Abstract
The property that SiC electroluminescent intensity is enhanced with an increase of electric field motivates to propose a novel method for online detection of surface electric field distribution in the SiC stress-grading coating. The electric field distortion on the measurement spots is minimized by the insulated plastic optical fibre as the probe collects the electroluminescence of the SiC stress-grading coating. The self-designed measuring system primarily contains optical-electrical converter, signal amplifier and signal processing unit. The relation between the peak-peak values of the electroluminescence signal and the electric field of special spots of the stress-grading coating follows the logarithm law. When the method is applied to one and three orders SiC stress-grading coating, the measured values agree well with the calculated ones on the various spots, indicating the accuracy and reliability of this method.
| Original language | English |
|---|---|
| Pages (from-to) | 1120-1124 |
| Number of pages | 5 |
| Journal | Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University |
| Volume | 40 |
| Issue number | 10 |
| State | Published - Oct 2006 |
Keywords
- Electric field distribution
- Electroluminescence
- Online measurement
- SiC stress-grading coating