Optical extensometer with variable scale distance

Abstract

The utility model discloses a variable scale distance optical extensometer, and relates to the technical field of optical extensometers, the variable scale distance optical extensometer is provided with a connecting frame, a radiating fin, a measuring assembly, a variable distance driving assembly and an observation window, and the whole device can be placed at a specified position through the connecting frame on the outer side of the optical extensometer. The measuring assembly can be driven to move by opening the variable-pitch driving assembly, so that the position of the measuring assembly in the optical extensometer body is changed into a measuring distance, the optical extensometer is small and exquisite in overall structure, the measuring assembly can be operated to move and measure by opening the control button in the operation process, and both operation and measurement are very convenient. And the optical extensometer does not need to be moved, so that the situation of inaccurate measurement accuracy caused by position change is reduced, and the measurement result is more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of optical extensometers, in particular to an optical extensometer with a variable gauge length. Background Art

[0002] At present, the optical extensometer uses a non-contact high-precision camera to collect material deformation and then perform data analysis. It is a strain measurement device. With the continuous development of optical extensometers, an optical extensometer with a variable gauge length has been produced with higher measurement accuracy.

[0003] For example, the utility model with patent number CN202322234945.7 discloses an optical extensometer with adjustable gauge length, which relates to the technical field of optical extensometers. The utility model includes a sample to be measured, four target points, a dual-mirror imaging device, an upper equilateral right-angle prism, a lower equilateral right-angle prism, an intermediate equilateral right-angle prism, an ordinary lens, a digital camera, and a computer image acquisition and processing module; the four target points are arranged on the sample to be measured, the sample to be measured is located in the dual-mirror imaging device, and the upper equilateral right-angle prism and the lower equilateral right-angle prism are respectively arranged at the upper and lower ends of the intermediate equilateral right-angle prism. The utility model fixes the upper and lower mirrors on the translation base respectively through mechanical design, and each translation base is connected to the two ends of the same positive and negative threaded screw. Rotating the screw in one direction can realize the synchronous approach of the two mirrors, and rotating in the opposite direction can realize the synchronous separation of the two mirrors, which can realize the flexible adjustment of the gauge length of the optical extensometer to meet the deformation test requirements of various scenarios;

[0004] The optical extensometer in this patent is not small and convenient enough, and requires manual coordination to adjust the measuring position during operation, which makes measurement inconvenient. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a variable gauge optical extensometer, which solves the problem that the optical extensometer is not convenient for measurement.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a variable gauge optical extensometer, comprising an optical extensometer body, a connecting frame is arranged at the rear side of the optical extensometer body, a wear-resistant strip is fixedly installed inside the connecting frame, evenly distributed heat dissipation fins are arranged on both sides of the optical extensometer body, a measuring component is arranged inside the optical extensometer body, a variable distance drive component is installed on the rear side of the optical extensometer body, a glass window is arranged on the surface of the optical extensometer body, a liquid crystal display is arranged on one side of the glass window, an observation window is arranged on the other side of the glass window, a scale is arranged on the surface of the observation window, a control module is arranged on the upper surface of the optical extensometer body, a control button is arranged on the control module, indicator lights are arranged on both sides of the control button, and an installation groove corresponding to the variable distance drive component is opened on the rear side of the optical extensometer body.

[0007] Preferably, the variable pitch drive assembly comprises a mounting frame, a motor is arranged at the bottom of the mounting frame, a driving gear is arranged at the output end of the motor, and a driven gear is arranged at the side of the driving gear.

[0008] Furthermore, the driving gear and the driven gear are meshingly connected, and a threaded rod is fixedly mounted on the upper end of the driven gear.

[0009] Furthermore, the measuring assembly includes a slide seat, a threaded hole is provided on the surface of the slide seat, and a common lens is installed on the surface of the slide seat.

[0010] Furthermore, a digital camera is arranged at the lower side of the ordinary lens, and indicator arrows are arranged at the outer sides of the ordinary lens and the digital camera.

[0011] Furthermore, the digital camera is arranged on the inner side of the glass window, and the indicating arrow is arranged on the inner side of the observation window.

[0012] Furthermore, a groove is provided on the surface of the optical extensometer body, and a slide groove corresponding to the slide seat is provided on the outer side of the groove.

[0013] Beneficial Effects

[0014] The utility model provides a variable gauge optical extensometer. Compared with the prior art, it has the following beneficial effects:

[0015] The variable gauge length optical extensometer is provided with a connecting frame, a heat dissipation fin, a measuring component, a variable-length driving component and an observation window. The entire device can be placed at a specified position through the connecting frame outside the optical extensometer. Turning on the variable-length driving component can drive the measuring component to move, thereby changing the position of the measuring component inside the optical extensometer body to change the measuring distance. The overall structure of the optical extensometer is compact. During operation, the measuring component can be operated to move and measure by turning on the control button. The operation and measurement are very convenient, and there is no need to move the optical extensometer, thereby reducing the inaccurate measurement accuracy caused by changing the position, and the measurement result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a disassembled diagram of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the variable pitch drive assembly in the utility model;

[0019] Figure 4 It is a rear view structural schematic diagram of the optical extensometer body in the utility model.

[0020] In the figure: 1. Optical extensometer body; 101. Groove; 102. Slide; 2. Connecting frame; 201. Wear-resistant strip; 3. Heat dissipation fin; 4. Measuring assembly; 401. Slide; 402. Ordinary lens; 403. Digital camera; 404. Indicator arrow; 5. Variable pitch drive assembly; 501. Mounting frame; 502. Motor; 503. Driving gear; 504. Driven gear; 505. Threaded rod; 6. LCD screen; 7. Observation window; 701. Scale; 8. Mounting slot; 9. Control module; 10. Control button; 11. Indicator light. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4The utility model provides a technical solution: a variable gauge optical extensometer, comprising an optical extensometer body 1, a connecting frame 2 is arranged at the rear side of the optical extensometer body 1, a wear-resistant strip 201 is fixedly installed inside the connecting frame 2, evenly distributed heat dissipation fins 3 are arranged on both sides of the optical extensometer body 1, a measuring component 4 is arranged inside the optical extensometer body 1, a variable pitch drive component 5 is installed at the rear side of the optical extensometer body 1, a glass window is arranged on the surface of the optical extensometer body 1, and the field of vision of the measuring component 4 is not blocked by the glass window, a liquid crystal display screen 6 is arranged on one side of the glass window, an observation window 7 is arranged on the other side of the glass window, and a scale 701 is arranged on the surface of the observation window 7, a control module 9 is arranged on the upper surface of the optical extensometer body 1, a control button 10 is arranged on the control module 9, and indicator lights 11 are arranged on both sides of the control button 10, and an installation slot 8 corresponding to the variable pitch drive component 5 is opened on the rear side of the optical extensometer body 1, the control button 10 is used to control the entire optical extensometer body 1, and the indicator light 11 can display whether the device is normal.

[0023] The variable pitch drive assembly 5 includes a mounting frame 501, a motor 502 is arranged at the bottom of the mounting frame 501, a driving gear 503 is arranged at the output end of the motor 502, a driven gear 504 is arranged on the side of the driving gear 503, the driving gear 503 and the driven gear 504 are meshed and connected, a threaded rod 505 is fixedly installed on the upper end of the driven gear 504, the motor 502 drives the driving gear 503 to rotate, thereby driving the driven gear 504 to rotate, and the driven gear 504 rotates to drive the threaded rod 505 to rotate, and the measuring assembly 4 includes a slide 401, a threaded hole is opened on the surface of the slide 401, and the slide 401 An ordinary lens 402 is installed on the surface, a digital camera 403 is arranged on the lower side of the ordinary lens 402, an indication arrow 404 is arranged on the outer side of the ordinary lens 402 and the digital camera 403, the digital camera 403 is arranged on the inner side of the glass window, and the indication arrow 404 is arranged on the inner side of the observation window 7. A groove 101 is opened on the surface of the optical extensometer body 1, and a slide groove 102 corresponding to the slide seat 401 is opened on the outer side of the groove 101. The threaded rod 505 rotates to drive the slide seat 401 to move arbitrarily along the direction of the mounting frame 501, which can change the positions of the ordinary lens 402 and the digital camera 403 to realize variable gauge length measurement.

[0024] When working, first place the entire optical extensometer body 1 at the specified position, then turn on the motor 502 in the variable pitch drive assembly 5, the motor 502 drives the active gear 503 to rotate, thereby driving the driven gear 504 to rotate, the driven gear 504 rotates to drive the threaded rod 505 to rotate, the threaded rod 505 rotates to drive the slide 401 to move arbitrarily along the direction of the mounting frame 501, thereby changing the positions of the ordinary lens 402 and the digital camera 403, changing the position of the measuring assembly 4 inside the optical extensometer body 1, changing to measure the distance, and realizing variable gauge length measurement. The optical extensometer has a compact overall structure, and the control button 10 can be turned on during operation to operate the measuring assembly 4 to move and measure, which is very convenient to operate and measure, and there is no need to move the optical extensometer, reducing the inaccurate measurement accuracy caused by changing the position, and the measurement result is more accurate.

[0025] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A variable gauge optical extensometer, comprising an optical extensometer body (1), characterized in that: A connecting frame (2) is arranged at the rear side of the optical extensometer body (1), and a wear-resistant strip (201) is fixedly installed inside the connecting frame (2). Evenly distributed heat dissipation fins (3) are arranged on both sides of the optical extensometer body (1). A measuring assembly (4) is arranged inside the optical extensometer body (1). A variable pitch drive assembly (5) is installed at the rear side of the optical extensometer body (1). A glass window is arranged on the surface of the optical extensometer body (1), and a liquid crystal display (6) is arranged on one side of the glass window. An observation window (7) is arranged on the other side of the glass window. A scale (701) is arranged on the surface of the observation window (7). A control module (9) is arranged on the upper surface of the optical extensometer body (1), and a control button (10) is arranged on the control module (9). Indicator lights (11) are arranged on both sides of the control button (10). A mounting groove (8) corresponding to the variable pitch drive assembly (5) is opened on the rear side of the optical extensometer body (1).

2. The variable gauge optical extensometer according to claim 1, characterized in that: The variable pitch drive assembly (5) comprises a mounting frame (501), a motor (502) is arranged at the bottom of the mounting frame (501), a driving gear (503) is arranged at the output end of the motor (502), and a driven gear (504) is arranged on the side of the driving gear (503).

3. The variable gauge optical extensometer according to claim 2, characterized in that: The driving gear (503) and the driven gear (504) are meshingly connected, and a threaded rod (505) is fixedly mounted on the upper end of the driven gear (504).

4. The variable gauge optical extensometer according to claim 3, characterized in that: The measuring assembly (4) comprises a slide seat (401), a threaded hole is provided on the surface of the slide seat (401), and a common lens (402) is mounted on the surface of the slide seat (401).

5. The variable gauge optical extensometer according to claim 4, characterized in that: A digital camera (403) is arranged at the lower side of the ordinary lens (402), and an indication arrow (404) is arranged at the outer side of the ordinary lens (402) and the digital camera (403).

6. The variable gauge optical extensometer according to claim 5, characterized in that: The digital camera (403) is arranged on the inner side of the glass window, and the indicating arrow (404) is arranged on the inner side of the observation window (7).

7. The variable gauge optical extensometer according to claim 6, characterized in that: A groove (101) is provided on the surface of the optical extensometer body (1), and a slide groove (102) corresponding to the slide seat (401) is provided on the outside of the groove (101).

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