Novel optical fiber temperature and pressure sensor
A pressure sensor, optical fiber temperature technology, used in thermometers, fluid pressure measurement using optical methods, thermometers with physical/chemical changes, etc. Problems such as processing leveling and polishing
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[0019] image 3 This is a typical connection method for the actual measurement of oil well pressure and temperature in the present invention; the optical fiber temperature and pressure sensor 24 is fixedly welded on the left side of the connecting seat 26 and placed downhole, the right side of the connecting seat 26 is connected with an optical cable 28, and the optical cable 28 is connected with a demodulator 29.
[0020] figure 1 It is a schematic diagram of the overall structure of the optical fiber temperature and pressure sensor, which includes an elastic diaphragm 1, a fiber Bragg grating 10 and a demodulator 29 connected to it. A convex column is arranged in the center of the elastic diaphragm 1, and the elastic diaphragm 1 The edge is sealingly joined to the bell mouth of the front end of the outer protective cylinder 3, and a short connecting tube 2 is fixed on the protruding column, and a hollow rod is fixedly arranged at the other end of the short connecting tube 2, and ...
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