CN103792199A - Water quality monitoring device based on colorimetric method - Google Patents
Water quality monitoring device based on colorimetric method Download PDFInfo
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- CN103792199A CN103792199A CN201410055955.7A CN201410055955A CN103792199A CN 103792199 A CN103792199 A CN 103792199A CN 201410055955 A CN201410055955 A CN 201410055955A CN 103792199 A CN103792199 A CN 103792199A
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Abstract
The invention discloses a water quality monitoring device based on a colorimetric method, wherein the device comprises a light transmitter, a first convex lens, a cuvette with a spherical protuberance, a second convex lens and an optical receiver. The incident light transmitted by the light transmitter is focused after being refracted by the first convex lens and a focus point is positioned at the sphere center of the cuvette spherical protuberance, so that the incident light can verticality irradiate a water sample to be detected and the optical path of the incident light in the water sample to be detected is equal, thus the incident light meets the Lambert-Beer law and the detection precision of water quality can be improved.
Description
Technical field
The present invention relates to environmental monitoring field, relate in particular a kind of water quality detecting device based on colourimetry.
Background technology
Along with the aggravation of environmental pollution, the water resource that people depend on for existence has also been subject to pollution to a great extent, so that comprise a large amount of objectionable impuritiess in people's domestic water and water of productive use, and such as trivalent chromic ion.In order to ensure the security of people's water, conventionally use at present the parallel rays of specific wavelength to irradiate water sample to be measured, in water sample, test substance can absorb the light ray energy of this wavelength, and then obtains test substance concentration in water sample by langbobier law.
It should be noted that, langbobier law requires incident light vertical incidence water sample to be measured.But, in actual application process, be right cylinder owing to holding the cuvette of water sample to be measured, thereby parallel incident light does not meet the requirement of vertical incidence water sample to be measured, cause incident light to occur refraction, and the light path L difference (showing the index path of existing water quality detecting device referring to Fig. 1) of the incident light of diverse location, thereby cause accuracy of detection lower.
Summary of the invention
In view of this, the invention provides a kind of water quality detecting device based on colourimetry, with the precision of increasing water quality and detecting.
For achieving the above object, the invention provides following technical scheme:
Based on a water quality detecting device for colourimetry, comprising: optical transmitting set, the first convex lens and there is cuvette and the optical receiver of spherical protuberances
Wherein, described optical transmitting set, for the incident light to described the first convex lens transmitting specific wavelength;
Described the first convex lens, for the incident light of described optical transmitting set transmitting is focused on, wherein, the focus point of described incident light is positioned at the centre of sphere of the spherical protuberances of described cuvette;
Described optical receiver, for exporting corresponding electric signal according to the light intensity of the emergent light through described cuvette.
Preferably, described device also comprises and being arranged between described cuvette and described optical receiver, will converge to through the emergent light of described cuvette the second convex lens of described optical receiver.
Preferably, described the first convex lens and/or described the second convex lens are plano-convex lens.
Preferably, described optical transmitting set is between one times of focal length and two times of focal lengths of described the first convex lens.
Preferably, described device also comprises: according to the electric signal of described optical receiver output, utilize langbobier law to calculate the processor of measured matter concentration in water sample to be measured.
Preferably, described device also comprises: be connected with described processor, show the display of measured matter concentration in water sample to be measured.
Preferably, described device also comprises: be connected with described processor, and in the time that the concentration of measured matter in water sample to be measured is more than preset value, the alarm of output alarm signal.
Known via above-mentioned technical scheme, compared with prior art, the present invention openly provides a kind of water quality detecting device based on colourimetry.Wherein, this device comprises: optical transmitting set, the first convex lens, the cuvette with spherical protuberances, the second convex lens and optical receiver.The incident light of optical transmitting set transmitting is assembled after the refraction of the first convex lens, and focus point is positioned at the centre of sphere of cuvette spherical protuberances, thereby guarantee incident light vertical irradiation water sample to be measured, and guarantee the equivalent optical path of incident light in water sample to be measured, thereby make incident light meet langbobier law, improved water quality detection precision.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skills, do not paying under the prerequisite of creative work, other accompanying drawing can also be provided according to the accompanying drawing providing.
Fig. 1 shows the index path of existing water quality detecting device;
Fig. 2 shows the structural representation of the cuvette of a kind of water quality detecting device based on colourimetry of the present invention;
Fig. 3 shows the index path of an embodiment of a kind of water quality detecting device based on colourimetry of the present invention;
Fig. 4 shows the index path of another embodiment of a kind of water quality detecting device based on colourimetry of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment (one)
Referring to Fig. 2 and Fig. 3.Wherein, Fig. 2 shows the structural representation of the cuvette of a kind of water quality detecting device based on colourimetry of the present invention.Fig. 3 shows the index path of an embodiment of a kind of water quality detecting device based on colourimetry of the present invention.
As shown in Figure 2, the cuvette of this device has spherical protuberances 1.
As shown in Figure 3, this device comprises: optical transmitting set 21, the first convex lens 22, cuvette 23, optical receiver 24 and processor 25.
Wherein, optical transmitting set 21 is for launching the incident light of specific wavelength to the first convex lens 22.This incident light focuses on after the refraction of the first convex lens, and focus point is positioned at the centre of sphere of the spherical protuberances of this cuvette 23.It should be noted that, for convenient, incident light is regulated, this optical transmitting set 21 is between one times of focal length of object space and two times of focal lengths of the first convex lens 22.
Incident light vertical irradiation water sample to be measured after the first convex lens 22 refractions, has avoided incident light to occur the situation of refraction.Meanwhile, because this incident light all passes through the centre of sphere, thereby incident light is certain through the light path of water sample to be measured, is the diameter of this spherical protuberances.
It should be noted that, at langbobier law I=I
010
-ε cLin, I0 is incident intensity, and I is output intensity, and ε is that absorption coefficient, c are test substance concentration, L light path.
As seen from the above embodiment, in this present invention, the incident light of optical transmitting set transmitting is assembled after the refraction of the first convex lens, and focus point is positioned at the centre of sphere of cuvette spherical protuberances, thereby guarantee incident light vertical irradiation water sample to be measured, avoided the refraction of light.And, guarantee the equivalent optical path of incident light in water sample to be measured, facilitate the processing of processor to data, improve water quality detection precision.
Embodiment (two)
Show the index path of another embodiment of a kind of water quality detecting device based on colourimetry of the present invention referring to Fig. 4.
As shown in Figure 4, in the present embodiment, in order to guarantee all to be received by optical receiver 24 through the emergent light of cuvette 23, between cuvette 23 and optical receiver 24, be also provided with the second convex lens 26.Emergent light, after the refraction of the second convex lens 26, is all absorbed by optical receiver 24.
It should be noted that, at the present embodiment, this device also comprises: be connected with processor 25, and for showing the display 27 of measured matter concentration, and alarm 28.
In the time that processor 25 determines that the concentration of the measured matter in water sample to be measured has been more than preset value, processor 25 is exported corresponding control signal to alarm 28, send alerting signal to control alarm, thereby remind the test substance severe overweight in testing staff's detected water sample.
Optionally, in above-described embodiment () and embodiment (two), the first convex lens and the second convex lens are plano-convex lens.
Finally, also it should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, article or the equipment that comprises described key element and also have other identical element.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the application.To be apparent for those skilled in the art to the multiple modification of these embodiment, General Principle as defined herein can, in the case of not departing from the application's spirit or scope, realize in other embodiments.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. the water quality detecting device based on colourimetry, is characterized in that, comprising: optical transmitting set, the first convex lens and have cuvette and the optical receiver of spherical protuberances
Wherein, described optical transmitting set, for the incident light to described the first convex lens transmitting specific wavelength;
Described the first convex lens, for the incident light of described optical transmitting set transmitting is focused on, wherein, the focus point of described incident light is positioned at the centre of sphere of the spherical protuberances of described cuvette;
Described optical receiver, for exporting corresponding electric signal according to the light intensity of the emergent light through described cuvette.
2. device according to claim 1, is characterized in that, described device also comprises and being arranged between described cuvette and described optical receiver, will converge to through the emergent light of described cuvette the second convex lens of described optical receiver.
3. device according to claim 1 and 2, is characterized in that, described the first convex lens and/or described the second convex lens are plano-convex lens.
4. device according to claim 1, is characterized in that, described optical transmitting set is between one times of focal length and two times of focal lengths of described the first convex lens.
5. device according to claim 1, is characterized in that, described device also comprises: according to the electric signal of described optical receiver output, utilize langbobier law to calculate the processor of measured matter concentration in water sample to be measured.
6. device according to claim 5, is characterized in that, described device also comprises: be connected with described processor, show the display of measured matter concentration in water sample to be measured.
7. device according to claim 5, is characterized in that, described device also comprises: be connected with described processor, and in the time that the concentration of measured matter in water sample to be measured is more than preset value, the alarm of output alarm signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410055955.7A CN103792199B (en) | 2014-02-19 | 2014-02-19 | A kind of water monitoring device based on colorimetric method |
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| CN201410055955.7A CN103792199B (en) | 2014-02-19 | 2014-02-19 | A kind of water monitoring device based on colorimetric method |
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| CN103792199B CN103792199B (en) | 2016-05-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020083A (en) * | 2014-06-13 | 2014-09-03 | 重庆大学 | Method for confirming scattering properties of suspended particle matter in water |
| CN104359841A (en) * | 2014-10-27 | 2015-02-18 | 合肥卓越分析仪器有限责任公司 | Organic solution spectrophotometer |
| CN106323873A (en) * | 2016-10-11 | 2017-01-11 | 桂林电子科技大学 | Transmitting/reflecting-combined fluorescent multiplication cuvette |
| CN108169130A (en) * | 2017-12-28 | 2018-06-15 | 安徽皖仪科技股份有限公司 | A kind of double light path colorimetric devices of dual wavelength for CODcr water quality on-line monitoring instruments |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104020083A (en) * | 2014-06-13 | 2014-09-03 | 重庆大学 | Method for confirming scattering properties of suspended particle matter in water |
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| CN104359841A (en) * | 2014-10-27 | 2015-02-18 | 合肥卓越分析仪器有限责任公司 | Organic solution spectrophotometer |
| CN106323873A (en) * | 2016-10-11 | 2017-01-11 | 桂林电子科技大学 | Transmitting/reflecting-combined fluorescent multiplication cuvette |
| CN108169130A (en) * | 2017-12-28 | 2018-06-15 | 安徽皖仪科技股份有限公司 | A kind of double light path colorimetric devices of dual wavelength for CODcr water quality on-line monitoring instruments |
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| CN103792199B (en) | 2016-05-11 |
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