CN203949870U - A kind of liquid physical and chemical parameter measurement mechanism based on fluorescence analysis - Google Patents
A kind of liquid physical and chemical parameter measurement mechanism based on fluorescence analysis Download PDFInfo
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- CN203949870U CN203949870U CN201420356159.2U CN201420356159U CN203949870U CN 203949870 U CN203949870 U CN 203949870U CN 201420356159 U CN201420356159 U CN 201420356159U CN 203949870 U CN203949870 U CN 203949870U
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Abstract
The utility model discloses a kind of liquid physical and chemical parameter measurement mechanism based on fluorescence analysis, belong to field of measuring technique.Measurement mechanism of the present utility model mainly comprises following improvement: one, by multiple to the sensitive fluorescent mass integration of different liquids physical and chemical parameter sensitivity on a sensitive fluorescent element, and utilize different light band pass filters to extract the fluorescence of the corresponding physical and chemical parameter information of reflection, then the fluorescence intensity extracting is analyzed, can be realized multiple physical and chemical parameter is carried out to Measurement accuracy; Two, increase the physical defoaming device based on capillary structure, and combined with existing chemical froth breaking means, can effectively eliminate the impact on measuring accuracy of bubble in testing liquid; Three, the light path of utilizing three ports light rings to carry out between fluorescence excitation light source, sensitive fluorescent element, fluorescence reception module connects, avoid the doping coupling between exciting light and fluorescence, and utilize optical fiber collimator to process exciting light and fluorescence, further improve measuring accuracy.
Description
Technical field
The utility model relates to a kind of liquid physical and chemical parameter measurement mechanism, relates in particular to a kind of liquid physical and chemical parameter measurement mechanism based on fluorescence analysis, belongs to field of measuring technique.
Background technology
The object of analyzing in environment, monitor is the material of trace, ultramicron often, has and much also has timeliness and spatiality, therefore requires more and more higher to measuring technique.Along with the development of optical sensor, optical measuring method is subject to widespread use in field of measuring technique.The advantages such as fluorometry is highly sensitive with it, detectability is low, accuracy is good have obtained developing rapidly in recent years, as this method can be widely used in online water quality monitoring.
Dissolved oxygen DO, it is aquatic animals and plants existence necessary condition, and the detection of oxygen in water concentration is all had very important significance at aspects such as industry, medical science and environmental areas.In recent years, along with the development of optical sensor, a kind of optical measuring method based on Fluorescence Quenching Principle has substituted traditional iodimetric titration and oxygen electrode method gradually.The disclosed Chinese patent of the people such as Xiong Yan, Guan Yafeng (publication number: CN 101713734 A) has been described a kind of optical fiber oxygen sensor of the real-time online based on Fluorescence Quenching Principle, this sensor uses V-type optical fiber to carry out exciting light transmission and fluorescence reception, terminal connection carrier glass sheet and oxygen-sensitive fluorescent membrane, a Zhi Duanwei excitation fiber connects light source, and another end connects photodetector for receiving optical fiber.The shortcoming of this detecting strategy is input light and excites between the fluorescence of generation and occur that sometimes doping mixes, and can not effectively separate, and this will make the fluorescence that detects inaccurate, thereby will propose higher requirement to process structure design.The disclosed patents of people (publication number: CN 101586990 A) such as first phoenix is red, Yang person of outstanding talent are based on Fluorescence Quenching Principle equally, use U-shaped plastic optical fiber transmission exciting light and fluorescence, its shortcoming is that the coupling efficiency of exciting light, fluorescence and optical fiber is lower, thereby the fluorescence signal that photodetector is received is little, be unfavorable for surveying.In addition, the structure of discrete detection, is easily subject to the impact of the factors such as environmental change.
Further, a lot of online water quality measurement systems, as dissolved oxygen sensing system, it has only considered single physical and chemical parameter, as salinity in temperature, pH value, water etc., on the impact of measuring system, seldom realize multi parameter simultaneous measuring, even if there is small part measuring system to realize, be also more to measure by be furnished with related sensor in measuring system, as temperature sensor, salinity sensor, this will hinder the structural design of measuring system integral type widely, brings mutual interference problem between different sensors, and integrated level is lower.
In addition, underwater bubble is the influence factor that many dissolved oxygen sensing systems are not considered.In the time that bubble appears in flowing liquid surface, bubble will be adsorbed on the surface of fiber-optic sensor probe, is known by the optical characteristics of bubble, and bubble can make the incident light coming from Optical Fiber Transmission and excite fluorescence generation scattering, the refraction of generation.Because fluorescence itself is just very faint, thereby will greatly reduce the receiving efficiency of fluorescence.In addition, in the principal ingredient of underwater bubble, also comprise oxygen molecule, hydrophyte produces oxygen by photosynthesis, in the time that oxygen in water concentration is saturated, will form bubble by bubbing, and number of bubbles much will affect the stability of dissolved oxygen sensing system, the dissolved oxygen concentration numerical value of measurement has just comprised the concentration of the oxygen molecule of a part in bubble, causes measurement result inaccurate.
Utility model content
Technical problem to be solved in the utility model is to overcome prior art deficiency, a kind of liquid physical and chemical parameter measurement mechanism based on fluorescence analysis is provided, can accurately measure multiple physical and chemical parameters such as oxygen concentration, temperature, pH values simultaneously, and there is higher level of integrated system, more compact structure.
The utility model solves the problems of the technologies described above by the following technical solutions:
A kind of liquid physical and chemical parameter measurement mechanism based on fluorescence analysis, comprise: fluorescence excitation light source, sensitive fluorescent element, fluorescence reception module, signal are processed and control module, and sensitive fluorescent element is connected with fluorescence excitation light source, fluorescence reception module light path respectively; Zones of different on described sensitive fluorescent element is coated with
nplant the sensitive fluorescent material to different liquid physical and chemical parameter sensitivities,
nfor being greater than 1 natural number, and this
nunder irradiating, the exciting light that kind sensitive fluorescent material all can send at fluorescence excitation light source produces fluorescence; In light path between fluorescence excitation light source and sensitive fluorescent element, be provided with the first switchgear, can signal process and the control of control module under make described in exciting light that fluorescence excitation light source sends is only radiated at
nplant in the one in sensitive fluorescent material; Described fluorescence reception module comprise second switch device, photodetector and
nindividual light band pass filter, Qi Zhong
ithe passband centre wavelength of individual light band pass filter equals
ithe wavelength at peak value place in the fluorescence spectrum of kind sensitive fluorescent material,
, the fluorescence that second switch device can produce sensitive fluorescent element under the control of signal processing and control module only passes through
nin individual light band pass filter one exports signal to by the fluorescence of light band pass filter and processes and control module after photodetector is converted to electric signal; Signal is processed and control module is used for the first switchgear, second switch device to control, and draws the physical and chemical parameter of testing liquid according to received fluorescence intensity information.
In order effectively to eliminate the bubble in testing liquid, thereby improving measurement accuracy, the utility model further proposes the following technical scheme of improving: this measurement mechanism also comprises the defoaming device for eliminating testing liquid bubble, described defoaming device comprises the hollow structure in the flow passage that is arranged at testing liquid, described hollow structure is along being provided with one group of tip-like structure on two sides of flow passage direction, each tip-like inside configuration at least exists one to be communicated with capillary channel outside and hollow structure internal cavities, testing liquid can only be by these capillary channels by described hollow structure.
Further, described defoaming device also comprises the container that is contained with chemical defoamer that is arranged in described flow passage and is positioned at described hollow structure front end, and the chemical defoamer in this container can enter at testing liquid testing liquid during by this container.
Preferably, described in
nplant the sensitive fluorescent material of different liquid physical and chemical parameter sensitivities is comprised to the sensitive fluorescent material to liquid oxygen concentration, fluid temperature, liquid pH value sensitivity.Preferably, the described sensitive fluorescent material to liquid oxygen concentration, fluid temperature, liquid pH value sensitivity is followed successively by: ruthenium complex, rare earth luminescent material, shitosan fluorescent nano material.
For fear of the impact of doping coupling on measuring accuracy between exciting light and fluorescence, the utility model further proposes the following technical scheme of improving: described sensitive fluorescent element is connected with fluorescence excitation light source, fluorescence reception module light path respectively by three port circulators, and fluorescence excitation light source, sensitive fluorescent element, fluorescence reception module are connected with first, second, third port of described three port circulators respectively.
Further, sensitive fluorescent element and three port circulators be connected light path in be also in series with an optical fiber collimator.
Compared to existing technology, the technical solution of the utility model and further improvement project thereof have following beneficial effect:
Sensitive fluorescent element of the present utility model the is integrated multiple sensitive fluorescent material to different liquids physical and chemical parameter sensitivity, and utilize different light band pass filters to extract the fluorescence of the corresponding physical and chemical parameter information of reflection, then utilize fluorescence analysis method to analyze the fluorescence intensity extracting, thereby can realize, multiple physical and chemical parameter is carried out to Measurement accuracy, significantly improve level of integrated system, and avoided the phase mutual interference between different sensors simultaneously;
The utility model proposes a kind of physical defoaming device based on capillary structure, can effectively eliminate the impact on measuring accuracy of bubble in testing liquid; The utility model also can be combined above-mentioned physical defoaming device with existing chemical froth breaking means, thereby further improves the effect that bubble is eliminated;
The light path that the utility model utilizes three ports light rings to carry out between fluorescence excitation light source, sensitive fluorescent element, fluorescence reception module connects, avoid the doping coupling between exciting light and fluorescence, and utilize optical fiber collimator to process exciting light and fluorescence, further improve the measuring accuracy of fluorescence analysis method.
Brief description of the drawings
Fig. 1 is the structural profile schematic diagram of the physical and chemical parameter of the utility model liquid described in embodiment measurement mechanism, and wherein each label implication is as follows:
1, light source; 2, light source driving circuit plate; 3, heat radiator; 4, modulation of source module; 5, signals collecting and control circuit board; 6, excitation fiber; 7, receive optical fiber; 8, optical filter; 9, condenser lens; 10, photodetector; 11, optical fiber circulator; 12, optical fiber collimator; 13, seal casinghousing; 14, optical branching device; 15, column structure; 16, photoswitch; 16 ', photoswitch; 17, black light division board; 18, watertight glass sheet; 19, sensitive fluorescent membrane; 20, liquid communication pipe; 21, tip-like structure; 22, hollow structure; 23, rubber stopper; 24, defoaming device housing; 25, capillary channel; 26, small-sized vessel; 27, inlet valve; 28, sample cell; 29, exhaust tube; 30, cylinder vent port; 31, aspiration pump; 32, vent cap; 33, measurement mechanism housing; 34, fixed screw; 35, suspension ring handle; 36, communication cable; 37, display screen; 38, communication interface; 39, PC.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is elaborated:
The utility model is for prior art deficiency, a kind of liquid physical and chemical parameter measurement mechanism based on fluorescence analysis has been proposed, mainly comprise that following three aspects: improves: one, by multiple to the sensitive fluorescent mass integration of different liquids physical and chemical parameter sensitivity on a sensitive fluorescent element, and utilize different light band pass filters to extract the fluorescence of the corresponding physical and chemical parameter information of reflection, then utilize existing fluorescence analysis method to analyze the fluorescence intensity extracting, thereby can realize simultaneously, multiple physical and chemical parameter is carried out to Measurement accuracy; Two, increase the physical defoaming device based on capillary structure, and combined with existing chemical froth breaking means, can effectively eliminate the impact on measuring accuracy of bubble in testing liquid; Three, the light path of utilizing three ports light rings to carry out between fluorescence excitation light source, sensitive fluorescent element, fluorescence reception module connects, avoid the doping coupling between exciting light and fluorescence, and utilize optical fiber collimator to process exciting light and fluorescence, further improve the measuring accuracy of fluorescence analysis method.
Fig. 1 has shown a preferred embodiment of the utility model liquid physical and chemical parameter measurement mechanism.This measurement mechanism mainly comprises following five parts: fluorescence excitation light source, sensitive fluorescent element, fluorescence reception module, signal processing and control module and defoaming device.
As shown in Figure 1, fluorescence excitation light source part comprises light source 1, light source driving circuit plate 2, heat radiator 3, modulation of source module 4, excitation fiber 6, light source driving circuit plate 2 is luminous and export the first port of three fiber port circulators 11 to by excitation fiber 6 for driving light source 1, and modulation of source module 4 is for regulating the light emitted wavelength of light source 1.Light source 1 in this enforcement adopts xenon source, and spectral range is 250-1500nm, and power is 150W, and the light wavelength that excites of output is 455nm.
Sensitive fluorescent element of the present utility model is the sensitive fluorescent membrane 19 that is coated on watertight glass sheet 18 surfaces shown in Fig. 1, sensitive fluorescent membrane 19 comprises three kinds of different sensitive fluorescent materials to dissolved oxygen DO, temperature, pH value sensitivity respectively, can be prepared and be coated on by sol-gel technique the lower surface of watertight glass sheet.As shown in the figure, watertight glass sheet 18 is divided into 3 regions, each region surface applies a kind of sensitive fluorescent material, in order to prevent that exciting light from irradiating different sensitive fluorescent materials simultaneously, by vertical black light division board 17 is set, 3 region separation of watertight glass sheet 18 is come.In light path between the second port and the sensitive fluorescent element of three fiber port circulators 11, be disposed with optical fiber collimator 12, optical branching device 14, photoswitch 16, the exciting light of exporting from the second port of three fiber port circulators 11 is divided into three tunnels by optical branching device 14 after optical fiber collimator collimation, Zhe San road light exports respectively 3 regions of watertight glass sheet 18 to via photoswitch 16, the corresponding region of each road light; Photoswitch 16 any Yi Luhuoji road in can or closing Zhe San road light at gating under external control.As shown in the figure, for waterproof, optical fiber collimator 12 in the present embodiment, optical branching device 14, photoswitch 16, black light division board 17, watertight glass sheet 18 are packaged in seal casinghousing 13, sensitive fluorescent membrane 19 be positioned at seal casinghousing 13 bottom and can with external contact.
Described sensitive fluorescent material can be selected from the various sensitive fluorescent materials of existing discovery, in the present embodiment, the fluorescent material of dissolved oxygen DO sensitivity is selected to ruthenium complex, as three (4,7-biphenyl-1,10-phenanthroline) ruthenous chloride (Ru (dpp)
3cl
2), thermally sensitive fluorescent material is selected rare earth luminescent material, as Y
2o
2s:Eu+Fe
2o
3, select shitosan fluorescent nano material as naphthalimide modification CMC CMCS3N to the fluorescent material of pH value sensitivity.Above-mentioned sensitive fluorescent material is current material, can be referring to document (Zhou Dongqiu about its detailed introduction, Xiao Shaorong, Xiao Lin. the fiber optic dissolved oxygen sensor [J] based on Fluorescence Quenching Principle. optics and photoelectric technology, 2013, 11(4): 64-66., Bai Haiying, Wang Jimin. the fluorescence optical fiber temperature-sensing system [J] based on novel rare-earth luminescent material. sensing technology journal, 2004, (4): 660-662., Yu Hui, Liang Shucai, Zhong Haidi, Deng. the preparation of novel chitosan fluorescence nano grain and PH sensitive property research [J]. analytical chemistry research notes, 2011, 39(3): 409-413.).For convenience of explanation, the present embodiment has only been enumerated the sensitive fluorescent material to dissolved oxygen DO, temperature, these three kinds of liquid physical and chemical parameter sensitivities of pH value, in fact, can also continue to increase for example, sensitive fluorescent material to other liquid physical and chemical parameter sensitivity (salinity), thus the measurement range of expansion the utility model measurement mechanism.
Fluorescence reception module in the present embodiment, as shown in Figure 1, comprise receive optical fiber 7, photoswitch 16 ', three tablet filters 8, three condenser lenses 9, three photodetectors 10, wherein three tablet filters 8 are light band pass filter, its passband centre wavelength equals respectively the wavelength at peak value place in the fluorescence spectrum of three kinds of sensitive fluorescent materials, in the present embodiment, be respectively 615nm, 630nm, 534nm, correspond respectively to the extraction of the sensitive fluorescent fluorescence that material sends to dissolved oxygen DO, temperature, pH value sensitivity.Receive the fluorescence that receives from the 3rd port of three fiber port circulators 11 of optical fiber 7 first pass through photoswitch 16 ', photoswitch 16 ' three output ports be connected with three tablet filters 8 respectively, after every tablet filter 8, connect successively a slice condenser lens 9 and a photodetector 10.Photoswitch 16 ' can be at any road optical filter 8 of gating under external control.The fluorescence of the 3rd port output of three fiber port circulators 11 after the optical filter 8 of institute's gating filters again line focus lens 9 converge, be finally converted to electric signal by photodetector 10 and export signal to and process and control module.Photodetector 10 in the present embodiment is photomultiplier, wavelength detection scope: 185nm-900nm, side window type.
Signal in the present embodiment is processed and control module is signals collecting and control circuit board 5, its respectively with photoswitch 16, photoswitch 16 ', three photodetector 10 signals are connected, can be respectively to photoswitch 16 and photoswitch 16 ' control, and relation curve or function between the voltage signal that received photodetector 10 is exported and default dissolved oxygen concentration, temperature, pH value and voltage signal compare, draw dissolved oxygen concentration, temperature, the pH value information of testing liquid.In the present embodiment, signals collecting and control circuit board 5 also can communicate by communication cable 36 and outside PC 39, and PC 39 comprises display screen 37 and communication interface 38.
Defoaming device in the present embodiment comprises chemical froth breaking and physical defoaming two parts, and its structure as shown in Figure 1, comprises defoaming device housing 24.Defoaming device housing 24 upper end left and right sides are respectively provided with for fixing and the stainless steel column structure 15 being connected, and, defoaming device housing 24 upper ends and seal casinghousing 13 are interfixed in the lower end of measurement mechanism housing 33 for fixing air-vent simultaneously.The bottom of defoaming device housing 24 is provided with inlet valve 27.Bottom in defoaming device housing 24 is provided with two for holding the uncovered small-sized vessel 26 of chemical defoamer, liquid communication pipe 20 that can be by running through defoaming device housing 24 and measurement mechanism housing 33 by outside to the chemical defoamer of annotating in small-sized vessel 26.The middle part of defoaming device housing 24 is provided with a hollow structure 22, between its outer rim and defoaming device housing 24, realizes sealing by rubber stopper 23, and liquid cannot be passed through.As shown in the figure, the upper and lower surface of hollow structure 22 is respectively arranged with one group of tip-like structure 21, the inside of each tip-like structure 21 is provided with the capillary channel 25 of the internal cavities of at least one connection outside and hollow structure 22, connection is realized by himself internal cavities and these capillary channels 25 in the both sides up and down of hollow structure 22, owing to sealing between the outer rim of hollow structure 22 and defoaming device housing 24, therefore the liquid in defoaming device can only pass through via these capillary channels 25.The top of defoaming device housing 24 is provided with through measurement mechanism housing 33 and is communicated with outside cylinder vent port 30, and the outer setting of cylinder vent port 30 has the vent cap 32 that can open and close.Described chemical defoamer can adopt various existing defoamers, the preferred absolute ethyl alcohol of the utility model, absolute ethyl alcohol is as a kind of chemical defoamer, there is good defoaming effect, ethanol has volatility simultaneously, it will be along with the continuation of air-flow is risen and volatilize, and so just can avoid oxygen molecule to be also dissolved in ethanol and cause measuring error.Described hollow structure 22 and small-sized vessel 26 preferably adopt the resistant materials such as pottery, glass to make.
Above-mentioned defoaming device in use, defoaming device is put into sample cell 28, first by liquid communication pipe 20 to the chemical defoamer of annotating in small-sized vessel 26, then open vent cap 32, and by exhaust tube 29, cylinder vent port 30 is connected with aspiration pump 31, aspiration pump 31 is outwards bled, testing liquid in sample cell 28 is entered defoaming device and is risen gradually by inlet valve 27, in the time that liquid level exceedes the upper limb of small-sized vessel 26, chemical defoamer enters testing liquid, realizes chemical froth breaking.Along with liquid level continues rise and pass through hollow structure 22, remaining bubble also disappearance of refinement gradually under the effect of tip-like structure 21 and capillary channel 25 in liquid.This defoaming device has proposed a kind of physical defoaming structure based on capillary structure, and combines with existing chemical froth breaking means, can effectively eliminate the bubble in liquid.
For the ease of using, be also fixed with suspension ring handle 35 in the upper end of measurement mechanism housing 33 by fixed screw 34.
Further understand technical solutions of the utility model for the ease of the public, the using method to above-mentioned measurement mechanism and the course of work are carried out brief description below.
Measurement mechanism is placed in sample cell 28 by step 1, utilization hanging handle 35, open liquid communication pipe 20, open cylinder vent cap 32, inject a small amount of absolute ethyl alcohol to small-sized vessel 26 by liquid communication pipe 20, then open inlet valve 27, utilize aspiration pump 31 slowly to extract the gas in defoaming device, to extraneous exhaust, testing liquid will slowly enter into defoaming device by inlet valve 27, first flowing liquid contacts the absolute ethyl alcohol in small-sized vessel 26, under its effect, bubble can be eliminated gradually.Simultaneously ethanol has volatility, and it will be along with the continuation of air-flow is risen and volatilize, and so just can avoid oxygen molecule to be also dissolved in ethanol and causes measuring error.Along with liquid continues to flow, when when the hollow structure 22, under the effect of tip-like structure 21 and capillary channel 25, bubble can be by refinement gradually until eliminate.Flowing liquid, under the effect of two cover froth breaking operations, will reach the best effects that reduces the bubble in liquid.
Step 2, utilizes signals collecting and control circuit board 5 to send pulse command driving light source modulation module 4 and light source driving circuit 2, and light source 1 is modulated, and light source driving circuit provides stably power stage for it.Exciting light after modulation is transferred to the first port of three fiber port circulators 11 through excitation fiber 6, then output to optical fiber collimator 12 from the second port of three fiber port circulators 11, light from the collimation of optical fiber collimator 12 outgoing is divided into three-beam under the effect of optical branching device 14, first control photoswitch 16, make a wherein road photoconduction logical (supposing that it is corresponding to the sensitive fluorescent material to dissolved oxygen DO sensitivity), two-way closure in addition, exciting light will incide through watertight glass sheet 18 on the sensitive fluorescent material of dissolved oxygen DO sensitivity, produce the fluorescence that spectral range is about 585-630nm, feed back to optical fiber collimator 12, be that optical fiber collimator is simultaneously as exciting light input and fluorescence reception device, can make fluorescence be coupled in maximum efficiency photodetector, also avoided well discrete detecting structure to be subject to the impact of environmental change.
Step 3, fluorescence is the 3rd port output from three fiber port circulators 11 through optical fiber collimator 12, the fluorescence of exporting from the 3rd port of three fiber port circulators is coupled to and receives optical fiber 7, again by control photoswitch 16 ', make the light band pass filter 8 that fluorescence is 615nm through passband centre wavelength, from selecting the wavelength that fluorescence is the strongest, after corresponding condenser lens 9 focuses on, received by photodetector 10 again, fluorescence signal is converted into electric signal.
Step 4, the electric signal that photodetector 10 receives is processed through signals collecting and control circuit board 5, corresponding relation between voltage signal and default dissolved oxygen concentration and voltage is compared, draw dissolved oxygen concentration information, and information after treatment is delivered to PC, show or continue by PC and transmit to far-end.
Step 5, adopts above-mentioned identical method to measure temperature, pH value, and hockets and repeatedly measure to improve accuracy of measurement.
Step 6, does corresponding compensation by the temperature measuring, pH value data by algorithm for design, reduces dissolved oxygen concentration measuring error, improves measuring accuracy.
Relation between above-mentioned dissolved oxygen concentration/temperature/pH value and voltage can be demarcated in advance by experiment, only carries out brief description with the example that is demarcated as of the relation between dissolved oxygen concentration and voltage below:
Step 1, in sample pool, inject the water of certain volume, detect initial dissolution oxygen concentration value with standard dissolved oxygen instrument;
Step 2, use the utility model measurement mechanism are measured the corresponding magnitude of voltage of initial dissolution oxygen concentration;
Step 3, in water, slowly pass into oxygen, improve the concentration of oxygen in water, use standard dissolved oxygen detector to detect one group of dissolved oxygen concentration value under variable concentrations condition, detect corresponding magnitude of voltage under variable concentrations condition with the utility model measurement mechanism simultaneously;
Step 4, one group of obtained dissolved oxygen concentration value-voltage value data is carried out to matching, can obtain the relation between magnitude of voltage and dissolved oxygen concentration value that the utility model measurement mechanism measures.
The demarcation of the relation between other physical and chemical parameter value and measuring voltage value similarly, repeats no more herein.
Claims (8)
1. the liquid physical and chemical parameter measurement mechanism based on fluorescence analysis, comprise: fluorescence excitation light source, sensitive fluorescent element, fluorescence reception module, signal are processed and control module, and sensitive fluorescent element is connected with fluorescence excitation light source, fluorescence reception module light path respectively; It is characterized in that, the zones of different on described sensitive fluorescent element is coated with
nplant the sensitive fluorescent material to different liquid physical and chemical parameter sensitivities,
nfor being greater than 1 natural number, and this
nunder irradiating, the exciting light that kind sensitive fluorescent material all can send at fluorescence excitation light source produces fluorescence; In light path between fluorescence excitation light source and sensitive fluorescent element, be provided with the first switchgear, can signal process and the control of control module under make described in exciting light that fluorescence excitation light source sends is only radiated at
nplant in the one in sensitive fluorescent material; Described fluorescence reception module comprise second switch device, photodetector and
nindividual light band pass filter, Qi Zhong
ithe passband centre wavelength of individual light band pass filter equals
ithe wavelength at peak value place in the fluorescence spectrum of kind sensitive fluorescent material,
, the fluorescence that second switch device can produce sensitive fluorescent element under the control of signal processing and control module only passes through
nin individual light band pass filter one exports signal to by the fluorescence of light band pass filter and processes and control module after photodetector is converted to electric signal; Signal is processed and control module is used for the first switchgear, second switch device to control, and draws the physical and chemical parameter of testing liquid according to received fluorescence intensity information.
2. liquid physical and chemical parameter measurement mechanism as claimed in claim 1, it is characterized in that, this measurement mechanism also comprises the defoaming device for eliminating testing liquid bubble, described defoaming device comprises the hollow structure in the flow passage that is arranged at testing liquid, described hollow structure is along being provided with one group of tip-like structure on two sides of flow passage direction, each tip-like inside configuration at least exists one to be communicated with capillary channel outside and hollow structure internal cavities, and testing liquid can only be by these capillary channels by described hollow structure.
3. liquid physical and chemical parameter measurement mechanism as claimed in claim 2, it is characterized in that, described defoaming device also comprises the container that is contained with chemical defoamer that is arranged in described flow passage and is positioned at described hollow structure front end, and the chemical defoamer in this container can enter at testing liquid testing liquid during by this container.
4. liquid physical and chemical parameter measurement mechanism as claimed in claim 3, is characterized in that, described chemical defoamer is absolute ethyl alcohol.
5. liquid physical and chemical parameter measurement mechanism as described in claim 1～4 any one, is characterized in that, described in
nplant the sensitive fluorescent material of different liquid physical and chemical parameter sensitivities is comprised to the sensitive fluorescent material to liquid oxygen concentration, fluid temperature, liquid pH value sensitivity.
6. liquid physical and chemical parameter measurement mechanism as claimed in claim 5, is characterized in that, the described sensitive fluorescent material to liquid oxygen concentration, fluid temperature, liquid pH value sensitivity is followed successively by: ruthenium complex, rare earth luminescent material, shitosan fluorescent nano material.
7. liquid physical and chemical parameter measurement mechanism as described in claim 1～4 any one, it is characterized in that, sensitive fluorescent element is connected with fluorescence excitation light source, fluorescence reception module light path respectively by three port circulators, and fluorescence excitation light source, sensitive fluorescent element, fluorescence reception module are connected with first, second, third port of described three port circulators respectively.
8. liquid physical and chemical parameter measurement mechanism as claimed in claim 7, is characterized in that, sensitive fluorescent element and three port circulators be connected light path in be also in series with an optical fiber collimator.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089933A (en) * | 2014-06-27 | 2014-10-08 | 南京信息工程大学 | Liquid physical and chemical parameter measuring device based on fluorescence analysis |
| CN105259153A (en) * | 2015-11-03 | 2016-01-20 | 重庆大学 | Device for liquid detection |
| CN105372183A (en) * | 2015-11-03 | 2016-03-02 | 重庆大学 | Liquid detecting reaction chamber |
| CN105424608A (en) * | 2015-11-03 | 2016-03-23 | 重庆大学 | Dual-signal visualization gas-liquid-dual-system detection device |
| CN110146493A (en) * | 2018-02-11 | 2019-08-20 | 博阳生物科技（上海）有限公司 | A kind of light path detection and the light-induced chemiluminescent detector with the system |
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2014
- 2014-06-27 CN CN201420356159.2U patent/CN203949870U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089933A (en) * | 2014-06-27 | 2014-10-08 | 南京信息工程大学 | Liquid physical and chemical parameter measuring device based on fluorescence analysis |
| CN104089933B (en) * | 2014-06-27 | 2016-05-11 | 南京信息工程大学 | A kind of liquid physical and chemical parameter measurement mechanism based on fluorescence analysis |
| CN105259153A (en) * | 2015-11-03 | 2016-01-20 | 重庆大学 | Device for liquid detection |
| CN105372183A (en) * | 2015-11-03 | 2016-03-02 | 重庆大学 | Liquid detecting reaction chamber |
| CN105424608A (en) * | 2015-11-03 | 2016-03-23 | 重庆大学 | Dual-signal visualization gas-liquid-dual-system detection device |
| CN105259153B (en) * | 2015-11-03 | 2017-10-10 | 重庆大学 | Device for liquid detecting |
| CN105424608B (en) * | 2015-11-03 | 2017-11-03 | 重庆大学 | Dual signal visualizes gas-liquid Dual system detection means |
| CN105372183B (en) * | 2015-11-03 | 2017-11-03 | 重庆大学 | Liquid detecting reative cell |
| CN110146493A (en) * | 2018-02-11 | 2019-08-20 | 博阳生物科技（上海）有限公司 | A kind of light path detection and the light-induced chemiluminescent detector with the system |
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