High-precision inclination angle measuring device based on machine vision

Abstract

The utility model discloses a machine vision-based high-precision inclination angle measuring device, which comprises a mounting base and a sealing box, the sealing box is fixedly mounted on the upper surface of the mounting base, a level bubble device is bolted on the upper surface of the mounting base and positioned in the sealing box, and an industrial camera is fixedly mounted at the top end in the sealing box. An annular light supplementing lamp is fixedly arranged on the inner side wall of the sealing box, a control machine is bolted to the top end of the sealing box, and a baffle is inserted into one side of the sealing box. The whole leveling bubble device is placed on the upper surface of the mounting base, bubbles of the leveling bubble device are manually adjusted to the center through the horizontal adjusting assembly, the positions of the bubbles are recorded through the industrial camera, the relation between bubble displacement and the dip angle is established, the annular light supplementing lamp is turned on, images are collected through the industrial camera, and the dip angle is calculated through calibration data. And a data processing result is sent out through various interfaces by the control machine, so that the use of a high-precision gyroscope is avoided, and the cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of inclination angle measurement, in particular to a high-precision inclination angle measurement device based on machine vision. Background Art

[0002] Inclinometers, also known as angle meters and electronic angle meters, are commonly used to measure horizontal angles, relative angles, and inclination angles. Current inclination measuring instruments generally use the principle of Newton's second law. Within a system, the acceleration of an object is measured, and the velocity is calculated by integration, and then the linear displacement is calculated. The inclination angle of the object is calculated by displacement. The traditional inclinometer is an accelerometer, and this method of measuring the inclination angle of an object has limitations. When the object is in motion, the inclinometer cannot accurately calculate the dynamic inclination angle of the object. The current solution to the problem of dynamic inclination measurement is often to add a gyroscope for auxiliary measurement. High-precision gyroscopes are expensive and also have measurement accuracy problems; therefore, we need to propose a high-precision inclination measurement device based on machine vision. Summary of the invention

[0003] The purpose of the utility model is to provide a high-precision inclination measuring device based on machine vision, which solves the problems raised in the above-mentioned background technology by placing the whole device on the upper surface of a mounting base, manually adjusting the bubble of the level bubbler to the center through the horizontal adjustment component, recording the position of the bubble through an industrial camera and establishing the relationship between the bubble displacement and the inclination angle, and then turning on the annular fill light to collect images through the industrial camera.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision inclination angle measuring device based on machine vision, comprising a mounting base and a sealed box, wherein the sealed box is fixedly mounted on the upper surface of the mounting base, a level bubbler is bolted on the upper surface of the mounting base and located inside the sealed box, an industrial camera is fixedly mounted on the top of the sealed box, an annular fill light is fixedly arranged on the inner wall of the sealed box, a control machine is bolted on the top of the sealed box, and a baffle is plugged into one side of the sealed box;

[0005] A level adjustment component for leveling the mounting base is arranged on the side of the mounting base.

[0006] Preferably, the horizontal adjustment assembly includes adjusting screws and supporting nuts, and the adjusting screws and supporting nuts are each provided in three groups, the three groups of adjusting screws rotate through the mounting base, and the three groups of supporting nuts are threadedly sleeved on the outer arc surface of the adjusting screws, and the three groups of supporting nuts are all located on the lower surface of the mounting base.

[0007] Preferably, a pull ring is fixedly mounted on the upper surface of the baffle, snap-fitting protrusions and spring plungers are fixedly mounted on both sides of the baffle, and a baffle groove corresponding to the baffle is formed through the upper surface of the sealing box.

[0008] Preferably, the inner wall of the sealing box is provided with two groups of clamping grooves corresponding to the clamping protrusions, and the inner wall of the sealing box is provided with positioning holes corresponding to two groups of spring plungers.

[0009] Preferably, a connecting wire is provided at the top of the industrial camera, and the other end of the connecting wire is electrically connected to the control machine, a bolting plate is fixedly connected to the upper surface of the industrial camera, and a bolting hole corresponding to the bolting plate is opened on the upper surface of the sealing box.

[0010] Preferably, a connecting block is fixedly mounted on the outer arc surface of the annular fill light, and the connecting block is fixedly connected to the inner wall of the sealing box, and an observation window is opened on the side of the sealing box.

[0011] Preferably, the center points of the level bubble device, the industrial camera and the annular fill light are located on the same vertical line, and the bottom end of the industrial camera and the bottom end of the annular fill light are located on the same horizontal line.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model places the whole on the upper surface of the installation base, manually adjusts the bubble of the level bubbler to the center through the horizontal adjustment component, records the position of the bubble through an industrial camera and establishes the relationship between the bubble displacement and the inclination angle, turns on the annular fill light to collect images through the industrial camera, calculates the inclination angle through calibration data, and sends the data processing results through various interfaces through a control computer, thus avoiding the use of a high-precision gyroscope and greatly reducing costs.

[0014] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the invention. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a cross-sectional view of the sealing box of the utility model;

[0017] Figure 3 This is an exploded view of the baffle of the utility model;

[0018] Figure 4 For this utility model Figure 3 Enlarged view of point A in the middle.

[0019] In the figure: 1. Mounting base; 2. Adjusting screw; 3. Support nut; 4. Baffle; 5. Sealing box; 6. Bolting plate; 7. Connecting wire; 8. Control machine; 9. Observation window; 10. Level bubbler; 11. Industrial camera; 12. Ring fill light; 13. Connecting block; 14. Pull ring; 16. Bolting hole; 17. Snap-in protrusion; 18. Spring plunger; 19. Snap-in groove; 20. Baffle groove. DETAILED DESCRIPTION

[0020] 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.

[0021] The utility model provides: a high-precision inclination angle measuring device based on machine vision, such as Figure 1-4 As shown, it includes a mounting base 1 and a sealing box 5, the sealing box 5 is fixedly mounted on the upper surface of the mounting base 1, a level bubbler 10 is bolted on the upper surface of the mounting base 1 and located inside the sealing box 5, an industrial camera 11 is fixedly mounted on the top of the sealing box 5, a ring fill light 12 is fixedly arranged on the inner wall of the sealing box 5, a control machine 8 is bolted on the top of the sealing box 5, and a baffle 4 is plugged into one side of the sealing box 5;

[0022] A level adjustment component for leveling the mounting base 1 is provided on the side of the mounting base 1, and the level bubble device 10 includes both a circular universal level bubble device and a strip level bubble device. The universal level bubble device can measure the horizontal X-axis and Y-axis directions at the same time, while the strip level bubble device can only measure the single-axis direction. In order to achieve high dynamic performance, the industrial camera 11 will use a high frame rate to capture images, use a machine vision algorithm, quickly identify bubbles, and accurately calculate the center position of the bubbles.

[0023] Preferably, the horizontal adjustment component includes an adjusting screw 2 and a supporting nut 3, and the adjusting screw 2 and the supporting nut 3 are provided with three groups, the three groups of adjusting screws 2 rotate and penetrate the mounting base 1, and the three groups of supporting nuts 3 are threadedly sleeved on the outer arc surface of the adjusting screw 2, and the three groups of supporting nuts 3 are all located on the lower surface of the mounting base 1. The device uses the horizontal adjustment component to calibrate and calibrate the mounting base 1, and the mounting base 1 can adjust the height of the three groups of supporting nuts 3 to level the mounting base 1. During the entire calibration process, the centering of the bubble of the level bubbler 10 can be checked through the observation window 9. The three groups of adjusting screws 2 are fixedly installed on the bottom plate, and the supporting nuts 3 are moved up and down along the adjusting screws 2 by rotating the supporting nuts 3, and the supporting nuts 3 move up and down to drive the mounting base 1 to change the angle, and the calibration and calibration process is completed by continuously fine-tuning and leveling the supporting nuts 3.

[0024] Furthermore, a pull ring 14 is fixedly installed on the upper surface of the baffle 4, and snap-in protrusions 17 and spring plungers 18 are fixedly installed on both sides of the baffle 4. A baffle groove 20 corresponding to the baffle 4 is opened through the upper surface of the sealing box 5. When it is necessary to adjust the internal device of the sealing box 5, the baffle 4 can be pulled out from the baffle groove 20 by operating the pull ring 14, so that the internal equipment of the sealing box 5 can be adjusted.

[0025] Furthermore, the inner wall of the sealing box 5 is provided with two groups of snap-in grooves 19 corresponding to the snap-in protrusions 17, and the inner wall of the sealing box 5 is provided with positioning holes corresponding to the two groups of spring plungers 18. The snap-in protrusions 17 are snapped into the snap-in grooves 19 to limit the baffle 4 to prevent the baffle 4 from shaking, and when the baffle 4 reaches the bottom, the spring plunger 18 will be snapped into the corresponding positioning hole, thereby limiting the baffle 4 to prevent the baffle 4 from shifting when the device is running, and rubber sealing strips are provided on the sides of the baffle 4 to prevent moisture from entering the inside of the sealing box 5 from the sides of the baffle 4.

[0026] It is worth mentioning that a connecting line 7 is provided at the top of the industrial camera 11, and the other end of the connecting line 7 is electrically connected to the control machine 8. A bolting plate 6 is fixedly connected to the upper surface of the industrial camera 11, and a bolting hole 16 corresponding to the bolting plate 6 is opened on the upper surface of the sealing box 5. The image taken by the industrial camera 11 is transmitted to the control machine 8 through the connecting line 7, and a plurality of groups of interfaces are provided on the side of the control machine 8. The data is transmitted to the host computer or the remote data center through the serial port, network port, Bluetooth, wifi, radio station, etc., and the industrial camera 11 is fixed to the inside of the bolting hole 16 by bolting the bolting plate 6.

[0027] Specifically, a connecting block 13 is fixedly installed on the outer arc surface of the annular fill light 12, and the connecting block 13 is fixedly connected to the inner wall of the sealed box 5. An observation window 9 is opened on the side of the sealed box 5. The annular fill light 12 is fixed to the inside of the sealed box 5 through the connecting block 13. The imaging effect is guaranteed by setting the annular fill light 12 for fill light.

[0028] In addition, the center points of the level bubble 10, the industrial camera 11 and the ring fill light 12 are located on the same vertical line, and the bottom ends of the industrial camera 11 and the ring fill light 12 are located on the same horizontal line. The level bubble 10 and the industrial camera 11 maintain the same center point to ensure that the shooting angle will not be tilted, and the bottom ends of the industrial camera 11 and the ring fill light 12 are located on the same horizontal plane, thereby preventing the ring fill light 12 from directly irradiating the lens of the industrial camera 11 and causing a decrease in the shooting effect of the industrial camera 11.

[0029] Working principle: Place the whole on the upper surface of the mounting base 1, and then manually adjust the bubble of the level bubbler 10 to the center through the horizontal adjustment component, and then use the industrial camera 11 to record the position of the bubble and establish the relationship between the bubble displacement and the inclination angle, and then turn on the annular fill light 12 to collect images through the industrial camera 11, expose the industrial camera 11 to the optimal exposure, and then collect images at a high frame rate, high-speed image processing, identify bubbles and calculate their center position, calculate the inclination angle in combination with the calibration data, and then send the data processing results through various interfaces through the control machine 8.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision inclination angle measuring device based on machine vision, characterized in that: The invention comprises: a mounting base (1) and a sealing box (5), wherein the sealing box (5) is fixedly mounted on the upper surface of the mounting base (1), a level bubbler (10) is bolted to the upper surface of the mounting base (1) and located inside the sealing box (5), an industrial camera (11) is fixedly mounted on the top of the sealing box (5), an annular fill light (12) is fixedly arranged on the inner wall of the sealing box (5), a control machine (8) is bolted to the top of the sealing box (5), and a baffle (4) is plugged into one side of the sealing box (5); A level adjustment component for leveling the mounting base (1) is provided on the side of the mounting base (1).

2. The high-precision inclination angle measuring device based on machine vision according to claim 1 is characterized in that: The horizontal adjustment assembly comprises an adjustment screw (2) and a support nut (3), and the adjustment screw (2) and the support nut (3) are each provided in three groups, the three groups of the adjustment screw (2) being rotatably inserted through the mounting base (1), and the three groups of the support nuts (3) being threadedly sleeved on the outer arc surface of the adjustment screw (2), and the three groups of the support nuts (3) being all located on the lower surface of the mounting base (1).

3. The high-precision inclination angle measuring device based on machine vision according to claim 1 is characterized in that: A pull ring (14) is fixedly mounted on the upper surface of the baffle (4), a clamping protrusion (17) and a spring plunger (18) are fixedly mounted on both sides of the baffle (4), and a baffle groove (20) corresponding to the baffle (4) is formed through the upper surface of the sealing box (5).

4. The high-precision inclination angle measuring device based on machine vision according to claim 3 is characterized in that: The inner wall of the sealing box (5) is provided with two groups of clamping grooves (19) corresponding to the clamping protrusions (17), and the inner wall of the sealing box (5) is provided with positioning holes corresponding to the two groups of spring plungers (18).

5. The high-precision inclination angle measuring device based on machine vision according to claim 1 is characterized in that: A connecting wire (7) is provided at the top of the industrial camera (11), and the other end of the connecting wire (7) is electrically connected to a control machine (8); a bolting plate (6) is fixedly connected to the upper surface of the industrial camera (11), and a bolting hole (16) corresponding to the bolting plate (6) is opened on the upper surface of the sealing box (5).

6. The high-precision inclination angle measuring device based on machine vision according to claim 1, characterized in that: A connecting block (13) is fixedly mounted on the outer arc surface of the annular fill light (12), and the connecting block (13) is fixedly connected to the inner wall of the sealing box (5), and an observation window (9) is provided on the side of the sealing box (5).

7. The high-precision inclination angle measuring device based on machine vision according to claim 1 is characterized in that: The center points of the level bubble device (10), the industrial camera (11) and the annular fill light (12) are located on the same vertical line, and the bottom end of the industrial camera (11) and the bottom end of the annular fill light (12) are located on the same horizontal line.

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