Sensors, Vol. 20, Pages 5246: Braided Fabrication of a Fiber Bragg Grating Sensor

Sensors, Vol. 20, Pages 5246: Braided Fabrication of a Fiber Bragg Grating Sensor
Sensors doi: 10.3390/s20185246
Authors:
Songbi Lee
Joohyeon Lee

Our objective was to construct textile braiding manufacturing methods to facilitate high precision and accurate measurements using optical fiber Bragg grating sensors for various structures. We aimed to combine three-dimensional (3D) braiding processing with the optical Bragg grating sensor’s accurate metrology. Outside the limits of the sensor’s epoxy attachment methods, the textile braiding method can diversify the scope of application. The braiding process can be used to design a 3D fabric module process for multiple objective mechanical fiber arrangements and material characteristics. Optical stress–strain response conditions were explored through the optimization of design elements between the Bragg grating sensor and the braiding. Here, Bragg grating sensors were located 75% away from the fiber center. The sensor core structure was helical with a 1.54 cm pitch, and a polyurethane synthetic yarn was braided together with the sensor using a weaving machine. From the prototype results, a negative Poisson’s ratio resulted in a curled braided Bragg grating sensor. The number of polyurethane strands was studied to determine the role of wrap angle in the braiding. The 12-strands condition showed an increase in double stress–strain response rate at a Poiss...

Source: Sensors - September 13, 2020 Category: Biotechnology Authors: Songbi Lee Joohyeon Lee Tags: Article Source Type: research