Optical pressure sensor
AssigneeSuncall Corporation
InventorsMasahito Wakahara, Takahiro Imasaki
Life of this patent
Estimating the term…
Abstract
The present invention aims to provide an optical pressure sensor capable of detecting a more minute pressure change. A base film is formed with a through hole passing first and second surfaces, an optical fiber is fixed to the base film at a region other than the FBG portion such that the FBG portion is positioned on the through hole in plan view. The optical pressure sensor according to the present invention is attached to an object body such that the second surface of the base film is closely attached to a surface of the object body directly or indirectly.
Claims25
An optical pressure sensor comprising a base film that includes first and second surfaces, the second surface being closely attached to a surface of an object body directly or indirectly;
- and an optical fiber that has at least one FBG portion and that is fixed to the base film, wherein
- the base film is formed with a through hole passing through the first and second surfaces, and
- the optical fiber is fixed to the base film at a region other than the FBG portion such that the FBG portion is positioned on the through hole in plan view.
An optical pressure sensor comprising a base member fixedly attached to an object body, and an optical fiber that has at least one FBG portion and that is fixed to the base member, wherein
- the base member includes a sealed space in which a surface facing an external pressure to be measured is covered with a flexible first cover film,
- the optical fiber is fixed to the base member at a region other than the FBG portion such that the FBG portion is positioned on the sealed space with the FBG portion contacted to an inner surface of the first cover film, and
- the change of reflection characteristic of the FBG portion is detected in a state where the sealed space is maintained at a reference pressure.
An optical pressure sensor comprising a base member fixedly attached to an object body, and an optical fiber that has at least one FBG portion and that is fixed to the base member, wherein
- the base member includes a sealed space in which a surface facing an external pressure to be measured is covered with a flexible first cover film,
- the optical fiber is fixed to the base member at a region other than the FBG portion such that the FBG portion is positioned on the sealed space with the FBG portion contacted to an outer surface of the first cover film, and
- the change of reflection characteristic of the FBG portion is detected in a state where the sealed space is maintained at a reference pressure.
Dependencies are inferred from the claim text.