Fish-shaped fiber grating wide-range pressure sensor

A pressure sensor, fiber grating technology, applied in the measurement of fluid pressure, fluid pressure measurement using optical methods, instruments, etc., can solve the problems of low detection pressure and small range

Pending Publication Date: 2021-08-31
潍坊嘉腾液压技术有限公司
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Problems solved by technology

Therefore, this structure is suitable for large-range hydraulic pressure detection, so as ...

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  • Fish-shaped fiber grating wide-range pressure sensor
  • Fish-shaped fiber grating wide-range pressure sensor
  • Fish-shaped fiber grating wide-range pressure sensor

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Embodiment Construction

[0039] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings.

[0040] In the following description, many specific details are set forth in order to fully understand the application, but the application can also be implemented in other ways different from those described here, therefore, the protection scope of the application is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0041] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" ", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings , is only f...

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Abstract

The invention relates to a fish-shaped fiber grating wide-range pressure sensor which is suitable for detecting the liquid pressure in a pipeline and comprises a skeleton. The skeleton is composed of two metal sheets which are symmetrically arranged, each metal sheet is of a sheet structure which is long in the longitudinal direction and short in the transverse direction, and the middle portions of the two metal sheets protrude outwards respectively. A cavity is formed between the two metal sheets, an air bag similar to a fish bubble is arranged in the cavity, and fillers are arranged between the air bag and the metal sheets. According to the bionic principle of a fish body, the fishbone-shaped metal sheets are designed, the fiber gratings are arranged at the inner side and the outer side of the central axis of a thenar line of each metal sheet, and the two fiber gratings at the two sides of one metal sheet eliminate the influence of temperature on the gratings according to the positive and negative deformation principle of the metal sheets, and the temperature self-compensation pressure detection is achieved; the metal sheet at the other side is provided with a concave or convex rib groove which plays a role in strengthening the supporting effect of the metal sheet on the radial elliptical deformation of the fiber grating, and the middle and high pressure is detected by using birefringence resonant wavelength splitting relay.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing and hydraulic pressure detection, in particular to a fish-shaped optical fiber grating large-range pressure sensor. Background technique [0002] It can be known from the Bernoulli equation that the liquid pressure in the pipeline is also a form of energy. In the hydraulic transmission system, the flow rate (kinetic energy) of the medium is low, and the potential energy generated is relatively low, which can be ignored and only rely on the working medium. Pressure can transmit power, which is the so-called hydrostatic transmission. In hydrostatic transmission, due to the opening and closing of the pump or valve, or the dynamic change of the load, the fluid pressure in the pipeline will change, especially the research on the pressure distribution and dynamic characteristics in the spiral pipeline is still a technical blank. . [0003] Traditional liquid pressure sensing devices are ...

Claims

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Application Information

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IPC IPC(8): G01L11/02G01L19/04
CPCG01L11/025G01L19/04
Inventor 王洪涛黄爱武王一烁
Owner 潍坊嘉腾液压技术有限公司
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