Bending strength detection equipment and method for reinforcing steel bars for constructional engineering

Abstract

The invention discloses bending strength detection equipment and method for reinforcing steel bars for constructional engineering, the bending strength detection equipment comprises a base, a jacking supporting piece, a pressure applying piece, a linear scanning shooting module and a controller, and the base is used for installing the jacking supporting piece, the pressure applying piece, the linear scanning shooting module and the controller; the two jacking supporting pieces are arranged in a collinear and spaced mode and used for conducting bridge type supporting and linear conveying on the reinforcing steel bars. The pressure applying piece is arranged to be located in the perpendicular bisector direction of the connecting line of the two jacking supporting pieces, is arranged opposite to the jacking supporting pieces and is used for quantitatively pressing the reinforcing steel bar; the line scanning shooting module is arranged to be located on a connecting line of the two jacking supporting pieces, is arranged right opposite to the pressure applying piece and is used for shooting the bent outer arc surface of the reinforcing steel bar; the controller is electrically connected with the pressure applying piece, the jacking supporting piece and the line scanning shooting module. According to the invention, continuous and overall detection and linear evaluation can be carried out on the reinforcing steel bar, the detection efficiency is improved, the detection result is more accurate, and the evaluation is more comprehensive and visual.

Description

Technical Field

[0001] The invention relates to a steel bar strength detection device and method, in particular to a steel bar bending strength detection device and method for construction engineering, belonging to the technical field of construction engineering. Background Art

[0002] As is known to all, steel bars are widely used in modern construction projects as the skeleton of reinforced concrete structures. Since the strength of steel bars plays a vital role in the quality of buildings, it is necessary to test the bending strength of steel bars at the construction site to strictly control the strength of steel bars.

[0003] At present, the bending strength testing technology for steel bars used in construction projects mainly utilizes a strength testing device to apply single-point pressure to the clamped steel bars. It is even necessary to first cut off the steel bar sample. The testing process can only detect and evaluate one point of the steel bar sample. There are problems such as poor representativeness of the test data, low accuracy of the test results, and low test efficiency.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the present invention provides a bending strength detection device and method for steel bars used in construction engineering, which can perform continuous and overall detection and linear evaluation of steel bars, improve detection efficiency, make detection results more accurate, and make evaluation more comprehensive and intuitive.

[0006] A bending strength detection device for steel bars for construction engineering according to the present invention comprises:

[0007] A base, which is used to install a jacking support, a pressure applying member, a line scanning shooting module and a controller;

[0008] A jacking support, wherein the jacking support is configured as two, collinear, and spaced apart, and is used for bridge support and linear transmission of steel bars;

[0009] A pressure applying member, which is arranged to be located in the direction of the perpendicular line of the connection line of the two jacking support members and is arranged opposite to the jacking support members, and is used to press the steel bars quantitatively;

[0010] A line scanning shooting module, which is configured to be located on the connecting line of the two jacking supports and arranged directly opposite to the pressure applying member, and is used to shoot the bent outer arc surface of the steel bar;

[0011] The controller is electrically connected to the pressure applying member, the lifting support member and the line scanning module, and is used to adjust the position of the steel bar and the pressure it is subjected to.

[0012] According to some embodiments of the present invention, each jacking support member includes a support frame, a transmission drive member and a support roller, the support roller is rotatably mounted on the top of the support frame and is used to support the steel bar, and the transmission drive member is mounted on the support frame and is used to drive the support roller to rotate;

[0013] The two support frames are also installed on the base through a support spacing adjustment member, and the support spacing adjustment member is used to drive the two support frames to perform relative linear sliding.

[0014] According to some embodiments of the present invention, the support spacing adjustment member includes a double-headed screw, a sliding frame and a sliding drive member. The double-headed screw is rotatably installed on the base and has two threaded portions with opposite rotation directions. The two sliding frames are respectively spirally connected to the two threaded portions. The two support frames are respectively fixedly installed on the two sliding frames. The sliding drive member is installed on the base and is transmission-connected to the double-headed screw.

[0015] According to some embodiments of the present invention, the support roller is configured as a columnar structure that is thin in the middle and thick at both ends, and the steel bars are arranged in a cross shape in the middle position of the columnar structure;

[0016] or the support roller is configured to be provided with a toothed surface for contacting the steel bar;

[0017] Alternatively, the support roller is configured to be provided with a matching pressure roller, and the pressure roller and the support roller are transmission-connected and used for clamping and conveying the steel bars.

[0018] According to some embodiments of the present invention, the pressure applying member includes a pressure driving member, a pressure sensing member and a pressure roller, the pressure driving member is mounted on a base, and the pressure roller is mounted on an output end of the pressure driving member through a buffer member; the pressure sensing member is arranged between the pressure roller and the pressure driving member, and is used to sense the pressing pressure of the pressure roller;

[0019] The pressure roller is configured as a columnar structure that is thin in the middle and thick at both ends, and / or a sliding guide is configured between the pressure roller and the base.

[0020] According to some embodiments of the present invention, the line scan shooting module includes a line scan camera and a fill light assembly; the line scan camera and the fill light assembly are both installed on a base and facing the curved outer arc surface of the steel bar, the line scan camera is used to collect real-time images of the curved outer arc surface of the steel bar being transmitted, and the fill light assembly is used to provide fill light to the shooting position.

[0021] According to some embodiments of the present invention, it also includes a bending correction member installed on the base; the bending correction member is configured to be located on the connecting line of the two lifting supports and on the outside of the lifting supports and downstream in the conveying direction, and is used to correct the curvature of the steel bars after detection of bending.

[0022] According to a method for detecting the bending strength of steel bars for construction engineering of the present invention, the bending strength detection device for steel bars for construction engineering is used for detection, and the detection method comprises the following steps:

[0023] S100, placing the steel bar to be tested on the jacking support, and controlling the pressure applying member to press downward through the controller so that the steel bar is bent and forms a curved outer arc surface;

[0024] S200, controlling the line scanning shooting module through the controller to shoot and collect the image of the curved outer arc surface of the steel bar, and controlling the lifting support to drive the steel bar to transmit along the axial direction, so as to obtain the detection image of the whole steel bar based on continuous shooting;

[0025] S300, establishing an overall evaluation value of the steel bar according to the overall inspection image analysis of the steel bar through the controller; judging whether the overall evaluation value is greater than a preset standard evaluation value, if yes, judging it as unqualified, if no, judging it as qualified.

[0026] According to some embodiments of the present invention, S300, establishing an overall evaluation value of the steel bar according to the detection image analysis by the controller, specifically includes:

[0027] S310, analyzing the detection image through the controller to obtain a detection length crack image, and constructing a detection length crack coordinate map;

[0028] S320, calculate the crack evaluation value Pi corresponding to each coordinate according to the following formula:

[0029] ,

[0030] Where i is the number of the crack, β 长 is the impact weight of the crack length, β 宽 is the impact weight of the crack width, l is the length of the crack, w is the width of the crack, and ε is the proportional magnification value;

[0031] S330, calculate the overall evaluation value P of the steel bar according to the following formula based on the crack evaluation value 总 ,

[0032] ,

[0033] Wherein L is the total scanning length of the line scanning shooting module of the steel bar, i is the number of the crack, and ɑ is the shrinkage ratio.

[0034] According to some embodiments of the present invention, the detection method further comprises: establishing a coordinate system with the crack evaluation value Pi and the axial length of the steel bar as the ordinate and the abscissa respectively, and obtaining an evaluation value curve according to the coordinate system;

[0035] The axial length of the steel bar is calculated according to the following formula

[0036] ,

[0037] ,

[0038] Where x0 is the axial length of the end of the steel bar beyond the lifting support, D is the distance between the two lifting supports, L is the scanning length of the line scanning module, ɑ is the shrinkage ratio, r is the axial bending radius of the steel, and d is the average cross-sectional radius of the steel bar.

[0039] According to a bending strength detection device and method for steel bars used in construction projects of the present invention, by setting a jacking support, a pressure applying member, a line scanning shooting module and a controller, the coordinated cooperation of the three is realized to realize multi-point continuous detection of the whole steel bar, and the steel bar can be automatically evaluated linearly and as a whole, instead of detecting a single point. Therefore, the evaluation is more comprehensive and intuitive, the detection is more accurate, and there is no need to sample and cut the steel bars. Therefore, the operation is convenient and quick, the detection efficiency is higher, the evaluation results are more representative, and the mechanical properties of the steel bar can be fully reflected.

[0040] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0042] Figure 1 It is a stereoscopic diagram of some embodiments of the bending strength detection equipment for steel bars used in construction engineering of the present invention.

[0043] Figure 2 The three-dimensional diagrams of some embodiments of the bending strength detection device for steel bars for construction engineering of the present invention after the outer shell is removed.

[0044] Figure 3 The front views of some embodiments of the bending strength detection device for steel bars for construction engineering of the present invention after the outer shell is removed.

[0045] Figure 4 The present invention is a flow chart of some embodiments of the method for detecting the bending strength of steel bars for construction engineering.

[0046] Meaning of reference numerals in the figure:

[0047] 100-Bending strength testing equipment;

[0048] 110-base; 111-bottom plate; 1111-universal wheel; 112-frame; 113-housing; 1131-observation window;

[0049] 120-lifting support member; 121-support frame; 122-transmission drive member; 123-support roller;

[0050] 130-pressure applying member; 131-pressure driving member; 132-pressure sensing member; 133-pressure roller; 134-sliding guide member; 1341-guide rod; 1342-guide plate;

[0051] 140-line scan shooting module; 141-line scan camera;

[0052] 150-controller;

[0053] 160-support spacing adjustment member; 161-double-ended screw rod; 162-sliding frame; 163-sliding driving member;

[0054] 170-bending correction member; 171-lifting driving member; 172-pressure correction roller; 173-support correction roller; 174-correction clamping roller;

[0055] 180-lifting member; 181-transmission roller; 182-axial rod;

[0056] 200-Rebar. DETAILED DESCRIPTION

[0057] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0058] Rebar bending strength testing technology in related construction engineering technologies, such as a known construction engineering steel bar strength testing device (CN110907288A) and a construction engineering steel bar bending strength testing device (CN217237568U), are all for specific segments of steel bars or steel bars after truncation and sampling. They first clamp and fix both ends of the steel bars, and then apply external force to the middle position to bend and deform the steel bars, thereby completing the strength test. Since the testing process is a single-point test and evaluation of fixed-length steel bars, there are problems such as poor representativeness of the test data, low accuracy of the test results, and low test efficiency.

[0059] In view of this, the embodiments of the present invention application aim to provide a bending strength detection device and method for steel bars for construction projects, which is used to perform linear and continuous detection of the bending strength of steel bars for construction projects, and can realize linear and overall evaluation of the steel bars, replacing the existing detection and analysis of one point, so that the evaluation of the mechanical properties of the steel bars is more comprehensive and intuitive, and the detection efficiency is improved, and the accuracy of the detection results is ensured, thereby solving the above-mentioned problems.

[0060] According to the following Figure 1-Figure 4 The bending strength detection device 100 and method of the steel bar 200 for construction engineering of the present invention are described in detail.

[0061] Please refer to Figure 1-3 The bending strength detection device 100 of a steel bar 200 for construction engineering provided by an embodiment of the present invention may include a base 110, a jacking support 120, a pressure applying member 130, a line scanning module 140 and a controller 150; wherein the base 110 is used to install the jacking support 120, the pressure applying member 130, the line scanning module 140 and the controller 150; the jacking support 120 is configured as two and arranged in a colinear and spaced manner, which is used to perform bridge support and linear transmission of the steel bar 200; the pressure applying member 130 is It is configured to be located in the direction of the perpendicular line of the line connecting the two lifting support members 120 and arranged opposite to the lifting support member 120, and is used to perform quantitative pressing on the steel bar 200; the line scanning shooting module 140 is configured to be located on the line connecting the two lifting support members 120 and is arranged directly opposite to the pressure applying member 130, and is used to shoot the bent outer arc surface of the steel bar 200; the controller 150 is electrically connected to the pressure applying member 130, the lifting support member 120 and the line scanning shooting module 140 respectively, and is used to adjust the position of the steel bar 200 and the pressure it is subjected to.

[0062] When in use, first, the controller 150 controls the pressure applying member 130 to press down and bend the steel bar 200 on the lifting support member 120 to form an outer arc surface that bends downward, and controls the pressure applying member 130 to stop when a specific pressure or bending arc is reached; then, the controller 150 controls the line scanning shooting module 140 to shoot the curved outer arc surface of the steel bar 200, and at the same time, the controller 150 controls the lifting support member 120 to drive the steel bar 200 axially, thereby obtaining an overall detection image of the steel bar 200; finally, the controller 150 analyzes the detection image and outputs the detection result of the bending strength of the steel bar 200.

[0063] In the embodiment of the present invention, the controller 150 can be installed on the base 110 through various forms of bracket connectors. For example, the controller 150 is fixed to the top of the base 110 through a cantilever bracket and is located in front of the base 110 to facilitate human-computer interaction. The detection and analysis process of the controller 150 can be to obtain a crack image of the detection length (i.e., the detection image of the entire steel bar 200), and construct a crack coordinate map of the detection length, and calculate the crack evaluation value P corresponding to each coordinate. i , and then the crack evaluation value P i According to the corresponding horizontal coordinates, the evaluation value curve is obtained by implanting them into the coordinate system; the overall evaluation value P of the steel bar 200 is obtained according to the crack evaluation value. 总 ; Determine the overall evaluation value P 总 Is it greater than a preset standard evaluation value P mark? If so, it is judged as unqualified; if not, it is judged as qualified.

[0064] The base 110 is used to form an installation foundation, and the base 110 can be a steel frame or a support plate structure, which is convenient for installing various components of the strength detection device for the construction engineering steel bar 200. In some possible implementations of the embodiment of the present invention, the base 110 can include a bottom plate 111, a frame 112 and a shell 113, the frame 112 is fixedly installed on the bottom plate 111, and the shell 113 is fixedly installed outside the frame 112 to form a box structure.

[0065] More specifically, a box skin may be installed on the periphery of the frame 112 by riveting, and the box skin and the frame 112 form a box structure, thereby protecting the detection steel bars 200 and ensuring the stability of the installation.

[0066] The bottom plate 111 forms a flat installation base. For example, the jacking support 120, the support spacing adjustment member 160 and the line scanning shooting module 140 are all fixedly installed on the bottom plate 111. The setting of the frame 112 facilitates the installation of various components inside the strength detection equipment of the steel bar 200 for construction engineering according to the required height and position. For example, the frame 112 can be a rectangular parallelepiped structure, and the pressure applying member 130 is fixedly installed on the frame 112, so that the support stability is high and can meet the stability required for detection.

[0067] In an embodiment of the present invention, the box structure may be provided with an observation window 1131 and universal wheels 1111. Exemplarily, an observation window 1131 may be provided on the outer shell 113, and the observation window 1131 may be provided as a transparent plate-like structure, which provides protection and facilitates observation of the operating conditions inside the box. Further preferably, the observation window 1131 may be a plexiglass plate that is rotatably connected to the outer shell 113 at the top, and opening the observation window 1131 facilitates maintenance and repair of the components inside the box. Exemplarily, universal wheels 1111 may be provided at the four bottom corners of the bottom plate 111, and the provision of the universal wheels 1111 facilitates the handling and movement of the steel bar 200 strength testing equipment for construction projects.

[0068] In some possible implementations of the embodiments of the present invention, each lifting support member 120 may include a support frame 121, a transmission drive member 122 and a support roller 123. The support roller 123 is rotatably installed on the top of the support frame 121 and is used to support the steel bar 200. The transmission drive member 122 is installed on the support frame 121 and is used to drive the support roller 123 to rotate; specifically, the rotation plane of the support roller 123 is perpendicular to the horizontal plane and coincides with the transmission line of the steel bar 200. The transmission drive member 122 is installed inside the support frame 121 and is transmission-connected to the support roller 123, thereby realizing the axial transmission of the steel bar 200 supported by the support roller 123.

[0069] More specifically, the transmission drive member 122 may include a motor, a conveyor belt, a driving pulley, and a driven pulley. The motor is mounted on the support frame 121, the output shaft of the motor is coaxially fixedly connected to the driving pulley, the support roller 123 is coaxially fixedly connected to the driven pulley, the driving pulley and the driven pulley are connected by a belt, and under the drive of the motor, the driving pulley drives the driven pulley to rotate, thereby rotating the support roller 123, thereby driving the steel bar 200 placed thereon to perform linear transmission, and of course, other structures may also be used, which will not be described in detail here.

[0070] The two lifting supports 120 may be arranged at a fixed spacing, and the fixed spacing is generally 10 cm-50 cm, and may of course be arranged at other values. Preferably, the lifting supports 120 may also be arranged movably. Exemplarily, in an embodiment of the present invention, the two support frames 121 are also mounted on the base 110 via a support spacing adjustment member 160, and the support spacing adjustment member 160 is used to drive the two support frames 121 to slide linearly relative to each other.

[0071] More specifically, the support frame 121 is vertically mounted on the base 110 via the support spacing adjustment member 160, the upper and lower parts of the support spacing adjustment member 160 can slide relative to each other, the support frame 121 is fixedly connected to the upper part of the support spacing adjustment member 160, and the lower part of the support spacing adjustment member 160 is fixedly connected to the bottom plate 111 of the base 110, thereby realizing the spacing adjustment of the two lifting support members 120 along the axial direction of the steel bar 200.

[0072] In some possible implementations of the embodiments of the present invention, the support spacing adjustment member 160 may include a double-headed screw 161, a sliding frame 162 and a sliding drive member 163. The double-headed screw 161 is rotatably mounted on the base 110 and has two threaded portions with opposite rotation directions. Obviously, the axis of the double-headed screw 161 is consistent with the sliding direction of the lifting support member 120. The two sliding frames 162 are respectively spirally connected to the two threaded portions. The two support frames 121 are respectively fixedly mounted on the two sliding frames 162. The sliding drive member 163 is installed on the base 110 and is transmission-connected to the double-headed screw 161.

[0073] The support spacing adjustment member 160 can be adjusted manually or electrically. For example, the double-headed screw 161 is driven by the sliding drive member 163, and then the sliding frame 162 is driven to slide relative to each other by the rotation of the double-headed screw 161, so that the distance between the two lifting support members 120 can be automatically adjusted. The sliding drive member 163 here can be a combination structure of a motor and a gear, of course, it can also be other combination structures, which will not be described in detail here.

[0074] In some possible implementations of the embodiments of the present invention, the support roller 123 can be configured as a columnar structure that is thin in the middle and thick at both ends, and the steel bars 200 are arranged in a cross shape in the middle position of the columnar structure; the designed columnar structure that is thin in the middle and thick at both ends can limit and support the transmitted steel bars 200, thereby avoiding the deviation of the steel bars 200 during the detection process and ensuring the smoothness and safety of the detection.

[0075] In order to increase the transmission stability of the lifting support member 120 , in some possible implementations of the embodiments of the present invention, the support roller 123 may be configured to have a toothed surface for contacting the steel bar 200 .

[0076] In some possible implementations of the embodiments of the present invention, the support roller 123 is configured to be provided with a matching pressure roller, and the pressure roller and the support roller 123 are transmission-connected and used to clamp and convey the steel bars 200 , thereby ensuring stable conveyance of the steel bars 200 .

[0077] In some possible implementations of the embodiments of the present invention, the pressure applying member 130 may include a pressure driving member 131, a pressure sensing member 132 and a pressure roller 133, the pressure driving member 131 is installed on the base 110, and the pressure roller 133 is installed on the output end of the pressure driving member 131 through a buffer member; the pressure sensing member 132 is arranged between the pressure roller 133 and the pressure driving member 131, and is used to sense the pressing pressure of the pressure roller 133.

[0078] In a specific implementation, the entire pressure applying member 130 can be set in the middle position between the two lifting supports 120, and the pressure roller 133 slides toward the direction of the lifting supports 120 under the action of the pressure driving member 131, and then contacts the steel bar 200 for quantitative pressing. More specifically, the pressure roller 133 can be a columnar structure with a thin middle and thick ends. The pressure roller 133 is installed on the inner top of the frame 112 and vertically downward. The pressure driving member 131 can be a hydraulic rod, an electric telescopic rod, etc. The fixed end of the pressure driving member 131 is connected to the frame 112, and its telescopic end fixes the pressure roller 133; the buffer member can be a spring combination structure, which is used to make the pressure applied by the pressure roller 133 stable and avoid excessive detection fluctuations caused by the ribs on the steel bar 200. When in use, the pressure roller 133 descends under the drive of the pressure driving member 131, and the pressure roller 133 descends to press the steel bars 200 placed on the lifting support member 120. When the pressure sensing member 132 senses that the pressing pressure of the pressure roller 133 reaches a preset pressure F, the pressure driving member 131 stops driving.

[0079] In some possible implementations of the embodiments of the present invention, the pressure roller 133 is configured as a columnar structure with a thin middle and thick ends, or a sliding guide 134 is configured between the pressure roller 133 and the base 110. The provision of the sliding guide 134 can increase the stability of the downward pressure of the support roller 123. More specifically, a guide rod 1341 is fixedly installed on the upper part of the pressure roller 133, and a guide plate 1342 is fixedly installed on the frame 112. The guide rod 1341 slides through the guide plate 1342, so that the downward pressure of the support roller 123 is stable and the drive is smooth.

[0080] In some possible implementations of the embodiments of the present invention, the line scan shooting module 140 may include a line scan camera 141 and a fill light component; the line scan camera 141 and the fill light component are both installed on the base 110 and facing the curved outer arc surface of the steel bar 200, the line scan camera 141 is used to collect the image of the curved outer arc surface of the steel bar 200 being transmitted in real time, and the fill light component is used to provide fill light to the shooting position.

[0081] In a specific implementation, the entire line scan shooting module 140 can also be set in the middle position between the two jacking supports 120, and arranged on both sides of the steel bar 200 facing the entire pressure applying member 130, so that the line scan camera 141 is in the bending direction of the steel bar 200, and can collect the image of the curved outer arc surface of the steel bar 200, and can capture the micro cracks caused by the bending, so as to improve the accuracy of the detection. In order to meet the shooting requirements, the fill light component is directed toward the shooting position for fill light irradiation. Exemplarily, the fill light component can be a horizontally arranged light strip or a circular light.

[0082] When in use, the shooting direction of the line scan camera 141 is opposite to the supporting direction of the lifting support member 120. When the pressure applying member 130 presses down on the steel bar 200 on the lifting support member 120, the steel bar 200 on the lifting support member 120 is pressed downward by the force, so that the steel bar 200 is bent, and the curved outer arc surface faces the line scan camera 141. The line scan camera 141 shoots the curved outer arc surface of the steel bar 200; under the drive of the lifting support member 120, the steel bar 200 is transmitted axially, so that the line scan camera 141 can shoot the overall curved surface of the steel bar 200 to obtain an overall detection image.

[0083] In some possible implementations of the embodiments of the present invention, the detection equipment may also include a bending correction piece 170 installed on the base 110; the bending correction piece 170 is configured to be located on the connecting line of the two lifting support members 120 and on the outside of the lifting support members 120 and downstream in the conveying direction. It is used to correct the curvature of the steel bar 200 after being bent, so as to avoid the bent steel bar 200 turning towards the box body and causing detection obstacles.

[0084] More specifically, the support correction roller 173 and the lifting drive 171 are installed in the frame 112 of the base 110 in opposite directions, and the driving direction of the lifting drive 171 is opposite to the supporting direction of the support correction roller 173. Exemplarily, the support correction roller 173 is installed at the bottom of the frame 112 through a column, the fixed end of the lifting drive 171 is installed at the top of the frame 112, and the output end of the lifting drive 171 is rotatably connected to the pressure correction roller 172 and the correction clamping roller 174 through a connecting frame, and the support correction roller 173 is located in the middle of the pressure correction roller 172 and the correction clamping roller 174. When in use, the bent steel bar 200 can be corrected into a small angle bend or a straight line through the clamping cooperation of the pressure correction roller 172, the correction clamping roller 174 and the support correction roller 173, thereby avoiding interference in the detection of the bent steel bar 200.

[0085] In some possible implementations of the embodiments of the present invention, a lifting member 180 may be further provided on the base 110, and the lifting member 180 is configured to be located on the line connecting the two lifting support members 120 and to be located outside the lifting support members 120 and upstream in the conveying direction. The setting of the lifting member 180 facilitates the steel bar 200 to enter the interior of the box structure for detection. Exemplarily, the lifting member 180 may include a transmission roller 181 and an axis rod 182, the axis rod 182 is fixedly connected to the outside of the housing 113, and the transmission roller 181 is rotatably set on the axis rod 182. When in use, one end of the steel bar 200 can be placed on the transmission roller 181, and then the steel bar 200 can be pushed into the box for detection, and the detection operation becomes easier.

[0086] Please refer to Figure 4 The embodiment of the present invention provides a method for detecting the bending strength of a steel bar 200 for construction engineering, using the above-mentioned bending strength detection device 100 for the steel bar 200 for construction engineering to perform detection. The detection method may include the following steps:

[0087] S100, placing the steel bar 200 to be inspected on the jacking support 120, and controlling the pressure applying member 130 to press downward by the controller 150 so that the steel bar 200 is bent and forms a curved outer arc surface;

[0088] In specific implementation, before placing the steel bars 200, the support spacing adjustment member 160 can also be controlled by the controller 150 to adjust the support spacing between the two lifting supports 120 to D; the specific adjustment distance can be obtained by pre-preparing a model-spacing information table in advance according to the models of each steel bar 200 through experience or detection standards, and the model-spacing information table can be searched through the steel bars 200 that need to be detected to obtain the spacing D between the two lifting supports 120. Of course, there are other methods of obtaining it, which will not be elaborated here.

[0089] S200, controlling the line scan shooting module 140 through the controller 150 to shoot and collect the image of the curved outer arc surface of the steel bar 200, and controlling the lifting support member 120 to drive the steel bar 200 to transmit along the axial direction, so as to obtain the overall detection image of the steel bar 200 based on continuous shooting;

[0090] After the pressure applying member 130 is started, the pressure F applied to the steel bar 200 is collected by the pressure sensing member 132; when the pressure F reaches a preset pressure threshold or the curved outer arc surface of the steel bar 200 reaches a preset bending arc threshold, the pressure applying member 130 is controlled to stop the downward driving. The preset pressure threshold and the preset bending arc threshold can be designed according to actual detection needs.

[0091] In summary, the combined process of step S100 and step S200 may be:

[0092] First, the steel bar 200 to be inspected is inserted into the inspection device and placed between the two lifting supports 120. Then, the pressure applying member 130 is controlled to press down and bend the steel bar 200 on the lifting supports 120 to form an outer arc surface that bends downward. When the pressure sensing member 132 senses that a preset pressure threshold or a preset bending arc threshold has been reached, the pressure applying member 130 is controlled to stop driving downward. Then, the lifting supports 120 are controlled to drive the steel bar 200 to transmit axially, and the line scanning shooting module 140 is controlled to linearly shoot the steel bar 200 to obtain an overall inspection image.

[0093] S300, establishing an overall evaluation value of the steel bar 200 according to the overall detection image analysis of the steel bar 200 through the controller 150; judging whether the overall evaluation value is greater than a preset standard evaluation value, if so, judging it as unqualified, if not, judging it as qualified.

[0094] The standard evaluation value P 标 The design can be performed according to the model and purpose of the steel bar 200, and the details will not be elaborated here.

[0095] In some possible implementations of the embodiments of the present invention, S300, establishing an overall evaluation value of the steel bar 200 by the controller 150 according to the detection image analysis, may specifically include:

[0096] S310. Analyze the detection image through the controller 150 to obtain the detection length crack image, and construct a detection length crack coordinate map; wherein, the detection image can be directly obtained by scanning with a line scan camera module, and the detection image and the recorded line scan length are bound to obtain the detection length crack image, and then the detection length crack image is inserted into the numerical axis according to the horizontal coordinate (this horizontal coordinate is the scanning length of the line scan camera module) to construct a detection length crack coordinate map for more intuitive display of detection data.

[0097] The detection length crack coordinate map can be a numerical axis whose horizontal axis is the axial length of the steel bar 200, that is, the detection image is implanted into the numerical axis to obtain the detection length crack coordinate map; the axial length can be the length from the detection end of the steel bar 200 to the detection point. The detection image obtained by the line scanning shooting module 140 is implanted into the horizontal axis according to the axial length to obtain the detection length crack coordinate map, which includes images with cracks and images without cracks. The image with cracks is implanted into the horizontal axis according to the original detection image, and the image without cracks can be implanted into the horizontal axis after the length of the detection image is contracted by the contraction ratio ɑ.

[0098] S320, calculate the crack evaluation value P corresponding to each coordinate according to the following formula i ,

[0099] ,

[0100] Where i is the number of the crack, β 长 is the impact weight of the crack length, β 宽 is the impact weight of the crack width, β 宽 The specific value of can be determined according to the influence of the damage value of the model and purpose of the steel bar 200, which is generally between 0.5-1; l is the length of the crack; w is the width of the crack, which can be the maximum value of the crack width; ε is the proportional magnification value, because the bending angle of the steel bar 200 cannot reach 90 degrees, the general angle is 20 degrees-75 degrees. Of course, if it is not evaluated by the standard of bending 90 degrees, then the value of the proportional magnification value ε at this time is 1.

[0101] S330, calculate the overall evaluation value P of the steel bar 200 according to the following formula based on the crack evaluation value 总 ,

[0102] ,

[0103] Wherein Ltotal is the total scanning length of the line scanning shooting module 140 of the steel bar 200, i is the number of the crack, and ɑ is the shrinkage ratio.

[0104] In some possible implementations of the embodiments of the present invention, the detection method may further include: establishing a coordinate system with the crack evaluation value Pi and the axial length of the steel bar 200 as the ordinate and the abscissa respectively, and obtaining an evaluation value curve according to the coordinate system;

[0105] The axial length of the steel bar is calculated according to the following formula

[0106] ,

[0107] ,

[0108] Wherein, x is the horizontal coordinate, x0 is the axial length of the end of the steel bar 200 beyond the lifting support 120, D is the distance between the two lifting supports 120, L is the scanning length of the line scan camera module 140, ɑ is the shrinkage ratio, r is the axial bending radius of the steel, and d is the average cross-sectional radius of the steel bar 200; therefore, based on the calculation formula of the above horizontal coordinate, the scanning length of the line scan camera module can be converted into the axial length of the steel bar, so as to facilitate targeted analysis.

[0109] The crack evaluation value obtained by calculation is implanted into the coordinate system according to the horizontal coordinate, and then each point is connected in sequence to obtain an evaluation value curve, where the horizontal coordinate of the coordinate system is the axial length of the steel bar 200, and the vertical coordinate is the crack evaluation value. The evaluation value curve can better and more intuitively observe the strength of the steel bar 200 and more intuitively evaluate each point of the steel bar 200.

[0110] The specific implementation process of step S300 of the bending strength detection method provided by the embodiment of the present invention based on the controller 150 can be as follows (in chronological order):

[0111] Analyze the captured overall detection image, obtain the detection length crack image, construct the detection length crack coordinate map, and calculate the crack evaluation value P corresponding to each coordinate i , obtain the evaluation value curve, and calculate the overall evaluation value P of the steel bar 200 总 , determine whether the overall evaluation value P is greater than a preset standard evaluation value P 标 If yes, it is judged as unqualified, if no, it is judged as qualified.

[0112] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0113] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0114] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0115] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications and equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A bending strength testing device for steel bars used in construction engineering, characterized in that: include: A base, the base is used to install a jacking support, a pressure applying member, a line scanning shooting module and a controller; A lifting support member, wherein the lifting support members are configured as two and arranged in a co-linear manner and at intervals, and are used for bridge-type support and linear transmission of steel bars; A pressure applying member, the pressure applying member is configured to be located in the direction of the perpendicular line of the connection line of the two lifting support members and arranged opposite to the lifting support members, and is used to quantitatively press the steel bar; A line scanning shooting module, the line scanning shooting module is configured to be located on the connecting line of the two jacking support members and arranged directly opposite to the pressure applying member, and is used to shoot the bent outer arc surface of the steel bar; A controller is electrically connected to the pressure applying member, the lifting support member and the line scanning module, and is used to adjust the position of the steel bar and the pressure it is subjected to.

2. The bending strength testing device for steel bars for construction engineering according to claim 1, characterized in that: Each of the lifting support members comprises a support frame, a transmission drive member and a support roller, wherein the support roller is rotatably mounted on the top of the support frame and is used to support the steel bars, and the transmission drive member is mounted on the support frame and is used to drive the support roller to rotate; The two support frames are also mounted on the base through the support spacing adjustment member, and the support spacing adjustment member is used to drive the two support frames to perform relative linear sliding.

3. The bending strength testing device for steel bars for construction engineering according to claim 2, characterized in that: The support spacing adjustment member includes a double-headed screw, a sliding frame and a sliding drive member. The double-headed screw is rotatably installed on the base and has two threaded parts with opposite rotation directions. The two sliding frames are respectively spirally connected to the two threaded parts. The two support frames are respectively fixedly installed on the two sliding frames. The sliding drive member is installed on the base and is transmission-connected to the double-headed screw.

4. The bending strength testing device for steel bars for construction engineering according to claim 3, characterized in that: The support roller is configured as a columnar structure that is thin in the middle and thick at both ends, and the steel bars are arranged in a cross shape in the middle position of the columnar structure; Or the support roller is configured to be provided with a toothed surface for contacting the steel bar; Alternatively, the support roller is configured to be provided with a matching pressure roller, and the pressure roller is transmission-connected with the support roller and is used to clamp and convey the steel bars.

5. The bending strength testing device for steel bars for construction engineering according to any one of claims 1 to 4, characterized in that: The pressure applying member includes a pressure driving member, a pressure sensing member and a pressure roller, wherein the pressure driving member is mounted on the base, and the pressure roller is mounted on the output end of the pressure driving member through a buffer member; the pressure sensing member is arranged between the pressure roller and the pressure driving member, and is used to sense the pressing pressure of the pressure roller; Wherein, the pressure roller is configured as a columnar structure which is thin in the middle and thick at both ends, and / or a sliding guide is configured between the pressure roller and the base.

6. The bending strength testing device for steel bars for construction engineering according to any one of claims 1 to 4, characterized in that: The line scan shooting module includes a line scan camera and a fill light component; the line scan camera and the fill light component are both installed on the base and facing the curved outer arc surface of the steel bar, the line scan camera is used to collect the image of the curved outer arc surface of the steel bar in transmission in real time, and the fill light component is used to provide fill light to the shooting position.

7. The bending strength testing device for steel bars for construction engineering according to any one of claims 1 to 4, characterized in that: It also includes a bending correction piece installed on the base; the bending correction piece is configured to be located on the connecting line of the two lifting supports and on the outside of the lifting supports and downstream in the transmission direction, and is used to correct the curvature of the steel bars after detection of bending.

8. A method for testing the bending strength of steel bars for construction engineering, characterized in that: The bending strength testing device for steel bars for construction engineering according to any one of claims 1 to 7 is used for testing, and the testing method comprises the following steps: S100, placing the steel bar to be tested on the jacking support, and controlling the pressure applying member to press downward by the controller so that the steel bar is bent and forms a curved outer arc surface; S200, controlling the line scanning shooting module to shoot and collect the image of the curved outer arc surface of the steel bar through the controller, and controlling the lifting support to drive the steel bar to transmit along the axial direction, so as to obtain the detection image of the whole steel bar based on continuous shooting; S300, establishing an overall evaluation value of the steel bar according to the overall inspection image analysis of the steel bar through the controller; judging whether the overall evaluation value is greater than a preset standard evaluation value, if yes, judging it as unqualified, if no, judging it as qualified.

9. The method for detecting the bending strength of steel bars for construction engineering according to claim 8, characterized in that: S300, establishing an overall evaluation value of the steel bar according to the detection image analysis by the controller, specifically comprising: S310, analyzing the detection image through the controller to obtain a detection length crack image, and constructing a detection length crack coordinate map; S320, calculate the crack evaluation value Pi corresponding to each coordinate according to the following formula: ， Where i is the number of the crack, β 长 is the impact weight of the crack length, β 宽 is the impact weight of the crack width, l is the length of the crack, w is the width of the crack, and ε is the proportional magnification value; S330, according to the crack evaluation value, calculate the overall evaluation value P of the steel bar according to the following formula: ， Where L 总 is the total scanning length of the line scanning shooting module of the steel bar, i is the number of the crack, and ɑ is the shrinkage ratio.

10. The method for detecting the bending strength of steel bars for construction engineering according to claim 9, characterized in that: Also includes: A coordinate system is established with the crack evaluation value Pi and the axial length of the steel bar as the ordinate and abscissa respectively, and an evaluation value curve is obtained according to the coordinate system; The axial length of the steel bar is calculated according to the following formula ， ， Where x0 is the axial length of the end of the steel bar beyond the lifting support, D is the distance between the two lifting supports, L is the scanning length of the line scanning module, ɑ is the shrinkage ratio, r is the axial bending radius of the steel, and d is the average cross-sectional radius of the steel bar.

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