Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

One-dimensional palpation force sensor based on fiber Bragg grating

An optical fiber Bragg and force sensor technology, which is applied in the direction of force measurement, instrument, and force measurement by measuring the change of optical properties of materials when they are stressed, which can solve the problem of difficult to achieve accuracy and repeatability, difficult clinical application, and limited resolution. and other problems, to achieve high sensitivity and linearity, high resolution, and improve the effect of output signals

Pending Publication Date: 2021-12-17
TIANJIN UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the light intensity modulated sensor usually has the shortcomings of limited resolution and small measurement range, which brings certain difficulties to clinical application.
According to the working principle of light intensity modulation sensor, this kind of fiber optic sensor is sensitive to the loss of fiber bending and the change of input light intensity, which makes it prone to undesired wavelength drift, and it is difficult to achieve high accuracy and repeatability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • One-dimensional palpation force sensor based on fiber Bragg grating
  • One-dimensional palpation force sensor based on fiber Bragg grating
  • One-dimensional palpation force sensor based on fiber Bragg grating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Such as figure 1 As shown, a one-dimensional palpal sensor based on the fiber Bragg grating is mainly composed of a contact member 1, a force sensitive flexible member 2, a fiber Bragg grating 3, and a support member 4; wherein: the contact member 1, force The sensitive flexible member 2 and the support member 4 are sequentially connected in order; specifically:

[0035] like figure 2 As shown, the contact member 1 is composed of a contact head 11 and a first hollow cylinder 12 connected to the contact head 11;

[0036] like image 3As shown, the force sensitive flexible member 2 includes a first fiber fixing portion 21, a rigid SARRUS mechanism 23 and a second hollow cylinder 24, and a second hollow cylinder 24; wherein the first fiber fixing portion 21 is The end of the flexible SARRUS mechanism 23; the flexible SARRUS mechanism 23 includes four flexible hinges that are uniformly arranged at 90 ° in the circumferential direction, the second hollow cylinder 24 to...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a one-dimensional palpation force sensor based on a fiber bragg grating. The sensor comprises a contact part, a force-sensitive flexible part, a fiber bragg grating and a support part, and is characterized in that the contact part, the force-sensitive flexible part and the support part are connected in sequence; the force-sensitive flexible part is formed by carrying out a configuration comprehensive design on a sarrus mechanism by adopting a rigid body replacement method, and is used for converting a contact force signal into a strain signal; the fiber bragg grating is suspended in the center of the force-sensitive flexible part under the action of a pre-tightening force, is used as a sensing element and is used for converting the strain signal into an optical signal; the contact part is provided with a hemispherical tip for concentrating a contact force at one point; and the supporting part is used for supporting and fixing the whole sensor. The force sensor has the advantages of being high in sensitivity, large in measurement range, high in linearity, high in biocompatibility, resistant to electromagnetic interference and the like, and interaction force information between a minimally invasive surgery robot and human tissue can be provided in minimally invasive surgery tissue palpation.

Description

Technical field [0001] The present invention relates to the field of fiber sensing techniques, and more particularly to a one-dimensional tactile sensor having a large measurement range and high resolution, which can be applied to clinical minimally invasive surgery. Background technique [0002] Compared with traditional open surgery, minimally invasive surgery has a small incision, small intraoperative pain, less bleeding, small trauma, and good postoperative effect. Minimally invasive surgical surgery by robots allows doctors to complete surgery more comfortable. Therefore, minimally invasive surgery assisted by robots is an inevitable development trend of surgical surgery. However, at this stage, the minimally invasive surgery robot is operated by the surgeon to directly contact the surgical area. It can only rely on visual feedback to obtain the surface information of the visual field, resulting in the lack of power information, and cannot achieve tumors below the surface of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/24A61B34/00A61B34/30
CPCG01L1/246A61B34/30A61B34/76
Inventor 史超阳唐中心王树新李明
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com