An environmental moisture detector for cultivated land in rocky desertification areas

Abstract

The application discloses an environmental moisture detector for cultivated land in a rocky desertification area, relates to the technical field of environmental detection, and comprises a stand column and spiral blades arranged around the outer portion of the stand column, wherein the spiral blades are fixedly connected with the stand column; the environmental moisture detector further comprises a plurality of water moisture detection needles arranged in a longitudinal direction on one side of the stand column, double-layer pipelines arranged at the ends of the water moisture detection needles and used for pushing the water moisture detection needles to extend and distribute in a stepped manner outward and automatically rotating and moving to avoid obstacles, and a driving mechanism arranged on the double-layer pipelines and used for driving the double-layer pipelines to horizontally move; the water moisture detection needles are pushed by the double-layer pipelines to extend and distribute in a stepped manner outward; according to the growth characteristics of plant root systems, i.e. the growth from near to far and from shallow to deep, adaptability is realized, and the adaptability and pertinence of detection are improved; the spiral hooks are used for connecting the water moisture detection needles with the double-layer pipelines, automatic rotation is realized to avoid obstacles, the complex geological environment is adapted, and the overall detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of environmental monitoring technology, specifically to an environmental moisture detector for cultivated land in rocky desertification areas. Background Technology

[0002] Due to the high gravel content, poor water retention, and severe soil erosion in rocky desertification areas, it is necessary to conduct soil moisture testing when planting different plants on cultivated land in these areas. This is to obtain comprehensive and accurate soil moisture data at different depths. Different plants have different soil moisture requirements. When insufficient soil moisture is detected, drip irrigation systems need to be activated to increase the moisture content. Precise moisture testing can improve vegetation survival rates and promote ecological restoration.

[0003] Traditional moisture testing either measures the moisture in the soil or the moisture in the air, and it is mostly done at fixed points. However, when different plants are planted on farmland, their root growth and water absorption are different. Fixed-point testing can easily lead to inaccurate data. For example, compared to herbaceous plants, which have shallower root systems, it is only necessary to test the moisture in the upper soil layer. However, for tree-type cash crops with well-developed and deep root systems, testing the moisture in the upper soil layer alone cannot serve as a reliable reference. Currently, traditional moisture detectors typically insert probes directly into the soil and collect data from different layers by adjusting the insertion depth. However, since plant roots are not always vertically distributed, the detection values ​​obtained by the traditional vertical insertion method cannot accurately reflect the moisture status near the plant roots, resulting in discrepancies between the collected results and the actual situation. In addition, the soil in rocky desertification areas often contains hard obstructions such as gravel and rocks. If the probe encounters gravel or rocks during insertion, it is easy to get stuck. During the adjustment process, the probe must be completely pulled out, which reduces the efficiency of data collection.

[0004] To address the aforementioned problems, this invention proposes a stepped, outwardly extending probe that can adapt to the natural distribution of plant roots and automatically avoid obstacles, thereby preventing jamming and improving the accuracy and efficiency of data collection. Summary of the Invention

[0005] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the present invention aims to provide an environmental moisture detector for farmland in rocky desertification areas, thereby solving the problem mentioned in the background technology that the soil moisture content near plant roots cannot be accurately collected during the detection process, resulting in inaccurate detection values.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an environmental moisture detector for farmland in rocky desertification areas, comprising a column and spiral blades surrounding the column, wherein the spiral blades are fixedly connected to the column, and further comprising a plurality of longitudinally arranged moisture detection needles disposed on one side of the column, and a double-layer pipe installed at the end of the moisture detection needles for pushing the moisture detection needles to extend outward in a stepped manner and being able to automatically rotate and move to avoid obstacles, and a drive mechanism disposed on the double-layer pipe for driving the double-layer pipe to move horizontally. A display electrically connected to a moisture detection needle is installed near the top of the column.

[0007] Preferably, the double-layer pipe includes an outer pipe that penetrates the column, an inner pipe that is sleeved inside the outer pipe, and an extension pipe that is fixedly connected to the end of the outer pipe. A limiting pipe is inserted into the side of the column corresponding to the position of the outer pipe, and the outer pipe and the limiting pipe are connected by a sliding connection.

[0008] Preferably, there are several double-layer pipes, and each double-layer pipe is connected to a corresponding moisture detection needle, and the length of the double-layer pipes gradually decreases from top to bottom.

[0009] Preferably, each of the outer pipes has a spiral groove on its surface, and the pitch of the spiral groove gradually decreases from top to bottom.

[0010] Preferably, the driving mechanism includes a worm gear, and a worm wheel is engaged on one side of the worm gear corresponding to the position of the double-layer pipe. The worm wheel is sleeved on the outside of the outer pipe, and a first lever with a through spiral groove is welded to the inner wall of the worm wheel. The worm wheel and the column are connected by a bearing to form a rotatable connection.

[0011] Preferably, a limit rod is welded to the inner wall of the extension pipe, and a return spring is sleeved on the outside of the limit rod. The front end of the limit rod is slidably connected to the inner pipe.

[0012] Preferably, a second lever is welded to the outer wall of the inner pipe near the moisture detection needle. The second lever slides along the inner wall of the spiral groove, causing the inner pipe to rotate and displace along the inner wall of the outer pipe, accompanied by the compression of the return spring.

[0013] Preferably, the end of the moisture detection needle is inserted with a spiral hook, and the other end of the spiral hook is fixedly connected to the inner pipe. A protective shell is fitted over the moisture detection needle, one side of the protective shell is open, and the front end of the protective shell is serrated.

[0014] Preferably, a first rotating handwheel is installed at the top of the column, a groove is provided on the side of the column, and a second rotating handwheel is provided in the groove, wherein the second rotating handwheel is fixedly connected to the worm gear. One side of the display is electrically connected to one end of several wires, and the other end of the wires passes through a spiral hook and is electrically connected to a moisture detection needle.

[0015] Compared with the prior art, the beneficial effects of the present invention are: By installing several longitudinally arranged moisture detectors on one side of the column, and attaching a double-layered pipe to the end of each detector, with the length of the double-layered pipe gradually decreasing from top to bottom, the moisture detectors extend outward in a stepped pattern under the drive of the double-layered pipes. This design adapts to the root distribution of various plants. The stepped moisture detectors can flexibly adapt to the root distribution of various plants, taking into account the characteristics of plant roots growing from near to far and from shallow to deep. Regardless of how the plant roots grow, there is a detector at the appropriate depth to detect moisture, improving the adaptability and specificity of the detection.

[0016] In addition, a drive mechanism is added inside the column to convert the rotational motion into the axial extension of the moisture detection needle. The rotation of the worm gear drives each moisture detection needle to make horizontal displacement. Since the pitch of the spiral groove of the double-layer pipe gradually decreases, under the condition that the transmission ratio of the worm gear is fixed and the rotation period is consistent, the design of the decreasing pitch of the spiral groove of the outer pipe can make the moisture detection needle present a stepped extension effect from top to bottom.

[0017] In addition, the moisture detection needle and the inner tube are connected by a metal spiral hook. When the moisture detection needle is obstructed, the inner tube retracts inward and rotates, causing the moisture detection needle at the front end to rotate and move around the obstacle. At the same time, the spiral hook causes elastic bending, automatically changing the original path and avoiding hard compression between the moisture detection needle and hard obstacles. It is suitable for moisture detection in complex geological environments such as soil containing gravel and rocks. There is no need to pull it out and repeatedly adjust its position, which improves the overall detection efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the column of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the moisture detection needle of the present invention after it is extended outward.

[0021] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle.

[0022] Figure 5 This is a schematic diagram of the moisture detection needle structure of the present invention.

[0023] Figure 6 This is a schematic cross-sectional view of the double-layer pipe structure of the present invention.

[0024] Figure 7 This is a schematic diagram of the structure of the inner pipe of the present invention after it is contracted backward.

[0025] Figure 8 This is a schematic cross-sectional view of the column structure of the present invention.

[0026] In the diagram: 1. Column; 101. Limiting pipe; 102. First rotating handwheel; 103. Second rotating handwheel; 2. Spiral blade; 3. Moisture detection needle; 4. Double-layer pipe; 401. Outer pipe; 402. Inner pipe; 403. Extension pipe; 404. Spiral groove; 405. Limiting rod; 406. Return spring; 407. Second lever; 5. Drive mechanism; 501. Worm gear; 502. Worm wheel; 503. First lever; 6. Display; 7. Spiral hook; 8. Protective housing; 9. Wire. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1 to 8 The present invention provides a technical solution: an environmental moisture detector for farmland in rocky desertification areas, including a column 1 and a spiral blade 2 surrounding the outside of the column 1, wherein the spiral blade 2 is fixedly connected to the column 1, and also includes a plurality of longitudinally arranged moisture detection needles 3 disposed on one side of the column 1, and a double-layer pipe 4 installed at the end of the moisture detection needles 3 for pushing the moisture detection needles 3 to extend outward in a stepped manner and being able to automatically rotate and move to avoid obstacles, and a driving mechanism 5 disposed on the double-layer pipe 4 for driving the double-layer pipe 4 to move horizontally; A display 6, which is electrically connected to the moisture detection needle 3, is installed near the top of the column 1; Several longitudinally arranged moisture detection needles 3 are set on one side of the column 1. By rotating the column 1, the spiral blades 2 are rotated, so that the moisture detection needles 3 on the lower half of the column 1 and its side penetrate into the soil. Through the cooperation of the double-layer pipe 4 and the drive mechanism 5, several moisture detection needles 3 are inserted into the soil in a step-like manner from top to bottom to detect the soil moisture value at different levels. The stepped moisture probe 3 can flexibly adapt to the root distribution of various plants according to the characteristics of plant roots growing from near to far and from shallow to deep. No matter how the plant roots grow, there can be a probe of the corresponding depth to detect moisture, which improves the adaptability and specificity of detection. In addition, when the moisture detection needle 3 encounters an obstacle while extending outward, it triggers the double-layer pipe 4 to contract. At the same time, it can drive the moisture detection needle 3 to contract backward and rotate, avoiding hard contact. By automatically rotating and displacing, it avoids obstacles and is suitable for moisture detection in complex geological environments such as soil containing gravel and rocks. It does not require pulling out and repeatedly adjusting the position, thus improving the overall detection efficiency.

[0029] In this embodiment, as Figure 6 , Figure 7 and Figure 8 As shown, the double-layer pipe 4 includes an outer pipe 401 that penetrates the column 1, an inner pipe 402 that is sleeved inside the outer pipe 401, and an extension pipe 403 that is fixedly connected to the end of the outer pipe 401. A limiting pipe 101 is inserted into the side of the column 1 at the position corresponding to the outer pipe 401, and the outer pipe 401 and the limiting pipe 101 are connected by a sliding connection. It should be noted that the outer pipe 401, the inner pipe 402, and the extension pipe 403 together form the main frame of a double-layer pipe 4. The inner pipe 402 is connected to the moisture detection needle 3. The inner pipe 402 slides backward along the outer pipe 401, which further drives the moisture detection needle 3 to move backward. When encountering obstacles, it avoids hard compression with the obstacles and provides further protection for the moisture detection needle 3. Additionally, a limiting pipe 101 is inserted into the side of the column 1 at the position corresponding to the outer pipe 401. The limiting pipe 101 and the column 1 are connected. A slider is installed on the double-layer pipe 4. A groove matching the slider is provided on the inner wall of the limiting pipe 101. Through the cooperation of the slider and the groove, the double-layer pipe 4 can only move horizontally along the limiting pipe 101, preventing the double-layer pipe 4 from deviating. During the initial descent and subsequent retraction, the moisture detection needle 3 and the double-layer pipe 4 are all retracted into the limiting pipe 101 and protected by the limiting pipe 101.

[0030] In this embodiment, as Figure 2 and Figure 3 As shown, there are several double-layer pipes 4, and each double-layer pipe 4 is connected to a corresponding moisture detection needle 3. The length of the double-layer pipe 4 gradually decreases from top to bottom. It should be noted that a double-layered pipe 4 is installed at the end of each moisture probe 3. The length of the double-layered pipe 4 gradually decreases from top to bottom, so that the corresponding moisture probe 3 extends outward in a stepped manner under the drive of the double-layered pipe 4. The stepped distribution of the moisture probe 3 can simultaneously obtain moisture data at different depths and horizontal distances, adapt to the root distribution of various plants, and accurately detect the moisture data near the plant roots.

[0031] In this embodiment, as Figure 3 and Figure 4 As shown, each outer pipe 401 has a spiral groove 404 on its surface, and the pitch of the spiral groove 404 gradually decreases from top to bottom; The drive mechanism 5 includes a worm 501, a worm wheel 502 meshing on one side of the worm 501 corresponding to the position of the double-layer pipe 4, the worm wheel 502 being sleeved on the outside of the outer pipe 401, and a first lever 503 with a through spiral groove 404 welded to the inner wall of the worm wheel 502. The worm wheel 502 and the column 1 are connected by a bearing to form a rotating connection. It should be noted that the length of the outer pipe 401 gradually shortens from top to bottom, and the overall length of the spiral groove 404 is consistent with that of the corresponding outer pipe 401. The pitch of the spiral groove 404 gradually decreases. When the worm 501 of the drive mechanism 5 rotates, it drives the worm wheel 502 to rotate. After the worm wheel 502 rotates, the first lever 503 on its inner wall moves along the spiral groove 404. Under the action of the externally wrapped limiting pipe 101, the double-layer pipe 4 can only move back and forth, converting the rotational motion into the axial extension of the moisture detection needle 3. Due to the decreasing pitch, the following effects are achieved: Large pitch in the upper layer: When the worm gear 502 rotates once, it moves the moisture detection needle 3 and the double-layer pipe 4 a longer axial distance, quickly extending to a farther position, and getting close to the plant roots near the distance to detect, thus improving detection efficiency; Lower layer small pitch: When the worm gear 502 rotates once, the axial movement distance of the moisture detection needle 3 and the double-layer pipe 4 is shorter, reducing the extension speed and making it easier to detect soil moisture near the plant roots. With a fixed transmission ratio of worm gear 502 and worm 501 and a consistent rotation period, the moisture detection needle 3 can exhibit a stepped extension effect from top to bottom by designing a decreasing pitch of the spiral groove 404 in the outer pipe 401.

[0032] In this embodiment, as Figure 6 As shown, a limit rod 405 is welded to the inner wall of the extension pipe 403, and a return spring 406 is sleeved on the outside of the limit rod 405. The front end of the limit rod 405 is slidably connected to the inner pipe 402.

[0033] In this embodiment, as Figure 4 and Figure 6As shown, a second lever 407 is welded to one end of the outer wall of the inner pipe 402 near the moisture detection needle 3, which penetrates the spiral groove 404. The second lever 407 slides along the inner wall of the spiral groove 404, causing the inner pipe 402 to rotate and displace along the inner wall of the outer pipe 401, accompanied by the compression of the return spring 406. It should be noted that the extension pipe 403 and the outer pipe 401 are welded together. In the initial state, the extension pipe 403, the outer pipe 401, and the inner pipe 402 move synchronously. When the moisture detection needle 3 at the front end touches an obstacle and cannot continue to move forward, a reverse force is generated, which squeezes the inner pipe 402 to contract. The second lever 407 slides along the spiral groove 404, driving the axial contraction and rotation of the inner pipe 402, causing the moisture detection needle 3 at the front end to change its angle, further changing its original trajectory and avoiding the obstacle. At this time, even if the double-layer pipe 4 at the rear end continues to move forward, it can avoid the moisture detection needle 3 from being squeezed hard against the obstacle. Finally, when resetting, the reset spring 406 releases elastic potential energy and pushes the inner pipe 402 back to its initial position. In addition, in this embodiment, after the return spring 406 is slightly compressed by the soil resistance in the initial state, its elastic force is greater than the resistance of the soil at the front end. The front end of the return spring 406 is tightly pressed against the rear end of the inner pipe 402, but it is not fixedly connected to the inner pipe 402. It can provide a thrust to the inner pipe 402, and it will not hinder the inner pipe 402 when it retracts and moves backward. At the same time, it works with the limiting rod 405 to limit the return spring 406. The inner pipe 402 will slide along the limiting rod 405, which can both limit the axial movement of the inner pipe 402 and prevent the return spring 406 from twisting.

[0034] In this embodiment, as Figure 5 As shown, a spiral hook 7 is inserted into the end of the moisture detection needle 3, and the other end of the spiral hook 7 is fixedly connected to the inner pipe 402. A protective shell 8 is fitted over the moisture detection needle 3. One side of the protective shell 8 is set as an open structure, and the front end of the protective shell 8 is set as a serrated shape. It should be noted that the spiral hook 7 is made of metal and has a certain elastic deformation function. Through the connection of the metal spiral hook 7 to the moisture detection needle 3 and the inner pipe 402, when the moisture detection needle 3 is obstructed, the spiral hook 7 and the moisture detection needle 3 will rotate and shift, so that the moisture detection needle 3 at the front end can bypass the obstacle. If it continues to move forward, the rear spiral hook 7 will bend elastically when it comes into contact with an obstacle, changing its original path, so that the entire environmental moisture detector can complete its task more flexibly and efficiently when facing the complex and ever-changing farmland environment in rocky desertification areas. In addition, a protective shell 8 is added. The protective shell 8 has an opening on one side to expose the sensing probe of the moisture detection needle 3, ensuring direct contact with the soil medium. In this embodiment, the serrated front end adopts a conical serration, which can quickly penetrate the soil during the outward extension process, while protecting the moisture detection needle 3 from impacts by hard objects and extending its service life.

[0035] In this embodiment, as Figure 1 As shown, a first rotating handwheel 102 is installed at the top of the column 1, a groove is provided on the side of the column 1, and a second rotating handwheel 103 is provided in the groove. The second rotating handwheel 103 is fixedly connected to the worm gear 501. One side of the display 6 is electrically connected to one end of several wires 9, and the other end of the wires 9 passes through the spiral hook 7 and is electrically connected to the moisture detection needle 3. It should be noted that the spiral blades 2 surrounding the column 1 and the limiting pipes 101 on the side of the column 1 are welded together. They are fixedly connected to the column 1 via the first rotating handwheel 102, which drives the entire device to rotate synchronously until the moisture detection needle 3 at the bottom is fully inserted into the soil for detection. The second rotating handwheel 103 is connected to the worm gear 501, which drives the entire worm gear 501 and worm wheel 502 to rotate from the upper layer of soil. In addition, it should be noted that each wire 9 passes through an inner pipe 402 and a spiral hook 7 individually, and is electrically connected to its corresponding moisture detection needle 3. The orientation of the display 6 is consistent with the orientation of the moisture detection needle 3. The orientation of the moisture detector in the soil is determined by observing the position of the display 6. The detection results at different positions are displayed on the display 6 in real time to avoid invalid detection. The wire 9 is stored on one side of the column 1 to avoid tangling with the drive mechanism 5.

[0036] Working principle: When using this environmental moisture detector, first place the entire device on one side of the plant body, keeping a certain distance from the plant body. Determine the approximate diffusion range of its roots and stems according to the plant type, and ensure that the moisture detection needle 3 at the bottom can detect the moisture data near the outermost plant roots after it extends. Then rotate the first rotating handwheel 102 to make the column 1 and the spiral blade 2 start to rotate. The spiral blade 2 starts to rotate and move down to embed itself into the soil, driving the column 1 and several water detection needles 3 on its side to embed themselves into the soil at the same time, until all the water detection needles 3 on the top layer are embedded in the soil. Observe the position of the display 6 and make the display 6 face the position of the plant body to further ensure that all the water detection needles 3 at the bottom are aligned with the direction of the plant roots. Next, the second rotating handwheel 103 is rotated clockwise, causing the worm 501 to rotate synchronously clockwise, driving all the worm wheels 502 to rotate counterclockwise. The first lever 503 on the inner wall of the worm wheel 502 slides backward along its respective spiral groove 404, driving each double-layer pipe 4 and moisture detection needle 3 to slide forward along the limiting pipe 101. With the transmission ratio of the worm wheel 502 and worm 501 fixed and the rotation cycle consistent, the moisture detection needle 3 can extend outward in a stepped manner from top to bottom through the design of the decreasing pitch of the spiral groove 404 of the outer pipe 401. During the extension process, if a moisture detection needle 3 encounters an obstacle, it generates a reverse backward force, immediately squeezing the inner pipe 402 to contract along the outer pipe 401. The second lever 407 begins to slide along the spiral groove 404. While the inner pipe 402 and the moisture detection needle 3 contract and move backward, they rotate. The angle of the front moisture detection needle 3 changes, and its original trajectory changes to avoid the obstacle. When the front moisture detection needle 3 passes through the obstacle, the rear spiral hook 7 is elastically bent by the lateral force when it contacts the obstacle, changing its original path. During this process, it does not affect the continued outward extension of other moisture detection needles 3. Finally, when the double-layer pipe 4 slides to the end of the row, all the double-layer pipes 4 and moisture detection needles 3 pop out. The top layer moisture detection needle 3 is specifically for detecting the root system closest to the plant body. The staggered distribution allows for segmented detection of the plant root system from top to bottom and from near to far. The detection values ​​are transmitted to the display 6 at the top of the column 1 through the wire 9. The specific detection scheme is common knowledge in the field. After the detection is completed, firstly, the second rotating handwheel 103 is rotated in the opposite direction to drive all the moisture detection needles 3 back into the limiting pipe 101. Then, the first rotating handwheel 102 is rotated in the opposite direction to pull out the entire device.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An environmental moisture detector for cultivated land in rocky desertification areas, comprising a column (1) and a spiral blade (2) surrounding the outside of the column (1), wherein the spiral blade (2) is fixedly connected to the column (1), characterized in that: It also includes several longitudinally arranged moisture detection needles (3) on one side of the column (1), a double-layer pipe (4) installed at the end of the moisture detection needles (3) to push the moisture detection needles (3) to extend outward in a stepped manner and to automatically rotate and move to avoid obstacles, and a drive mechanism (5) installed on the double-layer pipe (4) to drive the double-layer pipe (4) to move horizontally. The column (1) is equipped with a display (6) that is electrically connected to the moisture detection needle (3) near the top. The double-layer pipe (4) includes an outer pipe (401) that penetrates the column (1), an inner pipe (402) that is sleeved inside the outer pipe (401), and an extension pipe (403) that is fixedly connected to the end of the outer pipe (401). A limiting pipe (101) is inserted into the side of the column (1) at the position corresponding to the outer pipe (401), and the outer pipe (401) and the limiting pipe (101) are connected by a sliding connection. Each of the outer pipes (401) has a spiral groove (404) on its surface, and the pitch of the spiral groove (404) gradually decreases from top to bottom; The inner wall of the extension pipe (403) is welded with a limiting rod (405), and a return spring (406) is sleeved on the outside of the limiting rod (405). The front end of the limiting rod (405) is slidably connected to the inner pipe (402). The outer wall of the inner pipe (402) near the moisture detection needle (3) is welded with a second lever (407) that penetrates the spiral groove (404). The second lever (407) slides along the inner wall of the spiral groove (404), causing the inner pipe (402) to rotate and shift along the inner wall of the outer pipe (401), accompanied by the compression of the return spring (406).

2. An environmental moisture detector for cultivated land in rocky desertification areas according to claim 1, characterized in that: There are several double-layer pipes (4), and each double-layer pipe (4) is connected to a number of moisture detection needles (3) in a one-to-one correspondence. The length of the double-layer pipes (4) gradually decreases from top to bottom.

3. An environmental moisture detector for cultivated land in rocky desertification areas according to claim 1, characterized in that: The drive mechanism (5) includes a worm (501), and a worm wheel (502) is engaged on one side of the worm (501) at the position corresponding to the double-layer pipe (4). The worm wheel (502) is sleeved on the outside of the outer pipe (401), and a first lever (503) through a spiral groove (404) is welded to the inner wall of the worm wheel (502). The worm wheel (502) and the column (1) are connected by a bearing to form a rotating connection.

4. An environmental moisture detector for cultivated land in rocky desertification areas according to claim 1, characterized in that: The moisture detection needle (3) is fitted with a spiral hook (7) at one end, and the other end of the spiral hook (7) is fixedly connected to the inner pipe (402). A protective shell (8) is fitted over the moisture detection needle (3). One side of the protective shell (8) is set with an open structure, and the front end of the protective shell (8) is set with a serrated shape.

5. An environmental moisture detector for cultivated land in rocky desertification areas according to claim 1, characterized in that: The top of the column (1) is equipped with a first rotating handwheel (102), the side of the column (1) is provided with a groove, and a second rotating handwheel (103) is provided in the groove. The second rotating handwheel (103) is fixedly connected to the worm gear (501). One side of the display (6) is electrically connected to one end of several wires (9), and the other end of the wires (9) passes through the spiral hook (7) and is electrically connected to the moisture detection needle (3).

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