CN114324316A - Method and system for detecting ph test paper - Google Patents
Method and system for detecting ph test paper Download PDFInfo
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- CN114324316A CN114324316A CN202111671697.1A CN202111671697A CN114324316A CN 114324316 A CN114324316 A CN 114324316A CN 202111671697 A CN202111671697 A CN 202111671697A CN 114324316 A CN114324316 A CN 114324316A
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- 238000012360 testing method Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004448 titration Methods 0.000 claims abstract description 9
- 238000004364 calculation method Methods 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 238000004737 colorimetric analysis Methods 0.000 claims description 11
- 239000000243 solution Substances 0.000 description 31
- 239000011521 glass Substances 0.000 description 9
- 238000001514 detection method Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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Abstract
The application provides a method and a system for detecting ph test paper, belongs to the technical field of ph test paper, and is used for solving the problems that in the related technology, the result precision and accuracy obtained by measuring the ph value of a solution to be detected by adopting the ph test paper are low. In the method and the system, at least two preset positions of ph test paper of circular colorimetric cards with different sizes and taking the preset positions as circle centers are adopted to receive the solution to be detected, titration is stopped when the solution to be detected is diffused to the inner diameter of the circular colorimetric card with the diameter not smaller than the maximum diameter, after image information of a color change result is obtained, the matching relation between the color of the ph test paper adjacent to the circular colorimetric card and close to one side of the circle center in the image information and the color of gradual-change scale on the circular colorimetric card is judged, so that at least two scale result information is obtained, and finally, the final reading result information is determined according to a preset reading calculation rule. The method and the system can improve the precision and accuracy of the reading result.
Description
Technical Field
The application relates to the technical field of ph test paper, in particular to a method and a system for detecting ph test paper.
Background
Specifically, the solution to be detected is dropped on the ph test paper or the ph test paper is dipped in some solution to be detected, after a certain reaction time is set at intervals, the area of the ph test paper, which is stained with the solution to be detected, is compared with the color on the color card, and the ph value of the solution to be detected is determined according to the colorimetric result.
Aiming at the related technologies, the inventor finds that the result obtained by measuring the ph value of the solution to be measured by adopting the ph test paper has lower precision and accuracy.
Disclosure of Invention
The application provides a method and a system for detecting ph test paper, which are beneficial to improving the precision and accuracy of a result of detecting the ph value of a solution to be detected by adopting the ph test paper.
In a first aspect, the present application provides a method for ph dipstick detection. The method comprises the following steps:
acquiring image information of the reverse side of the ph test paper, wherein a solution to be detected is titrated at a specified position on the ph test paper and is diffused to a preset size; the preset position on the back side of the ph test paper is provided with at least two circular colorimetric cards with different sizes and taking the preset position as the center of a circle, the circular colorimetric cards are provided with gradient scale colorimetry clockwise or anticlockwise, and the diameter of the preset size is not smaller than the inner diameter of the maximum circular colorimetric card;
based on a color comparison algorithm, judging the matching relationship between the color of the ph test paper adjacent to the circular colorimetric card and close to one side of the circle center in the image information and the color comparison of the gradually-changed scales on the circular colorimetric card to obtain at least two scale result information;
and determining the reading result information of the solution to be detected according to at least two pieces of scale result information based on a preset reading calculation rule.
By adopting the technical scheme, the reduction of precision and accuracy possibly brought to the reading result information by uncertainty of manual operation is eliminated, the limitation of the limited number of the traditional colorimetric cards and the mutual independence of the traditional colorimetric cards to the precision of the reading result information is eliminated, the reduction of the accuracy possibly brought to the degree result information by traditional naked eye colorimetric is eliminated, the reduction of the accuracy brought to the reading result information by different colors of different positions of the region of the ph test paper stained with the solution to be tested is eliminated, and therefore the precision and the accuracy of the reading result information are greatly improved.
Further, the ph test paper is circular, the preset position is the circle center of the ph test paper, and the preset position on the front surface of the ph test paper is provided with an identification mark;
the method further comprises the following steps: and determining the preset position according to the identification mark based on a feature recognition technology.
Further, the reading calculation rule is as follows: the reading result information is equal to the weighted average of all the scale result information, and the weight information corresponding to each scale result information is determined according to the preset weight information corresponding to the circular colorimetric card.
In a second aspect, the present application provides a system for ph strip detection, the system comprising:
the reverse side of the ph test paper is provided with at least two circular colorimetric cards with different sizes and taking the preset position as the center of a circle, and the circular colorimetric cards are provided with gradient scale colorimetry clockwise or anticlockwise;
the solution titration device is used for titrating the solution to be detected at a preset position on the ph test paper until the solution to be detected is diffused to a preset size on the ph test paper;
the image acquisition device is used for acquiring the image information of the preset position on the reverse side of the ph test paper; and
a terminal device or server for performing any of the methods as described above in the first aspect.
Further, the ph test paper is circular, the preset position is the circle center of the ph test paper, and the preset position on the front surface of the ph test paper is provided with an identification mark.
Further, the number of the circular colorimetric cards is three.
Further, the width of the circular colorimetric card is 2mm, the inner diameter of the smallest circular colorimetric card is 3mm, the inner diameter of the middle circular colorimetric card is 7mm, and the inner diameter of the largest circular colorimetric card is 11 mm.
Furthermore, the gradual change scale colorimetries of the adjacent circular colorimetric cards are arranged along the opposite clockwise direction.
In summary, the present application at least includes the following beneficial effects:
1. the method and the system for detecting the ph test paper can improve the precision and the accuracy of a result of detecting the ph value of a solution to be detected by adopting ph;
2. the number of the three circular colorimetric cards is reasonable, the requirement on reading precision can be met, and the lower cost and the amount of the solution to be measured required by single reading can be guaranteed;
3. the gradual change scale color comparison of adjacent circle shape colorimetric cards sets up along opposite hour hand direction, is favorable to further ensuring the accuracy of final reading result information.
It should be understood that what is described in this summary section is not intended to limit key or critical features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of various embodiments of the present application will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:
FIG. 1 is a block diagram of a system for ph strip detection in an embodiment of the present application;
FIG. 2 shows a front view of a ph test strip in an embodiment of the present application;
FIG. 3 shows a reverse view of the ph test strip in an embodiment of the present application;
FIG. 4 shows a flow chart of a method for ph strip detection in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The application provides a method and a system for detecting ph test paper, which can improve the precision and accuracy of a detection result of a solution to be detected.
Fig. 1 shows a block diagram of a system 100 for ph strip testing in an embodiment of the present application.
The system 100 includes a ph test strip 110, a solution titration apparatus 120, an image acquisition apparatus 130, and a terminal device or server 140. The ph test paper 110 is used for bearing a solution to be tested to change color, the solution titration apparatus 120 is used for titrating the solution to be tested, the image acquisition apparatus 130 is used for acquiring image information of the color-changed ph test paper, and the terminal device or the server 140 is used for intelligently determining a ph value of the solution to be tested.
FIG. 2 shows a front view of ph paper 110 in an embodiment of the present application; figure 3 shows a reverse view of ph paper 110 in an embodiment of the present application.
As shown in fig. 2 and 3, the ph test paper 110 is circular, a cross-shaped identification mark is disposed at the center of the circle of the front surface of the ph test paper, and three circular colorimetric cards 111 are fixedly disposed on the back surface of the ph test paper. The three circular colorimetric cards 111 have different sizes and use the circle center of the ph test paper 110 as the circle center, the circular colorimetric card 111 is provided with gradation scale colorimetry clockwise or counterclockwise, and the gradation scale colorimetry on the adjacent circular colorimetric cards 111 has an opposite clockwise direction.
In one example, the diameter of the ph test paper 110 is 13mm, and the widths of the three circular colorimetric cards 111 are all 2mm, wherein the inner diameter of the smallest circular colorimetric card 111 is 3mm, the inner diameter of the middle circular colorimetric card 111 is 7mm, and the inner diameter of the largest circular colorimetric card is 11 mm; the gradual change scale colorimetries on the smallest circular colorimetric card 111 and the largest circular colorimetric card 111 are gradually changed from initial position lines to initial position lines clockwise, the gradual change scale colorimetries of the medium circular colorimetric card 111 are gradually changed from the initial position lines to the initial position lines anticlockwise, the initial position lines on the three circular colorimetric cards 111 are distributed on a radius of the ph test paper 110, the gradual change scale colorimetries of the three circular colorimetric cards 111 correspond to the same ph value range, and the measurable ph value range is 5-9.
The solution titration apparatus 120 specifically includes an electric injector 121 and a robot arm 122, wherein the electric injector 121 is disposed at a movable end of the robot arm 122, and the robot arm 122 may be a three-axis robot arm, which can flexibly control a position of the electric injector 121. The movable end of the robot arm 122 has a camera.
In order to realize the placement of the ph test paper 110, the system 100 further comprises a test paper positioning device 150, the test paper positioning device 150 comprises a glass table-board 151 and an electric control telescopic rod 152 for abutting the ph test paper 110 on the glass table-board 151, the glass table-board 151 is arranged horizontally, a test paper slot matched with the ph test paper 110 is formed in the glass table-board 151, the electric control telescopic rod 152 is vertically arranged above the test paper slot on the glass table-board 151 through a support, and the telescopic rod of the electric control telescopic rod can vertically extend downwards to abut against the bottom of the test paper slot on the glass table-board 151. In order to avoid electric control expansion and contraction, 152 damages the ph test paper 110, the end of the expansion rod of the electric control expansion rod 152 can be set to be a rubber head.
The image capturing device 130 may be a camera disposed below the glass table 151 and facing the glass table 151 in a shooting direction, and is capable of capturing image information of the back surface of the ph test paper 110 placed on the glass table 151.
The terminal device or server 140 is connected to the solution titration apparatus 120, the image acquisition apparatus 130 and the test paper positioning apparatus 150. Specifically, the terminal device or the server 140 can control the drawing and injection of the power injector 121, control the motion of the robot arm 122, and acquire an image acquired by a camera at the movable end of the robot arm 122, the terminal device or the server 140 can also acquire image information acquired by the image acquisition device 130, and the terminal device or the server 140 can also control the extension and the contraction of the electrically controlled telescopic rod 152 of the test paper positioning device 150.
The method for intelligently determining the ph value of the solution to be measured by the terminal device or the server 140 will be described later.
FIG. 4 shows a flow chart of a method 200 for ph strip testing in an embodiment of the present application. The method 200 may be specifically executed by the terminal device or the server 140 in fig. 1, which is a method for intelligently determining the ph value of the solution to be measured in the terminal device or the server 140.
The method 200 specifically comprises the following steps:
s210: and acquiring the image information of the reverse side of the ph test paper 110.
The ph test paper 110 titrates the solution to be detected from the center of the circle on the front side, the solution to be detected diffuses to a specified size from the back side of the ph test paper 110, and the color change is completed after a preset time. The diffusion shape of the solution to be detected on the ph test paper 110 is a circle concentric with the ph test paper 110, and the specified size is the inner diameter of the circular colorimetric card 111 with the diameter equal to the maximum diameter.
The designated size can be realized by the terminal device or the server 140 automatically controlling the timing of stopping the titration of the solution titration apparatus 120 according to the image information collected by the image collection apparatus 130 and according to the feature recognition technology, which is not specifically described herein.
S220: based on a color comparison algorithm, the matching relationship between the color of the ph test paper 110 adjacent to the circular colorimetric card 111 and close to the circle center in the image information and the color comparison of the gradually-changed scales on the circular colorimetric card is judged, so as to obtain at least two scale result information.
The color comparison algorithm is the existing algorithm and is not described in an expansion way.
In one example, the terminal device or server 140 compares the circle center area of the ph test paper 110 with the color on the smallest color chart with a circular shape 111 to obtain the first scale result information; comparing the color of the ph test paper 110 in the area between the minimum and medium circular colorimetric cards 111 with the color of the medium circular colorimetric card 111 to obtain second scale result information; comparing the color of the ph test paper 110 in the area between the middle and the largest circular colorimetric cards 111 with the color of the largest circular colorimetric card 111 to obtain the third scale result information.
S230: and determining the reading result information of the solution to be measured according to the at least two pieces of scale result information based on a preset reading calculation rule.
The reading calculation rule is as follows: the reading result information is equal to the weighted average of all the scale result information, and the weight information corresponding to each scale result information is determined according to the preset weight information corresponding to the circular colorimetric card.
In one example, the terminal device or server 140 may set the weight information relative to the smallest, medium, and largest circular colorimetric cards 111 as needed, for example, the weight information of the smallest circular colorimetric card 111 is 80%, the weight information of the medium circular colorimetric card 111 is 15%, the weight information of the largest circular colorimetric card 111 is 5%, the reading result information is equal to the first scale result information multiplied by 80%, the second scale result information multiplied by 15%, and the third scale result information multiplied by 5%.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are exemplary embodiments and that the acts and modules referred to are not necessarily required in this application.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the disclosure. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (8)
1. A method for ph strip (110) testing, comprising:
acquiring image information of the reverse side of the ph test paper (110), wherein a solution to be detected is titrated at a specified position on the ph test paper (110) and is diffused to a preset size; at least two different circular colorimetric cards (111) with different sizes and taking the preset positions as the circle centers are arranged at the preset positions on the back surface of the ph test paper (110), the circular colorimetric cards (111) are clockwise or anticlockwise provided with gradient scale colorimetry, and the diameter of the preset size is not smaller than the inner diameter of the maximum circular colorimetric card (111);
based on a color comparison algorithm, judging the matching relationship between the color of the ph test paper (110) adjacent to the circular colorimetric card (111) and close to the circle center in the image information and the color comparison of the gradually-changed scales on the circular colorimetric card (111) so as to obtain at least two scale result information;
and determining the reading result information of the solution to be detected according to at least two pieces of scale result information based on a preset reading calculation rule.
2. The method according to claim 1, wherein the ph test strip (110) is circular, the preset position is the center of the ph test strip (110), and the preset position on the front surface of the ph test strip (110) is provided with an identification mark;
the method further comprises the following steps: and determining the preset position according to the identification mark based on a feature recognition technology.
3. The method according to claim 1 or 2, wherein the reading calculation rule is: the reading result information is equal to the weighted average of all the scale result information, and the weight information corresponding to each scale result information is determined according to the preset weight information corresponding to the circular colorimetric card (111).
4. A system for ph strip (110) testing, comprising:
the device comprises a ph test paper (110), wherein the reverse side of the ph test paper (110) is provided with at least two circular colorimetric cards (111) with different sizes and taking the preset position as the center of a circle, and the circular colorimetric cards (111) are provided with gradient scale colorimetries clockwise or anticlockwise;
the solution titration device (120) is used for titrating the solution to be detected at a preset position on the ph test paper (110) until the solution to be detected is diffused to a preset size on the ph test paper (110);
the image acquisition device (130) is used for acquiring image information of the preset position on the reverse side of the ph test paper (110); and
terminal device or server (140) for performing the method according to any of claims 1-6.
5. The system of claim 7, wherein the ph test strip (110) is circular, the preset position is the center of the ph test strip (110), and the preset position on the front surface of the ph test strip (110) is provided with an identification mark.
6. The system according to claim 4, wherein there are three cuvettes (111).
7. The system of claim 6, wherein the torus colorimetric card (111) has a width of 2mm, the smallest torus colorimetric card (111) has an inner diameter of 3mm, the middle torus colorimetric card (111) has an inner diameter of 7mm, and the largest torus colorimetric card (111) has an inner diameter of 11 mm.
8. The system according to any one of claims 4 to 7, wherein the graduated scale colorimetries adjacent to the circular colorimetric cards (111) are arranged in opposite clockwise directions.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111671697.1A CN114324316B (en) | 2021-12-31 | 2021-12-31 | Method and system for detecting ph test paper |
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| CN202111671697.1A CN114324316B (en) | 2021-12-31 | 2021-12-31 | Method and system for detecting ph test paper |
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Citations (7)
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|---|---|---|---|---|
| JPH1130614A (en) * | 1997-07-10 | 1999-02-02 | Astec Corp:Kk | Urine cup and urine test paper |
| CN201995762U (en) * | 2011-04-13 | 2011-10-05 | 浙江大学 | Acid rain monitoring umbrella |
| US20130177485A1 (en) * | 2007-11-27 | 2013-07-11 | Momtec Life Ltd. Of Yazmot Haemek | Diagnostic device for identifying rupture of membrane during pregnancy |
| CN203117112U (en) * | 2013-01-30 | 2013-08-07 | 泰安市中心医院 | PH value test paper provided with colorimetric card |
| CN105510326A (en) * | 2016-01-17 | 2016-04-20 | 罗洋洋 | Novel pH test strip |
| CN110226085A (en) * | 2017-11-29 | 2019-09-10 | 汉阳大学校产学协力团 | Uroscopy test paper, the detection of uroscopy test paper and analysis method including timer |
| CN214011042U (en) * | 2020-12-07 | 2021-08-20 | 艾博（武汉）生物技术有限公司 | Multi-parameter quantitative detection device |
-
2021
- 2021-12-31 CN CN202111671697.1A patent/CN114324316B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1130614A (en) * | 1997-07-10 | 1999-02-02 | Astec Corp:Kk | Urine cup and urine test paper |
| US20130177485A1 (en) * | 2007-11-27 | 2013-07-11 | Momtec Life Ltd. Of Yazmot Haemek | Diagnostic device for identifying rupture of membrane during pregnancy |
| CN201995762U (en) * | 2011-04-13 | 2011-10-05 | 浙江大学 | Acid rain monitoring umbrella |
| CN203117112U (en) * | 2013-01-30 | 2013-08-07 | 泰安市中心医院 | PH value test paper provided with colorimetric card |
| CN105510326A (en) * | 2016-01-17 | 2016-04-20 | 罗洋洋 | Novel pH test strip |
| CN110226085A (en) * | 2017-11-29 | 2019-09-10 | 汉阳大学校产学协力团 | Uroscopy test paper, the detection of uroscopy test paper and analysis method including timer |
| CN214011042U (en) * | 2020-12-07 | 2021-08-20 | 艾博（武汉）生物技术有限公司 | Multi-parameter quantitative detection device |
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