Planar Eddy Current Sensor Array With Null-Offset

2019 ◽  
Vol 19 (12) ◽  
pp. 4647-4651 ◽  
Author(s):  
Lihui Liu ◽  
Dixiang Chen ◽  
Mengchun Pan ◽  
Wugang Tian ◽  
Wei Wang ◽  
...  
Keyword(s):  
Eddy Current ◽  
Sensor Array ◽  
Current Sensor ◽  
Eddy Current Sensor

scholarly journals Fatigue Crack Length Sizing Using a Novel Flexible Eddy Current Sensor Array

Sensors ◽  
2015 ◽  
Vol 15 (12) ◽  
pp. 32138-32151 ◽  
Author(s):  
Ruifang Xie ◽  
Dixiang Chen ◽  
Mengchun Pan ◽  
Wugang Tian ◽  
Xuezhong Wu ◽  
...  
Keyword(s):  
Fatigue Crack ◽  
Crack Length ◽  
Eddy Current ◽  
Sensor Array ◽  
Current Sensor ◽  
Eddy Current Sensor

Effect of Conformable Substrate Thickness on an Eddy Current Sensor Array’s Output Characteristics

2011 ◽  
Vol 335-336 ◽  
pp. 1503-1507
Author(s):  
Jin Qiang Du ◽  
Yu Ting He ◽  
Hua Ding ◽  
Hai Wei Zhang ◽  
Li Ming Wu
Keyword(s):  
Finite Element ◽  
Eddy Current ◽  
Sensor Array ◽  
Element Model ◽  
Current Sensor ◽  
Substrate Thickness ◽  
Eddy Current Sensor ◽  
Sensor Fabrication ◽  
Output Characteristics ◽  
Couple Method

A finite element model of an eddy current sensor array is built up by electromagnetic-circuit couple method, and the influences of conformable substrate thickness on sensor’s output characteristics are analyzed by the model. It is shown that the amplitude of sensing coils’ output would diminish as substrate thickness increased, besides, the discrepancies of sensing coils’ output also decrease when the substrate becoming thicker. Therefore tt is necessary to make the conformable substrate as thin as possible in sensor fabrication process to enhance the crack inspecting ability of the sensor.

Simulation Analysis of Conformable Substrate on an Eddy Current Sensor Array’s Output Characteristics Based on Finite Element Method

2011 ◽  
Vol 130-134 ◽  
pp. 2724-2728
Author(s):  
Jin Qiang Du ◽  
Yu Ting He ◽  
Hua Ding ◽  
Li Ming Wu ◽  
Qing Shao
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Eddy Current ◽  
Sensor Array ◽  
Simulation Analysis ◽  
Current Sensor ◽  
Finite Element Models ◽  
Eddy Current Sensor ◽  
Output Characteristics ◽  
Couple Method

Finite element models of an eddy current sensor array are built up by electromagnetic-circuit couple method, and the influences of conformable substrate on sensor’s output characteristics are analyzed by those models. It is shown that the model contains the conformable substrate has almost the same output characteristics as the model without it, but the output amplitudes and phases of the former model are higher than the latter. Therefore we can simply the sensor as a single surface to facilitate the analysis, and then revise it to fit to the real sensor.

Simulation Analysis of an Eddy Current Sensor Array Based on Finite Element Method

2011 ◽  
Vol 299-300 ◽  
pp. 1072-1077
Author(s):  
Jin Qiang Du ◽  
Yu Ting He ◽  
Hua Ding ◽  
Hai Wei Zhang ◽  
Li Ming Wu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Eddy Current ◽  
Sensor Array ◽  
Simulation Analysis ◽  
Element Model ◽  
Current Sensor ◽  
Eddy Current Sensor ◽  
Output Characteristics ◽  
Couple Method

A finite element model of an eddy current sensor array is built up by electromagnetic-circuit couple method, and the influences of crack length and frequency on sensor’s output characteristics are analyzed by this model. It is shown that the model established in this paper is reasonable. There would be a change on amplitude and phase when a crack appears below the footprint of sensing coil in metal plane, and the amplitude and phase of sensor coil are increasing gradually as crack propagation. As frequency increased, the differences between the sensing coils’ output become obvious. However, the differences begin decreasing while the frequency above 3MHz approximately. These results will provide a reference for further research and application of the sensor.

scholarly journals A New Method for Measuring the Rotational Angles of a Precision Spherical Joint Using Eddy Current Sensors

Sensors ◽  
2020 ◽  
Vol 20 (14) ◽  
pp. 4020 ◽  
Author(s):  
Penghao Hu ◽  
Linchao Zhao ◽  
Chuxin Tang ◽  
Shanlin Liu ◽  
Xueming Dang ◽  
...  
Keyword(s):  
Eddy Current ◽  
Output Signal ◽  
Sensor Array ◽  
Mechanical Performance ◽  
Model Simulation ◽  
Current Sensor ◽  
Parallel Mechanisms ◽  
Spherical Joint ◽  
Eddy Current Sensor ◽  
Current Sensors

Precision spherical joint is a spherical motion pair that can realize rotation with three degrees of freedom. This joint is widely used in robots, parallel mechanisms, and high-end medical equipment, as well as in aerospace and other fields. However, the rotation orientation and angle cannot be determined when the joint is in passive motion. The real-time determination of the rotation orientation and angle is crucial to the improvement of the motion control accuracy of the equipment where the joint is installed in. In this study, a new measurement method that utilizes eddy current sensors is proposed to identify the special features of the joint ball and realize angle measurements indirectly. The basic idea is to manufacture the specific shape features on the ball without affecting its movement accuracy and mechanical performance. An eddy current sensor array is distributed in the ball socket. When the ball head rotates, the features on the ball opposite to the sensor, as well as the output signal of every eddy current sensor, change. The measurement model that establishes the relationship between the output signal of the eddy current sensor array and the rotation direction and angle of the ball head is constructed by learning and training an artificial neural network. A prototype is developed using the proposed scheme, and the model simulation and feasibility experiment are subsequently performed. Results show that the root mean square angular error of a single axis within a range of ±14° is approximately 20 min, which suggests the feasibility of the proposed method.

2D Eddy current sensor array

2006 ◽  
Vol 39 (4) ◽  
pp. 264-271 ◽  
Author(s):  
Raimond Grimberg ◽  
Lalita Udpa ◽  
Adriana Savin ◽  
Rozina Steigmann ◽  
Valerian Palihovici ◽  
...  
Keyword(s):  
Eddy Current ◽  
Sensor Array ◽  
Current Sensor ◽  
Eddy Current Sensor

Precise on-machine extraction of the surface normal vector using an eddy current sensor array

2016 ◽  
Vol 27 (11) ◽  
pp. 115016 ◽  
Author(s):  
Yongqing Wang ◽  
Meng Lian ◽  
Haibo Liu ◽  
Yangwei Ying ◽  
Xianjun Sheng
Keyword(s):  
Eddy Current ◽  
Sensor Array ◽  
Current Sensor ◽  
Normal Vector ◽  
Eddy Current Sensor ◽  
Surface Normal

Inspection of Surface Rolled Sintered Gears using Eddy-Current Sensor

2013 ◽  
Vol 133 (5) ◽  
pp. 300-306
Author(s):  
Tsutomu Mizuno ◽  
Yuichi Asato ◽  
Sho Goto ◽  
Takashi Watanabe ◽  
Teruie Takemasu ◽  
...  
Keyword(s):  
Eddy Current ◽  
Current Sensor ◽  
Eddy Current Sensor
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