Resistivity measuring device and method for reinforced concrete rod piece, electronic equipment and storage medium

Abstract

The invention provides a resistivity measurement device and method for a reinforced concrete rod piece, electronic equipment and a storage medium, and relates to the field of electrical engineering and the field of constructional engineering. The device comprises a plurality of electrodes which are arranged on the first surface of a concrete rod piece at equal intervals, and comprises at least two working electrodes which are arranged at the head ends and the tail ends of the plurality of electrodes and are electrically connected with a power supply; at least two intermediate electrodes arranged between the at least two working electrodes; the measuring device is electrically connected with the at least two intermediate electrodes, and the measuring device is configured to measure a target potential difference between the at least two intermediate electrodes; the processor module is configured to process the target potential difference and the current value of the detection current based on a resistivity simulation function to obtain a resistivity simulation value; and determining the resistivity of the concrete rod piece based on a size correction coefficient associated with the structural size of the concrete rod piece and the resistivity simulation value.

Description

Technical Field

[0001] The present disclosure relates to the fields of electrical engineering and construction engineering, and more specifically, to a resistivity measuring device, method, electronic equipment and storage medium for reinforced concrete rods. Background Art

[0002] Concrete rods can be concrete structures with slender structures such as concrete electric poles. The resistivity of concrete rods is closely related to indicators such as chloride ion permeability or component cracks. Therefore, how to quickly and accurately measure the resistivity of concrete rods on site will have a significant impact on the construction process and maintenance process of related engineering projects such as construction engineering and electrical engineering. However, the resistivity detection method for concrete rods usually has low detection accuracy. Summary of the invention

[0003] In view of this, the present disclosure provides a resistivity measurement device, method, electronic device and storage medium for reinforced concrete rods.

[0004] One aspect of the present disclosure provides a resistivity measuring device for reinforced concrete rods, comprising: a plurality of electrodes, arranged at equal intervals on a first surface of the concrete rod, including: at least two working electrodes, arranged at the head and the tail of the plurality of electrodes, the working electrodes being electrically connected to a power source; at least two intermediate electrodes, arranged between the at least two working electrodes; a measuring device, electrically connected to the at least two intermediate electrodes, the measuring device being configured to measure a target potential difference between the at least two intermediate electrodes when the power source provides a detection current to the at least two working electrodes; a processor module, configured to process the target potential difference and the current value of the detection current based on a resistivity simulation function to obtain a resistivity simulation value; and determining the resistivity of the concrete rod based on a size correction coefficient associated with a structural size of the concrete rod and the resistivity simulation value, wherein the size correction coefficient is determined based on the sample resistivity corresponding to each of the simulated rods with different simulated structural sizes.

[0005] Another aspect of the present disclosure provides a resistivity measurement method for reinforced concrete rods, which is applied to the resistivity measurement device for reinforced concrete rods, and the method includes: processing the target potential difference and the current value of the detection current based on a resistivity simulation function to obtain a resistivity simulation value; determining the resistivity of the concrete rod based on a size correction coefficient associated with the structural size of the concrete rod and the resistivity simulation value, wherein the size correction coefficient is determined based on the sample resistivity corresponding to each of the simulated rods with different simulated structural sizes.

[0006] Another aspect of the present disclosure provides an electronic device, comprising:

[0007] one or more processors;

[0008] a memory for storing one or more programs,

[0009] When the one or more programs are executed by the one or more processors, the one or more processors implement the method.

[0010] Another aspect of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, which are used to implement the above method when executed.

[0011] Another aspect of the present disclosure provides a computer program product, the computer program product comprising computer executable instructions, and the instructions are used to implement the above method when executed.

[0012] According to the embodiments of the present disclosure, by correcting the measured resistivity simulation value through the size correction coefficient, it is possible to correct the problem of low resistivity measurement accuracy of concrete rods caused by polarization errors under the conditions of target potential difference and detection current, thereby achieving accurate measurement of the resistivity of concrete rods in a non-destructive state and improving the resistivity measurement efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0014] Figure 1A A schematic diagram of a resistivity measuring device for reinforced concrete rods to which the present disclosure can be applied is schematically shown.

[0015] Figure 1B The working principle diagram of the resistivity measuring device for reinforced concrete rods according to the embodiment of the present disclosure is schematically shown.

[0016] Figure 2 The application scenario diagram of the resistivity measuring device for reinforced concrete rods according to one embodiment of the present disclosure is schematically shown.

[0017] Figure 3 A diagram schematically shows an application scenario of a resistivity measuring device for reinforced concrete rods according to another embodiment of the present disclosure.

[0018] Figure 4 A block diagram of an electronic device suitable for implementing a resistivity measurement method for reinforced concrete rods according to an embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0019] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0020] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0021] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0022] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0023] In the embodiments of the present disclosure, the collection, updating, analysis, processing, use, transmission, provision, disclosure, storage, etc. of the data involved (for example, including but not limited to user personal information) are in compliance with the provisions of relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. In particular, necessary measures are taken for user personal information to prevent illegal access to user personal information data and maintain the security of user personal information, network security, and national security.

[0024] In the embodiments of the present disclosure, the user's authorization or consent is obtained before obtaining or collecting the user's personal information.

[0025] The inventors found that there are problems such as low detection accuracy in the resistivity detection method for beam-column type slender reinforced concrete rods, such as electric poles, upper chord rods, lower chord rods and other slender concrete rods. Especially when there are unidirectional single-layer distributed steel bars in the concrete rods, the steel bars are distributed along the length direction of the rods. During the test, due to the small width and height of the rods, the accuracy of the concrete resistivity measurement value will be seriously affected, and further affect the judgment of the actual corrosion, chloride ion penetration and crack development of the reinforced concrete rods. Therefore, in the detection process, the influence of the Wenner technology electrode parallel to the steel bar direction must be considered in the special rod case, so as to obtain reliable test results. The resistivity measurement value of the beam-column type slender reinforced concrete rod is close to the actual value after adjustment. The average error of the unadjusted measurement is 41.48%, and the average error of the adjusted measurement is only 1.87%. The adjusted detection technology broadens the application scope of the Wenner technology resistivity detection.

[0026] In view of the low detection accuracy and other problems existing in the current traditional resistivity detection methods, a test method suitable for the resistivity of reinforced concrete structures, the Wenner technology, is proposed. The Wenner technology has gradually become the first choice for laboratory and field resistivity detection because it can well avoid electrode polarization errors and has the advantages of non-destructiveness, safety, rapid measurement and compact design. And because the use of the Wenner technology is based on the assumption that the material is semi-infinite, isotropic and homogeneous, because there is a significant difference in resistivity between concrete and steel bars, due to the presence of steel bars, concrete no longer meets the assumption of isotropic and homogeneous medium, and the current always flows through the path with the least resistance, making the current field unevenly distributed and even having current concentration.

[0027] Embodiments of the present disclosure provide a resistivity measurement device, method, electronic device, and storage medium for reinforced concrete rods, so as to at least partially solve the electrode polarization error in resistivity measurement and realize non-destructive testing of concrete rods.

[0028] An embodiment of the present disclosure provides a resistivity measuring device for a reinforced concrete rod, comprising: a plurality of electrodes, a measuring device, and a processor module.

[0029] According to an embodiment of the present disclosure, a plurality of electrodes are arranged at equal intervals on the first surface of the concrete rod. The plurality of electrodes include: at least two working electrodes and at least two intermediate electrodes.

[0030] At least two working electrodes are arranged at the head end and the tail end of the plurality of electrodes, and the working electrodes are electrically connected to a power source.

[0031] At least two intermediate electrodes are arranged between the at least two working electrodes.

[0032] According to an embodiment of the present disclosure, a measuring device is electrically connected to at least two intermediate electrodes, and the measuring device is configured to measure a target potential difference between the at least two intermediate electrodes when a power supply provides a detection current to the at least two working electrodes.

[0033] According to an embodiment of the present disclosure, the processor module is configured to process the target potential difference and the current value of the detection current based on the resistivity simulation function to obtain a resistivity simulation value; and determine the resistivity of the concrete rod based on the size correction coefficient associated with the structural size of the concrete rod and the resistivity simulation value.

[0034] According to an embodiment of the present disclosure, the size correction coefficient is determined based on the sample resistivity corresponding to each of the simulated rods of different simulated structure sizes.

[0035] According to the embodiments of the present disclosure, the concrete rod may include any type of rod. For example, it may be a rod for a beam-column type slender concrete electric pole. However, it is not limited thereto, and other types of concrete rods may also be included. The embodiments of the present disclosure do not limit the specific type of the concrete rod.

[0036] Figure 1A A schematic diagram of a resistivity measuring device for reinforced concrete rods to which the present disclosure can be applied is schematically shown.

[0037] Figure 1B The working principle diagram of the resistivity measuring device for reinforced concrete rods according to the embodiment of the present disclosure is schematically shown.

[0038] Combination Figure 1A and Figure 1B As shown, the resistivity measuring device for reinforced concrete rods may include a first working electrode 111, a second working electrode 114, a first intermediate electrode 112, and a second intermediate electrode 113, as well as a potential digital sensor 121 and a processor module 130 as measuring devices. The processor module 130 may include a single chip microcomputer and a host computer. The first working electrode 111, the first intermediate electrode 112, the second intermediate electrode 113, and the second working electrode 114 are arranged on the first surface 141 of the concrete rod 140 based on the electrode spacing s. The processor module 130 may control the power supply to provide a detection current to the first working electrode 111 and the second working electrode 114. The potential digital sensor 121 may measure the target potential difference between the first intermediate electrode 112 and the second intermediate electrode 113, and the target potential difference may be output to the processor module 130.

[0039] like Figure 1B As shown, after the detection current is provided to the first working electrode 111 and the second working electrode 114, the current lines and voltage equipotential lines in the concrete rod 140 can be represented based on the solid line curve and the dotted line curve, respectively.

[0040] The processor module 130 processes the target potential difference and the current value of the detection current based on the resistivity simulation function to obtain a resistivity simulation value; based on the size correction coefficient k1 associated with the structural size of the concrete rod and the resistivity simulation value ρ s Determine the resistivity ρ of the concrete bar t .

[0041] According to an embodiment of the present disclosure, the multiple electrodes may be Wenner electrodes, and the multiple electrodes may be arranged in the central area of ​​the first surface of the reinforced concrete rod to be detected, or in an area near the central area of ​​the first surface.

[0042] According to an embodiment of the present disclosure, a conductive paste may be applied to the contact area between the first surface of the reinforced concrete rod and the plurality of electrodes, for example, by evenly applying the conductive paste.

[0043] In one example, by performing multiple resistivity measurements on the concrete rod, multiple resistivities can be determined based on the processor module, and the resistivity of the concrete rod is obtained by determining an average value of the multiple resistivities.

[0044] In one example, the reinforced concrete rod may be an elongated concrete block with components such as steel bars disposed therein.

[0045] According to the embodiments of the present disclosure, by correcting the measured resistivity simulation value through the size correction coefficient, it is possible to correct the resistivity measurement error of the concrete rod under the conditions of the target potential difference and the detection current, realize accurate measurement of the resistivity of the concrete rod in a non-destructive state, and improve the resistivity measurement efficiency and accuracy.

[0046] According to an embodiment of the present disclosure, the size correction coefficient can be obtained by looking up a table. For example, the associated sample size coefficients and sample concrete rod sizes can be stored in a table, and the size correction coefficient can be obtained by looking up the table according to the size of the concrete rod.

[0047] According to an embodiment of the present disclosure, the processor module is configured to: determine an initial resistivity simulation value based on a ratio between a target potential difference and a current value of a detection current; and determine a resistivity simulation value based on the initial resistivity simulation value and an electrode spacing between two different electrodes.

[0048] In one example, the initial resistivity simulation value can be expressed as , where U 23 represents the target potential difference, and I represents the current value of the detection current. Resistivity simulation value ρ s It can be determined based on the following formula (1).

[0049] (1).

[0050] Here, s represents the electrode spacing between two different electrodes, for example, it can be represented as the electrode spacing between two middle electrodes.

[0051] Resistivity of concrete rod ρ t It can be determined based on the following formula (2).

[0052] (2).

[0053] Among them, k1 is the size correction coefficient.

[0054] According to an embodiment of the present disclosure, a size correction factor is determined from a plurality of simulation size correction factors based on the structure size.

[0055] According to an embodiment of the present disclosure, the simulation size correction coefficient is determined based on the following operations: determining a simulation size ratio relationship between multiple different first simulation structure sizes for a simulation rod in a simulation rod; determining a first simulation target potential difference of the first simulation rod under the condition of receiving a simulation current; processing the first simulation target potential difference based on a resistivity simulation function to obtain a first simulation resistivity simulation value; and determining a simulation size correction coefficient corresponding to the simulation size ratio relationship based on a ratio between a preset reference resistivity and the first simulation resistivity simulation value.

[0056] According to an embodiment of the present disclosure, determining a simulated target potential difference of a simulated rod under a condition of receiving a simulated current includes: based on the simulated current, solving a control equation and boundary conditions to obtain the simulated potential difference.

[0057] According to an embodiment of the present disclosure, boundary conditions are used to constrain the current density vector on the surface of the simulated rod to be zero, and the control equation is used to control the product of the gradient of the simulated target potential difference and the gradient of the simulated conductivity of the simulated rod to satisfy a preset balance condition with the product of the second-order gradient of the simulated target potential difference and the simulated conductivity.

[0058] According to an embodiment of the present disclosure, the simulated rod may include a first simulated rod, and the simulated target potential difference may include a first simulated target potential difference.

[0059] According to an embodiment of the present disclosure, the control equation can be expressed based on formula (3), and the boundary condition can be expressed based on formula (4).

[0060] (3);

[0061] n∙J=0 (4).

[0062] Wherein, ρ is the simulated resistivity of the simulated rod, V may represent the simulated target potential difference, n is the normal vector of the simulated rod surface, and J is the current density vector of the closed surface in the simulated rod domain. It should be understood that the simulated rod surface may correspond to the first surface, for example, it may be understood as the surface in the simulated rod that receives the simulated detection current.

[0063] According to the resistivity measurement device provided by the embodiment of the present disclosure, two intermediate electrodes (for example, which can be determined as numbers 2 and 3) can measure the potential difference generated by applying a detection current between two working electrodes (numbers 1 and 4). Therefore, the control equation can simulate the current and potential distribution in the domain. In the present invention, the current density vector J (A / m 2 ) is directly related to the electric field vector E (V / m) in the domain, and the ratio between the current density vector J and the electric field vector E is defined as the conductivity σ (S / m) of the material according to Ohm's law. σ is the inverse of the resistivity, and the electric field vector E is the gradient of the target potential difference V. Therefore, the above control equations and boundary conditions can be solved based on the following formulas (5) to (8):

[0064] (5)

[0065] (6)

[0066] (7)

[0067] Since charge does not accumulate when the material is conductive, the simulated rod satisfies the law of conservation of current when simulating receiving the detection current. Therefore, the current flux entering the closed surface of the conductive material is equal to the current flux leaving the surface, then:

[0068] (8)

[0069] According to an embodiment of the present disclosure, when the simulated rod is a first rod without steel bars, the control equation (3) and the boundary condition (4) can be solved based on the above formulas (5) to (8) to obtain the first simulation target potential difference U 23 Based on formulas (1) and (2), the first simulated resistivity simulation value ρ is determined. t . Divide the preset reference resistivity by the first simulated resistivity analog value ρ t , a simulation size correction coefficient corresponding to the first simulation rod can be determined. The simulation size correction coefficient can be determined in accordance with the simulation size ratio of the first simulation rod.

[0070] According to an embodiment of the present disclosure, the simulated size ratio relationship can be expressed as the ratio relationship between the length (L), width (W) and height (H) of the first simulated rod. For example, the simulated size ratio relationship can be expressed as L:W:H. Similarly, the size ratio relationship of the concrete rod can also be expressed as the ratio relationship between the length (L), width (W) and height (H) of the concrete rod. The embodiments of the present disclosure are not repeated here.

[0071] In one embodiment, the current value of the simulated detection current may be determined to be 1 mA, and the preset reference resistivity may be determined to be 100 Ω·m.

[0072] In one example, the simulated size ratio relationship can be expressed as L / s: W / s: H / s. Where s represents the sample electrode spacing. The size correction coefficient query table of the rod member can be obtained by determining the size correction coefficient k1 corresponding to the simulated size ratio relationship (L / s: W / s: H / s) of each of the different first simulated rod members. In this way, when measuring a concrete rod member, the size correction coefficient query table can be queried by determining the size ratio relationship (L / s: W / s: H / s) of the concrete rod member to obtain the size correction coefficient.

[0073] The size correction coefficient lookup table can be represented based on the following Tables 1 to 3.

[0074] Table 1 L / s: W / s: H / s correction factor k1 (4:1:1~7:2:10)

[0075]

[0076] Table 2 L / s: W / s: H / s correction factor k1 (7:3:1~9:7:10)

[0077]

[0078] Table 3 L / s: W / s: H / s correction factor k1 (9:8:1~10:9:10)

[0079]

[0080] The principle of the invention based on the mapping relationship between the simulation size correction coefficient and the concrete size relationship will be explained below in conjunction with Example 1.

[0081] Example 1

[0082] For the sample concrete rod without steel bar components, in order to analyze the sample concrete rods with different cross-sectional sizes, the length L of the sample concrete rod is fixed at 160 mm, and the resistivity simulation value ρ of the sample concrete rod under different W conditions is recorded by changing the width W. sThe inventors found that when W changes from 40 mm to 320 mm, the resistivity simulation value ρ s Gradually decreases and reaches the base value of 130 As the width W increases, the correction coefficient k1 tends from 0.26 to 1.0, and its growth rate decreases with the increase of width W, and finally stabilizes at 0.91. Since the length L is always 160mm, the measurement of resistivity is slightly affected by continuing to expand the cross-sectional size. When W>200mm, k1 reaches above 0.90. This will cause the error between the resistivity simulation value and the reference resistivity to be less than 10%. Since the surface potential distribution of the specimen changes with the size of the sample rod, the concrete resistivity measurement error of the sample rods with different cross-sectional sizes in this embodiment 1 is between 4.6% and 263.8%.

[0083] When different electrode spacings are set for sample concrete bars without steel bars, the size of the tested concrete bars is fixed, and it is found that when the electrode spacing s changes from 10 mm to 100 mm, the resistivity simulation value ρ s From 133 Down to 132 Later increased to 259 , the minimum value is at s It appears at 20 mm, then gradually increases, and the growth rate also increases, and finally the deviation from the baseline value reaches 98%. This is because in Wenner technology, resistivity is defined as and The product of the target potential difference and the detection current gradually decreases with the increase of the electrode spacing s, where s increases 10 times from 10mm to 100mm, and From 2126 Change to 411 When the spacing is reduced to 1 / 5 of the original value, the increase in spacing s is greater than the decrease in the latter, resulting in the product of the two ρ s When the electrode spacing is small, the current is concentrated inside the cross-sectional area, but when the spacing is wide, the current inside the concrete cross-sectional area gradually diffuses to the edge of the concrete. As s continues to increase, the size effect becomes more significant, and the deviation from the reference value becomes larger. In this embodiment 1, the concrete resistivity measurement error of different electrode spacings is between 7.8% and 49.6%.

[0084] The above-mentioned Example 1 proves that when the Wenner technique is used to measure resistivity, the concrete size and the electrode spacing have a great influence on the measurement results, revealing the influence mechanism of the size effect on the resistivity accuracy of the Wenner technique. This influence mechanism can be expressed as when the cross-sectional size is larger, the potential gradient of the target potential difference between the voltage measuring electrodes is smaller, resulting in a decrease in the resistivity measurement value; the larger the electrode spacing, the smaller the potential gradient between the measuring electrodes, but the decrease is significantly smaller than the increase in the electrode spacing, resulting in a gradual increase in the resistivity measurement value, and the current inside the concrete cross section gradually diffuses to the edge of the concrete, and the cross-sectional boundary gradually affects the current distribution inside the cross section, exacerbating the size effect. Therefore, the size effect correction coefficient k1 under the combined influence of different concrete sizes and electrode spacing is particularly important. In this Example 1, the proportional relationship between the dimensions (L, W, H) of the concrete in all directions and the electrode spacing s is normalized, and the new size effect is considered through dimensionless parameters (L / s, W / s, H / s). According to the orthogonal design of L / s:W / s:H / s from 4:1:1 to 10:10:10, there are 700 groups of corresponding dimensions L, W, and H at each spacing, and the electrode spacings s discussed are 10mm, 30mm, 50mm, and 70mm respectively. The experimental investigation found that under the same size ratio, the size correction coefficient k1 under different spacings s showed good consistency, indicating that the correction coefficient k1 has nothing to do with the specific value of the electrode spacing, but only depends on the proportional relationship between the concrete size and the spacing. Finally, according to the simulation results of the control equations and boundary conditions of the finite element model, the relationship between the simulated size ratio relationship and the simulated size correction coefficient can be determined as the corresponding relationship shown in Tables 1 to 4. Therefore, the corresponding size correction coefficient can be determined by the size ratio relationship of the concrete rod.

[0085] According to an embodiment of the present disclosure, the concrete rod is a reinforced concrete rod provided with steel bars, and the simulation rod includes a second simulation rod provided with simulated steel bars.

[0086] According to an embodiment of the present disclosure, the length extension direction of the steel bar may correspond to the length L of the reinforced concrete rod. Accordingly, the length extension direction of the simulated steel bar in the second simulated rod may correspond to the length L of the second simulated rod.

[0087] According to an embodiment of the present disclosure, the processor module may also be configured to determine the resistivity of the concrete rod based on the size correction factor, the reinforcement correction factor and the resistivity simulation value.

[0088] According to an embodiment of the present disclosure, determining the resistivity of a concrete rod based on a size correction coefficient and a resistivity simulation value associated with a structural size of the concrete rod may include: determining the resistivity of the concrete rod based on the size correction coefficient, the reinforcement correction coefficient and the resistivity simulation value.

[0089] According to an embodiment of the present disclosure, the steel bar correction factor is determined from a plurality of simulated steel bar correction factors based on a target thickness, where the target thickness represents a distance from the steel bar to the first surface.

[0090] According to an embodiment of the present disclosure, the simulated steel bar correction coefficient and the simulated target thickness may be associated and stored in a steel bar correction coefficient query table. The steel bar correction coefficient k2 associated with the structural size of the concrete rod may be queried through the target thickness.

[0091] In one example, a reinforcement correction factor k2 associated with the structural size of the concrete rod may be queried based on the target thickness and the electrode spacing.

[0092] According to an embodiment of the present disclosure, the resistivity ρ of a reinforced concrete rod including steel bars is t It can be determined based on the following formula (9).

[0093] (9).

[0094] According to an embodiment of the present disclosure, the simulated steel bar correction coefficient is determined based on the following operations:

[0095] For the second simulated rod, determine the simulation target ratio between the simulation target thickness from the simulated steel bar to the simulation surface of the simulated rod and the preset simulation electrode spacing; determine the second simulation target potential difference of the second simulated rod under the condition of receiving the simulation current; process the second simulation target potential difference based on the resistivity simulation function to obtain a second simulated resistivity simulation value; and determine the simulated steel bar correction coefficient corresponding to the simulation target ratio based on the ratio between the preset reference resistivity and the second simulated resistivity simulation value.

[0096] According to an embodiment of the present disclosure, the second simulated rod may be a simulated concrete rod including simulated steel bars, and the simulated electrode spacing corresponds to the electrode spacing. The simulated target ratio may be expressed as Wherein, c represents the simulation target thickness. The second simulation target potential difference and the second target simulation potential difference second simulation resistivity simulation value can be determined based on formula (1). The ratio between the preset reference resistivity and the second simulation resistivity simulation value can obtain the simulation steel bar correction coefficient corresponding to the simulation target ratio.

[0097] According to an embodiment of the present disclosure, the reinforcement correction coefficient is determined based on the following operations:

[0098] For the second simulated rod, determine the simulation target ratio between the simulation target thickness of the simulated steel bar to the simulation surface of the simulated rod and the preset simulation electrode spacing, wherein the simulation surface corresponds to the first surface, the simulation electrode spacing corresponds to the electrode spacing, and the simulation electrode spacing is the same as the electrode spacing; determine the second simulation target potential difference of the second simulated rod under the condition of receiving the simulation current; process the second simulation target potential difference based on the resistivity simulation function to obtain a second simulation resistivity simulation value; determine the simulation steel bar correction coefficient corresponding to the simulation target ratio based on the ratio between the preset reference resistivity and the second simulation resistivity simulation value; for the same simulated steel bar, fit the initial coefficients of the variables in the initial equation based on multiple simulation steel bar correction coefficients related to the same simulation electrode spacing to obtain a target equation constructed based on the target coefficients.

[0099] According to an embodiment of the present disclosure, the target equation is associated with the simulated steel bar diameter of the same simulated steel bar, and the target equation is based on the ratio of the simulated electrode spacing s to the simulated target thickness c as a variable; the target thickness c and the electrode spacing s are processed based on the target equation corresponding to the steel bar diameter d of the concrete rod to obtain the steel bar correction coefficient.

[0100] According to an embodiment of the present disclosure, determining a second simulated target potential difference of the second simulated rod under the condition of receiving a simulated current; and processing the second simulated target potential difference based on a resistivity simulation function to obtain a second simulated resistivity simulation value may include determining a ratio to the simulated target based on formula (1): The corresponding second simulated resistivity simulated value ρ s . The preset reference resistivity and the second simulated resistivity simulation value ρ s A division operation is performed to obtain a simulated steel bar correction coefficient k2 corresponding to the same second simulated rod.

[0101] According to an embodiment of the present disclosure, for simulated steel bars of the same diameter, multiple simulated steel bar correction coefficients k2 associated with the same simulated electrode spacing s can be obtained, and the initial equation can be expressed as formula (10). For example, formula (10) can be understood as a steel bar correction coefficient fitting formula corresponding to any standard diameter of simulated steel bar. The steel bar correction coefficient fitting formula is a relationship between the steel bar correction coefficient k2 and the concrete cover thickness c and the electrode spacing s.

[0102] (10).

[0103] Formula (10): k2 is the steel bar correction coefficient, c is the simulation target thickness, s is the simulation electrode spacing, and A, B, and C are the initial coefficients of the initial equation. The initial coefficients A, B, and C of the variables in the initial equation are fitted to obtain the target equation constructed based on the target coefficients.

[0104] According to an embodiment of the present disclosure, determining a simulated target potential difference of a simulated rod under a condition of receiving a simulated current includes: based on the simulated current, solving a simulated potential difference using a control equation and boundary conditions, wherein the boundary condition is used to constrain the current density vector on the surface of the simulated rod to be zero, and the control equation is used to control the product of the gradient of the simulated target potential difference and the gradient of the simulated conductivity of the simulated rod to satisfy a preset balance condition with the product of the second-order gradient of the simulated target potential difference and the simulated conductivity; wherein the simulated target potential difference includes a second simulated target potential difference.

[0105] The specific process of determining the reinforcement simulation coefficient will be explained below in conjunction with Example 2.

[0106] Example 2

[0107] In the concrete finite element model with unidirectionally distributed steel bars, when analyzing different target thicknesses, the protective layer thickness (target thickness c) ranges from 20mm to 45mm. It can be found that with the increase in the thickness of the concrete protective layer, the resistivity value of the sample concrete bar gradually increases. In the process of c changing from 20mm to 45mm, the resistivity value gradually increases and approaches the reference value of 100Ω∙m, and the steel bar correction factor k2 decreases from 2.58 to 1.31. As the target thickness c gradually increases, the distance between the steel bar and the electrode increases, and the thicker the protective layer, the more evenly the current can be distributed, making the current pass through the concrete bar more evenly, which helps to avoid local current concentration. When the target thickness c=20mm, the current density of this section is mainly distributed inside the steel bar, and the current is mainly conducted through the steel bar. When the target thickness cc=45mm, the current density distribution range of this section is wider and more uniform, which can better reflect the true resistivity of concrete, and thus is closer to the reference value.

[0108] When analyzing different steel bar diameters, the steel bar diameter ranges from 8 mm to 30 mm. When the steel bar diameter d changes from 8 mm to 20 mm, the resistivity value gradually increases to 63.59 Ω∙m, and the correction coefficient From 2.24 to 1.57; when d is greater than 20mm, the resistivity value gradually decreases and the correction factor increases from 1.57 to 1.73.

[0109] The simulation in Example 2 proves that the target thickness c of the steel bar diameter and the concrete cover has a great influence on the resistivity measurement results, revealing the influence mechanism of the steel bar on the resistivity accuracy of the Wenner technology. This influence mechanism can be expressed as the steel bar correction coefficient k2 under the combined influence of different concrete cover thicknesses and steel bar diameters, which is particularly important. Because in actual engineering detection, the electrode spacing s is artificially adjustable, considering the influence of aggregate particle size and the influence of electrode spacing on the correction coefficient, it is recommended that the electrode spacing of the Wenner technology is preferably fixed to 40mm in reinforced concrete detection. Take the steel bar diameter d = 16mm, the protective layer thickness c = 20mm~40mm for correction coefficient verification, it can be found that the resistivity simulation calculation values ​​of reinforced concrete under different protective layer thicknesses are close to the reference value after secondary adjustment, the unadjusted average error is 41.48%, and the adjusted average error is 1.87%.

[0110] In one example, the electrode spacing is fixed at 40 mm, and the steel bar diameters commonly used in actual engineering applications are determined to be 8 mm, 12 mm, 16 mm, 20 mm, 25 mm, and 30 mm, respectively. Under different protective layer thicknesses (target thickness c), the target equation of the steel bar correction coefficient of the concrete bar considering the presence of steel bars can be based on the following Table 5. As shown in Table 1, , c is the target thickness in the concrete bar.

[0111] Table 5

[0112]

[0113] According to the embodiment of the present disclosure, when the simulated steel bar correction coefficient k2 and the target thickness c and steel bar diameter are obtained, the initial coefficients A, B and C of the initial equation can be fitted to obtain the specific target coefficient values ​​of A, B and C in the target equation under the conditions of each diameter d shown in Table 5. In this way, the steel bar correction coefficient k2 of the concrete rod can be calculated by obtaining the target thickness and steel bar diameter. The resistivity of the concrete rod is determined based on formulas (1) and (9).

[0114] According to the embodiments of the present disclosure, the measured resistivity simulation value can be corrected based on formulas (1) and (9) to achieve the resistivity measurement of the concrete rod in a non-destructive state.

[0115] According to the resistivity measuring device provided by the embodiment of the present disclosure, it is necessary to measure or know the target thickness c of the concrete cover, the steel bar diameter d of the concrete rod to be measured, and the electrode spacing s, so as to obtain the steel bar correction coefficient k2 and the size correction coefficient k1, and correct the resistivity simulation value based on formulas (1) and (9) to obtain a more accurate resistivity measurement result.

[0116] Example 3

[0117] In this embodiment, the size of the concrete rod can be 320mm×200mm×160mm, the electrode spacing s of the device is 40mm, the steel bar diameter d of the concrete rod is 16mm, and the target thickness c of the protective layer is 30mm. The processor module can calculate the resistivity simulation value to be 64.59Ω∙m. Since L / s, W / s, H / s=8:5:4, the size correction coefficient k1 is 0.895, the steel bar correction coefficient k2 is 1.70, and the corrected resistivity is 98.20Ω∙m. The deviation from the baseline value is reduced from the uncorrected 35.41% to 1.80%, indicating a good correction effect.

[0118] According to the device provided in the embodiment of the present disclosure, the resistivity simulation value is processed by using the steel bar correction coefficient and the size correction coefficient. The resistivity simulation value can be corrected by determining the steel bar correction coefficient corresponding to the target thickness and the electrode spacing. This can avoid the problem of reduced accuracy of the resistivity simulation value caused by the current always propagating along a path with smaller resistance to form current concentration due to the setting of the steel bars during the detection process.

[0119] Figure 2 The application scenario diagram of the resistivity measuring device for reinforced concrete rods according to one embodiment of the present disclosure is schematically shown.

[0120] like Figure 2 As shown, the concrete rod 220 may not include steel bars. The first surface 221 of the concrete rod 220 is arranged with a first electrode 211, a second electrode 212, a third electrode 213 and a fourth electrode 214 arranged in sequence. Among them, the first electrode 211 and the fourth electrode 214 are working electrodes, and the second electrode 212 and the third electrode 213 are intermediate electrodes. By obtaining the length L, width W and height H of the concrete rod 220, the size correction coefficient k1 can be determined. When the concrete rod 220 is measured by the resistance measuring device provided in the embodiment of the present disclosure, the resistivity ρ of the concrete rod 220 can be determined based on formulas (1) and (2): t .

[0121] Figure 3 A diagram schematically shows an application scenario of a resistivity measuring device for reinforced concrete rods according to another embodiment of the present disclosure.

[0122] like Figure 3As shown, the concrete rod 320 may include a steel bar 322. The first surface 321 of the concrete rod 320 is arranged with a 5th electrode 311, a 6th electrode 312, a 7th electrode 313 and an 8th electrode 314 arranged in sequence. Among them, the 5th electrode 311 and the 8th electrode 314 are working electrodes, and the 6th electrode 312 and the 7th electrode 313 are intermediate electrodes. By obtaining the length L, width W and height H of the concrete rod 320, the size correction coefficient k1 can be determined. The steel bar correction coefficient k2 can be determined based on the diameter of the steel bar 322 and the target thickness c. When the concrete rod 320 is measured by the resistance measuring device provided in the embodiment of the present disclosure, the 220 resistivity ρ of the concrete rod can be determined based on formulas (1) and (9). t .

[0123] According to an embodiment of the present disclosure, the arrangement direction of the plurality of electrodes is the same as the length direction of the steel bar. For example, the arrangement direction of the plurality of electrodes is the same as the length extension direction of the steel bar.

[0124] According to an embodiment of the present disclosure, the arrangement direction of the plurality of electrodes is perpendicular to the length direction of the steel bar. For example, the arrangement direction of the plurality of electrodes is perpendicular to the length extension direction of the steel bar.

[0125] In one example, the surface of the concrete rod to be tested needs to be smoothed before measurement. The reinforced concrete rod is provided with unidirectional single-layer steel bars. The axial direction of the steel bars in the reinforced concrete rod to be tested is regarded as the length direction of the rod, the arrangement direction of the unidirectional single-layer steel bars is regarded as the width direction of the reinforced concrete rod to be tested, and the direction perpendicular to the reinforced concrete surface where multiple electrodes are arranged is regarded as the height direction of the reinforced concrete rod to be tested. The reinforced concrete rod to be tested is a beam-column rod and its width does not meet the electrode installation conditions.

[0126] Another embodiment of the present disclosure also provides a resistivity measurement method for reinforced concrete rods, which is applied to the resistivity measurement device for reinforced concrete rods provided according to the embodiment of the present disclosure. The resistivity measurement method for reinforced concrete rods includes: processing the target potential difference and the current value of the detection current based on a resistivity simulation function to obtain a resistivity simulation value; determining the resistivity of the concrete rod based on a size correction coefficient associated with the structural size of the concrete rod and the resistivity simulation value, wherein the size correction coefficient is determined based on the sample resistivity corresponding to each of the simulated rods with different simulated structural sizes.

[0127] According to an embodiment of the present disclosure, a size correction coefficient is determined from a plurality of simulation size correction coefficients based on the structural size, and the simulation size correction coefficient is determined based on the following operations: determining a simulation size ratio relationship between a plurality of different first simulation structural sizes for a simulation rod in a simulation rod; determining a first simulation target potential difference of the first simulation rod under a condition of receiving a simulation current; processing the first simulation target potential difference based on a resistivity simulation function to obtain a first simulation resistivity simulation value; and determining a simulation size correction coefficient corresponding to the simulation size ratio relationship based on a ratio between a preset reference resistivity and the first simulation resistivity simulation value.

[0128] According to an embodiment of the present disclosure, the concrete rod is a reinforced concrete rod provided with steel bars, and the simulation rod includes a second simulation rod provided with simulated steel bars.

[0129] According to an embodiment of the present disclosure, determining the resistivity of a concrete rod based on a size correction coefficient and a resistivity simulation value associated with the structural size of the concrete rod includes: determining the resistivity of the concrete rod based on the size correction coefficient, the steel bar correction coefficient and the resistivity simulation value, wherein the steel bar correction coefficient is determined from a plurality of simulated steel bar correction coefficients based on a target thickness, and the target thickness characterizes the distance from the steel bar to the first surface.

[0130] According to an embodiment of the present disclosure, the simulated steel bar correction coefficient is determined based on the following operations:

[0131] For the second simulated rod, determine the simulation target ratio between the simulation target thickness of the simulated steel bar to the simulation surface of the simulated rod and the preset simulation electrode spacing, wherein the simulation surface corresponds to the first surface, and the simulation electrode spacing corresponds to the electrode spacing; determine the second simulation target potential difference of the second simulated rod under the condition of receiving the simulation current; process the second simulation target potential difference based on the resistivity simulation function to obtain a second simulated resistivity simulation value; and determine the simulated steel bar correction coefficient corresponding to the simulation target ratio based on the ratio between the preset reference resistivity and the second simulation resistivity simulation value.

[0132] According to an embodiment of the present disclosure, the concrete rod is a reinforced concrete rod provided with steel bars, and the simulation rod includes a second simulation rod provided with simulated steel bars.

[0133] According to an embodiment of the present disclosure, determining the resistivity of a concrete rod based on a size correction coefficient associated with a structural size of the concrete rod and a resistivity simulation value includes:

[0134] The resistivity of the concrete rod is determined based on the size correction factor, the steel bar correction factor and the resistivity simulation value, wherein the steel bar correction factor is determined based on the following operations: for the second simulated rod, determine the simulation target ratio between the simulation target thickness of the simulated steel bar to the simulation surface of the simulated rod and the preset simulation electrode spacing, wherein the simulation surface corresponds to the first surface, the simulation electrode spacing corresponds to the electrode spacing, and the simulation electrode spacing is the same as the electrode spacing; determine the second simulation target potential difference of the second simulated rod under the condition of receiving the simulation current; process the second simulation target potential difference based on the resistivity simulation function to obtain the second simulation resistivity simulation value. value; based on the ratio between a preset baseline resistivity and a second simulated resistivity simulation value, determine a simulated steel bar correction coefficient corresponding to the simulation target ratio; for the same simulated steel bar, based on multiple simulated steel bar correction coefficients related to the same simulated electrode spacing, fit the initial coefficients of the variables in the initial equation to obtain a target equation constructed based on the target coefficient, wherein the target equation is associated with the simulated steel bar diameter of the same simulated steel bar, and the target equation is based on the ratio of the simulated electrode spacing to the simulated target thickness as a variable; based on the target equation corresponding to the steel bar diameter of the concrete rod, process the target thickness and the electrode spacing to obtain the steel bar correction coefficient.

[0135] According to an embodiment of the present disclosure, determining a simulated target potential difference of a simulated rod under a condition of receiving a simulated current includes: based on the simulated current, solving a simulated potential difference using a control equation and boundary conditions, wherein the boundary condition is used to constrain a current density vector on the surface of the simulated rod to be zero, and the control equation is used to control the product of a gradient of the simulated target potential difference and a gradient of a simulated conductivity of the simulated rod to satisfy a preset balance condition with the product of a second-order gradient of the simulated target potential difference and the simulated conductivity; wherein the simulated rod includes a first simulated rod or a second simulated rod, and the simulated target potential difference includes a first simulated target potential difference or a second simulated target potential difference.

[0136] According to an embodiment of the present disclosure, the arrangement direction of the plurality of electrodes is the same as the length direction of the steel bar; or the arrangement direction of the plurality of electrodes is perpendicular to the length direction of the steel bar.

[0137] According to an embodiment of the present disclosure, processing the target potential difference and the current value of the detection current based on the resistivity simulation function to obtain the resistivity simulation value includes: determining the initial resistivity simulation value based on the ratio between the target potential difference and the current value of the detection current; and determining the resistivity simulation value based on the initial resistivity simulation value and the electrode spacing between two different electrodes.

[0138] It should be noted that the device and method provided in the embodiments of the present disclosure are proposed after the inventors discovered that the conventional resistivity measurement technology is based on the assumptions of semi-infinite materials, isotropy and homogeneous media. However, due to the significant difference in resistivity between concrete and steel bars, concrete containing steel bars no longer meets the assumptions of isotropy and homogeneous media. The current always flows through the path with the least resistance, resulting in uneven current field distribution and even current concentration. The presence of steel bars inside the concrete will cause deviations in the resistivity measurement results. By determining the steel bar correction coefficient based on the target thickness of the steel bar protective layer and the electrode spacing, accurate measurement of concrete rods containing steel bars can be achieved. The corrected true resistivity is calculated based on the size correction coefficient, the steel bar correction coefficient and the resistivity simulation value of the concrete rod, and the durability of reinforced concrete can be grasped in real time.

[0139] Figure 4 A block diagram of an electronic device suitable for implementing a resistivity measurement method for reinforced concrete rods according to an embodiment of the present disclosure is schematically shown. Figure 4 The electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0140] like Figure 4 As shown, the electronic device 400 according to an embodiment of the present disclosure includes a processor 401, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 402 or a program loaded from a storage part 408 to a random access memory (RAM) 403. The processor 401 may include, for example, a general-purpose microprocessor (e.g., a CPU), an instruction set processor and / or a related chipset and / or a dedicated microprocessor (e.g., an application-specific integrated circuit (ASIC)), etc. The processor 401 may also include an onboard memory for caching purposes. The processor 401 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present disclosure.

[0141] In RAM 403, various programs and data required for the operation of electronic device 400 are stored. Processor 401, ROM 402 and RAM 403 are connected to each other via bus 404. Processor 401 performs various operations of the method flow according to the embodiment of the present disclosure by executing the program in ROM 402 and / or RAM 403. It should be noted that the program can also be stored in one or more memories other than ROM 402 and RAM 403. Processor 401 can also perform various operations of the method flow according to the embodiment of the present disclosure by executing the program stored in the one or more memories.

[0142] According to an embodiment of the present disclosure, the electronic device 400 may further include an input / output (I / O) interface 405, which is also connected to the bus 404. The electronic device 400 may further include one or more of the following components connected to the input / output (I / O) interface 405: an input portion 406 including a keyboard, a mouse, etc.; an output portion 407 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage portion 408 including a hard disk, etc.; and a communication portion 409 including a network interface card such as a LAN card, a modem, etc. The communication portion 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to the input / output (I / O) interface 405 as needed. A removable medium 411, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 410 as needed, so that a computer program read therefrom is installed into the storage portion 408 as needed.

[0143] According to an embodiment of the present disclosure, the method flow according to an embodiment of the present disclosure can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable storage medium, and the computer program contains a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 409, and / or installed from the removable medium 411. When the computer program is executed by the processor 401, the above-mentioned functions defined in the system of the embodiment of the present disclosure are executed. According to an embodiment of the present disclosure, the system, equipment, device, module, unit, etc. described above can be implemented by a computer program module.

[0144] The present disclosure also provides a computer-readable storage medium, which may be included in the device / apparatus / system described in the above embodiments; or may exist independently without being assembled into the device / apparatus / system. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to the embodiment of the present disclosure is implemented.

[0145] According to an embodiment of the present disclosure, the computer-readable storage medium may be a non-volatile computer-readable storage medium. For example, it may include, but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, apparatus, or device.

[0146] For example, according to an embodiment of the present disclosure, the computer-readable storage medium may include the ROM 402 and / or the RAM 403 described above and / or one or more memories other than the ROM 402 and the RAM 403 .

[0147] The embodiments of the present disclosure also include a computer program product, which includes a computer program, which contains a program code for executing the method provided by the embodiments of the present disclosure. When the computer program product runs on an electronic device, the program code is used to enable the electronic device to implement the resistivity measurement method for reinforced concrete rods provided by the embodiments of the present disclosure.

[0148] When the computer program is executed by the processor 401, the above functions defined in the system / device of the embodiment of the present disclosure are executed. According to the embodiment of the present disclosure, the system, device, module, unit, etc. described above can be implemented by a computer program module.

[0149] In one embodiment, the computer program may rely on tangible storage media such as optical storage devices, magnetic storage devices, etc. In another embodiment, the computer program may also be transmitted and distributed in the form of signals on a network medium, and downloaded and installed through the communication part 409, and / or installed from the removable medium 411. The program code contained in the computer program may be transmitted using any appropriate network medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0150] According to an embodiment of the present disclosure, the program code for executing the computer program provided by the embodiment of the present disclosure can be written in any combination of one or more programming languages. Specifically, these computing programs can be implemented using high-level process and / or object-oriented programming languages, and / or assembly / machine languages. Programming languages ​​include, but are not limited to, Java, C++, python, "C" language or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, partially on the remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (for example, using an Internet service provider to connect through the Internet).

[0151] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram may represent a module, a program segment, or a part of a code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box may also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions. It can be understood by those skilled in the art that the features recorded in the various embodiments of the present disclosure can be combined and / or combined in a variety of ways, even if such a combination or combination is not explicitly recorded in the present disclosure. In particular, without departing from the spirit and teaching of the present disclosure, the features described in the various embodiments of the present disclosure may be combined and / or combined in a variety of ways. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0152] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A resistivity measuring device for reinforced concrete rods, comprising: A plurality of electrodes are arranged at equal intervals on the first surface of the concrete rod, including: at least two working electrodes, arranged at the head end and the tail end of the plurality of electrodes, the working electrodes being electrically connected to a power source; at least two intermediate electrodes arranged between the at least two working electrodes; a measuring device electrically connected to at least two of the intermediate electrodes, the measuring device being configured to measure a target potential difference between the at least two intermediate electrodes when the power supply provides a detection current to the at least two working electrodes; The processor module is configured to process the target potential difference and the current value of the detection current based on a resistivity simulation function to obtain a resistivity simulation value; determine the resistivity of the concrete rod based on a size correction coefficient associated with the structural size of the concrete rod and the resistivity simulation value, wherein the size correction coefficient is determined based on the sample resistivity corresponding to each of the simulated rods with different simulated structural sizes.

2. The device according to claim 1, wherein: The size correction factor is determined from a plurality of simulation size correction factors based on the structure size, and the simulation size correction factor is determined based on the following operations: For the simulated rods in the simulated rods, determining a simulated size ratio relationship between a plurality of different first simulated structure sizes; determining a first simulated target potential difference of the first simulated rod under a condition of receiving a simulated current; Processing the first simulated target potential difference based on the resistivity simulation function to obtain a first simulated resistivity simulation value; as well as Based on the ratio between a preset reference resistivity and the first simulated resistivity simulation value, a simulation size correction coefficient corresponding to the simulation size ratio relationship is determined.

3. The device according to claim 2, wherein: The concrete rod is a reinforced concrete rod provided with steel bars, and the simulation rod includes a second simulation rod provided with simulation steel bars; Wherein, the processor module is configured as follows: determining the resistivity of the concrete rod based on the size correction factor, the reinforcement correction factor and the resistivity simulation value, wherein the reinforcement correction factor is determined from a plurality of simulated reinforcement correction factors based on the target thickness, and the target thickness represents the distance from the reinforcement to the first surface; The simulated steel bar correction coefficient is determined based on the following operations: For the second simulated rod, determining a simulation target ratio between a simulation target thickness from the simulated steel bar to a simulation surface of the simulated rod and a preset simulation electrode spacing, wherein the simulation surface corresponds to the first surface, and the simulation electrode spacing corresponds to the electrode spacing; determining a second simulated target potential difference of the second simulated rod under a condition of receiving a simulated current; Processing the second simulated target potential difference based on the resistivity simulation function to obtain a second simulated resistivity simulation value; and Based on the ratio between a preset reference resistivity and the second simulated resistivity simulation value, a simulated steel bar correction coefficient corresponding to the simulation target ratio is determined.

4. The device according to claim 2, wherein: The concrete rod is a reinforced concrete rod provided with steel bars, and the simulation rod includes a second simulation rod provided with simulation steel bars; Wherein, determining the resistivity of the concrete rod based on a size correction coefficient associated with a structural size of the concrete rod and the resistivity simulation value comprises: The resistivity of the concrete rod is determined based on the size correction factor, the reinforcement correction factor and the resistivity simulation value, wherein the reinforcement correction factor is determined based on the following operations: For the second simulated rod, determining a simulation target ratio between a simulation target thickness from the simulated steel bar to a simulation surface of the simulated rod and a preset simulation electrode spacing, wherein the simulation surface corresponds to the first surface, the simulation electrode spacing corresponds to the electrode spacing, and the simulation electrode spacing is the same as the electrode spacing; determining a second simulated target potential difference of the second simulated rod under a condition of receiving a simulated current; Processing the second simulated target potential difference based on the resistivity simulation function to obtain a second simulated resistivity simulation value; Determining a simulated steel bar correction coefficient corresponding to the simulated target ratio based on a ratio between a preset reference resistivity and the second simulated resistivity simulation value; For the same simulated steel bar, based on a plurality of simulated steel bar correction coefficients associated with the same simulated electrode spacing, the initial coefficients of the variables in the initial equation are fitted to obtain a target equation constructed based on the target coefficients, wherein the target equation is associated with the simulated steel bar diameter of the same simulated steel bar, and the target equation is based on the ratio of the simulated electrode spacing to the simulated target thickness as a variable; The target thickness and the electrode spacing are processed based on a target equation corresponding to the steel bar diameter of the concrete rod to obtain the steel bar correction coefficient.

5. The device according to claim 2, wherein: Determining the simulated target potential difference of the simulated rod under the condition of receiving the simulated current includes: Based on the simulated current, a simulated potential difference is obtained by solving a control equation and a boundary condition, wherein the boundary condition is used to constrain the current density vector on the surface of the simulated rod to be zero, and the control equation is used to control the product of the gradient of the simulated target potential difference and the gradient of the simulated conductivity of the simulated rod to satisfy a preset balance condition with the product of the second-order gradient of the simulated target potential difference and the simulated conductivity; Wherein, the simulation rod comprises a first simulation rod or a second simulation rod, and the simulation target potential difference comprises a first simulation target potential difference or a second simulation target potential difference.

6. The device according to claim 1, wherein: The arrangement direction of the plurality of electrodes is the same as the length direction of the steel bar; or The arrangement direction of the plurality of electrodes is perpendicular to the length direction of the steel bar.

7. The device according to claim 1, wherein: The processor module is configured as follows: determining an initial resistivity simulation value based on a ratio between the target potential difference and the current value of the detection current; and The resistivity-simulated value is determined based on the initial resistivity-simulated value and an electrode distance between two different electrodes.

8. A method for measuring the resistivity of a reinforced concrete rod, applied to the device according to any one of claims 1 to 7, the method comprising: Processing the target potential difference and the current value of the detection current based on the resistivity simulation function to obtain a resistivity simulation value; The resistivity of the concrete rod is determined based on a size correction coefficient associated with the structural size of the concrete rod and the resistivity simulation value, wherein the size correction coefficient is determined based on sample resistivities corresponding to simulated rods of different simulated structural sizes.

9. An electronic device, comprising: one or more processors; a memory for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the method of claim 8.

10. A computer-readable storage medium having executable instructions stored thereon, which, when executed by a processor, enables the processor to implement the method of claim 8.

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