Fiber grating osmotic pressure sensor with low measuring range

A technology of osmotic pressure sensor and optical fiber grating, which is applied in the direction of displaying liquid level indicator through pressure measurement, fluid pressure measurement using optical method, etc., which can solve the problems of low resolution, linearity of large detection, and inability to detect

Active Publication Date: 2009-09-30
日照新睿招商发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is: since the grating is directly glued to the film, the center point of the film deforms the most when it is deformed, which will cause the waveform signal to be deformed and broadened and cannot be detected
The resolution o

Method used

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  • Fiber grating osmotic pressure sensor with low measuring range
  • Fiber grating osmotic pressure sensor with low measuring range
  • Fiber grating osmotic pressure sensor with low measuring range

Examples

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Embodiment Construction

[0026] Such as figure 1 As shown, a fiber Bragg grating small-range osmotic pressure sensor includes a tubular support 5 and a water-tight casing 11, as well as a first fiber Bragg grating 7 and a second fiber Bragg grating 13 connected in series, and the edges are fixedly arranged The circular corrugated diaphragm 4 and the special-shaped diaphragm 18 at both ends of the tubular support 5, the centers of the circular corrugated diaphragm 4 and the special-shaped diaphragm 18 are fixedly arranged at the two ends of the connecting rod 10 respectively, and the connected The rod 10 is provided with a platform N, the joint of the circular corrugated diaphragm 4 and the special diaphragm 18 and the tubular support 5 is watertight, the joint of the tubular support 5 and the shell 11 is watertight, and the tubular support 5 is also provided with an adjustable frame 9 that supports the connection between the first Fiber Bragg Grating 7 and the second Fiber Bragg Grating 13 at one end...

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PUM

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Abstract

The invention relates to a fiber grating osmotic pressure sensor with low measuring range, comprising a tubular bracket, a housing, a first bragg fiber grating, a second bragg fiber grating, an undulatory mebrane and a specially shaped mebrane, wherein the tubular bracket is in water-tight seal with the housing, the first bragg fiber grating and the second bragg fiber grating are connected in series with each other, and the edges of the undulatory mebrane and the specially shaped mebrane are fixedly arranged on both ends of the tubular bracket; the centers of the undulatory mebrane and the specially shaped mebrane are respectively fixedly arranged on both ends of a connecting rod on which a platform is arranged, the circular undulatory mebrane and the specially shaped mebrane are in water-tight seal with the joint part of the tubular bracket, and the tubular bracket is in water-tight seal with the joint part of the housing; and an adjustable bracket is arranged on the tubular bracket, the joint part of the first bragg fiber grating and the second bragg fiber grating is supported by one end of the adjustable bracket, the adjustable bracket causes the first bragg fiber grating to be in the state of free suspension, and the second bragg fiber grating is fixedly arranged between the other end of the adjustable bracket and the platform in a pre-tight way and is connected with an externally connected optical cable. The invention is mainly used for the detection of low pressure.

Description

technical field [0001] The invention relates to a pressure sensor, in particular to a water pressure sensor which uses Bragg fiber grating to detect water seepage line and water level. Background technique [0002] The fiber grating sensor is sensitive to the parameters to be measured through the special packaging of the fiber grating, and measures the parameters to be measured through the change of the wavelength of the fiber grating, such as temperature and pressure, to achieve multi-point detection and real-time detection. At present, fiber grating sensors have been widely used in various scientific research fields such as various building structures, aerospace, ocean exploration, etc., and belong to a very advanced online detection technology. [0003] Existing fiber grating water level sensors in the measurement of the soaking line of the mine dam all have a large detection range, and are not very accurate and unresponsive to relatively shallow water levels. Therefore,...

Claims

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Application Information

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IPC IPC(8): G01L11/02G01F23/14
Inventor 周忠王昌刘统玉
Owner 日照新睿招商发展有限公司
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