A drought monitoring device

Abstract

The present invention discloses a drought monitoring device, which belongs to the field of soil detection technology and includes a probe rod and a force rod. The probe rod includes: a core rod, including a rod body and a plug-in end arranged at one end of the rod body; a shaft sleeve, which is detachably fixedly connected to the rod body, and is sleeved on the rod body at intervals of at least two, and cooperates with the circumferential limit of the rod body; a rigid sleeve, including a plurality of sleeves sleeved on the core rod at intervals different from the shaft sleeves, and a mounting hole for arranging a humidity sensor is provided on the side wall; a heat-insulating sleeve, which is sleeved on the core rod and is arranged between two adjacent rigid sleeves and between the rigid sleeve and the shaft sleeve. Through the above-mentioned arrangement, the speed of heat transfer between the rigid sleeve and the outside of the soil can be reduced. During operation, the difference between the temperature of the rigid sleeve and the surrounding soil is reduced, thereby reducing the probability of condensation water forming on the surface of the rigid sleeve, reducing the probability of drought monitoring results being affected by the formation of condensation water, and reducing the error of drought monitoring results.

Description

Technical Field

[0001] The present invention relates to the technical field of soil monitoring, and in particular to a drought monitoring device. Background Art

[0002] Drought monitoring is currently commonly carried out using remote sensing technology. Remote sensing technology can quickly obtain drought information over large areas. However, due to spatial resolution limitations, remote sensing technology is difficult to accurately detect small-scale farmland or local droughts. Based on this, drought monitoring devices are currently used in existing technologies to monitor small-scale farmland or local drought conditions.

[0003] For example, the Chinese invention patent with application number: 2022116603910 discloses a drought monitoring device based on soil moisture conditions, which can predict local drought conditions by analyzing local soil moisture conditions and can monitor drought in a small area of farmland. However, it also has the following problems: the above-mentioned device uses a probe rod inserted into the ground to a certain depth, and uses a detection probe set on the probe rod to detect the humidity inside the soil, and predict the degree of drought based on the soil moisture, and requires long-term monitoring. When the temperature difference between day and night is large or the difference between the outside temperature and the soil temperature is large, the probe rod and the outside heat conduction temperature drop, causing the moisture in the soil to condense on the surface of the probe rod, thereby causing the soil humidity near the probe rod to be high, which will affect the accuracy of soil moisture detection, thereby causing errors in the drought monitoring results. Summary of the Invention

[0004] The object of the present invention is to solve the above problems and provide a drought monitoring device.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is: a drought monitoring device, comprising a probe rod and a force-applying rod, wherein the probe rod comprises:

[0006] The core rod comprises a rod body and a plug-in end provided at one end of the rod body;

[0007] A shaft sleeve is detachably fixedly connected to the rod body, comprising at least two sleeves spaced apart on the rod body and engaging with the rod body in a circumferential limiting manner;

[0008] The rigid sleeve comprises a plurality of sleeves spaced apart from the shaft sleeve and sleeved on the core rod, and a mounting hole for arranging the humidity sensor is provided on the side wall;

[0009] The heat-insulating sleeve is sleeved on the core rod and is arranged between two adjacent rigid sleeves and between the rigid sleeve and the shaft sleeve.

[0010] Furthermore, at least one heat exchange channel is provided on the side wall of the rigid sleeve, and a plurality of moisture absorption components corresponding to the plurality of rigid sleeves are provided on the side wall of the core rod. The moisture absorption components include at least one radial hole corresponding to the heat exchange channel, and a water absorbent is provided in the radial hole.

[0011] Furthermore, an inner cavity is axially provided in the core rod, the radial hole is communicated with the inner cavity, and the inner cavity is provided with a ventilation component.

[0012] Furthermore, the heat exchange channel is arranged obliquely from one end away from the core rod to one end close to the core rod, and is arranged in a direction close to the plug end.

[0013] Furthermore, the ventilation component includes a bracket arranged in the inner cavity, the bracket includes a rigid trachea extending into the inner cavity, and a plurality of containers arranged at intervals on the rigid trachea, the plurality of containers corresponding one-to-one to the plurality of rigid sleeves, and when the bracket is arranged in the inner cavity, each container is located below the corresponding radial hole, the lower end of the rigid trachea extends to the bottom of the container, and the top of each container is used to set a water-absorbing material.

[0014] Furthermore, it also includes a pump body, and the upper end of the rigid air tube and the upper end of the inner cavity are respectively connected to the pump inlet and pump outlet of the pump body.

[0015] Furthermore, a drying chamber is provided on the circulating air path of the pump body.

[0016] Furthermore, a heat-insulating lining is provided between the rigid sleeve and the core rod.

[0017] Furthermore, the outer circumference of the core rod is provided with at least one strip-shaped rib, and the inner circumferences of the shaft sleeve, the heat-insulating sleeve and the rigid sleeve are all provided with keyways adapted to the rib.

[0018] Furthermore, along the axial direction, it also includes an insertion rod that passes through the shaft sleeve, the insulation sleeve, the rigid sleeve and the plug-in end in sequence. The number of the insertion rods is equal to the number of heat exchange channels on each rigid sleeve and corresponds one to one. When the insertion rods are in the plugged state, the insertion rods block the heat exchange channels.

[0019] The drought monitoring device disclosed in the present invention has the following beneficial effects compared with the prior art: by adopting a connection method in which a core rod, a heat insulating sleeve, a rigid sleeve, a first shaft sleeve and a second shaft sleeve are matched with each other for the probe rod, the speed of heat transfer between the rigid sleeve and the outside of the soil can be reduced. During operation, the temperature difference between the rigid sleeve and the surrounding soil is reduced, thereby reducing the probability of condensation water forming on the surface of the rigid sleeve, reducing the probability of drought monitoring results being affected by the formation of condensation water, and reducing the error in the drought monitoring results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1The figure is a schematic diagram of the overall structure of a drought monitoring device of the present invention.

[0021] Figure 2 The figure is a schematic diagram of the overall structure of a probe rod and a force-applying rod in a drought monitoring device of the present invention.

[0022] Figure 3 The figure is a schematic diagram of the axial structure of a probe rod and a force-applying rod in a drought monitoring device of the present invention.

[0023] Figure 4 for Figure 3 The figure shows a schematic cross-sectional structure diagram of a drought monitoring device according to the present invention at point AA.

[0024] Figure 5 for Figure 4 The diagram shows a partially enlarged structural diagram of point B in the present invention.

[0025] Figure 6 Schematic diagram of the structure of the probe rod in a drought monitoring device of the present invention Figure 1 .

[0026] Figure 7 Schematic diagram of the structure of the probe rod in a drought monitoring device of the present invention Figure 2 .

[0027] Figure 8 The figure is a schematic structural diagram of a force-applying rod in a drought monitoring device of the present invention.

[0028] Figure 9 The figure is a schematic diagram of the axial structure of a probe rod in a drought monitoring device of the present invention.

[0029] Figure 10 for Figure 9 The figure shows a schematic cross-sectional structure diagram of a probe rod at EE in a drought monitoring device of the present invention.

[0030] Figure 11 This is a schematic structural diagram of a core rod in a drought monitoring device of the present invention.

[0031] Figure 12 for Figure 11 The diagram shows a partial enlarged structural diagram of point D in the present invention.

[0032] Figure 13 This is a schematic diagram of the structure of the shaft sleeve and thermal insulation sleeve in a drought monitoring device of the present invention. Figure 1 .

[0033] Figure 14 This is a schematic diagram of the structure of the shaft sleeve and thermal insulation sleeve in a drought monitoring device of the present invention. Figure 2 .

[0034] Figure 15Schematic diagram of the structure of a rigid sleeve in a drought monitoring device of the present invention Figure 1 .

[0035] Figure 16 Schematic diagram of the end face structure of a rigid sleeve in a drought monitoring device of the present invention Figure 2 .

[0036] Figure 17 for Figure 16 The figure shows a schematic cross-sectional structure diagram of a rigid sleeve at FF in a drought monitoring device of the present invention.

[0037] Figure 18 for Figure 16 The figure shows a schematic cross-sectional structure diagram of a drought monitoring device of the present invention, which is rigidly sleeved at GG.

[0038] Figure 19 The figure is a schematic structural diagram of a bracket in a drought monitoring device of the present invention.

[0039] Figure 20 The figure is a schematic structural diagram of an insertion rod in a drought monitoring device of the present invention.

[0040] In the figure: 1, force rod; 10, connecting flange; 11, plug-in cavity; 111, air duct; 115, seal; 12, first wire hole; 121, wire outlet; 122, vent; 2, probe rod; 21, first sleeve; 210, first threaded hole; 211, first plug-in channel; 2110, receiving groove; 213, first countersunk hole; 22, thermal insulation sleeve; 221, third plug-in channel; 23, rigid sleeve; 231, second plug-in channel; 232, heat exchange channel; 233, thermal insulation lining; 234, mounting hole; 25, second sleeve; 250, second countersunk hole; 251, locking screw; 26, core rod; 260, plug-in end; 2600, plug-in hole; 261, rib; 262, inner Cavity; 2621, mounting groove; 263, radial hole; 27, bracket; 271, rigid air pipe; 272, first air permeable plate; 2720, air hole; 273, container; 2730, second air permeable plate; 28, plug rod; 280, end plate; 281, second threaded hole; 29, water absorbent; 3, wire harness channel; 31, second wire delivery hole; 32, third wire delivery hole; 33, fourth wire delivery hole; 4, first switching valve; 5, photovoltaic panel; 51, energy storage unit; 61, drying chamber; 610, first air inlet; 611, first air outlet; 612, second air inlet; 62, filter chamber; 7, solenoid valve; 8, pump body; 81, second switching valve; 82, first temperature sensor; 83, control device. DETAILED DESCRIPTION

[0041] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner, and thus only show components related to the present invention.

[0042] Example 1

[0043] Please refer to Figure 2 As a specific embodiment, the technical solution of the present application is: a drought monitoring device, including a probe rod 2 and a force-applying rod 1, wherein the probe rod 2 includes:

[0044] The core rod 26 includes a rod body and a plug end 260 provided at one end of the rod body;

[0045] A shaft sleeve, detachably fixedly connected to the rod body, with at least two sleeves spaced apart on the rod body and circumferentially limited with the rod body;

[0046] The rigid sleeve 23 includes a plurality of sleeves spaced apart from the shaft sleeve and sleeved on the core rod 26, and a mounting hole 234 for arranging the humidity sensor is provided on the side wall;

[0047] The heat-insulating sleeve 22 is sleeved on the core rod 26 and is disposed between two adjacent rigid sleeves 23 and between the rigid sleeve 23 and the shaft sleeve.

[0048] Specifically, the technical solution of this application is: including a core rod 26, referring to Figure 11 The core rod 26 includes a rod body and a plug end 260 provided at one end of the rod body. The plug end 260 is a tapered structure. The cross-sectional area of the tapered end surface is larger than the cross-sectional area of the rod body. Figure 2 、 Figure 6 、 Figure 7 Three sleeves are arranged at intervals on the rod body of the core rod 26, including a first sleeve 21 located at the end of the core rod 26 and two second sleeves 25 arranged at intervals between the first sleeve 21 and the plug-in end 260. The outer circumference of the first sleeve 21 is provided with a first countersunk hole 213, and the inner thread of the first countersunk hole 213 is connected to a locking rod; similarly, the outer circumference of the second sleeve 25 is provided with a second countersunk hole 250, and the second countersunk hole 250 is threadedly connected to a locking screw 251, and the first sleeve 21 and the second sleeve 25 are locked on the rod body of the core rod 26 through the first countersunk hole 213.

[0049] As a specific embodiment, two rigid sleeves 23 are provided on both sides of each second sleeve 25. The rigid sleeve 23 is made of stainless steel or PC material, and the core rod 26 is made of stainless steel. The rigid sleeve 23 and the second sleeve 25 are separated by an insulating sleeve 22. Figure 15 、 Figure 16 、 Figure 18The outer surface of the rigid sleeve 23 is provided with a mounting hole 234. The mounting hole 234 is a blind hole for installing the detection sensor. The rigid sleeve 23 is made of metal or PC material, preferably corrosion-resistant stainless steel to ensure strength, and can effectively protect the detection sensor when the probe rod 2 is inserted into the ground.

[0050] Further, refer to Figure 18 , a fourth wire transmission hole 33 is provided on the side wall of the rigid sleeve 23, Figure 13 、 Figure 14 A second wire transmission hole 31 and a third wire transmission hole are provided on the shaft sleeve and the heat insulation sleeve 22 corresponding to the fourth wire transmission hole 33. When installed on the core rod 26 to form the probe rod 2, the fourth wire transmission hole 33, the second wire transmission hole 31 and the third wire transmission hole 32 together form a wiring harness channel 3, and the wiring harness of the humidity sensor is laid through the wiring harness channel 3.

[0051] Specifically, in this application, the core rod 26 is made of corrosion-resistant stainless steel. Figure 4-Figure 8 The force rod 1 is a cylindrical structure with an external thread on the outer surface and a connecting flange 10 at the end. Figure 9 The first sleeve 21 is provided with a first threaded hole 210 adapted to the connecting flange 10, and is detachably fixedly connected to the first sleeve 21 through the connecting flange 10. The end of the force rod 1 is provided with a plug-in cavity 11, and the plug-in cavity 11 is plugged and driven with the end of the core rod 26. Specifically, the outer peripheral surface of the core rod 26 is provided with a strip-shaped rib 261, and the inner side wall of the plug-in cavity 11 is provided with a keyway adapted to the rib 261 to achieve transmission cooperation. Figure 8 A first wire transmission hole 12 corresponding to the wiring harness channel 3 is provided on the end face of the flange, and a wire outlet 121 corresponding to the first wire transmission hole 12 is provided on the outer peripheral surface of the force rod 1. When the force rod 1 is connected to the probe rod 2, the first wire transmission hole 12 is correspondingly connected to the end of the wiring harness channel 3.

[0052] As a specific embodiment, the thermal insulation sleeve 22 can be made of a material with a lower thermal conductivity than the rigid sleeve, such as rubber, plastic, thermal insulation cotton, silicate insulation material, or rigid foam polyurethane. Rigid foam polyurethane is preferred, and the shaft sleeve and rigid sleeve 23 are preferably made of PC. Through the above-described arrangement, the probe 2 uses a connection method in which the core rod 26, the thermal insulation sleeve 22, the rigid sleeve 23, and the first and second shaft sleeves 21 and 25 cooperate to reduce the rate of heat transfer between the rigid sleeve 23 and the soil. During operation, the temperature of the rigid sleeve 23 is substantially consistent with the temperature of the surrounding soil, thereby reducing the probability of condensation forming on the surface of the rigid sleeve 23, reducing the probability of drought monitoring results being affected by the formation of condensation, and reducing the error in the drought monitoring results.

[0053] During use, the probe rod 2 is assembled, and the detection sensor is installed in the mounting hole 234, and the wiring harness is discharged from the outlet 121 through the wiring harness channel 3 and connected to the external control device 83. The detection value of the detection sensor is analyzed by the control device 83 to obtain the soil moisture condition. The same as the background technology is that the force rod 1 is equipped with a mounting seat on the outside, and a handwheel is provided on the upper end of the force rod 1. The mounting seat is threadedly connected to the force rod 1. The force rod 1 is rotated by rotating the handwheel, thereby causing a displacement between the force rod 1 and the mounting seat to move the force rod 1 downward, pushing the probe rod 2 into the ground, and can drive the core rod 26 below to rotate. The rotation of the core rod 26 can reduce the resistance to insertion into the ground.

[0054] Example 2

[0055] It can be understood that by setting the probe rod 2 as a structure composed of a core rod 26, a sleeve body, a rigid sleeve 23 and an insulating sleeve 22, the heat conduction rate between the probe rod 2 and the outside world can be reduced. However, since the core rod 26 and the rigid sleeve 23 are both made of stainless steel, they also have a fast heat conduction path. Therefore, when the temperature difference between the inside and outside is large, the surface of the rigid sleeve 23 is likely to reach the dew point, and condensation water will be generated. In order to further reduce the probability of condensation water generation, as a specific implementation method, the difference between this embodiment and the embodiment is that the reference Figure 10 、 Figure 11 、 Figure 12 、 Figure 17 In response to the above problems, as a further improvement, the technical solution of the present application is: a drought monitoring device, wherein at least one heat exchange channel 232 is provided on the side wall of the rigid sleeve 23, and a plurality of moisture absorption components corresponding to the plurality of rigid sleeves 23 are provided on the side wall of the core rod 26, and the moisture absorption component includes at least one radial hole 263 provided in a one-to-one correspondence with the heat exchange channel 232, and a water absorption member 29 is provided in the radial hole 263.

[0056] Specifically, in this embodiment, a plurality of moisture absorbing components corresponding to the rigid sleeve 23 are provided on the rod body of the core rod 26, and at least one heat exchange channel 232 is provided on the rigid sleeve 23. Figure 10When the rigid sleeve 23 is set on the core rod 26, the heat exchange channel 232 is exposed on the surface of the core rod 26. The moisture absorption component includes a radial hole 263 in the area corresponding to the heat exchange channel 232 and a water absorbent member 29 arranged in the radial hole 263. The water absorbent member 29 can be made of a water-absorbing sponge, cotton and linen products, etc. Through the above arrangement, after the probe 2 is inserted into the ground, the heat exchange channel 232 is connected with the core rod 26, so that the air temperature inside the heat exchange channel 232 is close to the temperature of the core rod 26. When the temperature difference between the inside and the outside is large, the temperature inside the heat exchange channel 232 is lower than the temperature of the soil and the rigid sleeve 23. At this time, part of the water vapor in the soil will condense on the surface of the core rod 26 and in the heat exchange channel 232 through the heat exchange channel 232, and be absorbed by the water absorbent member 29 after condensation, thereby reducing the temperature of the core rod 26 around the rigid sleeve 23 below the humidity in the gas around the rigid sleeve 23, thereby reducing the probability of condensation water forming on the outer peripheral surface of the rigid sleeve 23 when the temperature difference between the inside and the outside is too large.

[0057] Specifically, it can be understood that the temperature generally has a large difference between day and night, such as the temperature in autumn and western regions; the absorbent part 29 is made of absorbent sponge and cotton and linen materials. When the temperature is high during the day, the water inside the absorbent part 29 can also be partially evaporated, so that it can work repeatedly for a long time underground and adapt to long-term monitoring requirements.

[0058] Furthermore, as a preferred embodiment, the core rod 26 is made of stainless steel, and the first sleeve 21, the second sleeve 25, and the rigid sleeve 23 are all made of PC. The core rod 26 is made of stainless steel, and the insulation sleeve is made of rubber or rigid foam polyurethane having a lower thermal conductivity than PC. The insulation lining 233 can also be made of rubber or rigid foam polyurethane.

[0059] Furthermore, as a preferred embodiment, in order to ensure the water absorption performance of the water absorbent member 29 and prevent the water absorbent member 29 from absorbing too much water and causing the condensed water to be diverted or evaporated into the soil again, an inner cavity 262 is axially provided in the core rod 26, and the radial hole 263 is connected to the inner cavity 262, and the inner cavity 262 is equipped with a ventilation component.

[0060] Specifically, refer to Figure 1 、 Figure 19 An inner cavity 262 is coaxially arranged inside the core rod 26, and a radial hole 263 is connected to the inner cavity 262. The end of the water-absorbing member 29 penetrates into the inner cavity 262. On the one hand, the water-absorbing member 29 can absorb water, and on the other hand, it can block the radial hole 263 to prevent external soil particles from rolling into the core rod 26. By arranging a ventilation component in the inner cavity 262, the inner cavity 262 can be ventilated to dry the inner cavity 262, thereby achieving the effect of drying the water-absorbing member 29. The specific structure of the ventilation component is referred to below.

[0061] Further, as a preferred embodiment, refer to Figure 10 、 Figure 15 、 Figure 17 、 Figure 18 The heat exchange channel 232 is arranged from one end away from the core rod 26 to the end close to the core rod 26, and is inclined toward the direction close to the plug end 260. Specifically, by setting the heat exchange channel 232 to be inclined, the condensed water is guided when it is generated, ensuring that the condensed water is absorbed by the water absorbing member 29 and preventing the condensed water from flowing out.

[0062] Further, as a specific implementation method, refer to Figure 1 、 Figure 5 、 Figure 6 、 Figure 19 The ventilation component includes a bracket 27 arranged in the inner cavity 262, the bracket 27 includes a rigid air tube 271 extending into the inner cavity 262, and a plurality of containers 273 arranged at intervals on the rigid air tube 271. The plurality of containers 273 correspond one-to-one to the plurality of rigid sleeves 23. When the bracket 27 is arranged in the inner cavity 262, each container 273 is located below the corresponding radial hole 263, and the lower end of the rigid air tube 271 extends to the bottom of the container 273. The top of each container 273 is used to place water-absorbing material.

[0063] Specifically, the bracket 27 includes a rigid air pipe 271, which is made of stainless steel or other materials. A plurality of containers 273 are integrally provided on the rigid air pipe 271. The containers 273 are also made of stainless steel and are connected to the rigid air pipe 271 by welding. Figure 5 、 Figure 19 , the upper end of the rigid air tube 271 is further provided with a first air permeable plate 272, and the end of the core rod 26 is provided with a mounting groove 2621 coaxial with the inner cavity 262. The first air permeable plate 272 is sleeved on the outer circumference of the rigid air tube 271 and can slide outside the rigid tube for position adjustment. When adjusted to the appropriate position, a locking screw is used to lock it. When the bracket 27 is set in the inner cavity 262, the first air permeable plate 272 is set in the mounting groove 2621. Figure 10 At this time, the container 273 is just below the radial hole 263. The lower bottom surface of the container 273 is the second air-permeable plate 2730. A water-absorbing sponge, cotton and linen, expanded soil and other materials that can absorb and lose water can be placed above the container 273. The air channel 111 is coaxially arranged in the force rod 1. When the force rod 1 is installed on the probe rod 2, the rigid air tube 271 can extend into the air channel 111 and be sealed by the seal 115. Figure 1A vent 122 connected to the bottom end of the plug-in cavity 11 is also provided on the outer peripheral surface of the force rod 1. Through this arrangement, during specific use, at least one of the pump outlet end and the suction end of the pump body 8 is respectively connected to the airway 111 and at least one of the vent 122. When the bracket 27 is installed in the core rod 26, a water-absorbing material is provided above each container 273. The water-absorbing material can absorb the moisture of the water-absorbing member 29. The pump body 8 is connected to the control device 83. The control device 83 controls the pump body 8 to ventilate the inner cavity 262 and dry the internal water-absorbing material.

[0064] During specific use, a temperature sensor and a humidity sensor can also be provided in the mounting hole 234. The humidity sensor detects soil moisture. Both are connected to the control device 83. The pump body 8 is also connected to the control device 83. According to the detection values of the temperature sensor and the humidity sensor, when the temperature in the soil reaches a predetermined temperature value more than once, the pump body 8 is controlled to work, where the predetermined temperature value is 0-2 degrees Celsius higher than the dew point temperature.

[0065] Furthermore, as a specific embodiment, a pump body 8 is further included, and the upper end of the rigid air pipe 271 and the upper end of the container 273 are respectively connected to the pump inlet and pump outlet of the pump body 8.

[0066] Furthermore, a drying chamber 61 is provided on the circulating air path of the pump body 8 .

[0067] Specifically, as an implementation method, refer to Figure 1 The pump outlet end of the pump body 8 is connected to the vent 122, and the suction end is connected to the air channel 111, and a drying chamber 61 is set between the pump body 8 and the air channel 111. The drying chamber 61 is a chamber with a water-absorbing material inside. The water-absorbing material can be made of water-absorbing resin, cotton and linen, water-absorbing expanded soil and other materials. Through this setting, the gas can be dried through the drying chamber 61 during circulation, thereby improving the drying effect.

[0068] Further, refer to Figure 1As a specific embodiment, the drought monitoring device provided by the present application also includes a photovoltaic panel 5, an energy storage unit 51 connected to the photovoltaic panel 5, and a first temperature sensor 82 arranged on the outside. The drying chamber 61 is also connected to the filter chamber 62. The filter chamber 62 is provided with a chamber for filtering air dust such as air filter cotton. The drying chamber 61 is provided with a first air inlet 610 and a first air outlet 611. The filter chamber 62 is provided with a second air inlet 612. The second air inlet 612 is provided with an electromagnetic valve 7. The airway 111 is connected to the first switching valve 4. The common end of the first switching valve 4 is connected to the airway 111. The first switching valve 4 One outlet of the first switching valve 4 is connected to the atmosphere, and the other outlet of the first switching valve 4 is connected to the first air inlet 610; it also includes a second switching valve 81, the common end of the second switching valve 81 is connected to the pump outlet end of the pump body 8, one outlet of the second switching valve 81 is connected to the atmosphere, and the other outlet of the second switching valve 81 is connected to the vent 122, the first temperature sensor 82, the first switching valve 4, the second switching valve 81 and the solenoid valve 7 are all connected to the control device 83. Through the above-mentioned setting, the temperature of the external air is detected by the first temperature sensor 82, and the temperature sensor inside the installation groove 2621 detects the temperature inside the soil.

[0069] When the pump body 8 is required to work, the detection values of the two temperature sensors are first obtained. When the detection value of the first temperature sensor 82 is lower than the soil temperature value, and the difference between the two is more than 3 degrees Celsius, the first switching valve 4 is in a state of connecting the air duct 111 and the drying chamber 61, and the second switching valve 81 is in a state of connecting the air vent 122 and the pump body 8. The solenoid valve 7 is in a closed state. At this time, the pump body 8 works to circulate gas and dry the inner cavity 262. At this time, the internal circulation can avoid the introduction of external cold air, which will cause the core rod 26 to further cool down, and the rigid sleeve to further cool down and produce condensed water.

[0070] Furthermore, when the detection value of the first temperature sensor 82 is higher than the soil temperature value, the first switching valve 4 switches to connect the airway 111 and the atmosphere, the solenoid valve 7 switches to the open state, and the second switching valve 81 remains connected to the pump body 8 and the vent 122. At this time, when the pump body 8 is working, it can pump the outside air with a higher temperature into the inner cavity 262, which can increase the drying speed.

[0071] Furthermore, as a preferred embodiment, in actual application, the water-absorbing parts 29 in the drying chamber 61 can also be made of water-absorbing materials that can be ventilated and dried, such as cotton, linen, water-absorbing expansive soil, etc. Through this setting, when the control device 83 detects that the photovoltaic panel 5 generates a lot of electricity and the first temperature sensor 82 detects that the outside temperature is not lower than 5 degrees Celsius, the first switching valve 4 is controlled to be connected to the atmosphere, the solenoid valve 7 is opened, and the second switching valve 81 is switched to the state where the pump body 8 is connected to the atmosphere. At this time, when the pump body 8 is working, it can pass the outside air through the filter chamber 62 and the drying chamber 61 in turn, and then discharge it into the atmosphere through the pump body 8. The moisture inside the drying chamber 61 is brought out by the airflow introduced from the outside, and the water-absorbing material inside the drying chamber 61 is ventilated and dried. Preferably, the drying chamber 61 can be made of transparent material, and the internal water-absorbing material can be illuminated when the sunlight is directly exposed. Combined with ventilation, a better dehumidification effect can be achieved.

[0072] Through the above settings, the monitoring device can be set in the monitoring area, and in conjunction with the photovoltaic panel 5, it can work automatically for a long time, and can effectively avoid the probability of condensation water on the surface of the probe rod 2, reduce the impact of condensation water, and ensure the accuracy and effectiveness of the monitoring data.

[0073] Further, as a preferred embodiment, refer to Figure 10 、 Figure 15 A heat-insulating lining 233 is further provided between the rigid sleeve 23 and the core rod 26. Specifically, the heat-insulating lining 233 is provided on the inner circumference of the rigid sleeve 23. Rubber, rigid foam polyurethane and other materials can be used, preferably rigid foam polyurethane. By providing the heat-insulating lining 233, the heat conduction rate between the core rod 26 and the rigid sleeve 23 can be further reduced, so that the temperature difference between the surface temperature of the rigid sleeve 23 and the soil temperature is reduced, and the probability of condensation water generation is further reduced.

[0074] Further, as a specific embodiment, refer to Figure 6 、 Figure 11 、 Figure 13 、 Figure 15 As shown, the outer circumference of the core rod 26 is provided with at least one strip-shaped rib 261, and the inner circumferences of the shaft sleeve, thermal insulation sleeve 22, and rigid sleeve 23 are all provided with keyways that adapt to the ribs 261. Specifically, three strip-shaped ribs 261 are evenly spaced on the outer circumference of the core rod 26, and the inner circumferences of the shaft sleeve, thermal insulation sleeve 22, and rigid sleeve 23 are all adapted to be provided with keyways. The ribs 261 allow the shaft sleeve and core rod 26 to be circumferentially limited and transmission-coordinated, while the rigid sleeve 23 is circumferentially positioned through the cooperation of the keyways and ribs 261, ensuring that the heat exchange channels 232 correspond to the radial holes 263, facilitating assembly.

[0075] Further, as a preferred embodiment, refer to Figure 12-20, along the axial direction, it also includes an insertion rod 28 that passes through the shaft sleeve, the heat insulation sleeve 22, the rigid sleeve 23 and the plug end 260 in sequence. The number of the insertion rods 28 is equal to the number of heat exchange channels 232 on each rigid sleeve 23 and corresponds one to one. When the insertion rods 28 are in the plugged state, the insertion rods 28 block the heat exchange channels 232. Specifically, a first plug channel 211 is provided on the end surface of the first shaft sleeve 21, and a receiving groove 2110 is provided at the end of the first plug channel 211. Figure 14 The heat-insulating sleeve 22 is provided with a third plug-in channel 221 corresponding to the first plug-in channel. Figure 15 The rigid sleeve 23 is provided with a second plug-in channel 231 corresponding to the first plug-in channel 211 and the third plug-in channel 221. The second sleeve 25 is also provided with a first plug-in channel 211. When the sleeve, the heat-insulating sleeve 22 and the rigid sleeve 23 are sleeved on the outside of the core rod 26, the first plug-in channel 211, the second plug-in channel 231 and the third plug-in channel 221 are connected to form a through plug-in channel. Figure 11 、 Figure 12 , a plug hole 2600 corresponding to the plug channel is provided at the plug end 260, referring to Figure 20 The plug rod 28 includes a rod body that is plugged into the plug channel and an end plate 280 provided at the end of the rod body. The end plate 280 is provided with a second threaded hole 281. Figure 10 、 Figure 17 , the first plug channel 211 and the heat exchange channel 232 are arranged to overlap and cross each other. With this arrangement, after the sleeve, the heat insulation sleeve 22 and the rigid sleeve 23 are sequentially sleeved on the core rod 26, the first sleeve 21 and the second sleeve 25 are locked by the locking screw 251 to position them, and then the plug rod 28 is passed through the plug channel and the plug hole 2600. When the end plate 280 at the end of the plug rod 28 enters the mounting groove 2621, the lower end of the plug rod 28 can extend into the plug hole 2600. With this arrangement, the first sleeve 21, the second sleeve 25 and the plug end 2 are arranged at intervals. 60 together position the insertion rod 28, and the insertion rod 28 can circumferentially position the rigid sleeve 23 and the thermal insulation sleeve 22, and can block the heat exchange channel 232 when the insertion rod 28 is inserted, and then the force rod 1 is installed on the end of the probe rod 2, and the force rod 1 is used to apply force to the probe rod 2 to insert the probe rod 2 into the ground. By setting the insertion rod 28, on the one hand, it can ensure that the circumferential driving force is transmitted to the rigid sleeve 23 and the thermal insulation sleeve 22 through the probe rod 2 when the probe rod 2 rotates around the axis, avoiding the thermal insulation lining 233 from being damaged by extrusion, and on the other hand, it can also block the heat exchange channel 232 to avoid the soil from blocking the heat exchange channel 232.

[0076] Furthermore, after the insertion rod 28 is inserted into the ground, the force rod 1 is disassembled, and then the lifting screw is screwed into the second threaded hole 281, and the end of the lifting screw is tightened against the bottom of the installation groove 2621, so that the insertion rod 28 is pushed out of the plug hole 2600, and then the insertion rod 28 is pulled out, and the force rod 1 is installed again, the air path and the line are connected, and drought monitoring can be carried out.

[0077] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A drought monitoring device, comprising a probe rod (2) and a force application rod (1), characterized in that: The probe (2) comprises: A core rod (26) comprising a rod body and a plug-in end (260) disposed at one end of the rod body; A shaft sleeve is detachably fixedly connected to the rod body, comprising at least two sleeves spaced apart on the rod body and engaging with the rod body in a circumferential limiting manner; A rigid sleeve (23) includes a plurality of sleeves spaced apart from the shaft sleeve and sleeved on the core rod (26), and a mounting hole (234) for arranging a humidity sensor is provided on the side wall; The heat-insulating sleeve (22) is sleeved on the core rod (26) and is arranged between two adjacent rigid sleeves (23) and between the rigid sleeve (23) and the shaft sleeve; the shaft sleeve includes a first shaft sleeve and a second shaft sleeve, and the probe rod adopts a connection method in which the core rod, the heat-insulating sleeve, the rigid sleeve and the first shaft sleeve and the second shaft sleeve cooperate to reduce the speed of heat transfer between the rigid sleeve and the outside of the soil, and reduce the probability of condensation water forming on the surface of the rigid sleeve; At least one heat exchange channel (232) is provided on the side wall of the rigid sleeve (23), and a plurality of moisture absorbing components corresponding to the plurality of rigid sleeves (23) are provided on the side wall of the core rod (26), wherein the moisture absorbing component includes at least one radial hole (263) corresponding to the heat exchange channel (232), and a water absorbing member (29) is provided in the radial hole (263); the heat exchange channel is connected to the core rod, so that the air temperature inside the heat exchange channel is close to the temperature of the core rod. When the temperature difference between the inside and outside is large, the temperature inside the heat exchange channel is lower than the temperature of the soil and the rigid sleeve. At this time, part of the water vapor in the soil will condense on the surface of the core rod and in the heat exchange channel through the heat exchange channel; An inner cavity (262) is axially arranged in the core rod (26), the radial hole (263) is communicated with the inner cavity (262), and the inner cavity (262) is provided with a ventilation component; the ventilation component includes a bracket (27) arranged in the inner cavity (262), the bracket (27) includes a rigid air tube (271) extending into the inner cavity (262), and a plurality of containers (273) arranged at intervals on the rigid air tube (271), the plurality of containers (273) corresponding to the plurality of rigid sleeves (23) one by one, and when the bracket (27) is arranged in the inner cavity (262), each container (273) is located below the corresponding radial hole (263), the lower end of the rigid air tube (271) extends to the bottom of the inner cavity (262), and the upper part of each container (273) is used to arrange a water-absorbing material.

2. A drought monitoring device according to claim 1, characterized in that: The heat exchange channel (232) is arranged from one end away from the core rod (26) to one end close to the core rod (26), and is inclined in a direction close to the plug end (260).

3. The drought monitoring device according to claim 1, characterized in that: It also includes a pump body (8), wherein the upper end of the rigid air tube (271) and the upper end of the inner cavity (262) are respectively connected to the pump inlet end and the pump outlet end of the pump body (8).

4. A drought monitoring device according to claim 3, characterized in that: A drying chamber (61) is also provided on the circulating gas path of the pump body (8).

5. The drought monitoring device according to claim 1, characterized in that: A heat-insulating lining (233) is also provided between the rigid sleeve (23) and the core rod (26).

6. The drought monitoring device according to claim 1, characterized in that: The outer circumference of the core rod (26) is provided with at least one rib (261) of a strip structure, and the inner circumferences of the shaft sleeve, the heat insulation sleeve (22) and the rigid sleeve (23) are all provided with keyways adapted to the rib (261).

7. A drought monitoring device according to claim 6, characterized in that: Axially, it also includes an insertion rod (28) that passes through the shaft sleeve, the heat-insulating sleeve (22), the rigid sleeve (23) and the plug-in end (260) in sequence. The number of the insertion rods (28) is equal to the number of the heat exchange channels (232) on each rigid sleeve (23) and corresponds one to one. When the insertion rod (28) is in the plugged-in state, the insertion rod (28) blocks the heat exchange channels (232).

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