CN117907209A - Metal structure local corrosion depth monitoring sensor - Google Patents
Metal structure local corrosion depth monitoring sensor Download PDFInfo
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- CN117907209A CN117907209A CN202311796020.XA CN202311796020A CN117907209A CN 117907209 A CN117907209 A CN 117907209A CN 202311796020 A CN202311796020 A CN 202311796020A CN 117907209 A CN117907209 A CN 117907209A
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- 230000007797 corrosion Effects 0.000 title claims abstract description 57
- 238000005260 corrosion Methods 0.000 title claims abstract description 57
- 239000002184 metal Substances 0.000 title claims abstract description 48
- 238000012544 monitoring process Methods 0.000 title claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 230000000704 physical effect Effects 0.000 claims abstract description 4
- 239000011888 foil Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 108010066114 cabin-2 Proteins 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The application belongs to the field of aircraft structure health monitoring, and particularly relates to a metal structure local corrosion depth monitoring sensor, which comprises the following components: a metal sheet, a housing, and a sensor; the shell forms a cabin, the metal sheet seals the cabin to form a closed cavity, the closed cavity is internally provided with detection gas with physical properties different from the atmosphere, the sensor is arranged in the closed cavity and is used for transmitting a change signal generated by communicating the closed cavity with the atmosphere after the metal sheet is corroded, and the change of air pressure, humidity and the like can be used for rapidly and intuitively reacting to the local corrosion depth, so that the error of measurement conversion is reduced, and the monitoring accuracy is improved. The sensor is convenient to install, low in manufacturing cost and capable of meeting the actual application requirements of engineering in monitoring precision.
Description
Technical Field
The application belongs to the field of aircraft structure health monitoring, and particularly relates to a metal structure local corrosion depth monitoring sensor.
Background
Corrosion can have an impact on the structural integrity of the aircraft. The metal surfaces are exposed to corrosive environments where localized corrosion may occur in some areas, where the corrosion rate of the aircraft structure is typically much greater than that of uniform corrosion, resulting in failure of the structure in a short period of time. The most damaging form is pitting, which is characterized by numerous small pits, crevice corrosion and cracks in the exposed metal surface. The pits gather corrosive media, so that the corrosion rate is high, the pits are easily and rapidly deepened in a short time, local and fatigue stress are combined to initiate cracks, the surface of the aircraft structure is damaged, and the structural integrity of the aircraft is threatened.
The conventional corrosion depth monitoring sensor generally comprises a linear polarization method, a galvanic corrosion method, a hanging piece method and the like, wherein the linear polarization method and the galvanic corrosion method are used for monitoring the uniform corrosion of a metal structure through corrosion current accumulated corrosion depth, and the hanging piece method is used for monitoring the corrosion degree and damage change of the metal structure, but needs to be further characterized by combining means such as a scanning electron microscope, energy spectrum analysis and the like. Therefore, it is necessary to design a new sensor capable of monitoring the corrosion depth of the local corrosion of the metal structure and convenient to use.
Disclosure of Invention
In order to solve the above problems, the present application provides a metal structure local corrosion depth monitoring sensor, comprising:
A metal sheet, a housing, and a sensor;
The shell forms a cabin, the metal sheet seals the cabin to form a closed cavity, the closed cavity is internally provided with detection gas with physical properties different from the atmosphere, the sensor is arranged in the closed cavity, and the sensor is used for transmitting a change signal generated by communicating the closed cavity with the atmosphere after the metal sheet is corroded.
Preferably, the closed cavity is provided with gas with the pressure lower than the atmospheric pressure or the pressure higher than the atmospheric pressure; the corresponding closed cavity sensor adopts a pressure sensor.
Preferably, the closed cavity is internally provided with dry gas, and a humidity sensor is adopted as a sensor of the corresponding closed cavity.
Preferably, the number of the cabins is multiple, and the metal sheets with different thicknesses are used for respectively forming a plurality of closed cavities with the cabins.
Preferably, at least two metal sheets of the same thickness form the same closed cavity respectively.
Preferably, the metal sheet is rectangular or circular.
Preferably, the foil is of the same material as the device under test
The advantages of the application include: this patent is to the local corruption of metallic structure, pit gathering corrosive medium, and the pit deepens rapidly in the short time is in the big corrosion rate state, and the structure receives fatigue stress to influence very easily to initiate the crackle, threatens the problem of aircraft structural integrity, has designed a sensor suitable for monitoring metallic structure local corruption. The corrosion depth sensor is different from the conventional metal structure uniform corrosion depth sensor for monitoring the corrosion current to accumulate and convert the corrosion depth, and the corrosion depth sensor can rapidly and intuitively reflect the local corrosion depth through the changes of air pressure, humidity and the like, so that the error of measurement conversion is reduced, and the monitoring accuracy is improved. The sensor is convenient to install, low in manufacturing cost and capable of meeting the actual application requirements of engineering in monitoring precision.
Drawings
FIG. 1 is a diagram of a split metal structure localized corrosion monitoring sensor in accordance with a preferred embodiment of the present application.
Detailed Description
In order to make the technical solution of the present application and its advantages more clear, the technical solution of the present application will be further and completely described in detail with reference to the accompanying drawings, it being understood that the specific embodiments described herein are only some of the embodiments of the present application, which are for explanation of the present application and not for limitation of the present application. It should be noted that, for convenience of description, only the part related to the present application is shown in the drawings, and other related parts may refer to the general design, and the embodiments of the present application and the technical features of the embodiments may be combined with each other to obtain new embodiments without conflict.
Furthermore, unless defined otherwise, technical or scientific terms used in the description of the application should be given the ordinary meaning as understood by one of ordinary skill in the art to which the application pertains. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," "outer," and the like as used in the description of the present application are merely used for indicating relative directions or positional relationships, and do not imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and that the relative positional relationships may be changed when the absolute position of the object to be described is changed, thus not being construed as limiting the application. The terms "first," "second," "third," and the like, as used in the description of the present application, are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance to the various components. The use of the terms "a," "an," or "the" and similar referents in the description of the application are not to be construed as limiting the amount absolutely, but rather as existence of at least one. As used in this description of the application, the terms "comprises," "comprising," or the like are intended to cover an element or article that appears before the term as such, but does not exclude other elements or articles from the list of elements or articles that appear after the term.
Furthermore, unless specifically stated and limited otherwise, the terms "mounted," "connected," and the like in the description of the present application are used in a broad sense, and for example, the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements, and the specific meaning of the two elements can be understood by a person skilled in the art according to specific situations.
The application provides a metal structure local corrosion depth monitoring sensor, which comprises:
a foil 1, a housing 3 and a sensor;
The shell 3 forms a cabin 2, the metal sheet 1 seals the cabin 2 to form a closed cavity, the closed cavity is internally provided with detection gas with physical properties different from the atmosphere, the sensor is arranged in the closed cavity and is used for transmitting a change signal generated by communicating the closed cavity with the atmosphere after the metal sheet 1 is corroded, and the power supply input and data output holes 4 are used for signal transmission.
Preferably, the closed cavity is provided with gas with the pressure lower than the atmospheric pressure or the pressure higher than the atmospheric pressure; the corresponding closed cavity sensor adopts a pressure sensor.
Preferably, the closed cavity is internally provided with dry gas, and a humidity sensor is adopted as a sensor of the corresponding closed cavity.
Preferably, the number of the cabins 2 is plural, and the metal sheets 1 with different thicknesses are respectively used for forming a plurality of closed cavities with the cabins 2.
Preferably, at least two metal sheets 1 of the same thickness form the same closed cavity respectively.
Preferably, the metal sheet 1 is rectangular or circular.
Preferably, the material of the foil 1 is the same as the material of the device under test.
The advantages of the application include: this patent is to the local corruption of metallic structure, pit gathering corrosive medium, and the pit deepens rapidly in the short time is in the big corrosion rate state, and the structure receives fatigue stress to influence very easily to initiate the crackle, threatens the problem of aircraft structural integrity, has designed a sensor suitable for monitoring metallic structure local corruption. The corrosion depth sensor is different from the conventional metal structure uniform corrosion depth sensor for monitoring the corrosion current to accumulate and convert the corrosion depth, and the corrosion depth sensor can rapidly and intuitively reflect the local corrosion depth through the changes of air pressure, humidity and the like, so that the error of measurement conversion is reduced, and the monitoring accuracy is improved. The sensor is convenient to install, low in manufacturing cost and capable of meeting the actual application requirements of engineering in monitoring precision.
The sensor for monitoring the local corrosion of the metal structure based on the air pressure sensor is shown in fig. 1, and the sensor is formed by sealing an air chamber, a metal sheet with a set thickness, the air pressure sensor and matched equipment thereof. When the depth of corrosion is greater than or equal to a certain sheet thickness, the air pressure inside the sensor will change. When the corrosion depth does not reach the thinnest slice thickness in the sensor, the pressure inside the sensor is kept unchanged; when the corrosion depth is larger than the thickness of the sensor sheet, the corrosion hole enables the inside of the sensor to form a passage with the outside atmosphere, so that gas flows under the drive of pressure difference, and small-range change of the gas pressure inside the originally sealed sensor is suddenly changed, so that the set corrosion depth at the moment is obtained. The sensor has the advantages of simple structure and convenient installation, realizes in-situ monitoring of local corrosion of the metal structure, can read monitoring results in real time, and can meet the required monitoring requirements.
Further, the metal Bao Pianxuan is made of the same material as the structure to be monitored, and is processed into a thin sheet with the same thickness with the set monitoring precision;
further, the sheet, the air bin and the air pressure sensor are sealed by utilizing sealing materials under negative pressure, the air pressure sensors are respectively arranged in the sheet air bins with different thicknesses, and the upper surfaces of the independent sheets are ensured to be in the same plane;
Further, the metal structure corrosion sensor of this patent design is through the degree of depth of atmospheric pressure change monitoring corrosion, and the reaction is sensitive, convenient to use.
The advantages of this embodiment include:
(1) The method is suitable for monitoring the local corrosion of the metal structure, can reflect the state of large corrosion rate that pit is rapidly deepened due to pit aggregation corrosive medium in a short time, and is extremely easy to crack due to the influence of fatigue stress, so that the surface of the aircraft structure is damaged, and the integrity of the aircraft structure is threatened;
(2) The corrosion depth of the metal structure is represented by adopting the air pressure change, the reaction is sensitive, and the result is reliable;
(3) The same-plane step type sensing unit is designed according to the set precision, so that the corrosion state of the real reaction metal structure can be ensured, and the corrosion depth of the reaction structure is intuitive without other detection and characterization means.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. A metal structure localized corrosion depth monitoring sensor, comprising:
a foil (1), a housing (3) and a sensor;
the shell (3) forms a cabin (2), the metal sheet (1) seals the cabin (2) to form a closed cavity, the closed cavity is internally provided with detection gas with physical properties different from the atmosphere, the sensor is arranged in the closed cavity, and the sensor is used for transmitting a change signal generated by communicating the closed cavity with the atmosphere after the metal sheet (1) is corroded.
2. The sensor of claim 1, wherein the closed chamber has a gas therein at a pressure below atmospheric pressure or at a pressure above atmospheric pressure; the corresponding closed cavity sensor adopts a pressure sensor.
3. The sensor for monitoring the local corrosion depth of a metal structure according to claim 1, wherein the closed cavity is provided with a dry gas, and a humidity sensor is adopted as the sensor of the corresponding closed cavity.
4. The sensor for monitoring the local corrosion depth of a metal structure according to claim 1, wherein a plurality of cabins (2) are provided, and a plurality of closed cavities are formed by the metal sheets (1) with different thicknesses and the cabins (2) respectively.
5. The sensor for monitoring the local corrosion depth of a metal structure according to claim 4, wherein at least two metal sheets (1) with the same thickness respectively form the same closed cavity.
6. The metal structure local corrosion depth monitoring sensor according to claim 1, wherein the metal foil (1) is rectangular or circular.
7. The metal structure localized corrosion depth monitoring sensor according to claim 1, wherein the metal foil (1) is of the same material as the device under test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311796020.XA CN117907209A (en) | 2023-12-25 | 2023-12-25 | Metal structure local corrosion depth monitoring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311796020.XA CN117907209A (en) | 2023-12-25 | 2023-12-25 | Metal structure local corrosion depth monitoring sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117907209A true CN117907209A (en) | 2024-04-19 |
Family
ID=90688953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311796020.XA Pending CN117907209A (en) | 2023-12-25 | 2023-12-25 | Metal structure local corrosion depth monitoring sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117907209A (en) |
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2023
- 2023-12-25 CN CN202311796020.XA patent/CN117907209A/en active Pending
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