Ultraviolet fluorescence testing device and method for continuous detection of organic pollutants in soil

Abstract

The application provides a fluorescence testing device and testing method for continuous detection of organic pollutants in soil. A hydraulic transmission device is used to push multiple connectable straight push probes into the soil. A built-in ultraviolet light source of a specific wavelength is used to induce the organic pollutants in the soil to generate fluorescence. A miniature camera is used to collect and record the fluorescence image. An automatic cleaning module is used to continuously clean the sapphire glass window in contact with the soil on the straight push probe, preventing test errors caused by organic pollutants staining the glass during continuous detection. Image analysis software can be used to analyze the concentration and distribution of organic pollutants during continuous detection. The device and method provided by the application achieve layered continuous detection of organic pollutants in soil, overcoming the high cost and long operation period of single-point measurement or profile measurement, reducing the test error caused by organic matter staining the sapphire glass window, and significantly improving the convenience and test accuracy of organic pollutant detection in soil.

Description

Technical Field

[0001] This invention belongs to the field of environmental geotechnical engineering technology, and specifically relates to an ultraviolet fluorescence testing device and method for continuous detection of organic pollutants in soil, which is applicable to the determination of the distribution and concentration of organic pollutants in soil. Background Technology

[0002] Non-aqueous organic pollutants are easily adsorbed by soil particles and remain in the soil for extended periods. Furthermore, the heterogeneous and fragmented nature of soil makes the distribution and concentration detection of organic pollutants in soil a significant challenge. Detecting the distribution and concentration of organic pollutants in soil is a crucial aspect of organic pollution site monitoring. Currently, sensor-based measurement methods are the primary approach for measuring organic pollutants in both indoor and field measurements. While sensor-based methods can measure soil parameters in the vicinity of the sensor location, they are typically single-point measurements, resulting in high costs for cross-sectional measurements. Moreover, these invasive methods require repeated installation and retrieval of sensors and transmission lines during multi-point measurements, which can significantly disturb the undisturbed soil and lead to substantial measurement errors. These conventional measurement techniques cannot adequately meet the needs for large-area, multi-section measurements with minimal soil disturbance. Therefore, layered continuous ultraviolet fluorescent labeling devices offer a new approach for measuring the presence and concentration distribution of organic pollutants in soil. Summary of the Invention

[0003] The present invention provides an ultraviolet fluorescence testing device and method for continuous detection of organic pollutants in soil, which at least solves the above-mentioned technical problems;

[0004] This invention provides an ultraviolet fluorescence testing device and method for continuous detection of organic pollutants in soil. A hydraulic transmission device propels multiple connectable push-type probes into the soil. Ultraviolet lamps of specific wavelengths are irradiated through sapphire glass windows, inducing fluorescence in the organic pollutants. A miniature camera captures and records the fluorescence images, and filters are applied to separate the fluorescence emitted by non-aqueous organic pollutants. An automatic cleaning module continuously cleans the sapphire glass windows of the push-type probes that are in contact with the soil, preventing organic pollutants from adhering to the glass. This allows for layered and continuous detection, obtaining fluorescence images at different times and spaces, as well as in-situ images of the soil under visible light irradiation. Image analysis software can process information such as the percentage of fluorescent area and the distribution of fluorescent dots, providing reasonable semi-quantitative indicators for the presence and concentration distribution of organic pollutants in contaminated soil.

[0005] An ultraviolet fluorescence testing device for continuous detection of organic pollutants in soil is proposed. The device includes: a rigid shell module, an ultraviolet fluorescence labeling module, an automatic cleaning module, a data acquisition and image analysis system, and a hydraulic transmission system. The rigid shell module consists of a probe metal shell, a connector, and a tapered joint. The probe metal shell can be screwed into the connector and tapered joint by threads.

[0006] The probe's metal housing is cylindrical, with mounting positions for an ultraviolet fluorescent marking module and an automatic cleaning module inside. The open end of the metal housing has external threads and a positioning latch. A rectangular window is located on the side of the metal housing, and the metal housing around the rectangular window gradually thickens outwards from the window edge to a constant thickness, ensuring a smooth curved surface connection with the sapphire glass window during operation. The top and bottom edges of the rectangular window are tightly fitted to the sapphire glass window. Two continuous rubber strips, parallel to the long side of the rectangular window, are located on the outer sides of each of the left and right edges, adhering closely to the sapphire glass window. The connector is a hollow cylinder with internal threads and positioning latches at both ends. Four continuous rubber strips are located inside the connector. When the positioning latches on the probe's metal housing align with the positioning latches on the connector, the four continuous rubber strips of the connector and the four continuous rubber strips of the probe's metal housing are aligned and in close contact. When the sapphire glass window is flush against the same side of the rectangular window... The two long rubber strips will enclose a sealed space; the conical joint is a hollow cone with an internal thread at the open end and a cone tip at the other end; the ultraviolet fluorescent marking module consists of multiple sets of ultraviolet (UV) LEDs, visible light LEDs, a miniature camera, a sapphire glass window, and a light guide channel; the ultraviolet (UV) LEDs can emit ultraviolet light of three wavelengths: 254 / 275 / 308nm, with a total radiant flux of 3mw; the visible light LEDs can emit pure white light for soil illumination; the miniature camera has an image acquisition frame rate of 20-120 frames per second and a spectral response wavelength range covering 380nm-3000nm; the sapphire glass window is a synthetic curved sapphire sheet with a light transmission wavelength covering 150nm-5500nm; the light guide channel (25) is a "claw"-shaped component with interconnected internal structures welded from thin-walled metal tubes, with the included angle between the axes of the three tubes being 30°, to ensure that there is no light pollution inside the observation window and the light guide channel;

[0007] The automatic cleaning module consists of a motor, gears, a fixing rod, and a cleaning chamber. The motor is a miniature DC motor with a voltage between 1-24V, used to drive the main shaft gear to rotate bidirectionally. The gears include a main shaft gear and a driven shaft gear. The fixing rod is a metal rod that connects the driven shaft and the sapphire glass window into a rigid whole. When the motor is working, the gears can drive the driven shaft to rotate bidirectionally, thereby driving the fixing rod and the sapphire glass window to sweep left and right. The cleaning chamber is enclosed by a probe metal shell, two long rubber strips located on the same side of the rectangular window, and the sapphire glass window. A water filling pipe and a water suction pipe are provided on the probe metal shell to realize the circulation of cleaning fluid in the cleaning chamber.

[0008] The data acquisition and image analysis system can record and store visible light irradiated images and ultraviolet fluorescent labeled images at certain time intervals. It can filter fluorescent points from the images through image acquisition and processing software, calculate the percentage data of fluorescent area on the images, and generate a three-dimensional cloud map.

[0009] The hydraulic transmission system is a small hydraulic press that generates thrust to push the transmission rod and the direct-push probe forward at a speed of 10-30 mm per second. The transmission rod is a hollow round tube, the bottom of which can be screwed to the metal shell of the probe by threads. The internal space can accommodate a water filling pipe, a water pumping pipe, and lines for electrical conduction and data transmission.

[0010] The ultraviolet fluorescent labeling module and the automatic cleaning module are connected to the rigid housing module through the mounting positions of the ultraviolet fluorescent labeling module and the automatic cleaning module on the rigid housing module to form a direct-push probe. The direct-push probe is connected to the hydraulic transmission system through the transmission rod, and the direct-push probe is connected to the data acquisition and image analysis system through the transmission line, thus forming an ultraviolet fluorescence testing device for continuous detection of organic pollutants in soil.

[0011] A method for implementing a stratified continuous detection ultraviolet fluorescence testing device for organic pollutants in soil is proposed, which includes the following steps:

[0012] 1) Assemble an ultraviolet fluorescence testing device for continuous detection of organic pollutants in soil;

[0013] 2) Using the hydraulic transmission system, push the direct-push probe into the formation. When the center of the sapphire glass window coincides with the horizon, turn on the data acquisition and image analysis system and define this point as the origin of the coordinates. After defining, continue pushing downwards until the sapphire glass window is completely below the horizon. Stop when the imaging effect is calibrated. Turn on the visible light LED to illuminate the soil. Observe the imaging effect of the miniature camera through the image acquisition and processing software and adjust the focus to the best observation effect (focus adjustment is only required for the first use). After the focus is adjusted, turn off the visible light LED and check whether a dark background has been achieved (no light pollution inside the window or light guide channel) through the image acquisition and processing software. Only when there are no fluorescent points in the window of the image acquisition and processing software can the next step be performed.

[0014] 3) Set the image size, pixels, and recording interval in the image acquisition and processing software, then continue to push the direct-push probe downwards at a speed of 0-30mm / s and start the detection;

[0015] 4) After reaching the target detection depth, stop the detection, pull out the direct-push probe through the hydraulic transmission system and clean it, and then start the detection of the next measurement point;

[0016] 5) Repeat steps 2-3 to detect all test points. Then, use image acquisition and processing software to filter out fluorescent points from the images, calculate the percentage of fluorescent area on each image, and establish a three-dimensional spatial coordinate system with the ground position of the starting test point as the origin. Then, represent the depth and horizontal orientation of each test point with coordinates. By matching the percentage of fluorescent area in each image with the three-dimensional coordinates of the test point, a three-dimensional cloud field of the concentration of organic pollutants in the soil is formed.

[0017] Beneficial effects:

[0018] The advantages of this invention are that it provides an apparatus and method for the stratified and continuous detection of organic pollutants in soil using ultraviolet fluorescence labeling, overcoming the limitations of traditional sensor measurement methods for analyzing organic pollutant concentrations. It also minimizes disturbance to undisturbed soil, resulting in more accurate measurement results. Furthermore, it overcomes the high cost of single-point and profile measurements. Each probe section incorporates multiple ultraviolet fluorescence labeling modules, and multiple probe sections can be connected via connectors of varying lengths, enabling simultaneous, stratified, and continuous multi-depth image acquisition. An automatic cleaning module ensures timely and effective removal of oil adsorbed on the sapphire glass window during continuous probe advancement, effectively avoiding significant errors in estimating the concentration and spatial distribution of organic pollutants in soil, and significantly improving the convenience and accuracy of organic pollutant detection in soil. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the working operation of a fluorescence testing device for continuous stratified detection of organic pollutants in soil according to the present invention.

[0021] Figure 2 This is a longitudinal cross-sectional view of the direct-push probe of a fluorescence testing device for continuous stratified detection of organic pollutants in soil according to the present invention.

[0022] Figure 3 A cross-section of the direct-push probe of a fluorescence testing device for continuous stratified detection of organic pollutants in soil according to the present invention. Figure 1 ;

[0023] Figure 4 A cross-section of the direct-push probe of a fluorescence testing device for continuous stratified detection of organic pollutants in soil according to the present invention. Figure 2 ;

[0024] Figure 5 This is a front view of the direct-push probe of a fluorescence testing device for continuous stratified detection of organic pollutants in soil according to the present invention.

[0025] Figure 6 This is a top view of the direct-push probe of a fluorescence testing device for continuous stratified detection of organic pollutants in soil according to the present invention.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Rigid shell module;

[0028] 11. Probe metal housing;

[0029] 111. External thread;

[0030] 112. Positioning checkpoint;

[0031] 113. Rubber strip;

[0032] 12. Connectors;

[0033] 13. Tapered joint;

[0034] 121. Internal thread;

[0035] 2. Ultraviolet fluorescent labeling module;

[0036] 21. Ultraviolet (UV) LED lamp;

[0037] 22. Visible light LED lamp;

[0038] 23. Miniature camera;

[0039] 24. Sapphire glass window;

[0040] 25. Light guide channel;

[0041] 3. Automatic cleaning module;

[0042] 31. Electric motor;

[0043] 32. Gear;

[0044] 321. Main shaft gear;

[0045] 322. Driven shaft;

[0046] 33. Fixing rod;

[0047] 34. Cleaning chamber;

[0048] 341. Water filling pipe;

[0049] 342. Water pump pipe;

[0050] 4. Data acquisition and image analysis system;

[0051] 5. Hydraulic transmission system;

[0052] 51. Transmission rod. Detailed Implementation

[0053] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0054] Furthermore, in the embodiments of this specification, when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in the embodiments of this specification are for illustrative purposes only and are not intended to limit the invention.

[0055] like Figure 1-6As shown, an ultraviolet fluorescence testing device for continuous detection of organic pollutants in soil includes: a rigid shell module 1, an ultraviolet fluorescence labeling module 2, an automatic cleaning module 3, a data acquisition and image analysis system 4, and a hydraulic transmission system 5.

[0056] The rigid housing module 1 consists of a probe metal housing 11, a connector 12, and a tapered connector 13. The probe metal housing 11 can be screwed together with the connector 12 and the tapered connector 13 by threads.

[0057] The probe's metal housing 11 is cylindrical, with mounting positions for the ultraviolet fluorescent marking module 2 and the automatic cleaning module 3 inside. The open end of the probe's metal housing 11 is provided with external threads 111 and positioning bayonet 112. A rectangular window is opened on the side of the probe's metal housing 11, and the probe's metal housing 11 around the rectangular window gradually thickens from the edge of the rectangular window outward to a constant thickness to ensure a smooth curved surface connection with the sapphire glass window 24 during operation. The probe's metal housing 11 at the top and bottom edges of the rectangular window is tightly fitted to the sapphire glass window 24. Two continuous rubber strips 113 parallel to the long side of the rectangular window are provided on the outer sides of the left and right edges of the rectangular window, and the rubber strips 113 are tightly fitted to the sapphire glass window 24.

[0058] The connector 12 is a hollow cylinder with internal threads 121 and positioning slots 112 inside the openings at both ends. Four continuous rubber strips 113 are installed inside the connector 12. When the positioning slots 112 on the probe's metal housing 11 are aligned with the positioning slots 112 on the connector 12, the four continuous rubber strips 113 of the connector 12 and the four continuous rubber strips 113 of the probe's metal housing 11 are aligned in a straight line and in close contact. When the sapphire glass window 24 is pressed against the two continuous rubber strips 113 on the same side of the rectangular window, a sealed space is formed. The conical connector 13 is a hollow cone with internal threads 121 at the open end and a cone tip at the other end.

[0059] The ultraviolet fluorescent labeling module 2 consists of multiple sets of ultraviolet (UV) LED lamps 21, visible light LED lamps 22, a miniature camera 23, a sapphire glass window 24, and a light guide channel 25. The ultraviolet (UV) LED lamps 21 emit ultraviolet light of three wavelengths: 254 / 275 / 308nm, with a total radiant flux of 3mW. The visible light LED lamps 22 emit pure white light for soil illumination. The miniature camera 23 has an image acquisition frame rate of 20-120 frames per second and a spectral response wavelength range covering 380nm-3000nm. The sapphire glass window 24 is a synthetic curved sapphire sheet with a light transmission wavelength range covering 150nm-5500nm. The light guide channel 25 is a claw-shaped component with interconnected internal structures formed by welding thin-walled metal tubes. The included angle between the axes of the three tubes is 30° to ensure no light pollution inside the observation window and the light guide channel.

[0060] The automatic cleaning module 3 consists of a motor 31, a gear 32, a fixing rod 33, and a cleaning chamber 34. The motor 31 is a micro DC motor with a voltage between 1-24V, used to drive the main shaft gear 321 to rotate bidirectionally. The gear 32 includes the main shaft gear 321 and the driven shaft gear. The fixing rod 33 is a metal rod that connects the driven shaft 322 and the sapphire glass window 24 into a rigid whole. When the motor 31 is working, the gear 32 can drive the driven shaft 322 to rotate bidirectionally, thereby driving the fixing rod 33 and the sapphire glass window 24 to sweep left and right. The cleaning chamber 34 is formed by the probe metal shell 11, two long rubber strips 113 located on the same side of the rectangular window, and the sapphire glass window 24. A water filling pipe 341 and a water suction pipe 342 are provided on the probe metal shell 11 to realize the circulation of cleaning fluid in the cleaning chamber 34.

[0061] The data acquisition and image analysis system 4 can record and store visible light irradiated images and ultraviolet fluorescent labeled images at certain time intervals. It can filter fluorescent points from the images through image acquisition and processing software, calculate the percentage data of fluorescent area on the images, and generate a three-dimensional cloud map.

[0062] The hydraulic transmission system 5 is a small hydraulic press, which generates thrust to push the transmission rod 51 and the direct-push probe forward at a speed of 10-30 mm per second; the transmission rod 51 is a hollow round tube, the bottom of which can be screwed to the metal shell 11 of the probe by threads, and the internal space can pass through the water filling pipe 341, the water pumping pipe 342 and the lines used for electrical conduction and data transmission.

[0063] The ultraviolet fluorescent labeling module 2 and the automatic cleaning module 3 are connected to the rigid housing module 1 through the mounting positions of the ultraviolet fluorescent labeling module 2 and the automatic cleaning module 3 on the rigid housing module 1 to form a direct-push probe. The direct-push probe is connected to the hydraulic transmission system 5 through the transmission rod 51, and the direct-push probe is connected to the data acquisition and image analysis system 4 through the transmission line, thus forming an ultraviolet fluorescent testing device for continuous detection of organic pollutants in soil.

[0064] A method for implementing a stratified and continuous ultraviolet fluorescence testing device for organic pollutants in soil, comprising the following steps:

[0065] 1. An ultraviolet fluorescence testing device for continuous stratified detection of organic pollutants in soil;

[0066] 2. Using the hydraulic transmission system 5, push the direct-push probe into the stratum. When the center height of the sapphire glass window 24 coincides with the horizon, turn on the data acquisition and image analysis system 4 and define this point as the origin of the coordinates. After the definition is completed, continue to push downwards until the sapphire glass window 24 is completely below the horizon. Then stop and perform imaging effect calibration. Turn on the visible light LED light 22 to illuminate the soil. Observe the imaging effect of the miniature camera 23 through the image acquisition and processing software and adjust the focus to the best observation effect. Focus adjustment is only required for the first use. After the focus adjustment is completed, turn off the visible light LED light 22 and check whether the dark background window or the light guide channel is free of light pollution through the image acquisition and processing software. Only when there are no fluorescent points in the window of the image acquisition and processing software can the next step be carried out.

[0067] 3. Set the image size, pixels, and recording interval in the image acquisition and processing software, then continue to push the direct-push probe downwards at a speed of 0-30mm / s and begin detection;

[0068] 4. After reaching the target detection depth, stop the detection, pull out the direct-push probe through the hydraulic transmission system 5 and clean it, and then start the detection of the next measurement point;

[0069] 5. After repeating steps 2-3 to detect all test points, filter out fluorescent points from the images using image acquisition and processing software. Then, calculate the percentage of fluorescent area on each image. Establish a three-dimensional spatial coordinate system with the starting test point's ground position as the origin. Represent the depth and horizontal orientation of each test point using coordinates. By matching the percentage of fluorescent area in each image with the three-dimensional coordinates of the test point, a three-dimensional cloud field representing the concentration of organic pollutants in the soil is formed. Finally, it should be noted that the above examples are merely specific embodiments of the present invention, used to illustrate the technical solution of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention. All should be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

[0070] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. An ultraviolet fluorescence testing device for continuous detection of organic pollutants in soil, characterized in that, The device includes: a rigid shell module (1), an ultraviolet fluorescent marking module (2), an automatic cleaning module (3), a data acquisition and image analysis system (4), and a hydraulic transmission system (5). The rigid housing module (1) consists of a probe metal housing (11), a connector (12) and a tapered connector (13). The probe metal housing (11) is screwed together with the connector (12) and the tapered connector (13) by threads. The probe metal housing (11) is cylindrical, and the interior is provided with mounting positions for the ultraviolet fluorescent marking module (2) and the automatic cleaning module (3). The open end of the probe metal housing (11) is provided with external threads (111) and positioning bayonet (112). The side of the probe metal housing (11) has a rectangular window, and the probe metal housing (11) around the rectangular window gradually thickens from the edge of the rectangular window to a constant thickness to ensure that it is connected to the sapphire glass window (24) in a smooth curved surface during operation. The probe metal housing (11) at the upper and lower edges of the rectangular window is tightly fitted to the sapphire glass window (24). Two long rubber strips (113) parallel to the long side of the rectangular window are provided on the outer side of the left and right edges of the rectangular window. The rubber strips (113) are tightly fitted to the sapphire glass window (24). The connector (12) is a hollow cylinder with internal threads (121) and positioning slots (112) inside the openings at both ends. Four continuous rubber strips (113) are provided inside the connector (12). When the positioning slots (112) on the metal shell of the probe (11) are aligned with the positioning slots (112) on the connector (12), the four continuous rubber strips (113) of the connector (12) and the four continuous rubber strips (113) of the metal shell of the probe (11) are respectively in the same straight line and in close contact. When the sapphire glass window (24) is close to the two continuous rubber strips (113) on the same side of the rectangular window, a sealed space will be formed. The tapered connector (13) is a hollow cone with an internal thread (121) at the open end and a cone tip at the other end; The ultraviolet fluorescent labeling module (2) consists of a visible light LED lamp (22), a miniature camera (23), a sapphire glass window (24), a light guide channel (25), and multiple sets of ultraviolet (UV) LED lamps (21). The ultraviolet (UV) LED lamp (21) emits ultraviolet light of three wavelengths: 254nm, 275nm, or 308nm, with a total radiant flux of 3mW. The visible light LED lamp (22) emits pure white light for soil illumination. The miniature camera (23) has an image acquisition frame rate of 20-120 frames per second and a spectral response wavelength range covering 380nm-3000nm. The sapphire glass window (24) is a synthetic curved sapphire sheet with a light transmission wavelength range covering 150nm-5500nm. The light guide channel (25) is a "claw"-shaped component with interconnected internal structures, welded from thin-walled metal tubes. The included angle between the axes of the three tubes is 30°, which is used to ensure that there is no light pollution in the observation window and inside the light guide channel. The automatic cleaning module (3) consists of a motor (31), a gear (32), a fixing rod (33), and a cleaning chamber (34). The motor (31) is a miniature DC motor with a voltage between 1V and 24V, used to drive the main shaft gear (321) to rotate bidirectionally. The gear (32) includes the main shaft gear (321) and the driven shaft gear. The fixing rod (33) is a metal rod that connects the driven shaft (322) of the driven shaft gear to the sapphire glass window (24) to form a rigid connection. When the motor (31) is working, the gear (32) drives the driven shaft (322) to rotate in both directions, thereby driving the fixed rod (33) and the sapphire glass window (24) to sweep left and right; the cleaning chamber (34) is formed by the probe metal shell (11), two long rubber strips (113) located on the same side of the rectangular window, and the sapphire glass window (24). A water filling pipe (341) and a water suction pipe (342) are provided on the probe metal shell (11) to realize the circulation of cleaning fluid in the cleaning chamber; The data acquisition and image analysis system (4) records and stores visible light irradiated images and ultraviolet fluorescent labeled images at certain time intervals, filters out fluorescent points from the images through image acquisition and processing software, calculates the percentage data of fluorescent area on the images, and generates a three-dimensional cloud map. The hydraulic transmission system (5) is a small hydraulic press, which generates thrust to push the transmission rod (51) and the direct-push probe at a speed of 10mm-30mm per second; the transmission rod (51) is a hollow round tube, the bottom of which is screwed to the metal shell (11) of the probe by threads, and the internal space passes through the water filling pipe (341), the water pumping pipe (342) and the lines for conducting electricity and data transmission. The ultraviolet fluorescent labeling module (2) and the automatic cleaning module (3) are connected to the rigid shell module (1) through the mounting positions of the ultraviolet fluorescent labeling module (2) and the automatic cleaning module (3) set on the rigid shell module (1) to form a direct-push probe. The direct-push probe is connected to the hydraulic transmission system (5) through the transmission rod (51). The direct-push probe is connected to the data acquisition and image analysis system (4) through the transmission line to form an ultraviolet fluorescent testing device for continuous detection of organic pollutants in soil.

2. A method for continuous detection of organic pollutants in soil using ultraviolet fluorescence testing, the method comprising the ultraviolet fluorescence testing device for continuous detection of organic pollutants in soil according to claim 1, the method comprising the following steps: 1) Assemble the ultraviolet fluorescence testing device for continuous detection of organic pollutants in soil as described in claim 1; 2) Using the hydraulic transmission system (5), push the direct-push probe into the stratum. When the center height of the sapphire glass window (24) coincides with the horizon, turn on the data acquisition and image analysis system (4) and define this point as the origin of the coordinates. After the definition is completed, continue to push downwards until the sapphire glass window (24) is completely below the horizon. Then stop and perform imaging effect calibration. Turn on the visible light LED lamp (22) to illuminate the soil. Observe the imaging effect of the miniature camera (23) through the image acquisition and processing software and adjust the focal length to the best observation effect. After the focal length is adjusted, turn off the visible light LED lamp (22) and check whether the dark background is achieved through the image acquisition and processing software. Only proceed to the next step when there are no fluorescent points in the window of the image acquisition and processing software. 3) Set the image size, pixels, and recording interval in the image acquisition and processing software, then continue to push the direct-push probe downwards at a speed of 0mm / s-30mm / s and start the detection; 4) After reaching the target detection depth, stop the detection, pull out the direct-push probe and clean it through the hydraulic transmission system (5), and then start the detection of the next measurement point; 5) Repeat steps 2)-3) to detect all test points. Then, filter out the fluorescent points from the images using image acquisition and processing software. Calculate the percentage of fluorescent area on each image and establish a three-dimensional spatial coordinate system with the starting test point as the origin. Then, represent the depth and horizontal orientation of each test point with coordinates. By matching the percentage of fluorescent area in each image with the three-dimensional coordinates of the test point, a three-dimensional cloud field of the concentration of organic pollutants in the soil is formed.

Images