Flexible actuator based on optical fiber bending sensor

A technology of sensors and actuators, applied in passive exercise equipment, program-controlled manipulators, physical therapy, etc., can solve the problems of serious impact on measurement, inability to integrate, immature software actuators, etc., and achieve low self-bending Impedance, improved measurement accuracy, and the effect of good bending properties

Inactive Publication Date: 2019-09-03
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0004] Although soft actuators with flexible structures have very good application prospects in hand motor rehabilitation, the current research on soft actuators is not mature, which is manifested in the fact that there is no suitable sensor to control the bend...

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  • Flexible actuator based on optical fiber bending sensor
  • Flexible actuator based on optical fiber bending sensor
  • Flexible actuator based on optical fiber bending sensor

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0030] see figure 1 , figure 2 and Figure 4 , the soft actuator 18 based on the optical fiber bending sensor provided by the present invention, the soft actuator 18 is used to assist the extension and abduction of the fingers of the human hand, and can assist patients with stroke or hand dysfunction to perform the extension and abduction of the fingers sports. The soft actuator 18 is made ...

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Abstract

The invention belongs to the technical field of hand rehabilitation and flexible robots, and discloses a flexible actuator based on an optical fiber bending sensor. The flexible actuator is a cylinder-like body with a corrugated structure on the surface, and comprises a silica gel shell, two cavity mechanisms and the optical fiber bending sensor, wherein the cavity mechanisms and the optical fiberbending sensor are arranged in the silica gel shell; each cavity mechanism is semi-cylindrical and comprises a silica gel cavity, corrugated folds are formed on the portion, far away from the opticalfiber bending sensor, of the surface of the silica gel cavity, and Kevlar fiber wires are spirally wound around the largest part of the corrugated folds; and the optical fiber bending sensor comprises a PMMA plastic optical fiber, when the surface of the PMMA plastic optical fiber is subjected to pressure, axial deformation generated on the PMMA plastic optical fiber is larger than radial deformation, so that the optical fiber bending sensor is not influenced by the pressure when bending measurement is performed. Without being affected by the pressure, the flexible actuator improves measurement accuracy and has good flexibility.

Description

technical field [0001] The invention belongs to the related technical fields of hand rehabilitation and soft robots, and more specifically relates to a soft actuator based on an optical fiber bending sensor. Background technique [0002] Nowadays, the aging of the social population is getting worse, and the number of people with hemiplegia caused by stroke and other diseases is increasing. At the same time, the number of people with impaired hand motor function due to accidents such as production accidents and traffic accidents is also increasing year by year. These patients are often unable to take care of themselves due to limb motor dysfunction, which brings a lot of pressure to the family and society. Robot-assisted rehabilitation training can save a lot of manpower and material resources, and can quantitatively evaluate the patient's rehabilitation progress, and carry out training step by step according to the patient's rehabilitation status. [0003] In hand rehabilit...

Claims

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Application Information

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IPC IPC(8): B25J9/14B25J9/16A61H1/02
CPCA61H1/0285B25J9/142B25J9/1664
Inventor 陈文斌刘成龙刘叶青熊蔡华
Owner HUAZHONG UNIV OF SCI & TECH
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