Glass floating meter reading device

Abstract

The utility model discloses a reading device for a glass floating meter, which comprises a solution cylinder, a cavity for accommodating solution is arranged in the solution cylinder, an upper cover is arranged at the top of the solution cylinder, and a circular limiting hole for the glass floating meter to be inserted into the cavity is arranged on the upper cover. According to the utility model, through the automatic image acquisition device and the manipulator clamping mechanism, when the glass floating meter is stabilized in a solution, the glass floating meter can be quickly positioned to a liquid level reading position through the camera, scale numbers of the glass floating meter at the liquid level can be obtained, and when the scale numbers cannot be obtained, the glass floating meter can be accurately positioned. According to the invention, rapid and accurate rotation adjustment can be carried out through the manipulator until scale numbers are clearly identified, the scale line closest to the liquid level is identified through the scale numbers and the liquid level position, and a reading value accurate to a digit after a decimal point is calculated, so that compared with a mode of directly reading the scales by naked eyes, the reading information identification is faster and more accurate, and the reading efficiency is improved. And the readable precision is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of glass float meter calibration and relates to a glass float meter reading device. Background Art

[0002] Glass float meter, also known as hydrometer, density meter, concentration meter, is made based on gravity and the force balance of objects when floating and Archimedes principle. It is used to measure the specific gravity of various fluids, semi-fluids or mixtures, or to measure the percentage concentration of solutions or mixtures.

[0003] After the glass float is produced, it needs to be calibrated in accordance with the JJG 42-2023 "Calibration Procedure for Working Glass Float" formulated by the state. It can only be put into use after passing the calibration. The reading of the glass float during the calibration process is an important step. The existing reading method of the glass float is still the mainstream method of direct reading with the naked eye. This method has great limitations and strict specifications for reading. Manual readings are highly dependent on the professional quality of the person measuring. Under the influence of various factors such as solution temperature, solution storage time, and the concentration of the person measuring, the accuracy and efficiency of manual readings are low, resulting in a long calibration cycle for existing glass float products, which causes troubles and impacts on the inspection of inspection agencies and the production activities of enterprises. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a glass float meter reading device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A glass float reading device comprises a solution cylinder having a cavity for accommodating a solution, an upper cover is arranged on the top of the solution cylinder, and a circular limiting hole is arranged on the upper cover for inserting a glass float into the cavity; a first camera and a second camera are arranged on one side of the solution cylinder, and the first camera and the second camera are both arranged facing the solution cylinder.

[0007] Furthermore, a multi-axis manipulator clamping mechanism is arranged above the solution cylinder, and the multi-axis manipulator clamping mechanism includes a transversely arranged transverse rail, a lifting rail is vertically slidably arranged on the transverse rail, a rotating motor is slidably arranged on the lifting rail, and a main clamping jaw for clamping the glass float is connected to the output shaft of the rotating motor.

[0008] Furthermore, it also includes a secondary clamping jaw for clamping the thick end of the glass float, and the secondary clamping jaw is arranged on the lifting rail.

[0009] Furthermore, an overflow port for the internal solution to flow out is arranged on the peripheral wall of the solution cylinder.

[0010] Furthermore, it also includes a liquid receiving trough, which is arranged below the overflow port, the liquid receiving trough is inclined, and the lower end of the liquid receiving trough is connected to a waste liquid bucket.

[0011] Furthermore, it also includes a light source, which includes a background light source and a ring light source respectively arranged on both sides of the solution cylinder.

[0012] Furthermore, the solution cylinder is made of transparent material.

[0013] In summary, the utility model is beneficial in that:

[0014] The utility model uses an automated image acquisition device and a manipulator clamping mechanism. When the glass float is stable in the solution, the camera can be used to quickly locate the liquid level reading position and obtain the scale numbers of the glass float at the liquid level. When the scale numbers cannot be obtained, the manipulator can be used to quickly and accurately perform rotation adjustments until the scale numbers are clearly identified. The scale line closest to the liquid surface is identified through the scale numbers and the liquid level position, and the reading value is calculated to the decimal point. Compared with the method of directly reading the scale with the naked eye, the reading information can be recognized faster and more accurately, and the readability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the structure of the automatic reading device of the glass float meter.

[0016] Figure 2 for Figure 1 Schematic diagram of the structure from another perspective.

[0017] Markings in the figure: 11, solution cylinder; 12, limit hole; 13, overflow port; 14, liquid receiving tank; 15, waste liquid bucket; 21, first camera; 22, second camera; 23, slide rail; 31, transverse rail; 32, lifting rail; 33, main clamp; 34, rotating motor; 35, auxiliary clamp; 4, light source. DETAILED DESCRIPTION

[0018] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0019] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0020] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0021] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the vertical relationship may actually be an approximately vertical relationship.

[0022] The utility model provides an automatic reading device for a glass float gauge, which replaces the traditional manual reading method and realizes automatic reading of the liquid level of the glass float gauge after it is immersed in a solution through a manipulator mechanism in cooperation with an image acquisition device.

[0023] The glass float meter described in the utility model, namely the hydrometer, has two sides respectively comprising a thick end for immersing in liquid and a thin end for setting a scale mark.

[0024] The scale includes a plurality of scale lines neatly arranged along the axis of the thin end, and digital markings arranged on the sides of some of the scale lines. The numbers represent the reading values ​​of the scale lines at the corresponding positions. When the glass float is immersed in the solution, the reading of the liquid level position can be obtained by identifying the numbers closest to the liquid level position and the corresponding scale line through distance conversion.

[0025] Reference Figure 1 and Figure 2 The automated reading device includes a solution cylinder 11, a multi-axis manipulator clamping mechanism, and an image acquisition device.

[0026] The solution cylinder 11 is a vertical columnar hollow structure, and is used to contain solution inside. An overflow port 13 is provided on the top of the peripheral side of the solution cylinder 11 for the solution inside the solution cylinder 11 to flow out. The overflow port 13 in this embodiment is provided to control the highest liquid level in the solution cylinder 11 at the height of the overflow port 13.

[0027] A liquid receiving tank 14 is also provided at the rear side of the solution cylinder 11 to receive the liquid flowing out of the overflow port 13 . The liquid receiving tank 14 is tilted and connected to a waste liquid bucket 15 at the lower end to recover the waste liquid.

[0028] The solution cylinder 11 is made of transparent material, including but not limited to plastic or glass, and the internal solution level and the glass float can be directly observed through the side wall.

[0029] An upper cover is provided on the top of the solution cylinder 11, and a circular limiting hole 12 is opened in the middle of the upper cover. The limiting hole 12 can allow a single glass float to pass through and be inserted into the solution cylinder 11. By providing the limiting hole 12, the glass float can be limited to the middle of the solution cylinder 11, which is more conducive to clear and accurate readings.

[0030] The multi-axis manipulator clamping mechanism includes a transverse rail 31 arranged laterally for the manipulator to move laterally, grab the glass float to move it to the top of the solution cylinder 11, or move it away from the top of the solution cylinder 11; includes a vertically arranged lifting rail 32 to realize the grabbing and lifting of the glass float, including the vertical placement of the glass float in the solution cylinder 11, the lifting rail 32 is slidably connected to the transverse rail 31, and can move laterally along the transverse rail 31; includes a clamp for performing a clamping function, the clamp is clamped at the top of the thin end of the glass float, the clamp is slidably connected to the lifting rail 32, can be lifted and lowered along the lifting rail 32, and move laterally on the transverse rail 31 together with the lifting rail 32.

[0031] The clamp includes a rotating motor 34 and two main clamping jaws 33 that are relatively opened and closed. The two main clamping jaws 33 are jointly arranged on the bottom output shaft of the rotating motor 34, and can rotate synchronously under the action of the rotating motor 34. When the clamp clamps the glass float, it can drive the glass float to rotate along its axial direction.

[0032] A secondary clamp 35 is also provided on the lower side of the multi-axis manipulator clamping mechanism. The secondary clamp 35 can be set on the lifting rail 32. In the process of the clamp clamping the glass float outside the solution cylinder 11 and moving it horizontally, the secondary clamp 35 is used to clamp the surrounding side of the thick end of the glass float to stabilize the glass float as a whole and prevent the glass float from shaking or swaying during movement and causing breakage at the thin end.

[0033] The image acquisition device is used to capture images of the interaction between the liquid surface and the glass float when the glass float is placed in the solution cylinder 11, and includes a first camera 21 and a second camera 22. The first camera 21 and the second camera 22 are both arranged on the same mobile platform, and the acquisition directions are both toward the solution cylinder 11. The mobile platform is arranged on a slide rail 23. The mobile platform can move laterally on the slide rail 23 to adjust the image acquisition viewing angle. At the same time, an angle adjustment structure is also arranged between the first camera 21 and / or the second camera 22 and the mobile platform to adjust the camera's orientation and inclination angle. The angle adjustment structure can adopt methods including but not limited to connecting the camera with the mobile platform by a damping shaft.

[0034] The first camera 21 is a wide-angle camera that captures a large range and is used to locate the actual position of the glass float and the solution surface, as well as to determine the posture of the entire glass float. The second camera 22 is a small-field-of-view camera that is used to capture high-definition images of the scale of the glass float and the position of the solution surface. The positioning of the first camera 21 facilitates the rapid determination of the collection position of the second camera 22.

[0035] In order to improve the image acquisition quality of the two cameras, a light source is further provided in the vertical cabinet 1, and the light source includes a background light source 4 and a ring light source.

[0036] Among them, the background light source 4 is arranged on the front side of the solution cylinder 11, and illuminates the solution cylinder 11 so that the solution cylinder 11 is located between the background light source 4 and the image acquisition device. The background light source 4 is set to a square LED panel. When the image is captured by the first camera 21, the captured image is mainly used to locate the position of the glass float and the liquid level. Therefore, using the back direction of the background light source 7 to illuminate can make the edge of the glass float and the liquid level position clearer.

[0037] The annular light source is arranged on the surrounding side of the second camera 22 and illuminates the solution cylinder 11. When the second camera 22 is used to collect images, the collected images are mainly used to identify the scale information on the glass float. The scale is facing the second camera 22, so the display of the scale can be clearer by illuminating the front direction with the annular light source; and when the annular light source is illuminated, the background light source 4 can be turned off, and its LED panel can serve as a clean background behind the solution cylinder when turned off.

[0038] When the automatic reading device is working, the glass float is placed into the solution cylinder 11 through the limiting hole 12 and left to stand for a period of time so that the glass float and the solution level are in a stable state. At this time, the first camera 21 is used to collect images of the entire solution cylinder 11 and the glass float, and the position of the liquid level in the image is obtained by machine or manual image processing and analysis, and the position of the top of the glass float scale in the field of view and the lateral position of the lower section of the scale liquid level in the field of view are located. Then, the second camera 22 is used to collect an enlarged image at the liquid level, and the liquid level reading position, the number of the glass float closest to the liquid level reading position and its position are obtained by machine or manual image processing and analysis, and then it is determined whether the arc surface of the glass float is a scale line arc surface at this time. When any of the above information cannot be recognized, the multi-axis manipulator clamping device can be controlled to clamp the glass float and rotate it by an angle, and the image is collected again. By rotating once or multiple times until all the above information can be recognized, the scale line closest to the liquid surface can be identified based on this information, and the current glass float reading indication can be calculated.

[0039] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A glass float reading device, characterized in that: The invention comprises a solution cylinder (11), wherein the solution cylinder (11) has a cavity for accommodating a solution, and an upper cover is provided on the top of the solution cylinder (11), and a circular limiting hole (12) is provided on the upper cover for inserting a glass float into the cavity; a first camera (21) and a second camera (22) are provided on one side of the solution cylinder (11), and the first camera (21) and the second camera (22) are both arranged toward the solution cylinder (11).

2. A glass float reading device according to claim 1, characterized in that: A multi-axis manipulator clamping mechanism is arranged above the solution cylinder (11), and the multi-axis manipulator clamping mechanism includes a transversely arranged transverse rail (31), a lifting rail (32) is vertically slidably arranged on the transverse rail (31), a rotating motor (34) is slidably arranged on the lifting rail (32), and a main clamping jaw (33) for clamping a glass float is connected to the output shaft of the rotating motor (34).

3. A glass float reading device according to claim 2, characterized in that: It also comprises a secondary clamping jaw (35) for clamping the thick end of the glass float, and the secondary clamping jaw (35) is arranged on the lifting rail (32).

4. A glass float reading device according to claim 1, characterized in that: The peripheral wall of the solution cylinder (11) is provided with an overflow port (13) for the internal solution to flow out.

5. A glass float reading device according to claim 4, characterized in that: It also comprises a liquid receiving trough (14), which is arranged below the overflow port (13), the liquid receiving trough (14) is arranged in an inclined manner, and the lower end of the liquid receiving trough (14) is connected to a waste liquid bucket (15).

6. A glass float meter reading device according to claim 1, characterized in that: It also comprises a light source, which comprises a background light source (4) and a ring light source respectively arranged on both sides of the solution cylinder (11).

7. A glass float meter reading device according to any one of claims 1 to 6, characterized in that: The solution cylinder (11) is made of transparent material.

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