CN207894818U - A kind of water quality detecting device - Google Patents
A kind of water quality detecting device Download PDFInfo
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- CN207894818U CN207894818U CN201721632946.5U CN201721632946U CN207894818U CN 207894818 U CN207894818 U CN 207894818U CN 201721632946 U CN201721632946 U CN 201721632946U CN 207894818 U CN207894818 U CN 207894818U
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Abstract
The utility model discloses a kind of water quality detecting devices, including first light source device, second light source device and detection device, the first light source device is in parallel with light path where second light source device and is connect by photosynthetic bundle device progress light path, the photosynthetic bundle device rear light path is equipped with light beam splitting arrangement, the photosynthetic bundle device, light beam splitting arrangement and detection device are sequentially arranged along light path, the utility model has the beneficial effects that：The utility model measures the absorption spectrum of water sample using photo-thermal effect, sample generates characteristic variations in the case where pumping photoinduction, for no other reason than that caused by absorption of the sample to pump energy, therefore, measured signal only reflects that the absorption characteristic of sample, the scattering of sample surfaces and inside do not have an impact measurement result.It is compared with other spectroscopic analysis methods, eliminates influence of the scattering to measurement result, thus measurement result is more reliable, and also detection sensitivity is high.
Description
Technical field
The utility model is related to water quality detection authentication technique field, specifically a kind of water quality detecting devices.
Background technology
Water quality safety is related to everyone life and health, is the most important thing.Thus to the detection and identification skill of the safety of water source
The demand of art is also very urgent.
Spectra methods is a kind of common water quality detection method and traditional chemical analysis, electrochemical analysis and color
The water quality detection methods such as spectrum analysis are compared, spectrum analysis have easy to operate, high certainty of measurement, reproducible, detection efficiency is high
The advantages that.Current most common spectroscopic analysis methods have spectrophotometry, Raman spectroscopy etc., but these methods have not
Foot.It is typically the variation for the intensity for directly measuring the light through sample in spectrophotometry, further according to bright Bobi（Lambert-
Beer）Law obtains the absorptivity and absorption spectrum of sample, to obtain in detected water sample all kinds of impurity of institute and
The information of pollutant, this is a kind of indirect absorption measurement method.But this method is when being detected weak absorbing sample,
Will produce bigger error, main error source is the scattering of sample surfaces and sample interior to light, such as in water it is contained
Impurity, finely ground particles etc..Because the light intensity variation caused by this partial dispersion is often calculated within absorption, work as sample
When product absorb very weak, this can cause bigger detection error.Raman spectrum is by Raman scattering caused by sample molecule
Effect is detected, to obtain the structure feature in relation to sample molecule.Different molecular structures corresponds to different Raman signatures
Spectral line.But the efficiency of Raman scattering itself is very low, scattering light it is also very weak, so in the sample impurity component it is smaller when
It waits, the sensitivity of detection also can be limited greatly.
Utility model content
The purpose of this utility model is to provide a kind of water quality detecting device and detection methods, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, the utility model provides the following technical solutions：
A kind of water quality detecting device, including first light source device, second light source device and detection device, the first light source
Device is in parallel with light path where second light source device and is connect by photosynthetic bundle device progress light path, the photosynthetic bundle device rear
Light path is equipped with light beam splitting arrangement, and the photosynthetic bundle device, light beam splitting arrangement and detection device are sequentially arranged along light path.
As further program of the utility model：There is exciting light successively along light path in the first light source device
Source, optic modulating device, the first light-dividing device and the first condenser lens, another light path is equipped with the on rear side of first light-dividing device
One power detection device.
As further program of the utility model：The excitation light source is laser light source, preferably pump light.
As further program of the utility model：Be equipped with successively along light path in the second light source device probe source and
Second condenser lens.
As further program of the utility model：Be equipped with successively along light path in the detection device tertiary focusing lens,
Filtering apparatus, the second light-dividing device, spatial filter and photodetector are set in another light path on rear side of second light-dividing device
There is the second power to visit device.
As further program of the utility model：Another light path is filled equipped with light absorption on rear side of the smooth beam splitting arrangement
It sets.
Compared with prior art, the utility model has the beneficial effects that：The utility model measures water using photo-thermal effect
The absorption spectrum of sample, sample generates characteristic variations in the case where pumping photoinduction, for no other reason than that sample draws the absorption of pump energy
It rises, therefore, measured signal only reflects that the absorption characteristic of sample, the scattering of sample surfaces and inside do not produce measurement result
It is raw to influence.It is compared with other spectroscopic analysis methods, eliminates influence of the scattering to measurement result, thus measurement result is more reliable,
And detection sensitivity is high.
Description of the drawings
Fig. 1 is the structure and schematic diagram of the utility model.
In figure：1- first light sources device, 11- excitation light sources, 12- optic modulating devices, the first power detections of 13- device, 14-
First light-dividing device, the first condenser lenses of 15-, 2- second light sources device, 21- probe sources, the second condenser lenses of 22-, 3- inspections
It is empty to survey device, 31- tertiary focusings lens, 32- filtering apparatus, the second light-dividing devices of 33-, the second power detections of 34- device, 35-
Between filter, 36- photodetectors, the photosynthetic bundle devices of 4-, 5- sample cells, 6- light beam splitting arrangement, 7- absorption means.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Referring to Fig. 1, in the utility model embodiment, a kind of water quality detecting device and method, including first light source device
1, second light source device 2 and detection device 3, first light source device 1 is interior to be equipped with excitation light source 11, optic modulating device successively along light path
12, the first light-dividing device 14 and the first condenser lens 15,14 another light path of rear side of the first light-dividing device are visited equipped with the first power
Device 13 is surveyed, 11 preferred pump light of excitation light source, second light source device 2 is interior to be gathered equipped with probe source 21 and second successively along light path
Focus lens 22, first light source device 1 is in parallel with 2 place light path of second light source device and carries out light path company by photosynthetic bundle device 4
It connects, which is equipped with light supply apparatus, photosynthetic bundle device 4, sample cell 5, light beam splitting arrangement 6 and detection device 3, detection device successively
It is equipped with tertiary focusing lens 31, filtering apparatus 32, the second light-dividing device 33, spatial filter 35 and photoelectricity successively along light path in 3
Detector 36,33 another light path of rear side of the second light-dividing device are equipped with the second power and visit device 34.
The utility model structure novel, it is stable, when the utility model is used, when excitation in first light source device 1
When light source 21 selects pump light, i.e., when excitation light source is pump light, solution to be measured is put into sample cell 5 and puts sample cell 5
It sets in the light path between photosynthetic bundle device 4 and light beam splitting arrangement 6, then starts first light source device 1 and second light source device
2, the excitation light source 21 in first light source device 1 sends out pump light, and carries out light intensity tune to pump light by optic modulating device 12
System, modulated pump light light beam enter the first work(by being divided into two light beams, one of light beam after the first light-dividing device 14
In rate detector 13, and then power monitoring can be carried out to pump light, another light beam is focused by the first condenser lens 15
Enter combiner device 4 afterwards, is then entered in solution to be measured by photosynthetic bundle device 4, for exciting the photo-thermal of solution to be measured to imitate
It answers, the pump light after solution to be measured prevents light pollution, together by being absorbed by absorption means 7 after light beam splitting arrangement 6
When 2 probe source 21 of second light source device send out detection light and enter combiner device 4 after being focused by the second condenser lens 22,
In addition 21 light intensity of probe source is relatively weak with excitation light source 11, when probe source enters solution to be measured by photosynthetic bundle device 4
When, since solution to be measured leads to local heating after pump light irradiates due to absorbing light energy at this time, and then cause at this
The variation that the characteristic of solution occurs, that is, produce photo-thermal effect, when detecting light and passing through the solution region that photo-thermal effect occurs,
The variation that propagation characteristic can occur will produce newly-increased meeting party effect weakening, and then changed detection light passes through to be measured
Solution is simultaneously entered by light beam splitting arrangement 6 in detection device 3, is passed through first when detection light enters to be equipped in detection device 3
Tertiary focusing lens 31 into focusing, light beam after focusing by filtering apparatus 32 to light beam in veiling glare in addition to detecting light
It is filtered, filtered detection light is divided into two beams after the second light-dividing device 33, wherein a branch of detection light enters the second work(
For rate detection device 34 to carry out power monitoring, another beam detection light enters photodetection after being filtered by spatial filter 35
In device 36, then by phase lock-in detecting technology to the output signal of photodetector 36 into detection, then can be obtained and wait for test sample
The light absorption information of product, the reinspection of laying equal stress on of the wavelength by changing pump light are surveyed, you can obtain the absorption spectrum of sample, then by sample
Absorption spectrum and standard spectrum carry out the water quality situation that comparison can be obtained testing sample solution, in addition in the light path in attached drawing
Each setting position relationship can change its relative tertiary location according to the change in optic path direction in actual use, but
Front and back position relationship on paths direction is immutable.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing in the equivalent requirements of the claims will be fallen
All changes in justice and range are embraced therein.Any reference numeral in claim should not be considered as limitation
Involved claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (6)
1. a kind of water quality detecting device, including first light source device (1), second light source device (2) and detection device (3), special
Sign is, the first light source device (1) it is in parallel with light path where second light source device (2) and by photosynthetic bundle device (4) into
Row light path connects, and photosynthetic bundle device (4) the rear light path is equipped with light beam splitting arrangement (6), the photosynthetic bundle device (4), light
Beam splitting arrangement (6) and detection device (3) are sequentially arranged along light path.
2. a kind of water quality detecting device according to claim 1, which is characterized in that the interior edge of the first light source device (1)
Light path is equipped with excitation light source (11), optic modulating device (12), the first light-dividing device (14) and the first condenser lens (15), institute successively
It states another light path on rear side of the first light-dividing device (14) and is equipped with the first power detection device (13).
3. a kind of water quality detecting device according to claim 2, which is characterized in that the excitation light source (11) is laser light
Source, the laser light source are pump light.
4. a kind of water quality detecting device according to claim 1, which is characterized in that the interior edge of the second light source device (2)
Light path is equipped with probe source (21) and the second condenser lens (22) successively.
5. a kind of water quality detecting device according to claim 1, which is characterized in that along light path in the detection device (3)
Tertiary focusing lens (31), filtering apparatus (32), the second light-dividing device (33), spatial filter (35) and photoelectricity is equipped with successively to visit
Device (36) is surveyed, another light path is equipped with the second power spy device (34) on rear side of second light-dividing device (33).
6. a kind of water quality detecting device according to claim 1, which is characterized in that another on rear side of the smooth beam splitting arrangement (6)
One light path is equipped with absorption means (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721632946.5U CN207894818U (en) | 2017-11-29 | 2017-11-29 | A kind of water quality detecting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721632946.5U CN207894818U (en) | 2017-11-29 | 2017-11-29 | A kind of water quality detecting device |
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| CN207894818U true CN207894818U (en) | 2018-09-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152224A (en) * | 2017-11-29 | 2018-06-12 | 合肥利弗莫尔仪器科技有限公司 | A kind of water quality detecting device and detection method |
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2017
- 2017-11-29 CN CN201721632946.5U patent/CN207894818U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152224A (en) * | 2017-11-29 | 2018-06-12 | 合肥利弗莫尔仪器科技有限公司 | A kind of water quality detecting device and detection method |
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