Method and device for determining diameter of reinforcing steel bar and thickness of concrete protective layer

Abstract

The invention discloses a method and device for determining the diameter of a steel bar and the thickness of a concrete protective layer, and the method is applied to the field of concrete detection, and comprises the steps: determining a target position according to a voltage value of a positioning coil under the condition that an excitation coil is electrified; when the target device is located at the target position and the position height of the target device is at a first preset height, a first voltage value of the current induction coil is obtained; when the target device is located at the target position and the position height of the target device is located at a second preset height, a second voltage value of the current induction coil is obtained; according to the first voltage value and the second voltage value, determining the steel bar diameter and the concrete protection layer thickness in the reinforced concrete. Through the method and the device, the problem that the detection efficiency is relatively low due to the fact that the diameter of the reinforcing steel bar in the concrete and the thickness of the protective layer cannot be detected simultaneously and can only be determined through further calculation when a traditional eddy current detection method is adopted to detect the reinforced concrete in related technologies is solved.

Description

Technical Field

[0001] The present application relates to the field of concrete detection, and in particular, to a method and device for determining a steel bar diameter and a concrete cover thickness. Background Art

[0002] Nondestructive testing technology has experienced significant development in the field of concrete testing and has gradually become an important tool for evaluating project quality. The application of this technology enables detailed information about the interior of concrete to be obtained without destroying the material structure, providing reliable data on key parameters such as its strength, density, and crack distribution. With the advancement of nondestructive testing technology, the detection accuracy and data processing capabilities have been greatly improved, making it more and more widely used in actual projects.

[0003] The existing eddy current detection method can be shown in the following steps: use a standard test block to calibrate the eddy current detection equipment, and select a suitable eddy current probe according to the material, shape, thickness and detection target of the workpiece to be tested; select a suitable eddy current detection frequency according to the material type and detection depth, where higher frequencies are usually used for surface defect detection and lower frequencies are used to detect deeper defects; use a handheld probe to manually move on the surface of the workpiece to ensure that the probe scans at a uniform speed and angle to avoid missed detection; during the detection process, observe the signal waveform on the display in real time, determine one of the variables of the steel bar diameter and the protective layer thickness in the concrete based on the signal waveform on the display, and then calculate or infer the other variable.

[0004] Traditional reinforced concrete detection methods cannot simultaneously determine the diameter of the steel bars in the concrete and the thickness of the protective layer. They can only infer one variable by determining another variable, and cannot determine the diameter of the steel bars in the concrete and the thickness of the protective layer more quickly.

[0005] When using traditional eddy current detection methods to detect reinforced concrete in related technologies, it is impossible to detect the diameter of the steel bars in the concrete and the thickness of the protective layer at the same time. They can only be determined through further calculations, resulting in low detection efficiency. No effective solution has been proposed yet. Summary of the invention

[0006] The main purpose of the present application is to provide a method and device for determining the diameter of steel bars and the thickness of concrete protective layer, so as to solve the problem that when the traditional eddy current detection method is used to detect reinforced concrete in the related technology, the diameter of the steel bars and the thickness of the protective layer in the concrete cannot be detected at the same time, and can only be determined through further calculation, resulting in low detection efficiency.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a target device is provided, which includes: an excitation coil, which is used to generate eddy currents in the steel bars inside the reinforced concrete when a constant current is turned on; N positioning coils, which are used to generate an induced voltage for each of the N positioning coils when the eddy currents are generated in the steel bars, and determine the target position based on the induced voltage detection of each positioning coil, wherein the target position is a position directly above the steel bars inside the reinforced concrete, and N is an integer greater than 1; an induction coil, which is used to adjust the height of the target device from the surface of the reinforced concrete when the target device is at the target position, and determine the diameter of the steel bars in the reinforced concrete and the thickness of the concrete cover based on the induced voltage of the induction coil at different heights; wherein the excitation coil is located at the periphery of the N positioning coils and the induction coil, and the positioning coil is located above the induction coil.

[0008] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a method for determining a steel bar diameter and a concrete protective layer thickness is provided, the determination method being applied to the above-mentioned target device, the target device at least comprising: an excitation coil, an induction coil, and a positioning coil, the method comprising: when the excitation coil is energized, obtaining a voltage value of the positioning coil, and determining a target position based on the voltage value of the positioning coil, wherein the target position is a position directly above the steel bar in the reinforced concrete; when the target device is at the target position and the position height of the target device is at a first preset height, obtaining a current first voltage value of the induction coil; when the target device is at the target position and the position height of the target device is at a second preset height, obtaining a current second voltage value of the induction coil, wherein the value of the second preset height is greater than the value of the first preset height; determining the steel bar diameter and the concrete protective layer thickness in the reinforced concrete based on the first voltage value and the second voltage value.

[0009] Furthermore, the steel bar diameter and the concrete protective layer thickness in the reinforced concrete are determined based on the first voltage value and the second voltage value, including: calculating the voltage difference between the first voltage value and the second voltage value; matching the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result; determining the steel bar diameter based on the matching result; adjusting the height of the target device from the reinforced concrete surface, and determining the concrete protective layer thickness in the reinforced concrete based on the voltage value of the induction coil in the target device.

[0010] Furthermore, before matching the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result, the method also includes: constructing a first simulation model of the target device and a second simulation model of the steel bar, wherein the second simulation model includes simulation models of steel bars with different diameters; placing the second simulation model directly below the first simulation model; adjusting the height of the first simulation model to obtain a fourth voltage value of the induction coil in the target device at each height; calculating the difference between the fourth voltage values ​​corresponding to each height, and constructing the voltage gradient table based on the difference between the fourth voltage values ​​corresponding to each height and the numerical value of the steel bar diameter.

[0011] Furthermore, the height of the target device from the reinforced concrete surface is adjusted, and the thickness of the concrete protective layer in the reinforced concrete is determined based on the voltage value of the induction coil in the target device, including: adjusting the height of the target device from the reinforced concrete surface between the first preset height and the second preset height until the third voltage value of the induction coil reaches the preset voltage value, and determining the current first height of the target device from the reinforced concrete surface; determining the second height between the target device and the steel bars in the reinforced concrete based on the preset voltage value and the voltage relationship table; and determining the thickness of the concrete protective layer based on the first height and the second height.

[0012] Furthermore, before adjusting the height of the target device from the reinforced concrete surface, the method also includes: determining a third simulation model corresponding to the steel bar diameter; adjusting the height of the third simulation model to obtain a fifth voltage value of the induction coil in the target device at each height; determining a numerical relationship between height and voltage based on the fifth voltage value of the induction coil in the target device at each height; and constructing a voltage relationship table based on the numerical relationship between height and voltage.

[0013] Furthermore, the number of the positioning coils is a preset number, the voltage value of the positioning coil is obtained, and the target position is determined based on the voltage value of the positioning coil, including: for each positioning coil in the preset number of positioning coils, a third voltage value of the positioning coil is obtained; the horizontal position of the target device is adjusted until it is detected that the third voltage value of each positioning coil is in a preset value range, and the target position is determined based on the current position of the target device.

[0014] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a device for determining a steel bar diameter and a concrete protective layer thickness is provided, the device comprising: a first acquisition unit, for acquiring a voltage value of the positioning coil when the excitation coil is energized, and determining a target position based on the voltage value of the positioning coil, wherein the target position is a position directly above the steel bar in the reinforced concrete; a second acquisition unit, for acquiring a first voltage value of the current induction coil when the target device is at the target position and the position height of the target device is at a first preset height; a third acquisition unit, for acquiring a second voltage value of the current induction coil when the target device is at the target position and the position height of the target device is at a second preset height, wherein the value of the second preset height is greater than the value of the first preset height; a determination unit, for determining the steel bar diameter and the concrete protective layer thickness in the reinforced concrete based on the first voltage value and the second voltage value.

[0015] Furthermore, the determination unit includes: a calculation subunit, used to calculate the voltage difference between the first voltage value and the second voltage value; a first matching subunit, used to match the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result; a second matching subunit, used to determine the steel bar diameter based on the matching result; a first determination subunit, used to adjust the height of the target device from the reinforced concrete surface, and determine the thickness of the concrete protective layer in the reinforced concrete based on the voltage value of the induction coil in the target device.

[0016] Furthermore, the determination unit also includes: a first construction subunit, used to construct a first simulation model of the target device and a second simulation model of the steel bar before matching the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result, wherein the second simulation model includes simulation models of steel bars with different diameters; a placement subunit, used to place the second simulation model directly below the first simulation model; a first acquisition subunit, used to adjust the height of the first simulation model to obtain the fourth voltage value of the induction coil in the target device at each height; and a second construction subunit, used to calculate the difference between the fourth voltage values ​​corresponding to each height, and construct the voltage gradient table based on the difference between the fourth voltage values ​​corresponding to each height and the numerical value of the steel bar diameter.

[0017] Furthermore, the determination subunit includes: a first determination module, used to adjust the height of the target device from the reinforced concrete surface between the first preset height and the second preset height until the third voltage value of the induction coil reaches the preset voltage value, and determine the current first height of the target device from the reinforced concrete surface; a second determination module, used to determine the second height between the target device and the steel bars in the reinforced concrete based on the preset voltage value and the voltage relationship table; a third determination module, used to determine the thickness of the concrete protective layer based on the first height and the second height.

[0018] Furthermore, the determination unit also includes: a second determination subunit, used to determine the third simulation model corresponding to the steel bar diameter before adjusting the height of the target device from the reinforced concrete surface; a second acquisition subunit, used to adjust the height of the third simulation model and obtain the fifth voltage value of the induction coil in the target device at each height; a third determination subunit, used to determine the numerical relationship between height and voltage based on the fifth voltage value of the induction coil in the target device at each height; and a third construction subunit, used to construct a voltage relationship table based on the numerical relationship between height and voltage.

[0019] Furthermore, the number of the positioning coils is a preset number, and the first acquisition unit includes: a third acquisition subunit, used to acquire the third voltage value of the positioning coil for each positioning coil in the preset number of positioning coils; an adjustment subunit, used to adjust the horizontal position of the target device until it is detected that the third voltage value of each positioning coil is in a preset value range, and the target position is determined based on the current position of the target device.

[0020] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a computer program product is provided, including a computer program, which, when executed by a processor, implements any of the above-mentioned methods for determining the steel bar diameter and the concrete cover thickness, and which, when executed by a processor, implements the steps of the method for determining the steel bar diameter and the concrete cover thickness described in each embodiment of the present application.

[0021] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes stored computer instructions, wherein when the computer instructions are executed by a processor, any one of the above-mentioned methods for determining the steel bar diameter and the concrete cover thickness is implemented.

[0022] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an electronic device is provided, including one or more processors and a memory, the memory being used to store one or more programs, wherein when the one or more programs are executed by one or more processors, the one or more processors implement any of the above-mentioned methods for determining the steel bar diameter and the concrete cover thickness.

[0023] Through the present application, the following steps are adopted: when the excitation coil is energized, the voltage value of the positioning coil is obtained, and the target position is determined based on the voltage value of the positioning coil, wherein the target position is the position directly above the steel bar in the reinforced concrete; when the target device is at the target position and the position height of the target device is at a first preset height, the first voltage value of the current induction coil is obtained; when the target device is at the target position and the position height of the target device is at a second preset height, the second voltage value of the current induction coil is obtained, wherein the value of the second preset height is greater than the value of the first preset height; the diameter of the steel bar in the reinforced concrete and the thickness of the concrete protective layer are determined based on the first voltage value and the second voltage value, which solves the problem in the related art that when the traditional eddy current detection method is used to detect reinforced concrete, the diameter of the steel bar in the concrete and the thickness of the protective layer cannot be detected at the same time, and can only be determined through further calculation, resulting in low detection efficiency. By designing a target device including an excitation coil, a positioning coil and an induction coil, and adjusting the position of the target device according to the induced voltage value induced by the positioning coil in the target device, the accuracy of the detection results of the steel bar diameter and the concrete protective layer thickness in reinforced concrete can be improved. At the same time, by lifting the target device to a first preset height and a second preset height from the reinforced concrete surface, the steel bar diameter and the concrete protective layer thickness in the reinforced concrete can be calculated according to the first voltage value and the second voltage value induced in the induction coil, thereby achieving the effect of improving the efficiency of the detection results of the steel bar diameter and the concrete protective layer thickness in reinforced concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 It is a flow chart of a method for determining the steel bar diameter and the concrete cover thickness provided in Example 1 of the present application;

[0026] Figure 2 Schematic diagram of an optional method for determining the steel bar diameter and the concrete cover thickness provided in Example 1 of the present application Figure 1 ;

[0027] Figure 3 Schematic diagram of an optional method for determining the steel bar diameter and the concrete cover thickness provided in Example 1 of the present application Figure 2 ;

[0028] Figure 4 Schematic diagram of an optional method for determining the steel bar diameter and the concrete cover thickness provided in Example 1 of the present application Figure 3 ;

[0029] Figure 5 Schematic diagram of an optional method for determining the steel bar diameter and the concrete cover thickness provided in Example 1 of the present application Figure 4 ;

[0030] Figure 6 Schematic diagram of an optional method for determining the steel bar diameter and the concrete cover thickness provided in Example 1 of the present application Figure 5 ;

[0031] Figure 7 Schematic diagram of an optional method for determining the steel bar diameter and the concrete cover thickness provided in Example 1 of the present application Figure 6 ;

[0032] Figure 8 is a schematic diagram of a device for determining a steel bar diameter and a concrete cover thickness according to the second embodiment of the present application;

[0033] Fig. 9 It is a schematic diagram of an electronic device for determining the diameter of steel bars and the thickness of concrete cover provided in Example 5 of the present application. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] It should be noted that the user information (including but not limited to user device information, user personal information, collected data, used data, generated data, processed data, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, collected information, used information, generated information, processed information, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, disclosure and application of relevant data are in compliance with the relevant laws, regulations and standards of relevant countries and regions, necessary confidentiality measures are taken, and public order and good morals are not violated, and corresponding operation portals are provided for users to choose to authorize or refuse. For example, an interface is set between this system and relevant users or organizations. Before obtaining relevant information, it is necessary to send an acquisition request to the aforementioned user or organization through the interface, and obtain relevant information after receiving the consent information fed back by the aforementioned user or organization.

[0036] It should be noted that this application provides users with corresponding operation entrances for them to choose to agree or reject the automated decision-making results; if the user chooses to reject, the expert decision-making process will be entered.

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] Embodiment 1

[0040] The present invention is described below in conjunction with preferred implementation steps. Figure 1 is a flow chart of a method for determining a steel bar diameter and a concrete cover thickness according to the first embodiment of the present application, such as Figure 1As shown, the determination method is applied to the above-mentioned target device, and the above-mentioned target device at least includes: an excitation coil, an induction coil, and a positioning coil. The method includes the following steps:

[0041] Step S101, when the excitation coil is energized, the voltage value of the positioning coil is obtained, and the target position is determined according to the voltage value of the positioning coil, wherein the target position is the position directly above the steel bars in the reinforced concrete.

[0042] Optionally, in the method for determining the steel bar diameter and the concrete protective layer thickness provided in Example 1 of the present application, the determination method is applied to the above-mentioned target device, and the above-mentioned target device includes: an excitation coil, which is used to generate eddy currents in the steel bars inside the reinforced concrete when a constant current is turned on; N positioning coils, which are used to generate an induced voltage for each of the N positioning coils when eddy currents are generated in the steel bars, and determine the target position based on the induced voltage detection of each positioning coil, wherein the target position is the position directly above the steel bars inside the reinforced concrete, and N is an integer greater than 1; an induction coil, which is used to adjust the height of the target device from the surface of the reinforced concrete when the target device is at the target position, and determine the steel bar diameter and the concrete protective layer thickness in the reinforced concrete based on the induced voltage of the induction coil at different heights; wherein the excitation coil is located outside the N positioning coils and the induction coil, and the positioning coil is located above the induction coil.

[0043] In the first embodiment, the target device is a detection coil array model based on the eddy current effect. The large coil at the outermost edge of the target device is the excitation coil, and the four horizontally placed circular coils are positioning coils to locate the target conductor to be measured (equivalent to the steel bars in reinforced concrete). The circular coil at the center of the target device is an induction coil, which is used to detect the thickness of the concrete cover in reinforced concrete and the diameter of the steel bars in reinforced concrete.

[0044] In an optional embodiment, the steel bar diameter and concrete cover thickness of reinforced concrete can be determined based on the eddy current effect and the lift-off effect. When the distance between the target device and the steel bar increases or decreases, the distribution and intensity of the eddy current will change, so that the induced voltage detected by the induction coil in the target device will also change accordingly. As the relative distance between the target device and the steel bar gradually increases, the eddy current density will gradually decrease, and the transient voltage induced on the induction coil will also change accordingly. When the diameter of the steel bar in the reinforced concrete is different, the magnitude of the induced voltage induced by the induction coil in the target device is also different. By using this connection, the corresponding relationship between the diameter of the steel bar and the magnitude of the induced voltage induced on the induction coil when the steel bar is at different lift-offs (vertical distance from the target device to the surface of the reinforced concrete) can be obtained, thereby determining the diameter of the steel bar in the reinforced concrete, and then determining the thickness of the concrete cover according to the magnitude of the induced voltage and the diameter of the steel bar.

[0045] The structural diagram of the target device can be as follows Figure 2 As shown, the outermost coil is the excitation coil, and the number of positioning coils is 4 (such as Figure 2 The positioning coils C1, C2, C3 and C4 are arranged symmetrically, and the remaining coils are induction coils. Figure 2 The specific parameters of each coil can be as follows Figure 3 As shown: the outer diameter R1 of the excitation coil is equal to 240mm, the inner diameter R2 is equal to 220mm, the height h is equal to 10mm, and the number of turns N is equal to 340; the outer radius r1 of the induction coil is equal to 80mm, the inner radius r2 is equal to 70, the height h1 is equal to 5mm, and the number of turns N is equal to 340; the outer radius a of each positioning coil is equal to 47mm, the inner diameter b is equal to 45mm, the height h2 is equal to 5mm, and the number of turns N is equal to 110.

[0046] Optionally, in the method for determining the steel bar diameter and the concrete cover thickness provided in Example 1 of the present application, the number of the above-mentioned positioning coils is a preset number, the voltage value of the positioning coil is obtained, and the target position is determined based on the voltage value of the positioning coil, including: for each positioning coil in the preset number of positioning coils, obtaining the third voltage value of the positioning coil; adjusting the horizontal position of the target device until it is detected that the third voltage value of each positioning coil is in a preset value range, and determining the target position based on the current position of the target device.

[0047] In the first embodiment, the number of the positioning coils in the target device may be 4, that is, the above-mentioned preset number is equal to 4. The 4 horizontally placed positioning coils in the target device are equal in size, and a constant current is passed through the coils.

[0048] In an optional embodiment, in order to improve the accuracy of the induced voltage detected by the target device, it is necessary to ensure that the steel bars in the reinforced concrete are located directly below the target device. Therefore, the placement of the target device can be adjusted according to the voltage detected by each positioning coil in the target device, thereby ensuring that the steel bars in the reinforced concrete are located directly below the target device.

[0049] Exemplarily, the excitation coil is energized, and after the excitation voltage is given, when the steel bar is offset to the exact center of the positioning coil, after the excitation voltage is given, the position of the steel bar in the reinforced concrete can be determined by observing the induced voltage value of each positioning coil in the four positioning coils. When the induced voltage of coils C3 and C4 is higher than that of coils C1 and C2, it is determined that the steel bar is located below coils C3 and C4, and the position of the target device should be moved to the left. When the induced voltage of coils C3 and C1 is higher than that of coils C4 and C2, it is determined that the steel bar is located below coils C3 and C1, and the position of the target device should be moved upward. When the induced voltage of coils 1 and C2 is higher than that of coils C3 and C4, it is determined that the steel bar is located below coils C1 and C2, and the position of the target device should be moved to the right. When the induced voltage of coils C2 and C4 is higher than that of coils C1 and C3, it is determined that the steel bar is located below coils C2 and C4, and the position of the target device should be moved downward. Therefore, the horizontal position of the target device can be continuously adjusted until the third voltage value of each positioning coil is within the preset value range (or the voltage difference between the third voltage values ​​of each positioning coil is within the preset value range), and the current position of the target device is determined as the target position.

[0050] Step S102: when the target device is at the target position and the height of the target device is at a first preset height, a first voltage value of the current induction coil is obtained.

[0051] In the first embodiment of the present invention, after placing the target device at the above-mentioned target position, in order to determine the diameter of the steel bars in the reinforced concrete, it is necessary to lift the target device to a height D1 from the surface of the reinforced concrete (i.e., the above-mentioned first preset height), and obtain the induced voltage value induced by the induction coil in the target device at this time, i.e., the above-mentioned first voltage value, so as to calculate the diameter of the steel bars in the reinforced concrete based on the first voltage value.

[0052] Step S103, when the target device is at the target position and the position height of the target device is at a second preset height, obtain the second voltage value of the current induction coil, wherein the value of the second preset height is greater than the value of the first preset height.

[0053] In the first embodiment, in order to determine the diameter of the steel bars in the reinforced concrete, it is necessary to set the horizontal position of the target device to the above-mentioned target position, and lift the target device to a height of D2 from the surface of the reinforced concrete (i.e., the above-mentioned second preset height), and obtain the induced voltage value induced by the induction coil in the target device at this time, i.e., the above-mentioned second voltage value, so as to calculate the diameter of the steel bars in the reinforced concrete based on the first voltage value and the second voltage value.

[0054] In an optional embodiment, the schematic diagram of two measurements of the target device can be as follows: Figure 4 As shown, the height D1 is the first preset height mentioned above, and the first voltage value V is measured when the target device is at the height D1. D1 , D2 height is the second preset height mentioned above, after measuring the first voltage value, lift the target device to D2 height to measure the second voltage value V D2 .

[0055] Step S104, determining the diameter of the steel bars and the thickness of the concrete cover in the reinforced concrete according to the first voltage value and the second voltage value.

[0056] In the first embodiment, in order to improve the efficiency of detecting the diameter of the steel bar and the thickness of the concrete cover in the reinforced concrete, it is necessary to calculate the first voltage value and the second voltage value, and calculate the induced voltage difference Δ between the height D1 and the height D2 of the target device. 梯度 , and then determine the steel bar diameter and concrete cover thickness based on the data in the voltage gradient table, where the voltage gradient table is a data table obtained after repeated tests based on the simulation model of the steel bar and the simulation model of the target device.

[0057] In summary, the method for determining the steel bar diameter and the concrete protective layer thickness provided in Example 1 of the present application obtains the voltage value of the positioning coil when the excitation coil is energized, and determines the target position based on the voltage value of the positioning coil, wherein the target position is the position directly above the steel bar in the reinforced concrete; when the target device is at the target position and the position height of the target device is at a first preset height, obtains the first voltage value of the current induction coil; when the target device is at the target position and the position height of the target device is at a second preset height, obtains the second voltage value of the current induction coil, wherein the value of the second preset height is greater than the value of the first preset height; determines the steel bar diameter and the concrete protective layer thickness in the reinforced concrete based on the first voltage value and the second voltage value, thereby solving the problem in the related art that when the traditional eddy current detection method is used to detect reinforced concrete, the steel bar diameter and the protective layer thickness in the concrete cannot be detected at the same time, and can only be determined through further calculation, resulting in low detection efficiency. By designing a target device including an excitation coil, a positioning coil and an induction coil, and adjusting the position of the target device according to the induced voltage value induced by the positioning coil in the target device, the accuracy of the detection results of the steel bar diameter and the concrete protective layer thickness in reinforced concrete can be improved. At the same time, by lifting the target device to a first preset height and a second preset height from the reinforced concrete surface, the steel bar diameter and the concrete protective layer thickness in the reinforced concrete can be calculated according to the first voltage value and the second voltage value induced in the induction coil, thereby achieving the effect of improving the efficiency of the detection results of the steel bar diameter and the concrete protective layer thickness in reinforced concrete.

[0058] Optionally, in the method for determining the steel bar diameter and the concrete protective layer thickness provided in Example 1 of the present application, the steel bar diameter and the concrete protective layer thickness in the reinforced concrete are determined based on the first voltage value and the second voltage value, including: calculating the voltage difference between the first voltage value and the second voltage value; matching the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result; determining the steel bar diameter based on the matching result; adjusting the height of the target device from the reinforced concrete surface, and determining the concrete protective layer thickness in the reinforced concrete based on the voltage value of the induction coil in the target device.

[0059] In the first embodiment, in order to determine the diameter of the steel bars and the thickness of the concrete protective layer in the reinforced concrete, the voltage gradient can be calculated, that is, the voltage difference between the first voltage value and the second voltage value is calculated, the voltage difference is matched with the voltage difference in the voltage gradient table, and the voltage gradient table is queried to see whether the steel bar diameter corresponding to the voltage difference exists, and the above-mentioned matching result is obtained. If the matching result is not empty, the steel bar diameter in the reinforced concrete is determined according to the steel bar diameter corresponding to the voltage difference in the voltage gradient table; if the matching result is empty, the height of the target device is adjusted and remeasured, the voltage difference between the first voltage value and the second voltage value is calculated again, and the corresponding steel bar diameter is searched in the voltage gradient table. After determining the steel bar diameter, the height of the target device from the surface of the reinforced concrete is adjusted until the voltage value of the induction coil in the target device reaches a preset value, thereby determining the thickness of the concrete protective layer in the reinforced concrete according to the current height of the target device from the surface of the reinforced concrete.

[0060] Optionally, in the method for determining the steel bar diameter and the concrete cover thickness provided in Example 1 of the present application, before matching the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result, the method further includes: constructing a first simulation model of the target device and a second simulation model of the steel bar, wherein the second simulation model includes simulation models of steel bars of different diameters; placing the second simulation model directly below the first simulation model; adjusting the height of the first simulation model to obtain a fourth voltage value of the induction coil in the target device at each height; calculating the difference between the fourth voltage values ​​corresponding to each height, and constructing a voltage gradient table based on the difference between the fourth voltage values ​​corresponding to each height and the numerical value of the steel bar diameter.

[0061] In the first embodiment, in order to measure the diameter of steel bars and the thickness of concrete cover in reinforced concrete, a simulation model of the steel bars and a simulation model of the target device can be established in advance, and the above-mentioned voltage gradient table can be calculated through the simulation model, so as to calculate the diameter of the steel bars based on the first voltage value and the second voltage value obtained by measurement.

[0062] In an optional embodiment, a first simulation model of the target device and second simulation models corresponding to different steel bar diameters may be constructed. For the second simulation model corresponding to each steel bar diameter, the positions of the first simulation model and the second simulation model are adjusted according to the voltage value of the positioning coil in the target device, and the first simulation model is placed above the second simulation model. Then, the height between the first simulation model and each second simulation model is adjusted, and the fourth voltage value of the induction coil in the target device at the first preset height and the second preset height is obtained respectively, and the voltage difference between the fourth voltage value corresponding to the first preset height and the fourth voltage value corresponding to the second preset height is calculated, and the above-mentioned voltage gradient table is constructed according to the voltage difference corresponding to the second simulation models with different steel bar diameters. A schematic diagram of a voltage gradient table can be as follows: Figure 5 As shown, Figure 5 The horizontal axis represents different steel bar diameters, and the vertical axis represents the voltage gradient, that is, the voltage difference mentioned above. Figure 5 The data points in the table represent the actual measured values. Figure 5 The straight line in represents the straight line fitted to the measured data points.

[0063] Optionally, in the method for determining the steel bar diameter and the concrete protective layer thickness provided in Example 1 of the present application, the height of the target device from the steel bar concrete surface is adjusted, and the thickness of the concrete protective layer in the steel bar concrete is determined based on the voltage value of the induction coil in the target device, including: adjusting the height of the target device from the steel bar concrete surface between a first preset height and a second preset height until the third voltage value of the induction coil reaches the preset voltage value, and determining the first height of the current target device from the steel bar concrete surface; determining the second height between the target device and the steel bar in the steel bar concrete based on the preset voltage value and the voltage relationship table; and determining the thickness of the concrete protective layer based on the first height and the second height.

[0064] In the first embodiment, in order to measure the thickness of the concrete protective layer in the reinforced concrete, it is necessary to adjust the height of the target device from the surface of the reinforced concrete again after determining the diameter of the steel bars in the reinforced concrete, so that the target device is located between the first preset height and the second preset height from the surface of the reinforced concrete. During the adjustment process, the thickness of the concrete protective layer in the reinforced concrete is determined based on the induced voltage value of the induction coil in the target device (i.e., the third voltage value mentioned above).

[0065] In an optional embodiment, the height of the target device from the reinforced concrete surface can be adjusted between the first preset height and the second preset height until the third voltage value of the induction coil reaches the preset voltage value. The preset voltage value is a measured voltage value in the voltage relationship table. When the third voltage value of the induction coil reaches the preset voltage value, the first height of the current target device from the reinforced concrete surface is determined, and the height corresponding to the preset voltage value (i.e., the second height between the target device and the steel bars in the reinforced concrete) is determined in the voltage relationship table according to the linear relationship between the voltage value and the distance between the target device and the steel bars, and the difference obtained by subtracting the first height from the second height is the above-mentioned concrete protective layer thickness.

[0066] For example, if the diameter of the steel bar is determined to be 10 mm according to the difference between the first voltage value corresponding to the first preset height and the second voltage value corresponding to the second preset height, the horizontal position of the target device is kept unchanged and the height of the target device is adjusted. If the induced voltage value of the induction coil is measured to be 2.1 V when the target device is 15 mm above the reinforced concrete surface, the induced voltage value of the induction coil is 1.9 V when the target device is 25 mm above the reinforced concrete surface. If when adjusting the target device, the induced voltage value of the induction coil in the target device is measured to be 2.0v (i.e., the above-mentioned preset voltage value), then it is determined that the distance between the target device and the steel bars in the reinforced concrete is 20mm (i.e., the above-mentioned first height), the second height between the current target device and the surface of the reinforced concrete is measured, and 20mm (i.e., the above-mentioned first height) is subtracted from the second height to obtain the thickness of the concrete protective layer in the reinforced concrete; if when adjusting the target device, the induced voltage value of the induction coil in the target device is measured to be 2.05v (i.e., the above-mentioned preset voltage value), then it is determined that the distance between the target device and the steel bars in the reinforced concrete is greater than 20mm, and according to 2.05v, it can be determined that the distance between the target device and the steel bars in the reinforced concrete is 22.5mm (i.e., the above-mentioned first height), the second height between the current target device and the surface of the reinforced concrete is measured, and 22.5mm (i.e., the above-mentioned first height) is subtracted from the second height to obtain the thickness of the concrete protective layer in the reinforced concrete.

[0067] Optionally, in the method for determining the steel bar diameter and the concrete cover thickness provided in Example 1 of the present application, before adjusting the height of the target device from the steel bar concrete surface, the method further includes: determining a third simulation model corresponding to the steel bar diameter; adjusting the height of the third simulation model to obtain a fifth voltage value of the induction coil in the target device at each height; determining a numerical relationship between height and voltage based on the fifth voltage value of the induction coil in the target device at each height; and constructing a voltage relationship table based on the numerical relationship between height and voltage.

[0068] Since the resistivity of concrete is about 2×10 2～7Omega, the resistivity of air is about 10 due to humidity. 4～13 Omega, while the resistivity of ordinary steel bars is about (1.5~10)×10 -8 Om. It can be seen that the eddy current effect in concrete is much smaller than the eddy current effect in steel bars and can be ignored, so air can be used to replace the eddy current effect of concrete. When the diameter of the steel bar is detected, the height of the target device from the steel bar in the reinforced concrete is determined by the induced voltage, and the thickness of the concrete cover in the reinforced concrete can be determined by subtracting the lifting height (i.e. the height of the target device from the surface of the reinforced concrete).

[0069] In the first embodiment, the voltage relationship table is obtained by adjusting the height between the target device and the steel bars of the target device, measuring the induced voltage value in the target device, and obtaining the relationship between the voltage value and the steel bars of different diameters. A schematic diagram of a voltage relationship table can be shown as follows: Figure 6 As shown, Figure 6 The horizontal axis represents the different heights between the steel bars of the target device, and the vertical axis represents the voltage value. Figure 6 The data points in the table represent the actual measured values. Figure 6 The straight line in represents the straight line fitted to the measured data points.

[0070] Optionally, in the first embodiment, the process of detecting the diameter of the steel bar and the thickness of the concrete cover in the reinforced concrete can be as follows: Figure 7 As shown. Set the excitation voltage and frequency parameters of the excitation coil in the target device; adjust the horizontal position of the target device according to the induced voltage value of each positioning coil in the target device, so that the induced voltage value of each positioning coil is within a preset range, so that the target device is located directly above the steel bar; then, lift the target device to a height of D1 from the reinforced concrete surface, and lift the target device to a height of D2 from the reinforced concrete surface; finally, calculate the voltage difference between the first voltage value at the height of D1 and the second voltage value at the height of D2, and determine the steel bar diameter and the thickness of the concrete cover in the reinforced concrete according to the voltage difference.

[0071] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0072] Embodiment 2

[0073] The second embodiment of the present application also provides a device for determining the diameter of a steel bar and the thickness of a concrete cover. It should be noted that the device for determining the diameter of a steel bar and the thickness of a concrete cover in the second embodiment of the present application can be used to execute the method for determining the diameter of a steel bar and the thickness of a concrete cover provided in the first embodiment of the present application. The device for determining the diameter of a steel bar and the thickness of a concrete cover provided in the second embodiment of the present application is introduced below.

[0074] Figure 8 Schematic diagram of a device for determining the steel bar diameter and the concrete cover thickness according to the second embodiment of the present application. Figure 8 As shown, the device includes: a first acquisition unit 801, a second acquisition unit 802, a third acquisition unit 803 and a determination unit 804.

[0075] Specifically, the first acquisition unit 801 is used to acquire the voltage value of the positioning coil when the excitation coil is energized, and determine the target position according to the voltage value of the positioning coil, wherein the target position is the position directly above the steel bars in the reinforced concrete.

[0076] The second acquisition unit 802 is used to acquire a first voltage value of the current induction coil when the target device is at a target position and the height of the target device is at a first preset height.

[0077] The third acquisition unit 803 is used to acquire the second voltage value of the current induction coil when the target device is at the target position and the position height of the target device is at a second preset height, wherein the value of the second preset height is greater than the value of the first preset height.

[0078] The determination unit 804 is used to determine the diameter of the steel bars and the thickness of the concrete cover in the reinforced concrete according to the first voltage value and the second voltage value.

[0079] The device for determining the steel bar diameter and the concrete protective layer thickness provided in the second embodiment of the present application, obtains the voltage value of the positioning coil by the first acquisition unit 801 when the excitation coil is energized, and determines the target position according to the voltage value of the positioning coil, wherein the target position is the position directly above the steel bar in the reinforced concrete; the second acquisition unit 802 obtains the first voltage value of the current induction coil when the target device is at the target position and the position height of the target device is at a first preset height; the third acquisition unit 803 obtains the second voltage value of the current induction coil when the target device is at the target position and the position height of the target device is at a second preset height, wherein the value of the second preset height is greater than the value of the first preset height; the determination unit 804 determines the steel bar diameter and the concrete protective layer thickness in the reinforced concrete according to the first voltage value and the second voltage value, thereby solving the problem in the related art that when the traditional eddy current detection method is used to detect reinforced concrete, the steel bar diameter and the protective layer thickness in the concrete cannot be detected at the same time, and can only be determined through further calculation, resulting in low detection efficiency. By designing a target device including an excitation coil, a positioning coil and an induction coil, and adjusting the position of the target device according to the induced voltage value induced by the positioning coil in the target device, the accuracy of the detection results of the steel bar diameter and the concrete protective layer thickness in reinforced concrete can be improved. At the same time, by lifting the target device to a first preset height and a second preset height from the reinforced concrete surface, the steel bar diameter and the concrete protective layer thickness in the reinforced concrete can be calculated according to the first voltage value and the second voltage value induced in the induction coil, thereby achieving the effect of improving the efficiency of the detection results of the steel bar diameter and the concrete protective layer thickness in reinforced concrete.

[0080] Optionally, in the device for determining the steel bar diameter and the concrete protective layer thickness provided in Example 2 of the present application, the above-mentioned determination unit 804 includes: a calculation subunit, used to calculate the voltage difference between the first voltage value and the second voltage value; a first matching subunit, used to match the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result; a second matching subunit, used to determine the steel bar diameter based on the matching result; and a first determination subunit, used to adjust the height of the target device from the surface of the reinforced concrete, and determine the thickness of the concrete protective layer in the reinforced concrete based on the voltage value of the induction coil in the target device.

[0081] Optionally, in the device for determining the steel bar diameter and the concrete cover thickness provided in Example 2 of the present application, the above-mentioned determination unit 804 also includes: a first construction subunit, used to construct a first simulation model of the target device and a second simulation model of the steel bar before matching the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result, wherein the second simulation model includes simulation models of steel bars with different diameters; a placement subunit, used to place the second simulation model directly below the first simulation model; a first acquisition subunit, used to adjust the height of the first simulation model and obtain the fourth voltage value of the induction coil in the target device at each height; and a second construction subunit, used to calculate the difference between the fourth voltage values ​​corresponding to each height, and construct a voltage gradient table based on the difference between the fourth voltage values ​​corresponding to each height and the numerical value of the steel bar diameter.

[0082] Optionally, in the device for determining the steel bar diameter and the concrete protective layer thickness provided in Example 2 of the present application, the above-mentioned determination subunit includes: a first determination module, used to adjust the height of the target device from the surface of the reinforced concrete between a first preset height and a second preset height, until the third voltage value of the induction coil reaches the preset voltage value, and determine the first height of the current target device from the surface of the reinforced concrete; a second determination module, used to determine the second height between the target device and the steel bars in the reinforced concrete based on the preset voltage value and the voltage relationship table; a third determination module, used to determine the thickness of the concrete protective layer based on the first height and the second height.

[0083] Optionally, in the device for determining the steel bar diameter and the concrete cover thickness provided in Example 2 of the present application, the above-mentioned determination unit 804 also includes: a second determination subunit, used to determine the third simulation model corresponding to the steel bar diameter before adjusting the height of the target device from the steel bar concrete surface; a second acquisition subunit, used to adjust the height of the third simulation model and obtain the fifth voltage value of the induction coil in the target device at each height; a third determination subunit, used to determine the numerical relationship between the height and the voltage based on the fifth voltage value of the induction coil in the target device at each height; and a third construction subunit, used to construct a voltage relationship table based on the numerical relationship between the height and the voltage.

[0084] Optionally, in the device for determining the steel bar diameter and the concrete cover thickness provided in Example 2 of the present application, the number of the above-mentioned positioning coils is a preset number, and the above-mentioned first acquisition unit 801 includes: a third acquisition subunit, used to obtain the third voltage value of the positioning coil for each positioning coil in the preset number of positioning coils; an adjustment subunit, used to adjust the horizontal position of the target device until it is detected that the third voltage value of each positioning coil is in a preset numerical range, and determine the target position based on the current position of the target device.

[0085] The device for determining the steel bar diameter and the concrete cover thickness includes a processor and a memory. The above-mentioned first acquisition unit 801, second acquisition unit 802, third acquisition unit 803 and determination unit 804 are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize corresponding functions.

[0086] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the detection efficiency of the diameter of the steel bar and the thickness of the protective layer in the reinforced concrete can be improved by adjusting the kernel parameters.

[0087] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0088] Embodiment 3 of the present invention provides a computer-readable storage medium having a program stored thereon, which implements a method for determining a steel bar diameter and a concrete cover thickness when the program is executed by a processor.

[0089] Embodiment 4 of the present invention provides a processor, which is used to run a program, wherein the method for determining the diameter of a steel bar and the thickness of a concrete cover is executed when the program is running.

[0090] like Fig. 9 As shown, embodiment 5 of the present invention provides an electronic device, the device includes a processor, a memory and a program stored in the memory and executable on the processor, and the processor implements the following steps when executing the program: when the excitation coil is energized, the voltage value of the positioning coil is obtained, and the target position is determined based on the voltage value of the positioning coil, wherein the target position is the position directly above the steel bars in the reinforced concrete; when the target device is at the target position and the position height of the target device is at a first preset height, the first voltage value of the current induction coil is obtained; when the target device is at the target position and the position height of the target device is at a second preset height, the second voltage value of the current induction coil is obtained, wherein the value of the second preset height is greater than the value of the first preset height; the diameter of the steel bars in the reinforced concrete and the thickness of the concrete protective layer are determined based on the first voltage value and the second voltage value.

[0091] When the processor executes the program, the following steps are also implemented: determining the diameter of the steel bars and the thickness of the concrete protective layer in the reinforced concrete based on the first voltage value and the second voltage value, including: calculating the voltage difference between the first voltage value and the second voltage value; matching the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result; determining the diameter of the steel bars based on the matching result; adjusting the height of the target device from the surface of the reinforced concrete, and determining the thickness of the concrete protective layer in the reinforced concrete based on the voltage value of the induction coil in the target device.

[0092] When the processor executes the program, the following steps are also implemented: before matching the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result, the method also includes: constructing a first simulation model of the target device and a second simulation model of the steel bar, wherein the second simulation model includes simulation models of steel bars with different diameters; placing the second simulation model directly below the first simulation model; adjusting the height of the first simulation model to obtain a fourth voltage value of the induction coil in the target device at each height; calculating the difference between the fourth voltage values ​​corresponding to each height, and constructing a voltage gradient table based on the difference between the fourth voltage values ​​corresponding to each height and the numerical value of the steel bar diameter.

[0093] When the processor executes the program, the following steps are also implemented: adjusting the height of the target device from the reinforced concrete surface, and determining the thickness of the concrete protective layer in the reinforced concrete based on the voltage value of the induction coil in the target device, including: adjusting the height of the target device from the reinforced concrete surface between a first preset height and a second preset height until the third voltage value of the induction coil reaches the preset voltage value, and determining the first height of the current target device from the reinforced concrete surface; determining the second height between the target device and the steel bars in the reinforced concrete based on the preset voltage value and the voltage relationship table; and determining the thickness of the concrete protective layer based on the first height and the second height.

[0094] When the processor executes the program, the following steps are also implemented: before adjusting the height of the target device from the reinforced concrete surface, the above method also includes: determining a third simulation model corresponding to the steel bar diameter; adjusting the height of the third simulation model to obtain the fifth voltage value of the induction coil in the target device at each height; determining the numerical relationship between the height and the voltage based on the fifth voltage value of the induction coil in the target device at each height; and constructing a voltage relationship table based on the numerical relationship between the height and the voltage.

[0095] When the processor executes the program, the following steps are also implemented: the number of the above-mentioned positioning coils is a preset number, the voltage value of the positioning coil is obtained, and the target position is determined based on the voltage value of the positioning coil, including: for each positioning coil in the preset number of positioning coils, the third voltage value of the positioning coil is obtained; the horizontal position of the target device is adjusted until it is detected that the third voltage value of each positioning coil is in a preset value range, and the target position is determined based on the current position of the target device.

[0096] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0097] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program that is initialized with the following method steps: when the excitation coil is energized, the voltage value of the positioning coil is obtained, and the target position is determined based on the voltage value of the positioning coil, wherein the target position is the position directly above the steel bars in the reinforced concrete; when the target device is at the target position and the position height of the target device is at a first preset height, the first voltage value of the current induction coil is obtained; when the target device is at the target position and the position height of the target device is at a second preset height, the second voltage value of the current induction coil is obtained, wherein the value of the second preset height is greater than the value of the first preset height; and the diameter of the steel bars in the reinforced concrete and the thickness of the concrete cover are determined based on the first voltage value and the second voltage value.

[0098] When executed on a data processing device, it is also suitable for executing an initialized program having the following method steps: determining the steel bar diameter and the concrete protective layer thickness in reinforced concrete based on a first voltage value and a second voltage value, including: calculating the voltage difference between the first voltage value and the second voltage value; matching the voltage difference with the voltage difference in a voltage gradient table to obtain a matching result; determining the steel bar diameter based on the matching result; adjusting the height of the target device from the reinforced concrete surface, and determining the concrete protective layer thickness in the reinforced concrete based on the voltage value of the induction coil in the target device.

[0099] When executed on a data processing device, it is also suitable for executing a program initialized with the following method steps: before matching the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result, the above method also includes: constructing a first simulation model of the target device and a second simulation model of the steel bar, wherein the second simulation model includes simulation models of steel bars with different diameters; placing the second simulation model directly below the first simulation model; adjusting the height of the first simulation model to obtain the fourth voltage value of the induction coil in the target device at each height; calculating the difference between the fourth voltage values ​​corresponding to each height, and constructing a voltage gradient table based on the difference between the fourth voltage values ​​corresponding to each height and the numerical value of the steel bar diameter.

[0100] When executed on a data processing device, it is also suitable for executing a program that is initialized with the following method steps: adjusting the height of the target device from the reinforced concrete surface, and determining the thickness of the concrete protective layer in the reinforced concrete based on the voltage value of the induction coil in the target device, including: adjusting the height of the target device from the reinforced concrete surface between a first preset height and a second preset height until the third voltage value of the induction coil reaches the preset voltage value, and determining the first height of the current target device from the reinforced concrete surface; determining the second height between the target device and the steel bars in the reinforced concrete based on the preset voltage value and the voltage relationship table; and determining the thickness of the concrete protective layer based on the first height and the second height.

[0101] When executed on a data processing device, it is also suitable for executing a program that is initialized with the following method steps: before adjusting the height of the target device from the reinforced concrete surface, the above method also includes: determining a third simulation model corresponding to the steel bar diameter; adjusting the height of the third simulation model to obtain the fifth voltage value of the induction coil in the target device at each height; determining the numerical relationship between the height and the voltage based on the fifth voltage value of the induction coil in the target device at each height; and constructing a voltage relationship table based on the numerical relationship between the height and the voltage.

[0102] When executed on a data processing device, it is also suitable for executing an initialization program having the following method steps: the number of the above-mentioned positioning coils is a preset number, the voltage value of the positioning coil is obtained, and the target position is determined based on the voltage value of the positioning coil, including: for each positioning coil in the preset number of positioning coils, the third voltage value of the positioning coil is obtained; the horizontal position of the target device is adjusted until it is detected that the third voltage value of each positioning coil is in a preset value range, and the target position is determined based on the current position of the target device.

[0103] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0104] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0105] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0106] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0107] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0108] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0109] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0110] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0111] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0112] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A target device, characterized in that: The target devices include: An exciting coil is used to generate eddy currents in the steel bars inside the reinforced concrete when a constant current is applied; N positioning coils, used to generate an induced voltage of each of the N positioning coils when an eddy current is generated in the steel bar, and determine a target position according to the induced voltage detection of each positioning coil, wherein the target position is a position directly above the steel bar inside the reinforced concrete, and N is an integer greater than 1; an induction coil, used to adjust the height of the target device from the reinforced concrete surface when the target device is at the target position, and determine the diameter of the steel bars and the thickness of the concrete cover in the reinforced concrete according to the induced voltage of the induction coil at different heights; The excitation coil is located outside the N positioning coils and the induction coil, and the positioning coil is located above the induction coil.

2. A method for determining the diameter of a steel bar and the thickness of a concrete cover, characterized in that: The determination method is applied to the target device according to claim 1, wherein the target device at least comprises: an excitation coil, an induction coil, and a positioning coil, and the determination method comprises: When the excitation coil is powered on, a voltage value of the positioning coil is obtained, and a target position is determined according to the voltage value of the positioning coil, wherein the target position is a position directly above the steel bars in the reinforced concrete; When the target device is at the target position and the height of the target device is at a first preset height, obtaining a first voltage value of the current induction coil; When the target device is at the target position and the height of the target device is at a second preset height, obtaining a second voltage value of the current induction coil, wherein the value of the second preset height is greater than the value of the first preset height; The diameter of the steel bars and the thickness of the concrete cover in the reinforced concrete are determined according to the first voltage value and the second voltage value.

3. The method according to claim 2, characterized in that Determining the diameter of steel bars and the thickness of a concrete cover in reinforced concrete according to the first voltage value and the second voltage value includes: calculating a voltage difference between the first voltage value and the second voltage value; Matching the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result; Determining the steel bar diameter according to the matching result; The height of the target device from the reinforced concrete surface is adjusted, and the thickness of the concrete protective layer in the reinforced concrete is determined according to the voltage value of the induction coil in the target device.

4. The method according to claim 3, characterized in that: Before matching the voltage difference with the voltage difference in the voltage gradient table to obtain a matching result, the method further includes: Constructing a first simulation model of the target device and a second simulation model of steel bars, wherein the second simulation model includes simulation models of steel bars with different diameters; placing the second simulation model directly below the first simulation model; Adjusting the height of the first simulation model to obtain a fourth voltage value of the induction coil in the target device at each height; The difference between the fourth voltage values ​​corresponding to each height is calculated, and the voltage gradient table is constructed according to the difference between the fourth voltage values ​​corresponding to each height and the value of the steel bar diameter.

5. The method according to claim 3, characterized in that: The height of the target device from the reinforced concrete surface is adjusted, and the thickness of the concrete protective layer in the reinforced concrete is determined according to the voltage value of the induction coil in the target device, including: Adjusting the height of the target device from the reinforced concrete surface between the first preset height and the second preset height until the third voltage value of the induction coil reaches the preset voltage value, and determining the current first height of the target device from the reinforced concrete surface; Determining a second height between the target device and the steel bars in the reinforced concrete according to the preset voltage value and the voltage relationship table; The thickness of the concrete cover is determined according to the first height and the second height.

6. The method according to claim 3, characterized in that: Before adjusting the height of the target device from the reinforced concrete surface, the method further includes: Determine a third simulation model corresponding to the steel bar diameter; Adjusting the height of the third simulation model to obtain a fifth voltage value of the induction coil in the target device at each height; Determining a numerical relationship between height and voltage according to a fifth voltage value of the induction coil in the target device at each height; A voltage relationship table is constructed according to the numerical relationship between the height and the voltage.

7. The method according to claim 2, characterized in that: The number of the positioning coils is a preset number, the voltage values ​​of the positioning coils are obtained, and the target position is determined according to the voltage values ​​of the positioning coils, including: For each positioning coil of the preset number of positioning coils, obtaining a third voltage value of the positioning coil; The horizontal position of the target device is adjusted until it is detected that the third voltage value of each positioning coil is within a preset value range, and the target position is determined according to the current position of the target device.

8. A device for determining the diameter of a steel bar and the thickness of a concrete cover, characterized in that: include: a first acquisition unit, configured to acquire a voltage value of the positioning coil when the excitation coil is powered on, and determine a target position according to the voltage value of the positioning coil, wherein the target position is a position directly above a steel bar in reinforced concrete; A second acquisition unit, configured to acquire a current first voltage value of the induction coil when the target device is at the target position and the height of the target device is at a first preset height; a third acquisition unit, configured to acquire a second voltage value of the current induction coil when the target device is at the target position and the position height of the target device is at a second preset height, wherein the value of the second preset height is greater than the value of the first preset height; A determination unit is used to determine the diameter of steel bars and the thickness of a concrete cover in reinforced concrete according to the first voltage value and the second voltage value.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes stored computer instructions, wherein when the computer instructions are executed by a processor, the method for determining the steel bar diameter and the concrete cover thickness according to any one of claims 2 to 7 is implemented.

10. An electronic device, characterized in that: The method comprises one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the method for determining the steel bar diameter and the concrete cover thickness as described in any one of claims 2 to 7.

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