Optical fiber F-P pressure sensor and pressure liquid level sensing device thereof

A technology of a pressure sensor and a sensing device, applied in the direction of displaying a liquid level indicator through pressure measurement, fluid pressure measurement using an optical method, fluid pressure measurement of an elastic deformation gauge, etc., which can solve the problem of small linear elastic range of silicon wafers, Insufficient measurement accuracy, limited range and other problems, to achieve the effect of small size, mature technology and low cost

Inactive Publication Date: 2009-12-30
武汉精昱光传感系统研究院有限公司
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Problems solved by technology

[0003] The disadvantages of silicon wafers and Invar sheets are that the linear elastic range is small, the structure is complex, and the measurement range is limited; while the bellows can so...

Method used

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  • Optical fiber F-P pressure sensor and pressure liquid level sensing device thereof
  • Optical fiber F-P pressure sensor and pressure liquid level sensing device thereof
  • Optical fiber F-P pressure sensor and pressure liquid level sensing device thereof

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Embodiment Construction

[0048] Below in conjunction with accompanying drawing and embodiment describe in detail:

[0049] 1. Optical fiber F-P pressure sensor (referred to as sensor) 10

[0050] 1. Overall

[0051] Such as figure 1 , the sensor 10 includes a pressure injection hole 11, a pressure capsule / sheet 12, a support 13, an optical fiber fixing hole 14, a conductive optical fiber 15 and an air pressure balance hole 16;

[0052] The pressure membrane box / sheet 12 with the pressure injection hole 11 in the center is sealed and connected with the periphery of the opening of the support 13; the center of the bottom surface of the support 13 is provided with an optical fiber fixing hole 14 and an air pressure balance hole 16, and the optical fiber fixing hole 14 is connected with a conductive Fiber 15;

[0053] An extrinsic F-P cavity is formed between the end face of the conducting fiber 15 and the center plane of the pressure bellows / sheet 12.

[0054] 2. Function block

[0055] 1. Pressure ...

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Abstract

The invention discloses an optical fiber F-P pressure sensor and a pressure liquid level sensing device thereof, relating to a type of pressure sensor. The structure of the sensor is that: a pressure film box/plate provided with pressure injection holes is arranged at the center and connected with the periphery of the opening of a supporting member in a sealing way; the center of the bottom of the supporting member is provided with optical fixing holes and pressure balancing holes, and the optical fixing holes are connected with conductive optical fiber; and an extrinsic F-P cavity is arranged between the end face of the conductive optical fiber and the central plane of the pressure film box/plate. The sensor features simple structure, small volume, convenient mounting, high pressure resolution and is very suitable for measuring requirement of small range and high precision; sensitive elements can be replaced conveniently to adapt to the different measuring requirements; the cost is lower and no special demands for light source wavelength exists; the invention is applicable to computation of storage quantity of small chemical liquid and oil stock tank, chemical/oil stock and transportation tank vehicle and other various types of liquid/gas stock and transportation equipment.

Description

technical field [0001] The invention relates to a pressure sensor, in particular to an optical fiber F-P pressure sensor and a pressure liquid level sensing device thereof. Background technique [0002] There are many designs for the F-P cavity. The design of the F-P cavity pressure liquid level sensor used in liquid level measurement mainly focuses on the design of the elastic element sensitive to displacement and its corresponding pressure. Existing schemes include: early silicon wafers, Invar sheets and Bourdon tubes, and recently large linear range bellows. [0003] The disadvantages of silicon wafers and Invar sheets are small linear elastic range, complex structure, and limited measuring range; while bellows can solve the problem of a large range, but the measurement accuracy is insufficient. [0004] However, the design of pressure bellows / sheets commonly used in pressure instruments has not been reported yet. Contents of the invention [0005] The purpose of the ...

Claims

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Application Information

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IPC IPC(8): G01L7/10G01L7/08G01L11/02G01F23/14G01F23/18
Inventor 黎敏童斌李玉林
Owner 武汉精昱光传感系统研究院有限公司
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