Soil moisture correction device and method

Abstract

The invention discloses a soil moisture correction device and method, and relates to the technical field of plant root zone soil moisture detection, and the device comprises a transparent pipeline buried in plant root zone soil to be detected, and a data acquisition unit, an error correction unit and an intelligent control unit which are connected in sequence; the data acquisition unit is used for acquiring soil profile moisture data and a root zone image of root zone soil of a measured plant and sending the data to the error correction unit; the error correction unit is used for judging soil texture and extracting root system characteristics according to the root zone image, correcting 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; and the intelligent control unit is used for controlling the data acquisition unit to move in the transparent pipeline so as to carry out next acquisition, and uploading the corrected soil profile moisture data to the cloud platform. The precision of soil water content measurement is improved.

Description

Technical Field

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

[0002] In agricultural planting and environmental science, soil moisture is one of the important factors affecting plant growth and ecosystem stability. In order to achieve efficient irrigation management and precision agriculture applications, especially to reasonably arrange irrigation and fertilization by understanding the moisture status of plant root zones, accurate monitoring of soil moisture content becomes the key. Therefore, soil moisture sensors are widely used in field monitoring.

[0003] Although there are many types of traditional soil moisture sensors, the measurement accuracy of the sensors will be significantly disturbed by factors such as different soil types, temperature changes, and salt concentrations, resulting in data deviation or error. Especially in the soil of plant root zones, due to the dynamic changes in root activity and local microenvironment, soil moisture sensors are more susceptible to unstable factors, resulting in reduced accuracy of measurement data.

[0004] Although relevant technologies for soil moisture monitoring have made some progress, most of them ignore the impact of the root zone environment on the measurement accuracy of soil moisture sensors, especially in high-density root areas, where measurement errors are more significant. The existence of such errors will not only affect the accuracy of moisture data, but may also mislead agricultural irrigation decisions, resulting in resource waste or insufficient water supply, and thus affecting 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 content measurement.

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

[0008] In the first aspect, the present application provides a soil moisture correction device, comprising: a transparent pipe buried in the soil of the root zone of a tested 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 pipe; the transparent pipe is used for the data acquisition unit to move inside the soil of the root zone of the tested plant; the data acquisition unit is used to collect soil profile moisture data and root zone images of the soil in the root zone of the tested plant, and send them to the error correction unit; the error correction unit is used to distinguish soil texture and extract 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, and send the corrected soil profile moisture data to the intelligent control unit; the soil texture includes sand, loam and clay; the root system characteristics include: root diameter, root length, root surface area and root volume; the intelligent control unit is used to control the data acquisition unit to move in the transparent pipe for the next collection, and upload 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 upload module; the main control board is connected to the driving module; the driving module is connected to the data acquisition unit; the data upload 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 a set sampling time interval, a set total moving distance and a set moving interval; the driving module is used to control the data acquisition unit to move in the transparent pipe after receiving the driving signal to perform the next collection; the data upload module is used to upload the corrected soil profile moisture data to the cloud platform.

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

[0011] Optionally, the driving module also includes: a coupling, an optical axis and a limit switch; the stepper motor is connected to the lead screw via 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 stepper 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 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; the storage module is used to store the soil profile moisture data and the root zone image; the root feature extraction module is used to splice and correct the distortion of the root zone image, and identify the soil texture and extract the root characteristics based on the corrected root zone image; the data processing module is used to select a correction curve suitable for the soil texture according to the soil texture, and correct the soil profile moisture data according to the correction curve and the root characteristics; the correction curve is determined according to different soil textures, root characteristics, 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; the soil moisture acquisition module and the plant root zone image acquisition module are both connected to the sending module; the sending module is also connected to the error correction unit; the soil moisture acquisition module is used to obtain soil profile moisture data of the soil in the root zone 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.

[0014] Optionally, the soil moisture collection module specifically includes: a sensor electrode and a sensor detection circuit 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 of soil in different plant root zones and the corresponding capacitance value.

[0015] Optionally, the sensor electrode comprises: 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.

[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 root zone of the measured plant; the light emitting diode is used to provide a light source for the camera.

[0017] In the 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-mentioned methods; the soil moisture correction method comprises: obtaining soil profile moisture data and root zone image of the soil in the root zone of the tested plant; judging 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 and clay; 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, which can collect information on soil in the root zones of different plants without contacting the soil by setting a data acquisition unit in a transparent pipe, thereby 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 soil moisture content in the root zone of plants (i.e., a test conducted on-site with as little disturbance to the soil as possible to obtain more accurate measurement data as possible); by correcting soil profile moisture data according to soil texture and root characteristics, the defect of inaccurate soil moisture measurement caused by the influence of plant roots is solved, and the accuracy of soil moisture measurement is improved, providing more accurate data support for precision agriculture, intelligent irrigation systems, and soil moisture research, and promoting rational resource allocation and sustainable environmental management. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of a soil moisture correction device in one embodiment of the present application.

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

[0022] Figure 3A structural diagram of a data acquisition unit provided in one embodiment of the present application.

[0023] Figure 4 A schematic diagram of the working process of a soil moisture correction device provided in one embodiment of the present application.

[0024] Figure 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-screw; 304-conveying rod; 305-conveying rod support; 306-coupling; 307-optical axis; 308-limit switch; 309-battery pack; 400-soil in the root zone of the plant to be measured; 500-transparent pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

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

[0028] The transparent pipe 500 is used for the data collection unit to move inside the soil 400 in the root zone of the plant under test.

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

[0030] The error correction unit 200 is used to determine the soil texture and extract the root system characteristics based on the root zone image, and to correct the soil profile moisture data based on the soil texture and root system characteristics, and send the corrected soil profile moisture data to the intelligent control unit 300; the soil texture includes sandy soil, loam and clay; the root system 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 to be tested, which is used for the data acquisition unit to move axially inside 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 at a depth of about 20 cm in the soil to provide a moving 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 which is the diameter of the transparent pipe 500, and bury the transparent pipe 500 in the soil groove, wherein 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 drive 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 room electricity or external solar energy.

[0039] In another exemplary embodiment of the present application, Figure 2 As shown, the driving module includes: a stepper motor 302, a lead screw 303, a conveying rod support 305 and a conveying rod 304; the stepper motor 302 is connected to the main control board 301 and the lead screw 303 respectively; 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 stepper motor 302 is used to control the data acquisition unit to move in the transparent pipe 500 through the lead screw 303, the delivery rod support 305 and the delivery rod 304 after receiving the driving signal, so as to perform the next acquisition.

[0041] The lead screw 303 is used 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 used to fix the conveying rod 304 and drive the conveying rod 304 to move.

[0043] The conveying rod 304 is used 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 pipe.

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

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

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

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

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

[0049] As an optional implementation, the conveyor rod support can be a slide, the conveyor rod and the slide are fixed together, and the data acquisition unit is at the other end of the conveyor rod (only the conveyor rod and the data acquisition unit move in the PVC tube). The motor rotates to control the movement of the conveyor rod support, thereby driving the conveyor rod to move, and then driving the data acquisition unit to move. Both the conveyor rod and the conveyor rod support are rigid structures with constant length.

[0050] In another exemplary embodiment of the present application, the error correction unit 200 specifically includes: a storage module, a root 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; and 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 feature extraction module is used to stitch and correct the distortion of the root zone images, and to identify the soil texture and extract the root features based on the corrected root zone images.

[0053] The data processing module is used to select a calibration curve suitable for the soil texture according to the soil texture, and to calibrate the soil profile moisture data according to the calibration curve and root characteristics; the calibration curve is determined based on different soil textures, root characteristics, 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, Figure 3 As shown, the data acquisition unit specifically includes: Soil moisture collection module, plant root zone image collection module 104 and sending module; the soil moisture collection module and the plant root zone image collection module 104 are both connected to the sending module; the sending module is also connected to the error correction unit 200.

[0056] The soil moisture collection module is used to obtain soil profile moisture data of the root zone soil 400 of the tested plant.

[0057] The plant root zone image acquisition module 104 is used to obtain the root zone image of the root zone soil 400 of the detected plant.

[0058] The sending module is used to send the soil profile moisture data and the root zone image to the error correction unit 200.

[0059] In another exemplary embodiment of the present application, Figure 2 and Figure 3 As shown, the soil moisture collection module specifically includes: a sensor electrode 101 and a sensor detection circuit 102 connected in sequence.

[0060] The sensor electrode 101 is used to obtain a capacitance value.

[0061] 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 moisture content of the soil in the root zone of different plants and the corresponding capacitance value.

[0062] In another exemplary embodiment of the present application, Figure 3 As 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 ; the sensor emitter 1011 and the sensor receiver 1012 are both connected to the sensor detection circuit 102 .

[0063] It should be noted that during measurement, the sensor emitter 1011 and the sensor receiver 1012 will generate an outer edge electromagnetic field, which forms a capacitor with the soil 400 in the root zone of the plant being measured, and its capacitance value is proportional to the water content of the soil in the root zone of the plant. Therefore, after obtaining the moisture calibration equation of the soil in the root zone, the change of the capacitor impedance is detected in real time, and the change is reflected by the measured voltage value, so that the moisture of the soil 400 in the root zone of the plant being measured can be indirectly obtained.

[0064] In another exemplary embodiment of the present application, the sensor detection circuit 102 has a built-in digital temperature sensor DS18B20 for detecting the onboard temperature and correcting the temperature calibration of the data acquisition unit.

[0065] In another exemplary embodiment of the present application, Figure 3 As shown, the plant root zone image acquisition module 104 specifically includes: a camera 1041 and a light emitting diode 1042 .

[0066] The camera 1041 is used to capture the root zone image of the root zone soil 400 of the plant under test.

[0067] The light emitting diode 1042 is used to provide light source for the camera 1041 .

[0068] The data acquisition unit further includes a sensor housing 103, the sensor housing 103 is located inside the transparent pipe 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, and 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; and the light emitting diode 1042 is located around the camera 1041.

[0069] Based on the above embodiments, Figure 4 As shown, the present application proposes a soil moisture correction device under the influence of plant root zone, and the working process is as follows.

[0070] S1: The soil moisture acquisition module measures the soil profile moisture data under the plant root system and transmits the data to the data processing module. The plant root zone image acquisition module 104 acquires the plant root zone image and transmits it to the root system feature extraction module.

[0071] S2: The root feature extraction module stitches and corrects the root zone images, identifies the soil texture and extracts the root features.

[0072] S3: Select the corresponding calibration curve according to the soil texture.

[0073] S4: Correct the soil profile moisture data of S1 according to the correction curve selected in S3 according to the root characteristics to obtain corrected soil profile moisture data.

[0074] S5: Upload the soil profile moisture data of S4 to the cloud platform.

[0075] The specific working process of the device includes the following steps: first, a soil groove is dug in the plant root area, a transparent pipe 500 of appropriate length is cut according to the measured distance, and the transparent pipe 500 is horizontally buried in the soil groove. The intelligent control unit 300 and the transparent pipe 500 are placed horizontally to ensure that the conveying rod 304 can move smoothly in the transparent pipe 500.

[0076] The data acquisition unit is placed in the transparent pipe 500. The intelligent control unit 300 controls the operation of the entire device as well as the collection, correction and storage of data. The device is turned on and the system starts. The intelligent control unit 300 controls the movement of the data acquisition unit according to the set sampling time interval, the total distance moved and the interval distance.

[0077] First, the data acquisition unit needs to be initialized. The stepper motor 302 drives the lead screw to rotate forward, driving the conveying rod support 305 to drive the data acquisition unit to move in the direction close to the soil in the plant root zone. When the conveying rod support 305 touches the limit switch 308, it stops moving, and the data acquisition unit completes the position initialization. After the data acquisition unit completes the position initialization, the stepper motor 302 reverses, and the data acquisition unit moves in the opposite direction according to the total moving distance set by the program. After reaching the specified position, the stepper motor 302 starts to rotate forward, and the data acquisition unit moves according to the set moving distance. After moving, it pauses for three seconds to facilitate the data acquisition unit to complete the collection of soil moisture data and plant root zone images. When the data acquisition unit moves the total distance, the soil moisture of the plant root zone soil and the root zone image information are collected, and the data acquisition unit returns to the initial position.

[0078] The error correction unit 200 receives and stores the information sent by the data acquisition unit, identifies the soil texture (mainly including sand, loam, and clay) and extracts the root characteristics (mainly including root diameter, root length, root surface area, root volume, etc.) through the root zone image information, selects a correction curve suitable for the soil texture according to the soil texture information, and then corrects the soil root zone profile moisture according to the root characteristic information extracted from the plant root image. The corrected soil profile moisture information is sent to the intelligent control unit 300.

[0079] The intelligent control unit 300 sends the sampling location information and the soil moisture information of the plant root zone at the corresponding location to the cloud platform, and then the entire system enters a low-power sleep state, waiting for the alarm clock of the main control board 301 to wake up the system for the next collection.

[0080] 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 scheme for solving the problem provided by the method is similar to the implementation scheme recorded in the above device, so 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 above, and will not be repeated here.

[0081] In an exemplary embodiment, a soil moisture correction method is provided, including: obtaining soil profile moisture data and a root zone image of the root zone soil 400 of the tested plant.

[0082] Soil texture is identified and root characteristics are extracted based on the root zone image, and soil profile moisture data is corrected based on soil texture and root characteristics; soil texture includes sandy soil, loam and clay; root characteristics include: root diameter, root length, root surface area and root volume.

[0083] Send and upload the corrected soil profile moisture data.

[0084] The device and method can automatically detect soil profile moisture data in real time according to the set sampling time interval, moving distance and measurement depth interval, and correct the errors of soil profile moisture data (this data can be obtained using a soil moisture sensor) affected by plant roots according to soil texture and root characteristics, thereby protecting the integrity of the plant root zone and having important significance for plant root zone research.

[0085] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A soil moisture correction device, characterized in that: The soil moisture correction device comprises: a transparent pipe buried in the soil of the root zone of the plant to be tested, 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 pipe; The transparent pipe is used for the data acquisition unit to move inside the soil of the root zone of the plant under test; The data acquisition unit is used to collect soil profile moisture data and root zone images of the soil in the root zone of the tested plant, and send them to the error correction unit; The error correction unit is used to identify soil texture and extract 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, and send the corrected soil profile moisture data to the intelligent control unit; the soil texture includes sand, loam and clay; the root system characteristics include: root diameter, root length, root surface area and root volume; The intelligent control unit is used to control the data acquisition unit to move in the transparent pipe to perform 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, characterized in that: 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 a set sampling time interval, a set total moving distance and a set moving interval; The driving module is used to control the data acquisition unit to move in the transparent pipe after receiving the driving signal, so as to perform the next acquisition; 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, characterized in that: The driving module comprises: a stepping motor, a lead screw, a conveying rod support and a conveying rod; the stepping motor is connected to the main control board and the lead screw respectively; 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 stepper 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, thereby 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 also includes: 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 stepper 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 error correction unit specifically includes: a storage module, a root 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; 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 perform splicing and distortion correction on the root area image, and to identify the soil texture and extract the root system feature based on the corrected root area image; The data processing module is used to select a calibration curve suitable for the soil texture according to the soil texture, and calibrate the soil profile moisture data according to the calibration curve and the root system characteristics; the calibration curve is determined according to different soil textures, root system characteristics, and soil profile moisture data; The communication module is used to send the corrected soil profile moisture data to the intelligent control unit.

6. 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.

7. The soil moisture correction device according to claim 6, characterized in that: The soil moisture collection module specifically comprises: 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 according to the capacitance value and the moisture calibration equation; the moisture calibration equation is determined according to the soil profile moisture content of soil in different plant root zones and the corresponding capacitance value.

8. The soil moisture correction device according to claim 7, characterized in that: The sensor electrode comprises: 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.

9. The soil moisture correction device according to claim 6, 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 light source for the camera.

10. 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 9; the soil moisture correction method comprises: Obtain soil profile moisture data and root zone images of the root zone soil of the tested plant; According to the root zone image, soil texture is determined and root system characteristics are extracted, and the soil profile moisture data is corrected 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; Send and upload the corrected soil profile moisture data.

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