, the study’s feasibility was demonstrated by comparing the experiment to the simulation. The results show that, under the uniform magnetic field strength distribution in the coil, the coil voltage variation is proportional to the inductive core displacement. The amplitude variation is the largest for the dual-coil series three-wire (DCSTW) and is the same for the dual-coil series four-wire (DCSFW) and dual-coil parallel differential (DCPD). DCSFW has an enormous phase shift. DCSTW has the best linearity. The research in this paper provides a theoretical basis for selecting a suitable coil excitation, which is conducive to further improving the operating performance of dual-coil inductive displacement transducers.

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“…The resistance of both coils is R . The equivalent circuit of the dual-coil inductive displacement transducer is shown in Figure 5 [ 16 ].…”

Section: Structure and Operating Principle Of A Dual-coil Inductive D...mentioning

confidence: 99%

Effect of the Coil Excitation Method on the Performance of a Dual-Coil Inductive Displacement Transducer

et al. 2023

Sensors

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show abstract

“…The slope of the pulse signal is the largest, followed by the sine signal, and the triangular signal is the smallest. This indicates that, within the stroke range, the output voltage of the pulse signal has the largest variation range and the highest sensitivity [ 39 ]. The sensitivity of the sine signals, the triangle signals, and the pulse signals is 0.3798 V/mm, 0.3084 V/mm, and 0.6473 V/mm, respectively.…”

Section: Comparison Of Three Excitation Signalsmentioning

confidence: 99%

Effect of Excitation Signal on Double-Coil Inductive Displacement Transducer

Yang

et al. 2023

Sensors

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A double-coil inductive displacement transducer is a non-contact element for measuring displacement and is widely used in large power equipment systems such as construction machinery and agricultural machinery equipment. The type of coil excitation signal has an impact on the performance of the transducer, but there is little research on this. Therefore, the influence of the coil excitation signal on transducer performance is investigated. The working principle and characteristics of the double-coil inductive displacement transducer are analyzed, and the circuit simulation model of the transducer is established. From the aspects of phase shift, linearity, and sensitivity, the effects of a sine signal, a triangle signal, and a pulse signal on the transducer are compared and analyzed. The results show that the average phase shift, linearity, and sensitivity of the sine signal were 11.53°, 1.61%, and 0.372 V/mm, respectively; the average phase shift, linearity and sensitivity of the triangular signal were 1.38°, 1.56%, and 0.300 V/mm, respectively; and the average phase shift, linearity, and sensitivity of the pulse signal were 0.73°, 1.95%, and 0.621 V/mm, respectively. It can be seen that the phase shift of a triangle signal and a pulse signal is smaller than that of a sine signal, which can result in better signal phase-locked processing. The linearity of the triangle signal is better than the sine signal, and the sensitivity of the pulse signal is better than that of the sine signal.

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Optimal Calculation Method of Coil Impedance for Multi Pole Symmetrical Inductive Sensor with Uneven Air Gap

Chen¹,

Ren²,

Li³

et al. 2023

Lecture Notes in Electrical Engineering

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Research on Coil Impedance of Self-Inductive Displacement Sensor Considering Core Eddy Current

Cited by 8 publications

References 30 publications

Effect of the Coil Excitation Method on the Performance of a Dual-Coil Inductive Displacement Transducer

Effect of the Coil Excitation Method on the Performance of a Dual-Coil Inductive Displacement Transducer

Effect of Excitation Signal on Double-Coil Inductive Displacement Transducer

Optimal Calculation Method of Coil Impedance for Multi Pole Symmetrical Inductive Sensor with Uneven Air Gap

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