Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An optical fiber temperature and high sensitivity technology, used in thermometers, clad optical fibers, and optical devices to transmit sensing components, etc., can solve the problems of complex wavelength measurement, and achieve the effects of easy manufacturing, convenient use and simple structure
Inactive Publication Date: 2008-02-20
TIANJIN UNIV
View PDF0 Cites 24 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
The disadvantage of wavelength-encoded optical fiber sensors is that equipment with wavelength demodulation function is required to extract the detected quantity from the wavelength of lig...
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings. As shown in Figure 1, the input single-mode fiber 101 and the output single-mode fiber 105 are standard single-mode communication fibers (G652), with a core diameter of 8.2 μm, a cladding diameter of 125 μm, and a numerical aperture of 0.14. First remove its protective coating, and then use a fiber optic cutter to cut its end face perpendicular to its axis. The core of the multimode fiber is pure silica with a diameter of 125 μm and a length of 55 mm. The cladding 103 of the multimode optical fiber is made of polyimide material with a diameter of 250 μm and a length of 45 mm. Use a fiber cutter to cut its end face perpendicular to its axis. Afterwards, put the single-mode optical fiber and multi-mode optical fiber after end-face treatment into the optical fiber fusion splicer to fuse the three sections of optical fiber together ...
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
Property
Measurement
Unit
Diameter
aaaaa
aaaaa
Thermo-optic coefficient
aaaaa
aaaaa
Login to view more
Abstract
The utility model discloses a high-sensitivity optical fiber temperature transmitter, which belongs to the technical field of fiber optic sensing, and comprises an aluminum or aluminum alloy pipe or box shell; wherein, a segment of multimode optical fiber is arranged hermetically in the pipe or box shell; the core of the multimode optical fiber with a diameter of 50 to 250 Mu m is made of quartz; the covering of the multimode optical fiber is formed by polyimide with a thermo-optical coefficient of minus one ten-thousandth to minus five ten-thousandth per centidegree; one end of the multimode optical fiber is connected with single model input optical fibers, and the other end is connected with single mode output optical fibers; the single mode input and output optical fibers are bonded with the ports of the pipe or box shell with epoxy resin adhesives. The utility model has the advantages of simple structure, easy manufacture, and convenient use. In addition, the utility model reaches a sensitivity of minus three point nine fifteen per centidegree, which is several times or decades of times than that of the prior wavelength encoding type optical fiber temperature sensor, meanwhile has the same wavelength encoding and division multiplex as the fiber bragg grating (FBG).
Description
technical field [0001] The invention relates to an optical fiber temperature sensor, in particular to a high-sensitivity optical fiber temperature sensor with wavelength coding characteristics, which belongs to the field of optical fiber sensing. Background technique [0002] Optical fiber sensing has many incomparable advantages to electrical sensors, such as not being affected by electromagnetic fields and other external environmental changes, high sensitivity, small size, good insulation, and distributed measurement, etc., so it has been paid more and more attention. Many physical quantities such as temperature, strain, displacement, humidity, pressure, sound, vibration, etc. can be measured with high precision using fiber optic sensors. Optical fiber sensing has been widely used in construction, petroleum, chemical industry, transportation, energy, metallurgy, medicine, military industry, food, nuclear industry and other fields. [0003] According to its working princip...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more