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Graphene-based formation pressure sensor

A technology of formation pressure and sensors, applied in the field of sensors

Pending Publication Date: 2020-11-27
铁科院(深圳)研究设计院有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, although the pressure can be measured, there is no pressure sensor that can simultaneously measure the total pressure of water and soil in the formation and the pore water pressure

Method used

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  • Graphene-based formation pressure sensor
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Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiments of the present invention provide a graphene-based formation pressure sensor, such as figure 1 As shown, it includes: a housing 1, in which two force-measuring structures are arranged symmetrically along the center of the housing 1, one of which is arranged on the inner top surface of the housing 1, and the other is arranged on the inner surface of the housing 1 bottom surface.

[0029] Wherein, the force-measuring structure includes: one end of which is correspondingly connected to the inner top surface or the inner bottom surface of the housing 1, the deformation transmission rod 8, the elastic membrane 7 horizontally arranged between the inner walls of the housing 1, one side of the elastic membrane 7 and the deformation The end of the transmission rod 8 away from the inner top surface or the inner bottom surface is in contact, the elastic membrane 7 is provided with a graphene film 6 on the side away from the end of the deformation transmission rod 8, and...

Embodiment 2

[0032] On the basis of Example 1, such as figure 2 As mentioned above, the electrical signal transmission structure includes a fixed rod 2, one end of the fixed rod 2 is connected to the inner wall of the housing 1, the other end of the fixed rod 2 is connected to the elastic membrane 7, and one end of the fixed rod 2 facing away from the elastic membrane 7 passes through The side wall of the housing 1 extends out of the housing 1. In order to determine the relationship between the pressure on the pressure sensor and the sensing data under different stretching ratios and to adjust the measurement range and resolution of the device, the fixed rod 2 An adjustment structure is arranged on the extension section, and the adjustment structure is used to adjust the elongation rate of the elastic film 7 and the graphene film 6 .

[0033] Wherein, the adjustment structure includes a section of thread provided on the fixed rod 2 passing through the housing 1 and a nut 3 sleeved on the ...

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Abstract

The invention relates to a graphene-based formation pressure sensor. The sensor comprises a shell, and two force measuring structures are symmetrically arranged in the shell, wherein one is arranged on the inner top surface of the shell, and the other one is arranged on the inner bottom surface of the shell. Each force measuring structure comprises a deformation transmission rod connected to the inner top surface or the inner bottom surface of the shell and an elastic film horizontally arranged between the inner walls of the shell, the elastic film is in contact with the end part of the deformation transmission rod, a graphene film is arranged on the surface, deviating from the end part of the deformation transmission rod, of the elastic film, and an electrode is arranged on the surface, deviating from the elastic film, of the graphene film. Electric signal transmission structures are arranged at the two ends of the elastic films and connected with the electrodes through wires. The sensor further comprises a groove formed in the bottom of the shell, and a soil-retaining and water-permeable structure arranged in the groove and used for preventing stratum soil body fine particles from entering the groove to extrude the bottom of the shell. The device can adjust the measurement range and resolution of the sensor, can detect the total water and soil pressure and the pore water pressure at the same time, and is worth popularizing.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a graphene-based formation pressure sensor. Background technique [0002] Pressure sensor is a commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools, Pipeline and many other industries. In the field of geotechnical and underground engineering, formation pressure is a very important parameter for design, construction, and operation and maintenance. Among them, the total water and soil pressure and pore water pressure of the formation are the most concerned. If both are measured at the same time, the effective value of the formation soil skeleton can be obtained. Stress, and then judge key information such as...

Claims

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Application Information

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IPC IPC(8): G01L9/04G01L1/22
CPCG01L1/22G01L9/04
Inventor 庞小朝洪成雨顾问天王康任肖文海付连著徐玉胜江辉煌
Owner 铁科院(深圳)研究设计院有限公司
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