CN212159557U - Spectrum analysis equipment for nitrogen, phosphorus and potassium element content in crop cultivation medium - Google Patents
Spectrum analysis equipment for nitrogen, phosphorus and potassium element content in crop cultivation medium Download PDFInfo
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Abstract
The utility model discloses a nitrogen phosphorus potassium element content spectrum analysis device in crop cultivation medium, which comprises a laser light source, the laser light source is connected with a multimode laser splitter through a circuit, two light source circuits are arranged on the multimode laser splitter, the two light source circuits are respectively a reference light source circuit and a sample light source circuit, one side of the reference light source circuit and the sample light source circuit is provided with a continuous sample feeding system for continuously conveying reference samples and sample for the reference light source circuit and the sample light source circuit, the utility model can be used for accurately detecting the content of nitrogen element, phosphorus element and potassium element in the crop cultivation medium, in addition, in-situ online analysis can be realized, the use is convenient, the concentration of each nutrient in the crop cultivation medium can be intuitively reflected, the detection data is accurate, and the growth environment of crops can be detected constantly.
Description
Technical Field
The utility model relates to a spectral analysis equipment of nutrient content in crops cultivation matrix, specific theory relates to a nitrogen phosphorus potassium element content spectral analysis equipment in crops cultivation matrix, belongs to the accurate management technical field of agricultural.
Background
Crop nutrient elements (nitrogen, phosphorus, potassium and the like) are closely related to the growth condition and the yield of crops, and the nitrogen, the phosphorus and the potassium are three main nutrient elements of the crops; nitrogen is a protein component, can promote plant photosynthesis and increase crop yield; phosphorus mainly constitutes nucleic acid, phospholipid, adenosine phosphate, phytic acid and the like, and participates in energy metabolism, storage and transmission of genetic information, formation of cell membranes and enzyme activity; potassium can regulate crop osmotic pressure, enhance crop stress resistance and improve quality.
The method has the advantages that the content of nitrogen, phosphorus and potassium elements in the crop culture medium is obtained, the direct relation is provided for the understanding of the growth condition of crops, and the method can be used for realizing early quantitative fertilization according to the content of the nitrogen, phosphorus and potassium elements in the obtained culture medium.
However, at present, the detection methods of crop nutrient elements mainly include a Kjeldahl method, a Dumet's combustion method, a colorimetric method, a flame combustion method and the like. However, the operation of the methods requires that the crop culture medium is collected firstly and then transported to a laboratory, and the detection of the nutrient content in the crop culture medium cannot be realized, so that the operation method is complex and high in cost, a large amount of chemical reagents are consumed, the environmental pollution is caused, and the requirement for rapidly acquiring the nutrient information of the farmland crops cannot be met.
In order to solve the technical problems, in the prior art, a spectrum analyzer is used for detecting and analyzing, the spectrum analyzer utilizes a deuterium lamp to emit a light source, then a light beam with a wavelength meeting the requirement is separated out through a refraction light-splitting principle, then the light beam penetrates through a liquid sample to be analyzed, and then a spectrum emitted by exciting plasma atoms is obtained through the spectrum analyzer, so that the element composition components in the sample are identified, and further the detection and analysis on the concentration of nutrient elements in the liquid sample can be carried out.
However, the existing spectrum analyzer is complex in overall structure, high in manufacturing and using cost, large in wavelength change of light beams and capable of influencing detection data, so that the detection data are inaccurate, the existing spectrum analyzers need to preprocess samples, collected crop cultivation substrates are distilled by adding water to obtain distilled water containing nutrients in the crop cultivation substrates, then the distilled water is detected and analyzed, the detection operation is complex, the detection cost is high, the detection mode can only be carried out in a laboratory, the nutrient content in the crop cultivation substrates cannot be detected and collected and analyzed in situ in the field, and the requirement for rapidly obtaining the crop nutrition information in the farmland cannot be met.
SUMMERY OF THE UTILITY MODEL
The to-be-solved main technical problem of the utility model is to provide a simple structure, convenient to use can carry out nitrogen phosphorus potassium element content spectral analysis equipment in the crops cultivation matrix of online normal position detection, analysis to the nutrient content in the crops cultivation matrix.
In order to solve the technical problem, the utility model provides a following technical scheme:
the spectrum analysis equipment for the nitrogen, phosphorus and potassium element content in the crop cultivation matrix comprises a laser light source, wherein the laser light source is connected with a multimode laser splitter through a line, two light source lines are installed on the multimode laser splitter and are respectively a reference light source line and a sample light source line, and a continuous sample introduction system for continuously conveying reference samples and samples to the reference light source line and the sample light source line is arranged on one side of the reference light source line and the sample light source line.
The following is the utility model discloses to above-mentioned technical scheme's further optimization:
the line between the laser source and the multimode laser splitter is a quartz fiber, laser emitted by the laser source is transmitted to the multimode laser splitter through the quartz fiber, the multimode laser splitter splits the laser into two beams, namely a measurement reference laser beam and a measurement sample laser beam, the measurement reference laser beam is transmitted along the measurement reference light source line, and the measurement sample laser beam is transmitted along the measurement sample light source line.
Further optimization: the reference light source line for measurement comprises a first collimating mirror, reference photoelectric detectors are arranged on one side of the first collimating mirror at intervals, and reference transmission cuvettes are arranged between the first collimating mirror and the reference photoelectric detectors at intervals.
Further optimization: the sample light source measuring circuit comprises a second collimating mirror, sample photoelectric detectors are arranged on one side of the second collimating mirror at intervals, and sample transmission cuvettes are arranged between the second collimating mirror and the sample photoelectric detectors at intervals.
Further optimization: optical fibers are respectively arranged between the multimode laser splitter and the first collimating mirror and between the multimode laser splitter and the second collimating mirror, and the measured reference laser beam and the measured sample laser beam which are split by the multimode laser splitter are respectively transmitted to the corresponding first collimating mirror and the corresponding second collimating mirror through the optical fibers.
Further optimization: the laser light source comprises a nitrogen element detection laser light source, a phosphorus element detection laser light source and a potassium element detection laser light source, and the nitrogen element detection laser light source, the phosphorus element detection laser light source and the potassium element detection laser light source are respectively used for detecting the content of nitrogen element, phosphorus element and potassium element in the crop cultivation substrate.
Further optimization: the wavelengths absorbed by the nitrogen elements are: 210-230nm, the wavelength of the nitrogen element detection laser light source is 220nm, and the wavelength absorbed by the phosphorus element is as follows: 460-490nm, the wavelength of the phosphorus element detection laser light source is 490nm, and the wavelength of potassium element absorption is: 420-450nm, and the wavelength of the laser light source for detecting the potassium element is 440 nm.
Further optimization: the reference transmission cuvette and the sample transmission cuvette are both provided with liquid storage cavities, and liquid inlets and liquid outlets communicated with the liquid storage cavities are arranged above the reference transmission cuvette and the sample transmission cuvette.
Further optimization: the continuous sampling system comprises a first peristaltic pump and a second peristaltic pump, and liquid inlet ends and liquid outlet ends of the first peristaltic pump and the second peristaltic pump are respectively communicated with a liquid inlet pipe and a liquid outlet pipe.
Further optimization: the liquid inlet pipe of the first peristaltic pump is communicated with the crop cultivation medium nutrient in-situ collector, the liquid outlet pipe of the first peristaltic pump is communicated with the liquid inlet of the sample transmission cuvette, the liquid inlet pipe of the second peristaltic pump is communicated with the reference sample pool, and the liquid outlet pipe of the second peristaltic pump is communicated with the liquid inlet of the reference transmission cuvette.
The above technical scheme is adopted in the utility model, think about ingeniously, rational in infrastructure, can be used for nitrogen element in to crops culture medium, phosphorus element, potassium element's content carries out the accuracy and detects, and can realize normal position on-line analysis, facilitate the use, the concentration that can each nutrient in the audio-visual reflection crops culture medium and the detected data are accurate, can guarantee the growing environment who detects crops constantly, and then the person of facilitating the use can carry out accurate watering liquid manure according to the content of individual nutrient in the crops culture medium, can guarantee agricultural product growth environment safety and convenient constantly risk prediction analysis to growing environment, and overall structure job stabilization, and need not laying of other refractors and carry out the beam split, make the overall structure of this equipment simple, and convenient to use.
The present invention will be further explained with reference to the drawings and examples.
Drawings
Fig. 1 is a general schematic diagram of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of a reference transmission cuvette in embodiment 1 of the present invention;
fig. 3 is a schematic connection diagram of a first peristaltic pump in embodiment 1 of the present invention;
fig. 4 is a schematic connection diagram of a second peristaltic pump in embodiment 1 of the present invention;
fig. 5 is a schematic structural diagram of a sample transmission cuvette in embodiment 2 of the present invention.
In the figure: 1-a laser light source; 2-a multimode laser splitter; 3-a first collimating mirror; 31-a second collimating mirror; 4-a reference photodetector; 41-sample photodetector; 5-reference transmission cuvette; 51-sample transmission cuvette; 6-quartz optical fiber; 7-an optical fiber; 8-a signal processing unit; 9-a fertilization platform; 10-a first peristaltic pump; 101-a second peristaltic pump; 11-a liquid inlet pipe; 12-a liquid outlet pipe; 13-a liquid inlet; 14-a liquid outlet; 15-reagent loading port; 16-crop cultivation substrate nutrient in-situ collector; 17-a filter; 18-measurement reference light source circuit; 19-measuring a sample light source circuit; 20-reference cuvette.
Detailed Description
Example 1: as shown in fig. 1-4, nitrogen phosphorus potassium element content spectral analysis equipment in crops cultivation matrix, including laser light source 1, laser light source 1 has multimode laser branching unit 2 through the line connection, install two light source circuits on the multimode laser branching unit 2, two light source circuits are respectively including survey reference light source circuit 18 and survey sample light source circuit 19, survey reference light source circuit 18 and survey sample light source circuit 19's one side is provided with and is used for surveying reference light source circuit 18 and survey sample light source circuit 19, the continuous sampling system of continuous transport reference sample and survey sample.
By the design, the reference sample and the measured sample can be continuously conveyed to the measured reference light source line 18 and the measured sample light source line 19 through the continuous sample feeding system, and the absorbance of the measured sample is detected, analyzed and further the content of nutrients in the measured sample is detected, analyzed and measured.
At this time, the laser light source 1 can emit laser light with a specific wavelength, the laser light is transmitted to the multimode laser splitter 2 through a line, the multimode laser splitter 2 splits the laser light with the specific wavelength emitted by the laser light source 1 into two parts, and the intensity of the split laser light with the specific wavelength is weakened, but the wavelength is unchanged.
The two laser beams with specific wavelength split by the multimode laser splitter 2 are respectively a measurement reference laser beam and a measurement sample laser beam.
The measurement reference laser beam is transmitted along the measurement reference light source line 18 and is used for detecting, analyzing and measuring the absorbance of the reference sample on the measurement reference light source line 18.
The measured sample laser beam is transmitted along the measured sample light source line 19, and the measured sample laser beam is used for detecting, analyzing and measuring the absorbance of the measured sample on the measured sample light source line 19, and further used for detecting, analyzing and measuring the content of nutrients in the sample.
The laser light source 1 is a laser emitting device with adjustable power, and the power of the laser emitting device can be adjusted to adjust the laser power emitted by the laser light source 1.
The laser light source 1 is the prior art and can be directly purchased from the market.
The circuit between the laser light source 1 and the multimode laser splitter 2 is a quartz optical fiber 6, and the laser emitted by the laser light source 1 is transmitted to the multimode laser splitter 2 through the quartz optical fiber 6.
By the design, the quartz optical fiber 6 can be used for guiding and transmitting laser emitted by the laser source 1, so that the laser source 1 and the multimode laser splitter 2 are conveniently arranged, and the use is convenient.
The measurement reference light source line 18 comprises a first collimating mirror 3, reference photoelectric detectors 4 are arranged on one side of the first collimating mirror 3 at intervals, and reference transmission cuvettes 5 are arranged between the first collimating mirror 3 and the reference photoelectric detectors 4 at intervals.
The first collimating mirror 3 and the reference photoelectric detector 4 are arranged in parallel, and a light beam gathering point of the first collimating mirror 3 and a detection point of the reference photoelectric detector 4 are positioned on the same straight line.
Design like this, conveniently lay first collimating mirror 3 and reference photoelectric detector 4, convenient detection then, and need not laying of other refractors, make nitrogen phosphorus potassium element content spectral analysis equipment overall structure simple in this crops cultivation matrix, facilitate the use.
The first collimating mirror 3 is used for condensing the measurement reference laser beam transmitted on the measurement reference light source line 18 and adjusting the position of the measurement reference laser beam.
The sample light source measuring circuit 19 comprises a second collimating mirror 31, a sample photoelectric detector 41 is arranged on one side of the second collimating mirror 31 at intervals, and a sample transmission cuvette 51 is arranged between the second collimating mirror 31 and the sample photoelectric detector 41 at intervals.
The second collimating mirror 31 and the sample photodetector 41 are arranged in parallel, and a light beam condensing point of the second collimating mirror 31 and a detection point of the sample photodetector 41 are located on the same straight line.
Design like this, conveniently lay second collimating mirror 31 and sample photoelectric detector 41, convenient detection then, and need not laying of other refractors, make nitrogen phosphorus potassium element content spectral analysis equipment overall structure simple in this crops cultivation matrix, facilitate the use.
The second collimator lens 31 is used to condense the measurement sample laser beam transmitted on the measurement sample light source line 19 and adjust the position of the measurement sample laser beam.
According to the design, when the content of nutrients in a sample needs to be measured, firstly, a continuous sample feeding system respectively inputs reference samples into the reference transmission colorimetric vessels 5, and the reference samples can be purified water; the continuous sample introduction system introduces the measurement sample into the sample transmission cuvette 51.
Then laser emitted by the laser source 1 is divided into a measurement reference laser beam and a measurement sample laser beam through the multimode laser splitter 2, the measurement reference laser beam is transmitted along the measurement reference light source line 18, the measurement reference laser beam is collected through the first collimating mirror 3 and then transmitted through the reference transmission cuvette 5 containing a reference sample, the measurement reference laser beam is imaged on a detection point of the reference photoelectric detector 4, and the reference photoelectric detector 4 is used for detecting the absorbance so as to obtain the reference absorbance.
Then, the measurement sample laser beam is transmitted along the measurement sample light source line 19, at this time, the measurement sample laser beam is collected by the second collimator lens 31, and then transmitted through the sample transmission cuvette 51 containing the measurement sample, at this time, the light of the measurement sample laser beam transmitted through the sample transmission cuvette 51 is absorbed by atoms in the sample transmission cuvette 51, and the measurement sample laser beam is imaged on a detection point of the sample photodetector 41, at this time, the sample photodetector 41 is used for detecting the absorbance of the measurement sample, and then the absorbance of the measurement sample is obtained.
And then through the formula: and (3) determining the absorbance of the sample, namely the reference absorbance = the actual absorbance of the sample, and then obtaining the actual absorbance of the sample, wherein the content of the nutrient in the determined sample to be determined can be accurately calculated through the actual absorbance of the sample.
Optical fibers 7 are respectively arranged between the multimode laser splitter 2 and the first collimating mirror 3 and the second collimating mirror 31, and the measurement reference laser beam and the measurement sample laser beam split by the multimode laser splitter 2 are respectively transmitted to the corresponding first collimating mirror 3 and the second collimating mirror 31 through the optical fibers 7.
By the design, the optical fiber 7 can be used for guiding and transmitting the measurement reference laser beam and the measurement sample laser beam which are split by the multimode laser splitter 2, so that the measurement reference laser beam and the measurement sample laser beam are conveniently transmitted, and the use is convenient.
The laser light source 1 emits laser light with a specific wavelength, and the laser light source 1 is detachably connected.
The number of the laser light sources 1 is three, and the three laser light sources 1 comprise a nitrogen element detection laser light source, a phosphorus element detection laser light source and a potassium element detection laser light source.
The nitrogen element detection laser light source is used for detecting, analyzing and determining the content of nitrogen elements in a sample, and the wavelength absorbed by the nitrogen elements is as follows: 210-230nm, and the wavelength of the nitrogen element detection laser light source is preferably 220 nm.
The phosphorus element detection laser light source is used for detecting, analyzing and determining the content of phosphorus elements in a sample, and the wavelength absorbed by the phosphorus elements is as follows: 460 ℃ and 490nm, the wavelength of the phosphorus element detection laser light source is preferably 490 nm.
The potassium element detection laser light source is used for detecting, analyzing and determining the content of potassium element in a sample, and the wavelength absorbed by the potassium element is as follows: 420-450nm, and the wavelength of the potassium element detection laser light source is preferably 440 nm.
The output ends of the reference photodetector 4 and the sample photodetector 41 are electrically connected to a signal processing unit 8, and the signal processing unit 8 is configured to process light intensity signals detected by the reference photodetector 4 and the sample photodetector 41.
The signal processing unit 8 is a conventional technology, and is used for processing and transmitting data.
The output end of the signal processing unit 8 is electrically connected with a fertilizing platform 9, and the fertilizing platform 9 is used for receiving the signal sent by the signal processing unit 8 and controlling a fertilizing machine to fertilize according to the signal.
The whole shape and specification of reference transmission cell 5 and sample transmission cell 51 are all the same, and all adopt printing opacity glass to make, the whole wall thickness of reference transmission cell 5 and sample transmission cell 51 is 2-5 mm.
All be provided with the stock solution cavity in reference transmission cell 5 and the sample transmission cell 51, the top of reference transmission cell 5 and sample transmission cell 51 all is provided with inlet 13 and the liquid outlet 14 that is linked together with the stock solution cavity.
Design like this, make through wholly adopting the printing opacity glass with reference transmission cell 5 and sample transmission cell 51, can conveniently pierce through reference transmission cell 5 and sample transmission cell 51 and form images on corresponding reference photoelectric detector 4 and sample photoelectric detector 41 by measuring beam, and then improve the accuracy of detected data, and can be used to respectively save corresponding reference sample and survey sample through the stock solution cavity, can make things convenient for reference sample and survey sample business turn over stock solution cavity through inlet 13 and liquid outlet 14.
As shown in fig. 3-4, the continuous sampling system includes a first peristaltic pump 10 and a second peristaltic pump 101, and liquid inlet ends and liquid outlet ends of the first peristaltic pump 10 and the second peristaltic pump 101 are respectively communicated with a liquid inlet pipe 11 and a liquid outlet pipe 12.
The liquid inlet pipe 11 of the first peristaltic pump 10 is communicated with the crop cultivation substrate nutrient in-situ collector 16, and the liquid outlet pipe 12 of the first peristaltic pump 10 is communicated with the liquid inlet 13 of the sample transmission cuvette 51.
And a liquid inlet pipe 11 of the second peristaltic pump 101 is communicated with the reference sample cell 20, and a liquid outlet pipe 12 of the second peristaltic pump 101 is communicated with a liquid inlet 13 of the reference transmission cuvette 5.
The reference cell 20 stores a reference sample.
The crop culture medium nutrient in-situ collector 16 is the prior art and can be directly purchased and obtained from the market.
And the crop cultivation substrate nutrient in-situ collector 16 is pre-embedded in the crop cultivation substrate, and water and fertilizer in the crop cultivation substrate are permeated into the crop cultivation substrate nutrient in-situ collector 16 through the permeation principle, so that a measurement sample in the crop cultivation substrate is obtained.
The first peristaltic pump 10 can suck the determination sample collected in the crop cultivation substrate nutrient in-situ collector 16 through the liquid inlet pipe 11, and convey the determination sample to the sample transmission cuvette 51 through the liquid outlet pipe 12, wherein the sample transmission cuvette 51 is used for storing the determination sample.
The second peristaltic pump 101 may draw the reference sample in the reference sample cell 20 through the liquid inlet tube 11, and deliver the reference sample to the reference transmission cuvette 5 through the liquid outlet tube 12, where the reference transmission cuvette 5 is used for storing the reference sample.
And first peristaltic pump 10 and second peristaltic pump 101 can carry out accurate measurement to survey sample and the reference sample of carrying in feed liquor pipe 11 and the drain pipe 12, make the liquid sample of splendid attire in reference transmission cell 5 and the sample transmission cell 51 unified, improve the accuracy of detected data.
As shown in fig. 3, a filter 17 is connected in series to the liquid inlet pipe 11 communicated with the first peristaltic pump 10 for filtering the liquid flowing through the liquid inlet pipe 11, so as to prevent the particulate impurities from entering the sample transmission cuvette 51 along with the liquid flowing through the liquid inlet pipe 11.
Outside this embodiment, also can establish ties on the feed liquor pipe 11 that second peristaltic pump 101 communicates and have a filter, the filter is used for filtering this feed liquor intraductal circulating liquid, avoids particulate impurity to get into in the reference transmission cell 5 through feed liquor pipe 11.
As shown in fig. 1-4, in this embodiment, the apparatus for analyzing content of nitrogen, phosphorus, and potassium elements in the crop cultivation substrate is used to detect content of nitrogen, phosphorus, and potassium nutrients in the crop cultivation substrate, and then three laser light sources 1 are needed, where the three laser light sources 1 are respectively a nitrogen element detection laser light source, a phosphorus element detection laser light source, and a potassium element detection laser light source, and the nitrogen element detection laser light source, the phosphorus element detection laser light source, and the potassium element detection laser light source are respectively used to detect content of nitrogen, phosphorus, and potassium nutrients in the corresponding crop cultivation substrate.
By the design, the contents of nitrogen, phosphorus and potassium nutrients in the crop cultivation medium can be respectively collected, detected and analyzed, the accuracy of detection and analysis data is improved, and the crop cultivation medium is convenient to use.
As shown in fig. 1 to 4, in the use, the content of nitrogen element in the crop cultivation substrate is measured as an example: firstly, the crop cultivation medium nutrient in-situ collector 16 is pre-embedded in the crop cultivation medium, and at the moment, water and fertilizer in the crop cultivation medium permeate into the crop cultivation medium nutrient in-situ collector 16 through the permeation principle, so that a measurement sample in the crop cultivation medium is obtained.
Then, the laser light source 1 is a nitrogen element detection laser light source which emits laser with the wavelength of 220 nm.
At the moment, the first peristaltic pump 10 and the second peristaltic pump 101 work, the first peristaltic pump 10 sucks a measurement sample collected in the crop cultivation substrate nutrient in-situ collector 16 through the liquid inlet pipe 11 and conveys the measurement sample to the sample transmission cuvette 51 through the liquid outlet pipe 12, and the second peristaltic pump 101 sucks a reference sample in the reference sample pool 20 through the liquid inlet pipe 11 and conveys the reference sample to the reference transmission cuvette 5 through the liquid outlet pipe 12.
At the moment, the laser light source 1 emits laser with the wavelength of 220nm, the laser with the wavelength of 220nm is transmitted to the multimode laser splitter 2 through the quartz optical fiber 6, the multimode laser splitter 2 splits the light source, and the reference laser beam and the sample laser beam are measured.
The measurement reference laser beam is transmitted along the measurement reference light source line 18, at this time, the measurement reference laser beam is collected by the first collimating mirror 3 and then transmitted through the reference transmission cuvette 5 containing the reference sample, and the measurement reference laser beam is imaged on a detection point of the reference photodetector 4, at this time, the reference photodetector 4 is used for detecting the absorbance, and further, the reference absorbance is obtained (for example, the absorbance detected by the reference photodetector 4 is 0.15).
The measuring sample laser beam is transmitted along the measuring sample light source line 19, at this time, the measuring sample laser beam is condensed by the second collimating mirror 31, and then is transmitted through the sample transmission cuvette 51 containing the measuring sample, at this time, the light of the measuring sample laser beam transmitted through the sample transmission cuvette 51 is absorbed by atoms in the sample transmission cuvette 51, and the measuring sample laser beam is imaged on a detection point of the sample photodetector 41, at this time, the sample photodetector 41 is used for detecting the absorbance of the measuring sample, and then the absorbance of the measuring sample is obtained (for example, the absorbance detected by the sample photodetector 41 is 0.35).
And then through the formula: and (2) measuring the absorbance of the sample, namely the reference absorbance = the actual absorbance of the sample, (for example, 0.35-0.15=0.2, in this case, 0.2 is the actual absorbance of the measured sample), and then obtaining the actual absorbance of the sample, wherein the content of the nitrogen element in the measured sample to be measured can be accurately calculated through the actual absorbance of the sample.
The content of phosphorus and potassium elements in a sample to be detected is required to be detected, and the detection principle is the same as that of the content of the nitrogen element.
The reference photodetector 4 and the sample photodetector 41 transmit the light intensity signal to the fertilization platform 9 through the signal processing unit 8, and the fertilization platform 9 is used for receiving the signal and controlling the fertilization machine to fertilize according to the signal.
The following are specifically mentioned: the concentration of nitrogen, phosphorus and potassium nutrients in the crop cultivation medium is an important factor influencing the growth of crops, and the crop cultivation medium also contains other trace elements such as: calcium, manganese, zinc, boron, iron, and the like.
The concentration of the trace elements such as calcium, manganese, zinc, boron, iron and the like in the soil-culture crop cultivation is measured by an inductively coupled plasma emission spectrometer (ICP).
Example 2: as shown in fig. 5, the sample transmission cuvette 51 in embodiment 1 may also adopt the structure shown in fig. 5, the sample transmission cuvette 51 is further provided with a reagent liquid inlet 15, and the reagent liquid inlet 15 is connected to a peristaltic pump through a communication pipeline.
Design like this, when need let in other auxiliaries to in the sample transmission cell 51, can make the feed liquor end of peristaltic pump communicate with the auxiliary agent through the communicating pipe, then the peristaltic pump can be used to the ration and absorbs the auxiliary agent and then carry to in the sample transmission cell 51 through communicating pipe and reagent inlet 15, facilitates the use.
For those skilled in the art, based on the teachings of the present invention, changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.
Claims (10)
1. Nitrogen phosphorus potassium element content spectral analysis equipment in crops culture medium, including laser light source (1), its characterized in that: the laser light source (1) is connected with a multimode laser branching unit (2) through a line, two light source lines are installed on the multimode laser branching unit (2), the two light source lines are respectively a measurement reference light source line (18) and a measurement sample light source line (19), and a continuous sample introduction system for continuously conveying a reference sample and a measurement sample for the measurement reference light source line (18) and the measurement sample light source line (19) is arranged on one side of the measurement reference light source line (18) and one side of the measurement sample light source line (19).
2. The apparatus for spectral analysis of nitrogen, phosphorus and potassium element content in crop cultivation substrate according to claim 1, characterized in that: the line between the laser source (1) and the multimode laser splitter (2) is a quartz optical fiber (6), laser emitted by the laser source (1) is transmitted to the multimode laser splitter (2) through the quartz optical fiber (6), the multimode laser splitter (2) splits the laser into two beams, namely a measurement reference laser beam and a measurement sample laser beam, the measurement reference laser beam is transmitted along a measurement reference light source line (18), and the measurement sample laser beam is transmitted along a measurement sample light source line (19).
3. The apparatus for analyzing the content of NPK in the substrate for crop cultivation according to claim 2, wherein: the reference light source measuring line (18) comprises a first collimating mirror (3), reference photoelectric detectors (4) are arranged on one side of the first collimating mirror (3) at intervals, and reference transmission cuvettes (5) are arranged between the first collimating mirror (3) and the reference photoelectric detectors (4) at intervals.
4. The device for spectral analysis of the content of nitrogen, phosphorus and potassium elements in the crop cultivation substrate as claimed in claim 3, wherein: the sample light source line (19) comprises a second collimating mirror (31), sample photoelectric detectors (41) are arranged on one side of the second collimating mirror (31) at intervals, and sample transmission cuvettes (51) are arranged between the second collimating mirror (31) and the sample photoelectric detectors (41) at intervals.
5. The device for the spectral analysis of the content of nitrogen, phosphorus and potassium elements in the crop cultivation substrate as claimed in claim 4, wherein: optical fibers (7) are respectively arranged between the multimode laser splitter (2) and the first collimating mirror (3) and the second collimating mirror (31), and the measured reference laser beam and the measured sample laser beam which are split by the multimode laser splitter (2) are respectively transmitted to the corresponding first collimating mirror (3) and the second collimating mirror (31) through the optical fibers (7).
6. The device for spectral analysis of the content of nitrogen, phosphorus and potassium elements in the crop cultivation substrate as claimed in claim 5, wherein: the laser light source (1) comprises a nitrogen element detection laser light source, a phosphorus element detection laser light source and a potassium element detection laser light source, and the nitrogen element detection laser light source, the phosphorus element detection laser light source and the potassium element detection laser light source are respectively used for detecting the content of nitrogen element, phosphorus element and potassium element in the crop cultivation substrate.
7. The apparatus for spectral analysis of nitrogen, phosphorus and potassium element content in crop cultivation substrate as claimed in claim 6, wherein: the wavelengths absorbed by the nitrogen elements are: 210-230nm, the wavelength of the nitrogen element detection laser light source is 220nm, and the wavelength absorbed by the phosphorus element is as follows: 460-490nm, the wavelength of the phosphorus element detection laser light source is 490nm, and the wavelength of potassium element absorption is: 420-450nm, and the wavelength of the laser light source for detecting the potassium element is 440 nm.
8. The apparatus for analyzing the content of NPK in the substrate for crop cultivation according to claim 7, wherein: a liquid storage cavity is arranged in each of the reference transmission cuvette (5) and the sample transmission cuvette (51), and a liquid inlet (13) and a liquid outlet (14) communicated with the liquid storage cavity are arranged above each of the reference transmission cuvette (5) and the sample transmission cuvette (51).
9. The apparatus for analyzing the content of NPK in the substrate for crop cultivation according to claim 8, wherein: the continuous sampling system comprises a first peristaltic pump (10) and a second peristaltic pump (101), and liquid inlet ends and liquid outlet ends of the first peristaltic pump (10) and the second peristaltic pump (101) are respectively communicated with a liquid inlet pipe (11) and a liquid outlet pipe (12).
10. The apparatus for analyzing the content of NPK in the substrate for crop cultivation according to claim 9, wherein: a liquid inlet pipe (11) of a first peristaltic pump (10) is communicated with a crop cultivation matrix nutrient in-situ collector (16), a liquid outlet pipe (12) of the first peristaltic pump (10) is communicated with a liquid inlet (13) of a sample transmission cuvette (51), a liquid inlet pipe (11) of a second peristaltic pump (101) is communicated with a reference sample pool (20), and a liquid outlet pipe (12) of the second peristaltic pump (101) is communicated with a liquid inlet (13) of a reference transmission cuvette (5).
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| CN (1) | CN212159557U (en) |
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2020
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