High-Spatial-Resolution Strain Sensor Based on Distance Compensation and Image Wavelet Denoising Method in OFDR
Pengfei Li, Cailing Fu, Bin Du, Jun He, Huajian Zhong, Chao Du, Lei Wang, Yiping Wang
Abstract
A high-spatial-resolution strain sensor in OFDR was experimentally demonstrated by use of combining distance compensation (DC) and image wavelet denoising (IWD) method. Compared with using one method alone, the measured distribution strain could be varied from 200 to 2000 μϵ at a spatial resolution of 2.56 mm. Moreover, four times enhancement of the accuracy for the strain senor was achieved without hardware modification. This method is a significant step toward a high performance OFDR system, especially for evaluating the rapid change of object's structural condition.
Topics & Concepts
Image resolutionWaveletNoise reductionWavelet transformCompensation (psychology)Resolution (logic)Artificial intelligenceComputer visionStrain (injury)Image denoisingMaterials scienceOpticsComputer sciencePhysicsInternal medicinePsychoanalysisPsychologyMedicineAdvanced Optical Sensing TechnologiesAdvanced Fiber Optic SensorsAnalytical Chemistry and Sensors