Magnetic inversion method and system for space corrosion non-uniformity of concrete structure steel bar and storage medium

Abstract

The invention discloses a concrete structure steel bar space corrosion unevenness magnetic inversion method and system and a storage medium, and relates to the technical field of concrete structure detection, and the method comprises the steps: determining a space magnetic field scanning path according to the position of a corroded steel bar in an existing concrete structure; obtaining a steel bar space magnetic field information sequence in a wide W magnetic field scanning area on the space magnetic field scanning path; calculating a steel bar corrosion non-uniformity sequence and a steel bar corrosion average corrosion rate space distribution sequence; calculating a final correction value of the steel bar corrosion non-uniformity; and based on the final correction value of the steel bar corrosion unevenness, obtaining a steel bar corrosion unevenness space distribution result in the wide W magnetic field scanning area on the concrete structure. The method does not need to pre-embed a sensor, does not depend on long-term monitoring, has no damage to the concrete structure, and has no influence on the service performance of the concrete structure. And the detection method has the characteristics of convenience, low cost, high precision and stable effect.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete structure detection, and more particularly to a magnetic inversion method, system and storage medium for spatial corrosion non-uniformity of steel bars in a concrete structure. Background Art

[0002] At present, reinforced concrete structures are widely used in infrastructure and are of great significance to social public services and economic development. However, due to the erosion of the external environment, the steel bars inside the concrete structure will have serious corrosion problems. Corrosion leads to a reduction in the effective cross-sectional area of ​​the steel bars, degradation of the steel-concrete bond, and a reduction in the strength of the steel bars, which ultimately reduces the reliability of the concrete structure. In order to accurately evaluate the reliability of existing corroded concrete structures, accurate detection of the uneven degree of steel bar corrosion is a major focus. However, there is currently no effective detection method for the unevenness of corroded steel bars inside existing concrete structures, which makes it difficult to accurately consider the impact of uneven steel bar corrosion in the reliability evaluation of existing corroded concrete structures, and the accuracy is insufficient.

[0003] However, currently, the unevenness of steel corrosion inside existing corroded concrete structures is mainly estimated through the Gumbel probability distribution model of the spatial unevenness index R. This model first estimates the theoretical value of the average steel corrosion rate based on environmental parameters and material parameters; then, the position parameters and shape parameters of the Gumbel probability distribution model are determined based on the theoretical value of the average steel corrosion rate; then, the probability distribution result of the index R is obtained to achieve the theoretical estimation of the unevenness of steel corrosion. However, in the actual environment, the steel corrosion is extremely random and the uneven corrosion morphology is very complex. The unevenness of steel corrosion measured by this model is often far from the actual situation, and it is unable to characterize the spatial distribution characteristics of the unevenness of steel corrosion. As a result, the reliability assessment results of existing corroded concrete structures based on this model have large errors.

[0004] In general, due to the strong randomness of steel bar corrosion and the limitations of existing theoretical models, it is difficult to accurately evaluate the corrosion unevenness and reliability of existing concrete structures.

[0005] Therefore, how to accurately evaluate the uneven corrosion of existing concrete structures is an urgent problem that technical personnel in this field need to solve. Summary of the invention

[0006] In view of this, the present invention provides a magnetic inversion method, system and storage medium for spatial corrosion unevenness of steel bars in concrete structures. By testing and analyzing the spatial magnetic field variation characteristics caused by corrosion, the spatial corrosion unevenness of steel bars in concrete structures can be accurately inverted. The present invention does not require pre-embedded sensors, is easy to operate, has low cost and strong adaptability.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A magnetic inversion method for spatial corrosion non-uniformity of steel bars in concrete structures, comprising:

[0009] S1: Determine the spatial magnetic field scanning path according to the location of the corroded steel bars in the existing concrete structure;

[0010] S2: obtaining a spatial magnetic field information sequence of steel bars within a wide W magnetic field scanning area on a spatial magnetic field scanning path;

[0011] S3: According to the spatial magnetic field information sequence of the steel bar, the steel bar corrosion unevenness sequence is calculated;

[0012] S4: Calculate the average cross-sectional corrosion rate of the steel bars at a point on the spatial magnetic field scanning path, repeat m times to obtain the spatial distribution sequence of the average corrosion rate of the steel bars;

[0013] S5: According to the spatial distribution sequence of the average corrosion rate of steel bar corrosion, the final correction value of the steel bar corrosion unevenness is obtained;

[0014] S6: Based on the final correction value of the steel bar corrosion unevenness, the spatial distribution results of the steel bar corrosion unevenness in the wide W magnetic field scanning area on the concrete structure are obtained.

[0015] Optionally, the S3 specifically includes:

[0016] S301: Obtaining a sequence of fluctuation amplitudes of the spatial magnetic field of the corroded steel bar;

[0017] AH i =|H i-SG -H i |;

[0018] In the formula, H i is the path coordinate x i The spatial magnetic field strength, AH i is the amplitude of the spatial magnetic field fluctuation, H i-SG is the Savitzky-Golay filtered value of the spatial magnetic field intensity sequence;

[0019] S302: Extract sequence [x i , A.H. i ]determined spatial magnetic field intensity curve extreme point sequence [x ej , H ej ], where j = 1, 2, 3, ..., x i is the path coordinate, H ej is the jth magnetic field strength value point, x ej Yes H ej The corresponding coordinates;

[0020] S303: extracting spatial magnetic field variation rate sequence;

[0021]

[0022] In the formula, H em is the mth magnetic field strength value point, x em Yes H em The corresponding coordinates, H cm is the mth spatial magnetic field variation value, x cm Yes H cm The corresponding coordinates are m=1,2,3,…,j-1;

[0023] S304: Calculate the probability distribution of steel bar corrosion unevenness;

[0024]

[0025] In the formula, PDF(C m ) is the coordinate x cm Uneven corrosion degree C m The probability density distribution function of , W(·) is the Weibull distribution function, G(·) is the gamma distribution function, α and β are the names of the distribution function variables, a1, a2, a3 and a4 are the four distribution parameters;

[0026] S305: Calculate PDF (C m )'s expectation C Em As an estimate of the unevenness of corrosion;

[0027] S306: Repeat S305 for m times to obtain the steel bar corrosion unevenness sequence [x cm , C Em ].

[0028] Optionally, the S4 specifically includes:

[0029] S401: Use the crack observation instrument to measure the coordinate x cm The width of the rust expansion cracks at

[0030] S402: Calculate coordinate x cm Average cross-sectional corrosion rate of steel bars;

[0031]

[0032] Where η avm is the average cross-sectional corrosion rate, c is the thickness of the concrete cover, d is the original diameter of the steel bar, a and b are two coefficients, n is the volume expansion rate of the corrosion product, and w m is the coordinate x cm The width of the rust expansion crack at d1 is the nominal diameter of the corroded steel bar;

[0033] S403: Repeat S402 for m times to obtain the spatial distribution sequence of the average corrosion rate of steel bar corrosion [x cm , η avm ].

[0034] Optionally, the S5 specifically includes:

[0035] S501: Calculate the initial value of the maximum cross-sectional corrosion rate of the steel bar;

[0036] η maxm =1-C Em +C Em ·η avm ;

[0037] Where η maxm is the coordinate x cm The maximum cross-sectional corrosion rate at ;

[0038] S502: Calculate the initial value of the corrosion unevenness correction value;

[0039]

[0040] Where C' Em As the corrosion unevenness C Em Initial value of correction, R c is the correction ratio for the effects of corrosion products and concrete;

[0041] S503: Calculate the maximum cross-sectional corrosion rate correction value of the steel bar;

[0043] η' maxm =1-C' Em +C' Em ·η avm ;

[0044] Where η avm is the average cross-sectional corrosion rate, η' maxm is the coordinate x cm Correction value of maximum cross-section corrosion rate at;

[0045] S504: Repeat S501 to S503, iterating until the two adjacent maximum cross-section corrosion rate correction values ​​η' maxm The absolute difference between them is less than 0.01, and C' Em As coordinate x cm The final correction value of the rust unevenness.

[0046] Optionally, the S6 specifically includes:

[0047] S601: Repeat S501 to S504 for m times to obtain the correction sequence of steel bar corrosion unevenness [x cm , C' Em ];

[0048] S602: According to the sequence [x cm , C' Em ]The corrosion unevenness curve was drawn to obtain the spatial distribution results of the steel bar corrosion unevenness in the wide W magnetic field scanning area on the concrete structure.

[0049] A magnetic inversion system for spatial corrosion non-uniformity of steel bars in concrete structures, comprising:

[0050] A scanning path determination module determines the spatial magnetic field scanning path according to the location of the corroded steel bars in the existing concrete structure;

[0051] A steel bar spatial magnetic field information sequence acquisition module is used to obtain a steel bar spatial magnetic field information sequence within a wide W magnetic field scanning area on a spatial magnetic field scanning path;

[0052] A steel bar corrosion unevenness sequence calculation module calculates the steel bar corrosion unevenness sequence according to the steel bar spatial magnetic field information sequence;

[0053] The module for calculating the spatial distribution sequence of the average corrosion rate of steel bar corrosion calculates the average cross-sectional corrosion rate of the steel bar at a point on the spatial magnetic field scanning path, and repeats this m times to obtain the spatial distribution sequence of the average corrosion rate of steel bar corrosion;

[0054] A module for determining the final correction value of the steel bar corrosion unevenness obtains the final correction value of the steel bar corrosion unevenness according to the spatial distribution sequence of the average corrosion rate of the steel bar corrosion;

[0055] The inhomogeneity spatial distribution result output module obtains the inhomogeneity spatial distribution result of steel bar corrosion in the wide W magnetic field scanning area on the concrete structure based on the final correction value of the steel bar corrosion inhomogeneity.

[0056] A storage medium stores a computer program. When the computer program is run on a computer, the computer is enabled to execute a magnetic inversion method for spatial corrosion non-uniformity of steel bars in a concrete structure.

[0057] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a magnetic inversion method, system and storage medium for spatial corrosion unevenness of steel bars in concrete structures. By testing and analyzing the spatial magnetic field variation characteristics caused by corrosion, the spatial corrosion unevenness of steel bars in concrete structures can be accurately inverted. The present invention does not require pre-embedded sensors, does not rely on long-term monitoring, does not cause any damage to the concrete structure, and does not have any impact on the service performance of the concrete structure. It also has the characteristics of convenient detection method, low cost, high accuracy and stable effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0059] Figure 1 A flow chart of the method provided by the present invention;

[0060] Figure 2 This is a schematic diagram of the detection work provided by the present invention. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] The embodiment of the present invention discloses a magnetic inversion method for spatial corrosion non-uniformity of steel bars in concrete structures, such as Figure 1 As shown, including:

[0063] S1: Determine the spatial magnetic field scanning path according to the location of the corroded steel bars in the existing concrete structure;

[0064] S2: Obtain the spatial magnetic field information sequence of the steel bars in the wide W magnetic field scanning area on the spatial magnetic field scanning path [x i , H i ](i=1,2,3,…,W), where x i is the path coordinate, H i is the spatial magnetic field strength at the coordinate point;

[0065] S3: According to the spatial magnetic field information sequence of the steel bar, the steel bar corrosion unevenness sequence is calculated;

[0066] S4: Calculate the average cross-sectional corrosion rate of the steel bars at a point on the spatial magnetic field scanning path, repeat m times to obtain the spatial distribution sequence of the average corrosion rate of the steel bars;

[0067] S5: According to the spatial distribution sequence of the average corrosion rate of steel bar corrosion, the final correction value of the steel bar corrosion unevenness is obtained;

[0068] S6: Based on the final correction value of the steel bar corrosion unevenness, the spatial distribution results of the steel bar corrosion unevenness in the wide W magnetic field scanning area on the concrete structure are obtained.

[0069] In a specific embodiment, S3 specifically includes:

[0070] S301: Obtaining a sequence of fluctuation amplitudes of the spatial magnetic field of the corroded steel bar;

[0071] AH i =|H i-SG -H i |;

[0072] In the formula, H i is the path coordinate x i The spatial magnetic field strength, AH i is the amplitude of the spatial magnetic field fluctuation, H i-SG is the Savitzky-Golay filtered value of the spatial magnetic field intensity sequence;

[0073] S302: Extract sequence [x i , A.H. i ]determined spatial magnetic field intensity curve extreme point sequence [x ej , H ej ], where j = 1, 2, 3, ..., x i is the path coordinate, H ej is the jth magnetic field strength value point, x ej Yes H ej The corresponding coordinates;

[0074] S303: extracting spatial magnetic field variation rate sequence;

[0075]

[0076] In the formula, H em is the mth magnetic field strength value point, x em Yes H em The corresponding coordinates, H cm is the mth spatial magnetic field variation value, x cm Yes H cm The corresponding coordinates are m=1,2,3,…,j-1;

[0077] S304: Calculate the probability distribution of steel bar corrosion unevenness;

[0078]

[0079] In the formula, PDF(C m ) is the coordinate x cm Uneven corrosion degree C m The probability density distribution function of , W(·) is the Weibull distribution function, G(·) is the gamma distribution function, α and β are the names of the distribution function variables, a1, a2, a3 and a4 are the four distribution parameters;

[0080] S305: Calculate PDF (C m )'s expectation C Em As an estimate of the unevenness of corrosion;

[0081] S306: Repeat S305 for m times to obtain the steel bar corrosion unevenness sequence [x cm , C Em ].

[0082] In a specific embodiment, S4 specifically includes:

[0083] S401: Use the crack observation instrument to measure the coordinate x cm The width of the rust expansion cracks at

[0084] S402: Calculate coordinate x cm Average cross-sectional corrosion rate of steel bars;

[0085]

[0086] Where η avm is the average cross-sectional corrosion rate, c is the thickness of the concrete cover, d is the original diameter of the steel bar, a and b are two coefficients, n is the volume expansion rate of the corrosion product (taken as 1.45), w m is the coordinate x cm The width of the rust expansion crack at d1 is the nominal diameter of the corroded steel bar;

[0087] S403: Repeat S402 for m times to obtain the spatial distribution sequence of the average corrosion rate of steel bar corrosion [x cm , η avm ].

[0088] In a specific embodiment, S5 specifically includes:

[0089] S501: Calculate the initial value of the maximum cross-sectional corrosion rate of the steel bar;

[0090] η maxm =1-C Em +C Em ·η avm ;

[0091] Where η maxm is the coordinate x cm The maximum cross-sectional corrosion rate at ;

[0092] S502: Calculate the initial value of the corrosion unevenness correction value;

[0093]

[0094] Where C' Em As the corrosion unevenness C Em Initial value of correction, Rc is the correction ratio for the effects of corrosion products and concrete (taken as 0.05);

[0095] S503: Calculate the maximum cross-sectional corrosion rate correction value of the steel bar;

[0097] η' maxm =1-C' Em +C' Em ·η avm ;

[0098] Where η avm is the average cross-sectional corrosion rate, η' maxm is the coordinate x cm Correction value of maximum cross-section corrosion rate at;

[0099] S504: Repeat S501 to S503, iterating until the two adjacent maximum cross-section corrosion rate correction values ​​η' maxm The absolute difference between them is less than 0.01, and C' Em As coordinate x cm The final correction value of the rust unevenness.

[0100] In a specific embodiment, S6 specifically includes:

[0101] S601: Repeat S501 to S504 for m times to obtain the correction sequence of steel bar corrosion unevenness [x cm , C' Em ];

[0102] S602: According to the sequence [x cm , C' Em ]The corrosion unevenness curve was drawn to obtain the spatial distribution results of the steel bar corrosion unevenness in the wide W magnetic field scanning area on the concrete structure.

[0103] In a specific embodiment, the detection working diagram of this embodiment is as follows: Figure 2 As shown, it is used to detect the corrosion of steel bars in reinforced concrete structures. Through micromagnetic sensors and magnetic field scanning paths, the degree of corrosion of steel bars can be detected non-invasively, thereby evaluating the safety and reliability of the structure.

[0104] A magnetic inversion system for spatial corrosion non-uniformity of steel bars in concrete structures, comprising:

[0105] A scanning path determination module determines the spatial magnetic field scanning path according to the location of the corroded steel bars in the existing concrete structure;

[0106] A steel bar spatial magnetic field information sequence acquisition module is used to obtain a steel bar spatial magnetic field information sequence within a wide W magnetic field scanning area on a spatial magnetic field scanning path;

[0107] A steel bar corrosion unevenness sequence calculation module calculates the steel bar corrosion unevenness sequence according to the steel bar spatial magnetic field information sequence;

[0108] The module for calculating the spatial distribution sequence of the average corrosion rate of steel bar corrosion calculates the average cross-sectional corrosion rate of the steel bar at a point on the spatial magnetic field scanning path, and repeats this m times to obtain the spatial distribution sequence of the average corrosion rate of steel bar corrosion;

[0109] A module for determining the final correction value of the steel bar corrosion unevenness obtains the final correction value of the steel bar corrosion unevenness according to the spatial distribution sequence of the average corrosion rate of the steel bar corrosion;

[0110] The inhomogeneity spatial distribution result output module obtains the inhomogeneity spatial distribution result of steel bar corrosion in the wide W magnetic field scanning area on the concrete structure based on the final correction value of the steel bar corrosion inhomogeneity.

[0111] A storage medium stores a computer program. When the computer program is run on a computer, the computer is enabled to execute a magnetic inversion method for spatial corrosion non-uniformity of steel bars in a concrete structure.

[0112] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0113] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic inversion method for spatial corrosion non-uniformity of steel bars in concrete structures, characterized in that: include: S1: Determine the spatial magnetic field scanning path according to the location of the corroded steel bars in the existing concrete structure; S2: obtaining a spatial magnetic field information sequence of steel bars within a wide W magnetic field scanning area on a spatial magnetic field scanning path; S3: According to the spatial magnetic field information sequence of the steel bar, the steel bar corrosion unevenness sequence is calculated; S4: Calculate the average cross-sectional corrosion rate of the steel bars at a point on the spatial magnetic field scanning path, repeat m times to obtain the spatial distribution sequence of the average corrosion rate of the steel bars; S5: According to the spatial distribution sequence of the average corrosion rate of steel bar corrosion, the final correction value of the steel bar corrosion unevenness is obtained; S6: Based on the final correction value of the steel bar corrosion unevenness, the spatial distribution results of the steel bar corrosion unevenness in the wide W magnetic field scanning area on the concrete structure are obtained.

2. The magnetic inversion method for spatial corrosion non-uniformity of steel bars in concrete structures according to claim 1 is characterized in that: The S3 specifically includes: S301: Obtaining a sequence of fluctuation amplitudes of the spatial magnetic field of the corroded steel bar; AH i =|H i-SG -H i |; In the formula, H i is the path coordinate x i The spatial magnetic field strength, AH i is the amplitude of the spatial magnetic field fluctuation, H i-SG is the Savitzky-Golay filtered value of the spatial magnetic field intensity sequence; S302: Extract sequence [x i , A.H. i ]determined spatial magnetic field intensity curve extreme point sequence [x ej , H ej ], where j = 1, 2, 3, ..., x i is the path coordinate, H ej is the jth magnetic field strength value point, x ej Yes H ej The corresponding coordinates; S303: extracting spatial magnetic field variation rate sequence; In the formula, H em is the mth magnetic field strength value point, x em Yes H em The corresponding coordinates, H cm is the mth spatial magnetic field variation value, x cm Yes H cm The corresponding coordinates are m=1,2,3,…,j-1; S304: Calculate the probability distribution of steel bar corrosion unevenness; In the formula, PDF(C m ) is the coordinate x cm Uneven corrosion degree C m The probability density distribution function of , W(·) is the Weibull distribution function, G(·) is the gamma distribution function, α and β are the names of the distribution function variables, a1, a2, a3 and a4 are the four distribution parameters; S305: Calculate PDF (C m )'s expectation C Em As an estimate of the unevenness of corrosion; S306: Repeat S305 for m times to obtain the steel bar corrosion unevenness sequence [x cm , C Em ].

3. The magnetic inversion method for spatial corrosion non-uniformity of steel bars in concrete structures according to claim 2 is characterized in that: The S4 specifically includes: S401: Use the crack observation instrument to measure the coordinate x cm The width of the rust expansion cracks at S402: Calculate coordinate x cm Average cross-sectional corrosion rate of steel bars; Where η avm is the average cross-sectional corrosion rate, c is the thickness of the concrete cover, d is the original diameter of the steel bar, a and b are two coefficients, n is the volume expansion rate of the corrosion product, and w m is the coordinate x cm The width of the rust expansion crack at d1 is the nominal diameter of the corroded steel bar; S403: Repeat S402 for m times to obtain the spatial distribution sequence of the average corrosion rate of steel bar corrosion [x cm , η avm ].

4. The magnetic inversion method for spatial corrosion non-uniformity of steel bars in concrete structures according to claim 1 is characterized in that: The S5 specifically includes: S501: Calculate the initial value of the maximum cross-sectional corrosion rate of the steel bar; or maxm =1-C Em +C Em ·or avm ; Where η maxm is the coordinate x cm The maximum cross-sectional corrosion rate at ; S502: Calculate the initial value of the corrosion unevenness correction value; Where C' Em As the corrosion unevenness C Em Initial value of correction, R c is the correction ratio for the effects of corrosion products and concrete; S503: Calculate the maximum cross-sectional corrosion rate correction value of the steel bar; or' maxm =1-C' Em +C' Em ·or avm ; Where η avm is the average cross-sectional corrosion rate, η' maxm is the coordinate x cm Correction value of maximum cross-section corrosion rate at; S504: Repeat S501 to S503, iterating until the two adjacent maximum cross-section corrosion rate correction values ​​η' maxm The absolute difference between them is less than 0.01, and C' Em As coordinate x cm The final correction value of the rust unevenness.

5. The magnetic inversion method for spatial corrosion non-uniformity of steel bars in concrete structures according to claim 1 is characterized in that: The S6 specifically includes: S601: Repeat S501 to S504 for m times to obtain the correction sequence of steel bar corrosion unevenness [x cm , C' Em ]; S602: According to the sequence [x cm , C' Em ]The corrosion unevenness curve was drawn to obtain the spatial distribution results of the steel bar corrosion unevenness in the wide W magnetic field scanning area on the concrete structure.

6. A magnetic inversion system for spatial corrosion non-uniformity of steel bars in concrete structures, characterized in that: A magnetic inversion method for spatial corrosion non-uniformity of steel bars in a concrete structure according to any one of claims 1 to 5 is applied, comprising: A scanning path determination module determines the spatial magnetic field scanning path according to the location of the corroded steel bars in the existing concrete structure; A steel bar spatial magnetic field information sequence acquisition module is used to obtain a steel bar spatial magnetic field information sequence within a wide W magnetic field scanning area on a spatial magnetic field scanning path; A steel bar corrosion unevenness sequence calculation module calculates the steel bar corrosion unevenness sequence according to the steel bar spatial magnetic field information sequence; The module for calculating the spatial distribution sequence of the average corrosion rate of steel bar corrosion calculates the average cross-sectional corrosion rate of the steel bar at a point on the spatial magnetic field scanning path, and repeats this m times to obtain the spatial distribution sequence of the average corrosion rate of steel bar corrosion; A module for determining the final correction value of the steel bar corrosion unevenness obtains the final correction value of the steel bar corrosion unevenness according to the spatial distribution sequence of the average corrosion rate of the steel bar corrosion; The inhomogeneity spatial distribution result output module obtains the inhomogeneity spatial distribution result of steel bar corrosion in the wide W magnetic field scanning area on the concrete structure based on the final correction value of the steel bar corrosion inhomogeneity.

7. A storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is run on a computer, the computer executes the magnetic inversion method for spatial corrosion non-uniformity of steel bars in a concrete structure as described in any one of claims 1 to 5.

Images