TY - JOUR
T1 - A new rosette-like eddy current array sensor with high sensitivity for fatigue defect around bolt hole in SHM
AU - Chen, Guolong
AU - Zhang, Weimin
AU - Zhang, Zhijing
AU - Jin, Xin
AU - Pang, Weihan
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2018/3
Y1 - 2018/3
N2 - Boosting the sensitivity of eddy current sensors is one of the challenges of non-destructive testing to improve structure health monitoring. Rosette-like eddy current sensors have the best application prospect in structure health monitoring to detect fatigue-induced defects around a bolt hole. To boost the sensitivity of this kind of sensor, a new rosette-like eddy current array sensor is proposed. Same-direction exciting currents are used to make the eddy current distribution more sensitive to detect defect propagation. Moreover, a new layout of pickup coils and a graph algorithm are proposed to improve the sensor's angular resolution. Through finite element simulation and experimental tests, the eddy current distribution and the output signal during defect propagation of a traditional sensor and a new one are compared. Results show that the proposed sensor has higher sensitivity in detecting defect propagation than the traditional one.
AB - Boosting the sensitivity of eddy current sensors is one of the challenges of non-destructive testing to improve structure health monitoring. Rosette-like eddy current sensors have the best application prospect in structure health monitoring to detect fatigue-induced defects around a bolt hole. To boost the sensitivity of this kind of sensor, a new rosette-like eddy current array sensor is proposed. Same-direction exciting currents are used to make the eddy current distribution more sensitive to detect defect propagation. Moreover, a new layout of pickup coils and a graph algorithm are proposed to improve the sensor's angular resolution. Through finite element simulation and experimental tests, the eddy current distribution and the output signal during defect propagation of a traditional sensor and a new one are compared. Results show that the proposed sensor has higher sensitivity in detecting defect propagation than the traditional one.
KW - Eddy current testing
KW - Non-destructive testing
KW - Rosette-like eddy current array sensor
KW - Structure health monitoring
UR - http://www.scopus.com/inward/record.url?scp=85037691405&partnerID=8YFLogxK
U2 - 10.1016/j.ndteint.2017.12.001
DO - 10.1016/j.ndteint.2017.12.001
M3 - Article
AN - SCOPUS:85037691405
SN - 0963-8695
VL - 94
SP - 70
EP - 78
JO - NDT and E International
JF - NDT and E International
ER -