Novel soil humidity monitoring device based on laser-induced breakdown spectroscopy technology

Abstract

The utility model discloses a novel soil humidity monitoring device based on a laser-induced breakdown spectroscopy technology. The novel soil humidity monitoring device comprises a light source luminous part, a light path part, a spectrum detection part and a processing display part, the light source light-emitting part is used for emitting laser and comprises a laser generator; the light path part is used for reflecting the laser, so that the laser is completely shot on a detected soil sample, and the light path part comprises a reflecting mirror and a convex lens; the spectrum detection part is used for detecting a spectrum signal after the detected soil sample is shot by the laser and sending the spectrum signal to the spectrograph, and the spectrum detection part comprises an optical probe and the spectrograph; compared with the prior art, laser detection is adopted, the detection time is short, the accuracy is high, and the monitoring efficiency is greatly improved; the soil humidity monitoring device can efficiently monitor soil humidity and is suitable for various soil environments.

Description

Technical Field

[0001] This utility model relates to the field of organic Rankine cycle power generation equipment, specifically to a novel soil moisture monitoring device based on laser-induced breakdown spectroscopy technology. Background Technology

[0002] Traditional soil moisture monitoring techniques primarily rely on changes in resistivity and capacitance to measure soil moisture content. While these methods are effective enough for some applications, they have limitations in terms of accuracy and reliability, especially when influenced by soil type, salinity concentration, temperature, and other environmental factors. For example, different soil types (such as clay, sandy soil, and loam) have different electrical conductivity characteristics, which can lead to biases in the results obtained using traditional methods. Similarly, high salinity environments increase soil conductivity, potentially resulting in falsely reported higher moisture levels.

[0003] With the increasing severity of global climate change, water scarcity, and food security issues, accurate monitoring of soil moisture has become crucial. Effective water resource management requires accurate soil moisture data to guide irrigation decisions, maximizing water use efficiency, minimizing waste, and increasing crop yields. Furthermore, soil moisture data is critical for predicting floods, droughts, and other weather conditions, enabling timely preventative measures to mitigate potential negative impacts. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of traditional soil moisture monitoring technology, which is easily affected by environmental factors, resulting in insufficient accuracy and limitations. To this end, a novel soil moisture monitoring device based on laser-induced breakdown spectroscopy technology is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel soil moisture monitoring device based on laser-induced breakdown spectroscopy technology includes a light source, an optical path, a spectral detection, and a processing and display.

[0007] The light-emitting part of the light source is used to emit laser light, and the light-emitting part of the light source includes a laser generator;

[0008] The optical path section is used to reflect the laser so that the laser is completely focused onto the soil sample being tested. The optical path section includes a reflector and a convex lens.

[0009] The spectral detection section is used to detect the spectral signal of the soil sample after it has been subjected to laser irradiation, and to send the spectral signal to the spectrometer. The spectral detection section includes an optical probe and a spectrometer.

[0010] The processing and display section is used to process spectral signals, display the operation interface and monitoring results, and includes a processor and a display screen.

[0011] As a further preferred embodiment of the present invention, the light-emitting part of the light source further includes: a light-emitting hole disposed on the laser generator, a fixture for fixing the laser generator, and an enable signal channel, wherein one end of the enable signal channel is connected to the laser generator and the other end is connected to the processor.

[0012] As a further preferred embodiment of this utility model, the optical path part further includes: a reflector bracket for fixing the reflector, a light-transmitting hole disposed below the reflector, a convex lens bracket for fixing the convex lens, a stage for placing the soil sample to be tested, and an adjustable stage support. The adjustable stage support is disposed below the stage and is fixedly connected to the stage by a snap fastener. The stage is disposed below the convex lens, and the center of the stage is located on the same vertical plane as the laser optical path.

[0013] As a further preferred embodiment of this invention, the spectral detection section further includes an adjustable optical probe bracket for fixing the optical probe, a coupled optical fiber communication channel, a band splitter, and a spectral information transmission channel. One end of the coupled optical fiber communication channel is connected to the optical probe, and the other end is connected to the band splitter. The band splitter decomposes the spectral signal and sends it to the spectrometer. One end of the spectral information transmission channel is connected to the spectrometer, and the other end is connected to the processor.

[0014] As a further preferred embodiment of this invention, the processing and display section further includes: a data cable, a power cable, and a power interface, wherein the data cable is used to connect the processor and the display screen.

[0015] This invention proposes a novel soil moisture monitoring device based on laser-induced breakdown spectroscopy technology, which has the following advantages compared with existing technologies:

[0016] 1. This utility model can efficiently monitor soil moisture and is suitable for various soil environments;

[0017] 2. This utility model uses laser detection, which has a short detection time and high accuracy, greatly improving monitoring efficiency;

[0018] 3. This utility model is small in size, effectively solving the problem of large footprint of related testing products. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the light-emitting part of the light source;

[0021] Figure 3 This is a schematic diagram of the optical path section;

[0022] Figure 4 This is a schematic diagram of the spectral detection section;

[0023] Figure 5 This is a schematic diagram of the structure of the display processing section.

[0024] The meanings of the labels in the attached diagram are as follows: 1. Light source, 11. Laser generator, 12. Light emission aperture, 13. Fixture, 14. Enable signal channel; 2. Optical path, 21. Reflector, 22. Reflector bracket, 23. Light passage, 24. Convex lens, 25. Convex lens bracket, 26. Stage, 27. Adjustable stage support; 3. Spectral detection section, 31. Optical probe, 32. Adjustable optical probe bracket, 33. Coupled fiber optic communication channel, 34. Band splitter, 35. Spectrometer, 36. Spectral information transmission channel; 4. Processing and display section, 41. Processor, 42. Display screen, 43. Data cable. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] This invention relates to a novel soil moisture monitoring device based on laser-induced breakdown spectroscopy technology. This device overcomes the limitations of traditional technologies, providing more accurate and reliable measurement results, and is adaptable to various soil types and environmental conditions. The introduction of this new technology will provide more scientific data support for agricultural production, lay the technological foundation for agricultural mechanization and automation, and also contribute to environmental protection and sustainable development.

[0027] This invention employs an Nd:YAG laser (neodymium-doped yttrium aluminum garnet laser), using a mirror to alter the laser's propagation direction and a 5-centimeter convex lens to focus the laser beam onto the soil surface. This method heats a tiny portion of the soil surface to a plasma state, while a 4-channel spectrometer captures the signals released by the plasma and transmits them to a processor for analysis. Although the laser's impact induces the soil sample to transform into a plasma state, this effect is limited to the micrometer level, constituting an industrial-grade non-destructive testing method with no negative impact on soil moisture measurement.

[0028] Example 1: Combining Figure 1-5 A novel soil moisture monitoring device based on laser-induced breakdown spectroscopy technology includes a light source 1, an optical path 2, a spectral detection 3, and a processing and display 4.

[0029] The light-emitting part 1 of the light source is used to emit laser light. The light-emitting part 1 of the light source includes a laser generator 11, a light-emitting hole 12 disposed on the laser generator 11, and a fixture 13 for fixing the laser generator 11 to enable signal channel 14. One end of the enable signal channel 14 is connected to the laser generator 11, and the other end is connected to the processor 41.

[0030] The optical path section 2 is used to reflect the laser so that the laser is completely focused on the soil sample being tested. The optical path section 2 includes a reflector 21, a convex lens 24, a reflector support 22 for fixing the reflector 21, a light-transmitting hole 23 located below the reflector 21, a convex lens support 25 for fixing the convex lens 24, a stage 26 for placing the soil sample being tested, and an adjustable stage support 27. The adjustable stage support 27 is located below the stage 26 and is fixedly connected to the stage 26 by a snap-fit. The stage 26 is located below the convex lens 24, and the center of the stage 26 is located on the same vertical plane as the laser optical path.

[0031] The spectral detection section 3 is used to detect the spectral signal of the soil sample after being subjected to laser irradiation and send the spectral signal to the spectrometer 35. The spectral detection section 3 includes a light probe 31, a spectrometer 35, an adjustable light probe bracket 32 ​​for fixing the light probe 31, a coupled optical fiber communication channel 33, a band decomposer 34, and a spectral information transmission channel 36. One end of the coupled optical fiber communication channel 33 is connected to the light probe 31, and the other end is connected to the band decomposer 34. The band decomposer 34 decomposes the spectral signal and sends it to the spectrometer 35. One end of the spectral information transmission channel 36 is connected to the spectrometer 35, and the other end is connected to the processor 41.

[0032] The processing and display section 4 is used to process spectral signals, display the operation interface and monitoring results. The processing and display section 4 includes a processor 41, a display screen 42, a data cable 43, a power cable and a power interface. The data cable 43 is used to connect the processor 41 and the display screen 42.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A novel soil moisture monitoring device based on laser-induced breakdown spectroscopy, characterized in that, It includes a light source (1), an optical path (2), a spectrum detection (3), and a processing and display (4). The light-emitting part (1) of the light source is used to emit laser light, and the light-emitting part (1) of the light source includes a laser generator (11). The optical path part (2) is used to reflect the laser so that the laser is completely shot onto the soil sample being tested. The optical path part (2) includes a reflector (21) and a convex lens (24). The spectral detection section (3) is used to detect the spectral signal of the soil sample after being shot by a laser and send the spectral signal to the spectrometer (35). The spectral detection section (3) includes a light probe (31) and a spectrometer (35). The processing and display section (4) is used to process spectral signals, display the operation interface and monitoring results. The processing and display section (4) includes a processor (41) and a display screen (42).

2. The novel soil moisture monitoring device based on laser-induced breakdown spectroscopy technology according to claim 1, characterized in that, The light-emitting part (1) of the light source also includes: a light-emitting hole (12) disposed on the laser generator (11), a fixture (13) for fixing the laser generator (11) and an enable signal channel (14), one end of the enable signal channel (14) being connected to the laser generator (11) and the other end being connected to the processor (41).

3. The novel soil moisture monitoring device based on laser-induced breakdown spectroscopy technology according to claim 1, characterized in that, The optical path part (2) further includes: a mirror bracket (22) for fixing the mirror (21), a light-transmitting hole (23) disposed below the mirror (21), a convex lens bracket (25) for fixing the convex lens (24), a stage (26) for placing the soil sample to be tested, and an adjustable stage support (27). The adjustable stage support (27) is disposed below the stage (26) and is fixedly connected to the stage (26) by a snap fastener. The stage (26) is disposed below the convex lens (24), and the center of the stage (26) is located on the same vertical plane as the laser optical path.

4. A novel soil moisture monitoring device based on laser-induced breakdown spectroscopy technology according to claim 1, characterized in that, The spectral detection section (3) also includes an adjustable optical probe bracket (32) for fixing the optical probe (31), a coupled optical fiber communication channel (33), a band decomposer (34), and a spectral information transmission channel (36). One end of the coupled optical fiber communication channel (33) is connected to the optical probe (31), and the other end is connected to the band decomposer (34). The band decomposer (34) decomposes the spectral signal and sends it to the spectrometer (35). One end of the spectral information transmission channel (36) is connected to the spectrometer (35), and the other end is connected to the processor (41).

5. A novel soil moisture monitoring device based on laser-induced breakdown spectroscopy technology according to claim 1, characterized in that, The processing and display section (4) further includes: a data cable (43), a power cable and a power interface, wherein the data cable (43) is used to connect the processor (41) and the display screen (42).

Images