Method and device for measuring total elongation of maximum force of steel bar

Abstract

The application relates to a method and device for measuring the maximum force total elongation rate of a steel bar, and relates to the technical field of elongation rate measurement. The method comprises the following steps: gradually applying force to a test steel bar, when a target force value corresponding to a target moment is not less than other force values corresponding to other moments, obtaining the difference between the target force value and the other force values; at the target moment, a first camera is used to collect the deformation amount in the target range of the test steel bar; and the elongation rate of the steel bar is calculated according to the deformation amount in the target range of the test steel bar, the length in the target range of the test steel bar, the difference between the target force value and the other force values, the cross-sectional area of the test steel bar and the elastic modulus of the test steel bar. The application does not need to break the steel bar, can calculate the maximum force total elongation rate of the steel bar, and has the advantages of lower cost and stronger universality.

Description

Technical Field

[0001] This application relates to the field of elongation measurement technology, and in particular to a method and apparatus for measuring the total elongation of steel bars under maximum force. Background Technology

[0002] Currently, during steel bar tensile testing, the maximum total elongation of the steel bar can be estimated by breaking the steel bar with a tensile testing machine. However, the huge reaction force generated by breaking the steel bar will cause wear and even damage to the tensile testing machine over time, and the accuracy of the measured maximum total elongation of the steel bar is also low. Summary of the Invention

[0003] This application aims to at least address the technical problem that existing methods for calculating the maximum total elongation of a reinforcing bar after it has been broken can damage the tensile testing machine. To this end, this application proposes a method and apparatus for measuring the maximum total elongation of a reinforcing bar.

[0004] In a first aspect, this application provides a method for measuring the total elongation at maximum force of reinforcing bars, the method comprising: A gradual force is applied to the test steel bar. When the target force value at the target time is not less than the other force values ​​at other times, the difference between the target force value and the other force values ​​is obtained. At the target time, the deformation of the test steel bar within the target range is captured by the first camera; The maximum total elongation of the reinforcing bar is calculated based on the deformation within the target range of the test reinforcing bar, the length within the target range of the test reinforcing bar, the difference between the target force value and the other force values, the cross-sectional area of ​​the test reinforcing bar, and the elastic modulus of the test reinforcing bar.

[0005] By adopting the above technical solution, this application does not require breaking the steel bar to estimate the maximum total elongation of the steel bar, nor does it calculate the maximum total elongation of the steel bar based on the maximum force value. Instead, it calculates the maximum total elongation of the steel bar by measuring the deformation within the target range of the test steel bar, the length within the target range of the test steel bar, the difference between the target force value and other force values, the cross-sectional area of ​​the test steel bar, and the elastic modulus of the test steel bar. This method has the advantages of high accuracy, low cost, and greater universality.

[0006] According to one embodiment of this application, the difference between the target force value and the other force values ​​includes: After the target time and within a unit time period, acquire the force values ​​for the target number of times; Based on the target force value, the target number of times, and the force values ​​under the target number of times, the difference between the target force value and the other force values ​​is determined.

[0007] By adopting the above technical solution, the total elongation of the maximum force of the test steel bar can be composed of two parts: the deformation within the target range of the test steel bar and the deformation to compensate for the difference between the maximum force and the time of maximum force. In this way, the total elongation of the maximum force of the test steel bar is more accurate.

[0008] According to one embodiment of this application, at the target time, the deformation of the test steel bar within the target range is acquired by a first camera, including: At the target time, identify the necking region of the test steel bar; The target range of the test steel bar is selected from the area other than the necking region. The deformation of the test steel bar within the target range is captured by the first camera.

[0009] By adopting the above technical solution, in areas other than the necking region of the reinforcing bar, the deformation of the reinforcing bar is relatively small due to the smaller tensile force, and the image is clearer and easier to measure, thus obtaining more accurate results in the image processing and measurement process.

[0010] According to one embodiment of this application, selecting a region other than the necking region of the test rebar as the target range of the test rebar includes: When the necking region of the test steel bar is located at the lower part of the test steel bar, the upper part of the test steel bar is selected as the target range of the test steel bar; Alternatively, when the necking region of the test steel bar is located at the upper part of the test steel bar, the lower part of the test steel bar is selected as the target range of the test steel bar.

[0011] According to one embodiment of this application, the deformation of the test steel bar within the target range is acquired by the first camera, including: Several gauge lengths are planned within the target range of the test reinforcement; The deformation of several gauge lengths is collected using the first camera; The average of the deformation of several gauge lengths is the deformation within the target range of the test steel reinforcement.

[0012] According to one embodiment of this application, before applying a gradual force to the test steel bar, the method further includes: The cross-sectional area of ​​the test steel bar was captured by a second camera; Obtain the elastic modulus of the test steel bar corresponding to the cross-sectional area of ​​the test steel bar.

[0013] By adopting the above technical solution, the second camera is directly opposite the end of the test steel bar and is used to collect the cross-sectional area of ​​the test steel bar. The processor, which is electrically connected to the second camera, can retrieve the elastic modulus of the test steel bar corresponding to the cross-sectional area of ​​the test steel bar.

[0014] Secondly, this application provides a measuring device for the total elongation of steel bars under maximum force, comprising: The first acquisition module is used to acquire the length of the test steel bar within the target range and the deformation of the test steel bar within the target range at the target time using the first camera; The second acquisition module is used to acquire the cross-sectional area of ​​the test steel bar through the second camera; The third acquisition module is used to acquire the target force value of the test steel bar at the target time and other force values ​​at other times through a force sensor; The first acquisition module is used to acquire the elastic modulus of the test steel bar corresponding to the cross-sectional area of ​​the test steel bar; The second acquisition module is used to acquire the difference between the target force value and the other force values ​​when the target force value at the target time is not less than the other force values ​​at other times. The processing module is used to calculate the maximum total force elongation of the reinforcing bar based on the deformation within the target range of the test reinforcing bar, the length within the target range of the test reinforcing bar, the difference between the target force value and the other force values, the cross-sectional area of ​​the test reinforcing bar, and the elastic modulus of the test reinforcing bar.

[0015] By adopting the above technical solution, this application calculates the total elongation of the steel bar at maximum force without relying on the maximum force value, using the deformation within the target range of the test steel bar, the length within the target range of the test steel bar, the difference between the target force value and other force values, the cross-sectional area of ​​the test steel bar, and the elastic modulus of the test steel bar.

[0016] According to one embodiment of this application, the measuring device for the total elongation of the maximum force of the reinforcing bar further includes: The judgment module is used to compare the maximum total elongation of the steel bar with the target elongation of the steel bar and output the qualified result of the steel bar.

[0017] By adopting the above technical solution, engineers can compare the total elongation of the maximum force calculated by the above-mentioned test steel bars with the target elongation of the corresponding steel bars, thereby determining whether the test steel bars are qualified.

[0018] Thirdly, this application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for measuring the total elongation of the maximum force of the reinforcing bar as described in the first aspect above.

[0019] Fourthly, this application provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for measuring the total elongation of the maximum force of the reinforcing bar as described in the first aspect above.

[0020] Fifthly, this application provides a chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the method for measuring the total elongation of the maximum force of steel bars as described in the first aspect.

[0021] In a sixth aspect, this application provides a computer program product, including a computer program that, when executed by a processor, implements the method for measuring the total elongation of the maximum force of steel bars as described in the first aspect above.

[0022] In summary, this application includes at least one of the following beneficial technical effects: This application does not require breaking the reinforcing bar to estimate the maximum total elongation of the reinforcing bar, nor does it calculate the maximum total elongation of the reinforcing bar based on the maximum force value. Instead, it calculates the maximum total elongation of the reinforcing bar by measuring the deformation within the target range of the test reinforcing bar, the length within the target range of the test reinforcing bar, the difference between the target force value and other force values, the cross-sectional area of ​​the test reinforcing bar, and the elastic modulus of the test reinforcing bar. This has the advantages of high accuracy, low cost, and greater universality. Attached Figure Description

[0023] Figure 1 This is a flowchart illustrating the method for measuring the total elongation of the maximum force of reinforcing bars provided in the embodiments of this application; Figure 2 This is a schematic diagram showing the tensile strength and elongation of the test steel bars; Figure 3 This is a schematic diagram of the structure of the measuring device for the total elongation of the maximum force of reinforcing bars provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0025] The following is for reference. Figure 1 A method for measuring the total elongation of the maximum force of steel bars according to an embodiment of this application is described.

[0026] like Figure 1 As shown, the method for measuring the total elongation of the maximum force of the steel bar includes steps 110, 120 and 130.

[0027] Step 110: Apply a gradual force to the test steel bar. When the target force value at the target time is not less than the other force values ​​at other times, obtain the difference between the target force value and other force values.

[0028] In this step, the two tension ends of the tensile testing machine are fixedly connected to the two ends of the test steel bar. The tension ends of the tensile testing machine apply a uniformly increasing load to the test steel bar and record the force value at each time. When the target force value at the target time is greater than or equal to the other force values ​​at other times, the difference between the target force value and other force values ​​is obtained.

[0029] In practice, the tensile testing machine can be equipped with a force sensor with a frequency of 30Hz or higher. This force sensor can collect the target force value of the test steel bar at the target time and other force values ​​at other times.

[0030] In practice, a clamp can also be installed on the tensile end of the tensile testing machine to fix the test steel bar. The test steel bar can be of models such as HRB400E, HRB335, and Q235.

[0031] Step 120: At the target time, collect the deformation of the test steel bar within the target range using the first camera.

[0032] In this step, the first camera can be set on one side of the test steel bar to collect the deformation of the test steel bar within the target range at the target time.

[0033] The target range can be selected as an area where the deformation of the test steel bar is relatively small, so that the image may be clearer and easier to measure. Conversely, if the target range is selected as an area where the deformation of the test steel bar is relatively large, the image captured by the first camera may be blurry, which is not conducive to measurement.

[0034] Step 130: Calculate the maximum total elongation of the steel bar based on the deformation within the target range of the test steel bar, the length within the target range of the test steel bar, the difference between the target force value and other force values, the cross-sectional area of ​​the test steel bar, and the elastic modulus of the test steel bar.

[0035] The maximum total elongation of the reinforcing steel can be calculated using the following formula: Among them, A gt To test the total elongation of the steel reinforcement under maximum force; ε t The deformation of the test steel bar within the target range; L is the length of the test steel bar within the target range; Fm is the target force value at the target time; F N For other time intervals, represents the corresponding force values; S represents the cross-sectional area of ​​the test steel bar; and E represents the elastic modulus of the test steel bar.

[0036] In related technologies, ultra-high pixel video systems can be used to record the state of the test steel bars in real time. By retrieving the video recordings, the maximum force value of the test steel bars at a certain moment can be accurately obtained, and then the total elongation of the maximum force of the test steel bars can be calculated. However, such ultra-high pixel video systems are very expensive to manufacture and purchase, making them unsuitable for widespread use in steel bar tensile tests.

[0037] In the above embodiments of this application, the first camera is less expensive than the ultra-high pixel video system in the related technology. For example, if the size of the test steel bar is 300mm*10mm, a camera with 2 megapixels (1600pixel*1200pixel) can be used as the first camera.

[0038] The first camera records the tensile state of the test steel bars by capturing images.

[0039] like Figure 2 As shown, if the maximum force value is at point a, the target force value at the target time is at point b, and the other force values ​​at other times are at point c. Point b may be between point a and point c. That is, the first camera may not be able to capture the maximum force value by taking a picture. In other words, the target force value at the target time may be close to the maximum force value, but not the same as the maximum force value.

[0040] In this case, this application calculates the total elongation of the steel bar by means of the deformation within the target range of the test steel bar, the length within the target range of the test steel bar, the difference between the target force value and other force values, the cross-sectional area of ​​the test steel bar, and the elastic modulus of the test steel bar, without relying on the maximum force value.

[0041] In summary, this application does not require breaking the reinforcing bar to estimate the maximum total elongation of the reinforcing bar, nor does it calculate the maximum total elongation of the reinforcing bar based on the maximum force value. Instead, it calculates the maximum total elongation of the reinforcing bar by measuring the deformation within the target range of the test reinforcing bar, the length within the target range of the test reinforcing bar, the difference between the target force value and other force values, the cross-sectional area of ​​the test reinforcing bar, and the elastic modulus of the test reinforcing bar. This method has the advantages of high accuracy, low cost, and greater universality.

[0042] It should be noted that different grades of steel bars must meet the corresponding maximum force total elongation standard during testing; otherwise, they will be considered unqualified. In other words, engineers can compare the maximum force total elongation calculated for the above-mentioned test steel bars with the corresponding maximum force total elongation standard to determine whether the test steel bars are qualified.

[0043] In some embodiments, before step 110, applying a gradual force to the test steel bar, the method further includes: The cross-sectional area of ​​the test steel bars was collected using a second camera.

[0044] Obtain the elastic modulus of the test steel bar corresponding to its cross-sectional area.

[0045] In this embodiment, the second camera is directly opposite the end of the test steel bar and is used to collect the cross-sectional area of ​​the test steel bar. The elastic modulus of the test steel bar corresponding to the cross-sectional area can be retrieved by the processor electrically connected to the second camera.

[0046] In some embodiments, step 110, the difference between the target force value and other force values, includes steps 111 and 112.

[0047] Step 111: After the target time and within the unit time period, obtain the force values ​​for each number of times the target is reached.

[0048] In this step, the selection of the unit time period and the target number of times should be reasonable. This embodiment does not impose any restrictions. For example, the unit time period can be 1 second, the target number of times can be 10 times, and the force value is obtained 10 times after the target time and within an interval of 1 second.

[0049] In actual execution, these 10 force values ​​can be captured by a camera and the readings of the force sensor at the moment of capture are recorded. These 10 force values ​​are F1, F2, F3...FN.

[0050] Step 112: Based on the target force value, the target number of times, and the force values ​​under the target number of times, determine the difference between the target force value and other force values.

[0051] The maximum total elongation of the reinforcing steel can be calculated using the following formula: Among them, A gt To test the total elongation of the steel reinforcement under maximum force; ε t The deformation of the test steel bar within the target range; L is the length of the test steel bar within the target range; N is the target test number; Fm is the target force value at the target time; F N For other time intervals, represents the corresponding force values; S represents the cross-sectional area of ​​the test steel bar; and E represents the elastic modulus of the test steel bar.

[0052] In this embodiment, the total elongation of the test steel bar under maximum force can be composed of two parts: the deformation of the test steel bar within the target range and the deformation to compensate for the difference between the maximum force and the time of maximum force. This makes the measured total elongation of the test steel bar under maximum force more accurate.

[0053] In some embodiments, step 120, at the target time, collecting the deformation of the test steel bar within the target range using the first camera, includes steps 121-125.

[0054] Step 121: At the target time, identify the necking region of the test steel bar.

[0055] In this step, the necking region of the test steel bar is the area where the cross-section of the test steel bar begins to shrink locally when the tensile force increases. This necking region can be 50 mm or 2d, where d is the diameter of the test steel bar.

[0056] Step 122: Select the area outside the necking region of the test steel bar as the target range for the test steel bar.

[0057] Specifically, when the necking region of the test steel bar is located at the bottom of the test steel bar, the upper region of the test steel bar is selected as the target range of the test steel bar; when the necking region of the test steel bar is located at the top of the test steel bar, the lower region of the test steel bar is selected as the target range of the test steel bar.

[0058] In this step, areas outside the necking region of the reinforcing bar have relatively small deformation due to the smaller tensile force, resulting in clearer and easier-to-measure images. Consequently, more accurate results can be obtained during image processing and measurement.

[0059] Step 123: Plan several gauge lengths within the target range of the test reinforcement.

[0060] In this step, there can be 10 gauge lengths, each gauge length being 10 mm.

[0061] Step 124: Collect the deformation of several gauge lengths using the first camera.

[0062] Step 125: The average of the deformation of several gauge lengths is the deformation within the target range of the test steel reinforcement.

[0063] In this embodiment, several gauge lengths are 10 gauge lengths, numbered ε in sequence. t1 ε t2 ~ε t10 The average of the 10 gauge lengths above, after removing the extreme values, is denoted as ε. t , the ε t To test the deformation of the reinforcing steel within the target range.

[0064] It should be understood that the method for measuring the total elongation of the maximum force of steel bars can be applied to the terminal, specifically by the hardware or software in the terminal.

[0065] The terminal includes, but is not limited to, portable communication devices such as mobile phones or tablets with touch-sensitive surfaces (e.g., touchscreen displays and / or touchpads).

[0066] It should also be understood that, in some embodiments, the terminal may not be a portable communication device, but a desktop computer with a touch-sensitive surface (e.g., a touchscreen display and / or touchpad).

[0067] The following embodiments describe a terminal including a display and a touch-sensitive surface. However, the terminal may include one or more other physical user interface devices such as a physical keyboard, mouse, and joystick.

[0068] The method for measuring the total elongation of steel bars under maximum force provided in this application can be executed by a device for measuring the total elongation of steel bars under maximum force. This application uses the device for measuring the total elongation of steel bars under maximum force as an example to illustrate the device for measuring the total elongation of steel bars under maximum force provided in this application.

[0069] like Figure 3 As shown, the measuring device 200 for the maximum total elongation of the reinforcing bar includes: The first acquisition module 210 is used to acquire the length of the test steel bar within the target range and the deformation of the test steel bar within the target range at the target time through the first camera.

[0070] The second acquisition module 220 is used to acquire the cross-sectional area of ​​the test steel bar through the second camera; The third acquisition module 230 is used to acquire the target force value of the test steel bar at the target time and other force values ​​at other times through the force sensor.

[0071] The first acquisition module 240 is used to acquire the elastic modulus of the test steel bar corresponding to the cross-sectional area of ​​the test steel bar.

[0072] The second acquisition module 250 is used to acquire the difference between the target force value and other force values ​​when the target force value at the target time is not less than the other force values ​​at other times.

[0073] The processing module 260 is used to calculate the elongation of the reinforcing bar based on the deformation within the target range of the test reinforcing bar, the length within the target range of the test reinforcing bar, the difference between the target force value and other force values, the cross-sectional area of ​​the test reinforcing bar, and the elastic modulus of the test reinforcing bar.

[0074] The measuring device 200 for measuring the total elongation of the maximum force of the reinforcing bar also includes a judgment module.

[0075] The judgment module is used to compare the maximum total elongation of the steel bar with the target elongation of the steel bar and output the qualified result of the steel bar.

[0076] The target elongation rate of the steel bar is the standard for the maximum total elongation rate corresponding to the type of steel bar tested.

[0077] The measuring device 200 for the maximum total elongation of the reinforcing bar in this embodiment can be an electronic device or a component within an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, robot, wearable device, personal computer (PC), etc., and this embodiment does not impose specific limitations.

[0078] The measuring device 200 for measuring the total elongation of the maximum force of the reinforcing bars in this embodiment can be a device with an operating system. This operating system can be a Microsoft (Windows) operating system, an Android operating system, an iOS operating system, or other possible operating systems; this embodiment does not specifically limit it.

[0079] The measuring device 200 for measuring the total elongation of the maximum force of reinforcing bars provided in this application embodiment can achieve... Figure 1 The various processes implemented in the method implementation examples will not be described again here to avoid repetition.

[0080] In some embodiments, such as Figure 4 As shown, this application embodiment also provides an electronic device 300, including a processor 310, a memory 320, and a computer program stored in the memory 320 and executable on the processor 310. When the program is executed by the processor 3101, it implements the various processes of the above-described method embodiment for measuring the total elongation of the maximum force of the steel bar, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0081] It should be noted that the electronic devices in the embodiments of this application include the mobile electronic devices and non-mobile electronic devices described above.

[0082] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described method embodiment for measuring the total elongation of the maximum force of steel bars and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0083] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0084] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-mentioned method for measuring the total elongation of the maximum force of steel bars.

[0085] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0086] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described embodiment of the method for measuring the total elongation of the maximum force of steel bars, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0087] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0088] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0089] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0090] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0091] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for measuring the total elongation at maximum force of reinforcing bars, characterized in that, include: A gradual force is applied to the test steel bar. When the target force value at the target time is not less than the other force values ​​at other times, the difference between the target force value and the other force values ​​is obtained. At the target time, the deformation of the test steel bar within the target range is captured by the first camera; The maximum total force elongation of the steel bar is calculated based on the deformation within the target range of the test steel bar, the length within the target range of the test steel bar, the difference between the target force value and the other force values, the cross-sectional area of ​​the test steel bar, and the elastic modulus of the test steel bar. Formula for calculating the maximum total elongation of steel reinforcement: ,in, To test the total elongation of the steel reinforcement under maximum force; To test the deformation of the reinforcing steel within the target range; The length of the test reinforcement within the target range; For the target number of times; The target force value at the target time; For other force values ​​at other times; The cross-sectional area of ​​the test steel reinforcement; To test the elastic modulus of the reinforcing steel; The unit time period is 1 second, the target number of times is 10, and the force values ​​are acquired 10 times after the target time and within an interval of 1 second; the 10 force values ​​are F1, F2, F3...FN respectively; The difference between the target force value and the other force values ​​includes: After the target time and within a unit time period, acquire the force values ​​for the target number of times; Based on the target force value, the target number of times, and the force values ​​under the target number of times, determine the difference between the target force value and the other force values; At the target time, the deformation of the test steel bar within the target range is acquired by the first camera, including: At the target time, identify the necking region of the test steel bar; The target range of the test steel bar is selected from the area other than the necking region. The deformation of the test steel bar within the target range is captured by the first camera.

2. The method for measuring the total elongation of the maximum force of reinforcing bars according to claim 1, characterized in that, The target range for the test reinforcement is selected from areas other than the necking region, including: When the necking region of the test steel bar is located at the lower part of the test steel bar, the upper part of the test steel bar is selected as the target range of the test steel bar; Alternatively, when the necking region of the test steel bar is located at the upper part of the test steel bar, the lower part of the test steel bar is selected as the target range of the test steel bar.

3. The method for measuring the total elongation of the maximum force of reinforcing bars according to claim 1, characterized in that, The deformation of the test steel bar within the target range is captured by the first camera, including: Several gauge lengths are planned within the target range of the test reinforcement; The deformation of several gauge lengths is collected using the first camera; The average of the deformation of several gauge lengths is the deformation within the target range of the test steel reinforcement.

4. The method for measuring the total elongation of the maximum force of reinforcing bars according to any one of claims 1-3, characterized in that, Before applying a gradual force to the test steel bar, the method further includes: The cross-sectional area of ​​the test steel bar was captured by a second camera; Obtain the elastic modulus of the test steel bar corresponding to the cross-sectional area of ​​the test steel bar.

5. A measuring device for the total elongation at maximum force of reinforcing bars, characterized in that, include: The first acquisition module is used to acquire the length of the test steel bar within the target range and the deformation of the test steel bar within the target range at the target time through the first camera; The second acquisition module is used to acquire the cross-sectional area of ​​the test steel bar through the second camera; The third acquisition module is used to acquire the target force value of the test steel bar at the target time and other force values ​​at other times through a force sensor; The first acquisition module is used to acquire the elastic modulus of the test steel bar corresponding to the cross-sectional area of ​​the test steel bar; The second acquisition module is used to acquire the difference between the target force value and the other force values ​​when a target force value at a target time is not less than the other force values ​​at other times when a gradual force is applied to the test steel bar. The processing module is used to calculate the maximum total force elongation of the steel bar based on the deformation within the target range of the test steel bar, the length within the target range of the test steel bar, the difference between the target force value and the other force values, the cross-sectional area of ​​the test steel bar, and the elastic modulus of the test steel bar. Formula for calculating the maximum total elongation of steel reinforcement: ,in, To test the total elongation of the steel reinforcement under maximum force; To test the deformation of the reinforcing steel within the target range; The length of the test reinforcement within the target range; For the target number of times; The target force value at the target time; For other force values ​​at other times; The cross-sectional area of ​​the test steel reinforcement; To test the elastic modulus of the reinforcing steel; The unit time period is 1 second, the target number of times is 10, and the force values ​​are acquired 10 times after the target time and within an interval of 1 second; the 10 force values ​​are F1, F2, F3...FN respectively; The difference between the target force value and the other force values ​​includes: After the target time and within a unit time period, acquire the force values ​​for the target number of times; Based on the target force value, the target number of times, and the force values ​​under the target number of times, determine the difference between the target force value and the other force values; At the target time, the deformation of the test steel reinforcement within the target range is collected, including: At the target time, identify the necking region of the test steel bar; The target range of the test steel bar is selected from the area other than the necking region. The deformation of the test steel bar within the target range is captured by the first camera.

6. The measuring device for the total elongation of the maximum force of reinforcing bars according to claim 5, characterized in that, Also includes: The judgment module is used to compare the maximum total elongation of the steel bar with the target elongation of the steel bar and output the qualified result of the steel bar.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method for measuring the total elongation of the maximum force of the reinforcing bar as described in any one of claims 1-4.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the method for measuring the total elongation of the maximum force of the reinforcing bar as described in any one of claims 1-4.

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