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Fbg-based torsion sensor device

A torsion sensor, sensor technology, applied to measuring devices, measuring torque/torsion force, instruments and other directions during tightening, can solve problems such as errors, complex force separation, etc.

Active Publication Date: 2021-06-22
KOREA INST OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, there are not many developed sensors for measuring axial twisting motion using FBG, and when shear force is applied to FBG by twisting, forces due to bending and stretching are also transmitted simultaneously, so it is difficult to These complex force separations
[0010] In addition, there are some cases of numerical processing methods in the method used to separately distinguish the results of complex reflection wavelengths produced by bending and twisting, but the change in wavelength due to bending is much larger than that caused by twisting Variations in the wavelength of , so there is a high risk of errors due to real-time sorting operations
Therefore, in practical applications for real-time 3D motion capture systems, there are limitations in numerically sorting and differentiating large amounts of wavelength variation data and sending position, angle or twist information back to the graphical user interface (GUI) or actual model

Method used

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Embodiment Construction

[0036] Embodiments will be described with reference to the drawings. However, the principles disclosed herein may be implemented in many different forms, and it should be understood that the disclosure is not limited to the embodiments disclosed herein. In the detailed description of the present disclosure, detailed descriptions of well-known features and techniques may be omitted to avoid unnecessary ambiguity about the features of various embodiments.

[0037] In the drawings, each reference numeral designates each element. Shapes, sizes, regions, etc. in the drawings may be exaggerated for clarity.

[0038] The measurement object refers to various objects including, for example, humans, animals, machines, and robots whose whole or part of the object can move and / or move.

[0039] The terms "bent" or "bent" as used herein mean that after bending, the axial center axis of the measurement object deviates from the axial center axis before bending. In this specification, "ben...

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PUM

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Abstract

Embodiments relate to a torsion sensor device which measures a degree of torsion of a measurement object by using a fiber Bragg gratings (FBG) sensor, the sensor device comprising: an FBG sensor including a sensing unit formed in one section of an elongated optical fiber; and a fixing device for fixing and supporting the FBG sensor to cause displacement of the FBG sensor according to motion of the measurement object, wherein the fixing device includes a bending prevention member to enable the sensing unit to have torsion displacement without bending displacement, according to the motion of the measurement object.

Description

technical field [0001] The present disclosure relates to a torsion sensor device, and more particularly to a fiber Bragg grating (FBG) sensor based sensor device for measuring axial torsion of a measurement object. [0002] [description of government-funded research and development] [0003] This research was conducted by KAIST with the support of the Ministry of Science and ICT (Information Communication Technology)'s Global Frontier Research Program (overseen by the National Research Foundation of Korea, Program No. 1711073374). Background technique [0004] Worldwide, 3D motion capture systems can be used in various fields including sports, robotics, medical applications, games, and graphics and animation, and the global market size using 3D motion capture systems is showing a growing trend. [0005] In order to realize a 3D motion capture system, there is a need for technical development of a system for simultaneously measuring whole-body (including upper and lower body...

Claims

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Application Information

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IPC IPC(8): G01L5/24G01L11/02G01L1/24
CPCG01L1/246G01L3/1421G01L5/0061G01L5/24G01L11/025G01L3/12
Inventor 金珍奭梁成旭装旻秀金俊植姜奎敏刘凡材
Owner KOREA INST OF SCI & TECH
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