Application of interdigital capacitive sensors for detecting power cable insulation damage

Liu, Yonghong; Huang, Yunzhi; Tang, Rui; Wang, Beibei

doi:10.1109/icma.2015.7237758

Cited by 14 publications

(2 citation statements)

References 6 publications

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“…Figure 1 shows the schematic view of the designed sensor with the IDT capacitor. In the IDT capacitor, the total capacitance is known as equation ( 1) and (2) Liu et al (2015),…”

Section: Theoretical Background 21 Principle Of Sensor Measurementmentioning

confidence: 99%

Measurement of the Deterioration of the Diesel Engine Oil Using the Idt Capacitor Sensor

Lee

Cho

Sin

et al. 2022

Int. J. Res. Granthaalayah

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A capacitor-type engine oil sensor is designed and fabricated to measure the property of the diesel engine oil depending on the vehicle mileage. This sensor has flat structure with the interdigitated (IDT) electrodes for the smooth oil flow and is constructed using printed circuit board (PCB) for the fabrication convenience. For the increased capacitance, the smaller spacing between the electrodes is preferred and determined with 0.5 mm based on the fabrication limit. The device is applied to actual trucks with diesel engine. From the experiment, the capacitance of vehicle A is initially constant and then increased upto approximately 6,000 km. And then, the output is dramatically decreased, which indicates that the engine oil has been degraded and should be replaced. The interval at which the reduction in capacitance occurs varies depending on each vehicle, which means the exchange interval of engine oil is different from each other. The degree of deterioration of the oil is also measured with the viscosity tests and total acid number (TAN) tests, and the results are compatible with the measurement of capacitance. From these results, it has been confirmed that the fabricated IDT capacitor sensor can measure the engine oil conditions depending on the mileage.

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“…Figure 1 shows the schematic view of the designed sensor with the IDT capacitor. In the IDT capacitor, the total capacitance is known as equation ( 1) and (2) Liu et al (2015),…”

Section: Theoretical Background 21 Principle Of Sensor Measurementmentioning

confidence: 99%

Measurement of the Deterioration of the Diesel Engine Oil Using the Idt Capacitor Sensor

Lee

Cho

Sin

et al. 2022

Int. J. Res. Granthaalayah

View full text Add to dashboard Cite

show abstract

“…The parameter optimization of IDC sensors has been performed. Liu et al [18] improved the electric field distribution of the IDC sensor, and the results showed that the optimized sensor can detect water trees. Zhao et al [19] focused on a partially covered IDC sensor, which is used for two-layer nuclear cables.…”

Section: Introductionmentioning

confidence: 99%

Interdigital Capacitive Sensor for Cable Insulation Defect Detection: Three‐Dimensional Modeling, Design, and Experimental Test

et al. 2021

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Due to excellent electrical and mechanical properties, cross-linked polyethylene (XLPE) cables are widely used in power systems. Poor manufacturing techniques in the production and installation of cable joints will cause insulation defects. The interdigital capacitive (IDC) sensor has advantages of simple structure and non-contact with the center conductor and shows great potential for online monitoring on XLPE cables. This paper focuses on the 3D modeling of a fully covered IDC sensor for cable insulation detection. Firstly, a 3D finite element model of the sensor is built, and the electric field distributions are compared with those of the partially covered sensor. For the sensor with more electrode pairs, the sensitivity increases with the sensor length and tends to saturate at the length of 5 cm, while the sensitivity remains constant for the sensor with fewer electrode pairs. Then, the differences between 3D and 2D results are discussed and the sensor parameters are optimized to reduce the influence of the fringe capacitance. The simulation results indicate that air gaps between the sensor and XLPE cable are the main reason of the difference between simulation and experiment. When the electrode width is equal to the gap width, the effects of both the fringing electric field and air gaps are relatively small. Finally, several types of sensors are made and used to detect the cable joint with and without the stress cone dislocation under different excitation voltage frequency. The results show that the measured capacitance decreases with frequency and the capacitance of the cable joint with the defects is smaller than that of the normal cable joint.

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Received signal consideration for the through the earth radio-based underground object detection

Suherman

Rambe

Wijayanto

et al. 2020

J. Phys.: Conf. Ser.

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Underground object detections usually employ ground penetration radar (GPR). However, GPR produces data taken only from the earth’s surface. This paper proposes radio through the earth (TTE) propagation path or received signal profile for three-dimensional detection. The propagation model and the three-dimensional propagation line equation are employed. Collections of transmission paths are classified into two-part, blocked and unblocked signals. Both classified signals are compared for signal processing. The study reveals that a number of the transmission path is a function of vertical edge to probe n, the deep of edge l, and transmitter step s. It is suggested the blocked signal paths are used for signal processing analysis as the volume is usually smaller than the evaluated space.

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Application of interdigital capacitive sensors for detecting power cable insulation damage

Cited by 14 publications

References 6 publications

Measurement of the Deterioration of the Diesel Engine Oil Using the Idt Capacitor Sensor

Measurement of the Deterioration of the Diesel Engine Oil Using the Idt Capacitor Sensor

Interdigital Capacitive Sensor for Cable Insulation Defect Detection: Three‐Dimensional Modeling, Design, and Experimental Test

Received signal consideration for the through the earth radio-based underground object detection

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