WO2017033242A1 - Structure, procédé et système de détection de dégradation - Google Patents

Structure, procédé et système de détection de dégradation Download PDF

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Publication number
WO2017033242A1
WO2017033242A1 PCT/JP2015/073614 JP2015073614W WO2017033242A1 WO 2017033242 A1 WO2017033242 A1 WO 2017033242A1 JP 2015073614 W JP2015073614 W JP 2015073614W WO 2017033242 A1 WO2017033242 A1 WO 2017033242A1
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Prior art keywords
deterioration
deterioration detection
detection
metal ion
detection structure
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PCT/JP2015/073614
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English (en)
Japanese (ja)
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昌幸 岡村
進 石田
明理 楢原
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株式会社日立製作所
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Priority to PCT/JP2015/073614 priority Critical patent/WO2017033242A1/fr
Publication of WO2017033242A1 publication Critical patent/WO2017033242A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light

Definitions

  • the present invention relates to a degradation detection structure, a degradation detection method, and a degradation detection system.
  • the degree of progress of the corrosion state of a structure can be grasped by detecting metal ions generated from the vicinity of the corrosion region. For this reason, a corrosion detection sensor using a corrosion current that flows when different kinds of metals come into contact with each other through moisture is generally used to detect the corrosion of the structure.
  • Patent Document 1 discloses that corrosion of a reinforcing bar in a reinforced concrete structure is detected by detecting a penetration state of a corrosion factor into concrete by a sensor detection unit covered with a sensor coating unit.
  • a corrosion sensor for detecting the environment is disclosed.
  • Patent Document 2 visualizes the process of stress corrosion cracking and / or pitting corrosion of a metal material by using a metal cation reactive color former that develops a color reaction with a cation as a main component of the metal material. A method is disclosed.
  • gelling is performed by adding a thickener such as gelatin to an aqueous solution of a metal cation-reactive color former, thereby suppressing the diffusion of the color substance and enhancing the detection sensitivity.
  • the corrosion detection is performed in a state where the aqueous solution of the metal cation reactive color former is gelled, and considering that the gel state needs to be maintained, tunnels, bridges, etc. It is not suitable for detecting corrosion of structures.
  • the whitened thickener is exposed on the specimen surface when moisture evaporates. For this reason, there exists a possibility that the color development location by a metal cation reactive color former cannot be detected.
  • An object of the present invention is to provide a deterioration detection structure, a deterioration detection method, and a deterioration detection system that can easily and stably detect a deterioration state of a structure.
  • a deterioration detection structure for detecting deterioration of a structure, wherein the first surface is in contact with a detection area, and is separated from the first surface.
  • a second surface a deterioration detection material for detecting deterioration, which is filled in a region between the first surface and the second surface, and between the first surface and the second surface; And a plurality of holes formed in the substrate.
  • a deterioration detection method in a region formed by a first surface that is in contact with a detection region of a structure to be inspected and a second surface that is separated from the first surface.
  • a deterioration detection structure containing a deterioration detection material for detecting deterioration and having a plurality of holes is disposed in contact with the detection area, and the state of the second surface of the deterioration detection structure is determined based on the state of the second surface.
  • the deterioration state of the detection area is detected.
  • a deterioration detection system for detecting deterioration of a structure, wherein a first surface contacting a detection area and a first surface separated from the first surface are separated.
  • the area formed by the surface of 2 includes a deterioration detection structure that includes a deterioration detection material that detects deterioration and has a plurality of holes, and a detection device that detects a deterioration state of the detection area. It is characterized by that.
  • the present invention it is possible to realize a deterioration detection structure, a deterioration detection method, and a deterioration detection system that can easily and stably detect a deterioration state of a structure.
  • FIG. 3 is a cross-sectional view showing a state in which a metal ion coloring portion 5 is formed on a porous body 3 of a deterioration detection structure according to Embodiment 1.
  • FIG. 5 is a diagram illustrating a verification example of Example 1.
  • FIG. It is a figure which shows the cross section of the deterioration detection structure of Example 2.
  • FIG. 2 It is sectional drawing which shows the state of the deterioration detection structure of Example 2 when the corrosion 4 and the crack 8 generate
  • FIG. It is sectional drawing which shows the state in which the stress light emission part 9 and the metal ion coloring part 5 were formed in the deterioration detection structure of Example 2.
  • FIG. It is sectional drawing which shows the state of the deterioration detection structure of Example 2 when the corrosion 4 and the pH change area
  • FIG. It is sectional drawing which shows the state in which the pH color development part 11 and the metal ion color development part 5 were formed in the deterioration detection structure of Example 2.
  • FIG. It is a figure which shows the cross section of the deterioration detection structure of Example 3.
  • FIG. It is sectional drawing which shows the state of the deterioration detection structure of Example 3 when the corrosion 4 and the crack 8 generate
  • FIG. It is sectional drawing which shows the state by which the metal ion coloring part 5 and the stress light emission part 9 were formed in the porous body 3 of the deterioration detection structure of Example 3.
  • FIG. It is sectional drawing which shows the state of the deterioration detection structure of Example 3 when the corrosion 4 and the pH change area
  • FIG. 6 is a cross-sectional view showing a state in which a metal ion coloring portion 5 and a pH coloring portion 11 are formed on the porous body 3 of the deterioration detection structure of Example 3.
  • It is a flowchart figure which shows an example of the manufacturing method of the deterioration detection structure of Example 1.
  • FIG. It is a flowchart figure which shows an example of the manufacturing method of the deterioration detection structure of Example 1.
  • FIG. It is a flowchart figure which shows an example of the manufacturing method of the deterioration detection structure of Example 1.
  • FIG. It is a figure which shows an example of the deterioration detection method using the deterioration detection structure of Example 1.
  • FIG. It is a figure which shows an example of the deterioration detection method using the deterioration detection structure of Example 1.
  • FIG. It is a figure which shows an example of the deterioration detection method using the deterioration detection structure of Example 1.
  • FIG. It is a figure which shows an example of the deterioration detection method using a deterioration detection structure.
  • It is a block diagram which shows the structure of a deterioration detection system.
  • It is a flowchart figure which shows an example of the deterioration detection method.
  • FIG. 1 is a diagram illustrating a cross section of a deterioration detection structure 50 according to the first embodiment.
  • the deterioration detection structure 50 is a porous body 3 that is arranged in contact with the surface of the detection region 1 of the structure to be inspected and has a plurality of pores 2.
  • Examples of structures to be inspected include structures such as buildings and factories, tunnels, bridges, dams, embankments, harbors, landfills, runways, roads, and the like.
  • members such as factory piping, water pipes, railroad rails, power transmission lines, transformers, and cables can be used as structures to be inspected.
  • a large number of pores 2 are formed between a first surface 3a that is in contact with the detection region 1 and a second surface 3b that is separated from the first surface 3a.
  • the region between the first surface 3a and the second surface 3b of the porous body 3 contains a deterioration detection material for detecting deterioration.
  • a metal ion color former such as a chelating agent (molecular recognition material) that detects corrosion by forming a complex with a metal ion and detects corrosion is described as an example of the deterioration detection material.
  • FIG. 2A is a cross-sectional view showing a state of the deterioration detection structure 50 of Example 1 when a corrosion spot 4 which is a kind of deterioration occurs on the surface of the detection region 1.
  • the structure to be inspected includes a metal material
  • the structure to be inspected is left exposed to the atmosphere for a long period of time, the surface of the structure to be inspected is subjected to the corrosion site shown in FIG. 4 occurs.
  • metal atoms on the surface of the structure to be inspected lose electrons and are ionized and separated.
  • the metal ions generated in this manner react with oxygen in the atmosphere and water present in the vicinity to form compounds such as oxides, hydroxides and carbonates.
  • these compounds are deposited on the surface of the metal structure, they are shaped as corrosion that can be visually confirmed, such as patina.
  • metal ions are generated from the metal atoms in the corroded portion 4.
  • the metal ions pass through the holes 2 and move in the porous body 3 from the first surface 3a to the second surface 3b side.
  • the metal ions are captured by the metal ion color former contained in the porous body 3 to form a complex.
  • the metal ion color former is colored by complex formation with metal ions, and the metal ion color development portion 5 is formed on the porous body 3.
  • a chelating agent that captures metal ions to form a complex can be used as the metal ion color former.
  • Chelating agents generally change color upon complex formation with specific metal ions. For this reason, by appropriately selecting a chelating agent that can form a complex with metal ions generated from the metal material contained in the object to be detected, the occurrence of metal ions is detected and the location of the corrosion location is specified by the change in the coloring state. can do.
  • 1,10-phenanthroline can be used as a metal ion color former.
  • 1,10-phenanthroline is transparent (white powder) in a single state where no complex is formed, but turns red by complex formation with iron ions.
  • the metal ion color former one that develops color with metal ions other than iron ions can be used.
  • luminol, ammonia, EDTA (ethylenediaminetetraacetic acid), cyanide, amine compound, halogen compound and the like can be used.
  • the metal ions that are the detection target of the metal ion color former are not limited to iron ions, and for example, metal ions generated from metal elements such as copper, zinc, aluminum, nickel, and chromium can be detected.
  • FIG. 2B is a cross-sectional view showing a state in which the metal ion coloring portion 5 is formed on the porous body 3 of the deterioration detection structure 50.
  • the metal ions generated at the corrosion site 4 pass through the pores 2 and pass through the first surface 3 a of the porous body 3 to the second surface 3 b. 3 to move to near the surface.
  • region corresponding to the corrosion location 4 develops the color to the surface side of the porous body 3, the metal ion coloring part 5 is detected from the outside, and the corrosion location 4 is specified.
  • the metal ion coloring unit 5 can identify the occurrence location by detecting a change in color tone or color development amount of the captured image or by detecting a wavelength change on the surface of the degradation detection structure. it can.
  • the color development state can be quantified by counting the color development amount of a captured image taken by an imaging device such as a camera, an image sensor, or a spectrum sensor for each pixel.
  • an imaging device such as a camera, an image sensor, or a spectrum sensor for each pixel.
  • the metal ion generation rate is estimated to be faster than the normal expected rate, it is assumed that the corrosion progress is also fast. In this case, it is possible to take measures such as carrying out maintenance work such as repairs early. A specific processing procedure for deterioration detection will be described later.
  • an organic material or an inorganic material may be used as long as it is a porous material.
  • synthetic resin or natural resin such as cellulose or wood can be used for polyethylene, polypropylene, melamine resin, polyurethane and the like.
  • an inorganic material a porous ceramic material such as zeolite can be used, and a metal porous plate obtained by making a metal plate such as aluminum porous can also be used.
  • the porous body 3 in which a large number of minute holes 2 are formed is provided on the surface of the detection region 1 of the structure to be inspected is described as an example.
  • the structure provided on the surface of the detection region 1 is not necessarily the porous body 3.
  • a structure in which a plurality of small-diameter communication holes for connecting the first surface 3 a and the second surface 3 b of the porous body 3 are formed is installed on the surface of the detection region 1. Good. This also applies to the second and third embodiments.
  • FIG. 3 shows a verification example of the first embodiment. All of the verification experiments were performed under room temperature and high humidity conditions of 25 ° C. and 99% RH, and the standing time was 168 hours. A steel material containing iron was used as the structure to be inspected.
  • Verification example 2 In verification example 2, the structure of the structure to be inspected provided with the porous body 3 that does not contain the metal ion coloring material is changed in appearance before and after being left at room temperature and high humidity. These are shown by respective captured images.
  • the structure provided with the porous body 3 that does not include the metal ion color former no change in the color development state on the surface of the porous body 3 was observed before and after being left standing.
  • Verification Example 3 The change in appearance before and after leaving the structure in which the porous body 3 containing the metal ion coloring material is provided on the surface of the structure to be inspected in Verification Example 3 is allowed to stand under room temperature and high humidity conditions. These are shown by respective captured images. 1,10-phenanthroline was used as the metal ion color former, and melamine resin was used as the porous body 3. Specifically, a melamine resin in which a 1,10-phenanthroline solution was immersed for 5 minutes was attached to the surface of the structure to be inspected.
  • the occurrence of a red metal ion color development portion 5 was confirmed on the surface of the porous body 3 after being left standing. That is, it was confirmed that iron ions generated by the corrosion of the structure to be inspected were captured by 1,10-phenanthroline and a red complex was formed.
  • Verification Example 4 the structure of the structure to be inspected provided with the porous body 3 containing the metal ion coloring material was changed in appearance before and after leaving when left under room temperature and high humidity conditions. These are shown by respective captured images. 1,10-phenanthroline was used as the metal ion color former, and cellulose resin was used as the porous body 3.
  • the occurrence of a red metal ion color development portion 5 was confirmed on the surface of the porous body 3 after being left standing. That is, it was confirmed that iron ions generated by the corrosion of the structure to be inspected were captured by 1,10-phenanthroline and a red complex was formed.
  • Example 2 will be described with reference to FIGS.
  • Example 1 the example in which the porous body 3 is formed of a single layer was shown, but in Example 2, the example in which the porous body 3 is formed of a plurality of porous layers is shown.
  • FIG. 4 is a diagram illustrating a cross section of the deterioration detection structure 51 of the second embodiment.
  • the deterioration detection structure 51 according to the second embodiment is a porous body 3 that is disposed in contact with the surface of the detection region 1 of the structure to be inspected and has a plurality of pores 2.
  • the porous body 3 has a first porous layer 6 having a contact surface with the detection region 1 and a second porous layer provided in contact with the first porous layer 6. 7 two layers.
  • the first porous layer 6 includes a large number of gaps between a first surface 6a that is in contact with the detection region 1 and a third surface 6b that is separated from the first surface 6a. Air holes 2A are formed.
  • the second porous layer 7 also has a large number of pores between the fourth surface 7a that is in contact with the first porous layer 6 and the second surface 7b that is separated from the fourth surface 7a. 2B is formed.
  • the porous body 3 is provided with the first porous layer 6 and the second porous layer 7 in contact with each other, and the porous body 3 is formed by the pores 2A and 2B of each layer.
  • a large number of holes 2A and holes 2B are formed between the first surface 6a in contact with the detected region 1 and the second surface 7b spaced from the first surface 6a.
  • the first porous layer 6 and the second porous layer 7 each contain a deterioration detection material.
  • the second porous layer 7 contains a deterioration detection material that detects a deterioration state of a type different from the deterioration state detected by the deterioration detection material included in the first porous layer 6.
  • FIG. 5A is a cross-sectional view showing a state of the deterioration detection structure 51 of Example 2 when corrosion 4 and cracks 8 are generated on the surface of the detection region 1.
  • Strain energy is generated from the crack 8. This strain energy moves in the first porous layer 6 along the holes 2A from the first surface 6a toward the third surface 6b.
  • the stress-stimulated luminescent material emits light upon receiving strain energy that travels through the holes 2A, and a stress-stimulated light-emitting portion 9 is formed in the first porous layer 6 (see FIG. 5B).
  • a stress luminescent material that emits light by strain energy applied from the outside can be used. That is, by causing the first porous layer 6 to contain a stress luminescent material, when a crack 8 is generated on the surface of the detection region 1, the stress luminescent material emits light by receiving strain energy generated from the crack. To do.
  • the stress luminescent material include (i) a stress luminescent material having a spinel structure, a corundum structure, or a ⁇ -alumina structure, (ii) a luminescent stress luminescent material of silicate, and (iii) a defect control type aluminate. (Iv) A high-brightness mechano having a structure in which a wurtzite structure and a zincblende structure coexist, and comprising oxide, sulfide, selenide or telluride as a main component A luminescent material can be used.
  • Metal ions are generated from the metal atoms in the corroded portion 4. This metal ion is It moves from the first surface 6a to the third surface 6b side through the air holes 2A in the first porous layer 6. The metal ions further move from the fourth surface 7a of the second porous layer 7 to the second surface 7b through the holes 2B.
  • the metal ions are captured by the metal ion color former contained in the second porous layer 7 during the movement process in the second porous layer 7.
  • the metal ion color former develops color by capturing metal ions, and the metal ion color development portion 5 is formed in the second porous layer 7 (see FIG. 5B).
  • FIG. 5B shows a state in which the stress light emitting portion 9 is formed in the first porous layer 6 and the metal ion coloring portion 5 is formed in the second porous layer 7.
  • the stress light emitting portion 9 is formed in a region from the first surface 6 a to the third surface 6 b in contact with the detection region 1 of the first porous layer 6.
  • the coloring portion 5 is formed in the region from the fourth surface 7a to the second surface 7b of the second porous layer 7.
  • the corrosion location 4 can be specified by detecting the metal ion coloring part 5 formed in the 2nd porous layer 7 from the outside.
  • FIG. 6A is a cross-sectional view showing a state of the deterioration detection structure 51 of Example 2 when corrosion 4 and a pH change region 10 occur on the surface of the detection region 1.
  • FIG. 6A shows an example in which the first porous layer 6 contains a pH indicator as a deterioration detection material, and the second porous layer 7 contains a metal ion color former as a deterioration detection material.
  • the pH change region 10 is generated, for example, when a structure such as concrete is neutralized by being exposed to rainwater or the like from the initial alkalinity. Such a pH change region causes deterioration of the structure. For this reason, the pH value of the structure is an index related to the deterioration of the structure.
  • a component (hereinafter, referred to as a pH change component) whose constituent material of the structure to be inspected has changed in pH passes through the pores 2 ⁇ / b> A and passes through the first porous layer 6 in the first surface. It moves from 6a to the third surface 6b side.
  • the pH indicator contained in the first porous layer 6 changes color by contacting with a pH changing component that moves through the pores 2 ⁇ / b> A, and a pH coloring portion 11 is formed in the first porous layer 6. (See FIG. 6B.)
  • pH indicator examples include methyl orange, methyl violet, bromophenol blue, bromothymol blue, cresol red, litmus, methyl yellow, congo red, nitrophenol, phenol red, and neutral red.
  • the metal ions generated from the corroded portion 4 move to the vicinity of the surface of the second porous layer 7 by the same mechanism as described in FIG. 5A, and the metal ion coloring portion 5 is formed on the second porous layer 7. Formed (see FIG. 6B).
  • FIG. 6B shows a state in which the pH coloring portion 11 is formed in the first porous layer 6 and the metal ion coloring portion 5 is formed in the second porous layer 7.
  • the pH coloring portion 11 is formed in a region from the first surface 6a to the third surface 6b of the first porous layer 6, and the metal ion coloring portion 5 is The porous layer 7 is formed in a region from the fourth surface 7a to the second surface 7b.
  • the corrosion location 4 can be specified by detecting the metal ion coloring part 5 formed in the 2nd porous layer 7 from the outside.
  • Example 2 by making the porous body 3 into a two-layer structure, it is possible to detect a deterioration mode different from corrosion such as a crack 8 and a pH change region 10 together with the corrosion location 4. It becomes possible.
  • the first porous layer 6 includes a stress-stimulated luminescent material that detects the crack 8 has been described.
  • the first porous layer 6 is the second porous layer. 7 may contain a metal ion color former that detects a metal ion different from the metal ions detected by the metal ion color former included in the.
  • the 1st porous layer 6 demonstrated the example containing the pH indicator which detects the pH change area
  • the 1st porous layer 6 also in this example, You may make it contain the metal ion color body which detects the metal ion different from the metal ion detected by the metal ion color body contained in the 2nd porous layer 7.
  • metal ions that are not captured by the second porous layer 7 can be detected by the first porous layer 6, and a plurality of types of corrosion spots 4 caused by different metal ions can be detected. .
  • Example 2 since a color developing portion or a light emitting portion corresponding to a plurality of types of deterioration states is formed in one deterioration detection structure, these color developing portions or light emitting portions are colored in mutually different colors, or It is preferable to select and use a deterioration detection material as appropriate so that the emission wavelengths are different.
  • 1,10-phenanthroline complexed with iron ions is used as the second porous layer.
  • the red metal ion coloring portion 5 is formed in the second porous layer 7.
  • the first porous layer 6 is mixed with a stress luminescent material that emits light at a wavelength different from that of red, thereby emitting light with a color tone different from that of the metal ion coloring portion 5 of the second porous layer 7.
  • a stress light emitting portion 9 is formed in the first porous layer 6.
  • the second porous layer 7 having a dark overall color tone When the second porous layer 7 having a dark overall color tone is used, there is a possibility that changes in the color tone of the coloring portion and the light emitting portion generated in the first porous layer 6 cannot be visually identified. . For this reason, it is preferable to form the porous layer formed on the 1st porous layer 6 with thin color tones, such as white. Even when the second porous layer 7 has a deep color tone, it is possible to identify the type of deterioration detected by detecting the change in the wavelength of each color developing portion or light emitting portion. It is.
  • the configuration in which the metal ion color former is contained in the second porous layer 7 is shown.
  • the metal ion color former is contained in the first porous layer 6.
  • a stress luminescent material or a pH indicator may be contained in the second porous layer 7.
  • the metal ion color former may not necessarily be included,
  • the first porous layer 6 may contain a stress luminescent material
  • the second porous layer 7 may contain a pH indicator.
  • Example 2 shows an example in which the porous body 3 includes two porous layers. However, the porous body 3 may be provided with three or more porous layers.
  • Example 3 will be described with reference to FIGS.
  • Embodiment 2 the form in which deterioration detection materials having different types of deterioration states to be detected are blended in different layers has been shown.
  • Example 3 deterioration detection materials having different types of deterioration states to be detected are identical to each other.
  • FIG. 7 is a diagram illustrating a cross section of the deterioration detection structure 52 according to the third embodiment.
  • the deterioration detection structure 52 of the third embodiment is a porous body 3 composed of a single layer having a plurality of pores 2 disposed in contact with the surface of the detection region 1 of the structure to be inspected. Similar to the first embodiment, the porous body 3 according to the third embodiment includes a large number of gaps between the first surface 3a that is in contact with the detection region 1 and the second surface 3b that is separated from the first surface 3a. Holes 2 are formed.
  • a plurality of types of degradation detection materials having different types of degradation states to be detected are included in a single layer of the porous body 3.
  • FIG. 8A is a cross-sectional view showing a state of the deterioration detection structure 52 of Example 3 when corrosion 4 and cracks 8 occur on the surface of the detection region 1.
  • FIG. 8 shows an example in which the porous body 3 contains a stress-stimulated luminescent material and a metal ion coloring material as a deterioration detection material.
  • the metal ions generated from the corroded portion 4 move to the vicinity of the surface of the porous body 3 by the same mechanism as described in Example 1, and form the metal ion coloring portion 5 in the porous body 3 (FIG. 8B).
  • the strain energy generated from the crack 8 moves in the porous body 3 by the same mechanism as described in the second embodiment, thereby forming the stress light emitting portion 9 in the porous body 3 (see FIG. 8B). ).
  • FIG. 8B shows a state in which the metal ion coloring portion 5 and the stress light emitting portion 9 are formed on the porous body 3.
  • the metal ion coloring portion 5 and the stress light emitting portion 9 are each formed in a region between the first surface 3 a and the second surface 3 b of the porous body 3.
  • FIG. 9A is a cross-sectional view showing the state of the deterioration detection structure 52 of Example 3 when the corrosion 4 and the pH change region 10 occur on the surface of the detection region 1.
  • FIG. 9 shows an example in which the porous body 3 contains a pH indicator and a metal ion coloring body as a deterioration detection material.
  • the metal ions generated from the corroded portion 4 move to the vicinity of the surface of the porous body 3 by the same mechanism as described in Example 1, and form the metal ion coloring portion 5 in the porous body 3 (FIG. 9B). reference.). Further, the pH change component generated from the pH change region 10 moves in the porous body 3 by the same mechanism as described in Example 2, and forms the pH coloring portion 11 in the porous body 3 (FIG. 9B). reference.).
  • FIG. 9B shows a state where the metal ion coloring portion 5 and the pH coloring portion 11 are formed on the porous body 3.
  • the metal ion coloring portion 5 and the pH coloring portion 11 are each formed in a region from the first surface 3 a to the second surface 3 b of the porous body 3.
  • the stress luminescent material and the pH indicator can be the same as those described in Example 2.
  • Example 3 by mixing deterioration detection materials with different types of deterioration states to be detected in the same layer, along with the corrosion portion 4, for example, corrosion such as cracks 8 and pH change regions 10 and the like. It is possible to detect another deterioration mode. Further, since the light emitting portion and the color developing portion for detecting these deterioration states are formed in a single layer, it is easy to visually confirm from the outside.
  • Example 3 since a plurality of types of deterioration detection materials that detect different types of deterioration states are included in a single layer, whether the color-development portions detected by these deterioration detection materials are colored in different colors or not. Alternatively, it is preferable to select and use a deterioration detection material as appropriate so that the emission wavelength is different.
  • Example 3 for example, when the corrosion 4 and the crack 8 are generated in the same portion of the detected region 1, or when the corrosion 4 and the pH change region 10 are generated in the same portion of the detected region 1, both The color development part and the color development part due to the above occur in the same region of the porous body 3. Even in this case, if the color tone or light emission wavelength of each color developing portion or each light emitting portion is different, each color development can be identified by visual observation or data processing of the imaging body.
  • FIG. 8 and FIG. 9 an example in which a stress luminescent material or a pH indicator is contained in the porous body 3 together with the metal ion color former is shown, but instead of the stress luminescent material and the pH indicator, Two or more metal ion color formers that detect different metal ions may be included. In this case, it is possible to identify a plurality of types of corrosion spots 4 caused by different metal ions by the coloring portion.
  • the porous body 3 contains two types of deterioration detection materials that detect different deterioration states. Can be distinguished from each other, three or more kinds of deterioration detection materials may be contained. For example, two or more kinds of metal ion color formers can be contained in the porous body 3 together with the stress luminescent material and the pH indicator.
  • the degradation detection material is dissolved in a solvent to prepare a degradation detection material solution (S101).
  • a deterioration detection material for example, in the case of a metal ion light emitter, a molecular recognition material such as a chelating agent is used.
  • the solvent a solvent capable of dissolving the deterioration detecting material is appropriately selected and used.
  • a porous body is prepared. At this time, a predetermined thickness is uniformly cut out and processed from the porous material as a raw material (S102). Next, the porous body prepared in S102 is immersed in the solution of the deterioration detection material prepared in S101 (S103). The immersion time is not particularly limited, and may be immersed until the solution of the deterioration detection material penetrates the entire porous body.
  • the porous body infiltrated with the solution of the deterioration detection material is dried (S104).
  • the dried porous body infiltrated with the deterioration detection material is attached to the structure to be inspected and installed (S105).
  • a porous material for the joining member provided between them. It is not always necessary to use a joining member.
  • the end face of the porous body is shaped to be able to be joined to the structure to be inspected, and the region excluding the end face of the porous body is in direct contact with the structure to be inspected. May be.
  • FIG. 11 shows a method for forming a porous body by foaming a resin material.
  • the deterioration detection material and the resin material are mixed (S201).
  • the resin material the resin material used as the raw material of the porous body exemplified in Example 1 is used.
  • a foaming agent is mixed into the mixture of the deterioration detection material and the resin material (S202).
  • Typical examples of the foaming agent include sodium carbonate and sodium hydrogen carbonate.
  • a porous material is formed by foaming a resin material in which the deterioration detection material and the foaming agent are mixed (S203).
  • the foaming of the resin material may be performed by heat treatment or by introducing a gas such as nitrogen gas, carbon dioxide gas, butane gas, propane gas or the like.
  • a gas such as nitrogen gas, carbon dioxide gas, butane gas, propane gas or the like.
  • the resin material does not need to contain a foaming agent, and S203 can be directly performed from S201 without performing the process of S202.
  • the obtained porous body is processed into a sheet (S204).
  • the porous body processed into a sheet shape is attached to the structure to be inspected and installed (S205).
  • FIG. 12 shows a method of forming a porous body by applying a resin material on a structure to be inspected and then foaming.
  • the deterioration detection material is mixed with a resin material that is a raw material of the porous body (S301).
  • a foaming agent is mixed into the mixture of the deterioration detection material and the resin material (S302).
  • a resin material containing a deterioration detection material and a foaming agent is applied to the surface of the structure to be inspected (S303).
  • the painted resin material is foamed on the surface of the structure to be inspected (S304). Foaming can be performed by heat treatment, for example.
  • the foam of the resin material is cured (S305) to form a porous body.
  • the manufacturing method of the deterioration detection structure 50 according to the first embodiment has been described with reference to FIGS. 10 to 12. However, these methods are naturally applicable to a new structure to be inspected. These methods can also be applied to existing structures to be inspected.
  • FIG. 13A is a diagram illustrating an example of a deterioration detection method using the deterioration detection structure 50 according to the first embodiment.
  • a corrosion spot 4 is generated on the surface of the detection area 1 of the structure to be inspected, and the metal ion coloring portion 5 is formed on the porous body 3 containing the deterioration detection material installed on the surface of the detection area 1.
  • FIG. 13A an example in which the deterioration detection structure 50 is detected using the inspection apparatus 100 is illustrated.
  • the inspection apparatus 100 includes a moving body 101 and a detection apparatus 102.
  • FIG. 13A shows the inspection apparatus 100 as viewed from the side surface in the traveling direction.
  • the moving body 101 is, for example, a railway vehicle, a four-wheeled vehicle, a motorcycle vehicle, or an inspection robot, and moves along the surface of the detection region 1 of the structure to be inspected, for example, as indicated by the arrow direction in FIG. .
  • Examples of the detection device 102 include imaging devices such as a CCD camera, a commercially available digital camera, and a silver salt camera, and photometers such as a line sensor camera and an area sensor camera. When a photometer is used, a change in the intensity of the wavelength of the color developing portion is measured.
  • the detection device 102 continuously photographs the surface of the deterioration detection structure 50 while being moved by the moving body 101. At this time, the metal ion coloring portion 5 generated on the surface of the porous body 3 is also imaged.
  • the inspection apparatus 100 is provided with a position detection device in addition to the detection device 102 so that the position information of the test position can be acquired.
  • a position detection device it is preferable to install it as close to the detection device 102 as possible.
  • the position of the position detection device is not particularly limited as long as the position information obtained by the position detection device can be associated with the detection device 102.
  • FIG. 13B is a diagram illustrating an example of a deterioration detection method using the deterioration detection structure 50 according to the first embodiment.
  • FIG. 13B is a modification of the detection method shown in FIG. 13A, and description of the same reference numerals as in FIG. 13A is omitted.
  • the detection device 102 is fixedly installed on the wall surface 103. That is, the detection device 102 may not necessarily be installed on the moving body 101 and may be fixedly installed as long as the surface of the porous body 3 containing the deterioration detection material can be imaged.
  • FIG. 14 is a diagram illustrating an example of a deterioration detection method using the deterioration detection structure 50 according to the first embodiment.
  • FIG. 14 is a modification of the detection method shown in FIGS. 13A and 13B, and the description of the same reference numerals as those in FIGS. 13A and 13B is omitted.
  • the inspection worker 104 inspects the deterioration detection structure 50. That is, in the example illustrated in FIG. 14, the inspection worker 104 inspects the surface of the deterioration detection structure 50 while moving with the detection device 102.
  • the inspection worker 104 moves while holding the detection device 102.
  • the deterioration inspection can be performed by setting the detection device 102 to a robot or the like and moving it to the inspection position. You may make it carry out automatically.
  • FIGS. 13A, 13B and 14 as the deterioration detection structure 50, the form in which the porous body 3 containing the deterioration detection material is installed on the entire surface of the detection region 1 of the structure to be inspected is shown.
  • the porous body 3 does not necessarily have to be installed on the entire surface of the detection region 1.
  • the porous body 3 may be installed on the surface of the detection region 1 at regular intervals.
  • the porous body 3 containing the deterioration detection material is installed only in the easily corroded portion, and the portion is concentrated. You may make it inspect.
  • FIG. 16 is a block diagram illustrating a configuration of the deterioration detection system.
  • the deterioration detection system includes a deterioration detection structure 201 containing a deterioration detection material installed on the surface of a detection area 1 of a structure to be inspected, a detection device 102 that detects a deterioration state of the detection area 1, and a detection.
  • a storage unit 203 for storing the data obtained by the device 102, a processing unit 204 for processing the data obtained by the detection device 102, and a display unit 205 for displaying the processing data obtained by the processing unit 204. is doing.
  • the deterioration detection structure 201 for example, the deterioration detection structures 50 to 52 described in the first to third embodiments can be applied.
  • a deterioration detection method using the deterioration detection system shown in FIG. 16 will be described with reference to a flowchart shown in FIG.
  • a description will be given of a mode in which the detection device 102 is an imaging device and the surface of the degradation detection structure 201 is imaged by an imaging means to perform degradation detection.
  • the detection device 102 as an imaging device images the surface of the deterioration detection structure 201 (S401).
  • the determination of the presence or absence of the color developing portion can be performed by visual observation, for example.
  • the previous captured image is compared with the current captured image, and the coloring amount is compared (S403).
  • the processing unit 204 reads the previously captured image data stored in the storage unit 203, and determines the color development amount of the previous captured image data and the color development amount of the current captured image data for each pixel. Count to calculate.
  • the previously captured image is imaged data that is different from the image captured this time.
  • the processing unit 204 compares and compares the color development amount of the captured image in the initial state with the color development amount of the current captured image.
  • the progress of corrosion is grasped by comparison with the previous captured image.
  • the color development amount of the captured image in the initial state is not limited to the captured image, and may be registered as data.
  • the deterioration detection structure is installed before the structure deteriorates, the undegraded state becomes the initial state, and color development does not occur. That is, if there is no color development, the initial color development amount can be specified without imaging.
  • the captured image will be described as an initial state.
  • the concept includes that in which the color development amount is registered as data.
  • the processing unit 204 calculates the progress rate of corrosion by comparing the color development amount of the captured image in the initial state with the color development amount of the current captured image in time series. By grasping the progress rate of corrosion, it is possible to predict how the corrosion of the corresponding part will proceed in the future.
  • the processing unit 204 collates the corrosion progress rate data obtained in S404 and the color development amount data obtained in S403 with predetermined inspection standards (color development area, color development amount, etc.), and degrades such as damage due to corrosion.
  • a screen for warning of deterioration is displayed on the display unit 205 (S405).
  • the processing unit 204 can also display on the display unit 205 the color development amount data obtained in S403 to S404 and data relating to the progress rate of corrosion.
  • the processing unit 204 stores the captured image data obtained in S401 together with the data related to the color development amount and the data related to the progress speed of corrosion in the storage unit 203 (S406), and ends the inspection.
  • the captured image data obtained in S401 is stored in the storage portion 203 (S407), and the inspection is terminated.
  • the installation location of the storage unit 203 that stores captured image data and the like is not particularly limited, and may be built in, for example, the detection apparatus 102 illustrated in FIG.
  • the storage unit 203 may be a storage stored via a network, and the data storage location can be changed as appropriate.
  • the storage unit 203 in addition to the detection data obtained by the detection device 102, the position information of the structure to be inspected, the structure name allocated in advance for each structure, the structure identification code, the position information of the imaging region It is preferable to store information such as the position information of the imaging region in the structure and the imaging date and time.
  • the information displayed on the display unit is not limited to the captured image and the detection data, and the captured image and the like may be continuously displayed in time series. As a result, not only the color development amount data but also the manager or the like can visually confirm the change in the deterioration state of the detection target from the past to the present through time-lapse observation.
  • the inspection worker 104 can inspect the area in a concentrated manner and calculate the number of days for which repair work is required.
  • the maintenance company can predict the repair method and the process required for the repair.
  • the administrator who has proposed maintenance can select one of the presented repair methods, and can request a quotation from the supplier or place an order.
  • the determination method of the similar state may be performed by a method using a correlation function. From the data obtained by arranging the data on the corrosion state obtained by the detection device in time series, the following state is obtained using a known method. An estimation method may be used. Thereby, the expansion state and progress state of corrosion in a similar structure can be predicted. Moreover, based on these prediction information, the repair material required for repair work can be prepared in advance.

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Abstract

L'invention concerne une structure, un procédé et un système de détection de dégradation qui sont capables de détecter la corrosion dans une structure d'une manière simple et stable. La structure de détection de dégradation, qui détecte la dégradation dans une structure, comporte une première surface 3a qui est en contact avec la région 1 soumise à détection, une seconde surface 3b qui est séparée de la première surface 3a, un matériau de détection de dégradation qui se trouve dans une région située entre la première surface 3a et la seconde surface 3b et qui sert à détecter la dégradation, et une pluralité de vides 2 qui sont formés entre la première surface 3a et la seconde surface 3b.
PCT/JP2015/073614 2015-08-21 2015-08-21 Structure, procédé et système de détection de dégradation WO2017033242A1 (fr)

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CN111965095A (zh) * 2020-06-28 2020-11-20 中汽数据有限公司 一种环境腐蚀因素检测系统及检测方法
JP2020204542A (ja) * 2019-06-18 2020-12-24 朝日エティック株式会社 鉄系構造物の腐食検知システム
CN112630129A (zh) * 2020-10-28 2021-04-09 中冶建筑研究总院有限公司 一种frp材料的侵蚀扩散深度的测量装置
CN112986125A (zh) * 2021-02-26 2021-06-18 武汉材料保护研究所有限公司 一种用于测量导电涂层与被保护的基材之间电偶腐蚀的试样及评价方法
JP2021118518A (ja) * 2020-01-29 2021-08-10 株式会社イクシス 腐食解析システム
JP2021149670A (ja) * 2020-03-19 2021-09-27 水ｉｎｇ株式会社 水処理施設の巡回点検方法
WO2022239175A1 (fr) * 2021-05-13 2022-11-17 日本電信電話株式会社 Structure

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JPS5614943A (en) * 1979-07-06 1981-02-13 Minnesota Mining & Mfg Indicator material
JPH07149070A (ja) * 1993-11-26 1995-06-13 Dainippon Printing Co Ltd 中間転写記録媒体
JP2009506327A (ja) * 2005-08-26 2009-02-12 ローレンス リヴァーモア ナショナル セキュリティ，エルエルシー 腐食を検出するための塗料、並びに、腐食、化学侵襲、及び放射性侵襲の警告方法
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Publication number Priority date Publication date Assignee Title
JP2020204542A (ja) * 2019-06-18 2020-12-24 朝日エティック株式会社 鉄系構造物の腐食検知システム
JP7117007B2 (ja) 2019-06-18 2022-08-12 朝日エティック株式会社 鉄系構造物の腐食検知システム
JP2021118518A (ja) * 2020-01-29 2021-08-10 株式会社イクシス 腐食解析システム
JP7403124B2 (ja) 2020-01-29 2023-12-22 株式会社イクシス 腐食解析システム
JP2021149670A (ja) * 2020-03-19 2021-09-27 水ｉｎｇ株式会社 水処理施設の巡回点検方法
JP7451251B2 (ja) 2020-03-19 2024-03-18 水ｉｎｇ株式会社 水処理施設の巡回点検システム、無人移動ユニット及びプログラム
CN111965095A (zh) * 2020-06-28 2020-11-20 中汽数据有限公司 一种环境腐蚀因素检测系统及检测方法
CN112630129A (zh) * 2020-10-28 2021-04-09 中冶建筑研究总院有限公司 一种frp材料的侵蚀扩散深度的测量装置
CN112630129B (zh) * 2020-10-28 2023-10-20 中冶建筑研究总院有限公司 一种frp材料的侵蚀扩散深度的测量装置
CN112986125A (zh) * 2021-02-26 2021-06-18 武汉材料保护研究所有限公司 一种用于测量导电涂层与被保护的基材之间电偶腐蚀的试样及评价方法
WO2022239175A1 (fr) * 2021-05-13 2022-11-17 日本電信電話株式会社 Structure

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