CN216870295U

CN216870295U - Absorption performance tester based on machine vision

Info

Publication number: CN216870295U
Application number: CN202220337045.8U
Authority: CN
Inventors: 王平; 张小攀; 张涛
Original assignee: Suzhou Watch Technology Co ltd
Current assignee: Suzhou Watch Technology Co ltd
Priority date: 2022-02-20
Filing date: 2022-02-20
Publication date: 2022-07-01
Anticipated expiration: 2032-02-20

Abstract

The utility model discloses an absorption performance tester based on machine vision, which comprises a base, wherein a liquid storage disc is arranged on the base, a cross beam is arranged above the liquid storage disc, a plurality of clips are connected to the cross beam at intervals and used for fixing strip-shaped sheets to the cross beam, the cross beam is configured to move up and down along the vertical direction, a camera is arranged in front of the cross beam, the camera is configured to be started according to preset time after the cross beam moves downwards for a preset distance, and an image of the height of the strip-shaped sheets absorbing liquid is acquired.

Description

Absorption performance tester based on machine vision

Technical Field

The utility model relates to an absorption performance tester based on machine vision.

Background

The liquid absorption performance of an absorbent thin sheet is one of the most important indicators for evaluating the use function thereof, and the detection of the liquid absorption performance is particularly important when the absorbent thin sheet such as a tissue paper, a toilet paper, a wiping paper for a article, a water absorbing paper, a nonwoven fabric, a cotton soft towel, or the like is used in a wide range.

The liquid absorption speed of the absorbent sheet is the most common evaluation index of the liquid absorption performance of the sheet, at present, no special instrument for detecting the liquid absorption performance of the sheet exists, the existing liquid absorption speed of the absorbent sheet is detected by manually immersing the end part of a strip-shaped sheet cut to a preset width into liquid, timing by a stopwatch, manually measuring the liquid absorption height of the strip-shaped sheet by a ruler after a preset time, and further obtaining the liquid absorption speed of the sheet. The manual detection efficiency is low, the number of strip sheets detected at a time is not more than two, and the measurement error is easily generated, so that the accuracy of the sheet liquid absorption performance measurement result is low.

SUMMERY OF THE UTILITY MODEL

In view of the defects of the prior art, the utility model provides the absorption performance tester based on machine vision, which can automatically detect the liquid absorption performance of the sheet material and improve the detection efficiency and the result accuracy.

The technical scheme adopted by the utility model is as follows: an absorption performance tester based on machine vision comprises a base, wherein a liquid storage disc used for storing liquid to be absorbed is arranged on the base, a cross beam is arranged above the liquid storage disc, and a plurality of clips are connected to the cross beam at intervals and used for fixing strip-shaped sheets;

the cross beam is configured to move up and down along the vertical direction;

the camera is arranged in front of the beam and is configured to be started according to preset time after the beam moves downwards for a preset distance, and an image of the height of the liquid absorbed by the strip-shaped sheet is acquired.

Further, a hollow sleeve is arranged on the base in the vertical direction, an L-shaped connecting arm is connected in the hollow sleeve in a sliding mode, the cross beam is connected to the L-shaped connecting arm, the base further comprises a rotating handle which is fixed to a middle shaft provided with a cam, the bottom end of the L-shaped connecting arm abuts against the periphery of the cam, and when the rotating handle is rotated, the L-shaped connecting arm moves downwards or upwards in the hollow sleeve by the preset distance.

Further, a travel switch is mounted on the hollow sleeve, and when the L-shaped connecting arm moves downward for a predetermined distance relative to the hollow sleeve, the travel switch is turned on.

Furthermore, the travel switch is installed on the outer side of the hollow sleeve, a convex block is correspondingly arranged on the L-shaped connecting arm, and when the L-shaped connecting arm moves downwards for a preset distance relative to the hollow sleeve, the convex block downwards touches the travel switch, so that the travel switch is turned on.

Further, the absorption performance tester based on machine vision further comprises a timer, when the travel switch is started, the timer starts timing, and after the preset time, the camera acquires an image of the height of the strip-shaped sheet absorbing liquid.

Further, the camera is connected with a computer, and the camera acquires images of the height of the liquid absorbed by the strip-shaped sheets and transmits the images to the computer.

Furthermore, the cross beam is a steel beam, and a magnetic block is arranged on one side of the clamp close to the cross beam.

Furthermore, a rotating shaft is installed on the cross beam, the clamping buckle is connected with the rotating shaft, and the free end of the clamping buckle is bent towards one side far away from the cross beam.

Furthermore, a plurality of scales are vertically connected to the cross beam, two sides of each scale are respectively provided with one clamping buckle, and the bottom end of the strip-shaped sheet fixed on the cross beam is flush with the 0 scale mark of the scale.

Furthermore, the camera is connected to the hollow sleeve through a support frame, and the camera is arranged in the middle of the strip-shaped sheets.

Has the advantages that: compared with the existing manual detection of the liquid absorption performance of the sheet, the absorption performance tester based on the machine vision provided by the utility model is convenient and fast to detect, can automatically detect the liquid absorption performance of a plurality of strip-shaped thin absorbent sheets and give result feedback, and overcomes the defects of low efficiency and low accuracy of the existing manual detection.

Drawings

FIG. 1 is a schematic perspective view of a machine vision-based absorption tester according to an embodiment of the present invention;

FIG. 2 is a schematic view of the clip according to an embodiment of the present invention;

fig. 3 is a schematic view of the cam and the middle shaft connection.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the present invention more comprehensible to those skilled in the art, and will thus provide a clear and concise definition of the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The utility model provides an absorption performance tester based on machine vision, which is used for detecting the liquid absorption performance of an absorbent thin sheet.

Wherein, the thin absorbent sheet can be household paper (such as facial tissue, napkin, toilet paper, wiping paper for things, absorbent paper, etc.) or non-woven fabric products (such as makeup removing towel, cotton soft towel, etc.); the liquid absorption performance is water absorption performance or oil absorption performance and the like.

The absorbent sheet (hereinafter referred to as a "sheet") is cut into a strip shape having a predetermined width, and then the liquid-absorbent performance is detected.

Referring to fig. 1 to 3, fig. 1 shows a structure of the machine vision-based absorption performance tester according to an embodiment of the present invention, which includes a base 10, a liquid storage tray 20 disposed on the base 10, a cross beam 30 mounted above the liquid storage tray 20, and a plurality of clips 31 connected to the cross beam 30 at intervals, wherein the clips 31 are used for fixing strip-shaped sheets to the cross beam 30.

The liquid storage tray 20 is used for holding liquid to be absorbed, such as distilled water, tap water, vegetable oil, artificial blood, and the like.

The cross beam 30 is configured to move up and down along the vertical direction, and specifically, a hollow sleeve 11 is connected to the base 10 along the longitudinal direction, an L-shaped connecting arm 12 is connected to the hollow sleeve 11 in a sliding manner, the L-shaped connecting arm 12 comprises a vertical rod 121 and a cross arm, the vertical rod 121 is arranged in the hollow sleeve 11 in a penetrating manner, the cross beam 30 is connected with the cross arm, the hollow sleeve 11 can be set to be a square pipe, an oval pipe or a round pipe, and the like, in other embodiments, the cross beam 30 can also be configured to be on a sliding seat, the sliding seat is arranged on a guide rod along the vertical direction, and the cross beam 30 can also move up and down along the vertical direction.

A camera 40 is installed in front of the beam 30, and the camera 40 is configured to be activated after a predetermined time after the beam 30 moves down by a predetermined distance, and to acquire an image of the height of the liquid absorbed by the strip-shaped sheet.

When the machine vision-based absorption performance tester is used, target liquid with a preset height is injected into a liquid storage tray 20, the absorbent sheet is cut into strips with a preset width, a plurality of strips are fixed on the cross beam 30, after the L-shaped connecting arm 12 moves downwards relative to the hollow sleeve 11 for a preset distance, the bottom ends of the strips are in contact with the liquid level in the liquid storage tray 20, the strips start to absorb the liquid, after a preset time, the camera 40 acquires images of the heights of the strips absorbing the liquid, and the liquid absorption performance of the sheets is acquired through the images.

Wherein, the liquid absorption performance of the sheet material is specifically the height of the strip-shaped sheet material with a preset width for absorbing the target liquid in a preset time, and the liquid absorption performance can be converted into the liquid absorption speed of the strip-shaped sheet material according to the evaluation requirement of the liquid absorption performance of the sheet material.

The beam 30 is horizontally arranged, and the plurality of strip-shaped sheets are vertically fixed on the beam 30, and it can be understood that when the strip-shaped sheets are fixed, the distance between the bottom ends of the strip-shaped sheets and the liquid level in the liquid storage tray 20 is equal to the predetermined distance.

This absorption performance tester based on machine vision can be fixed a plurality ofly simultaneously through a plurality of clip 31 on crossbeam 30 to realized carrying out synchronous detection to the imbibition performance of a plurality of strip sheets (the parallel appearance of same kind of sheet or different kinds of sheet), improved detection efficiency.

Preferably, the width of the strip-shaped sheet is set to be 25.4mm, and the length of the strip-shaped sheet is not less than 80 mm.

Referring to fig. 2, fig. 2 shows a structure of the clip 31, and further, in this embodiment, the cross beam 30 is a flat steel beam, a magnetic block 310 is disposed on a side of the clip 31 close to the cross beam 30, and when fixing a strip-shaped sheet, the sheet is attached to a side surface of the cross beam 30, so that the clip 31 and the cross beam 30 are connected by the magnetic block 310, thereby clamping and fixing the strip-shaped sheet between the clip 31 and the cross beam 30.

Furthermore, the rotating shaft 301 is installed on the cross beam 30, the clamping buckle 31 is connected to the rotating shaft 301, when the strip-shaped sheet is fixed, the sheet is attached to the outer side face of the cross beam 30, the clamping buckle 31 is rotated to be close to the cross beam 30, and the clamping buckle 31 and the cross beam 30 are connected in an adsorption mode through the magnetic blocks 310.

The free end 311 of the clip 31 is bent away from the cross member 30 to form a grip for facilitating rotation of the clip 31 relative to the cross member 30.

It can be understood that a plurality of rotating shafts 301 are installed on the cross beam 30 at intervals, and each clip 31 is correspondingly connected with one rotating shaft 301.

Further, the camera 40 is connected to the hollow sleeve 11 through a support frame 13, and the camera 40 is disposed in the middle of the plurality of strip-shaped sheets to ensure that the image acquired by the camera 40 can cover all the strip-shaped sheets on the beam 30.

Further, the camera 40 includes a CCD camera having pixels not less than forty thousand, and the CCD camera captures an image of the plurality of strip-shaped sheets on the beam 30 after absorbing the target liquid, and performs feedback.

In a preferred embodiment, the camera 40 is connected to a computer, and the camera 40 acquires images of the heights of the liquid absorbed by the plurality of strip-shaped sheets and transmits the images to the computer, and the heights of the liquid absorbed by the plurality of strip-shaped sheets are obtained by comparing the images with a liquid absorption height standard image or identifying the images through distance measurement software.

Further, in the present embodiment, a travel switch 110 is mounted on the hollow sleeve 11, and when the L-shaped connecting arm 12 moves downward relative to the hollow sleeve 11 by a predetermined distance, the travel switch 110 is turned on.

Furthermore, the travel switch 110 is installed outside the hollow sleeve 11, a protrusion 120 is correspondingly disposed on the L-shaped connecting arm 12, and when the L-shaped connecting arm 12 moves downward relative to the hollow sleeve 11 by a predetermined distance, the protrusion 120 touches the travel switch 110 downward, so that the travel switch 110 is turned on.

Furthermore, the absorption performance tester based on machine vision further comprises a timer, when the travel switch 110 is started, the timer is started to start automatic timing, and after a preset time, the camera 40 acquires images of the heights of the liquid absorbed by the strip-shaped sheets.

In one application scenario, the machine vision-based absorption performance tester further comprises a controller, such as a PLC controller, wherein the travel switch 110 is in signal connection with an input end of the controller, and the timer and the camera 40 are in signal connection with an output end of the controller.

Further, in this embodiment, the absorption tester based on machine vision further includes a rotating handle 101 disposed on the front side surface of the base 10, the rotating handle 101 is fixed on a central shaft 102 connected with the cam 103, the L-shaped connecting arm 12 includes a vertical rod 121, the bottom end of the vertical rod 121 abuts against the outer circumference of the cam 103, and the rotating handle 101 is rotated to slide the vertical rod 121 downward or upward within the hollow sleeve 11 by the predetermined distance.

As can be understood, the difference between the maximum radius and the minimum radius of the cam 103 is equal to the predetermined distance, in the initial state, the bottom end of the stem 121 abuts on the outer circumference corresponding to the maximum radius of the cam 103, the rotating handle 101 is rotated to abut the bottom end of the stem 121 on the outer circumference corresponding to the minimum radius of the cam 103, and the stem 121 slides downwards in the hollow sleeve 11 by the predetermined distance; after the measurement is finished, the rotating handle 101 is rotated to enable the bottom end of the vertical rod 121 to abut against the periphery corresponding to the maximum radius of the cam 103, and the L-shaped connecting arm 12 slides upwards in the hollow sleeve 11 for resetting by the preset distance.

In an application scene, be connected with a plurality of scales 50 on the crossbeam 30, the both sides of every scale 50 respectively are provided with one clip 31, scale 50 perpendicular to crossbeam 30 sets up, and a strip sheet is respectively fixed to the both sides of every scale 50, the setting of scale 50 makes can obtain a plurality ofly more directly perceivedly in the image that obtains from camera 40 the height that the liquid was absorbed to the strip sheet, and is further, the precision of scale sets up to 1 mm.

In addition, the scale 50 is also used for calibrating the liquid level of the liquid in the liquid storage tray 20 and the fixing position of the strip-shaped sheet on the cross beam 30, specifically, the 0 scale mark of the scale 50 is set to be equal to the predetermined distance from the liquid level of the liquid in the liquid storage tray 20, and when the strip-shaped sheet is fixed on the cross beam 30, the bottom end of the strip-shaped sheet is flush with the 0 scale mark of the scale 50.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An absorption performance tester based on machine vision comprises a base and is characterized in that a liquid storage disc for storing liquid to be absorbed is arranged on the base, a cross beam is arranged above the liquid storage disc, and a plurality of clips are connected to the cross beam at intervals and used for fixing strip-shaped sheets;

the cross beam is configured to move up and down along the vertical direction;

the camera is arranged in front of the cross beam and is configured to be started according to preset time after the cross beam moves downwards for a preset distance, and an image of the height of the liquid absorbed by the strip-shaped sheet is acquired.

2. The machine vision-based absorption capacity tester as claimed in claim 1, wherein a hollow sleeve is vertically provided on the base, an L-shaped connecting arm is slidably connected in the hollow sleeve, the beam is connected to the L-shaped connecting arm, the base further comprises a rotating handle fixed on a center shaft provided with a cam, a bottom end of the L-shaped connecting arm abuts on an outer circumference of the cam, and the L-shaped connecting arm moves downward or upward within the hollow sleeve by the predetermined distance when the rotating handle is rotated.

3. The machine vision based absorption property tester according to claim 2, wherein a stroke switch is installed on the hollow sleeve, and the stroke switch is turned on when the L-shaped connecting arm moves downward relative to the hollow sleeve by a predetermined distance.

4. The machine vision-based absorption performance tester according to claim 3, wherein the travel switch is installed outside the hollow sleeve, a protrusion is correspondingly arranged on the L-shaped connecting arm, and when the L-shaped connecting arm moves downwards relative to the hollow sleeve by a predetermined distance, the protrusion touches the travel switch downwards, so that the travel switch is turned on.

5. The machine vision based absorption property tester according to claim 3, further comprising a timer, wherein when the travel switch is turned on, the timer starts to count time, and after a predetermined time, the camera acquires an image of the height of the liquid absorbed by the strip-shaped sheet.

6. The machine vision-based absorbency tester of claim 1 wherein the camera is connected to a computer, and the camera captures an image of the level of liquid absorbed by the plurality of strip-like sheets and transmits the image to the computer.

7. The machine vision-based absorption tester as claimed in claim 1, wherein the beam is a steel beam, and a magnet is disposed on a side of the clip close to the beam.

8. The machine vision-based absorption performance tester according to claim 1, wherein a rotating shaft is mounted on the cross beam, the clip is connected with the rotating shaft, and a free end of the clip is bent to a side away from the cross beam.

9. The machine vision-based absorption capacity tester as claimed in claim 1, wherein a plurality of scales are vertically connected to the cross beam, one clip is provided on each side of each scale, and the bottom end of the strip-shaped sheet fixed to the cross beam is flush with the 0-th scale line of the scale.

10. The machine vision based absorption tester according to claim 2 wherein the camera is attached to the hollow sleeve by a support frame, the camera being disposed in the middle of the plurality of strip-shaped sheets.