Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

A Study on the Braided Fabrication of Fiber Bragg Grating Sensor

Version 1 : Received: 4 August 2020 / Approved: 5 August 2020 / Online: 5 August 2020 (10:08:12 CEST)

How to cite: Joohyeon, L. A Study on the Braided Fabrication of Fiber Bragg Grating Sensor . Preprints 2020, 2020080122 (doi: 10.20944/preprints202008.0122.v1). Joohyeon, L. A Study on the Braided Fabrication of Fiber Bragg Grating Sensor . Preprints 2020, 2020080122 (doi: 10.20944/preprints202008.0122.v1).

Abstract

This study's objective was to propose the use of textile braiding manufacturing methods, thus facilitating the application of the high precision and accurate measurability of optical fiber Bragg grating sensors to various structures. The purpose of this study was to Combine 3d braid processing with the optical Bragg grating sensor's accurate metrology. Out of limits of the sensor's epoxy attachment methods, the textile braiding method can make applicable scope diversify. The braiding processing is capable of designing a 3D fabric module processing, multiple objective mechanical fiber arrangement, and material characteristics. Optical stress-strain response conditions were explored through the optimization of design elements between the Bragg grating sensor and braiding. For this study, Bragg grating sensors were located 75% apart from the fiber center. The sensor core structure is helical of 1.54 pitch. A polyurethane synthetic yarn was braided together with the sensor on the Weaving machine core part in a braiding. Prototyping results, a negative Poisson's ratio makes curled the braided Bragg grating sensor. The number of polyurethane string yarns has been conducted the role of wrap angle in braiding. The 12 strands condition showed an increase in double stress-strain response rate at a Poisson ratio of 1.3%, and 16 strands condition was found to affect the sensor with noise at a Poisson ratio of 1.5%. This study can suggest applying braid processing of the Bragg grating sensor, which is expected to create and develop a new monitoring sensor.

Subject Areas

bragg grating sensor; auxetic sensor; silica helical core; wrap angle; braid angle

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