Device and method for simulating temperature increase of field soil

Abstract

The invention relates to the technical field of soil temperature increasing test simulation, and provides a field soil temperature increasing simulation device and method.The device comprises a heating pipe used for increasing temperature of soil in a simulation area, the heating pipe comprises a plurality of sections, the sections are laid in the simulation area in a layered mode according to the soil depth, and the heating pipe is used for heating the soil in the simulation area; the subsections in each layer are continuously and uniformly laid; the heating pipe comprises an insulating pipe and an electric heating wire penetrating through the insulating pipe; the power supply assembly is used for supplying power to the electric heating wire under the condition that the insulating tube is filled with the liquid, and the electric heating wire heats the liquid in the insulating tube under the condition that the electric heating wire is electrified; and the temperature controller is used for controlling the heating temperature of the heating pipe. According to the soil temperature increasing device, soil temperature increasing is achieved in a layered arrangement and heat conduction mode, soil disturbance is small, meanwhile, the temperature increasing mode is mild and stable, vegetation damage is avoided, the influence on the experimental result of soil temperature increasing simulation is reduced, and the accuracy of the experimental result is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of soil warming test simulation, and in particular to a field soil warming simulation device and method. Background Art

[0002] In order to predict the impact of global warming on the soil environment in the future, a series of studies on the response of soil nutrients to warming have been conducted by simulating warming. At present, the commonly used soil warming simulation methods include passive warming and active warming. Passive warming mainly includes soil displacement warming and greenhouse and open-top box warming. Active warming mainly includes infrared radiation warming and cable warming. Among them, the cable warming method has been widely studied and applied due to its strong controllability and relatively stable warming.

[0003] However, unreasonable cable layout can easily cause uneven heating of the soil, while reasonable layout requires excavation of a larger area of ​​soil when burying the cables, which will cause greater disturbance to the soil. In addition, when the cables are heated, the roots of vegetation near the cables are easily burned due to their own high temperature, which will have a great impact on the experimental results of soil warming simulation. Summary of the invention

[0004] The present invention provides a field soil heating simulation device and method, which are used to solve the defects that the existing cable heating simulation method causes great disturbance to the soil and the roots of vegetation near the cable are easily burned, which will have a great impact on the experimental results of the soil heating simulation.

[0005] The present invention provides a field soil temperature increase simulation device, comprising: A heating pipe, used to increase the temperature of the soil in the simulation area, the heating pipe comprising a plurality of segments, the plurality of segments are laid in layers according to the soil depth in the simulation area, and the segments in each layer are laid continuously and evenly; the heating pipe comprises an insulating pipe and an electric heating wire running through the insulating pipe; A power supply component, used for supplying power to the heating wire when the insulating tube is filled with liquid, so that the heating wire heats the liquid in the insulating tube when powered on; A temperature controller is used to control the heating temperature of the heating tube.

[0006] According to the field soil warming simulation device provided by the present invention, the heating wire in any segment of the heating tube is continuous, or the heating wire in any segment of the heating tube is obtained by connecting multiple heating wire segments in series using male and female wiring terminals.

[0007] According to the field soil warming simulation device provided by the present invention, in each layer obtained by the multiple segmented paving, the vertical distance between two adjacent layers is fixed or changes in gradient.

[0008] According to the field soil warming simulation device provided by the present invention, the temperature controller includes multiple ones, and any one of the temperature controllers is connected to a heating tube in the simulation area in layers, so as to independently control the heating temperature of the heating tube segments in the heating tube layers.

[0009] According to the field soil warming simulation device provided by the present invention, the temperature controller is also used to set a temperature threshold, and the temperature threshold includes an upper threshold and a lower threshold.

[0010] According to the field soil warming simulation device provided by the present invention, the temperature controller is also used to collect the liquid temperature and the soil temperature in the heating tube; determine the temperature adjustment strategy according to the temperature threshold, the liquid temperature and the soil temperature, and control the power supply component to supply power to the heating tube according to the temperature adjustment strategy.

[0011] According to the field soil warming simulation device provided by the present invention, the temperature controller includes a first temperature measuring probe and a second temperature measuring probe. The first temperature measuring probe is arranged in the heating tube and is used to collect the liquid temperature in the heating tube; the second temperature measuring probe is arranged outside the heating tube and is used to collect the soil temperature in the simulation area.

[0012] According to the field soil warming simulation device provided by the present invention, the field soil warming simulation device also includes a water pump and a pressurized water pipe, wherein: The power supply component is also used to supply power to the water pump; The water pump is used to inject liquid into the insulating tube through the pressurized water pipe; the pressurized water pipe is used to discharge gas in the liquid.

[0013] The present invention also provides a field soil warming simulation method, which is applied to any of the field soil warming simulation devices described above, and the field soil warming simulation method comprises: Laying multiple segments of the heating pipe in layers in the simulation area according to soil depths to obtain multiple soil layers in the simulation area; the segments are laid continuously and evenly in the soil layers; the heating pipe includes an insulating pipe and a heating wire running through the insulating pipe; After the insulating tube is filled with liquid, the heating wire is powered by a power supply assembly to heat the liquid in the insulating tube; The heating temperature of the heating pipe is controlled to control the temperature increase value of the soil layer.

[0014] The present invention provides a field soil warming simulation device and method. The heating tubes of the field soil warming simulation device are laid in layers in the soil of the simulation area. The laying is uniform and continuous, and the disturbance to the soil is small. Under the control of the heating temperature of the heating tube by the temperature controller, the power supply component supplies power to the heating wire in the heating tube to heat the liquid in the heating tube. The heating tube realizes soil warming by liquid heating and heat conduction. The warming method is gentle and stable, and will not burn the roots of vegetation, thereby reducing the impact on the experimental results of the soil warming simulation, thereby ensuring the accuracy of the experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural schematic diagram of the field soil warming simulation device provided by the present invention.

[0017] Figure 2 It is a structural schematic diagram of the heating tube provided by the present invention.

[0018] Figure 3 It is a schematic flow chart of the field soil warming simulation method provided by the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The embodiment of the present invention provides a field soil warming simulation device, which can realize field soil layered warming, accurately control the temperature and stably warm the soil, with little disturbance to the soil, and will not damage the crop root system, thus ensuring the accuracy of the experimental results of soil warming simulation. The device has low installation, operation and dimension costs. Specifically, Figure 1 FIG. 1 is one of the structural schematic diagrams of the field soil warming simulation device provided by the present invention, such as Figure 1 As shown, the device comprises: A heating pipe 10 is used to increase the temperature of the soil in the simulation area. The heating pipe includes a plurality of segments. The plurality of segments are laid in layers according to the soil depth in the simulation area. The segments in each layer are laid continuously and evenly. The heating pipe includes an insulating pipe and an electric heating wire running through the insulating pipe. A power supply component 20, used to supply power to the heating wire when the insulating tube is filled with liquid, so that the heating wire heats the liquid in the insulating tube when powered; The temperature controller 30 is used to control the heating temperature of the heating tube.

[0021] Optionally, multiple segments of the heating pipe 10 are laid in layers according to soil depth in the simulation area. Therefore, the heating pipe 10 heats the soil in the simulation area in layers. Each segment of the heating pipe 10 corresponds to a layer, and the segments of each layer are laid continuously and evenly.

[0022] Optionally, the segments of the heating tube 10 between different layers may be continuous or intermittent.

[0023] Optionally, for continuous and uniform laying of heating pipe sections of different layers, Figure 1 The S-shaped laying method shown can also be laid in a circle-by-circle uniform laying method. When the circle-by-circle uniform laying method is adopted, the laying can be carried out from the inside to the outside, starting from the center point of the simulation area in each layer and evenly laying in circles toward the edge of the simulation area; or it can be laid from the outside to the inside, starting from any point on the edge of the simulation area in each layer and evenly laying in circles toward the center of the simulation area.

[0024] In one embodiment, when the heating pipe segments are laid in a uniformly encircling manner, a circular encircling manner or a rectangular encircling manner may be adopted, and the selection may be made based on the shape and area of ​​the simulation area.

[0025] Optional, see Figure 2 The heating tube 10 includes an insulating tube 101 and a heating wire 102 that penetrates the insulating tube 101, wherein the heating tube 10 is a flexible material or a hard material, and illustratively, the heating tube 10 is a polyvinyl chloride (PVC) hose. The heating wire 102 further includes an inner wire and an outer layer that wraps the inner wire, wherein the inner wire is a high-strength constantan resistance wire, and the outer layer is a high-temperature resistant and waterproof silicone rubber, which is used to isolate the inner wire from the liquid in the insulating tube.

[0026] Optionally, the power supply component 20 includes a power supply. The power supply component 20 is used to supply power to the heating wire 102 when the insulating tube 101 is filled with liquid. When the heating wire 102 is powered on, it heats the liquid in the insulating tube 101, and the heating tube 10 heats the soil layer by layer using liquid.

[0027] The temperature controller 30 is used to control the heating temperature of the heating tube 10. In one embodiment, the temperature controller 30 is used to control the temperature of the liquid in the heating tube 10. In another embodiment, the temperature controller 30 is used to control the temperature of the heating wire 102 in the heating tube 10. In some embodiments, the temperature controller 30 is used to control the heating temperature of the soil layer by the heating tube 10.

[0028] Optionally, the power supply component 20 is connected to the temperature controller 30, and the temperature controller 30 is connected to the heating tube 10. In one embodiment, the temperature controller 30 is used to control the power supply parameters of the power supply component 20, thereby controlling the heating temperature of the heating tube 10. The power supply parameters include at least one of voltage, current and power.

[0029] In this embodiment, the heating tubes of the field soil warming simulation device are laid in layers in the soil of the simulation area. The laying is uniform and continuous, and the disturbance to the soil is small. Under the control of the heating temperature of the heating tube by the temperature controller, the power supply component supplies power to the heating wire in the heating tube to heat the liquid in the heating tube. The heating tube realizes soil warming by liquid heating and heat conduction. The warming method is gentle and stable, and will not burn the roots of vegetation, thereby reducing the impact on the experimental results of the soil warming simulation, thereby ensuring the accuracy of the experimental results.

[0030] Optionally, the heating wire 102 in any segment of the heating tube 10 is continuous, or the heating wire 102 in any segment of the heating tube 10 is obtained by connecting a plurality of heating wire segments in series using male and female terminals.

[0031] It can be seen that the heating wire 102 passes through the insulating tube 101 of the heating tube 10, and the length of the heating wire is generally greater than the length of the insulating tube. When the length of the heating wire is less than the length of the insulating tube, multiple heating wires can be connected in series through male and female terminals to obtain a heating wire with a length greater than the length of the insulating tube.

[0032] Optionally, in the simulation area, the heating pipe 10 is laid in layers to obtain multiple soil layers, each soil layer corresponds to a segment of the heating pipe 10, and the segment is laid continuously and evenly in the soil layer. For multiple soil layers, the vertical distance between two adjacent layers is fixed or changes in gradient.

[0033] If the vertical distance between two adjacent layers is fixed, for example, when the heating pipes 10 are laid in layers, the soil depths of the layers are 10 cm, 15 cm and 20 cm in order from top to bottom, and a layer is laid every 5 cm. In the vertical direction, the layers of the heating pipes 10 are evenly distributed.

[0034] If the vertical distance between two adjacent layers changes gradually, for example, when the heating pipes 10 are laid in layers, the soil depths of each layer are 5 cm, 10 cm, 20 cm and 35 cm in order from top to bottom. From top to bottom, the vertical distance between the layers increases successively, and the deeper the soil depth, the sparser the layers of the heating pipes 10 are laid. In one embodiment, from top to bottom, the vertical distance between the layers can also increase successively, for example, the soil depths of the layers are 5 cm, 20 cm, 30 cm and 35 cm in order, and the deeper the soil depth, the denser the layers of the heating pipes 10 are laid.

[0035] Optionally, the temperature controller 30 includes multiple ones, and any temperature controller 30 is connected to a heating tube layer in the simulation area to independently control the heating temperature of the heating tube segment corresponding to the heating tube layer.

[0036] In one embodiment, the sections of the heating pipe 10 laid in different layers are discontinuous, and a temperature controller is used to independently control the temperature of the heating pipe sections in one layer, that is, the heating temperatures of the heating pipe sections in different layers can be the same or different.

[0037] In another embodiment, the temperature controller 30 includes one. With one temperature controller 30, the temperature of the heating tube segments in different layers can be independently controlled, that is, the heating temperatures of the heating tube segments in different layers can be the same or different.

[0038] Optionally, the heating temperatures of the heating pipe segments in different layers are determined according to the soil depth of the layers.

[0039] In one embodiment, as the laying depth of the heating pipe segment in the soil increases, the heating temperature corresponding to the heating pipe segment gradually increases. In another embodiment, as the laying depth of the heating pipe segment in the soil increases, the heating temperature corresponding to the heating pipe segment gradually decreases. In some embodiments, the heating temperature of each heating pipe segment is the same.

[0040] Optionally, the temperature controller 30 is further used to set a temperature threshold, which includes an upper threshold and a lower threshold.

[0041] In one embodiment, the temperature controller 30 includes multiple temperature controllers 30, and the multiple temperature controllers 30 are respectively used to set the temperature thresholds of different layers of the heating tube 10. The temperature thresholds of different layers of the heating tube 10 can be the same or different.

[0042] In one embodiment, the temperature thresholds of different layers of the heating pipe 10 increase as the depth of the soil in which the layers are laid increases. In another embodiment, the temperature thresholds of different layers of the heating pipe 10 decrease as the depth of the soil in which the layers are laid increases.

[0043] The temperature controller 30 controls the heating temperature of the heating pipe segment according to the set temperature threshold, including but not limited to controlling the start and stop of the heating pipe segment, and controlling the heating temperature of the heating pipe during the heating process of the heating pipe segment.

[0044] Optionally, the temperature controller 30 is also used to collect the liquid temperature and soil temperature in the heating tube 10, and control the heating temperature of the heating tube 10 according to the collected liquid temperature and soil temperature.

[0045] In one embodiment, the temperature controller 30 controls the heating temperature of the heating tube 10 according to a set temperature threshold, the collected liquid temperature and the soil temperature.

[0046] Optionally, the temperature controller 30 determines a temperature adjustment strategy according to a set temperature threshold, the collected liquid temperature and the soil temperature, and controls the heating temperature of the heating tube 10 according to the temperature adjustment strategy.

[0047] Optionally, the temperature controller 30 determines a temperature adjustment strategy based on a set temperature threshold, collected liquid temperature and soil temperature, and controls power supply parameters of the power supply component 20 to supply power to the heating tube 10 according to the temperature adjustment strategy, thereby controlling the heating temperature of the heating tube 10.

[0048] Specifically, the temperature threshold set by the temperature controller 30 includes a first threshold and a second threshold. The first threshold includes a first upper threshold and a first lower threshold. The second threshold includes a second upper threshold and a second lower threshold.

[0049] Among them, the collected liquid temperature is the heating temperature of the heating tube 10. When the temperature controller 30 controls the heating temperature of the heating tube 10, specifically when the heating temperature of the heating tube 10 is greater than the first upper limit threshold, the heating temperature of the heating tube 10 is reduced to avoid damaging the roots of vegetation. When the heating temperature of the heating tube 10 is lower than the first lower limit threshold, the heating temperature of the heating tube 10 is increased to ensure the warming effect on the soil.

[0050] Furthermore, the collected soil temperature is used to characterize the warming effect on the soil. When the collected soil temperature is greater than the second upper limit threshold, the heating temperature of the heating tube 10 is reduced. When the collected soil temperature is less than the second lower limit threshold, the heating temperature of the heating tube 10 is increased.

[0051] In one embodiment, when the temperature controller 30 controls the heating temperature of the heating tube 10, specifically when the collected liquid temperature is greater than the first upper limit threshold, or the collected soil temperature is greater than the second upper limit threshold, the heating temperature of the heating tube 10 is reduced, and when the collected liquid temperature is less than the first lower limit threshold, or the collected soil temperature is less than the second lower limit threshold, the heating temperature of the heating tube 10 is increased.

[0052] Optionally, the temperature controller 30 includes a plurality of temperature controllers, and each segment of the heating tube 10 is independently temperature controlled by a temperature controller 30. Specifically, a temperature controller 30 is used to independently control the heating temperature of a layered heating tube segment.

[0053] Optionally, the temperature controller 30 includes a first temperature measuring probe and a second temperature measuring probe, wherein the first temperature measuring probe is arranged in the heating tube 10 to collect the liquid temperature in the heating tube 10, and the second temperature measuring probe is arranged outside the heating tube to collect the soil temperature in the simulation area.

[0054] In one embodiment, the temperature controller 30 includes multiple, any temperature controller 30 includes a first temperature measuring probe, or any temperature controller 30 includes multiple first temperature measuring probes. Optionally, multiple first temperature measuring probes are evenly arranged in the heating pipe segment corresponding to the temperature controller 30, and are used to collect the liquid temperature at different positions of the heating pipe segment. The average value of the liquid temperature collected by each first temperature measuring probe is the liquid temperature in the heating pipe segment.

[0055] In another embodiment, the temperature controller 30 includes multiple, any temperature controller 30 includes a second temperature measuring probe, or any temperature controller 30 includes multiple second temperature measuring probes. Optionally, multiple second temperature measuring probes are evenly arranged in the heating tube layer corresponding to the temperature controller 30, and are used to collect soil temperatures at different positions of the heating tube layer. The average value of the soil temperatures collected by each second temperature measuring probe is the collected soil temperature of the heating tube layer.

[0056] For the same temperature controller 30 , the temperature collection of the liquid in the insulating tube 101 by the first temperature measuring probe and the soil temperature collection by the second temperature measuring probe can be synchronous or asynchronous.

[0057] Optionally, any temperature controller 30 includes a first temperature measuring probe and a second temperature measuring probe; or, any temperature controller 30 includes a first temperature measuring probe and multiple second temperature measuring probes; or, any temperature controller 30 includes multiple first temperature measuring probes and one second temperature measuring probe; or, any temperature controller 30 includes multiple first temperature measuring probes and multiple second temperature measuring probes.

[0058] Optionally, any temperature controller 30 includes multiple first temperature measuring probes, and the multiple first temperature measuring probes are evenly arranged at various locations of the heating tube segment. For multiple heating tube segments, the distribution of the first temperature measuring probes in different heating tube segments may be the same or different.

[0059] Optionally, any temperature controller 30 includes a plurality of second temperature measuring probes, and the plurality of second temperature measuring probes are evenly distributed in the heating tube layers, and the distribution of the second temperature measuring probes in different layers may be the same or different.

[0060] Optionally, if a temperature controller 30 includes multiple first temperature measuring probes, and the laying conditions of the heating pipe segments in each layer are the same, and the distribution conditions of the first temperature measuring probes in different layers are also the same, the first temperature measuring probes are arranged in layers in the vertical direction, and the distance between the first temperature measuring probes of different layers at the same position in the simulation area is the same as the distance between the layers.

[0061] Optionally, if a temperature controller 30 includes multiple second temperature measuring probes, and the distribution of the first temperature measuring probes in each layer is the same, the first temperature measuring probes are arranged in layers in the vertical direction, and the distance between the first temperature measuring probes of different layers at the same position in the simulation area is the same as the distance between the layers.

[0062] In one embodiment, the plurality of second temperature measuring probes of any temperature controller 30 are arranged in the soil between the corresponding layer and the adjacent layer.

[0063] Optionally, for any target layer among the multiple heating tube layers, the first part of the multiple second temperature measuring probes of the temperature controller 30 is arranged in the soil between the target layer and the first layer, and the second part is arranged in the soil between the target layer and the second layer. Optionally, the number of temperature measuring probes corresponding to the first part of the second temperature measuring probes may be the same as or different from the number of temperature measuring probes corresponding to the second part. The first layer is the layer above the target layer in the vertical direction, and the second layer is the layer below the target layer in the vertical direction.

[0064] In one embodiment, different layers correspond to different temperature controllers 30 , and the number of first temperature measuring probes included in different temperature controllers 30 may be the same or different; the number of second temperature measuring probes included in different temperature controllers 30 may be the same or different.

[0065] In another embodiment, the number of the first temperature measuring probes and the number of the second temperature measuring probes included in the same temperature controller 30 may be the same or different.

[0066] Optionally, the field soil warming simulation device provided by the embodiment of the present invention also includes a water pump and a pressurized water pipe, wherein the power supply component 20 is also used to supply power to the water pump, the water pump is used to inject liquid into the insulating tube through the pressurized water pipe, and the pressurized water pipe is used to discharge the gas in the liquid during the liquid injection process, thereby avoiding the generation of bubbles in the heating tube 10 and ensuring that the heating tube 10 is heated evenly.

[0067] In this embodiment, the heating temperature of the heating tube is controlled by a temperature controller, and the heating tube adopts liquid heating and heat conduction of the insulating tube to heat the soil, thereby avoiding damage to the roots of vegetation due to excessive temperature. At the same time, the uniformity of soil warming in the entire simulation area can be ensured. The heating tubes are layered according to different soil depths to ensure the uniformity of vertical warming in the entire simulation area, thereby better simulating the warming effect of soil layers at different depths.

[0068] Furthermore, the temperature controller controls the start and stop and heating temperature of the heating tube by sensing the liquid temperature and soil temperature and combining it with the set temperature threshold, thereby realizing dynamic adjustment of the heating temperature of the heating tube, saving energy and electricity while increasing the temperature smoothly without damaging the root system of vegetation, and reducing energy consumption during the soil warming simulation process.

[0069] An embodiment of the present invention also provides a field soil warming simulation method, which is applied to the field soil warming simulation device described in the above embodiments. The embodiments of the field soil warming simulation method described below can be cross-referenced with the embodiments of the field soil warming simulation device described above.

[0070] Reference Figure 3 The field soil warming simulation method provided by the embodiment of the present invention is applied to a field soil warming simulation device, and specifically includes the following steps: Step 100, laying multiple segments of the heating pipe in layers according to soil depths in the simulation area to obtain multiple soil layers in the simulation area; the segments are laid continuously and evenly in the soil layers; the heating pipe includes an insulating pipe and a heating wire running through the insulating pipe; Step 200, after the insulating tube is filled with liquid, the heating wire is powered by a power supply assembly to heat the liquid in the insulating tube; Step 300, controlling the heating temperature of the heating pipe to control the temperature increase value of the soil layer.

[0071] Firstly, multiple segments of the heating pipe of the field soil warming simulation device are laid in layers in the simulation area according to the soil depth, so as to obtain multiple soil layers in the simulation area. One soil layer is formed by laying one heating pipe segment, and the heating pipe segments are laid continuously and evenly in the layer.

[0072] Optionally, the laying method of the heating pipe segments includes but is not limited to S-shaped laying and circumferential laying, wherein the circumferential laying can be from the inside to the outside in each layer, starting from the center of the simulation area and circling toward the edge of the simulation area; or it can be from the outside to the inside in each layer, starting from any point on the edge of the simulation area and circling toward the center of the simulation area.

[0073] The heating tube includes an insulating tube and a heating wire, wherein the insulating tube can be a flexible material or a hard material. In one embodiment, the insulating tube is a polyvinyl chloride (PVC) hose. The heating wire includes an inner wire and an outer layer, wherein the inner wire is a heating resistance wire, such as a high-strength constantan resistance wire, and the outer layer is an insulating layer for isolating the inner wire from the liquid in the insulating tube, such as a high-temperature resistant and waterproof silicone rubber layer.

[0074] Furthermore, liquid is injected into the insulating tube. After the insulating tube is filled with liquid, the electric heating wire is powered by the power supply component. The electric heating wire generates heat when powered, and heats the liquid in the insulating tube. Finally, the heating temperature of the heating tube is controlled, thereby controlling the temperature increase value of each soil layer.

[0075] In one embodiment, when the heating pipe segments are laid in layers, a trencher is used to make grooves, and the groove depth and the groove spacing can be set according to actual needs, and the heating pipe segments are buried in the grooves. For example, an S-shaped positioning control trencher is used to make grooves in the simulation area, and the groove spacing is determined according to the size of the simulation area. Each group of heating pipe segments is evenly arranged according to a preset vertical interval, or is arranged according to a preset vertical interval with a gradient change, so as to achieve an ideal heating effect.

[0076] After burying the heating pipes in sections according to the depth of the soil, backfill the soil, then fill the insulating pipe with water, connect the power supply in the power supply component, and power the heating wire in the heating pipe to heat the water in the insulating pipe. The heating pipe heats the soil through the water temperature by heat conduction.

[0077] Among them, when water is injected into the insulating tube, water is injected through a water pump, and during the water injection process, the gas in the water is discharged using a pressurized water pipe to avoid the formation of bubbles in the heating tube, which affects the uniformity of thermal conductivity of the heating tube.

[0078] The heating temperature of the heating pipe is controlled by independently controlling the heating pipe sections of different layers. For example, according to the temperature control requirements of different layers, the corresponding start temperature and stop temperature are set respectively. The start temperature of different layers can be the same or different, and the stop temperature of different layers can be the same or different.

[0079] When the water temperature in the stratified heating pipe segment is lower than the starting temperature, the power supply component is controlled to supply power to the heating wire to achieve temperature increase. When the water temperature in the stratified heating pipe segment is higher than the stop temperature, the power supply component is controlled to stop supplying power to the heating wire and stop increasing the temperature. The residual heat of the heating pipe is used to increase the temperature until the water temperature in the heating pipe is lower than the starting temperature, and then the power supply component is controlled to supply power to the heating wire again. By controlling the start and stop operation of the power supply component to the heating wire, the heating temperature of the heating pipe can be dynamically adjusted and controlled, and stable and uniform temperature increase can be achieved without damaging the roots of the vegetation in the simulation area.

[0080] Optionally, the control of the heating temperature of the heating tube is achieved based on the control of the start and stop or power supply parameters of the power supply component to the heating wire, and the start and stop or power supply parameters of the power supply component to the heating wire are determined based on a set temperature threshold, combined with the collected liquid temperature (such as water temperature) and soil temperature in the insulating tube.

[0081] Based on this, step 300 may also include: Step 301, collecting the liquid temperature in the heating tube and the soil temperature of the soil layer; Step 302, determining a temperature adjustment strategy according to the liquid temperature, the soil temperature and a preset temperature threshold; Step 303: Control the heating temperature of the heating pipe according to the temperature adjustment strategy to control the temperature increase value of the soil layer.

[0082] Also taking water as the liquid in the insulating tube as an example, when controlling the heating temperature of the heating tube, the liquid temperature in the heating tube and the soil temperature of the soil layer are first collected. The following explanation uses the water temperature as the liquid temperature.

[0083] The preset temperature threshold includes an upper threshold and a lower threshold. Optionally, the temperature threshold includes a first threshold corresponding to the water temperature and a second threshold corresponding to the soil temperature. Based on this, the upper threshold includes a first upper threshold corresponding to the water temperature and a second upper threshold corresponding to the soil temperature. Similarly, the lower threshold includes a first lower threshold corresponding to the water temperature and a second lower threshold corresponding to the soil temperature.

[0084] Optionally, the temperature thresholds of different layers may be the same or different. In one embodiment, for the upper limit threshold, as the soil depth of the heating pipe segments increases, the distance between the heating pipe segments and the vegetation roots becomes farther and farther, and the damage of high temperature to the vegetation gradually decreases. Therefore, as the soil depth corresponding to different layers increases, the set temperature threshold may also increase accordingly.

[0085] Furthermore, a temperature adjustment strategy is determined based on the collected liquid temperature and soil temperature in combination with the acquired temperature threshold. The temperature adjustment strategy is specifically used to indicate whether the heating temperature of the heating pipe needs to be increased, decreased, or kept unchanged.

[0086] According to the collected liquid temperature and soil temperature, combined with the obtained temperature threshold, a temperature adjustment strategy is determined, and the heating temperature of the heating pipe is controlled according to the temperature adjustment strategy, thereby controlling the temperature increase value of the soil layer.

[0087] In one embodiment, the temperature adjustment strategy is used to characterize the start and stop of the power supply of the power supply component to the heating wire and the control of the heating temperature of the heating tube. Specifically, the start and stop of the power supply of the power supply component is controlled according to the temperature adjustment strategy, thereby controlling the heating temperature of the heating tube.

[0088] In another embodiment, the temperature adjustment strategy is used to characterize the way in which the power supply component adjusts the power supply parameters of the heating wire, and controls the heating temperature of the heating tube. Specifically, the power supply parameters of the power supply component are adjusted according to the temperature adjustment strategy, thereby controlling the heating temperature of the heating tube.

[0089] In another embodiment, the temperature adjustment strategy includes power supply parameters of the power supply component for supplying power to the heating wire, and controls the heating temperature of the heating tube, specifically adjusting the power supply parameters of the power supply component to the power supply parameters in the temperature adjustment strategy, thereby controlling the heating temperature of the heating tube.

[0090] In this embodiment, the heating tubes are evenly laid out in layers and the liquid is heated by electric heating wires. The heating tubes use heat conduction to achieve soil warming. The warming process is gentle, stable and uniform, avoiding damage to the roots of vegetation. During the laying of the heating tubes, the soil is less disturbed, which reduces the impact on the experimental results of the warming simulation and ensures the accuracy of the experimental results.

[0091] Furthermore, based on the independent temperature control of different layers, corresponding temperature thresholds can be set according to the temperature control requirements of different layers, and independent temperature control can be performed on different depths of soil layers as needed to avoid the heating tube temperature being too high, damaging nearby vegetation, or the heating tube temperature being too low, affecting the warming effect on the soil. In the temperature control process, based on the perception of the heating temperature of the heating tube and the soil temperature, the heating temperature can be dynamically adjusted to achieve gentle and stable warming, which is conducive to ensuring the warming effect.

[0092] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative effort.

[0093] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A field soil warming simulation device, characterized in that: include: A heating pipe, used to increase the temperature of the soil in the simulation area, the heating pipe comprising a plurality of segments, the plurality of segments are laid in layers according to the soil depth in the simulation area, and the segments in each layer are laid continuously and evenly; the heating pipe comprises an insulating pipe and an electric heating wire running through the insulating pipe; A power supply component, used for supplying power to the heating wire when the insulating tube is filled with liquid, so that the heating wire heats the liquid in the insulating tube when powered on; A temperature controller is used to control the heating temperature of the heating tube.

2. The field soil warming simulation device according to claim 1, characterized in that: The heating wires in any segment of the heating tube are continuous, or the heating wires in any segment of the heating tube are obtained by connecting a plurality of heating wire segments in series using male and female wiring terminals.

3. The field soil warming simulation device according to claim 1, characterized in that: In each layer obtained by laying out the multiple sections, the vertical distance between two adjacent layers is fixed or changes in a gradient.

4. The field soil warming simulation device according to claim 1, characterized in that: The temperature controllers include multiple ones, and any one of the temperature controllers is connected to a heating tube layer in the simulation area to independently control the heating temperature of the heating tube segments of the heating tube layer.

5. The field soil warming simulation device according to claim 1, characterized in that: The temperature controller is further used to set a temperature threshold, which includes an upper threshold and a lower threshold.

6. The field soil warming simulation device according to claim 5, characterized in that: The temperature controller is also used to collect the liquid temperature and soil temperature in the heating tube; determine the temperature adjustment strategy according to the temperature threshold, the liquid temperature and the soil temperature, and control the power supply component to supply power to the heating tube according to the temperature adjustment strategy.

7. The field soil warming simulation device according to claim 6, characterized in that: The temperature controller includes a first temperature measuring probe and a second temperature measuring probe. The first temperature measuring probe is arranged in the heating tube and is used to collect the liquid temperature in the heating tube; the second temperature measuring probe is arranged outside the heating tube and is used to collect the soil temperature in the simulation area.

8. The field soil warming simulation device according to claim 1, characterized in that: It also includes a water pump and a pressurized water pipe, including: The power supply component is also used to supply power to the water pump; The water pump is used to inject liquid into the insulating tube through the pressurized water pipe; the pressurized water pipe is used to discharge gas in the liquid.

9. A field soil warming simulation method, characterized in that: Applied to the field soil warming simulation device as described in any one of claims 1 to 8 above, the field soil warming simulation method comprises: Laying multiple segments of the heating pipe in layers in the simulation area according to soil depths to obtain multiple soil layers in the simulation area; the segments are laid continuously and evenly in the soil layers; the heating pipe includes an insulating pipe and a heating wire running through the insulating pipe; After the insulating tube is filled with liquid, the heating wire is powered by a power supply assembly to heat the liquid in the insulating tube; The heating temperature of the heating pipe is controlled to control the temperature increase value of the soil layer.

10. The field soil warming simulation method according to claim 9, characterized in that: The step of controlling the heating temperature of the heating pipe to control the temperature increase value of the soil layer comprises: collecting the temperature of the liquid in the heating pipe and the soil temperature of the soil layer; Determining a temperature adjustment strategy according to the liquid temperature, the soil temperature and a preset temperature threshold; The heating temperature of the heating pipe is controlled according to the temperature adjustment strategy to control the temperature increase value of the soil layer.

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