Water level detection device, agricultural detection equipment and control method of agricultural detection equipment

Abstract

The invention belongs to the technical field of agricultural detection, and particularly relates to a water level detection device, agricultural detection equipment and a control method thereof, and the water level detection device comprises a first sleeve which is provided with a closed first accommodating cavity and is used for being installed on the horizontal surface of a to-be-detected object and extending in the vertical direction; the linear driving mechanism is mounted at the top end of the first accommodating cavity; the water level detection part is mounted at the movable end of the linear driving mechanism, is arranged away from the top end of the first accommodating cavity and is used for detecting the humidity of the periphery of the first sleeve and sending out a first detection signal; the control module is installed on the first sleeve and is in communication connection with the water level detection piece and the linear driving mechanism, and the control module is configured to control the linear driving mechanism to drive the water level detection piece to move and obtain a first detection signal in real time; determining the water level of the to-be-detected object according to the first detection signal. The water level detection device can detect the water level of the object to be detected more accurately.

Description

Technical Field

[0001] This invention belongs to the field of agricultural testing technology, specifically relating to a water level detection device, agricultural testing equipment and its control method. Background Technology

[0002] Due to factors such as rainfall, soil changes from a dry state (lacking water) to a moist state (containing a suitable amount of moisture), eventually reaching water saturation and becoming submerged. High-precision monitoring of surface water levels and soil moisture content is necessary for farmland irrigation and water conservancy projects.

[0003] Existing technologies include devices that simultaneously detect surface water levels and soil moisture content. However, most of these devices detect surface water levels by using ultrasound or lasers to measure the height difference between the water surface and the instrument. This method is susceptible to interference from impurities on the water surface, resulting in low accuracy. Other devices use multiple vertically distributed water level sensors, but this increases the cost and limits the detection to a few fixed heights, leading to low accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a water level detection device, agricultural detection equipment and its control method to improve the accuracy of water level detection of objects to be detected.

[0005] To achieve the above objectives, the present invention provides a water level detection device, comprising:

[0006] The first sleeve has a closed first receiving cavity. The first sleeve is used to be installed on the horizontal surface of the object to be tested and extends in the vertical direction.

[0007] A linear drive mechanism is installed at the top of the first receiving cavity;

[0008] A water level detection element is installed on the movable end of the linear drive mechanism and is positioned away from the top of the first receiving cavity. The water level detection element is used to detect the humidity of the outer periphery of the first sleeve and send out a first detection signal.

[0009] The control module is installed on the first sleeve and is communicatively connected to both the water level detection element and the linear drive mechanism. The control module is configured to: control the linear drive mechanism to drive the water level detection element to move and acquire the first detection signal in real time; and determine the water level of the object to be detected based on the first detection signal.

[0010] In some embodiments, the water level detection element is a capacitive sensor, and the detection end of the capacitive sensor slides against the inner peripheral wall of the first sleeve.

[0011] In some embodiments, the water level detection device further includes: a telescopic signal transmission line, which is elastically connected between the water level detection element and the control module and is used to transmit a first detection signal to the control module.

[0012] In some embodiments, the linear drive mechanism includes: a rotary drive member mounted on the top end of the first sleeve; a lead screw, one end of which is connected to the drive end of the rotary drive member and located on the central axis of the first sleeve, with a telescopic signal transmission line wound around the outer periphery of the lead screw; a lead screw nut, which is driven and connected to the lead screw, and a water level detection element is mounted on the lead screw nut.

[0013] In some embodiments, the water level detection device further includes: a second sleeve, coaxially sleeved on the outer periphery of the first sleeve, forming an annular space between the first sleeve and the second sleeve, and the peripheral wall of the second sleeve having multiple water inlet grids in the vertical direction, the multiple water inlet grids being staggered in the vertical direction.

[0014] In some implementations, a water level indicator is provided on the outer wall of the second casing in the vertical direction.

[0015] A second aspect of the present invention provides an agricultural testing device, comprising: the water level detection device described above; and a moisture content detection device, installed at the bottom of the water level detection device and communicatively connected to a control module, wherein the moisture content detection device is used to insert into the soil, and the moisture content detection device is used to detect the moisture content in the soil and send a second detection signal to the control module.

[0016] In some embodiments, the bottom of the first casing is detachably connected to an adapter frame, and the moisture content detection device includes: a buried pipe with a second receiving cavity, the buried pipe being detachably connected to the adapter frame; and a moisture content detection sensor installed in the second receiving cavity for detecting the moisture content of the soil and sending a second detection signal.

[0017] In some embodiments, the inner peripheral wall of the first sleeve is further provided with a mounting groove extending in the vertical direction. The moisture content detection device also includes: a converter circuit board disposed on the side opposite to the first sleeve, the converter circuit board being used to receive the second detection signal emitted by the moisture content detection sensor; and a data transmission line, one end of which is connected to the converter circuit board and the other end of which is connected to the control module, the data transmission line being embedded in the mounting groove and used to transmit the second detection signal emitted by the converter circuit board to the control module.

[0018] In some implementations, there are multiple moisture content detection sensors, which are arranged at intervals along the vertical direction and used to detect the moisture content of soil at different depths.

[0019] A third aspect of the present invention provides a control method for an agricultural testing device. This control method is used with the aforementioned agricultural testing device and includes the following steps: determining the required testing items for the soil; when soil water level needs to be tested, controlling a linear drive mechanism to drive a water level detection element to move downwards from the top of a first sleeve and acquiring a first detection signal in real time; determining the soil water level based on the first detection signal; when soil moisture content needs to be tested, inserting the agricultural testing device into a preset depth in the soil and acquiring a second detection signal; and determining the soil moisture content based on the second detection signal.

[0020] In some embodiments, the step of determining the soil water level based on the first detection signal includes: determining a plurality of dielectric constants corresponding to each first detection signal; determining the moisture content corresponding to each height of the outer periphery of the first sleeve based on the plurality of dielectric constants; and determining the soil water level based on the moisture content.

[0021] The aforementioned water level detection device includes a first sleeve, a linear drive mechanism, a water level detection element, and a control module. The first sleeve has a first receiving cavity. The first sleeve is used to install on the horizontal surface of the object to be detected and extends in the vertical direction. The linear drive mechanism is installed at the top of the first receiving cavity. The movable end of the linear drive mechanism is disposed away from the top of the first receiving cavity. The movable end of the linear drive mechanism is equipped with a water level detection element. The water level detection element can detect the humidity of the outer periphery of the first sleeve and send a first detection signal to the control module. The control module is installed on the first sleeve and is communicatively connected to both the water level detection element and the linear drive mechanism. The control module can control the linear drive mechanism to drive the water level detection element to move and acquire the first detection signal detected by the water level detection element in real time. The control module can determine the water level of the object to be detected based on the first detection signal. Using the above-mentioned water level detection device, the linear drive can drive the water level detection element vertically, and the water level detection element can detect the humidity at different heights on the outer periphery of the first sleeve. It can detect the water level at different heights with just one water level detection element, which is accurate and low cost. In addition, the water level detection element is set in the first receiving cavity, which can be protected from the influence of the external environment, and the water level detection element has a long service life.

[0022] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. Those skilled in the art can obtain other drawings based on the structures shown in these drawings without any inventive effort. In the drawings:

[0024] Figure 1 This is a cross-sectional schematic diagram of an agricultural testing device provided according to an embodiment of the present invention;

[0025] Figure 2 This is a front view of an agricultural testing device provided according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of an agricultural testing device according to another embodiment of the present invention;

[0027] Figure 4 This is a flowchart of a control method for an agricultural testing device provided according to an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures

[0029] 1 Control Module

[0030] 2 Second casing

[0031] 3 Rotary drive components

[0032] 4 First casing

[0033] 5. Couplings

[0034] 6 First Bearing

[0035] 7. Lead screw

[0036] 8. Retractable signal transmission line

[0037] 9. Lead screw nut

[0038] 10 Second Bearing

[0039] 11 Adapter

[0040] 12 Adapter Circuit Boards

[0041] 13 Circuit connectors

[0042] 14 Moisture content detection sensor

[0043] 15 underground pipes

[0044] 16 Sensor Circuit Board

[0045] 17 Water level detection components

[0046] 18 Sleeve Fixing Bracket

[0047] 19 Threaded bracket

[0048] 20 Positioning Bracket

[0049] 21. Inlet grating

[0050] 22 Water level markers Detailed Implementation

[0051] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0052] The water level detection device, agricultural detection equipment, and control method thereof according to the present invention are described below with reference to the accompanying drawings.

[0053] like Figure 1 The image shown is a cross-sectional schematic diagram of an agricultural testing device provided according to an embodiment of the present invention; as shown... Figure 2 The image shown is a front view of an agricultural testing device provided according to an embodiment of the present invention. The water level detection device provided in this embodiment can be applied to agricultural testing equipment. The water level detection device provided in this embodiment includes:

[0054] The first sleeve 4 extends vertically and is used to install on the horizontal surface of the object to be tested. The first sleeve 4 has a closed first receiving cavity (not shown in the figure).

[0055] A linear drive mechanism is installed at the top of the first receiving cavity;

[0056] A water level detection element 17 is installed on the movable end of the linear drive mechanism and is disposed away from the top of the first receiving cavity. The water level detection element 17 is used to detect the humidity of the outer periphery of the first sleeve 4 and send out a first detection signal.

[0057] Control module 1 is installed on the first sleeve 4 and is communicatively connected to the water level detection element 17. The control module 1 is configured to: control the linear drive mechanism to drive the water level detection element 17 to move and acquire the first detection signal in real time; and determine the water level of the object to be detected based on the first detection signal.

[0058] The cultivation of crops such as rice requires the water level above the soil to be maintained at a preset height. If the water level is too low or too high, it will affect crop growth. This invention provides a water level detection device capable of detecting the water level above the soil. Most existing water level detection devices use laser detection, which is easily obstructed by crops, weeds, and other obstacles, affecting detection accuracy. This invention determines the water level by directly detecting the humidity of the outer perimeter of the first sleeve 4, resulting in more accurate detection.

[0059] Specifically, the water level detection device provided in this embodiment of the invention includes a first sleeve 4, a linear drive mechanism, a water level detection element 17, and a control module 1. The first sleeve 4 has a closed first receiving cavity. The first sleeve 4 is used to install on the horizontal surface of the object to be detected and extends in the vertical direction. The object to be detected can be soil, sand, lake, etc. The linear drive mechanism is installed at the top of the first receiving cavity, and the movable end of the linear drive mechanism is set away from the top of the first receiving cavity. The water level detection element 17 is installed at the movable end of the linear drive element. The water level detection element 17 can detect the humidity of the outer periphery of the first sleeve 4 and send a first detection signal to the control module 1. The control module 1 can determine the humidity corresponding to different heights of the outer periphery of the first sleeve 4 based on the first detection signal, thereby obtaining the water level of the object to be detected.

[0060] Using the aforementioned water level detection device, the water level detection element 17 can be driven by a linear drive mechanism to detect the moisture level at different heights around the outer periphery of the first sleeve 4, thereby obtaining the moisture level of the object under test. The testing process is not affected by external crops, weeds, etc., and the test results are accurate and the testing cost is low. Furthermore, the water level detection element 17 is installed in a closed first receiving cavity, and it will not be corroded by the external environment during operation, resulting in a long service life for the water level detection element 17.

[0061] In one embodiment, the water level detection element 17 is a capacitive sensor, with its detection end slidingly abutting against the inner peripheral wall of the first sleeve 4. The capacitance values ​​of the metal differ between wet and dry states, and the capacitive sensor can detect these capacitance values. In this embodiment, the detection end of the capacitive sensor slides against the inner wall of the first sleeve 4. During the up-and-down movement of the capacitive sensor driven by the linear drive element, the capacitive sensor can detect the capacitance values ​​at different heights of the first sleeve 4. When the outer periphery of the first sleeve 4 is wet, the capacitance value detected by the capacitive sensor differs from that when it is dry. The capacitive sensor can send a first detection signal based on the detection result. The control module 1 can determine whether the outer periphery of the first sleeve 4 at each height is wet based on the first detection signal, and further determine the water level of the object to be measured.

[0062] In one embodiment, such as Figure 1 As shown, the water level detection device also includes a telescopic signal transmission line 8, which is flexibly connected between the water level detection element 17 and the control module 1 and is used to transmit the first detection signal to the control module 1. The telescopic signal transmission line 8 enables signal transmission between the water level detection element 17 and the control module 1. During the vertical movement of the linear drive mechanism driving the water level detection element 17, the telescopic signal transmission line 8 can extend and retract, preventing the telescopic signal transmission line 8 from interfering with the movement of the linear drive mechanism.

[0063] In one embodiment, such as Figure 1As shown, the linear drive mechanism includes: a rotary drive component 3 (e.g., a motor), a lead screw 7, and a lead screw nut 9. The rotary drive component 3 is mounted on the top end of the first sleeve 4. One end of the lead screw 7 is connected to the drive end of the rotary drive component 3 and is located on the central axis of the first sleeve 4. A telescopic signal transmission line 8 is wound around the outer circumference of the lead screw 7. The lead screw nut 9 is drivenly connected to the lead screw 7. The water level detection component 17 is mounted on the lead screw nut 9. The combination of the rotary drive component 3 and the lead screw nut 9 allows for a smoother and more economical up-and-down drive of the water level detection component 17. Furthermore, the telescopic signal transmission line 8 is wound around the outer circumference of the lead screw 7. During the up-and-down movement of the lead screw nut 9 along the lead screw 7, the telescopic signal transmission line 8, the lead screw nut 9, and the lead screw 7 do not interfere with each other, making the movement of the lead screw nut 9 more stable.

[0064] In one embodiment, such as Figure 1 As shown, the linear drive mechanism also includes a coupling 5 connected between the rotary drive 3 and the lead screw 7, which can transmit the rotational force of the rotary drive 3 to the lead screw 7.

[0065] In one embodiment, such as Figure 1 As shown, the coupling 5 has a receiving groove at the bottom. The inner circumferential wall of the receiving groove slides with the outer ring of the first bearing 6, and the top of the lead screw 7 slides with the inner ring of the first bearing 6. The first bearing 6 can better transmit the rotational torque to the lead screw 7, drive the lead screw 7 to rotate, and the first bearing 6 can make the lead screw 7 more accurately positioned and extend the service life of the linear drive mechanism.

[0066] The aforementioned water level detection device determines the water level based on the degree of moisture on the outer periphery of the first sleeve 4. However, this detection device will fail in rainy weather, as rain will wet the outer periphery of the first sleeve 4, thus making the detection results inaccurate. Therefore, in one embodiment, as... Figure 1 and Figure 2 As shown, the water level detection device also includes a second sleeve 2, which is coaxially sleeved around the outer periphery of the first sleeve 4, forming an annular space between the first sleeve 4 and the second sleeve 2. Multiple water inlet grids 21 are vertically arranged on the peripheral wall of the second sleeve 2, and these grids are staggered vertically. The second sleeve 2 prevents rainwater from wetting the outer periphery of the first sleeve 4, and the annular space between the second sleeve 2 and the first sleeve 4 contains liquid. When the water level rises, water can enter the annular space through the water inlet grids 21, wetting the outer periphery of the first sleeve 4, thus facilitating water level detection by the water level detection element 17. Furthermore, the second sleeve 2 protects the first sleeve 4 and its internal components, reducing the corrosive effects of the external environment on the first sleeve 4. The staggered arrangement of the multiple water inlet grids 21 prevents debris from accumulating on the same vertical plane and clogging the grids, ensuring that the external water level remains consistent with the water level in the annular space.

[0067] In one embodiment, the water inlet grid 21 is arranged as follows: Figure 2 As shown, the inlet grid 21 is elongated and extends along the axial direction of the second sleeve 2. Multiple inlet grids 21 are evenly arranged circumferentially at the same height, and the inlet grids 21 at adjacent heights are staggered circumferentially. This arrangement method can ensure that the water flow in all directions is uniform, and that the water level in the annular space is the same as the water level outside the second sleeve 2.

[0068] In one embodiment, the bottom of the lowest water inlet grid 21 is at the same height as the zero mark of the water level indicator 22. When the water level detection device is installed on the object to be detected, the zero mark, the ground surface, and the bottom of the lowest water inlet grid 21 are at the same height, so that the water in the annular space can flow out completely after the surface water level drops.

[0069] In one embodiment, such as Figure 2 As shown, a water level indicator 22 is provided vertically on the outer wall of the second sleeve 2. The water level indicator 22 may include a water level indicator line and water level indicator characters. Providing the water level indicator 22 vertically on the outer wall of the second sleeve 2 allows users to easily observe the water level and compare the detected water level with the observed water level to test the detection accuracy of the water level detection device.

[0070] In one embodiment, such as Figure 1 As shown, the water level detection device also includes a threaded bracket 19, the bottom end of which is provided with an external thread. The threaded bracket 19 is threadedly connected to the second sleeve 2, and the control module 1 is sleeved on the top end of the threaded bracket 19. This installation structure allows for a detachable connection between the second sleeve 2 and the control module 1, facilitating the replacement of components within the second sleeve 2.

[0071] In one embodiment, such as Figure 1As shown, the threaded bracket 19 has a cylindrical structure and an installation cavity. A limiting part is provided on the inner wall of the installation cavity. The water level detection device also includes a positioning bracket 20 and a sleeve fixing bracket 18. The positioning bracket 20 is installed in the installation cavity and engaged with the limiting part, and is used to seal the top of the first receiving cavity. The sleeve fixing bracket 18 is detachably installed at the bottom of the positioning bracket 20. The sleeve fixing bracket 18 is inserted into the cavity of the second sleeve 2 and detachably connected to the first sleeve 4. The sleeve fixing bracket 18 is used to position and install the second sleeve 2. A sealing ring is provided at the connection between the sleeve fixing bracket 18 and the first sleeve 4. The sealing ring can seal the gap between the sleeve fixing bracket 18 and the first sleeve 4, making the first receiving cavity a closed cavity, preventing liquid in the second sleeve 2 from entering the first receiving cavity through the gap between the sleeve fixing bracket 18 and the first sleeve 4. The above-mentioned water level detection device is easy to disassemble, maintain, and repair.

[0072] In one embodiment, when the second sleeve 2 is not provided outside the first sleeve 4, the first sleeve 4 is detachably connected to the control module 1 alone, and the control module 1 is placed on the top of the first sleeve 4 to seal the top of the first receiving cavity.

[0073] In one embodiment, the control module 1 includes a processing unit (not shown in the figure) and a communication unit (not shown in the figure). After determining the water level of the object to be detected, the processing unit transmits the data to the communication unit, and the communication unit transmits the water level data to the user terminal so that the user can remotely view the water level data.

[0074] In one embodiment, such as Figure 1 As shown, an agricultural testing device is provided, including a moisture content detection device and the aforementioned water level detection device. The moisture content detection device is installed at the bottom of the water level detection device and is communicatively connected to a control module 1. The moisture content detection device is used to insert into the soil to detect the moisture content in the soil and send a second detection signal to the control module 1. Crops such as rice require not only monitoring the surface water level but also the moisture content in the soil to facilitate precise irrigation and improve crop yield. Therefore, this embodiment of the invention provides an agricultural testing device, including the aforementioned water level detection device and moisture content detection device. The moisture content detection device can be inserted into the soil to detect the soil moisture content and send a second detection signal to the control module 1. The processing unit of the control module 1 calculates the soil moisture content data and can transmit it to the communication unit. The communication unit can remotely transmit the moisture content data to the user terminal. The above-mentioned agricultural testing equipment can not only detect the surface water level of the soil, but also detect the moisture content of the underground soil. Furthermore, the moisture content detection device and the water level detection device share a single control module 1. Compared with separate devices for detecting water level and moisture content, it is lower in cost and has a wider range of applications.

[0075] In one embodiment, the bottom of the first sleeve 4 is detachably connected to an adapter frame 11. The moisture content detection device includes a buried pipe 15 and a moisture content detection sensor 14. The buried pipe 15 has a second receiving cavity (not shown in the figure), and the buried pipe 15 is detachably connected to the adapter frame 11. The buried pipe 15 can be inserted into the soil and protects the moisture content detection sensor 14 inside the buried pipe 15. The moisture content detection sensor 14 is used to detect the moisture content of the soil and send a second detection signal. The adapter frame 11 can seal the bottom of the first receiving cavity inside the first sleeve 4, and the adapter frame 11 can be used to connect the buried pipe 15 and the first sleeve 4, so that the moisture content detection device and the buried pipe 15 can be detachably connected. When the surface moisture content of the object to be tested needs to be detected, the moisture content detection device can be separated from the adapter frame 11, which is convenient for disassembly and assembly.

[0076] In one embodiment, the top of the adapter 11 is also provided with a bearing mounting groove, the inner wall of the bearing mounting groove is slidably connected to the outer wall of the second bearing 10, and the end of the lead screw 7 away from the rotary drive 3 is slidably connected to the inner wall of the second bearing 10.

[0077] In one embodiment, such as Figure 3 The diagram shown is a structural schematic of an agricultural testing device according to another embodiment of the present invention. The bottom of the adapter frame 11 is only connected to a buried pipe 15. Inserting the buried pipe 15 into the soil makes it relatively easy to install and position the moisture content testing device, and the cost is low, thus meeting the user's need for moisture content testing only.

[0078] In one specific embodiment, the underground pipe 15 and the adapter frame 11 are connected by threads, which facilitates the disassembly and maintenance of the moisture content detection device.

[0079] In one embodiment, such as Figure 1 As shown, the inner circumferential wall of the first sleeve 4 is also provided with a mounting groove extending vertically. The moisture content detection device also includes a converter circuit board 12 and a data transmission line (not shown in the figure). The converter circuit board 12 is disposed on the side opposite to the first sleeve 4. The converter circuit board 12 is used to receive the second detection signal emitted by the moisture content detection sensor 14 and transmit it to the data transmission line. One end of the data transmission line is connected to the converter circuit board 12, and the other end of the data transmission line is connected to the control module 1. The data transmission line is embedded in the mounting groove and is used to transmit the second detection signal emitted by the converter circuit board 12 to the control module 1. By using the above-mentioned agricultural detection equipment, the second detection signal emitted by the moisture content detector can be transmitted to the control module 1 more stably. Furthermore, the data transmission line is embedded in the mounting groove and will not affect the normal operation of the water level detection module.

[0080] In one embodiment, the agricultural testing equipment further includes a sensor circuit board 16 disposed at the bottom of the adapter circuit board 12. The sensor circuit board 16 is communicatively connected to multiple moisture content detection sensors 14. The sensor circuit board 16 and the adapter circuit board 12 are connected through a circuit connector 13. The sensor circuit board 16 is used to control the moisture content detection sensors 14 to detect the moisture content in the soil.

[0081] In one embodiment, there are multiple moisture content detection sensors 14, which are arranged vertically at intervals and used to detect the moisture content of soil at different depths. Furthermore, the moisture content detection sensors 14 are detachably connected to the buried pipe 15, allowing the user to selectively arrange one or more moisture content detection sensors 14 according to their needs.

[0082] In one embodiment, a depth marker (e.g., a depth scale line) is provided on the outer periphery of the buried pipe 15. By observing the depth marker, it can be determined whether the agricultural detection equipment is buried at a preset depth.

[0083] In one embodiment, a control method for an agricultural detection device is provided, such as... Figure 4 The diagram shows a flowchart of a control method for an agricultural testing device according to an embodiment of the present invention. This control method is used in the aforementioned agricultural testing device and includes the following steps:

[0084] S101, Determine the required testing items for the soil;

[0085] S102, when it is necessary to detect the water level in the soil, the linear drive mechanism is controlled to drive the water level detection element 17 to move downward from the top of the first sleeve 4 and acquire the first detection signal in real time.

[0086] S103, determine the soil water level based on the first detection signal;

[0087] S104, When it is necessary to detect the soil moisture content, the agricultural detection device is inserted into the soil at a preset depth and a second detection signal is obtained;

[0088] S105, determine the soil moisture content based on the second detection signal.

[0089] When the agricultural testing equipment is used to test the soil, the control module 1 can acquire the items that need to be tested. When it is necessary to test the soil water level, the control module 1 controls the linear drive mechanism to drive the water level detection element 17 to move downward from the top of the first sleeve 4 and acquire the first detection signal in real time. The control module 1 can acquire multiple first detection signals and compare the multiple first detection signals to obtain the soil water level. When it is necessary to test the soil moisture content, the user can insert the agricultural testing equipment into the soil at a preset depth (for example, the zero mark of the water level indicator 22 is flush with the soil surface). After insertion, the control module 1 can acquire the second detection signal and determine the soil moisture content based on the second detection signal.

[0090] In one embodiment, the step of determining the soil water level based on a first detection signal includes: determining multiple dielectric constants corresponding to each first detection signal; determining the moisture content corresponding to each height of the outer periphery of the first sleeve 4 based on the multiple dielectric constants; and determining the soil water level based on the moisture content. This embodiment of the invention uses a capacitive sensor to determine the soil water level. The capacitive sensor can detect the capacitance value of the wall of the first sleeve 4 and convert it into a first detection signal, which is transmitted to the control module 1. The control module 1 can determine the dielectric constant of the first sleeve 4 corresponding to each capacitance value based on the first detection signal. The control module 1 can determine the moisture content corresponding to each height of the outer periphery of the first sleeve 4 based on the dielectric constant, thereby determining the soil water level. Using the above control method, the soil water level can be accurately and quickly determined, thereby controlling whether the corresponding irrigation equipment performs soil irrigation to improve crop yield.

[0091] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0092] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0093] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0094] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A water level detection device, characterized in that, include: The first sleeve (4) has a closed first receiving cavity. The first sleeve (4) is used to be installed on the horizontal surface of the object to be tested and extends in the vertical direction. A linear drive mechanism is installed at the top of the first receiving cavity; A water level detection element (17) is installed on the movable end of the linear drive mechanism and is disposed away from the top of the first receiving cavity. The water level detection element (17) is used to detect the humidity of the outer periphery of the first sleeve (4) and send out a first detection signal. The control module (1) is installed on the first sleeve (4) and is communicatively connected to both the water level detection element (17) and the linear drive mechanism. The control module (1) is configured as follows: The linear drive mechanism is controlled to drive the water level detection element (17) to move and acquire the first detection signal in real time; The water level of the object to be detected is determined based on the first detection signal.

2. The water level detection device according to claim 1, characterized in that, The water level detection element (17) is a capacitive sensor, and the detection end of the capacitive sensor slides against the inner peripheral wall of the first sleeve (4).

3. The water level detection device according to claim 1, characterized in that, The water level detection device also includes: A telescopic signal transmission line (8) is elastically connected between the water level detection device (17) and the control module (1) and is used to transmit the first detection signal to the control module (1).

4. The water level detection device according to claim 3, characterized in that, The linear drive mechanism includes: A rotary drive (3) is installed at the top of the first sleeve (4); One end of the lead screw (7) is connected to the driving end of the rotary drive (3) and is located on the central axis of the first sleeve (4). The telescopic signal transmission line (8) is wound around the outer periphery of the lead screw (7). A lead screw nut (9) is driven to the lead screw (7), and the water level detection component (17) is installed on the lead screw nut (9).

5. The water level detection device according to claim 1, characterized in that, The water level detection device also includes: The second sleeve (2) is coaxially sleeved on the outer periphery of the first sleeve (4), and an annular space is formed between the first sleeve (4) and the second sleeve (2). The peripheral wall of the second sleeve (2) is provided with a plurality of water inlet grids (21) in the vertical direction, and the plurality of water inlet grids (21) are arranged alternately in the vertical direction.

6. The water level detection device according to claim 5, characterized in that, The second sleeve (2) has a water level mark (22) on its outer wall in the vertical direction.

7. An agricultural testing device, characterized in that, include: The water level detection device according to any one of claims 1 to 6; A moisture content detection device is installed at the bottom of the water level detection device and is communicatively connected to the control module (1). The moisture content detection device is used to insert into the soil and to detect the moisture content in the soil and send a second detection signal to the control module (1).

8. The agricultural testing equipment according to claim 7, characterized in that, The first sleeve (4) is detachably connected to an adapter (11) at its bottom. The moisture content detection device includes: The underground pipe (15) has a second receiving cavity and is detachably connected to the adapter (11). A moisture content detection sensor (14) is installed in the second receiving cavity and is used to detect the moisture content of the soil and send a second detection signal.

9. The agricultural testing equipment according to claim 8, characterized in that, The inner circumferential wall of the first sleeve (4) is also provided with an installation groove extending in the vertical direction, and the moisture content detection device further includes: The adapter circuit board (12) is disposed on the side opposite to the first sleeve (4), and the adapter circuit board (12) is used to receive the second detection signal emitted by the moisture content detection sensor (14); A data transmission line, one end of which is connected to the adapter circuit board (12) and the other end of which is connected to the control module (1). The data transmission line is embedded in the mounting slot and is used to transmit the second detection signal emitted by the adapter circuit board (12) to the control module (1).

10. The agricultural testing equipment according to claim 8, characterized in that, The number of the moisture content detection sensors (14) is multiple, and the multiple moisture content detection sensors (14) are arranged at intervals in the vertical direction and are used to detect the moisture content of the soil at different depths.

11. A control method for agricultural testing equipment, characterized in that, The control method is used in the agricultural testing equipment according to any one of claims 7 to 10, and the control method includes the following steps: Determine the required testing items for the soil; When it is necessary to detect the water level of the soil, the linear drive mechanism is controlled to drive the water level detection element (17) to move downward from the top of the first sleeve (4) and acquire the first detection signal in real time. The soil water level is determined based on the first detection signal; When it is necessary to detect the moisture content of the soil, the agricultural detection device is inserted into the soil at a preset depth and a second detection signal is obtained; The soil moisture content is determined based on the second detection signal.

12. The control method for the agricultural testing equipment according to claim 11, characterized in that, The step of determining the soil water level based on the first detection signal includes: Determine multiple dielectric constants corresponding to each of the first detection signals; The moisture content corresponding to each height of the outer periphery of the first sleeve (4) is determined based on the multiple dielectric constants. The soil water level is determined based on the moisture content.

Images