High-temperature resistant micropressure optical fiber grating sensor
A technology of fiber grating and high temperature resistance, which is applied in the field of high temperature resistant micro-pressure fiber grating sensors, and can solve the problems that pressure sensors are difficult to obtain
Active Publication Date: 2014-12-17
BEIJING RES INST OF TELEMETRY +1
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] At present, there is an urgent need for high-temperature micro-pressure sensors in aerospace and other fields, and it is difficult to obtain pressure sensors that can work above 1,000 degrees Celsius and can detect Pa levels.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] The present invention will be further introduced below in conjunction with the accompanying drawings.
[0015] refer to figure 1 , the high-temperature and micro-pressure sensor includes an alumina frame 1, a porous alumina ceramic 2, a porous alumina ceramic baffle 3 and a fiber grating, and the fiber grating can be further divided into a measuring grating 4 and a compensation grating 5.
[0016] The porous alumina ceramic rod 2 is strip-shaped and uses the porous alumina ceramic baffle 3 as a fulcrum to form a lever structure. The force-bearing end of the lever structure is under the force-receiving hole of the alumina frame 1 for sensing high-temperature micro-pressure gas . The movable end of the lever structure is connected with the measuring grating 4 and the compensating grating 5, and the axial tension of the measuring grating 4 is increased when the force-bearing end is under pressure.
[0017] The difference between the area of the pressure surface of the ...
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 |
Login to View More
Abstract
The invention discloses a high-temperature resistant micropressure optical fiber grating sensor. The high-temperature resistant micropressure optical fiber grating sensor is characterized by comprising a porous aluminum oxide frame, a porous aluminum oxide ceramic rod, a porous aluminum oxide ceramic retaining plate and an optical fiber grating, the porous aluminum oxide ceramic rod form a level structure by utilizing the porous aluminum oxide ceramic retaining plate as a fulcrum, a stress end of the lever structure is arranged below a stress hole of a metal frame and used for sensing high-temperature micropressure gas, a movable end of the lever structure is connected with the optical fiber grating so that the optical fiber grating stays at tension state when without external gas pressure, and when the stress end is stressed by external pressure, tension on the optical fiber grating is increased, and reflecting wavelength of the optical fiber grating changes. The high-temperature resistant micropressure optical fiber grating sensor can realize detection of pascal-order pressure in the high-temperature environment.
Description
technical field [0001] The invention relates to a high-temperature resistant micro-pressure optical fiber grating sensor. Background technique [0002] Fiber Bragg grating sensors are widely welcomed for their advantages of small size, light weight, and high sensitivity. The fiber grating has a diameter of 125 microns and is mainly made of silica. Porous alumina ceramics have high temperature resistance (1850°C), low thermal conductivity, high compressive strength, and have the advantages of easy processing. [0003] At present, there is an urgent need for high-temperature micro-pressure sensors in aerospace and other fields, but it is difficult to obtain pressure sensors that can work above 1,000 degrees Celsius and can detect Pa levels. Contents of the invention [0004] The technical solution of the present invention is to provide a high-temperature-resistant micro-pressure fiber grating sensor for the deficiencies of the prior art, which can realize the detection 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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01L11/02
Inventor 史青王东礼孙舟璐郑林陈青松
Owner BEIJING RES INST OF TELEMETRY