Two-dimensional area array force tactile sensing method based on optical fiber distributed sensing

Abstract

The invention relates to a two-dimensional surface array force tactile sensing method based on optical fiber distributed sensing. The sensor used is a chirped fiber grating two-dimensional force tactile sensing surface array. The chirped fiber gratings at different positions are connected by single-mode fiber, and the reflection spectrum wavelength ranges of different chirped fiber gratings are different. Any position on the axial dimension of each chirped fiber grating and its reflection spectrum bandwidth , and the wavelength of the corresponding point changes when subjected to external pressure, so as to realize the point distribution perception of force touch. The laser signal output by the frequency-sweeping light source with linearly adjustable wavelength is sequentially incident on each chirped fiber grating and Faraday rotation mirror of the chirped fiber grating two-dimensional force tactile sensing array through the coupler, and the reflected light of the chirped grating The reflected light from the Faraday rotator and the Faraday rotator are then input to the photoelectric conversion module through the optical coupler.

Description

technical field [0001] The invention belongs to the technical field of tactile sensing, and is mainly applied to the force tactile sensing technology of robots or intelligent manufacturing. The invention relates to a sensing method for realizing force tactile sensation of a two-dimensional space surface array by using an optical fiber chirped grating as a pressure sensitive element. Background technique [0002] Tactile sensing simulates human skin perception and quantitatively realizes the feeling of contact surface force between sensing units (such as manipulators, bionic tentacles) and objects. It is a sensing technology with small size and high spatial resolution accuracy. At present, with the rapid development of my country's artificial intelligence robot technology, the accuracy and stability of many domestic robot parts can already replace imports. However, there is still a technology that still relies on imports, that is, the tactile sensor technology, which was lis...

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