A soil moisture correction device and method

Abstract

The present application discloses a soil moisture correction device and method, which relates to the technical field of soil moisture detection in the plant root zone. The device includes a transparent pipeline buried in the soil of the measured plant root zone, a data acquisition unit, an error correction unit, and an intelligent control unit that are connected in sequence. The data acquisition unit is used to collect the soil profile moisture data and root zone images of the soil in the measured plant root zone and send them to the error correction unit. The error correction unit is used to distinguish the soil texture and extract the root system characteristics according to the root zone images, correct the soil profile moisture data according to the soil texture and root system characteristics, and send the corrected soil profile moisture data to the intelligent control unit. The intelligent control unit is used to control the data acquisition unit to move in the transparent pipeline for the next acquisition, and upload the corrected soil profile moisture data to the cloud platform. The present application improves the accuracy of soil water content measurement.

Description

Technical Field

[0001] The present application relates to the technical field of soil moisture detection in the plant root zone, and in particular to a soil moisture correction device and method. Background Art

[0002] In agricultural cultivation and environmental science, soil moisture is a key factor influencing plant growth and ecosystem stability. Accurately monitoring soil moisture is crucial for efficient irrigation management and precision agriculture applications, particularly for understanding the moisture status of plant root zones to rationally schedule irrigation and fertilization. Therefore, soil moisture sensors are widely used in field monitoring.

[0003] Despite the diversity of traditional soil moisture sensors, their accuracy can be significantly affected by factors such as soil type, temperature fluctuations, and salt concentration, leading to data deviations or errors. This is particularly true in the root zone, where root activity and the dynamic changes in the local microenvironment make soil moisture sensors more susceptible to unstable factors, reducing the accuracy of measurement data.

[0004] While advances in soil moisture monitoring technologies have been made, most have overlooked the impact of the root zone environment on the accuracy of soil moisture sensors. Measurement errors are particularly significant in areas with high root density. These errors not only impact the accuracy of moisture data but can also mislead agricultural irrigation decisions, leading to resource waste or insufficient water supply, and consequently, crop yields.

[0005] Therefore, it is necessary to design a device and method for correcting the measurement accuracy of a soil moisture sensor in the plant root zone to effectively reduce the interference of the root system on the sensor accuracy. Summary of the Invention

[0006] The purpose of this application is to provide a soil moisture correction device and method to improve the accuracy of soil moisture measurement.

[0007] To achieve the above objectives, this application provides the following solutions.

[0008] In a first aspect, the present application provides a soil moisture correction device, comprising: a transparent pipeline buried in the soil of the root zone of the measured plant, a data acquisition unit, an error correction unit and an intelligent control unit connected in sequence; the data acquisition unit is arranged in the transparent pipeline; the transparent pipeline is used for allowing the data acquisition unit to move inside the soil of the root zone of the measured plant; the data acquisition unit is used for acquiring soil profile moisture data and root zone images of the soil of the root zone of the measured plant and sending them to the error correction unit; the error correction unit is used for discriminating the soil texture and extracting root system characteristics according to the root zone images, correcting the soil profile moisture data according to the soil texture and the root system characteristics, and sending the corrected soil profile moisture data to the intelligent control unit; the soil texture includes sandy soil, loam and clay; the root system characteristics include: root diameter, root length, root surface area and root volume; the intelligent control unit is used for controlling the data acquisition unit to move in the transparent pipeline for the next acquisition, and uploading the corrected soil profile moisture data to the cloud platform.

[0009] Optionally, the intelligent control unit specifically includes: a main control board, a driving module and a data uploading module; the main control board is connected to the driving module; the driving module is connected to the data acquisition unit; the data uploading module is connected to the error correction unit; the main control board is used for sending a driving signal to the driving module according to a set sampling time interval, a set total moving distance and a set moving interval; the driving module is used for controlling the data acquisition unit to move in the transparent pipeline for the next acquisition after receiving the driving signal; the data uploading module is used for uploading the corrected soil profile moisture data to the cloud platform.

[0010] Optionally, the driving module includes: a stepping motor, a lead screw, a conveying rod support and a conveying rod; the stepping motor is respectively connected to the main control board and the lead screw; the lead screw is connected to the conveying rod support; the conveying rod support is connected to the conveying rod; the conveying rod is connected to the data acquisition unit; the stepping motor is used for controlling the data acquisition unit to move in the transparent pipeline for the next acquisition through the lead screw, the conveying rod support and the conveying rod after receiving the driving signal; the lead screw is used for rotating under the drive of the stepping motor to drive the conveying rod support to move; the conveying rod support is used for fixing the conveying rod and driving the conveying rod to move; the conveying rod is used for driving the data acquisition unit to move.

[0011] Optionally, the driving module further includes: a coupling, an optical axis, and a limit switch; the stepping motor is connected to the lead screw through the coupling; the optical axis is connected to the conveying rod support; the limit switch is arranged on the conveying rod support; the coupling is used to drive the lead screw to rotate when the stepping motor rotates; the optical axis is used to fix the conveying rod support; the limit switch is used to limit the conveying rod support.

[0012] Optionally, the error correction unit specifically includes: a storage module, a root system feature extraction module, a data processing module, and a communication module that are connected in sequence; the storage module is further connected to the data acquisition unit; the communication module is further connected to the intelligent control unit; the storage module is used to store the soil profile moisture data and the root zone image; the root system feature extraction module is used to splice and correct the distortion of the root zone image, and distinguish the soil texture and extract the root system features according to the corrected root zone image; the data processing module is used to select a correction curve applicable to the soil texture according to the soil texture, and correct the soil profile moisture data according to the correction curve and the root system features; the correction curve is determined according to different soil textures, root system features, and soil profile moisture data; the communication module is used to send the corrected soil profile moisture data to the intelligent control unit.

[0013] Optionally, the data acquisition unit specifically includes: a soil moisture acquisition module, a plant root zone image acquisition module, and a sending module; both the soil moisture acquisition module and the plant root zone image acquisition module are connected to the sending module; the sending module is further connected to the error correction unit; the soil moisture acquisition module is used to acquire the soil profile moisture data of the soil in the root zone of the measured plant; the plant root zone image acquisition module is used to acquire the root zone image of the soil in the root zone of the measured plant; the sending module is used to send the soil profile moisture data and the root zone image to the error correction unit.

[0014] Optionally, the soil moisture acquisition module specifically includes: a sensor electrode and a sensor detection circuit that are connected in sequence; the sensor electrode is used to acquire a capacitance value; the sensor detection circuit is used to determine the soil profile moisture data according to the capacitance value and the moisture calibration equation; the moisture calibration equation is determined according to the soil profile water content of different plant root zone soils and the corresponding capacitance values.

[0015] Optionally, the sensor electrode includes: a sensor emitter, a sensor receiver, and a spacer ring; the spacer ring is located between the sensor emitter and the sensor receiver; both the sensor emitter and the sensor receiver are connected to the sensor detection circuit.

[0016] Optionally, it is characterized in that the plant root zone image acquisition module specifically includes: a camera and a light-emitting diode; the camera is used to capture the root zone image of the soil in the measured plant root zone; the light-emitting diode is used to provide a light source for the camera.

[0017] In a second aspect, the present application provides a soil moisture correction method, which is used for the soil moisture correction device described in any one of the above; the soil moisture correction method includes: obtaining the soil profile moisture data and the root zone image of the soil in the measured plant root zone; discriminating the soil texture and extracting the root system characteristics according to the root zone image, and correcting the soil profile moisture data according to the soil texture and the root system characteristics; the soil texture includes sandy soil, loam soil and clay soil; the root system characteristics include: root diameter, root length, root surface area and root volume; sending and uploading the corrected soil profile moisture data.

[0018] According to the specific embodiments provided by the present application, the present application has the following technical effects: The present application provides a soil moisture correction device and method. By arranging the data acquisition unit in a transparent pipeline, it is possible to collect information on the soil in different plant root zones without contacting the soil, solving the problem of sensor data deviation caused by factors such as different soil types, temperature changes, and salt concentrations, and realizing in-situ measurement of the soil water content in the plant root zone (that is, a detection carried out on-site with as little disturbance to the soil mass as possible to obtain relatively accurate measurement data); by correcting the soil profile moisture data according to the soil texture and root system characteristics, it solves the defect that the measurement of soil water content is easily affected by plant roots and causes inaccurate measurement, realizes the improvement of the measurement accuracy of soil water content, provides more accurate data support for precision agriculture, intelligent irrigation systems and soil moisture research, and promotes the rational allocation of resources and the sustainable management of the environment. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of a soil moisture correction device in an embodiment of the present application.

[0021] Figure 2 It is a schematic structural diagram of the connection between a data acquisition unit and an intelligent control unit provided in an embodiment of the present application.

[0022] Figure 3Schematic structural diagram of a data acquisition unit provided by an embodiment of the present application.

[0023] Figure 4 Schematic working flow diagram of a soil moisture correction device provided by an embodiment of the present application.

[0024] Reference numerals: 101 - sensor electrode; 1011 - sensor emitter; 1012 - sensor receiver; 1013 - spacer ring; 102 - sensor detection circuit; 103 - sensor housing; 104 - plant root zone image acquisition module; 1041 - camera; 1042 - light-emitting diode; 200 - error correction unit; 300 - intelligent control unit; 301 - main control board; 302 - stepping motor; 303 - lead screw; 304 - conveying rod; 305 - conveying rod support; 306 - coupling; 307 - optical axis; 308 - limit switch; 309 - battery pack; 400 - soil of the measured plant root zone; 500 - transparent pipe. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0026] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0027] In an exemplary embodiment, as Figure 1 shown, a soil moisture correction device is provided, including: a transparent pipe 500 buried in the soil 400 of the measured plant root zone, a data acquisition unit, an error correction unit 200, and an intelligent control unit 300 that are connected in sequence; the data acquisition unit is arranged in the transparent pipe 500.

[0028] The transparent pipe 500 is used to allow the data acquisition unit to move inside the soil 400 of the measured plant root zone.

[0029] The data acquisition unit is used to collect the soil profile moisture data and root zone images of the soil 400 of the measured plant root zone and send them to the error correction unit 200.

[0030] The error correction unit 200 is used to identify soil texture and extract root characteristics based on the root zone image, correct soil profile moisture data based on the soil texture and root characteristics, and send the corrected soil profile moisture data to the intelligent control unit 300; soil texture includes sandy soil, loam and clay; root characteristics include: root diameter, root length, root surface area and root volume.

[0031] The intelligent control unit 300 is used to control the data acquisition unit to move in the transparent pipe 500 to perform the next acquisition and upload the corrected soil profile moisture data to the cloud platform.

[0032] It should be noted that a transparent pipe 500 is pre-buried in the soil 400 of the root zone of the plant being tested, which is used for the data acquisition unit to move axially within the root zone of the plant. Generally, a cylindrical PVC pipe is selected for the transparent pipe 500, and the transparent pipe 500 is horizontally buried in the soil at a depth of about 20 cm to provide a movement channel for the data acquisition unit in the soil. When in use, it is necessary to dig a soil groove in the soil. The width of the soil groove is the diameter of the transparent pipe 500, and the transparent pipe 500 is buried in the soil groove. The transparent pipe 500 will not affect the normal growth of the plant.

[0033] In another exemplary embodiment of the present application, the soil moisture correction device further includes a host computer, which is communicatively connected to the data acquisition circuit board.

[0034] In another exemplary embodiment of the present application, Figure 2 As shown, the intelligent control unit 300 specifically includes: a main control board 301, a driving module and a data upload module; the main control board 301 is connected to the driving module; the driving module is connected to the data acquisition unit; and the data upload module is connected to the error correction unit 200.

[0035] The main control board 301 is used to send a driving signal to the driving module according to a set sampling time interval, a set total moving distance and a set moving interval.

[0036] The driving module is used to control the data acquisition unit to move in the transparent pipe 500 after receiving the driving signal, so as to perform the next acquisition.

[0037] The data upload module is used to upload the corrected soil profile moisture data to the cloud platform. The data upload module is also used to send the driving signal to the cloud platform. The cloud platform and the data upload module are connected via 4G.

[0038] In another exemplary embodiment of the present application, the intelligent control unit 300 further includes a battery pack 309 , which provides a 12V power output to the unit, and the input can be powered by indoor electricity or external solar energy.

[0039] In another exemplary embodiment of the present application, as Figure 2 shown, the driving module includes: a stepping motor 302, a lead screw 303, a conveying rod support 305, and a conveying rod 304; the stepping motor 302 is respectively connected to the main control board 301 and the lead screw 303; the lead screw 303 is connected to the conveying rod support 305; the conveying rod support 305 is connected to the conveying rod 304; the conveying rod 304 is connected to the data acquisition unit.

[0040] The stepping motor 302 is configured to, after receiving a driving signal, control the data acquisition unit to move within the transparent pipeline 500 through the lead screw 303, the conveying rod support 305, and the conveying rod 304 for the next acquisition.

[0041] The lead screw 303 is configured to rotate under the drive of the stepping motor 302 and drive the conveying rod support 305 to move.

[0042] The conveying rod support 305 is configured to fix the conveying rod 304 and drive the conveying rod 304 to move.

[0043] The conveying rod 304 is configured to drive the data acquisition unit to move. For example, it can drive the data acquisition unit to move in the horizontal direction of the transparent pipeline.

[0044] In another exemplary embodiment of the present application, as Figure 2 shown, the driving module further includes: a coupling 306, an optical axis 307, and a limit switch 308.

[0045] The stepping motor 302 is connected to the lead screw 303 through the coupling 306; the optical axis 307 is connected to the conveying rod support 305; the limit switch 308 is disposed on the conveying rod support 305.

[0046] The coupling is configured to drive the lead screw 303 to rotate when the stepping motor 302 rotates.

[0047] The optical axis 307 is configured to fix the conveying rod support 305.

[0048] The limit switch 308 is configured to limit the conveying rod support 305.

[0049] As an alternative implementation, the conveying rod support can be a sliding table, the conveying rod is fixed to the sliding table, and the data acquisition unit is at the other end of the conveying rod (only the conveying rod and the data acquisition unit move in the PVC pipe). The rotation of the motor controls the movement of the conveying rod support, thereby driving the movement of the conveying rod, and further driving the movement of the data acquisition unit. Both the conveying rod and the conveying rod support are rigid structures with unchanged lengths.

[0050] In another exemplary embodiment of the present application, the error correction unit 200 specifically includes: a storage module, a root system feature extraction module, a data processing module, and a communication module connected in sequence; the storage module is also connected to the data acquisition unit; the communication module is also connected to the intelligent control unit 300.

[0051] The storage module is used to store soil profile moisture data and root zone images.

[0052] The root system feature extraction module is used to splice and correct the distortion of the root zone image, and discriminate the soil texture and extract the root system features according to the corrected root zone image.

[0053] The data processing module is used to select a correction curve applicable to the soil texture according to the soil texture, and correct the soil profile moisture data according to the correction curve and the root system features; the correction curve is determined according to different soil textures, root system features, and soil profile moisture data.

[0054] The communication module is used to send the corrected soil profile moisture data to the intelligent control unit 300.

[0055] In another exemplary embodiment of the present application, as Figure 3 shown, the data acquisition unit specifically includes:

[0056] a soil moisture acquisition module, a plant root zone image acquisition module 104, and a sending module; the soil moisture acquisition module and the plant root zone image acquisition module 104 are both connected to the sending module; the sending module is also connected to the error correction unit 200.

[0057] The soil moisture acquisition module is used to obtain the soil profile moisture data of the soil 400 in the root zone of the measured plant.

[0058] [[ID=2,6]]The plant root zone image acquisition module 104 is used to obtain the root zone image of the soil 400 in the root zone of the measured plant.

[0059] The sending module is used to send the soil profile moisture data and the root zone image to the error correction unit 200.

[0060] In another exemplary embodiment of the present application, as Figure 2 and Figure 3 shown, the soil moisture acquisition module specifically includes: a sensor electrode 101 and a sensor detection circuit 102 connected in sequence.

[0061] The sensor electrode 101 is used to obtain a capacitance value.

[0062] The sensor detection circuit 102 is used to determine the soil profile moisture data according to the capacitance value and the moisture calibration equation; the moisture calibration equation is determined according to the soil profile water content and the corresponding capacitance value of different plant root zone soils.

[0063] In another exemplary embodiment of the present application, as Figure 3 shown, the sensor electrode 101 includes: a sensor emitter 1011, a sensor receiver 1012, and a spacer ring 1013; the spacer ring 1013 is located between the sensor emitter 1011 and the sensor receiver 1012; both the sensor emitter 1011 and the sensor receiver 1012 are connected to the sensor detection circuit 102.

[0064] It should be noted that during measurement, an outer edge electromagnetic field will be generated between the sensor emitter 1011 and the sensor receiver 1012. This outer edge electromagnetic field and the soil 400 in the root zone of the measured plant form a capacitor, and its capacitance value is proportional to the water content in the soil of the plant root zone. Therefore, after obtaining the moisture calibration equation of the root zone soil, by detecting the change of the capacitance impedance in real time and reflecting this change through the measured voltage value, the moisture of the soil 400 in the root zone of the measured plant can be indirectly obtained.

[0065] In another exemplary embodiment of the present application, the sensor detection circuit 102 is built-in with a digital temperature sensor DS18B20, which is used to detect the board temperature and correct the temperature calibration of the data acquisition unit.

[0066] In another exemplary embodiment of the present application, as Figure 3 shown, the plant root zone image acquisition module 104 specifically includes: a camera 1041 and a light-emitting diode 1042.

[0067] The camera 1041 is used to capture the root zone image of the soil 400 in the root zone of the measured plant.

[0068] The light-emitting diode 1042 is used to provide light source for the camera 1041.

[0069] The data acquisition unit further includes a sensor housing 103. The sensor housing 103 is located inside the transparent pipeline 500. The sensor detection circuit 102 is located inside the sensor housing 103. The sensor electrode 101 is arranged on the surface of the sensor housing 103. The plant root zone image acquisition module 104 is arranged at the front end of the surface of the sensor housing 103. The data acquisition unit is connected to the conveying rod 304 through the sensor housing 103. The camera 1041 is located at the front end of the housing; the light-emitting diode 1042 is located around the camera 1041.

[0070] Based on the above embodiments, as Figure 4 shown, the present application proposes a soil moisture correction device affected by the plant root zone, and the working process is as follows.

[0071] S1: The soil moisture acquisition module measures the soil profile moisture data under the plant roots and transmits the data to the data processing module. The plant root zone image acquisition module 104 acquires the plant root zone images and transmits them to the root system feature extraction module.

[0072] S2: The root system feature extraction module stitches and corrects the distortion of the root zone images, discriminates the soil texture, and extracts the root system features.

[0073] S3: Select the corresponding calibration curve according to the soil texture.

[0074] S4: Calibrate the soil profile moisture data in S1 according to the root system features based on the calibration curve selected in S3 to obtain the calibrated soil profile moisture data.

[0075] S5: Upload the soil profile moisture data in S4 to the cloud platform.

[0076] The specific working process of the device includes the following steps: First, dig a soil trough in the plant root zone, cut a transparent pipe 500 of appropriate length according to the measured distance, and horizontally bury the transparent pipe 500 in the soil trough. Place the intelligent control unit 300 horizontally with the transparent pipe 500 to ensure that the conveying rod 304 can move smoothly in the transparent pipe 500.

[0077] Place the data acquisition unit in the transparent pipe 500. The intelligent control unit 300 controls the operation of the entire device and the acquisition, calibration, and storage of data. When the device is powered on, the system starts. The intelligent control unit 300 controls the data acquisition unit to move according to the set sampling time interval, total moving distance, and interval distance.

[0078] First, the data acquisition unit needs to perform position initialization. The stepping motor 302 drives the lead screw to rotate forward together, driving the conveying rod support 305 to drive the data acquisition unit to move towards the direction of the soil in the plant root zone. When the conveying rod support 305 touches the limit switch 308, stop moving, and the data acquisition unit completes position initialization. After the data acquisition unit completes position initialization, the stepping motor 302 rotates in reverse, and the data acquisition unit moves in the reverse direction according to the total moving distance set by the program. After reaching the specified position, the stepping motor 302 starts to rotate forward, and the data acquisition unit moves according to the set moving interval. After moving, pause for three seconds to facilitate the data acquisition unit to complete the acquisition of soil moisture data and plant root zone images. When the data acquisition unit moves the total distance, the acquisition of soil moisture in the plant root zone soil and root zone image information is completed, and the data acquisition unit returns to the initial position.

[0079] The error correction unit 200 receives and stores the information sent by the data acquisition unit, identifies the soil texture (mainly including sandy soil, loam, and clay) through the root zone image information, and extracts the root system characteristics (mainly including root diameter, root length, root surface area, root volume, etc.). According to the soil texture information, a correction curve suitable for this soil texture is selected, and then the soil root zone profile moisture is corrected based on the root system characteristic information extracted from the plant root system image. The corrected soil profile moisture information is sent to the intelligent control unit 300.

[0080] The intelligent control unit 300 sends the sampled position information and the plant root zone soil moisture information at the corresponding position to the cloud platform, and then the entire system enters the low-power sleep state, waiting for the alarm clock of the main control board 301 to measure the time interval to wake up the system for the next acquisition.

[0081] Based on the same inventive concept, the embodiment of the present application also provides a soil moisture correction method for implementing the soil moisture correction device involved above. The implementation solution provided by this method to solve the problem is similar to the implementation solution recorded in the above device. Therefore, the specific limitations in one or more soil moisture correction method embodiments provided below can refer to the limitations on the soil moisture correction device in the above text, and will not be repeated here.

[0082] In an exemplary embodiment, a soil moisture correction method is provided, including: obtaining the soil profile moisture data and the root zone image of the soil 400 in the root zone of the measured plant.

[0083] Discriminate the soil texture and extract the root system characteristics according to the root zone image, and correct the soil profile moisture data according to the soil texture and the root system characteristics; the soil texture includes sandy soil, loam, and clay; the root system characteristics include: root diameter, root length, root surface area, and root volume.

[0084] Send and upload the corrected soil profile moisture data.

[0085] The device and method can automatically and real-time detect the soil profile moisture data according to the set sampling time interval, moving distance, and measurement depth interval, and correct the error of the soil profile moisture data affected by the plant root system (this data can be obtained by using a soil moisture sensor) according to the soil texture and the root system characteristics, protecting the integrity of the plant root zone, which is of great significance for the research of the plant root zone.

[0086] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not conflict, it should be considered as the scope recorded in this specification.

[0087] In this text, specific examples are used to illustrate the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A soil moisture correction device, characterized in that, The soil moisture correction device includes: a transparent pipeline buried in the soil of the root zone of the measured plant, a data acquisition unit, an error correction unit, and an intelligent control unit that are connected in sequence; the data acquisition unit is arranged in the transparent pipeline; The transparent pipeline is used for the data acquisition unit to move inside the soil of the root zone of the measured plant; The data acquisition unit is used to collect the soil profile moisture data and root zone images of the soil in the root zone of the measured plant, and send them to the error correction unit; The error correction unit is used to judge the soil texture and extract root system characteristics according to the root zone image, correct the soil profile moisture data according to the soil texture and the root system characteristics, and send the corrected soil profile moisture data to the intelligent control unit; the soil texture includes sandy soil, loam and clay; the root system characteristics include: root diameter, root length, root surface area and root volume; The error correction unit specifically includes: a data processing module, which is used to select a correction curve applicable to the soil texture according to the soil texture, and correct the soil profile moisture data according to the correction curve and the root system characteristics; the correction curve is determined according to different soil textures, root system characteristics, and soil profile moisture data; The error correction unit specifically includes: a storage module, a root system characteristic extraction module, a data processing module, and a communication module that are connected in sequence; the storage module is also connected to the data acquisition unit; the communication module is also connected to the intelligent control unit; The storage module is used to store the soil profile moisture data and the root zone images; The root system characteristic extraction module is used to splice and correct the distortion of the root zone image, and judge the soil texture and extract the root system characteristics according to the corrected root zone image; The communication module is used to send the corrected soil profile moisture data to the intelligent control unit; The intelligent control unit is used to control the movement of the data acquisition unit in the transparent pipeline for the next acquisition, and upload the corrected soil profile moisture data to the cloud platform.

2. The soil moisture correction device according to claim 1, wherein The intelligent control unit specifically includes: a main control board, a driving module, and a data uploading module; the main control board is connected to the driving module; the driving module is connected to the data acquisition unit; the data uploading module is connected to the error correction unit; The main control board is used to send a driving signal to the driving module according to the set sampling time interval, the set total movement distance, and the set movement interval; The driving module is used to control the movement of the data acquisition unit in the transparent pipeline for the next acquisition after receiving the driving signal; The data uploading module is used to upload the corrected soil profile moisture data to the cloud platform.

3. The soil moisture correction device according to claim 2, wherein The driving module includes: a stepper motor, a lead screw, a conveying rod support, and a conveying rod; the stepper motor is respectively connected to the main control board and the lead screw; the lead screw is connected to the conveying rod support; the conveying rod support is connected to the conveying rod; the conveying rod is connected to the data acquisition unit; The stepping motor is used to control the data acquisition unit to move in the transparent pipe through the lead screw, the delivery rod support and the delivery rod after receiving the driving signal, so as to perform the next acquisition; The lead screw is used to rotate under the drive of the stepping motor, driving the conveying rod support to move; The conveying rod support is used to fix the conveying rod and drive the conveying rod to move; The conveying rod is used to drive the data acquisition unit to move.

4. The soil moisture correction device according to claim 3, characterized in that, The driving module further comprises: a coupling, an optical axis and a limit switch; The stepper motor is connected to the lead screw through the coupling; the optical axis is connected to the conveying rod support; the limit switch is arranged on the conveying rod support; The coupling is used to drive the lead screw to rotate when the stepping motor rotates; The optical axis is used to fix the delivery rod support; The limit switch is used to limit the conveying rod support.

5. The soil moisture correction device according to claim 1, characterized in that The data acquisition unit specifically includes: A soil moisture collection module, a plant root zone image collection module, and a sending module; the soil moisture collection module and the plant root zone image collection module are both connected to the sending module; the sending module is also connected to the error correction unit; The soil moisture collection module is used to obtain soil profile moisture data of the root zone soil of the tested plant; The plant root zone image acquisition module is used to obtain the root zone image of the soil in the root zone of the tested plant; The sending module is used to send the soil profile moisture data and the root zone image to the error correction unit.

6. The soil moisture correction device according to claim 5, wherein, The soil moisture collection module specifically includes: sensor electrodes and sensor detection circuits connected in sequence; The sensor electrode is used to obtain a capacitance value; The sensor detection circuit is used to determine soil profile moisture data based on the capacitance value and a moisture calibration equation; the moisture calibration equation is determined based on the soil profile moisture content and corresponding capacitance values of soil in different plant root zones.

7. The soil moisture correction device according to claim 6, wherein The sensor electrode includes: a sensor emitter, a sensor receiver and a spacer ring; the spacer ring is located between the sensor emitter and the sensor receiver; the sensor emitter and the sensor receiver are both connected to the sensor detection circuit.

8. The soil moisture correction device according to claim 5, characterized in that The plant root zone image acquisition module specifically includes: a camera and a light emitting diode; The camera is used to capture the root zone image of the soil in the root zone of the tested plant; The light emitting diode is used to provide a light source for the camera.

9. A soil moisture correction method, characterized in that, The soil moisture correction method is used for the soil moisture correction device according to any one of claims 1 to 8; the soil moisture correction method comprises: Obtain soil profile moisture data and root zone images of the tested plant root zone soil; identifying soil texture and extracting root system characteristics based on the root zone image, and correcting the soil profile moisture data based on the soil texture and the root system characteristics; the soil texture includes sandy soil, loam, and clay; the root system characteristics include: root diameter, root length, root surface area, and root volume; Send and upload the corrected soil profile moisture data.

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