CN1130560C - Method and device for measuring concentration of flowing solution in real-time mode - Google Patents
Method and device for measuring concentration of flowing solution in real-time mode Download PDFInfo
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- CN1130560C CN1130560C CN 98114661 CN98114661A CN1130560C CN 1130560 C CN1130560 C CN 1130560C CN 98114661 CN98114661 CN 98114661 CN 98114661 A CN98114661 A CN 98114661A CN 1130560 C CN1130560 C CN 1130560C
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Abstract
The present invention relates to a method and a device for measuring the concentration of flowing solution in real time. The method comprises: an optical prism is used for making light have secondary total reflection on a solid-liquid surface according to the principle of optical total reflection, the refractivity of flowing solution is calculated by measuring the included angle of critical rays of the secondary total reflection, and therefore, the concentration of the corresponding solution is calculated. The present invention is suitable for the measurement of the concentration of flowing solution and the real-time high precision measurement of the concentration of solution without influencing the growing environments of the solution.
Description
Technical field
The present invention relates to the optoelectronics field.
Background technology
Solution concentration is to calculate according to the content of solute in solution, and owing to the variation of solute amount, solution concentration also changes in actual applications.The content of directly measuring solute in the solution is unfavorable in many occasions, thereby adopts the method for measuring indirectly to obtain solution concentration numerical value.P.F.Bordui (" In-Line Bulk Supersaturation Measurement By Electrical Conductometry InKDP Crystal Growth From Aqueous Solution ", Journal of Crystal Growth 67 (1984) 168) adopts by measuring the electrical conductivity of solution method and comes real-time calculating K DP solution saturation value; Kuehbergert (Improved product quality at a cooling crystal lization processby measurement and control of supersaturation, Trans IchemE, Vol 75, Part A, February 1997) adopt and in crystallization solution, put into the Peltier-element semiconductor cooling device and observe solute and separate out situation and calculate the solution saturation value in real time; Zhang Kecong (" crystal growth science and technology " Science Press 1997) has introduced employing balancing method, concentration eddy-current method, optical effect method and has come analytical solution whether to be in state of saturation.The measuring method of this additional electric field of Bordui can produce certain influence to aqueous solution ion motion state; And the method for Kuehbergert can influence the topical solutions temperature because of the needs refrigeration; The several method that Zhang Kecong introduces under observation can be subjected to the influence of liquid flow factor and be difficult to use.
Summary of the invention
Purpose of the present invention just is to propose a kind of method for real-time measurement and measurement mechanism that can be used for crystal growing process fluent solution concentration.
According to electromagnetic wave propagation theory, the catadioptric phenomenon can take place in light on the interface of different communication medias, when certain incident angle, to dredge media from the close media of light to light and can produce total reflection phenomenon, the numerical value of this angle is relevant to the refractive index of electromagnetic response with both sides, interface media.For solution, the change of its solutes content, the also variation of ie in solution concentration, can influence solution to electromagnetic response, show the variation of refractive index value on the macroscopic view, can calculate the refractive index value of solution by the size of measuring angle of total reflection angle, thereby calculate the concentration of corresponding solution.
The method that the present invention measures fluent solution concentration is: the optical prism that adopts us to design, by our called after of its function reflecting prism of enjoying a double blessing, its bottom surface (9) contacts with detected solution (8), the light beam that He-Ne laser instrument (1) sends converges at the reflecting prism of enjoying a double blessing (5) through beam expander device (2) and beam splitter (3) by cylindrical mirror (4), (9) locate to produce total reflection for the first time in the bottom surface, afterwards because the effect of reflecting surface (10), light beam return by original route and in the bottom surface (9) locate to produce total reflection for the second time, the angle that produces secondary total reflection critical ray is designated as δ, contracts through beam splitter (3) and light beam through the optical signalling of this process and restraints device (6) and received by optical surface array detector spare CCD (7).By measuring the size of secondary total reflection critical ray angle δ, be calculated as follows the refractive index n of solution to be measured
2:
n
2=n
1N in Sin ((2 α-δ)/2) formula
1Be the refractive index of the reflecting prism of enjoying a double blessing, δ is the angle of secondary total reflection critical ray, and α is the enjoy a double blessing bottom surface (9) of reflecting prism and the angle of cut of reflecting surface (10).According to the corresponding relation of solution concentration and refractive index, just can obtain the concentration of solution.
Measurement mechanism of the present invention is by the reflecting prism of enjoying a double blessing, the He-Ne laser instrument, the beam expander device, beam splitter and cylindrical mirror, the light beam major part such as bundle device etc. that contracts is formed, the enjoy a double blessing bottom surface of reflecting prism contacts with detected solution, and the laser that the He-Ne laser instrument sends is converged at by cylindrical mirror in the reflecting prism of enjoying a double blessing through beam expander device and beam splitter, and its reflected signal is received by the CCD planar array detector after beam splitter and light beam contract the bundle device.
The above-mentioned reflecting prism of enjoying a double blessing (5) is made of polygonal prism; Also can constitute by the oxygon prism.
Above-mentioned light source (1) can adopt the semiconductor laser diode element to replace, and its wavelength is from 532 nanometer to 820 nanometer range.
This invention is compared following characteristics with existing solution concentration measuring method: the growing environment that does not influence solution; Be applicable to the measurement of concetration of fluent solution; And the solution concentration real-time high-precision is measured.
Description of drawings
Accompanying drawing is the fundamental diagram of apparatus of the present invention.
Below be described further with regard to the inventive method and device with reference to the accompanying drawings: the reflecting prism of enjoying a double blessing (5) places detected solution (8), the light beam that He-Ne laser instrument (1) sends converges at the reflecting prism of enjoying a double blessing (5) by cylindrical mirror (4) behind beam expander device (2) and beam splitting device (3), locate to produce the secondary total reflection and returned by original route at solid-liquid interface (9), the secondary total reflection signal that produces through this process contracts through beam splitter (3) and light beam and restraints device (6) and received by optical surface array detector spare CCD (7).
Embodiment
The reflecting prism (5) of enjoying a double blessing places DKDP solution (8), the light beam that He-Ne laser instrument (1) sends converges at the reflecting prism of enjoying a double blessing (5) by cylindrical mirror (4) behind beam expander device (2) and beam splitting device (3), (9) locate to produce total reflection for the first time in the bottom surface, afterwards because the effect of reflecting surface (10), light beam returns by original route and locates to produce total reflection for the second time in (9), the secondary total reflection signal that produces through this process contracts bundle device (6) by optical surface array detector spare CCD (7) reception through beam splitter (3) and light beam, and wherein angle [alpha] is 58.30 degree; The reflecting prism refractive index n of enjoying a double blessing
1Be 1.5957; The numerical values recited of measuring secondary total reflection critical ray angle δ is 0.86 degree.
By formula calculate the detected solution refractive index n
2Be 1.3513, the DKDP solution temperature is 40 ℃, according to the relation of DKDP solution concentration c and refractive index 40 ℃ the time: c=(n
2-1.3266)/0.00129, trying to achieve at this moment, solution concentration percentage by weight numerical value is 19.1%.
Claims (4)
1. the real-time measurement apparatus of a fluent solution concentration, it is characterized in that, this device is by the He-Ne laser instrument as light source (1), beam expander device (2), beam splitter (3), cylindrical mirror (4), the reflecting prism (5) of enjoying a double blessing, light beam contracts and restraints device (6), optical surface array detector spare CCD (7) constitutes, the reflecting prism (5) of enjoying a double blessing places detected solution (8), the light beam that light source (1) sends converges at the reflecting prism of enjoying a double blessing (5) by cylindrical mirror (4) behind beam expander device (2) and beam splitting device (3), locate to produce the secondary total reflection and returned by original route at solid-liquid interface (9), the secondary total reflection signal that produces through this process contracts through beam splitter (3) and light beam and restraints device (6) and received by optical surface array detector spare CCD (7).
2. measurement mechanism as claimed in claim 1 is characterized in that, the described reflecting prism of enjoying a double blessing (5) is made of polygonal prism.
3. measurement mechanism as claimed in claim 1 is characterized in that, the described reflecting prism of enjoying a double blessing (5) is made of the oxygon prism.
4. measurement mechanism as claimed in claim 1 is characterized in that, described light source (1) is a semiconductor laser diode, and its wavelength that sends is between 532 nanometer to 820 nanometer range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98114661 CN1130560C (en) | 1998-06-29 | 1998-06-29 | Method and device for measuring concentration of flowing solution in real-time mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98114661 CN1130560C (en) | 1998-06-29 | 1998-06-29 | Method and device for measuring concentration of flowing solution in real-time mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1240934A CN1240934A (en) | 2000-01-12 |
| CN1130560C true CN1130560C (en) | 2003-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98114661 Expired - Fee Related CN1130560C (en) | 1998-06-29 | 1998-06-29 | Method and device for measuring concentration of flowing solution in real-time mode |
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| CN (1) | CN1130560C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101788448B (en) * | 2010-01-25 | 2011-03-23 | 河南科技大学 | Dynamic speckle measurement method for particle size and concentration change of turbid medium |
| CN105021570B (en) * | 2015-07-15 | 2017-12-19 | 中山市三易测量仪器有限公司 | A kind of liquid concentration detection device |
| CN105021571A (en) * | 2015-07-22 | 2015-11-04 | 哈尔滨工业大学 | Refractive densitometer optical system |
| DE102018200363B3 (en) * | 2018-01-11 | 2019-03-21 | Robert Bosch Gmbh | Measuring device for level monitoring and differential measurement of the optical refractive index |
| CN108507978B (en) * | 2018-05-29 | 2020-12-01 | 绍兴柯桥皓悦纺织科技有限公司 | Domestic self-made drink concentration measuring instrument |
| CN108918464B (en) * | 2018-05-29 | 2020-11-27 | 绍兴柯桥皓悦纺织科技有限公司 | Method for regulating and controlling concentration of brine and syrup based on intelligent water cup for kitchen |
| CN108732131B (en) * | 2018-05-29 | 2020-11-27 | 绍兴柯桥皓悦纺织科技有限公司 | Method for measuring concentration of household self-made drink |
| CN108507980B (en) * | 2018-06-05 | 2020-09-11 | 莆田市烛火信息技术有限公司 | Concentration control method for household self-made drink |
| CN111855490B (en) * | 2020-07-29 | 2021-05-14 | 江南大学 | On-line detection method for concentration of growth solution in crystal growth process |
-
1998
- 1998-06-29 CN CN 98114661 patent/CN1130560C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1240934A (en) | 2000-01-12 |
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