Integrated video extensometer

Abstract

The utility model provides an integrated video extensometer, and belongs to the technical field of marking positioning devices. The extensometer comprises a camera used for capturing the displacement of a test sample under stress; the distance measuring module is used for measuring the distance between the integrated video extensometer and the test sample; the temperature measuring module is used for measuring the environment temperature of the test sample; the analog-to-digital converter is connected with the camera, the distance measuring module and the temperature measuring module; the light module is used as a light source to irradiate the test sample; the camera, the temperature measuring module, the distance measuring module and the analog-to-digital converter are all arranged in the shell, and the light module is arranged outside the shell and movably connected with the shell. According to the utility model, the temperature measuring module is added in the video extensometer, and the environment temperature parameter is included in the analysis range of the deformation of the test sample, so that the measurement is more accurate. Meanwhile, the camera, the temperature measurement module, the distance measurement module, the analog-to-digital converter and the like are installed in the shell, so that the integrity of the video extensometer is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of marking positioning devices, in particular to an integrated video extensometer. Background Art

[0002] During the testing process of materials such as tensile or compressive testing, it is necessary to collect the deformation data of the materials when they are subjected to external forces, and then improve the performance of the materials based on this data, or provide a basis for material selection. Traditionally, mechanical extensometers are often used to obtain material deformation data. Due to the disadvantages of low precision and susceptibility to environmental factors in mechanical extensometers, non-contact extensometers, especially video extensometers, are now commonly used.

[0003] Existing video extensometers often appear as a testing system. Before testing a test sample, the testing system must first be installed.

[0004] Existing video extensometers are relatively complex to operate and inconvenient to use. Moreover, existing video extensometers ignore the influence of the environmental temperature of the test sample, collect fewer parameters, and it is difficult to provide an accurate parameter basis for the analysis of the deformation amount by the data analysis module. Summary of the Utility Model

[0005] An object of the utility model is to solve the problems existing in the prior art that video extensometers are inconvenient to use and cannot collect the environmental temperature data of test samples.

[0006] In particular, the embodiments of the present application provide an integrated video extensometer, including:

[0007] A camera for capturing the local displacement of a test sample during the force application process;

[0008] A ranging module for measuring the distance between the integrated video extensometer and the test sample;

[0009] A temperature measurement module for measuring the environmental temperature of the test sample;

[0010] An analog-to-digital converter connected to the camera, the ranging module, and the temperature measurement module for converting the analog signals collected by the camera, the ranging module, and the temperature measurement module into digital signals and sending the digital signals to an external data analysis module for data analysis and processing;

[0011] A lighting module for irradiating the test sample as a light source; and

[0012] A housing, wherein the camera, the temperature measurement module, the ranging module, and the analog-to-digital converter are all arranged inside the housing, and the lighting module is arranged outside the housing and is movably connected to the housing.

[0013] Further, the lighting module is hinged to the housing.

[0014] Further, the distance measuring module includes a laser emitter for emitting laser and a laser receiver for receiving the laser reflected back by the test sample.

[0015] Further, the lighting module is a blue LED lamp.

[0016] Further, the housing is provided with a heat dissipation grille.

[0017] Further, a parameter display screen is provided on the housing, which can display the temperature parameter collected by the temperature measuring module and the distance parameter collected by the distance measuring module.

[0018] Further, it further includes a light shield connected to the housing through a torque hinge and used for shielding the camera from ambient light.

[0019] Further, the light shield includes a first light shield and a second light shield distributed on both sides of the camera along the height direction of the housing. When the first light shield and the second light shield are folded towards each other to a first position parallel to the lens of the camera, the first light shield and the second light shield completely cover the camera.

[0020] Further, the first light shield is located above the lens of the camera, and when the first light shield is in the first position, the overlapping area with the lens of the camera is greater than a preset value;

[0021] One of the first light shield and the second light shield is provided with a groove for accommodating the other in the first position.

[0022] Further, an anti-reflection film is attached to the surface of the lens of the camera located outside the housing.

[0023] The beneficial effects of the present utility model are as follows:

[0024] 1. By adding a temperature measuring module to the video extensometer and incorporating the ambient temperature parameter into the analysis range of the deformation of the test sample, the measurement is made more accurate. At the same time, installing the camera, temperature measuring module, distance measuring module, analog-to-digital converter, etc. in the housing enhances the integrity of the video extensometer.

[0025] 2. By installing a light shield covering the camera lens on the housing, the influence of ambient light on the camera in the video extensometer is avoided, making the presentation clearer.

[0026] 3. By setting a distance measuring module in the video extensometer, it is convenient to determine the relative position between the test sample and the video extensometer after moving the video extensometer. Description of the Drawings

[0027] Figure 1 Stereogram of an integrated video extensometer according to an embodiment of the present utility model;

[0028] Figure 2 Front view of a light-shielding plate covering a camera lens according to an embodiment of the present utility model;

[0029] Figure 3 Schematic diagram of a first light-shielding plate and a second light-shielding plate according to an embodiment of the present utility model.

[0030] In the figure:

[0031] 1 - Camera; 2 - Distance measurement module; 21 - Laser emitter; 22 - Laser receiver; 3 - Temperature measurement module; 4 - Lighting module; 5 - Housing; 6 - Heat dissipation grille; 7 - Parameter display screen; 8 - Torque hinge; 9 - Light-shielding plate; 91 - First light-shielding plate; 92 - Second light-shielding plate; 10 - Groove. Detailed implementation manners

[0032] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, rather than limiting the present application. Additionally, it should be noted that for the convenience of description, only the parts related to the present application are shown in the drawings, rather than all the structures. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0033] The terms "including" and "having" and any variations thereof in the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0034] Referring to "embodiments" herein means that specific features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0035] As Figure 1As shown in the figure, the integrated video extensometer of the present utility model includes a camera 1, a ranging module 2, a temperature measurement module 3, an analog-to-digital converter (not shown), a lighting module 4, and a housing 5. The camera 1 is used to capture the local displacement of the test sample during the force application process. The ranging module 2 is used to measure the distance between the integrated video extensometer and the test sample. After moving the extensometer, through the ranging module 3, it is convenient to determine the relative position between the test sample and the video extensometer. The temperature measurement module 3 is used to measure the ambient temperature of the test sample. The analog-to-digital converter is connected to the camera 1, the ranging module 2, and the temperature measurement module 3, and is used to convert the analog signals collected by the camera 1, the ranging module 2, and the temperature measurement module 3 into digital signals, and send the digital signals to an external data analysis module for data analysis and processing. The lighting module 4 is used as a light source to irradiate the test sample, so that the camera 1 can capture the details of the deformation of the test sample. The camera 1, the temperature measurement module 3, the ranging module 2, and the analog-to-digital converter are all arranged inside the housing 5, so that the video extensometer is integrally formed, avoiding installation during use. The lighting module 4 is arranged outside the housing 5 and is movably connected to the housing 5. As Figure 2 shown, the lighting module 4 is connected to the housing 5 through a hinge, and the angle adjustment of the lamp tube module on the housing 5 is realized through the hinge. Other connection methods that can realize angle adjustment after the lighting module 4 is connected to the housing 5 all fall within the protection scope of the present utility model.

[0036] By adding the temperature measurement module 3 to the video extensometer and including the ambient temperature of the test sample in the analysis scope, the accuracy of the test is enhanced. At the same time, installing the camera 1, the temperature measurement module 3, the ranging module 2, and the analog-to-digital converter in the housing 5 enhances the integrity of the video extensometer.

[0037] As Figure 1 shown, in one embodiment, the ranging module 2 is a laser module, including a laser emitter 21 for emitting laser and a laser receiver 22 for receiving the laser reflected back by the test sample. In other embodiments, other methods such as infrared ranging and microwave ranging can also be used, which will not be elaborated here.

[0038] In order to ensure that the deformation of the test sample can be more easily captured, in one embodiment, the lighting module 4 is a blue LED lamp. In other embodiments, other monochromatic light sources can also be used.

[0039] Since a large amount of heat is generated when the video extensometer is working, to ensure the safety of using the video extensometer, as Figure 1 shown, a heat dissipation grille 6 is provided on the housing 5. A heat dissipation fan can also be added to further enhance the heat dissipation function of the video extensometer.

[0040] In one embodiment, a parameter display screen 7 for displaying the temperature parameters collected by the temperature measurement module 3 and the distance parameters collected by the distance measurement module 2 is provided on the housing 5, facilitating the measurement personnel to master the various data of the test process.

[0041] As Figure 2 shown, during the use of the video extensometer, it is prone to be affected by ambient light, resulting in the camera of the video extensometer being unable to accurately obtain the deformation image. To avoid the influence of ambient light on the acquisition of the deformation process by the camera 1, in one embodiment, the video extensometer further includes a light shield 9 connected to the housing 5 through a torque hinge 8 to shield the ambient light for the camera 1. Through the torque hinge 8, the light shield 9 can be fixed at any angle while being adjustable at any angle to adapt to the light at different light angles. Since the light shield 9 can be adjusted by 180 degrees along the torque hinge 8, when the video extensometer is not in use, the light shield 9 can be used to shield the lens of the camera 1 to prevent dust from falling into the lens.

[0042] In one embodiment, the light shield 9 includes a first light shield 91 and a second light shield 92 distributed on both sides of the camera 1 along the height direction of the housing 5. When the first light shield 91 and the second light shield 92 are folded towards each other to the first position parallel to the lens of the camera 1, the first light shield 91 and the second light shield 92 completely cover the camera 1. This prevents dust from falling into the camera 1 and affecting the performance of the camera 1.

[0043] To further improve the ability of the light shield 9 to block dust and prevent dust from falling into the lens through the gaps of the light shield 9. In one embodiment, the first light shield 91 is located above the lens of the camera 1, and when the first light shield 91 is in the first position, the overlapping area with the lens of the camera 1 is greater than a preset value, for example, the overlapping area accounts for more than 50% of the lens area. As Figure 3 shown, one of the first light shield 91 and the second light shield 92 is provided with a groove 10 for accommodating the other when in the first position. Through the overlap between the first light shield 91 and the second light shield 91, dust is prevented from entering the camera 1 through the gap. At the same time, the thickness of the first light shield 91 can be set to be less than or equal to the depth of the groove 10, so that when the first light shield 91 and the second light shield 92 overlap, the overlapping area is flat with the camera lens. In one embodiment, the first light shield 91 includes a square plate and a bow-shaped plate. The side of the outer contour of the bow-shaped plate that is a straight line is connected to the square plate, and the second light shield 92 is provided with a bow-shaped groove that matches the bow-shaped plate. When the first light shield 91 and the second light shield 92 move towards each other to the first position, the bow-shaped plate falls into the bow-shaped groove.

[0044] In one embodiment, an antireflection film is attached to the surface of the lens of the camera 1 on the outer side of the housing 5. By setting the antireflection film, the light transmittance of the lens of the camera 1 can be improved and reflection can be reduced.

[0045] The embodiments described above merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. An integrated video extensometer, characterized in that: include: A camera is used to capture the local displacement of the test sample during the force application process; A distance measuring module, used for measuring the distance between the integrated video extensometer and the test sample; Temperature measurement module, used to measure the ambient temperature of the test sample; An analog-to-digital converter, connected to the camera, the distance measuring module, and the temperature measuring module, for converting the analog signals collected by the camera, the distance measuring module, and the temperature measuring module into digital signals, and sending the digital signals to an external data analysis module for data analysis and processing; A light module, which serves as a light source to illuminate the test sample; and The camera, the temperature measurement module, the distance measurement module and the analog-to-digital converter are all arranged inside the shell, and the lighting module is arranged outside the shell and movably connected to the shell.

2. The integrated video extensometer according to claim 1, characterized in that: The lighting module is hinged to the housing.

3. The integrated video extensometer according to claim 1, characterized in that: The distance measuring module includes a laser transmitter for emitting laser light and a laser receiver for receiving the laser light reflected by the test sample.

4. The integrated video extensometer according to claim 1, characterized in that: The lighting module is a blue LED light.

5. The integrated video extensometer according to any one of claims 1 to 4, characterized in that: The shell is provided with a heat dissipation grille.

6. The integrated video extensometer according to claim 1, characterized in that: The shell is provided with a parameter display screen which can display the temperature parameters collected by the temperature measurement module and the distance parameters collected by the distance measurement module.

7. The integrated video extensometer according to claim 1, characterized in that: Also included is a light shielding plate connected to the housing via a torque hinge to shield the camera from ambient light.

8. The integrated video extensometer according to claim 7, characterized in that: The shading plate includes a first shading plate and a second shading plate distributed on both sides of the camera along the height direction of the shell. When the first shading plate and the second shading plate are folded toward each other to a first position parallel to the lens of the camera, the first shading plate and the second shading plate completely cover the camera.

9. The integrated video extensometer according to claim 8, characterized in that: The first shading plate is located on the upper side of the camera lens, and when the first shading plate is located at the first position, the overlapping area with the camera lens is greater than a preset value; One of the first shading plate and the second shading plate is provided with a groove for accommodating the other one when in the first position.

10. The integrated video extensometer according to claim 1, characterized in that: An anti-reflection film is attached to one side of the camera lens located outside the shell.

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