Raman spectrum-based fertilizer liquid component online rapid detection device

Abstract

The utility model relates to a Raman spectrum-based fertilizer liquid component online rapid detection device, which comprises an acquisition mechanism, an execution mechanism, an optical mechanism and a control mechanism, the acquisition mechanism comprises a fertilizer liquid pipeline, a liquid level sensor and a fertilizer liquid acquisition chamber, the fertilizer liquid pipeline is connected with the fertilizer liquid acquisition chamber for fertilizer liquid diversion, the liquid level sensor is arranged in the fertilizer liquid acquisition chamber, and the execution mechanism is connected with the optical mechanism. One end of a Raman probe of the optical mechanism is connected with a laser light source based on an optical fiber and irradiates the fertilizer liquid collection chamber through the probe, and the other end is connected with a monochromator based on an optical fiber, and the monochromator is connected with a charge-coupled device. The device can realize accurate online detection of the types and concentrations of various nutrient elements in the mixed fertilizer solution, breaks through the limitation of a traditional method, can accurately and quickly detect the types and concentrations of various fertilizer solutions on line in real time without depending on experience and complex laboratory analysis, and has a wide application prospect. In the detection process, a dynamic flowing environment of the fertilizer liquid can be converted into a static detection environment, so that high stability of detection is kept.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of spectral detection technology, and in particular to a fertilizer solution component online rapid detection device based on Raman spectrum. BACKGROUND

[0002] The rapid and accurate detection of fertilizer solution components is a key link for realizing the intelligentization of water-fertilizer integrated systems and a major challenge in this field. At the present stage, water-fertilizer integrated systems urgently need technical equipment capable of rapidly, online and accurately detecting the types and concentrations of fertilizer solution components, so as to effectively improve the precision of irrigation and fertilization and promote the sustainable development of agriculture.

[0003] The existing fertilizer solution component online detection device has problems such as inability to identify the types and concentrations of multiple nutrient elements in mixed fertilizer solution, detection lag, large volume, complex operation and unstable detection in actual application. Compared with traditional fertilizer solution component detection methods, the Raman spectrum detection method realizes qualitative and quantitative analysis of components by measuring the light scattering intensity of chemical bonds in a substance at a specific wavelength, and the fertilizer solution component detection device based on Raman spectrum technology has not been used in actual agricultural engineering to realize online detection. CONTENT OF THE UTILITY MODEL

[0004] To solve or partially solve the problems in the related art, the present application provides a fertilizer solution component online rapid detection device based on Raman spectrum, which can realize online rapid detection of fertilizer solution component information and lay a foundation for improving the intelligentization level of water-fertilizer integrated systems.

[0005] The first aspect of the present application provides a fertilizer solution component online rapid detection device based on Raman spectrum, comprising:

[0006] The acquisition mechanism comprises a fertilizer solution pipeline, a liquid level sensor and a fertilizer solution acquisition chamber, the fertilizer solution pipeline is connected with the fertilizer solution acquisition chamber for guiding the flow of fertilizer solution, and the liquid level sensor is arranged in the fertilizer solution acquisition chamber;

[0007] The execution mechanism comprises an electromagnetic valve and a micro water pump, the electromagnetic valve is arranged on the fertilizer solution pipeline for controlling the opening and closing of the inlet and outlet of the pipeline, and the micro water pump is fixedly arranged in the fertilizer solution pipeline;

[0008] The optical mechanism comprises a Raman probe, an optical fiber, a laser light source, a monochromator and a charge coupled device, one end of the Raman probe is connected with the laser light source based on the optical fiber and irradiates to the fertilizer solution acquisition chamber through the probe, the other end of the Raman probe is connected with the monochromator based on the optical fiber, and the monochromator is connected with the charge coupled device;

[0009] The control mechanism comprises a controller and a touch screen, the touch screen is arranged on the device shell, and the controller is connected with the charge coupled device, the micro water pump, the electromagnetic valve and the liquid level sensor.

[0010] The fertilizer liquid pipeline comprises an outer liquid pipeline and an inner liquid pipeline, the outer liquid pipeline is used for being connected with a to-be-tested fertilizer liquid pipeline, the outer liquid pipeline is provided with a fertilizer inlet and a fertilizer outlet, and the fertilizer inlet and the fertilizer outlet are communicated with the inner liquid pipeline.

[0011] The fertilizer liquid collecting chamber is made of a quartz glass sheet, so that the fertilizer liquid is completely isolated from the outside.

[0012] The liquid level sensor comprises a high liquid level sensor and a low liquid level sensor, and is used for detecting whether the fertilizer liquid is at a lowest or highest liquid level.

[0013] The technical scheme provided in the application can have the following beneficial effects:

[0014] The application provides a fertilizer liquid component online rapid detection device based on Raman spectrum, which can realize accurate online detection of various nutrient element types and concentrations in mixed fertilizer liquid. The device breaks through the limitations of traditional methods and can realize real-time, accurate, online and rapid detection of various fertilizer liquid types and concentrations without relying on experience and complex laboratory analysis. The device has reasonable structure, simple operation and small size, and can convert the dynamic flow environment of the fertilizer liquid into a static detection environment during the detection process, thereby maintaining high stability of the detection. The device effectively solves the problem that existing detection devices can only detect overall concentration or single fertilizer liquid type, breaks through the bottleneck of being unable to identify the types and concentrations of various nutrient elements in mixed fertilizer liquid, and has detection lag, provides a strong basis for accurate fertilization, lays a foundation for intelligent water and fertilizer integration, comprehensively improves agricultural production efficiency, and promotes the sustainable development of agriculture.

[0015] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other objects, features and advantages of the application will become more apparent from the following detailed description of exemplary embodiments of the application taken in conjunction with the accompanying drawings, in which like reference characters refer to the like parts throughout the different views.

[0017] Figure 1 is a structural schematic diagram of the device shown in the embodiments of the application;

[0018] Figure 2 is a controller connection schematic diagram of the device shown in the embodiments of the application;

[0019] Figure 3 is a detection flow schematic diagram of the device shown in the embodiments of the application;

[0020] Reference signs:

[0021] In the figure: 1 - shell; 2 - fertilizer inlet; 3 - fertilizer outlet; 4 - outer liquid pipeline; 5 - inner liquid pipeline; 6 - outlet electromagnetic valve; 7 - inlet electromagnetic valve; 8 - fertilizer liquid collection chamber; 9 - low liquid level sensor; 10 - high liquid level sensor; 11 - micro water pump; 12 - touch screen; 13 - Raman probe; 14 - optical fiber; 15 - laser light source; 16 - monochromator; 17 - charge coupled device; 18 - controller. DETAILED DESCRIPTION

[0022] Embodiments of the present application will be described in more detail with reference to the drawings. Although embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application is more thoroughly and completely conveyed to those skilled in the art, and the scope of the present application is fully conveyed to those skilled in the art.

[0023] It should be understood that although the terms "first", "second", "third", etc. are used to describe various information in the present application, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0024] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] The technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings.

[0027] As Figure 1 shown in a kind of based on Raman spectrum's fertilizer solution component on-line fast detection device, including: shell 1 and setting in shell 1 acquisition mechanism, executive mechanism, optical mechanism and control mechanism.

[0028] Acquisition mechanism includes fertilizer solution pipeline, liquid level sensor and fertilizer solution acquisition chamber 8, fertilizer solution pipeline is connected with fertilizer solution acquisition chamber 8 for fertilizer solution flow guide, and fertilizer solution pipeline includes inner liquid pipeline 5 and outer liquid pipeline 4, outer liquid pipeline 4 is used to connect with the pipeline of the fertilizer solution to be measured, outer liquid pipeline 4 is provided with fertilizer inlet 2 and fertilizer outlet 3, inner liquid pipeline is communicated with outer liquid pipeline by fertilizer inlet 2 and fertilizer outlet 3, and is connected with fertilizer solution acquisition chamber 8, the liquid to be measured is flowed into fertilizer solution acquisition chamber 8 from the pipeline of the fertilizer solution to be measured, outer liquid pipeline 4, inner liquid pipeline 5, and is discharged from fertilizer solution acquisition chamber 8 after detection.

[0029] Fertilizer solution acquisition chamber 8 uses quartz glass sheet, need not consider the flow rate of fertilizer solution in pipeline and the like, can make fertilizer solution stand in acquisition chamber, and can be completely isolated from the outside, guarantee the condition of nondestructive testing. Fertilizer solution acquisition chamber 8 is fixed with two liquid level sensors on both sides, low liquid level sensor 9 is used to detect the position of liquid level just covering Raman probe 13 after feedback to control mechanism, to realize starting detection;High liquid level sensor 10 is used to detect the feedback to control mechanism after the highest position of liquid level, to avoid the burst of fertilizer solution acquisition chamber 8 due to liquid overfill.

[0030] Executive mechanism, including electromagnetic valve and micro water pump 11, inlet electromagnetic valve 7 and outlet electromagnetic valve 6 are fixedly arranged on the upper portion of inner liquid pipeline, which controls the opening and closing of valve through the electric signal of electromagnetic coil, and then controls the pass and off of inner liquid pipeline 5.Micro water pump 11 is fixedly arranged in inner liquid pipeline 5, and is used to adjust the flow direction of liquid, to facilitate the introduction and export of fertilizer solution.

[0031] Optical mechanism, including Raman probe 13, optical fiber 14, laser light source 15, monochromator 16 and charge coupled device 17.Raman probe 13 is irradiated to fertilizer solution acquisition chamber 8 by probe, and is connected with laser light source 15 by optical fiber 14 at one end, and is connected with monochromator 16 by optical fiber 14 at the other end, and monochromator 16 is connected with charge coupled device 17.

[0032] The Raman probe 13 includes a collimating lens, a filter, a condenser and a probe, the collimating lens is used to convert the emitted laser into parallel light, the filter is used to filter out other light sources, the condenser is used to concentrate the useful light after filtering, and the probe is used to collect and transmit the scattered light in the fertilizer solution to the monochromator 16; the optical fiber 14 is used for efficient transmission of the laser light source 15 and the Raman scattering signal, providing flexibility, stability and remote detection capability, optimizing system performance and adaptability; the laser light source 15 is the main energy source for exciting molecules in the sample to produce Raman scattering, when the laser irradiates on the sample, the molecules in the sample will be excited by the photons to produce scattered light, a small part of which is Raman scattered light, which contains the vibration or rotation information of the sample molecules, and is the key signal for analyzing the chemical composition and structure of the material; the monochromator 16 is used to separate and analyze the Raman scattering light generated by the sample from the Raman probe 13, and according to the wavelength, the light is spectrally dispersed, high-resolution spectra are provided, and stray light is filtered out; the charge-coupled device 17 converts the Raman scattering light signal after the monochromator 16 into an electrical signal, realizing high-sensitivity optical signal detection and imaging.

[0033] The control mechanism includes a controller 18 and a touch screen 12, and the touch screen 12 is an eDP touch screen 12 arranged on the device shell 1. The controller 18 is a LattePanda 3Delta, which has strong computing power and can carry a Windows operating system, can meet the rapid inference of the deep learning model and the configuration of the deep learning environment, and can realize data communication with the optical mechanism.

[0034] The connection of the control mechanism is as shown in Figure 2 The control mechanism is responsible for data collection, spectral analysis and result display. ① Data collection: the LattePanda 3Delta communicates with the optical mechanism, transmits the spectral data in real time, collects the Raman spectral data from the optical mechanism, and controls the electromagnetic valve and the micro water pump 11; ② Spectral analysis: in the early stage, the optical mechanism is used to obtain different fertilizer Raman spectral data samples and use a deep learning model for qualitative and quantitative modeling, and an optimal fertilizer type recognition model and a fertilizer content prediction model are constructed, and after the model is deployed to the LattePanda 3Delta embedded edge computing device, the LattePanda 3Delta has the ability to complete the spectral analysis. ③ Result display: a GUI human-computer interaction interface is created by using PyQt5, the interface integrates fertilizer component type recognition and fertilizer concentration prediction function modules, and displays the type and concentration information of each type of nutrient component in the fertilizer sample in real time. Through the above process, the control mechanism can efficiently and accurately realize online detection of fertilizer components and provide real-time feedback, providing a scientific basis for precision fertilization in agricultural production.

[0035] As shown in Figure 3The use process of the device shown is as follows:

[0036] First, open the LattePanda 3Delta microcontroller 18, and enter the control interface through the eDP touch screen 12. At this time, the laser power is set to the maximum value to ensure that a strong enough Raman signal is obtained; at the same time, the scanning time is set to 8s, the integration time is set to 5s, and the spectral scanning range is set to 0-1500cm-1 to obtain the key spectral information of the main nutrient components in the fertilizer solution. Real-time communication is carried out between the LattePanda 3Delta and the optical mechanism, and the electromagnetic valve and the micro water pump 11 are controlled.

[0037] Next, turn on the laser light source 15 to emit laser light, and the laser beam is adjusted through the collimating lens, the filter, and the condenser lens to ensure the focusing and stability of the laser beam. Then, the laser beam processed by these optical elements is irradiated to the fertilizer solution collection chamber 8 through the probe. It should be noted that the Raman probe 13 does not directly contact the fertilizer solution, but is isolated by a quartz glass sheet to ensure the stability and accuracy of the detection system while avoiding sample contamination.

[0038] Then, close the outlet electromagnetic valve 6, open the inlet electromagnetic valve 7, and start the micro water pump 11. The fertilizer solution flows into the inner liquid pipeline through the fertilizer inlet 2 of the outer liquid pipeline, and then flows into the fertilizer solution collection chamber 8. When the low liquid level sensor 9 detects that the fertilizer solution in the fertilizer solution collection chamber 8 just covers the Raman probe 13, the detection program is started by pressing the "start detection" button on the eDP touch screen 12, and the Raman probe 13 starts to work immediately to collect the Raman light signals scattered by the fertilizer solution, so as to realize the start of detection. When the high liquid level sensor 10 detects that the fertilizer solution in the fertilizer solution collection chamber 8 reaches the highest position, the inlet electromagnetic valve 7 and the micro water pump 11 are closed.

[0039] Subsequently, the Raman scattered light collected by the Raman probe 13 is transmitted to the monochromator 16. The monochromator 16 separates and analyzes the wavelength of the Raman scattered light and converts it into spectral data for subsequent processing. After the spectral data is accurately adjusted by the monochromator 16, it is transmitted to the charge-coupled device 17, which converts these light signals into electrical signals to generate current signals related to the Raman scattering intensity. In this way, the signals obtained by the charge-coupled device 17 accurately reflect the content and distribution of each nutrient component in the fertilizer solution sample.

[0040] Finally, the Raman spectrum data is transmitted to the LattePanda 3 Delta microcontroller 18 through the charge-coupled device 17. On the microcontroller 18, the deep learning recognition model of the optimal fertilizer solution type and the deep learning prediction model of the fertilizer solution content have been deployed, which can accurately identify the types of different components in the fertilizer solution and quantitatively analyze the concentrations of each component in the fertilizer solution. Based on the collected spectrum data, the type and content of each component of the fertilizer solution are quickly derived, and the results are displayed through the touch screen 12, and real-time feedback is given to the user. After the detection is completed, the outlet electromagnetic valve 6 and the inlet electromagnetic valve 7 are opened, and the micro water pump 11 is started, so that the fertilizer solution in the fertilizer solution collection chamber 8 and the internal fertilizer solution pipeline flows out, and the detection is completed.

[0041] Finally, it should also be noted that the relationship such as first and second, and the like, is only used to distinguish one entity or operation from another, and does not necessarily require or imply any such actual relationship or order between the entities or operations. In addition, the term includes, includes or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0042] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0043] The above has described the embodiments of the present application, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical application or improvement of technology in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A device for on-line rapid detection of fertilizer solution components based on Raman spectroscopy, characterized in that, The application relates to a fertilizer liquid collecting device, which comprises a collecting mechanism, an executing mechanism, an optical mechanism and a control mechanism. The collecting mechanism comprises a fertilizer liquid pipeline, a liquid level sensor and a fertilizer liquid collecting chamber, the fertilizer liquid pipeline is connected with the fertilizer liquid collecting chamber for guiding fertilizer liquid, and the liquid level sensor is arranged in the fertilizer liquid collecting chamber. The executing mechanism comprises an electromagnetic valve and a micro water pump, the electromagnetic valve is arranged on the fertilizer liquid pipeline for controlling the opening and closing of the inlet and outlet of the pipeline, and the micro water pump is fixedly arranged in the fertilizer liquid pipeline. The optical mechanism comprises a Raman probe, an optical fiber, a laser light source, a monochromator and a charge coupled device, one end of the Raman probe is connected with the laser light source based on the optical fiber and irradiates the fertilizer liquid collecting chamber through the probe, the other end of the Raman probe is connected with the monochromator based on the optical fiber, and the monochromator is connected with the charge coupled device. The control mechanism comprises a controller and a touch screen, the touch screen is arranged on the device shell, and the controller is connected with the charge coupled device, the micro water pump, the electromagnetic valve and the liquid level sensor. 2.The Raman spectrum-based online rapid detection device for fertilizer solution components according to claim 1, characterized in that, The fertilizer liquid pipeline comprises an outer liquid pipeline and an inner liquid pipeline, the outer liquid pipeline is used for being connected with a to-be-detected fertilizer liquid pipeline, the outer liquid pipeline is provided with an inlet and an outlet, and the inlet and the outlet are communicated with the inner liquid pipeline. 3.The Raman spectrum-based online rapid detection device for fertilizer solution components according to claim 1, characterized in that, The fertilizer liquid collecting chamber is made of a quartz glass sheet, so that the fertilizer liquid is completely isolated from the outside world. 4.The Raman spectrum-based online rapid detection device for fertilizer solution components according to claim 1, characterized in that, The liquid level sensor comprises a high liquid level sensor and a low liquid level sensor, which are used for detecting whether the fertilizer liquid is at the lowest or highest liquid level.

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