Fiber bragg grating osmometer
A fiber grating and osmometer technology, which is applied to the fluid pressure measurement using optical methods, the use of optical devices to transmit sensing components, and the elastic deformation meter type fluid pressure measurement, etc. Complex, poor repeatability of elastic materials, etc., to achieve good waterproof performance, improve measurement accuracy and measurement reliability, and good waterproof performance.
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[0021] The present invention will be further described below in conjunction with the drawings and embodiments:
[0022] A fiber grating piezometer, such as figure 1 As shown, it includes a housing 1, a pressure rod 3, a grating 4, and a transmission fiber 8. The housing 1 is provided with a pressure inlet 5 and a fiber lead hole 6, and a filter 7 is provided at the pressure inlet 5, which can effectively prevent mud Sand enters into the piezometer; the shell 1 is composed of left, middle and right parts. The left and right parts are connected with the middle part by threads. The two sides of the middle part are welded with diaphragm 2 which can directly feel the pressure inlet Pressure at 5; both ends of the pressure rod 3 are bonded to the center of the diaphragm 2 by a high-strength adhesive, the grating 4 is embedded in the pressure rod 3, the grating 4 is distributed along the axis of the pressure rod 3, and the expansion and contraction of the pressure rod 3 is detected To d...
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