A fiber tactile sensor based on Mach-Zehnder interferometer for grasp force control of gripper

Qi Wang; Dagong Jia; Xuejin Li; Caiming Sun; Bing Yan

doi:10.1117/12.2687571

27 November 2023 A fiber tactile sensor based on Mach-Zehnder interferometer for grasp force control of gripper

Qi Wang, Dagong Jia, Xuejin Li, Caiming Sun, Bing Yan

Proceedings Volume 12771, Advanced Sensor Systems and Applications XIII; 127711O (2023) https://doi.org/10.1117/12.2687571
Event: SPIE/COS Photonics Asia, 2023, Beijing, China

Conference Poster

Abstract

In this paper, in order to improve the sensitivity of tactile sensor, we proposed and demonstrated a fiber in-line Mach-Zehnder interferometer (MZI) sensor for the measurement of grasp force. The sensor was fabricated by splicing a section of few-mode fiber (FMF) between two single mode fibers (SMFs). The simulation using Rsoft software shows that the sensor has the best performance with the FMF length is 10mm and the core offset is 5um. The mechanical strength of the sensor is improved by using heat shrink tube at the point of optical fiber fusion splicing. The MZI sensor is embedded in the gripper and the force calibration is carried out by using the piezoresistive sensor. The experiment shows that the sensitivity of the sensor is about 6nm/N. The sensor has many advantages including simple fabrication, low cost, and high sensitivity, demonstrating its great application potential in the fields of Human Machine Interface.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Qi Wang, Dagong Jia, Xuejin Li, Caiming Sun, and Bing Yan "A fiber tactile sensor based on Mach-Zehnder interferometer for grasp force control of gripper", Proc. SPIE 12771, Advanced Sensor Systems and Applications XIII, 127711O (27 November 2023); https://doi.org/10.1117/12.2687571

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