CN215066128U - Drinking water quality detection device - Google Patents
Drinking water quality detection device Download PDFInfo
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- CN215066128U CN215066128U CN202121415027.9U CN202121415027U CN215066128U CN 215066128 U CN215066128 U CN 215066128U CN 202121415027 U CN202121415027 U CN 202121415027U CN 215066128 U CN215066128 U CN 215066128U
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Abstract
A drinking water quality detection device comprises a first incident light source, a second incident light source, a light detector and an optical pool, wherein the first incident light source provides first incident light which is easy to be absorbed by COD/TOC and second incident light which is not easy to be absorbed by the COD/TOC, and the second incident light source provides third incident light which is not easy to be absorbed by the COD/TOC. The first incident light source, the optical cell and the optical detector are on the same straight line A, and the second incident light source is not on the straight line A; the connecting line of the second incident light source and the optical cell forms an acute angle or a right angle with the connecting line of the first incident light source and the optical cell. When water bodies with different water qualities flow through the optical tank, different spectral characteristic curves are formed, and rapid detection of COD, TOC and water turbidity is realized by combining a mathematical algorithm and parameter calibration. The detection device has high precision and low cost, and can be widely applied to the water quality detection of household drinking water.
Description
Technical Field
The utility model relates to a water quality testing field, in particular to drinking water quality testing device.
Background
The drinking water health becomes the key point of more and more family concerns, a new 'sanitary standard for drinking water' GB 5749-. The oxygen consumption is also called chemical oxygen demand (manganese method), and is expressed by CODmn, potassium permanganate is used as an oxidizing agent, reducing substances in water are oxidized under certain conditions, and the amount of the consumed potassium permanganate is converted into oxygen (O2, mg/L). The reducing substances in the water comprise inorganic substances and organic substances, and are mainly organic substances, so that the oxygen consumption can indirectly reflect the degree of organic pollution of the water, and the comprehensive index for evaluating the total amount of organic pollution of the water body is provided. Total Organic Carbon (TOC), refers to the carbon content of soluble and suspended organic carbon present in water.
The conventional industrial reagent method water quality analysis technology and water quality detector can not be used for the water quality detection of drinking water for civil use, particularly for household life, because chemical reagent consumption is involved and chemical waste liquid is generated; on the other hand, in the industrial ultraviolet UV instrument, the single-wavelength detection generally uses a low-pressure mercury lamp as a light source to provide 254nm light, and the multi-wavelength detection generally uses deuterium lamps, xenon lamps, tungsten lamps and the like to provide light sources, so that the detection equipment has large volume and high cost, and is not suitable for being widely used in the detection of household drinking water.
On the other hand, turbidity is also one of indexes reflecting physical properties of drinking water, the turbidity of the water body is caused by optical scattering or absorption due to suspended matters or colloidal matters or both, and the conventional detection method is to compare the intensity of scattered light of a formalin standard suspension with the intensity of scattered light of a water sample to be detected. The greater the intensity of the scattered light, the higher the turbidity.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the utility model provides a drinking water quality testing device adopts two incident light sources, and first incident light source and optical pool, light detector provide the direct light source on same straight line, and the second incident light source provides the scattered light source, and two incident light sources combine, have improved water quality testing's precision, and the simple structure of this scheme is fit for civilian popularization.
The utility model adopts the technical scheme as follows:
a drinking water quality detection device comprises a first incident light source and a second incident light source which provide incident light with specific wavelengths, a light detector which receives light signals and converts the light signals into electric signals, and an optical pool which provides optical reaction of a detected water sample, wherein the first incident light source provides first incident light which is easy to be absorbed by COD/TOC and second incident light which is not easy to be absorbed by COD/TOC, and the second incident light source provides third incident light which is not easy to be absorbed by COD/TOC;
the first incident light source, the optical cell and the optical detector are on the same straight line A, and the second incident light source is not on the straight line A; the connecting line of the second incident light source and the optical cell forms an acute angle or a right angle with the connecting line of the first incident light source and the optical cell.
In order to better implement the scheme, further, the wavelengths of the second incident light and the third incident light are the same.
In order to better implement the scheme, the system further comprises an optical detection circuit which receives the electric signal, processes the electric signal and outputs the processed electric signal, and the optical detection circuit is connected with the optical detector.
In order to better implement the scheme, further, an included angle between a connecting line of the second incident light source and the optical cell and a connecting line of the first incident light source and the optical cell is a right angle.
In order to better realize the scheme, the wavelength range of the first incident light is 254-285 nm.
In order to better implement the scheme, further, the wavelength of the first incident light is 275 nm.
In order to better implement the scheme, the wavelength ranges of the second incident light and the third incident light are 365-440 nm.
In order to better implement the scheme, further, the wavelengths of the second incident light and the third incident light are both 395 nm.
To better implement the solution, further, the light detectors share a set of receiver and receiving circuit.
In order to better implement the present solution, further, all incident light sources use LED light sources.
The scheme adopts a light source below 440nm as the third incident light for scattering, the scattered light in the range can absorb COD/TOC, another group of second incident light directly emitted by the first incident light source is required to be combined, two spectral curves related to turbidity and COD/TOC concentration can be obtained, the response characteristics of the water body to different spectra are analyzed, and the water turbidity can be obtained by combining a mathematical algorithm and scientific calibration.
Generally, we can ensure that the wavelengths of the second incident light and the third incident light are similar, and optimally, we can make the wavelengths of the second incident light and the third incident light the same.
Meanwhile, through the combination of the first incident light with the wavelength of 275nm and turbidity compensation, more accurate COD/TOC concentration can be calculated. In addition, the adopted light sources are within 220 nm-440 nm, so that a group of receivers and receiving circuits can be shared, and the cost of the device is reduced. The optical detector adopts a broad-spectrum optical receiver, the receiving wavelength is 220 nm-440 nm, and all light sources share the same group of optical receivers, so that an amplifying circuit and a signal processing circuit at the rear end are shared, and the quantity and the cost of electronic devices are saved.
Compared with the traditional industrial scheme, the reagent method of the traditional industrial scheme generates chemical waste liquid, and cannot be used for detecting the quality of the drinking water for family life; the traditional industrial scheme optical method adopts a 254nm wavelength light source to measure COD/TOC concentration, adopts a 550nm wavelength light source to measure water turbidity and is used for compensating and calculating the COD/TOC concentration, widens the wavelength ranges of a measurement light source and a reference light source, and obtains better detection precision, but has the defect of higher cost. This scheme has adopted two sets of crisscross 395nm light sources, through reasonable structural layout and scientific calculation, has compensatied 395nm light source and has had absorptive defect to COD/TOC, has guaranteed the data accuracy, simultaneously because this scheme has shared receiver and receiving circuit, all light sources adopt the LED light source, small, with low costs.
Compared with the traditional civil scheme, the traditional civil scheme adopts a single set of 265nm or 275nm light source to measure the COD/TOC concentration, has the advantages of reducing the cost, but the turbidity of the water quality seriously influences the measurement precision; some schemes also adopt a 395nm light source as turbidity measurement and compensation, but a single set of 395nm light source can be influenced by COD/TOC concentration when measuring turbidity, so that the precision is not high. The third group of light source is added, the problem that when a single group of 395nm light source is used for measuring turbidity, the turbidity is influenced by COD/TOC concentration is solved, the precision advantage of the traditional industrial scheme is achieved, the cost is controlled, and the device can be applied to civil popularization.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. a drinking water quality testing device, compare with traditional industry scheme reagent method, this scheme adopts the optics method, no chemical reagent consumes, the reaction is quick, more is fit for on-line monitoring.
2. A drinking water quality testing device, compare with traditional industrial scheme optical method, this scheme adopts the LED light source, small, the energy consumption is low, longe-lived, and has better cost advantage, is fit for civilian popularization.
3. A drinking water quality testing device, compare with traditional civilian scheme, this scheme has adopted two sets of crisscross 395nm light sources, through reasonable structural configuration and scientific calculation, has solved the not high problem of traditional civilian scheme precision.
Drawings
In order to more clearly illustrate the technical solution, the drawings needed to be used in the embodiments are briefly described below, and it should be understood that, for those skilled in the art, other related drawings can be obtained according to the drawings without creative efforts, wherein:
fig. 1 is a schematic view of the present invention;
fig. 2 is a schematic diagram of the optical detection circuit of the present invention;
fig. 3 is a schematic structural view of the present invention;
in the figure, 1-the first incident light source, 2-the second incident light source, 3-the photodetector, 4-the optical cell.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments, and therefore should not be considered as limitations to the scope of protection. Based on the embodiments in the present invention, all other embodiments obtained by the staff of ordinary skill in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in detail with reference to fig. 1 to 3.
Example 1:
a drinking water quality detection device, as shown in figure 1, comprises a first incident light source and a second incident light source which provide incident light with specific wavelength, a light detector which receives light signals and converts the light signals into electric signals, and an optical cell which provides optical reaction of a detected water sample, wherein the first incident light source provides first incident light which is easy to be absorbed by COD/TOC and second incident light which is not easy to be absorbed by COD/TOC, and the second incident light source provides third incident light which is not easy to be absorbed by COD/TOC.
The first incident light source, the optical cell and the optical detector are on the same straight line A, and the second incident light source is not on the straight line A; the connecting line of the second incident light source and the optical cell forms an acute angle or a right angle with the connecting line of the first incident light source and the optical cell.
The working principle is as follows: the scheme adopts a light source which is not easy to be absorbed by COD/TOC as the scattered third incident light, the scattered light in the range can absorb the COD/TOC, but two spectral curves related to turbidity and COD/TOC concentration can be obtained by combining the second incident light directly emitted by the other group of first incident light sources, and the water quality turbidity can be obtained by analyzing the response characteristics of the water body to different spectra and combining mathematical algorithm and scientific calibration. Meanwhile, through the combination of the first incident light and turbidity compensation, more accurate COD/TOC concentration can be calculated.
Example 2:
on the basis of embodiment 1, the scheme further comprises an optical detection circuit for receiving the electric signal, processing and outputting the electric signal, wherein the optical detection circuit is connected with the optical detector. The light detection circuit is generally structured as shown in fig. 2.
The wavelengths of the second incident light and the third incident light are the same.
And the included angle between the connecting line of the second incident light source and the optical cell and the connecting line of the first incident light source and the optical cell is a right angle.
The wavelength range of the first incident light is 254-285 nm. Preferably, the wavelength of the first incident light is 275 nm.
The wavelength range of the second incident light and the third incident light is 365-440 nm. Preferably, the wavelengths of the second incident light and the third incident light are both 395 nm.
The photodetectors share a set of receivers and receiving circuitry. All incident light sources use LED light sources.
The working principle is as follows: the scheme adopts a light source below 440nm as scattered third incident light, although scattered light in the range can absorb COD/TOC, a binary equation related to turbidity and COD/TOC concentration can be obtained through the second incident light directly emitted by the other group of first incident light sources, the equation can be solved to avoid the influence of COD/TOC on turbidity, and the turbidity calculation precision is improved. Meanwhile, through the combination of the first incident light with the wavelength of 275nm and turbidity compensation, more accurate COD/TOC concentration can be calculated. In addition, the adopted light sources are all within 220 nm-440 nm, so that the light detectors can be shared, and the cost is reduced. The optical detector adopts a broad-spectrum optical receiver, the receiving wavelength is 220 nm-440 nm, and all light sources share the same group of optical receivers, so that an amplifying circuit and a signal processing circuit at the rear end are shared, and the quantity and the cost of electronic devices are saved.
The embodiment also provides a specific mechanical structure of the water turbidity measuring device based on the scheme, as shown in fig. 3, in the shell of the measuring device, the optical cell is arranged at the central position, the first incident light source and the optical detector are arranged based on the bilateral symmetry of the optical cell, the second incident light source is arranged at the upper end of the optical cell, and the optical detection circuit is arranged at the lower end of the optical cell.
Other parts of this embodiment are the same as those of embodiment 1, and thus are not described again.
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.
Claims (10)
1. The utility model provides a drinking water quality testing device, includes the first incident light source and the second incident light source that provide specific wavelength incident light, receives optical signal and converts the optical detector of signal of telecommunication into, provides the optical pool of being surveyed water appearance optical reaction, its characterized in that: the first incident light source provides first incident light which is easy to be absorbed by COD/TOC and second incident light which is not easy to be absorbed by the COD/TOC, and the second incident light source provides third incident light which is not easy to be absorbed by the COD/TOC;
the first incident light source, the optical cell and the optical detector are on the same straight line A, and the second incident light source is not on the straight line A; the connecting line of the second incident light source and the optical cell forms an acute angle or a right angle with the connecting line of the first incident light source and the optical cell.
2. The drinking water quality detection device according to claim 1, characterized in that: the wavelengths of the second incident light and the third incident light are the same.
3. The drinking water quality detection device according to claim 1, characterized in that: the optical detection circuit is used for receiving the electric signal, processing the electric signal and outputting the processed electric signal, and is connected with the optical detector.
4. The drinking water quality detection device according to claim 1, characterized in that: and the included angle between the connecting line of the second incident light source and the optical cell and the connecting line of the first incident light source and the optical cell is a right angle.
5. The drinking water quality detection device according to claim 1, characterized in that: the wavelength range of the first incident light is 254-285 nm.
6. The drinking water quality detection device according to claim 5, characterized in that: the wavelength of the first incident light is 275 nm.
7. The drinking water quality detection device according to claim 1, characterized in that: the wavelength range of the second incident light and the third incident light is 365-440 nm.
8. The drinking water quality detection device according to claim 7, characterized in that: the wavelengths of the second incident light and the third incident light are both 395 nm.
9. The drinking water quality detection device according to claim 1, characterized in that: the photodetectors share a set of receivers and receiving circuitry.
10. The drinking water quality detection device according to claim 1, characterized in that: all incident light sources use LED light sources.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121415027.9U CN215066128U (en) | 2021-06-24 | 2021-06-24 | Drinking water quality detection device |
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| CN202121415027.9U CN215066128U (en) | 2021-06-24 | 2021-06-24 | Drinking water quality detection device |
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| CN215066128U true CN215066128U (en) | 2021-12-07 |
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| CN202121415027.9U Active CN215066128U (en) | 2021-06-24 | 2021-06-24 | Drinking water quality detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034654A (en) * | 2021-12-10 | 2022-02-11 | 西湖大学 | AI deep learning-based water quality TOC and COD online detection and cross-validation method |
| CN117074345A (en) * | 2023-10-16 | 2023-11-17 | 山东风途物联网科技有限公司 | Detection and calibration method for optical equipment for water quality detection |
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2021
- 2021-06-24 CN CN202121415027.9U patent/CN215066128U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114034654A (en) * | 2021-12-10 | 2022-02-11 | 西湖大学 | AI deep learning-based water quality TOC and COD online detection and cross-validation method |
| CN117074345A (en) * | 2023-10-16 | 2023-11-17 | 山东风途物联网科技有限公司 | Detection and calibration method for optical equipment for water quality detection |
| CN117074345B (en) * | 2023-10-16 | 2024-01-16 | 山东风途物联网科技有限公司 | Detection and calibration method for optical equipment for water quality detection |
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