Output Voltage Characteristics of Eddy Current Displacement Sensor for Various Heat Treatments of Measuring Objects

2008 ◽  
Vol 128 (4) ◽  
pp. 289-297 ◽  
Author(s):  
Tsutomu Mizuno ◽  
Shigemi Enoki ◽  
Takashi Asahina ◽  
Takayuki Suzuki ◽  
Hiroyuki Maeda ◽  
...  
Keyword(s):  
Eddy Current ◽  
Output Voltage ◽  
Heat Treatments ◽  
Displacement Sensor

Influence of rail wear on output voltage of eddy-current rail displacement sensor

2015 ◽  
Author(s):  
Yoshifumi Shimojima ◽  
Yinggang Bu ◽  
Tsutomu Mizuno ◽  
Takafumi Asahi ◽  
Makoto Ito ◽  
...  
Keyword(s):  
Eddy Current ◽  
Output Voltage ◽  
Displacement Sensor ◽  
Rail Wear

Analysis of Temperature Characteristics of Eddy-Current Displacement Sensor in which Chromium Molybdenum Steel is Assumed to be Measuring Object

2010 ◽  
Vol 130 (9) ◽  
pp. 818-824
Author(s):  
Hiroki Shinagawa ◽  
Yusuke Shimura ◽  
Kenta Deguchi ◽  
Shigemi Enoki ◽  
Tsutomu Mizuno
Keyword(s):  
Eddy Current ◽  
Displacement Sensor ◽  
Temperature Characteristics ◽  
Molybdenum Steel

Temperature Invariant Phenomenon in Dual Coil Eddy Current Displacement Sensor: Investigation, Verification and Application

2019 ◽  
Vol 19 (21) ◽  
pp. 9680-9687 ◽  
Author(s):  
Yating Yu ◽  
Hanchao Li ◽  
Ke Xue ◽  
Dahuan Liu ◽  
Geng Gao
Keyword(s):  
Eddy Current ◽  
Displacement Sensor

scholarly journals High-Accuracy Calibration Based on Linearity Adjustment for Eddy Current Displacement Sensor

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2842 ◽  
Author(s):  
Wei Liu ◽  
Bing Liang ◽  
Zhenyuan Jia ◽  
Di Feng ◽  
Xintong Jiang ◽  
...  
Keyword(s):  
Eddy Current ◽  
Measurement Accuracy ◽  
Characteristic Curve ◽  
Calibration Method ◽  
High Accuracy ◽  
Output Characteristic ◽  
Displacement Sensor ◽  
Support Vector ◽  
Displacement Sensors ◽  
Calibration Accuracy

High precision position control is essential in the process of parts manufacturing and assembling, where eddy current displacement sensors (ECDSs) are widely used owing to the advantages of non-contact sensing, compact volume, and resistance to harsh conditions. To solve the nonlinear characteristics of the sensors, a high-accuracy calibration method based on linearity adjustment is proposed for ECDSs in this paper, which markedly improves the calibration accuracy and then the measurement accuracy. After matching the displacement value and the output voltage of the sensors, firstly, the sensitivity is adjusted according to the specified output range. Then, the weighted support vector adjustment models with the optimal weight of the zero-scale, mid-scale and full-scale are established respectively to cyclically adjust the linearity of the output characteristic curve. Finally, the final linearity adjustment model is obtained, and both the calibration accuracy and precision are verified by the established calibration system. Experimental results show that the linearity of the output characteristic curve of ECDS adjusted by the calibration method reaches over 99.9%, increasing by 1.9–5.0% more than the one of the original. In addition, the measurement accuracy improves from 11–25 μ m to 1–10 μ m in the range of 6mm, which provides a reliable guarantee for high accuracy displacement measurement.

scholarly journals Improving Angular Accuracy of a Scanning Mirror Based on Error Modeling and Correction

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 367 ◽  
Author(s):  
Yue Fan ◽  
Wenli Ma ◽  
Ping Jiang ◽  
Jinlong Huang ◽  
Kewei Chen ◽  
...  
Keyword(s):  
Eddy Current ◽  
Correction Method ◽  
Calculation Model ◽  
Error Model ◽  
Error Modeling ◽  
Angular Error ◽  
Displacement Sensor ◽  
Physical Parameters ◽  
Loop Control ◽  
Scanning Mirror

Scanning mirrors appear to be key components in optoelectronic systems for line-of-sight (LOS) stabilization. For improving the angular accuracy of a scanning mirror based on the eddy current displacement sensor measurement, an angular error-correction method is proposed and demonstrated. A mathematic angular error model with physical parameters was developed, and the cross-validation method was employed to determine the reasonable order of the Maclaurin series used in the error model, which increased the exactitude and robustness of the correction method. The error parameters were identified by accurately fitting the calibrated angular errors with the error model, which showed excellent error prediction performance. Based on the angular calculation model corrected by the error model, the closed-loop control system was established to obtain accurate deflection angles. Experimental results show that within the deflection angle of ±1.5 deg, the angular accuracy was improved from 0.28 deg to less than 1.1 arcsec, and the standard deviation for six measurements was less than 1.2 arcsec, which indicates that the angle correction method was effective in improving the linearity of the eddy current sensors and reducing the influence of manufacturing and installation errors.

Demodulation Techniques for Self-Oscillating Eddy-Current Displacement Sensor Interfaces: A Review

2017 ◽  
Vol 17 (9) ◽  
pp. 2617-2624 ◽  
Author(s):  
Vikram Chaturvedi ◽  
Mohammad Reza Nabavi ◽  
Johan G. Vogel ◽  
Stoyan Nihtianov
Keyword(s):  
Eddy Current ◽  
Displacement Sensor ◽  
Sensor Interfaces
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