CN101881644B - Method for accurately quantifying transparent solution by using light reflection - Google Patents
Method for accurately quantifying transparent solution by using light reflection Download PDFInfo
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- CN101881644B CN101881644B CN2010102071126A CN201010207112A CN101881644B CN 101881644 B CN101881644 B CN 101881644B CN 2010102071126 A CN2010102071126 A CN 2010102071126A CN 201010207112 A CN201010207112 A CN 201010207112A CN 101881644 B CN101881644 B CN 101881644B
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Abstract
The invention discloses a method for accurately quantifying transparent solution by using light reflection, which uses the principle of light reflection to accurately quantify transparent solution at liquid level. The transparent solution at the liquid level is quantified through the reflection of light below the liquid level, the direct contact between a sensor and liquid is avoided and the quantification of the transparent solution at the liquid level through light reflection is more accurate. Moreover, the manual operation is reduced, all steps can be completed under the control of a computer, the repetitiveness is high and the uncertainties are less.
Description
Technical field
The present invention relates to the accurate quantification method of the WS in the automated analysis field, relate in particular to a kind of method of utilizing light reflection carrying out clear solution accurate quantification.
Background technology
The manual operations of the main laboratory of traditional WS quantivative approach quantitatively, a spot of WS can be with carrying out quantitatively through transfer pipet and calibrated pipet, the WS more than the 100ml generally carries out quantitatively with volumetric flask; Traditional quantivative approach advantage is quantitatively accurately, applied range, but along with development of science and technology; Traditional analytical method has been difficult to adapt to the development of modernization industry; Because conventional artificial quantivative approach length consuming time, safeguard loaded down with trivial detailsly, often exist artificial uncertain factor many; Thereby urgent need is a kind of faster, more efficiently quantivative approach.What present industry was upward commonly used is that a level sensor is set, and when liquid level arrived needed position, sensor just sent signal and accomplishes the quantitative of liquid.Such method relies on higher to sensor, and sensor for a long time contact with liquid, can pollution be arranged to liquid, and lack owing to sensor contacts the maintenance period that has caused this equipment for a long time with liquid, and precision is not high.
Summary of the invention
The technical matters that the present invention will solve has provided a kind of quick, maintenance period length, high duplication, the quantitative new method of little, the high-precision WS of uncertain factor.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: at first selecting wavelength is the quantitative light of light conduct of λ; Calculating this wavelength then is the refractive index n 1 (λ) of λ light in solution to be measured; Calculating this wavelength more then is the refractive index n 2 (λ) of λ light in holding the transparent wall material of solution to be measured; At last quantitative light is tiltedly injected the below from the transparent wall that holds solution to be measured; After this light gets into solution to be measured,, can penetrate from the transparent wall of opposite side through the liquid level reflection of solution to be measured; According to refraction and the principle of reflection and the light wavelength of light, calculate the position of liquid level.
Further, incident ray becomes the minute surface symmetry with reflection ray with normal.
Further, the angle that said quantitative light forms with normal in solution can form the critical angle of total reflection with this solution more than or equal to this quantitative light.
Further, the wavelength of said quantitative light is all light sources that 200-1100nm covered.
Adopted such scheme, in subsurface reflection the position of liquid level has been carried out quantitatively, avoided sensor and the direct of liquid to contact through light, and quantitatively more accurate to liquid level position of light reflection.Simultaneously, this equipment has reduced artificial operation, and each item step can be accomplished under computer control, and repeatability is high, and uncertain factor is little.
Description of drawings
Fig. 1 is the synoptic diagram that utilizes the method for light reflection carrying out clear solution accurate quantification.
Embodiment
Select wavelength be the light of λ as light source, calculate the refractive index of light source in solution of this wavelength according to following formula;
n(λ)＝1.31279+15.7622·λ
-1-43822·λ
-2+1.1455×106·λ
-3
N (λ)---by the wavelength of light source the refractive index of correspondence in the WS;
λ---be the wavelength of light source.
Can calculate wavelength according to n (λ) is that the light source of λ produces the angle [alpha] of total reflection in this solution.
According to the height of the quantitative liquid level of want, and light confirms the incident and the reflection route of light from liquid to airborne incident angle α, thereby sets the position and the angle of light source and optical sensor.Accomplish after above the setting; In container, inject solution through liquid feeding device, when liquid level reached our needed height, the incident light that light source sends just in time can be received by optical sensor through the liquid level reflection; After optical sensor receives reflection ray; Send a signal to liquid feeding device, liquid feeding device promptly stops liquor charging, thereby has accomplished the accurate quantification of solution.If incident angle also can embodiment of the present invention less than the angle that produces total reflection.
The warp that adopts traditional quantivative approach and new method provided by the present invention to carry out the WS is confirmed amount, and the result of gained, repeatability and quantitatively required time are as shown in table 1.The experimentation of method provided by the present invention is following: prepare two clean 500ml beakers; Fill distilled water for one; Another then is empty; Respectively with two kinds of methods get 5ml distilled water from the beaker that fills distilled water to another sky beaker, triplicate experiment, the reproducibility error and the consumption time of calculating the result that two kinds of methods record.
Table 1 adopts traditional potassium dichromate method and the inventive method to carry out water sample COD determination result relatively
The warp that adopts traditional quantivative approach and new method provided by the present invention to carry out the WS is confirmed amount, and the result of gained, repeatability and quantitatively required time are as shown in table 2.The experimentation of method provided by the present invention is following: prepare two clean 500ml beakers; Fill the chemical engineering sewage water sample for one; Another then is empty; Respectively with two kinds of methods get 5ml distilled water from the beaker that fills distilled water to another sky beaker, triplicate experiment, the reproducibility error and the consumption time of calculating the result that two kinds of methods record.
Table 2 adopts traditional potassium dichromate method and the inventive method to carry out water sample COD determination result relatively
Claims (4)
1. one kind is utilized light to reflect the method for carrying out the clear solution accurate quantification, it is characterized in that may further comprise the steps:
(1) selecting wavelength is the quantitative light of light conduct of λ;
(2) calculating this wavelength is the refractive index n 1 (λ) of λ light in solution to be measured;
(3) calculating this wavelength is the refractive index n 2 (λ) of λ light in holding the transparent wall material of solution to be measured
(4) quantitative light is tiltedly injected the below from the transparent wall that holds solution to be measured; After this light gets into solution to be measured,, can penetrate from the transparent wall of opposite side through the liquid level reflection of solution to be measured; Refraction and principle of reflection based on light; Known light wavelength and we need the position of quantitative liquid level, calculate the incident and the reflection circuit of bright dipping, thereby confirm the position of light source and optical sensor;
(5) quantitative solution is treated in injection in container, and when the liquid level of solution arrived our needed height, the light positive that light source sends can be received by optical sensor well, thereby stops liquor charging.
2. the method for utilizing light reflection carrying out clear solution accurate quantification according to claim 1 is characterized in that, incident ray becomes the minute surface symmetry with reflection ray with normal.
3. the method for utilizing light reflection carrying out clear solution accurate quantification according to claim 2 is characterized in that, the angle that said quantitative light forms with normal in solution can form the critical angle of total reflection with this solution more than or equal to this quantitative light.
4. the method for utilizing light reflection carrying out clear solution accurate quantification according to claim 1 is characterized in that the wavelength of said quantitative light is all light sources that 200-1100nm covered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102071126A CN101881644B (en) | 2010-06-23 | 2010-06-23 | Method for accurately quantifying transparent solution by using light reflection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102071126A CN101881644B (en) | 2010-06-23 | 2010-06-23 | Method for accurately quantifying transparent solution by using light reflection |
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| Publication Number | Publication Date |
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| CN101881644A CN101881644A (en) | 2010-11-10 |
| CN101881644B true CN101881644B (en) | 2012-05-23 |
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| CN2010102071126A Active CN101881644B (en) | 2010-06-23 | 2010-06-23 | Method for accurately quantifying transparent solution by using light reflection |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103076065B (en) * | 2013-01-27 | 2017-05-03 | 中国科学院合肥物质科学研究院 | Laser measuring device for detecting liquid level of liquid metal |
| CN105092308B (en) * | 2015-08-18 | 2018-08-14 | 北京雪迪龙科技股份有限公司 | A kind of quantitative sampling device |
| CN109115305B (en) * | 2018-08-06 | 2019-10-29 | 珠海格力电器股份有限公司 | Tank fill level detection device, method and water purifier |
| CN112161679A (en) * | 2020-10-30 | 2021-01-01 | 阿斯曼尔科技(上海)有限公司 | Measuring method for obtaining liquid level in test tube |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2048207U (en) * | 1989-02-23 | 1989-11-22 | 侯文仪 | Liquid level monitor of lighted liquid surface |
| CN2101218U (en) * | 1991-09-10 | 1992-04-08 | 北京光电技术研究所 | Laser liquid level precise detector |
| CN2108094U (en) * | 1990-06-22 | 1992-06-24 | 石宝 | Photoelectric glass liquid-level controlling instrument |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05332811A (en) * | 1992-05-29 | 1993-12-17 | Anritsu Corp | Liquid level measuring method and liquid level measuring device |
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- 2010-06-23 CN CN2010102071126A patent/CN101881644B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2048207U (en) * | 1989-02-23 | 1989-11-22 | 侯文仪 | Liquid level monitor of lighted liquid surface |
| CN2108094U (en) * | 1990-06-22 | 1992-06-24 | 石宝 | Photoelectric glass liquid-level controlling instrument |
| CN2101218U (en) * | 1991-09-10 | 1992-04-08 | 北京光电技术研究所 | Laser liquid level precise detector |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平5－332811A 1993.12.17 |
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Owner name: SUZHOU JUYANG PRO-ENVIRONMENTAL TECHNOLOGY CO., LT Free format text: FORMER NAME: GUANGZHOU JUYANG PRO-ENVIRONMENT TECHNOLOGY CO., LTD. |
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Address after: Minsheng Road, Suzhou Industrial Park, 215125 Jiangsu province Loufeng No. 88 Patentee after: Suzhou Juyang Pro-Environmental Technology Co., Ltd. Address before: Minsheng Road, Suzhou Industrial Park, 215125 Jiangsu province Loufeng No. 88 Patentee before: Suzhou Juyang Pro-environmental Technology Co., Ltd. |