Device for optically measuring physical quantity in power equipment and method of manufacturing the same
AssigneeKabushiki Kaisha Toshiba
InventorsSakae Ikuta, Kiyohisa Terai, Masao Takahashi, Keiko Matsumoto
Life of this patent
Estimating the term…
Abstract
A device for optically measuring a physical quantity in power equipment includes an optical fiber associated with the power equipment, an optical part for transmitting/receiving light to/from the optical fiber, calculation unit for calculating a physical quantity in the power equipment by detecting the polarized state of light polarized by the power equipment on the basis of the output from the optical part, a housing box for housing the optical part, and a fixing member to which the optical part is mounted and which is fixed to the housing box by laser welding.
Claims19
A device for optically measuring a physical quantity in power equipment, comprising:
- an optical fiber associated with the power equipment;
- an optical part for transmitting/receiving light to/from said optical fiber;
- calculation means for calculating a physical quantity in the power equipment by detecting a polarized state of light polarized by the power equipment on the basis of an output from said optical part;
- a housing box being made of a magnetic metal, for housing said optical part;
- and
- a fixing member to which said optical part is mounted and which is fixed to said housing box by laser welding using a metal containing no phosphorus.
A device for optically measuring a physical quantity in power equipment including at least a tank and a bus trunk arranged in the tank together with a gas by using an optical fiber, comprising:
- a mount member having an annular shape to oppose an end portion of the tank, arranged for the power equipment, having a size larger than a diameter of said optical fiber, and having a fixing portion in which a groove portion in which said optical fiber is housed is formed;
- said optical fiber housed in the groove portion of the fixing portion of said mount member;
- and
- means for detecting a polarized state of light polarized by the power equipment by transmitting/receiving light to/from said optical fiber, and calculating a physical quantity in the power equipment on the basis of the detection output;
- wherein the fixing portion comprises fixing portions distributed at a plurality of portions in a circumferential direction of said annular mount member.
A device for optically measuring a physical quantity in power equipment including at least a tank and a bus trunk arranged in the tank together with a gas by using an optical fiber, comprising:
- a mount member having an annular shape to oppose an end portion of the tank, arranged for the power equipment, having a size larger than a diameter of said optical fiber, and having a fixing portion in which a groove portion in which said optical fiber is housed is formed;
- said optical fiber housed in the groove portion of the fixing portion of said mount member;
- and
- means for detecting a polarized state of light polarized by the power equipment by transmitting/receiving light to/from said optical fiber, and calculating a physical quantity in the power equipment on the basis of the detection output;
- wherein the fixing portion comprises guide fiber portions for isolating portions of said optical fiber housed in the groove portion from each other, and guiding the isolated fiber portions;
- and
- the guide portions comprise a plurality of cylindrical guides disposed between the fiber portions.
A device for optically measuring a physical quantity in power equipment including at least a tank and a bus trunk arranged in the tank together with a gas by using an optical fiber, comprising:
- a mount member having an annular shape to oppose an end portion of the tank, arranged for the power equipment, having a size larger than a diameter of said optical fiber, and having a fixing portion in which a groove portion in which said optical fiber is housed is formed;
- said optical fiber housed in the groove portion of the fixing portion of said mount member;
- and
- means for detecting a polarized state of light polarized by the power equipment by transmitting/receiving light to/from said optical fiber, and calculating a physical quantity in the power equipment on the basis of the detection output;
- wherein the fixing portion comprises a plurality of disk-like housing portions stacked on each other, each of said disk-like housing portions including the groove portion in one end face.
Dependencies are inferred from the claim text.