CN104198436B - A kind of light-transmissive fluid concentration detection system and detection method - Google Patents
A kind of light-transmissive fluid concentration detection system and detection method Download PDFInfo
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- CN104198436B CN104198436B CN201410472852.0A CN201410472852A CN104198436B CN 104198436 B CN104198436 B CN 104198436B CN 201410472852 A CN201410472852 A CN 201410472852A CN 104198436 B CN104198436 B CN 104198436B
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Abstract
The invention discloses a kind of light-transmissive fluid concentration detection system, it is characterized in that: tested light-transmissive fluid is enclosed in settling vessel；It is positioned on the inwall of container side and the second illuminator is set, the first illuminator and the 3rd illuminator it is respectively arranged with on the inwall of the container opposite side relative with the second illuminator, the laser beam that the laser instrument of external container sends is projected to the first illuminator, injection conduct detection light after the refraction of the second illuminator and the 3rd illuminator the most successively, photodetector receives detection light light spot position signal, obtains tested light-transmissive fluid concentration through signal processing.Accuracy of detection of the present invention is high, speed is fast, simple in construction, it is easy to operation, and has wider refractive index detection range, can be used for the minor variations of detection strength of fluid real-time, quick.
Description
Technical field
The present invention relates to a kind of light-transmissive fluid concentration detection system and detection method, belong to detection field.
Background technology
Concentration is to weigh a very important index of industrial product quality, is an important physical ginseng of liquid substance
Number.Therefore, in the production of the industries such as chemical industry, medicine, food and in some scientific researches, it is often necessary to accurate quantification is measured
The concentration of predetermined substance in liquid.The method of traditional measurement strength of fluid mainly have hydrometer method, chemical analysis, supercritical ultrasonics technology,
Optical means etc..Although hydrometer method precision is higher, but analytical balance to be used claims repeatedly, and can only detect upper surface solution
Concentration；Chemical analysis has higher accuracy of detection, but its in use spent many chemical reagent is the most high
Expensive, cost is high, and needs the analytical cycle grown very much, it is impossible to meet the requirement of real-time online detection；Though supercritical ultrasonics technology precision is high,
But device therefor weight is big, not easily shifted, and measured strength of fluid wants appropriate, can not the highest can not be the lowest；Optics side
Although method is convenient, fast, cheap and pollution-free, but is easily affected by optical activity, sensitivity, equipment or environment etc., cause degree of accuracy
The highest.These technology need complicated and expensive experimental provision, and cannot be used for working fluid concentration and detect in real time.Sample simultaneously
Time-consuming and loaded down with trivial details, hysteresis quality is big, the result inaccuracy of analysis, it is impossible to meet present industrial actual requirement.
In the patent " liquid concentration detection device and detection method " of publication number 101216422, disclose a kind of detection
The device of strength of fluid and detection method.It utilizes light to reflect in the tight container have euphotic cover plate and refraction, records not
Know refractive index and the concentration of liquid, it is possible to reach quickly to detect the purpose of liquid refractivity, but refraction of light path number of times in this device
Few, Δ d is little for spot displacement, and sensitivity is the highest.
In the patent " a kind of liquid concentration detection device " of publication number 102590098A, use photoelectric cell detection outgoing
The refraction light intensity in face, cost is high, and this system complex is difficult to build.
Paper (optical method salinity measurement technical research [J] based on position sensitive detector. Acta Optica, 2003,23
(11), in: 1379-1383.), scholar changes tested saline by adding a certain amount of high concentration saline in low concentration saline
The method of salinity obtains salinity and luminous point position relationship on light-sensitive detector, and brine salinities to be made is stable, but its process is the longest,
It is unfavorable for that real-time online detects.
Paper (performance evaluation [J] of liquid quality fraction Photodetection system. sensor and micro-system, 2013,31
(11) in: 8-10.), scholar proposes to be optimized light path, and can effectively overcome above lacking by multiple reflections increase light path
Falling into, but the spot displacement that the change of its unit concentration causes is less, sensitivity can not meet requirement.
Summary of the invention
The present invention is to avoid the weak point existing for above-mentioned prior art, it is provided that a kind of light-transmissive fluid concentration detection system
And detection method, to the sensitivity of Photoelectric Detection clear solution concentration can be effectively improved, and realize device miniaturization.Known
With reference in the case of solution refractive index, utilize native system can determine the concentration of clear solution, and solution fast and accurately
Refractive index.
The technical solution adopted for the present invention to solve the technical problems is:
Being structurally characterized in that of light-transmissive fluid concentration detection system of the present invention: the container of a standing, tested light-transmissive fluid are set
It is enclosed in described settling vessel；In the above-described container, it is positioned on the inwall of container side and the second illuminator is set, with described
The first illuminator and the 3rd illuminator it is respectively arranged with on the inwall of the container opposite side that two illuminators are relative, described first reflective
The minute surface of mirror and the 3rd illuminator is parallel to each other and becomes an inclination angle with described second illuminator；On described container side wall, it is in
Described second illuminator be provided above printing opacity form, the lower section being in described second illuminator arranges lower printing opacity form；
The laser beam sent by the laser instrument being arranged on external container is projected to described first from described upper printing opacity form
Illuminator, the refraction light of described first illuminator, successively after the refraction of the second illuminator and the 3rd illuminator, is regarded by lower printing opacity
Window injection conduct detection light；
Photodetector is set for receiving the light spot position signal of described detection light, obtains tested printing opacity through signal processing
Strength of fluid.
The construction features of light-transmissive fluid concentration detection system of the present invention lies also in:
Described laser instrument is the preferable semiconductor laser of the linearity of λ=635nm.
Described photodetector is position sensitive detector PSD or one dimensional linear array Charge Coupled Device (CCD) CCD.
The feature utilizing the method that detecting system of the present invention carries out light-transmissive fluid concentration is to carry out as follows:
Step a, in container, inject the benchmark light-transmissive fluid that known refractive index is n1, the laser light that laser instrument sends is set
Restraint and enter the angle in container from upper form so that incident ray is sequentially passing through the first illuminator, the second illuminator and the 3rd
After the refraction of illuminator, penetrate in lower printing opacity form, and in photodetector, obtain benchmark hot spot positional information；With institute
This detection state of laser instrument and photodetector of stating is for setting detection state；
Step b, the benchmark light-transmissive fluid in container is replaced by standard salt solion, keeps described laser instrument and photoelectricity
Detector, for setting detection state, obtains the facula position information of standard salt solion in photodetector；
Step c, standard salt solion for variable concentrations repeat step b, the corresponding standard salt obtaining variable concentrations
The facula position information of solion, and thus obtain the graph of a relation of facula position information in concentration and photodetector；
Step d, for tested transparency liquid, obtain tested transparency liquid facula position on photodetector by step b
Information, by the comparison with described graph of a relation, obtains the concentration value of tested transparency liquid.
Compared with the prior art, the present invention has the beneficial effect that:
1, laser beam of the present invention multiple reflections in illuminator group, increases light path, amplifies spot displacement Δ d, effectively carries
The detection sensitivity of high transparency solution, reduces the height needed for detecting instrument, compact conformation.
2, the invention belongs to non-contact measurement, the measurement for toxic liquid is safer；
3, present system simple in construction, good stability, employing Position-Sensitive Detector PSD or one dimensional linear array electric charge Rhizoma Nelumbinis are closed
Device CCD gathers information can conveniently and accurately realize the real-time online detection of strength of fluid, and can be extensively in teaching
In with the use of.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is light path Cleaning Principle schematic diagram of the present invention.
Fig. 3 is result after multiple reflections.
Label in figure: 1 laser instrument, printing opacity form on 2,3 containers, 4 first illuminators, 5 second illuminators, 6 the 3rd reflective
Mirror, 7 times printing opacity forms, 8 photodetectors, 9 data collecting cards, 10 computers, rubber stopper bottom 11,12 tapholes, 13 go out
Mouth valve, 14 top rubber plugs, 15 solution inlet port, 16 inlet valves.
Detailed description of the invention
Seeing Fig. 1, in the present embodiment, the version of light-transmissive fluid concentration detection system is: arrange the container 3 of a standing,
The bottom of container 3, by bottom rubber stopper 11 back cover, offers taphole 12 in bottom rubber stopper 11, and at taphole 12
On outlet valve 13 is set, be used for discharging liquid；The top of container 3 is provided with top rubber plug 14, opens on top rubber plug 14
It is provided with solution inlet port 15, solution inlet port 15 is provided with inlet valve 16, for injecting light-transmissive fluid in container 3.
Tested light-transmissive fluid is enclosed in the container 3 of standing；In container 3, it is positioned on the inwall of container side and is provided with
Second illuminator 5, the inwall of the container opposite side relative with described second illuminator 5 is respectively arranged with the first illuminator 4 and
3rd illuminator 6, described first illuminator 4 is parallel to each other with the minute surface of the 3rd illuminator 6 and becomes one with described second illuminator 5
Inclination angle；On described container side wall, be in described second illuminator 5 is provided above printing opacity form 2, is in described second
The lower section of illuminator 5 arranges lower printing opacity form 7；
The laser beam sent by the laser instrument 1 being arranged on external container is projected to described from described upper printing opacity form 2
One illuminator 4, described first illuminator 4 refraction light successively after the refraction of the second illuminator 5 and the 3rd illuminator 6, by under
Printing opacity form 7 injection conduct detection light；
Arrange photodetector 8 for receive detection light light spot position signal, gather through data collecting card 9, and through meter
Calculation machine 10 carries out signal processing and obtains tested light-transmissive fluid concentration.
In being embodied as, laser instrument 1 is the preferable semiconductor laser of the linearity of λ=635nm；Photodetector 8 is
Position sensitive detector PSD or one dimensional linear array Charge Coupled Device (CCD) CCD.
The method carrying out light-transmissive fluid concentration with detecting system in the present embodiment is to carry out as follows:
Step 1, in container, inject the benchmark light-transmissive fluid that known refractive index is n1, the laser that laser instrument 1 sends is set
Light beam enters the angle in container from upper form 2 so that incident ray is sequentially passing through first illuminator the 4, second illuminator 5 and
After the refraction of the 3rd illuminator 6, penetrate in lower printing opacity form 7, and in photodetector 8, obtain benchmark facula position letter
Breath；With this detection state of described laser instrument and photodetector for setting detection state；
Step 2, the benchmark light-transmissive fluid in container is replaced by standard salt solion, keeps described laser instrument and photoelectricity
Detector, for setting detection state, obtains the facula position information of standard salt solion in photodetector 8；
Step 3, standard salt solion for variable concentrations repeat step 2, the corresponding standard salt obtaining variable concentrations
The facula position information of solion, and thus obtain the graph of a relation of facula position information in concentration and photodetector 8；
Step 4, for tested transparency liquid, obtain tested transparency liquid facula position on photodetector 8 by step 2
Information, by the comparison with described graph of a relation, obtains the concentration value of tested transparency liquid.
Fig. 2 shows that measuring principle of the present invention is as follows:
Illustrate as in figure 2 it is shown, fill with in the hermetic container of printing opacity or semi-transparent liquid based on reflective detectable concentration light path
Arranging two pieces with container inner wall is the illuminator at α angle, and the respectively first illuminator 4 and the 3rd illuminator 6, between two pieces of illuminators
Distance be l；The light that laser instrument sends is with angle, θ1Enter to inject solvent cell again with refraction angle θ2Directive the first illuminator 4, Jing Guo
The reflection of one illuminator 4, light is with θ3Angle of reflection is folded to the second illuminator 5, with θ on the second illuminator 54It is reflected into the 3rd
Illuminator 6, through the reflection of the 3rd illuminator 6, light is with angle of reflection θ5It is folded to glass, then with incidence angle θ6Through after glass with
Refraction angle θ7It is irradiated to PSD surface.At the optical path adjusting initial stage, light is allowed vertically to be pointed into PSD.According to light refraction law, incident
The relation of angle and angle of reflection can obtain following relation:
n1sinθ1=n2sinθ2 (1)
θ3=θ2+α (2)
θ4=θ2+2α (3)
n1sinθ7=n2sinθ6 (4)
As it is shown on figure 3, set the light incidence point on the glass vertical dimension to the first illuminator 4 as h1, and light
Inciding for the first time point on the first illuminator 4 to the distance of glass surface is h2, by that analogy, obtain h3,h4, reflect light beam
Detecting target surface light path to PSD after liquid-air boundary reflects is L, if light incidence point on glass and eye point away from
From for w, then can obtain according to trigonometric function:
h4=h3sin(90+α)sin(90-θ4)/sin(90-θ4-α) (6)
L=h2tanθ2+h2tan(θ3+α) (7)
W=h2tanθ2+h2tan(θ3+α)+h4tanθ4+h4tan(θ5+α) (10)
When in container, the refractive index of solution changes, reflection light beam deflects therewith, PSD output beam in the form of voltage
Side-play amount.When solution concentration changes, the light path after change as shown in phantom in FIG., refractive index n2Become n'2, angle, θ2、
θ3、θ4、θ5、θ6、θ7It is changed to θ ' respectively2、θ′3、θ′4、θ′5、θ′6、θ'7, and light incides on the first illuminator 4 for the first time
Point arrives the vertical dimension of glass surface by h2Become h'2, distance w of light incidence point on glass and eye point then becomes w'.
Utilize the angle after change and h2The result similar with w can also be obtained.The Δ d side-play amount obtained on PSD and fluid to be measured
Refractive index difference there is relation one to one, it is thus achieved that liquid refractivity is n'2Time strength of fluid.Then final on PSD
Displacement d that produces because of solution refraction index changing of hot spot be:
Δ d=(w-w') cos θ7+[L+(w-w')sinθ7]tan(θ7-θ′7)
Above derivation is to calculate as a result, it is possible to learn for light primary event in the solution, owing to solution is rolled over
Penetrating rate change and cause the defection signal of micro-beam, mainly by both sides factor, one repeatedly changes in refraction effect and brings；
Another is to make the part of increase owing to increasing solvent cell height.Theory analysis shows, increases the height of solvent cell to suitable
Work as numerical value, and when bigger angle of incidence, PSD signal response is preferably.But made and the shadow of experiment itself by equipment itself
Ring, on the one hand, increase solvent cell height, the solution replacement time can be increased, PSD actual response signal is had the biggest shadow simultaneously
Ring；On the other hand, also can increase the space that instrument itself is shared, make instrument be difficult to miniaturization.Should try one's best during experiment light path design
Increase light is at solvent cell order of reflection, and the structure that can make instrument space is compacter, and obtains preferable resolution.For this
Continue to calculate result of calculation after illuminator secondary reflection and triple reflection.
Fig. 3 be simulation calculate different angle of incidence and through the last reflection of the first illuminator 4 and the 3rd illuminator 6, two
The incidence angle θ that secondary reflection, triple reflection respectively obtain1Graph of a relation with spot displacement Δ d.As seen from Figure 3, through repeatedly
The sensitivity of detecting system can be increased substantially after reflection.
The version that the present embodiment is given is to be respectively arranged with the first illuminator and the 3rd illuminator in left side, if
The number of illuminator is continued to increase in left side, can effectively increase spot displacement, improves the sensitivity of detecting system.When illuminator number
When reaching some, the sensitivity of detecting system can be made to reach the effect in ideal.
The present invention is illustrated by specific implementation process, without departing from the present invention, it is also possible to
Invention is carried out various conversion and equivalent replaces.Therefore, the present invention is not limited to disclosed specific implementation process, and should fall
Enter the whole embodiments in scope of the invention as claimed.
Claims (4)
1. a light-transmissive fluid concentration detection system, is characterized in that: arrange the container of a standing, and tested light-transmissive fluid is enclosed in institute
State in settling vessel；In the above-described container, it is positioned on the inwall of container side and the second illuminator (5) is set, second anti-with described
The first illuminator (4) and the 3rd illuminator (6) it is respectively arranged with on the inwall of the container opposite side that light microscopic (5) is relative, described
One illuminator (4) is parallel to each other with the minute surface of the 3rd illuminator (6) and becomes an inclination angle with described second illuminator (5)；Described
On container side wall, be in described second illuminator (5) is provided above printing opacity form (2), is in described second illuminator
(5) lower section arranges lower printing opacity form (7)；
The laser beam sent by the laser instrument (1) being arranged on external container is projected to described from described upper printing opacity form (2)
One illuminator (4), the reflection light of described first illuminator (4) is successively through the second illuminator (5) and the reflection of the 3rd illuminator (6)
After, by the injection of lower printing opacity form (7) and as detection light；
Photodetector (8) is set and is used for receiving the light spot position signal of described detection light, obtain tested printing opacity through signal processing
Strength of fluid.
Light-transmissive fluid concentration detection system the most according to claim 1, is characterized in that: described laser instrument (1) be λ=
The semiconductor laser of 635nm.
Light-transmissive fluid concentration detection system the most according to claim 1, is characterized in that: described photodetector (8) is position
Put sensitive sensor PSD or one dimensional linear array Charge Coupled Device (CCD) CCD.
4. the method utilizing detecting system described in claim 1 to carry out light-transmissive fluid Concentration Testing, is characterized in that: as follows
Carry out:
Step a, in container, inject the benchmark light-transmissive fluid that known refractive index is n1, the laser light that laser instrument (1) sends is set
Restraint the angle entering in container from upper printing opacity form (2) so that incident ray is sequentially passing through the first illuminator (4), second anti-
After the reflection of light microscopic (5) and the 3rd illuminator (6), injection in lower printing opacity form (7), and obtain in photodetector (8)
Obtain benchmark hot spot positional information；With this detection state of described laser instrument and photodetector for setting detection state；
Step b, the benchmark light-transmissive fluid in container is replaced by standard salt solion, keeps described laser instrument and photodetection
Device, for setting detection state, obtains the facula position information of standard salt solion in photodetector (8)；
Step c, standard salt solion for variable concentrations repeat step b, the corresponding standard salt ion obtaining variable concentrations
The facula position information of solution, and thus obtain the graph of a relation of facula position information in concentration and photodetector (8)；
Step d, for tested transparency liquid, obtain tested transparency liquid at photodetector (8) upper facula position letter by step b
Breath, by the comparison with described graph of a relation, obtains the concentration value of tested transparency liquid.
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| CN110319777A (en) * | 2019-07-20 | 2019-10-11 | 大连理工大学 | A kind of High Precision Long-distance surveys the multiple reflections formula measuring device and method of displacement |
| CN110864998A (en) * | 2019-11-28 | 2020-03-06 | 文武 | Method for testing salt content of crude salt |
| CN111337455B (en) * | 2020-04-17 | 2022-09-23 | 湖南文理学院 | Concentration detection system for electroplating solution |
| TWI777503B (en) * | 2021-04-19 | 2022-09-11 | 林怡男 | Detection device for fluid |
| CN117269080B (en) * | 2023-09-20 | 2024-04-05 | 秦皇岛卓安科技有限公司 | Organic matter detects laser sensor |
| CN116990260A (en) * | 2023-09-27 | 2023-11-03 | 长春电子科技学院 | Alcohol concentration measuring method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4011015A (en) * | 1975-03-25 | 1977-03-08 | Toyo Soda Manufacturing Co., Ltd. | Refractometric densitometer |
| CN101216422A (en) * | 2008-01-16 | 2008-07-09 | 中国科学技术大学 | Liquid concentration detection device and detection method |
| US7619725B1 (en) * | 2008-05-12 | 2009-11-17 | Sealite Engineering, Inc. | Optically amplified critical wavelength refractometer |
| CN101609044A (en) * | 2009-07-24 | 2009-12-23 | 哈尔滨工程大学 | Liquid concentration measuring device and method based on line array CCD and trapezoid glass block |
| CN101995393A (en) * | 2010-09-30 | 2011-03-30 | 哈尔滨工程大学 | Device and method for measuring concentration of liquid based on glass synthetic body and linear array charge-coupled device (CCD) |
| CN102467846A (en) * | 2011-05-22 | 2012-05-23 | 杨兆民 | Measuring device for medium refractive index |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11295220A (en) * | 1998-04-13 | 1999-10-29 | Kdk Corp | Liquid sample inspection method and device |
-
2014
- 2014-09-17 CN CN201410472852.0A patent/CN104198436B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4011015A (en) * | 1975-03-25 | 1977-03-08 | Toyo Soda Manufacturing Co., Ltd. | Refractometric densitometer |
| CN101216422A (en) * | 2008-01-16 | 2008-07-09 | 中国科学技术大学 | Liquid concentration detection device and detection method |
| US7619725B1 (en) * | 2008-05-12 | 2009-11-17 | Sealite Engineering, Inc. | Optically amplified critical wavelength refractometer |
| CN101609044A (en) * | 2009-07-24 | 2009-12-23 | 哈尔滨工程大学 | Liquid concentration measuring device and method based on line array CCD and trapezoid glass block |
| CN101995393A (en) * | 2010-09-30 | 2011-03-30 | 哈尔滨工程大学 | Device and method for measuring concentration of liquid based on glass synthetic body and linear array charge-coupled device (CCD) |
| CN102467846A (en) * | 2011-05-22 | 2012-05-23 | 杨兆民 | Measuring device for medium refractive index |
Non-Patent Citations (2)
| Title |
|---|
| 基于位置敏感器件的光学法盐度检测技术研究;赵勇 等;《光学学报》;20031130;第23卷(第11期);第1379-1383页 * |
| 溶液质量分数光电探测系统的性能分析;薛长国 等;《传感器与微系统》;20121231;第31卷(第11期);第8-10页 * |
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