A non-invasive soil gas in-situ detection device

Abstract

The present application relates to the technical field of soil gas in-situ detection, and particularly relates to a non-invasive soil gas in-situ detection device. The technical scheme comprises a flux cover, a multi-stage valve, a sandwich plate, an air inlet pipe, a detection box, a power supply box and a photovoltaic frame. The flux cover is made of black acrylic material, and a black nylon net is fixed to the bottom of the flux cover through the sandwich plate. The two parts cooperate to absorb solar radiation heat energy, heat the gas in the cover to form a thermal-driven 'chimney effect', and thus passively enrich volatile and semi-volatile organic pollutant gases in the soil. The enriched gas is introduced into the detection box through the multi-stage valve and the air inlet pipe, and the detection box can integrate multiple detection modules to realize multi-method collaborative rapid analysis. The power supply box and the photovoltaic frame form a composite power supply structure of 'photovoltaic power generation and main and auxiliary batteries', which guarantees long-term stable operation in the field. The present application realizes in-situ, rapid and micro-disturbance detection and tracing of soil gas in contaminated sites, greatly improves the efficiency of pollution investigation, and reduces the cost and environmental risk.

Description

Technical Field

[0001] This invention relates to the field of soil gas in-situ detection technology, and in particular to a non-invasive soil gas in-situ detection device. Background Technology

[0002] In recent years, with the rapid development of industry and agriculture, soil pollution has become increasingly prevalent. Volatile / semi-volatile pollutants such as benzene compounds, halogenated hydrocarbons, and aromatic hydrocarbons are widely present. These pollutants inhibit the activity of microorganisms in the soil, affect vegetation growth and development, and thus damage their corresponding ecosystem service functions, such as crop yield reduction and landscape destruction. In addition, they can also cause public health risks such as respiratory diseases and nerve damage through inhalation, skin contact, and ingestion.

[0003] Currently, investigations and source tracing of contaminated sites primarily rely on drilling and sampling followed by laboratory analysis. However, this method depends on large-scale machinery, resulting in long testing cycles, high costs, and data loss during sample transport. Furthermore, laboratory personnel often prioritize instrument operation and lack background knowledge in contaminated site investigation, hindering timely data interpretation and contamination identification. The economic efficiency and applicability of traditional methods are significantly reduced, especially for large-scale contaminated sites. Secondly, drilling operations can damage soil structure, potentially increasing the risk of pollutant spread and secondary pollution. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background art by proposing a non-invasive in-situ soil gas detection device.

[0005] This application provides a non-invasive soil gas in-situ detection device, including a flux hood. The flux hood is made of black acrylic material, is bottomless and hollow, and has an extension platform at the bottom for attaching to the ground to be tested. A sandwich panel is fixedly installed at the bottom of the flux hood. The sandwich panel includes a sandwich base plate and a black nylon mesh disposed thereon. The black nylon mesh and the black acrylic cover together absorb solar radiation heat energy to heat the gas inside the cover, forming a heat-driven chimney effect; the detection device also includes a multi-stage valve. The multistage valve is connected to the top side opening of the flux hood to control and guide the outflow of the enriched gas. An air inlet pipe is installed at the output end of the multistage valve, and a detection box is installed at the output end of the air inlet pipe. The detection box has at least one gas detection module built in it for in-situ rapid analysis and detection of the input enriched gas. A power supply box is installed on the top of the detection box, and a photovoltaic frame is installed on the top of the power supply box. The multistage valve includes a connecting platform, a pagoda-shaped inlet, and a connecting pipe; the bottom of the connecting platform is connected to the opening on the top side of the flow hood, and an internal threaded connector is provided inside the connecting platform; the pagoda-shaped inlet has an external threaded connector and a multistage tower head, and the external threaded connector is connected to the internal threaded connector of the connecting platform; one end of the connecting pipe is connected to the multistage tower head, and the other end is connected to the air inlet pipe.

[0006] Optionally, the connecting platform is hollow inside, its outer wall forms the connecting platform shell, and its inner wall is threaded. The multi-stage valve is configured to adapt to pipelines with a nominal diameter in the range of 3mm to 10mm, and the pagoda opening is provided with a multi-stage valve for controlling the opening and closing of the gas flow path.

[0007] Optionally, the testing box includes an air valve, a honeycomb ventilation grid, a stand, a display, a main circuit input connector, and a secondary circuit input connector; One end of the air valve is connected to the inside of the testing box, and the other end is connected to the air inlet pipe; the honeycomb ventilation grille is located on both sides of the testing box; the legs are rounded truncated pyramid structures, symmetrically distributed at the four corners of the bottom of the box body; the display is located on the front of the testing box and connected to the built-in testing module; the main circuit input connector is located on one side of the testing box.

[0008] Optionally, the main circuit input connector is connected to the main circuit output connector of the power supply box via a main circuit cable, and the secondary circuit input connector is connected to the secondary circuit output connector of the power supply box via a secondary circuit cable.

[0009] Optionally, the air valve is a check valve, and a carrying handle is fixedly provided at the top center of the flow hood.

[0010] Optionally, the power supply box is electrically connected to the detection box, and an on / off button is provided on one side of the box. The photovoltaic frame is connected to the photovoltaic circuit input connector of the power supply box to provide photovoltaic power to it.

[0011] Optionally, the photovoltaic frame includes a front support plate, a back support plate, a rotating shaft, and an adjusting arm; The front support plate is equipped with a battery cell array; the front support plate and the back support plate are connected by the pivot; the adjusting arm is connected between the front support plate and the back support plate to adjust the tilt angle of the front support plate. The front support plate is equipped with a battery cell array on the front and has front plate grooves on both sides of the back. The back support plate has back plate grooves of the same specification on both sides of the front. The front has a hexagonal internal thread hole in the center and a photovoltaic circuit output interface on the side, which is connected to the photovoltaic circuit input connector through a photovoltaic circuit cable. The front support plate and the back support plate are connected by the pivot.

[0012] Optionally, the adjusting arm includes a support rod, a coarse adjusting screw, and a fine adjusting screw, the coarse adjusting screw and the fine adjusting screw being disposed on the support rod.

[0013] Optionally, the tilt angle adjustment range of the photovoltaic frame is 0° to 65°.

[0014] Optionally, the connecting holes distributed on the extension platform include large holes and small holes in the cover body, and the sandwich base plate is correspondingly provided with large holes and small holes in the sandwich layer. The black nylon mesh is fixed by fasteners passing through the small holes in the cover body and the small holes in the sandwich layer in sequence.

[0015] In summary, this application includes at least one of the following beneficial technical effects: In this invention, the flux hood is mainly made of black acrylic light-transmitting material, which has the characteristics of low cost, high strength and lightweight, and can be reused. The bottom is embedded with black nylon mesh through a sandwich panel. The two work together to efficiently absorb and retain solar radiation heat energy, enhance the passive heating of the gas inside the chamber and maintain thermal stability, so that a "chimney effect" is formed inside the chamber to promote the diffusion and accumulation of volatile pollutants into the flux hood, providing favorable conditions for subsequent high-sensitivity sampling and source tracing. In addition, the flux hood, together with the extended structure and flexible material at the bottom, can adapt to complex terrain and environment in the field.

[0016] Furthermore, the detection box can integrate one or more modules, including but not limited to chromatography-mass spectrometry, spectral detection, photoionization detection, and adsorption thermal desorption, according to the characteristics of site pollution and detection needs. With the help of a multi-valve structure, it can realize multi-channel synchronous sampling and multi-method collaborative analysis, thereby improving the efficiency and accuracy of site pollution investigation.

[0017] Finally, the three-power supply architecture of "photovoltaic power generation + main and auxiliary capacitors" enhances its stability and adaptability in field operation, while reducing carbon emissions from some traditional electricity consumption. In addition, the photovoltaic panels can be tilted by means of a rotating shaft and adjusting arm to maximize their power generation potential in different regions and times. When not in use, the photovoltaic panels can be folded up and stored to reduce damage to the panels and improve their portability and service life. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of a non-invasive soil gas in-situ detection device according to the present invention is provided. Figure 2 This is a schematic diagram of the flux hood structure; Figure 3 This is a schematic diagram of a multi-stage valve structure; Figure 4 This is a schematic diagram of a sandwich panel structure; Figure 5 This is a schematic diagram of the front structure of the testing box; Figure 6 This is a schematic diagram of the side structure of the testing box; Figure 7 This is a schematic diagram of the front structure of the photovoltaic frame; Figure 8 This is a schematic diagram of the side structure of the photovoltaic frame; Figure 9 This is a schematic diagram of the process.

[0019] Figure reference numerals: 1. Flux hood; 11. Handle; 12. Extension stage; 121. Large orifice of the hood; 122. Small orifice of the hood; 2. Multistage valve; 21. Connecting platform; 211. Connecting platform housing; 212. Connecting platform internal threaded connector; 22. Pagoda opening; 221. Multistage valve; 222. Tower head; 223. External threaded connector; 23. Connecting pipe; 3. Sandwich plate; 31. Sandwich bottom plate; 311. Large orifice of the sandwich; 322. Small orifice of the sandwich; 32. Black nylon mesh; 4. Inlet pipe; 5. Detection box; 51. Air valve; 52. Honeycomb ventilation grille; 53. Stand; 54. Monitor; 55. 56. Main circuit input connector; 6. Auxiliary circuit input connector; 6. Power supply box; 61. On / off button; 62. Main circuit output connector; 63. Auxiliary circuit output connector; 64. Photovoltaic circuit input connector; 7. Photovoltaic frame; 71. Support front panel; 711. Front panel slide groove; 72. Support back panel; 721. Back panel slide groove; 722. Hexagonal internal thread hole; 723. Photovoltaic circuit output interface; 73. Rotating shaft; 74. Cell array; 75. Adjusting arm; 751. Support rod; 752. Coarse adjustment screw; 753. Fine adjustment screw; 8. Main circuit cable; 9. Auxiliary circuit cable; 10. Photovoltaic circuit cable. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1-4 As shown, the present invention proposes a non-invasive soil gas in-situ detection device, comprising a flux hood 1, a multi-stage valve 2, and a sandwich plate 3. In one embodiment, the flux hood 1 is made of black acrylic material, bottomless and hollow, with an extension platform 12 at the bottom for mounting on the ground to be tested. A sandwich plate 3 is fixedly installed at the bottom of the flux hood 1. The sandwich plate 3 includes a sandwich bottom plate 31 and a black nylon mesh 32 disposed thereon. The black nylon mesh 32 and the black acrylic hood together absorb solar radiation heat to heat the gas inside the hood, forming a heat-driven chimney effect. The detection device also includes the multi-stage valve 2. Among them, the multistage valve 2 is connected to the top side opening of the flow hood 1 to control and guide the outflow of the enriched gas. The output end of the multistage valve 2 is equipped with an air inlet pipe 4, and the output end of the air inlet pipe 4 is equipped with a detection box 5. The detection box 5 has at least one gas detection module built in it for in-situ rapid analysis and detection of the input enriched gas. The top of the detection box 5 is equipped with a power supply box 6, and the top of the power supply box 6 is equipped with a photovoltaic frame 7. Secondly, the multistage valve 2 includes a connecting platform 21, a pagoda-shaped inlet 22, and a connecting pipe 23. The bottom of the connecting platform 21 is connected to the opening on the side of the top of the flow hood 1, and an internal threaded connector 212 is provided inside. The pagoda-shaped inlet 22 has an external threaded connector 223 and a multistage tower head 222, with the external threaded connector 223 connected to the internal threaded connector 212. One end of the connecting pipe 23 is connected to the multistage tower head 222, and the other end is connected to the air inlet pipe 4. The connecting platform 21 is hollow inside, its outer wall forms the connecting platform shell 211, and its inner wall is threaded. 2 is configured to adapt to pipelines with nominal diameters ranging from 3mm to 10mm, and the pagoda port 22 is equipped with a multi-stage valve 221 for controlling the opening and closing of the gas flow path; the connecting holes distributed on the extension platform 12 include large holes 121 and small holes 122 of the cover body, and the interlayer bottom plate 31 is correspondingly provided with interlayer large holes 311 and interlayer small holes 322. The black nylon mesh 32 is fixed by fasteners passing through the small holes 122 of the cover body and the small holes 322 of the interlayer in sequence. The soil gas in-situ detection device is described in detail below: In this embodiment, during field deployment, the assembled flux hood 1 is first placed on the surface of the soil to be tested via its bottom extension platform 12. The flux hood 1 is made of black acrylic material, and its bottom is fixed with a sandwich panel 3, which includes a sandwich base plate 31 and a black nylon mesh 32 laid on it. When sunlight shines on the device, the black hood and the black nylon mesh 32 efficiently absorb solar radiation energy and convert it into heat energy. The heat continuously heats the gas in the enclosed space inside the flux hood 1.

[0022] According to the principles of gas thermodynamics, the density of air decreases upon heating, generating upward thermal buoyancy and thus creating a stable rising airflow within the hood. This process causes a slight decrease in air pressure inside the flux hood 1, forming a continuous, weak negative pressure zone. This negative pressure acts as a driving force, acting on the pores of the soil below, prompting volatile and semi-volatile organic pollutants (SVOCs / VOCs) in the soil to migrate and accumulate directionally from the deeper soil layers with higher concentrations through the soil pores into the low-pressure interior space of the flux hood 1. Based on the "chimney effect" process created by passive solar heating, in-situ, dynamic enrichment of soil gases is achieved without the need for external power consumption.

[0023] The gas enriched at the top of the flux hood 1 enters the multistage valve 2 through openings in its side wall. The connecting platform 21 of the multistage valve 2 communicates with the hood body, and its internal threaded connector 212 precisely matches the external threaded connector 223 of the pagoda opening 22. By operating the multistage valve 221 located on the pagoda opening 22, the start / stop and flow rate of gas sampling can be precisely controlled. The gas then flows out through the tower head 222 and is introduced into the inlet pipe 4 through the matching connecting pipe 23. The tower head 222 of the multistage valve 2 is designed to accommodate different specifications of pipelines with nominal diameters from 3mm to 10mm, enhancing the system's compatibility with different sampling requirements such as flow rate and adsorption tube specifications. The carrying handle 11 facilitates the rapid transfer of the flux hood 1 after sampling to the next detection point.

[0024] like Figure 1 , Figure 5 and Figure 6 As shown, the soil gas in-situ detection device also includes a detection box 5; in one embodiment, the detection box 5 includes an air valve 51, a honeycomb ventilation grid 52, a stand 53, a display 54, a main circuit input connector 55, and a secondary circuit input connector 56; one end of the air valve 51 is connected to the inside of the detection box 5, and the other end is connected to the air inlet pipe 4; the honeycomb ventilation grid 52 is located on both sides of the detection box 5, the stand 53 is a rounded truncated pyramid structure, symmetrically distributed at the four corners of the bottom of the box body, the display 54 is located on the front of the detection box 5, and is connected to the built-in detection module; the main circuit input connector 55 is located on one side of the detection box 5. The main circuit input connector 55 is connected to the main circuit output connector 62 of the power supply box 6 via the main circuit cable 8, and the auxiliary circuit input connector 56 is connected to the auxiliary circuit output connector 63 of the power supply box 6 via the auxiliary circuit cable 9; the gas valve 51 is a check valve, and a handle 11 is fixedly installed at the center of the top of the flux hood 1; the power supply box 6 is electrically connected to the detection box 5, and an on / off button 61 is provided on one side of the box; the photovoltaic frame 7 is connected to the photovoltaic circuit input connector 64 of the power supply box 6 to provide it with photovoltaic power. The following is a detailed description of the soil gas in-situ detection device: In this embodiment, the soil-enriched gas delivered via the air inlet pipe 4 first reaches the gas valve 51 of the detection chamber 5. As a check valve, the gas valve 51 ensures unidirectional gas flow into the detection chamber 5, preventing backflow or cross-contamination during the analysis process. After entering the detection chamber 5, the gas is guided to at least one built-in gas detection module. The module performs rapid and highly sensitive qualitative and quantitative analysis of specific pollutant components in the gas.

[0025] The real-time data generated by the analysis is transmitted to the display 54 located on the front of the detection chamber 5 for intuitive presentation. Operators can read information such as pollutant concentration and type on-site and make immediate data interpretations and adjustments to the investigation strategy. The honeycomb ventilation grilles 52 on both sides of the detection chamber 5 utilize their unique honeycomb structure to provide a larger effective ventilation area per unit area, efficiently achieving air circulation and heat dissipation of electronic components inside the chamber with low resistance, ensuring the stable operation of the detection module in the field environment. The truncated pyramidal structure of the legs 53 provides stable support for the detection chamber 5 and can adapt to uneven ground.

[0026] Furthermore, the stable operation of the testing box 5 relies on a reliable power supply system. Its main circuit input connector 55 is connected to the main circuit output connector 62 of the power supply box 6 via the main circuit cable 8 to obtain the main power supply. At the same time, the auxiliary circuit input connector 56 is connected to the auxiliary circuit output connector 63 of the power supply box 6 via the auxiliary circuit cable 9 to form a backup power supply circuit.

[0027] The power supply box 6 integrates power management functions, and its on / off button 61 controls the switching on and off of the main power supply. The electrical energy generated by the photovoltaic frame 7 is transmitted to the photovoltaic circuit input connector 64 of the power supply box 6 via a circuit. Under normal operating conditions, the system prioritizes using photovoltaic power or the main circuit power. When the main circuit is depleted or fails to supply power, the power management system can automatically or manually switch to the secondary circuit powered by photovoltaic power, thereby ensuring uninterrupted detection and analysis work during long-term field operations and greatly improving the equipment's field adaptability and operational continuity.

[0028] like Figure 1 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the soil gas in-situ detection device also includes a photovoltaic frame 7. In one embodiment, the photovoltaic frame 7 includes a front support plate 71, a back support plate 72, a rotating shaft 73, and an adjusting arm 75. The front support plate 71 is equipped with a solar cell array 74. The front support plate 71 and the back support plate 72 are connected via the rotating shaft 73. The adjusting arm 75 is connected between the front support plate 71 and the back support plate 72 to adjust the tilt angle of the front support plate 71. The front support plate 71 has a solar cell array 74 mounted on its front side, and front plate grooves 711 on both sides of its back side. The back support plate 72 has back plate grooves 721 of the same specification on both sides of its front side, a hexagonal internal threaded hole 722 in the center of its front side, and a photovoltaic circuit output interface 723 on its side, which is connected to the photovoltaic circuit input connector 64 via a photovoltaic circuit cable 10. The front support plate 71 and the back support plate structure are connected via the rotating shaft 73. The adjusting arm 75 includes a support rod 751, a coarse adjusting screw 752, and a fine adjusting screw 753, which are mounted on the support rod 751. The tilt angle adjustment range of the photovoltaic frame 7 is 0° to 65°. The soil gas in-situ detection device is described in detail below: In this embodiment, the core functional component of the photovoltaic frame 7 is the solar cell array 74 mounted on the front of the supporting front plate 71, which is responsible for converting solar energy into electrical energy. To maximize the solar irradiance collection efficiency, the photovoltaic frame 7 is designed with an adjustable tilt angle structure. The supporting front plate 71 and the supporting back plate 72 are hinged together by a pivot 73. The adjusting arm 75 is the actuator for tilt angle adjustment, and its support rod 751 has its two ends embedded in the front plate groove 711 on the back of the supporting front plate 71 and the back plate groove 721 on the front of the supporting back plate 72, respectively.

[0029] During adjustment, the tilt angle is quickly and widely positioned by rotating the coarse adjustment screw 752 located in the middle of the support rod 751, followed by precise fine-tuning using the fine adjustment screw 753. This allows the tilt angle of the cell array 74 to be stably fixed at any position between 0° and 65°. Depending on the latitude of different regions, the tilt angle can be adjusted to the optimal receiving angle range to significantly improve photovoltaic power generation efficiency. The hexagonal internal threaded hole 722 in the middle of the support backplate 72 is used for a secure connection with the power supply box 6.

[0030] The direct current generated by the solar cell array 74 is collected through internal wiring to the photovoltaic circuit output interface 723 on the side of the supporting backplate 72. The electrical energy is transmitted via the photovoltaic circuit cable 10 to the photovoltaic circuit input connector 64 of the power supply box 6 and incorporated into the power supply network of the entire device.

[0031] This photovoltaic power, serving as a priority or supplementary energy source, together with the main and backup battery systems connected to the main circuit cable 8 and the auxiliary circuit cable 9, forms a composite power supply architecture. This not only ensures long-term operation in outdoor locations without mains power, achieving low-carbon operation, but its flexible tilt adjustment and storage design also improves the equipment's portability and effectively protects the fragile solar cell array 74 during transportation and storage.

[0032] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A non-invasive in-situ soil gas detection device, comprising a flux hood (1), characterized in that: The flux hood (1) is made of black acrylic material, has no bottom and is hollow, and has an extension platform (12) at the bottom for attaching to the ground to be measured. The bottom of the flux hood (1) is fixedly provided with a sandwich panel (3). The sandwich panel (3) includes a sandwich bottom plate (31) and a black nylon mesh (32) disposed thereon. The black nylon mesh (32) and the black acrylic cover together absorb solar radiation heat energy to heat the gas inside the cover, forming a heat-driven chimney effect. The detection device also includes a multi-stage valve (2). The multistage valve (2) is connected to the top side opening of the flow hood (1) to control and guide the outflow of enriched gas. An air inlet pipe (4) is installed at the output end of the multistage valve (2), and a detection box (5) is installed at the output end of the air inlet pipe (4). The detection box (5) has at least one gas detection module built in it for in-situ rapid analysis and detection of the input enriched gas. A power supply box (6) is installed on the top of the detection box (5), and a photovoltaic frame (7) is installed on the top of the power supply box (6). The multistage valve (2) includes a connecting platform (21), a pagoda-shaped inlet (22), and a connecting pipe (23); the bottom of the connecting platform (21) is connected to the opening on the top side of the flow hood (1), and an internal threaded connector (212) is provided inside the connecting platform; the pagoda-shaped inlet (22) has an external threaded connector (223) and a multistage tower head (222), and the external threaded connector (223) is connected to the internal threaded connector (212) of the connecting platform; one end of the connecting pipe (23) is connected to the multistage tower head (222), and the other end is connected to the air inlet pipe (4).

2. The non-invasive in-situ soil gas detection device according to claim 1, characterized in that, The connecting platform (21) is hollow inside, and its outer wall forms the connecting platform shell (211). The inner wall is threaded. The multi-stage valve (2) is configured to adapt to pipelines with a nominal diameter in the range of 3mm to 10mm. The pagoda opening (22) is provided with a multi-stage valve (221) for controlling the opening and closing of the gas flow path.

3. The non-invasive in-situ soil gas detection device according to claim 1, characterized in that, The testing box (5) includes an air valve (51), a honeycomb ventilation grille (52), a stand (53), a display (54), a main circuit input connector (55), and a secondary circuit input connector (56). One end of the air valve (51) is connected to the inside of the test box (5), and the other end is connected to the air inlet pipe (4); the honeycomb ventilation grille (52) is located on both sides of the test box (5); the stand (53) is a round truncated pyramid structure, symmetrically distributed at the four corners of the bottom of the box body; the display (54) is located on the front of the test box (5) and connected to the built-in test module; the main circuit input connector (55) is located on one side of the test box (5).

4. A non-invasive in-situ soil gas detection device according to claim 3, characterized in that, The main circuit input connector (55) is connected to the main circuit output connector (62) of the power supply box (6) via the main circuit cable (8), and the secondary circuit input connector (56) is connected to the secondary circuit output connector (63) of the power supply box (6) via the secondary circuit cable (9).

5. A non-invasive in-situ soil gas detection device according to claim 4, characterized in that, The air valve (51) is a check valve, and a handle (11) is fixedly installed at the center of the top of the flow hood (1).

6. A non-invasive in-situ soil gas detection device according to claim 3, characterized in that, The power supply box (6) is electrically connected to the detection box (5), and an on / off button (61) is provided on one side. The photovoltaic frame (7) is connected to the photovoltaic circuit input connector (64) of the power supply box (6) to provide photovoltaic power to it.

7. A non-invasive in-situ soil gas detection device according to claim 1, characterized in that, The photovoltaic frame (7) includes a front support plate (71), a back support plate (72), a rotating shaft (73), and an adjusting arm (75). The front support plate (71) is equipped with a battery cell array (74); the front support plate (71) and the back support plate (72) are connected by the pivot (73); the adjusting arm (75) is connected between the front support plate (71) and the back support plate (72) to adjust the tilt angle of the front support plate (71). The front support plate (71) is equipped with a battery cell array (74) on the front and has front plate grooves (711) on both sides of the back. The back support plate (72) has back plate grooves (721) of the same specification on both sides of the front. The front has a hexagonal internal thread hole (722) in the middle and a photovoltaic circuit output interface (723) on the side, which is connected to the photovoltaic circuit input connector (64) through a photovoltaic circuit cable (10). The front support plate (71) and the back support plate structure are connected by the pivot (73).

8. A non-invasive in-situ soil gas detection device according to claim 7, characterized in that, The adjusting arm (75) includes a support rod (751), a coarse adjusting screw (752) and a fine adjusting screw (753), the coarse adjusting screw (752) and the fine adjusting screw (753) being disposed on the support rod (751).

9. A non-invasive in-situ soil gas detection device according to claim 6, characterized in that, The tilt angle adjustment range of the photovoltaic frame (7) is 0° to 65°.

10. A non-invasive in-situ soil gas detection device according to claim 1, characterized in that, The connecting holes distributed on the extension stage (12) include large holes (121) and small holes (122) of the cover body. The sandwich base plate (31) is provided with corresponding large holes (311) and small holes (322) of the sandwich layer. The black nylon mesh (32) is fixed by fasteners passing through the small holes (122) of the cover body and the small holes (322) of the sandwich layer in sequence.

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