CN204142626U - A kind of water quality on-site sampling detection probe of taper photoelectric coupling - Google Patents
A kind of water quality on-site sampling detection probe of taper photoelectric coupling Download PDFInfo
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- CN204142626U CN204142626U CN201420453498.2U CN201420453498U CN204142626U CN 204142626 U CN204142626 U CN 204142626U CN 201420453498 U CN201420453498 U CN 201420453498U CN 204142626 U CN204142626 U CN 204142626U
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Abstract
The utility model belongs to field of water quality detection, is specifically related to a kind of water quality on-site sampling detection probe of taper photoelectric coupling.Probe shape is conical or square taper, and namely probe diameter is with probe length linear change, and the sealing-plug of heavy caliber end is integrated with LED light source, concave mirror and collimation lens, and small-caliber end and corresponding size photodetector seal fits.Utilize the water quality on-site sampling detection probe of taper photoelectric coupling of the present utility model, can make all to converge to small-caliber end by the light signal of water quality to be measured to export, thus received completely by the photodetector of small-caliber end, not only increase the Photoelectric Detection efficiency of water quality Photoelectric Detection, water sample on-site sampling can be realized detect simultaneously, shorten sense cycle.
Description
Technical field
The invention belongs to field of water quality detection, be specifically related to a kind of water quality on-site sampling detection probe of taper photoelectric coupling.
Background technology
The fast development of society, the demand of the mankind to water resource is constantly increased, and the water pollution problems thereupon brought is also more and more serious.Traditional water quality detection mainly utilizes electrochemical method or laboratory chemical reagent reacting to detect water-quality constituents, these methods not only can waste a large amount of human and material resources, also easily cause secondary pollution, on-the-spot real-time water conditions information can not be obtained, be unfavorable for monitoring and the improvement of water environment.It is low then to there is signal utilization factor in other photoelectricity class water quality detector, and photodetector can not receiving optical signals and the large shortcoming of photodetector size completely, is unfavorable for accurately measuring and cost-saving.
Therefore, in order to avoid the problems referred to above, the present invention devises a kind of water quality on-site sampling detection probe of taper photoelectric coupling, this probe makes the light signal with measured matter information can completely by photoelectric detector, this sampling probe is easy to portability and microminiaturization simultaneously, detection system signal to noise ratio (S/N ratio) after integrated is high, is beneficial to and carries out sampling of water quality detection at environment measuring scene.
Summary of the invention
The object of the invention is to solve traditional water quality detection can not the problems such as on-site sampling detects, sense cycle is long, secondary pollution is serious, solve the problem that other photoelectricity water quality detector Photoelectric Detection efficiency is not high simultaneously.Therefore, the present invention is by the water quality on-site sampling detection probe of a kind of taper photoelectric coupling of design, this conical probe can make light signal with measured matter information completely by photoelectric detector, the Photoelectric Detection efficiency of effective raising Photoelectric Detection, on-the-spot real time sample can be realized detect simultaneously, both economy, saving, environmental protection, can be integrated in portable system again, be easy to carry, and clean and change.
For achieving the above object, the present invention adopts following technical scheme:
Taper sampling probe of the present invention comprises shell, the conical hollow groove storing testing liquid, the thin sealant of small-caliber end, the sealing-plug of heavy caliber end and photodetector, probe global shape is conical or square taper, and namely probe diameter is with probe length linear change.Meet total reflection condition when transmitting in sampling probe to make light signal, probe is mainly formed by low-refraction optical polymer material.
Conical probe heavy caliber end sealing-plug can take off from heavy caliber end, is convenient to water quality on-site sampling; Meanwhile, this structure is beneficial to observes probe internal contamination situation from heavy caliber end, can carry out in time cleaning or changing.
Sealing-plug end is integrated with LED light source, concave mirror and collimation lens.As probe source, this LED luminescence spectrum feature will match with measured matter spectral line characteristic, LED light source is positioned at collimation lens and the concave reflection mirror foci place of sealing-plug, collimation lens can ensure that the light that light source sends irradiates conical probe with directional light, thus make a part of directional light directly through water quality in cone tank by photoelectric detector, another part light after conical inboard wall multiple total reflection by photoelectric detector; Concave mirror can make the diverging light of light source become parallel beam, incident at a certain angle after collimation lens focuses on, and equally by photoelectric detector after the multiple total reflection of inwall, thus effectively improves light source utilization rate and Photoelectric Detection efficiency.
The small-caliber end glimmer plastic seal of conical probe, this optical plastic has large refractive index and high transmission rate, large refractive index can ensure that light can not be totally reflected at small-caliber end place, and high transmission rate can reduce light signal in small-caliber end energy loss, is beneficial to the detection of light signal.
The thin sealant of photodetector and small-caliber end seals fits, therefore, when meeting Signal transmissions condition, light signal with measured matter information all receives by photodetector, this structure not only can improve optical signal detecting efficiency, can realize the on-the-spot real time sample of water quality to detect, measurement result is more accurate simultaneously.
accompanying drawing explanation
Fig. 1 is meridian ray plot in the water quality on-site sampling detection probe of a kind of taper photoelectric coupling in patent of the present invention.
Fig. 2 is the taper shape of the water quality on-site sampling detection probe of a kind of taper photoelectric coupling in patent of the present invention and square taper vertical view.
Fig. 3 is the partial enlarged drawing that the water quality on-site sampling detection probe heavy caliber end band of a kind of taper photoelectric coupling in patent of the present invention has sealing-plug.
Fig. 4 is the water quality on-site sampling detection probe water quality detection system figure of a kind of taper photoelectric coupling in patent of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
A kind of water quality on-site sampling detection probe total system of taper photoelectric coupling as shown in Figure 4, the shell (1) that conical probe is made up of low-refraction optical polymer material, the storage conical hollow groove (2) of testing liquid and the thin sealant (3) of small-caliber end form, and sealant (3) and correspondingly-sized photodetector (8) are fitted completely.The heavy caliber end of conical probe and sealing-plug (4) combine, sealing plug (4) can take off from heavy caliber end, and sealing-plug end is with collimation lens (5), LED light source (6) and concave mirror (7), collimation lens (5) can ensure that the light that light source sends irradiates conical probe with directional light, thus make a part of directional light directly by water quality in cone tank by photoelectric detector, another part light after conical inboard wall multiple total reflection by photoelectric detector; The luminescence spectrum feature of LED light source (6) will match with measured matter spectral line characteristic; Concave mirror (7) can make the diverging light of light source become parallel beam, it is incident at a certain angle after collimation lens focuses on, equally by photoelectric detector after the multiple total reflection of inwall, thus effectively improve light source utilization rate and Photoelectric Detection efficiency.
In order to ensure to be totally reflected in taper sampling probe inside, also should meet certain condition when designing probe, accompanying drawing 1 is meridian ray plot in the water quality on-site sampling detection probe of this taper photoelectric coupling.If δ is the cone angle of taper sampling probe, from accompanying drawing 1, in taper sampling probe, light reflection angle Φ on shell (1) interphase increases with order of reflection and reduces gradually, can be obtained by geometric relationship in figure and refraction law:
Φ
m＝90°-arcsin(1/n
1·sinΨ)-(2m-1)·(δ/2) (1)
In formula, m is order of reflection, n
1for the refractive index of water quality to be measured, record by index meter, ψ is angle of incidence of light.Above formula illustrates, when light is from holding incidence greatly, in order to ensure that every secondary reflection all meets total reflection condition and light from small end outgoing, also should be able to meet:
In formula, a
1and a
2taper sampling probe small-caliber end and heavy caliber end radius respectively, n
0for transparent outer cover refractive index, and there is n
0< n
1, Θ is refraction angle.When cone angle δ is very little, there is cos (δ/2) ≈ 1, then have above formula to obtain:
Above formula is light in conical probe, transmits the condition gathering small end.Recycling:
In formula, L is the length of taper sampling probe, as shown in Figure 1, can obtain:
Above formula illustrates, for making the light collection in taper sampling probe, the Design of length of probe there are certain requirements.Above-mentioned formula, for actual production provides theoretical foundation, meanwhile, can control the maximum incident angle of converging beam by the relative aperture of Rational choice lens, ensure that converging beam also meets total reflection condition.
After probe completes by above-mentioned requirements design production, LED light source (6) is connected with light source control module (9), photodetector (8) is connected with signal transacting center (10) by circuit, water sample to be measured is injected groove (2), tighten sealing-plug (4), open system, the light of light source is after collimation lens (5) and concave mirror (7), part directional light directly by water quality to be measured in cone tank by photoelectric detector, another part light after conical inboard wall multiple total reflection by photoelectric detector, the light signal received draws measured parameter through processing enter (10) analysis.
The water quality detection probe of this taper photoelectric coupling can realize water sample on-site sampling and detect, and adopts pyramidal structure to make light signal can be detected device completely simultaneously and receives, improve the Photoelectric Detection efficiency of water quality Photoelectric Detection.
Claims (3)
1. the water quality on-site sampling detection probe of a taper photoelectric coupling, its feature is: this probe comprises shell (1), the conical hollow groove (2) storing testing liquid, the thin sealant (3) of small-caliber end, the sealing-plug (4) of heavy caliber end and photodetector (8), and probe global shape is conical or square taper.
2. the water quality on-site sampling detection probe of a kind of taper photoelectric coupling according to claim 1, its feature is: sealing-plug (4) end is integrated with LED light source (6), concave mirror (7) and collimation lens (5).
3. the water quality on-site sampling detection probe of a kind of taper photoelectric coupling according to claim 1, its feature is: photodetector (8) seals with the thin sealant (3) of small-caliber end and fits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420453498.2U CN204142626U (en) | 2014-08-08 | 2014-08-08 | A kind of water quality on-site sampling detection probe of taper photoelectric coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420453498.2U CN204142626U (en) | 2014-08-08 | 2014-08-08 | A kind of water quality on-site sampling detection probe of taper photoelectric coupling |
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| Publication Number | Publication Date |
|---|---|
| CN204142626U true CN204142626U (en) | 2015-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420453498.2U Expired - Fee Related CN204142626U (en) | 2014-08-08 | 2014-08-08 | A kind of water quality on-site sampling detection probe of taper photoelectric coupling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108389501A (en) * | 2018-03-21 | 2018-08-10 | 杜明刚 | A kind of morning and evening convenient for teaching demonstration encloses the land globe |
-
2014
- 2014-08-08 CN CN201420453498.2U patent/CN204142626U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108389501A (en) * | 2018-03-21 | 2018-08-10 | 杜明刚 | A kind of morning and evening convenient for teaching demonstration encloses the land globe |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20150808 |
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| EXPY | Termination of patent right or utility model |