Method and system for nondestructive testing of concrete beam and column corner steel bar diameter based on X-ray

Abstract

The invention discloses a method and a system for nondestructive testing of the diameter of a corner reinforcing steel bar of a concrete beam or column based on X-rays, X-rays emitted by a ray source enter from one side surface of the concrete beam or column and penetrate out from the other adjacent side surface, so that the X-rays penetrate through the corner reinforcing steel bar of the concrete beam or column to be tested; imaging the X rays on a digital board on the emergent side surface of the concrete beam or column to be measured to obtain the image length of the corner reinforcing steel bar; detecting the distances from the center of the concrete beam or column corner reinforcing steel bar to the X-ray incident side surface and the X-ray emergent side surface respectively; and measuring the positioning size of the radiation source, and calculating the diameter of the reinforcing steel bar in combination with the step S2 and the step S3. On the premise that a decorative surface is not damaged, detection of two steel bars at the beam corner and three steel bars at the column corner can be achieved, and accurate detection of the diameters of the steel bars in concrete beams and column components with the section larger than 500 mm through X rays is achieved by adopting a corner incidence detection mode.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building wall detection, and particularly relates to a method and system for nondestructive detection of diameters of corner steel bars in concrete beams and columns based on X-rays. BACKGROUND

[0002] Detection of diameters of steel bars is an important content of building structure detection and identification. According to the current standards, i.e., Technical Standard for On-site Detection of Concrete Structures GB / T 50784-2015 and Technical Standard for Detection of Steel Bars in Concrete JGJ / T 152-2019, the diameters of steel bars in building structures are detected by direct chiseling and caliper measurement, which is time-consuming and laborious. For roof beams, columns with thermal insulation and waterproof layers on the top, or columns with high-level decoration on the surface, the surface layer cannot be damaged during detection, so it is difficult to implement detection of the diameters of steel bars.

[0003] X-rays can be used for detection of diameters of steel bars in concrete structures, which has the characteristics of simple operation, high accuracy and efficiency, real-time imaging, and intuitive effect, and does not need to damage the surface high-level decoration and waterproof layer of the component, thereby realizing true nondestructive detection and having a wide application prospect in the field of building structure detection.

[0004] The effective penetration thickness of X-rays for concrete is about 300 mm, and the cross section of beam and column components is relatively large (generally greater than 500 mm), so the diameters of steel bars in the components cannot be directly detected. The number, position and thickness of the protective layer of the steel bars in the top and bottom of the concrete beam and the periphery of the concrete column can be accurately detected by using the existing magnetic sensor, and the error is not greater than 1 mm, which can fully guarantee the detection accuracy. SUMMARY

[0005] In order to solve the problem of accurate detection of diameters of steel bars in concrete beam and column components with a cross section greater than 500 mm, and realize nondestructive detection of diameters of steel bars in the concrete beam and column components without damaging the decoration layer or waterproof layer, the application provides a method and system for nondestructive detection of diameters of corner steel bars in concrete beams and columns based on X-rays.

[0006] The application adopts the following technical scheme:

[0007] In one aspect, the application provides a method for nondestructive detection of diameters of corner steel bars in concrete beams and columns based on X-rays, which comprises the following steps:

[0008] S1, X-rays emitted by a ray source enter from one side of a concrete beam or column and pass out from the other adjacent side, so that the X-rays penetrate the corner steel bars of the concrete beam or column to be detected;

[0009] S2, the X-rays are imaged on a digital plate at the exit side of the concrete beam or column to be detected, so as to obtain the image length of the corner steel bars;

[0010] S3, detecting the distance from the center of the corner reinforcement of the concrete beam or column to the X-ray incident side and the X-ray emission side respectively;

[0011] S4, measuring the positioning size of the ray source, combining step S2 and step S3, calculating the diameter of the reinforcement.

[0012] Preferably, the ray source is a ray machine.

[0013] Preferably, the step S3 adopts a radar instrument or a magnetic sensor for detection.

[0014] Further, the diameter of the reinforcement is obtained by the following algorithm:

[0015] Wherein: d- reinforcement diameter;

[0016] c- reinforcement image length;

[0017] a- the distance from the center of the reinforcement to the ray source in the direction parallel to the incident side;

[0018] a1- the distance from the center of the corner reinforcement to the emission side;

[0019] α is the emission angle of the ray source.

[0020] In another aspect, the present application also provides a system for non-destructive testing of the diameter of the corner reinforcement of a concrete beam or column based on X-ray, which comprises a ray source, a digital plate and a detector, the ray source is located on one side of the concrete beam or column to be tested, and the digital plate is attached to the other adjacent side of the concrete beam or column to be tested; the X-ray generated by the ray source is incident from one side of the concrete beam or column to be tested and emitted from the other adjacent side, and forms a reinforcement image on the digital plate, and the detector is used to detect the distance from the center of the corner reinforcement of the concrete beam or column to the X-ray incident side and the X-ray emission side respectively; according to the positioning size of the ray source, the length of the reinforcement image and the size of the distance from the incident side and the emission side, the diameter of the reinforcement is calculated.

[0021] Preferably, the detector is a radar instrument or a magnetic sensor for detection.

[0022] Further, the system further comprises a collection module and a calculation module, the calculation module is embedded with a reinforcement diameter algorithm, the collection module collects the length data of the reinforcement image, the size of the distance from the center of the reinforcement to the incident side and the emission side, and the positioning size of the ray source, and the diameter of the reinforcement is obtained after calculation by the calculation module, and the diameter of the corner reinforcement can be automatically calculated.

[0023] The technical scheme of the present application has the following advantages:

[0024] A.The present application can realize the detection of two steel bars in the corner of a beam and three steel bars in the corner of a column without damaging the decorative surface, and realizes the accurate detection of the diameter of the steel bars in the concrete beam and column members with a cross section greater than 500mm by using the corner incidence detection method.

[0025] B.The present application can realize the comprehensive detection of the steel bars in the beam and column by using the magnetic sensor or radar, and realizes the accurate measurement of the diameter of the steel bars by using the X-ray detection method without damaging the surface layer or the decoration layer, which greatly reduces the cost of chiseling and repairing.

[0026] C.The detection accuracy of the X-ray method is high, and the detection error of the diameter of the steel bars is not more than 0.4mm, which can meet the needs of structural detection and identification, and the detection time of each part is not more than 10min by using the X-ray method, which improves the efficiency by 3-4 times compared with the traditional chiseling inspection. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present application, the following will briefly introduce the drawings needed in the specific embodiments. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 The schematic diagram of the corner steel bar detection of the concrete beam or column provided by the present application is shown in the figure.

[0029] Figure 2 The method block diagram for nondestructive detection of the diameter of the corner steel bar of the concrete beam or column provided by the present application is shown in the figure.

[0030] The signs shown in the figure are as follows:

[0031] 1-concrete beam or column; 2-steel bar; 3-ray source; 4-digital plate; 5-incidence side

[0032] 6-emission side. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0034] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] like Figure 1 and Figure 2 As shown, this invention provides a method for non-destructive testing of the diameter of corner reinforcing bars in concrete beams and columns using X-rays. The system for non-destructive testing of corner reinforcing bar diameter includes: a radiation source 3, a digital plate 4, and a detector. The radiation source 3 is located on one side of the concrete beam or column 1 to be tested, and the digital plate 4 is attached to the other adjacent side of the concrete beam or column 1. X-rays generated by the radiation source 3 enter from one side of the concrete beam or column 1 and exit from the other adjacent side, forming an image of the reinforcing bar 2 on the digital plate 4. The detector is used to detect the distances from the center of the corner reinforcing bar 2 of the concrete beam or column 1 to the X-ray incident side 5 and the exiting side 6, respectively. Based on the positioning dimensions of the radiation source 3, combined with the length of the reinforcing bar 2 image and the dimensions of the distances from the incident side 5 and the exiting side 6, the diameter of the reinforcing bar 2 is calculated. The radiation source 3 used is a radiation machine, and the detector is a radar instrument or a magnetometer for detection.

[0037] The method used for non-destructive testing of the diameter of steel bars at the corners of concrete beams and columns includes the following steps:

[0038]

S1

[0039]

S2

[0040]

S3

[0041]

S4

[0042] The diameter of the reinforcing bar is obtained by the following algorithm: d = c / (a + a1)·a·cosα

[0043] Where: d - diameter of the reinforcing bar;

[0044] c - Length of the rebar image;

[0045] a - The distance from the ray source to the center of the reinforcing bar in a direction parallel to the incident side;

[0046] a1 - The distance from the center of the detected corner reinforcement to the side of the projectile;

[0047] b - The distance from the radiation source to the incident side of the concrete beam or column is measured by the detector;

[0048] b1 - The distance from the center of the reinforcing bar to the incident side detected by the detector;

[0049] α is the emission angle of the ray source, which can be calculated using the following formula:

[0050]

[0051] from Figure 1 As can be seen, a1 and b1 are the dimensions of the protective layer for the corner reinforcement. This invention eliminates the need for destructive treatment of the protective layer; by combining a detector, X-ray machine, and digital panel, the position and diameter of the corner reinforcement can be accurately measured. According to the system provided by this invention, the detection of two reinforcement bars at the beam corner and three reinforcement bars at the column corner can be achieved without damaging the decorative surface, making implementation more convenient.

[0052] To more conveniently and accurately calculate the diameter of the internal reinforcing bars, this invention also includes an acquisition module and a calculation module in the system. These modules can be installed on a mobile terminal or data processor. The calculation module embeds a reinforcing bar diameter algorithm, which can be combined with the aforementioned algorithm for calculation. Simultaneously, the distance from the X-ray source to the incident side of the concrete beam or column is measured by a detector, as is the distance from the center of the reinforcing bar to the incident side detected by the detector. The acquisition module collects data on the length of the reinforcing bar image, the distance from the center of the reinforcing bar to the incident and exit sides, and the position of the X-ray source. The calculation module then quickly calculates the diameter of the reinforcing bar.

[0053] Anything not mentioned above applies to existing technologies.

[0054] Obviously, the above embodiments are merely example for clearly illustrating but not limitation to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments need not and can not be enumerated. The obvious changes or variations derived from the above description are still within the protection scope of the present application.

Claims

1. A method for non-destructive testing of the diameter of the steel reinforcement in the corner of a concrete beam or column based on X-rays, characterized in that, It comprises the following steps: S1, X-rays emitted from the ray source enter from one side of the concrete beam or column and pass out from the other adjacent side, so that the X-rays penetrate the corner reinforcement of the concrete beam or column to be measured; S2, the X-rays are imaged on the digital plate at the exit side of the concrete beam or column to be measured, to obtain the image length of the corner reinforcement; S3, the distances from the center of the corner reinforcement to the X-ray incident side and the exit side are detected respectively; S4, the positioning size of the ray source is measured, and the diameter of the reinforcement is calculated in combination with steps S2 and S3.

2. The method of claim 1, wherein, The ray source is a ray machine.

3. The method of claim 1, wherein, In step S3, a radar instrument or a magnetic sensor is used for detection.

4. The method according to any one of claims 1 to 3, characterized in that, The diameter of the reinforcing bar is obtained by the following algorithm: Wherein: d-steel diameter; C-steel image length; A-the distance from the ray source to the center of the reinforcement in the direction parallel to the incident side; A1-the distance from the center of the corner reinforcement to the exit side detected; Alpha is the exit angle of the ray source.

5. A system for non-destructive testing of the diameter of steel reinforcement in the corner of a concrete beam or column based on X-rays, characterised in that, The system comprises a ray source, a digital plate and a detector, the ray source is located on one side of the concrete beam or column to be measured, and the digital plate is attached to the other adjacent side of the concrete beam or column to be measured; the X-rays generated by the ray source enter from one side of the concrete beam or column to be measured and exit from the other adjacent side, and form a steel image on the digital plate, and the detector is used to detect the distances from the center of the corner reinforcement of the concrete beam or column to the X-ray incident side and the exit side respectively; according to the positioning size of the ray source, in combination with the steel image length and the size of the distance from the incident side and the exit side, the steel diameter is calculated.

6. The system of claim 5, wherein, The detector is a radar instrument or a magnetic sensor for detection.

7. The system of claim 4, wherein, The system further comprises a collection module and a calculation module, the steel diameter algorithm is embedded in the calculation module, the collection module collects the steel image length data, the size of the distance from the center of the steel to the incident side and the exit side, and the position size of the ray source, and the steel diameter is obtained after calculation by the calculation module.

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