Apparatus for sensing a motion

a technology of motion and apparatus, applied in the field of apparatus for sensing motion, can solve problems such as the change of strain of the bragg grating

Inactive Publication Date: 2011-11-10
ENG CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Enables the detection of longitudinal motion in the oesophagus by converting local longitudinal movements into strain changes in the Bragg grating, providing accurate information on the movement of a bolus and the oesophageal wall, which was previously not possible with existing devices.

Problems solved by technology

A local longitudinal movement of an external medium that is in frictional contact with the contact region (ether directly or indirectly) effects a longitudinal movement of that portion relative to the holding portion and results in a change in strain of the Bragg grating.

Method used

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  • Apparatus for sensing a motion
  • Apparatus for sensing a motion
  • Apparatus for sensing a motion

Examples

Experimental program
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Embodiment Construction

[0055]Referring initially to FIG. 1, a system for sensing a motion according to a specific embodiment of the present invention is now described. The system 100 comprises a light source 102 which in this embodiment is a broadband light source commonly referred to as a “white” light source even though the light that is emitted by the light source 102 may have any wavelength range.

[0056]The light is directed via optical circulator 104 to a series of apparatus for sensing a motion 106. In a variation of this embodiment the optical circulator 104 may be replaced by an optical coupler, an optical splitter or an optical beam splitter.

[0057]Each apparatus 107 of the series 106 comprises a Bragg grating 108 which are formed in an optical fibre portion 110. Side-portions of the apparatus 107 frictionally engage with a medium, such as the oesophagus, that in use surrounds the apparatus 107. A local change in force or strain, associated with a longitudinal motion, may be applied from the oesoph...

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Abstract

The present disclosure provides an apparatus for sensing a motion. The apparatus comprises an optical fibre portion comprising a Bragg grating and an element for reducing an impact of an external force that is transversal to the Bragg grating. Further, the apparatus comprises a contact region arranged so that movement of a further region, that is in direct or indirect contact with the contact region and moves in a direction along a portion of the apparatus, causes movement of the optical fibre portion at the contact region. The apparatus also comprises a holder arranged for reducing movement of the optical fibre portion at a holding region when the optical fibre portion is moved at the contact surface. The apparatus is arranged so that movement of the contact region relative to the holding region causes a change in strain of the Bragg grating.

Description

FIELD OF THE INVENTION[0001]The present invention broadly relates to an apparatus for sensing a motion.BACKGROUND OF THE INVENTION[0002]The human body has many regions in which pressure differences cause matter to move. For example, the human heart pumps blood through the body. Muscles around the alimentary canal apply a pressure to the canal, which moves food from the mouth into the stomach.[0003]Monitoring pressures and motion in the human body can provide important information about the function of the human body and can be used to detect disorders and diseases or can be used to control a recovery from a disease.[0004]Optical devices for monitoring pressures within a body lumen are now being developed. Such optical devices are typically very narrow and consequently do not cause too much discomfort to a patient. The optical devices may comprise an optical fibre Bragg grating, which has an optical response that depends on a strain of the Bragg grating. The strain of the Bragg grati...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): G02B6/00
CPCA61B5/037A61B5/1107A61B2562/0266A61B2562/043G01L1/246G02B6/022G01B11/18
InventorARKWRIGHT, JOHN WILLIAM
OwnerENG CORP