CN114001663A - Rapid verification method and device for strain video control system of waviness test sample - Google Patents
Rapid verification method and device for strain video control system of waviness test sample Download PDFInfo
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Abstract
The invention discloses a quick verification method and a quick verification device for a strain video control system of a waviness test sample.
Description
Technical Field
The invention relates to the technical field of material physical and chemical performance testing, in particular to a quick verification method and device for a strain video control system of a waviness test sample.
Background
In the field of material physical and chemical performance testing, the testing process of indexes such as waviness and the like can involve measurement of dependent variables or further carry out signal feedback on equipment through measurement data. According to the current detection technology, the strain video control system of the waviness test sample can realize measurement of the strain of the waviness test sample, the video control system feeds back the testing machine to stop operation through image acquisition and calculation of the video control system, and when the video control system considers that the strain of the waviness test sample reaches a specified strain value through measurement of the strain, the testing machine is fed back to stop continuous stamping.
In order to ensure the accuracy of the strain measurement of the strain video control system of the waviness test sample, the video control system needs to be checked. The current verification method is to verify through a self-contained reaming standard plate, but the verification size of the reaming standard plate is limited within 10mm, the size of a strain area of a daily waviness test sample is 100mm, the size of a strain center area is 30mm, and the verification method through the self-contained reaming standard plate cannot meet the requirement.
Disclosure of Invention
The embodiment of the application provides a quick verification method and device for a strain video control system of a waviness test sample, solves the technical problem that the accuracy of the strain video control system of the waviness test sample cannot be verified in the prior art, and realizes quick verification of the strain video control system of the waviness test sample.
On one hand, the present application provides the following technical solutions through an embodiment of the present application:
a quick verification method for a strain video control system of a waviness test sample comprises the following steps:
setting identification points on the surface of a strain area of a waviness test sample, and selecting a first check point, a second check point, a third check point and a fourth check point from the identification points, wherein a connecting line of the first check point and the second check point is vertical to and intersects with a connecting line of the third check point and the fourth check point;
measuring the distance between the first check point and the second check point and recording the distance as a first initial length, and measuring the distance between the third check point and the fourth check point and recording the distance as a second initial length;
setting the first check point, the second check point, the third check point and the fourth check point as tracking points of a strain video control system of the waviness test sample, and controlling a testing machine to punch a strain area of the waviness test sample according to set strain;
after the punching is stopped, measuring the distance between the first check point and the second check point again and recording the distance as a first strain length, and measuring the distance between the third check point and the fourth check point again and recording the distance as a second strain length;
calculating a first strain quantity according to the first initial length and the first strain length, and calculating a second strain quantity according to the second initial length and the second strain length;
and judging whether the strain video control system of the waviness test sample meets the requirements or not according to the set strain quantity, the first strain quantity and the second strain quantity.
Preferably, one of the first check point and the second check point coincides with one of the third check point and the fourth check point.
Preferably, the calculating a first strain amount according to the first initial length and the first strain length, and calculating a second strain amount according to the second initial length and the second strain length includes:
ΔL1＝(L2-L1)/L1，ΔL2＝(L4-L3)/L3；
Δ L1 is the first strain variable, L1 is the first initial length, L2 is the first strain length;
Δ L2 is the second strain amount, L3 is the second initial length, and L4 is the second strain length.
Preferably, the determining whether the strain video control system of the waviness test sample meets the requirements according to the set strain, the first strain and the second strain includes:
if the first strain variable is not larger than the second strain variable, judging whether the first strain variable meets a first preset condition, if so, judging that the strain video control system of the waviness test sample meets the requirement, otherwise, judging that the strain video control system of the waviness test sample does not meet the requirement;
if the first strain quantity is larger than the second strain quantity, whether the second strain quantity meets a second preset condition is judged, if yes, the strain video control system of the waviness test sample is judged to meet the requirement, and if not, the strain video control system of the waviness test sample is judged to not meet the requirement.
Preferably, the first preset condition is that: (Δ L1- α)/α < β; the second preset condition is as follows: (Δ L2- α)/α < β;
Δ L1 is the first dependent variable, Δ L2 is the second dependent variable, α is the set dependent variable, and β is a set deviation threshold.
Preferably, β is 5%.
On the other hand, the application also provides the following technical scheme:
a quick verification device of a waviness test sample strain video control system comprises:
the calibration point setting module is used for setting identification points on the surface of a strain area of a waviness test sample, and selecting a first calibration point, a second calibration point, a third calibration point and a fourth calibration point from the identification points, wherein a connecting line of the first calibration point and the second calibration point is perpendicular to and intersects with a connecting line of the third calibration point and the fourth calibration point;
the length measuring module is used for measuring the distance between the first check point and the second check point and recording the distance as a first initial length, and measuring the distance between the third check point and the fourth check point and recording the distance as a second initial length;
the stamping control module is used for setting the first check point, the second check point, the third check point and the fourth check point as tracking points of the strain video control system of the waviness test sample, and controlling the testing machine to stamp a strain area of the waviness test sample according to a set strain;
the length measuring module is further used for measuring the distance between the first check point and the second check point again and recording the distance as a first strain length after the punching is stopped, and measuring the distance between the third check point and the fourth check point again and recording the distance as a second strain length;
the strain calculation module is used for calculating a first strain according to the first initial length and the first strain length and calculating a second strain according to the second initial length and the second strain length;
and the judging module is used for judging whether the strain video control system of the waviness test sample meets the requirements or not according to the set strain, the first strain and the second strain.
Preferably, one of the first check point and the second check point coincides with one of the third check point and the fourth check point.
On the other hand, the application also provides the following technical scheme:
an electronic device comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the program to realize the rapid verification method of any one of the above-mentioned waviness test sample strain video control systems.
On the other hand, the application also provides the following technical scheme:
a computer readable storage medium, which when executed, implements a method for fast verification of any of the above-mentioned strain video control systems for waviness test samples.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the actual strain of the test sample after the punching is stopped is obtained through measurement and calculation, and is compared with the set strain followed by the video control system feedback testing machine for stopping punching, whether the accuracy of the video control system meets the requirement or not can be judged, and the rapid verification of the strain video control system of the waviness test sample is realized. As the check point can be freely selected, the first initial length and the second initial length can reach 100mm, the check size can reach 100mm, the test area is completely covered, and the check in the test process of the waviness test sample with the strain area size of 100mm in the video control system can be met. Because the video control system is only required to be checked when the first ripple degree test sample is tested, the rapid checking operation is completed when the first ripple degree test sample is tested, the process waste is eliminated, and the test efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a flow chart of a fast verification method of a strain video control system of a waviness test specimen according to the present invention;
FIG. 2 is a schematic diagram of a point of reference and a point of check according to the present invention;
fig. 3 is a block diagram of a fast verification apparatus of a strain video control system for a waviness test sample according to the present invention.
Description of reference numerals:
10-waviness test specimens; 20-identification points; 201-a first checkpoint; 202-a second checkpoint; 203-third checkpoint; 204-fourth checkpoint.
Detailed Description
The embodiment of the application provides a quick verification method for a strain video control system of a waviness test sample, and solves the technical problem that the accuracy of the strain video control system of the waviness test sample cannot be verified in the prior art.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
a method for fast verifying a strain video control system of a waviness test sample, as shown in fig. 1, includes:
step S1, setting identification points on the surface of the strain area of the waviness test sample, and selecting a first check point, a second check point, a third check point and a fourth check point from the identification points, wherein the connecting line of the first check point and the second check point is vertical to and intersects with the connecting line of the third check point and the fourth check point;
step S2, measuring the distance between the first check point and the second check point and recording the distance as a first initial length, and measuring the distance between the third check point and the fourth check point and recording the distance as a second initial length;
step S3, setting a first check point, a second check point, a third check point and a fourth check point as tracking points of a strain video control system of the waviness test sample, and controlling a testing machine to punch a strain area of the waviness test sample according to the set strain;
step S4, after the punching is stopped, measuring the distance between the first check point and the second check point again and recording the distance as the first strain length, and measuring the distance between the third check point and the fourth check point again and recording the distance as the second strain length;
step S5, calculating a first strain according to the first initial length and the first strain length, and calculating a second strain according to the second initial length and the second strain length;
and step S6, judging whether the strain video control system of the waviness test sample meets the requirements or not according to the set strain, the first strain and the second strain.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Typically, the strain area of a daily waviness test specimen is a circle of 100mm diameter. The method is characterized in that the method is required to meet the requirements in test standards of indexes such as waviness and the like, when the sample is deformed by punching, the strain of the sample in two vertical directions reaches a specified strain value, so that a video control system is required to track two pairs of characteristic points in all characteristic points in a strain area in the process that a feedback testing machine stops punching, the video control system is required to track the two pairs of characteristic points, connecting lines of the two pairs of characteristic points are mutually perpendicular and intersected, or three characteristic points are tracked, the connecting lines of the three characteristic points form an L-shaped line segment, in short, 3 or 4 characteristic points form two mutually perpendicular and intersected line segments, the strain is calculated according to the length of the two mutually perpendicular and intersected line segments, and the feedback testing machine stops punching when the set strain is reached. And due to the difference of the tissue performance of the materials in different directions, the strain difficulty of the waviness test sample in two mutually perpendicular directions is different, and the test standards of indexes such as waviness require that the waviness test sample reaches specified strain in the two mutually perpendicular directions, so that after two strains are calculated according to two mutually perpendicular line sections, the smaller of the two strains is taken as a judgment object. In this embodiment, the two pairs of feature points are a first check point, a second check point, a third check point and a fourth check point, the first check point and the second check point form one pair of feature points, and the third check point and the fourth check point form another pair of feature points; or when any one of the conditions of the coincidence of the first check point and the third check point, the coincidence of the first check point and the fourth check point, the coincidence of the second check point and the third check point and the coincidence of the second check point and the fourth check point is satisfied, only 3 characteristic points are provided, namely, the connecting lines of the three characteristic points form an L-shaped line segment.
Based on the above analysis, the verification point selected in this embodiment needs to be the same as the feature point tracked by the video control system, so that the verification effect can be achieved.
The testing of indexes such as the waviness is continuous testing of a plurality of waviness testing samples in the same batch, so that the video control system only needs to be checked when the first waviness testing sample is tested, the video control system meets requirements only when the first waviness testing sample is tested, and the video control system does not need to be checked when the subsequent waviness testing samples are tested. In step S1, mark points are set on the surface of the strain region of the first waviness test sample, as shown in fig. 2, the mark points are part of the strain region and can be set by an ink roller brush. In steps S2 and S4, the first initial length and the second initial length may be measured by a vernier caliper. In step S3, after selecting 3 or 4 identification points, the selected 3 or 4 identification points need to be set as tracking points, i.e., feature points, of the strain video control system of the waviness test sample.
In the stamping process of the testing machine, the strain video control system of the waviness test sample can calculate the strain amount of the waviness test sample in two mutually perpendicular directions by tracking the first check point, the second check point, the third check point and the fourth check point. And after the strain video control system of the waviness test sample calculates two strain quantities of the waviness test sample in the first direction and the second direction, if the smaller one of the two strain quantities reaches a set strain quantity, the strain video control system of the waviness test sample feeds back the testing machine to stop punching.
After the punching is stopped, the video control system considers that the dependent variables of the waviness test sample in two mutually perpendicular directions meet the requirements, and the judgment result of the video control system needs to be verified in the embodiment. Therefore, after the punching is stopped, the first strain length and the second strain length need to be measured again, the first strain quantity is calculated according to the first initial length and the first strain length, the second strain quantity is calculated according to the second initial length and the second strain length, the first strain quantity and the second strain quantity represent actual strain quantities, whether the smaller one of the first strain quantity and the second strain quantity reaches the set strain quantity or not is judged, if yes, the accuracy of the video control system meets the requirement, and otherwise, the accuracy of the video control system does not meet the requirement.
As mentioned above, the video control system can track 3 or 4 feature points, so that the embodiment can select 3 or 4 check points as well, and the embodiment can prefer 3 check points, that is, one of the first check point and the second check point coincides with one of the third check point and the fourth check point, which can be understood as four cases: the first check point and the third check point are overlapped; the first check point and the fourth check point are overlapped; the second check point is coincided with the third check point; the second check point coincides with the fourth check point. Therefore, the selection process of one check point can be omitted, and the check speed is accelerated.
In this embodiment, step S5 includes:
ΔL1＝(L2-L1)/L1，ΔL2＝(L4-L3)/L3；
Δ L1 is a first strain variable, L1 is a first initial length, L2 is a first strain length;
Δ L2 is the second strain amount, L3 is the second initial length, and L4 is the second strain length.
It is easy to understand that after the punching strain of the waviness test sample, the length of two sections formed by the check points becomes longer, namely L2 is larger than L1, and L4 is larger than L3. Thus, the acquisition of the first dependent variable and the second dependent variable can be realized according to the formula.
Since it is necessary to determine whether the smaller of the first dependent variable and the second dependent variable reaches the set dependent variable after the first dependent variable and the second dependent variable are acquired, step S6 in this embodiment includes: if the first strain variable is not larger than the second strain variable, judging whether the first strain variable meets a first preset condition, if so, judging that the strain video control system of the waviness test sample meets the requirement, otherwise, judging that the strain video control system of the waviness test sample does not meet the requirement; if the first strain quantity is larger than the second strain quantity, whether the second strain quantity meets a second preset condition is judged, if yes, the strain video control system of the waviness test sample is judged to meet the requirement, and if not, the strain video control system of the waviness test sample is judged to not meet the requirement.
Wherein, if the first dependent variable is not greater than the second dependent variable, there are two situations: the first dependent variable is equal to the second dependent variable, and then the first dependent variable and the second dependent variable can be used as the smaller of the two dependent variables, so that whether the first dependent variable meets the first preset condition or not can be judged, whether the second dependent variable meets the first preset condition or not can be judged, and the first dependent variable and the second dependent variable are actually equal; if the first dependent variable is smaller than the second dependent variable, it is determined whether the first dependent variable satisfies the first predetermined condition.
Wherein, if the accuracy requirement to the video control system is extremely high, then first preset condition should be that first dependent variable equals to and sets for the dependent variable, and second preset condition should be that the second dependent variable equals to and sets for the dependent variable, is equivalent to that video control system's accuracy is 100%, but in the in-service use, video control system's accuracy hardly reaches 100%, can allow certain deviation, and first preset condition is at this moment: (Δ L1- α)/α < β; the second preset condition is as follows: (Δ L2- α)/α < β; Δ L1 is a first dependent variable, Δ L2 is a second dependent variable, α is a set dependent variable, and β is a set deviation threshold. For beta, if the value is too large, the allowable deviation of the accuracy of the video control system is too large, even if the video control system is checked and judged to meet the requirement, the accuracy of the video control system does not meet the test requirement, and the checking necessity is lost; if the value is too small, the allowable deviation of the accuracy of the video control system is too small, and the fact that the accuracy of the video control system meets the test requirement can be verified and judged, so that the verification necessity is lost. The value of beta can be preferably 5% in the embodiment, so that the condition that the deviation of the accuracy of the allowed video control system is too large or too small is avoided, and the necessity of verification is ensured.
In the embodiment, in a primary verification experiment, the thickness of a strip steel of a waviness test sample is 1.2mm, the size is 220mm multiplied by 220mm, the strain alpha is set to be 3%, and the deviation threshold beta is set to be 5%. When L1-99.28 mm, L3-99.16 mm, L2-102.32 mm and L4-102.48 mm are measured, Δ L1-102.32-99.28)/99.28-3.06% and Δ L2-102.48-99.16)/99.16-3.35%. The smaller of Δ L1 and Δ L2 is 3.06%, and since 3.06% is less than 5%, the accuracy of the video control system is judged to meet the requirement. Therefore, in the testing process of the first ripple degree test sample, the accuracy of the video control system is judged to meet the requirement, and the video control system can be used for continuing the testing of the subsequent samples.
Therefore, in the embodiment, the actual strain of the ripple degree test sample after the punching is stopped is obtained through measurement and calculation, and is compared with the set strain followed by the video control system feedback testing machine for stopping the punching, so that whether the accuracy of the video control system meets the requirement or not can be judged, and the rapid verification of the ripple degree test sample strain video control system is realized. As the check point can be freely selected, the first initial length and the second initial length can reach 100mm, the check size can reach 100mm, the test area is completely covered, and the check in the test process of the waviness test sample with the strain area size of 100mm in the video control system can be met. Because the video control system is only required to be checked when the first ripple degree test sample is tested, the rapid checking operation is completed when the first ripple degree test sample is tested, the process waste is eliminated, and the test efficiency is improved.
The embodiment also provides a fast verification apparatus for a waviness test sample strain video control system, as shown in fig. 3, including:
the calibration point setting module is used for setting identification points on the surface of the strain area of the waviness test sample, selecting a first calibration point, a second calibration point, a third calibration point and a fourth calibration point from the identification points, wherein a connecting line of the first calibration point and the second calibration point is vertical to and intersects with a connecting line of the third calibration point and the fourth calibration point;
the length measuring module is used for measuring the distance between the first check point and the second check point and recording the distance as a first initial length, and measuring the distance between the third check point and the fourth check point and recording the distance as a second initial length;
the stamping control module is used for setting a first check point, a second check point, a third check point and a fourth check point as tracking points of a strain video control system of the waviness test sample, and controlling the testing machine to stamp a strain area of the waviness test sample according to the set strain;
the length measuring module is also used for measuring the distance between the first check point and the second check point again after the punching is stopped and recording the distance as the first strain length, and measuring the distance between the third check point and the fourth check point again and recording the distance as the second strain length;
the strain calculation module is used for calculating a first strain according to the first initial length and the first strain length and calculating a second strain according to the second initial length and the second strain length;
and the judging module is used for judging whether the strain video control system of the waviness test sample meets the requirements or not according to the set strain, the first strain and the second strain.
The quick verification device of this embodiment obtains the actual dependent variable of waviness test sample after the punching press stops through measurement and calculation to compare with the settlement dependent variable that video control system feedback testing machine stopped the punching press and follow, can judge whether video control system's accuracy satisfies the requirement, realized the quick verification of waviness test sample video control system that meets an emergency. As the check point can be freely selected, the first initial length and the second initial length can reach 100mm, the check size can reach 100mm, the test area is completely covered, and the check in the test process of the waviness test sample with the strain area size of 100mm in the video control system can be met. Because the video control system is only required to be checked when the first ripple degree test sample is tested, the rapid checking operation is completed when the first ripple degree test sample is tested, the process waste is eliminated, and the test efficiency is improved.
Preferably, in the fast verification device of the strain video control system for the waviness test sample, one of the first verification point and the second verification point coincides with one of the third verification point and the fourth verification point. Therefore, the selection process of one check point can be omitted, and the check speed is accelerated.
Based on the same inventive concept as the above-mentioned fast verification method for the strain video control system of the waviness test sample, this embodiment further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the program, the processor implements the steps of any one of the above-mentioned fast verification methods for the strain video control system of the waviness test sample.
Where a bus architecture (represented by a bus) is used, the bus may comprise any number of interconnected buses and bridges that link together various circuits including one or more processors, represented by a processor, and memory, represented by a memory. The bus may also link various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the receiver and transmitter. The receiver and transmitter may be the same element, i.e., a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor is responsible for managing the bus and general processing, while the memory may be used for storing data used by the processor in performing operations.
Since the electronic device described in this embodiment is an electronic device used for implementing the method for fast verifying a strain video control system of a waviness test sample in this embodiment, based on the method for fast verifying a strain video control system of a waviness test sample described in this embodiment, a person skilled in the art can understand the specific implementation of the electronic device of this embodiment and various variations thereof, and therefore, how to implement the method in this embodiment of the present application by the electronic device is not described in detail herein. The electronic device used by those skilled in the art to implement the method for fast verification of the strain video control system of the waviness test sample in the embodiment of the present application is within the scope of the present application.
Based on the same inventive concept as the quick verification method of the strain video control system of the waviness test sample, the application also provides a computer readable storage medium, and when being executed, the computer readable storage medium realizes the quick verification method of any one of the strain video control systems of the waviness test sample.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A quick verification method for a strain video control system of a waviness test sample is characterized by comprising the following steps:
setting identification points on the surface of a strain area of a waviness test sample, and selecting a first check point, a second check point, a third check point and a fourth check point from the identification points, wherein a connecting line of the first check point and the second check point is vertical to and intersects with a connecting line of the third check point and the fourth check point;
measuring the distance between the first check point and the second check point and recording the distance as a first initial length, and measuring the distance between the third check point and the fourth check point and recording the distance as a second initial length;
setting the first check point, the second check point, the third check point and the fourth check point as tracking points of a strain video control system of the waviness test sample, and controlling a testing machine to punch a strain area of the waviness test sample according to set strain;
after the punching is stopped, measuring the distance between the first check point and the second check point again and recording the distance as a first strain length, and measuring the distance between the third check point and the fourth check point again and recording the distance as a second strain length;
calculating a first strain quantity according to the first initial length and the first strain length, and calculating a second strain quantity according to the second initial length and the second strain length;
and judging whether the strain video control system of the waviness test sample meets the requirements or not according to the set strain quantity, the first strain quantity and the second strain quantity.
2. The method for fast verification of a waviness test specimen strain video control system of claim 1, wherein one of the first and second verification points coincides with one of the third and fourth verification points.
3. The method of claim 1, wherein calculating a first strain amount based on the first initial length and the first strain length, and calculating a second strain amount based on the second initial length and the second strain length comprises:
ΔL1＝(L2-L1)/L1，ΔL2＝(L4-L3)/L3；
Δ L1 is the first strain variable, L1 is the first initial length, L2 is the first strain length;
Δ L2 is the second strain amount, L3 is the second initial length, and L4 is the second strain length.
4. The method of claim 1, wherein determining whether the strain video control system of the waviness test sample meets requirements based on the set strain level, the first strain level, and the second strain level comprises:
if the first strain variable is not larger than the second strain variable, judging whether the first strain variable meets a first preset condition, if so, judging that the strain video control system of the waviness test sample meets the requirement, otherwise, judging that the strain video control system of the waviness test sample does not meet the requirement;
if the first strain quantity is larger than the second strain quantity, whether the second strain quantity meets a second preset condition is judged, if yes, the strain video control system of the waviness test sample is judged to meet the requirement, and if not, the strain video control system of the waviness test sample is judged to not meet the requirement.
5. The method for rapidly verifying the strain video control system of the waviness test specimen of claim 4, wherein the first predetermined condition is: (Δ L1- α)/α < β; the second preset condition is as follows: (Δ L2- α)/α < β;
Δ L1 is the first dependent variable, Δ L2 is the second dependent variable, α is the set dependent variable, and β is a set deviation threshold.
6. The method for rapidly verifying the strain video control system of the waviness test specimen of claim 5, wherein β is 5%.
7. The utility model provides a quick verifying attachment of waviness test sample video control system that meets an emergency, its characterized in that includes:
the calibration point setting module is used for setting identification points on the surface of a strain area of a waviness test sample, and selecting a first calibration point, a second calibration point, a third calibration point and a fourth calibration point from the identification points, wherein a connecting line of the first calibration point and the second calibration point is perpendicular to and intersects with a connecting line of the third calibration point and the fourth calibration point;
the length measuring module is used for measuring the distance between the first check point and the second check point and recording the distance as a first initial length, and measuring the distance between the third check point and the fourth check point and recording the distance as a second initial length;
the stamping control module is used for setting the first check point, the second check point, the third check point and the fourth check point as tracking points of the strain video control system of the waviness test sample, and controlling the testing machine to stamp a strain area of the waviness test sample according to a set strain;
the length measuring module is further used for measuring the distance between the first check point and the second check point again and recording the distance as a first strain length after the punching is stopped, and measuring the distance between the third check point and the fourth check point again and recording the distance as a second strain length;
the strain calculation module is used for calculating a first strain according to the first initial length and the first strain length and calculating a second strain according to the second initial length and the second strain length;
and the judging module is used for judging whether the strain video control system of the waviness test sample meets the requirements or not according to the set strain, the first strain and the second strain.
8. The fast verification apparatus for a waviness test specimen strain video control system of claim 7, wherein one of the first and second verification points coincides with one of the third and fourth verification points.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of fast verification of a waviness test sample strain video control system of any one of claims 1 to 6 when executing the program.
10. A computer readable storage medium, wherein the computer readable storage medium when executed implements the method for fast verification of a waviness test specimen strain video control system of any of claims 1 to 6.
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