Temperature Drift Compensation for Exponential Hysteresis Characteristics of High-Temperature Eddy Current Displacement Sensors

Zheng, Shiqiang; Liu, Ximing; Zhang, Yiming; Han, Bangcheng; Shi, Yangyang; Xie, Jinjin

doi:10.1109/jsen.2019.2933347

Cited by 31 publications

(19 citation statements)

References 22 publications

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“…Due to the symmetry of the bridge arm, an AC bridge circuit is usually used as a detection circuit [14,15]. However, this method has limitations and will incur extra temperature drift [16,17]. Considering the common mode noise is effectively suppressed and the effective differential signal is retained in the differential circuit, the bridge circuit and differential detection circuit are combined in this paper, and the bridge differential inductance detection circuit is employed as shown in Figure 2.…”

Section: Principle Of Electronic Circuitsmentioning

confidence: 99%

An Implementation Method for an Inductive Proximity Sensor with an Attenuation Coefficient of 1

Zhao¹,

Fang²,

Yang³

et al. 2020

Energies

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In order to achieve long-distance measurement, a bridge differential inductance detection circuit is employed; on this basis, an automatic zero adjustment technique for sensors using an integral–proportional-integral controller is proposed in this work to achieve consistent product production and efficient installation and debugging, and the mathematical model of the bridge differential inductance detection circuit is established to effectively design the controller parameters. Furthermore, an implementation method for an inductive proximity sensor with an attenuation coefficient of 1 is also proposed based on the bridge differential inductance detection circuit by querying the proximity distance table in the field-programmable gate array (FPGA) to detect multiple target metal objects at the same inductive distance. Simulation and experimental results show that the proposed method is correct and effective.

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Section: Principle Of Electronic Circuitsmentioning

confidence: 99%

An Implementation Method for an Inductive Proximity Sensor with an Attenuation Coefficient of 1

Zhao¹,

Fang²,

Yang³

et al. 2020

Energies

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“…For example, in [18], a method based on binary regression is proposed to compensate the temperature drift effects of the sensing coil. Meanwhile, in [19], a dual-coil solution to compensate for the exponential hysteresis characteristic of the temperature drift errors of ECDSs operating in high-temperature environments is proposed. One coil is used as a displacement sensing coil, while the second one senses the distance from a compensation plate determined to have the same thermal hysteresis due to the combination of the thermal drift of the sensing coil and the thermal drift of the zone of the target where the eddy currents are induced.…”

Section: Related Workmentioning

confidence: 99%

Effects of the Target on the Performance of an Ultra-Low Power Eddy Current Displacement Sensor for Industrial Applications

2020

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The demand for smart, low-power, and low-cost sensors is rapidly increasing with the proliferation of industry automation. In this context, an Ultra-Low Power Eddy Current Displacement Sensor (ULP-ECDS) targeting common industrial applications and designed to be embedded in wireless Industrial Internet of Things (IIoT) devices is presented. A complete characterization of the realized ULP-ECDS operating with different metallic targets was carried out. The choice of the considered targets in terms of material and thickness was inspired by typical industrial scenarios. The experimental results show that the realized prototype works properly with extremely low supply voltages, allowing for obtaining an ultra-low power consumption, significantly lower than other state-of-the-art solutions. In particular, the proposed sensor reached the best resolution of 2 µm in case of a carbon steel target when operated with a supply voltage of 200 mV and with a power consumption of 150 µW. By accepting a resolution of 12 µm, it is possible to further reduce the power consumption of the sensor to less than 10 µW. The obtained results also demonstrate how the performances of the sensor are strongly dependent on both the target and the demodulation technique used to extract the displacement information. This allowed for defining some practical guidelines that can help the design of effective solutions considering application-specific constraints.

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“…As a result, effective methods for compensating for the thermal drift effect are required to ensure the reliability of the sensor measurements. Many temperature compensation schemes have been proposed [ 11 , 12 ]. Wang and Fang [ 13 ] proposed a method for reducing the thermal drift of an EC displacement sensor by two orders of magnitude by decoupling the impedance of the sensing coil into two physical quantities, namely the resistance and the inductance.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Small Size Eddy Current Displacement Sensor

Wang

Xie

Huang

2022

Sensors

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A systematic method is employed for the design and analysis of a small size eddy current (EC) displacement sensor. Simulations are first performed to determine the optimal winding structure and dimensions of the sensor. A linear-fitting approach is then developed for converting the AC displacement signal of the sensor to a DC signal. Finally, a compensation method is proposed for mitigating the temperature drift of the EC sensor under different working temperatures. The experimental results show that the proposed sensor has a sensitivity of approximately 3 μm, a working temperature range of 25–55 °C, and a linearity of ±1.025%.

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Temperature Drift Compensation for Exponential Hysteresis Characteristics of High-Temperature Eddy Current Displacement Sensors

Cited by 31 publications

References 22 publications

An Implementation Method for an Inductive Proximity Sensor with an Attenuation Coefficient of 1

An Implementation Method for an Inductive Proximity Sensor with an Attenuation Coefficient of 1

Effects of the Target on the Performance of an Ultra-Low Power Eddy Current Displacement Sensor for Industrial Applications

Design and Analysis of Small Size Eddy Current Displacement Sensor

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