CN102735683A - Reading instrument of pH test paper - Google Patents
Reading instrument of pH test paper Download PDFInfo
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- CN102735683A CN102735683A CN2012102607518A CN201210260751A CN102735683A CN 102735683 A CN102735683 A CN 102735683A CN 2012102607518 A CN2012102607518 A CN 2012102607518A CN 201210260751 A CN201210260751 A CN 201210260751A CN 102735683 A CN102735683 A CN 102735683A
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Abstract
The invention relates to an automatic reading instrument of pH test paper. The automatic reading instrument comprises a light source (1), a mechanical structure (2), a color sensor (3), a signal processing circuit (4), a human-computer interaction circuit (5), software (6) and the like, wherein the color sensor (3) serves as a probe; the wide-spectrum light source (1) lights the pH test paper and at least comprises spectral components which correspond to primary colors of the color sensor (3); and the color sensor (3) measures the color of the reflected light of the pH test paper. When the automatic reading instrument of the pH test paper is used, the color of a pH test paper strip is developed according to instructions of the pH test paper, the pH test paper strip is placed on a test paper clamping mechanism (2A), and a reading function is started. The automatic reading instrument of the pH test paper has the advantages that the color of the reflected light of the pH test paper is automatically detected, and a pH value is matched with the color by the signal processing circuit (4) according to a preset color index table, so the pH value is quantitatively read and quantitatively displayed by the human-computer interaction circuit (5).
Description
Technical field
This patent relates to the pH test paper value of reading device automatically, relates in particular to the quantitatively value of reading device of a kind of pH test paper that matees based on test paper reflected light color identifying and intelligence, is used to replace manual work to distinguish pH test paper reading.
Background technology
Hydrogen ionexponent (hydrogen ion concentration) is meant the ratio of hydrionic sum in the solution and total amount of substance, and its numerical value is commonly called as " pH value ".The numerical value of expression solution acidic or alkaline degree, the i.e. negative value of the common logarithm of contained pH.PH is a yardstick of weighing solution acid-basicity, all need measure the potential of hydrogen of solution aspect many in medical diagnosis, chemical, agricultural production, health quarantine, food security etc.
The pH value common method of measuring solution has: 1) use the pH indicator, in solution to be measured, add the pH indicator, different indicator just can be confirmed the scope of pH according to different pH value meeting changes colours according to the research of indicator.2) use the pH test paper, the pH test paper has extensive test paper (scope 1-14, precision 1) and precision test paper, and (scope is divided into 0.5-5.0; 0.1-1.2,0.8-2.4 etc., precision commonly used has 0.5; 0.2; 0.1), dip in a bit with glass bar solution to be measured can obtain the pH of solution then according to the change color reference standard colorimetric card of test paper to test paper.3) use pH meter, pH meter is a kind of instrument of measuring the pH value of solution value, and it selects electrode (like glass electrode) to determine the pH of solution through pH.
Because convenient to use, cost is low, the pH test paper is widely used in the not high detection occasion of accuracy requirement.But the pH test paper needs artificial and the colorimetric card comparison, thereby to the detected solution pH value value of reading.Receive that the on-the-spot lighting source of practical application is different, the influence of factors such as colorimetric card material and test paper material reflection characteristic difference and different testing staff's chromatic discrimination power difference, visual fatigue degree, possibly cause the pH value value of reading inaccurate.A large amount of in addition the repetition distinguishes that look work also causes testing staff's fatigue easily, reduces work efficiency.Therefore through the priming illumination light source, the standard colorimetric data is implanted analysis software, is adopted and do not rely on the color detection instrument that human eye differentiates the pH test paper is carried out the number of degrees, with the reliability that further improves the pH test paper number of degrees.
Technical scheme of the present invention: the present invention is made up of light source (1), physical construction (2), color detector (3), signal processing circuit (4), man-machine interaction circuit (5) and software parts such as (6).Adopt color detecting sensor (2) as probe, adopt broad spectrum light source (1) that the pH test paper is thrown light on, wide spectrum light source (1) should be contained in the corresponding spectral component of color detector (3) primary colours at least; Color sensor (3) receives the reflected light of pH test paper.When use is of the present invention; Make the colour developing of pH test strips according to pH test paper operation instruction; And test strips is placed in test paper catch mechanism of the present invention (2A) go up starts the number of degrees, the present invention detects pH test paper reflected light color automatically, and pH value and color is mated according to the color index table of implanting in advance by data processing circuit (4); Thereby realize quantitatively value of reading of pH value, and show through man-machine interaction circuit (5).
With compared with techniques formerly, the present invention has following technique effect:
1, device solves according to the invention pH test paper manual read be worth the problem such as visual fatigue, human eye valuation error of existence.
2, device according to the invention adopts the color detection technology that does not rely on artificial judgement, and repeatability is better, and is better for some color identifying abilities of obscuring easily, and distinguishing to compare with human eye suitably to increase the standard acidity color grading, improves detection sensitivity.
3, installation cost according to the invention is cheap easy to use.
The present invention provides the quantitatively value of reading device of a kind of pH test paper that matees based on reflected light color identifying and intelligence; Detection speed is fast; Easy to use, can give full play to pH value test paper advantage easy to use, improve problems such as visual fatigue that pH value test paper manual read is worth existence, human eye valuation error simultaneously; And further improve the value of reading precision, be fit to the application that the quick pH value of needs detects.
Description of drawings
Through accompanying drawing and embodiment, the technical scheme of this patent is done further to describe in detail.Characteristic of the present invention will be by fully open or clear reflection, and identical label refers to identical part among the figure.
Fig. 1 is a structural drawing of the present invention.
Fig. 2 is certain pH test paper HS-pH value figure.
Specific embodiment
As shown in Figure 1; Present embodiment adopts color of light able to programme-frequency translation chip as color sensor (3) (its function is: export the square-wave signal of different frequency respectively according to redgreenblue composition intensity in the light signal that impinges upon on its window, its frequency is directly proportional with light signal strength).With redgreenblue LED is lighting source (1), and its output spectrum is three wavelength windows of corresponding color sensor RGB respectively, diaphragm (2B) is set with the restriction field of illumination before LED.Control circuit (4) is formed (4B) by single-chip microcomputer (4A) and peripheral circuit, detects color sensor (3) output square-wave signal frequency through single-chip microcomputer (4A) counter and timer.Control circuit (4) also is responsible for driving lighting source (1) output stable color and power.Man-machine interaction circuit (5) is made up of LCD MODULE (5C), button (5B) and external data communication circuit (5A), and its function is display result, operational order input and exchanges data.Physical construction of the present invention (2) is responsible for the fixing and light path shading of each assembly.Circular port (2D) is arranged as detector window on the top of physical construction, relative with color sensor (3), three-color LED is exported over against the circular hole center.Circular hole is joined lid (2C), is used for fixing the pH test paper having covered stationary installation (2A).During use the pH test paper is fixed on the lid (2C); Wetting according to request for utilization, and will cover (2C) and buckle into circular hole (2D), the present invention's this moment constitutes light tight darkroom; Light source (1) hot spot just in time impinges upon the wetting center of pH test paper, and it diffuses and is measured by color sensor (3).For RGB (RGB) color signal of sensor (3) output, convert HSL (tone, saturation degree and brightness) signal into and confirm the pH value of testing sample according to being kept at the color-pH value table that generates in advance in data processing circuit (4) nonvolatile memory by software (6).PH test paper calibration information to be measured can be imported present embodiment in advance through man-machine interaction circuit (5A), to guarantee that measurement accurately.Because pH value and HSL signal and nonlinear relationship, like Fig. 2, the value of reading of pH precision is by itself effectiveness of classification decision.
Present embodiment only provides a kind of specific embodiments under method proposed by the invention instructs; Do not limit this method embodiment and application; Any do not break away from this method spirit to modification of the present invention and distortion, should be covered by within the institute of the present invention coverage.
Claims (7)
1. the pH test paper value of reading appearance according to the invention is characterized in that: be made up of light source (1) physical construction (2), color sensor (3), signal processing circuit (4), man-machine interaction circuit (5) and software parts such as (6).
2. the said light source of claim 1 (1) is characterized in that: output spectrum covering color sensor (3) sensing range, Output optical power and spectrum-stable.
3. the said physical construction of claim 1 (2) is characterized in that: be used for fixing other assembly and constitute the shading darkroom, comprise card holding structure (2A) and be used for fixing pH test paper position; Comprise hole (2D) as window; Comprise lid (2C) and be used to the airtight of pH test paper and shading darkroom of packing into.
4. the said color sensor of claim 1 (3) is characterized in that: can test strips reflected light signal color be converted into and can survey electric signal.
5. the said signal processing circuit of claim 1 (4) is characterized in that: contain processor chips, but operating software (6) is confirmed the pH value test paper value of reading through the normal data of detection signal with input in advance compared.
6. the said man-machine interaction circuit of claim 1 (5) is characterized in that: be used to show pH value and interaction data and man-machine data interaction.
7. the pH test paper value of reading appearance according to the invention, it is characterized in that: the quantification that is used for pH test paper color signal is read.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102607518A CN102735683A (en) | 2012-07-25 | 2012-07-25 | Reading instrument of pH test paper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102607518A CN102735683A (en) | 2012-07-25 | 2012-07-25 | Reading instrument of pH test paper |
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| CN102735683A true CN102735683A (en) | 2012-10-17 |
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| CN2012102607518A Pending CN102735683A (en) | 2012-07-25 | 2012-07-25 | Reading instrument of pH test paper |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374767A (en) * | 2013-08-13 | 2015-02-25 | 嘉兴驰网工业自动化科技有限公司 | Portable type intelligent food safety detector |
| CN105164514A (en) * | 2013-01-21 | 2015-12-16 | 康奈尔大学 | Smartphone-based apparatus and method for obtaining repeatable, quantitative colorimetric measurement |
| CN105241880A (en) * | 2015-09-08 | 2016-01-13 | 中国农业大学 | PH value automatic monitoring system |
| CN108760728A (en) * | 2018-04-28 | 2018-11-06 | 镇江市高等专科学校 | A kind of efficient pH detection devices |
| CN111982899A (en) * | 2020-08-23 | 2020-11-24 | 南京中车浦镇城轨车辆有限责任公司 | Method for detecting pH value and portable pH value rapid detector |
| CN112748106A (en) * | 2021-02-01 | 2021-05-04 | 珠海市人民医院 | Acid-base detection system for endocrine |
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| CH653133A5 (en) * | 1981-08-25 | 1985-12-13 | Ballmoos Ag Von | Appliance for monitoring the air for atypical pollutants |
| CN2874497Y (en) * | 2005-06-16 | 2007-02-28 | 姜世民 | Multiple sample batch detection type urine analysis instrument |
| CN101441164A (en) * | 2007-09-15 | 2009-05-27 | 周中人 | Embedded type immune test paper image recognition and quantitative analyzer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105164514A (en) * | 2013-01-21 | 2015-12-16 | 康奈尔大学 | Smartphone-based apparatus and method for obtaining repeatable, quantitative colorimetric measurement |
| CN104374767A (en) * | 2013-08-13 | 2015-02-25 | 嘉兴驰网工业自动化科技有限公司 | Portable type intelligent food safety detector |
| CN105241880A (en) * | 2015-09-08 | 2016-01-13 | 中国农业大学 | PH value automatic monitoring system |
| CN108760728A (en) * | 2018-04-28 | 2018-11-06 | 镇江市高等专科学校 | A kind of efficient pH detection devices |
| CN108760728B (en) * | 2018-04-28 | 2023-06-06 | 镇江市高等专科学校 | High-efficient pH detection device |
| CN111982899A (en) * | 2020-08-23 | 2020-11-24 | 南京中车浦镇城轨车辆有限责任公司 | Method for detecting pH value and portable pH value rapid detector |
| CN111982899B (en) * | 2020-08-23 | 2022-11-25 | 南京中车浦镇城轨车辆有限责任公司 | Method for detecting pH value and portable pH value rapid detector |
| CN112748106A (en) * | 2021-02-01 | 2021-05-04 | 珠海市人民医院 | Acid-base detection system for endocrine |
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Owner name: SHEN LI Free format text: FORMER OWNER: XIN AN NUOYA (BEIJING) CATALYTIC TECHNOLOGY CO., LTD. Effective date: 20130314 |
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Inventor after: Shen Li Inventor before: Shen Li Inventor before: Miao Hui Inventor before: Li Hongyan Inventor before: Liu Lin Inventor before: Liu Yan Inventor before: Liu Haina |
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Free format text: CORRECT: INVENTOR; FROM: SHEN LI MIAO HUI LI HONGYAN LIU LIN LIU YAN LIU HAINA TO: SHEN LI Free format text: CORRECT: ADDRESS; FROM: 100022 CHAOYANG, BEIJING TO: 100121 CHAOYANG, BEIJING |
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Effective date of registration: 20130314 Address after: 100121, No. 7, building 1208, south 3, Li Huang factory, Chaoyang District, Beijing Applicant after: Shen Li Address before: 100022, room 6, floor 63, building 701, middle third ring road, Chaoyang District, Beijing Applicant before: New shores Noah (Beijing) Catalytic Technology Co., Ltd. |
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Application publication date: 20121017 |