Field Soil Warming Simulation Device and Method
By laying heating pipes in sections within the soil depth layers, and using liquid heating and heat conduction to warm the soil, the problems of soil disturbance and vegetation root damage caused by cable heating simulation were solved, achieving a stable and uniform heating effect and accurate experimental results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANDONG ACADEMY OF AGRICULTURAL SCIENCES
- Filing Date
- 2024-12-03
- Publication Date
- 2026-07-17
AI Technical Summary
Existing methods for simulating soil warming by cables cause significant disturbance to the soil, and the roots of vegetation near the cables are easily scorched, affecting the accuracy of soil warming simulation results.
Heating pipes are laid in sections within the soil layers at different depths. They are heated using insulated pipes and through-wire heating wires. Soil temperature is increased through liquid heating and heat conduction. The heating temperature is precisely controlled by a temperature controller to avoid damage to the plant roots.
This method minimizes soil disturbance during the soil warming process, ensures stable and uniform warming, reduces the impact on experimental results, and guarantees experimental accuracy.
Smart Images
Figure CN119729925B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of soil warming test simulation technology, and in particular to a field soil warming simulation device and method. Background Technology
[0002] To predict the impact of continued global warming on the soil environment, simulated warming methods have been used, resulting in a series of studies on the response of soil nutrients to warming. Currently, commonly used soil warming simulation methods include passive and active warming. Passive warming mainly includes soil displacement warming and greenhouse / open-top box warming, while active warming mainly includes infrared radiation warming and cable warming. Among these, cable warming is widely studied and applied due to its high controllability and relatively stable warming characteristics.
[0003] However, improper cable laying can easily lead to uneven soil heating. Proper laying requires extensive excavation of the soil when burying the cable, which can cause significant soil disturbance. Furthermore, the high temperature of the cable itself can easily burn the roots of vegetation near the cable, which can have a significant impact on the experimental results of soil warming simulation. Summary of the Invention
[0004] This invention provides a field soil warming simulation device and method to solve the shortcomings of existing cable warming simulation methods, which cause significant disturbance to the soil and easily scorch the roots of vegetation near the cable, thus greatly affecting the experimental results of soil warming simulation.
[0005] This invention provides a field soil warming simulation device, comprising:
[0006] A heating element is used to heat the soil in a simulated area. The heating element comprises multiple segments, which are laid in layers according to soil depth in the simulated area. The segments in each layer are laid continuously and uniformly. The heating element includes an insulating tube and a heating wire passing through the insulating tube.
[0007] A power supply assembly is used to supply power to the heating wire when the insulating tube is filled with liquid, and the heating wire heats the liquid in the insulating tube when energized;
[0008] A temperature controller is used to control the heating temperature of the heating element.
[0009] 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 terminals.
[0010] According to the field soil warming simulation device provided by the present invention, in each layer obtained by the multiple segmented laying, the vertical distance between two adjacent layers is fixed or varies with gradient.
[0011] According to the field soil warming simulation device provided by the present invention, the temperature controller includes multiple controllers, each of which is connected in layers to a heating pipe in the simulation area, for independently controlling the heating temperature of the heating pipe segments in the layered heating pipe.
[0012] According to the field soil warming simulation device provided by the present invention, the temperature controller is further used to set a temperature threshold, which includes an upper limit threshold and a lower limit threshold.
[0013] According to the field soil warming simulation device provided by the present invention, the temperature controller is further configured to collect the liquid temperature and soil temperature inside the heating tube; determine a temperature adjustment strategy based on 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.
[0014] According to the field soil warming simulation device provided by the present invention, the temperature controller includes a first temperature probe and a second temperature probe. The first temperature probe is disposed inside the heating tube and is used to collect the liquid temperature inside the heating tube; the second temperature probe is disposed outside the heating tube and is used to collect the soil temperature in the simulation area.
[0015] According to the field soil warming simulation device provided by the present invention, the field soil warming simulation device further includes a water pump and a pressurized water pipe, wherein:
[0016] The power supply component is also used to supply power to the water pump;
[0017] The water pump is used to inject liquid into the insulating pipe through the pressurized water pipe; the pressurized water pipe is used to discharge gas from the liquid.
[0018] The present invention also provides a method for simulating soil warming in the field, applied to any of the above-described soil warming simulation devices, wherein the method for simulating soil warming in the field includes:
[0019] Multiple segments of the heating tube are laid in layers according to soil depth within the simulated area to obtain multiple soil layers within the simulated area; the segments are laid continuously and uniformly in the soil layers; the heating tube includes an insulating tube and a heating wire passing through the insulating tube;
[0020] After filling the insulating tube with liquid, the heating wire is powered by a power supply assembly to heat the liquid inside the insulating tube.
[0021] The heating temperature of the heating tube is controlled to control the temperature increase of the soil stratification.
[0022] The field soil warming simulation device and method provided by this invention involve laying heating tubes in layers in the soil of the simulated area. The layering is uniform and continuous, minimizing soil disturbance. Under the control of the heating temperature of the heating tubes by the temperature controller, the power supply component supplies power to the heating wires inside the heating tubes to heat the liquid inside. The heating tubes achieve soil warming through liquid heating and heat conduction. The warming method is gentle and stable, and will not scorch the plant roots, reducing the impact on the experimental results of soil warming simulation and thus ensuring the accuracy of the experimental results. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the outdoor soil warming simulation device provided by the present invention.
[0025] Figure 2 This is a schematic diagram of the heating tube provided by the present invention.
[0026] Figure 3 This is a flowchart illustrating the field soil warming simulation method provided by the present invention. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0028] This invention provides a field soil warming simulation device that can achieve stratified soil warming, precisely control and stably increase temperature, minimize soil disturbance, and avoid damaging crop roots, ensuring the accuracy of soil warming simulation experimental results. The device also has low installation, operation, and dimensional costs. Specifically, Figure 1 This 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 includes:
[0029] Heating tube 10 is used to heat the soil in the simulated area. The heating tube includes multiple segments, which are laid in layers according to soil depth in the simulated area. The segments in each layer are laid continuously and uniformly. The heating tube includes an insulating tube and a heating wire passing through the insulating tube.
[0030] The power supply assembly 20 is used to supply power to the heating wire when the insulating tube is filled with liquid, and the heating wire heats the liquid in the insulating tube when energized;
[0031] Temperature controller 30 is used to control the heating temperature of the heating tube.
[0032] Optionally, multiple segments of the heating pipe 10 are laid in layers according to soil depth within 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 uniformly.
[0033] Optionally, the segments of the heating tube 10 between different layers can be continuous or discontinuous.
[0034] Optionally, for the continuous and uniform laying of heating pipes in different layers, a method can be adopted. Figure 1 The S-shaped paving pattern shown can also be laid in a uniform, circular pattern. When laying in a uniform, circular pattern, it can be done from the inside out, starting from the center of the simulated area in each layer and paving towards the edge of the simulated area in circular patterns; or it can be done from the outside in, starting from any point on the edge of the simulated area in each layer and paving towards the center of the simulated area in circular patterns.
[0035] In one embodiment, when laying heating pipe segments in a uniform, ring-by-ring manner, either a circular or rectangular ring method can be used, depending on the shape and area of the simulated region.
[0036] Optional, refer to Figure 2 The heating element 10 includes an insulating tube 101 and a heating wire 102 extending through the insulating tube 101. The heating element 10 is made of a flexible or rigid material; exemplarily, it is a polyvinyl chloride (PVC) flexible hose. The heating wire 102 further includes an inner wire and an outer layer enclosing the inner wire. The inner wire is a high-strength constantan resistance wire, and the outer layer is a high-temperature resistant and waterproof silicone rubber used to isolate the inner wire from the liquid inside the insulating tube.
[0037] Optionally, the power supply assembly 20 includes a power source. The power supply assembly 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 energized, it heats the liquid in the insulating tube 101, and the heating tube 10 uses liquid to heat the soil layers.
[0038] Temperature controller 30 is used to control the heating temperature of heating tube 10. In one embodiment, temperature controller 30 is used to control the liquid temperature inside heating tube 10. In another embodiment, temperature controller 30 is used to control the temperature of heating wire 102 inside heating tube 10. In some embodiments, temperature controller 30 is used to control the heating temperature of heating tube 10 on soil stratification.
[0039] 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.
[0040] In this embodiment, the heating tubes of the field soil warming simulation device are laid in layers in the soil of the simulated area. The layering is uniform and continuous, minimizing soil disturbance. Under the control of the heating temperature of the heating tubes by the temperature controller, the power supply component supplies power to the heating wires inside the heating tubes to heat the liquid inside the heating tubes. The heating tubes achieve soil warming through liquid heating and heat conduction. The warming method is gentle and stable, and will not scorch the plant roots, reducing the impact on the experimental results of soil warming simulation and thus ensuring the accuracy of the experimental results.
[0041] 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 multiple heating wire segments in series using male and female terminals.
[0042] As can be seen, the heating wire 102 passes through the insulating tube 101 of the heating tube 10. 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.
[0043] Optionally, within the simulation area, the heating pipe 10 is laid out in layers to obtain multiple soil layers. Each soil layer corresponds to a segment of the heating pipe 10, and this segment is laid continuously and uniformly within the soil layers. For multiple soil layers, the vertical distance between two adjacent layers is fixed or varies gradually.
[0044] If the vertical distance between two adjacent layers is fixed, for example, when laying the heating pipe 10 in layers, the soil depth of each layer is 10cm, 15cm and 20cm respectively, in order from top to bottom, with each layer laid at a 5cm interval. In the vertical direction, the layers of the heating pipe 10 are evenly distributed.
[0045] If the vertical distance between two adjacent layers changes gradually, for example, when laying the heating pipe 10 in layers, the soil depth of each layer is 5cm, 10cm, 20cm, and 35cm respectively, from top to bottom. The vertical distance between layers increases sequentially from top to bottom; the deeper the soil, the sparser the layers of the heating pipe 10. In one embodiment, the vertical distance between layers can also increase sequentially from top to bottom; for example, the soil depth of each layer is 5cm, 20cm, 30cm, and 35cm respectively, and the deeper the soil, the denser the layers of the heating pipe 10.
[0046] Optionally, the temperature controller 30 includes multiple controllers, and any one temperature controller 30 is connected in layers to a heating tube in the simulation area to independently control the heating temperature of the heating tube segment corresponding to that heating tube layer.
[0047] In one embodiment, the heating tube 10 is laid in discontinuous segments in different layers. Each segment of the heating tube in a layer is independently controlled by a temperature controller. That is, the heating temperatures of different segments of the heating tube in different layers can be the same or different.
[0048] In another embodiment, the temperature controller 30 includes one temperature controller 30, which can independently control the temperature of different layers of heating tube segments. That is, the heating temperature of different layers of heating tube segments can be the same or different.
[0049] Optionally, the heating temperature of the heating tubes in different layers can be determined based on the depth of the soil layers.
[0050] In one embodiment, the heating temperature of the heating pipe segment gradually increases as the laying depth in the soil increases. In another embodiment, the heating temperature of the heating pipe segment gradually decreases as the laying depth in the soil increases. In some embodiments, the heating temperature of each heating pipe segment is the same.
[0051] Optionally, the temperature controller 30 is also used to set temperature thresholds, which include an upper limit threshold and a lower limit threshold.
[0052] In one embodiment, the temperature controller 30 includes multiple controllers, each of which is used to set the temperature threshold for different layers of the heating tube 10. The temperature thresholds for different layers of the heating tube 10 may be the same or different.
[0053] In one embodiment, the temperature threshold of different layers of the heating pipe 10 increases with the increase of the soil depth in which the layers are laid; in another embodiment, the temperature threshold of different layers of the heating pipe 10 decreases with the increase of the soil depth in which the layers are laid.
[0054] The temperature controller 30 controls the heating temperature of the heating tube segments according to the set temperature threshold, including but not limited to controlling the start and stop of the heating tube segments, and controlling the heating temperature of the heating tube during the segmented heating process.
[0055] Optionally, the temperature controller 30 is also used to collect the liquid temperature and soil temperature inside the heating tube 10, and to control the heating temperature of the heating tube 10 based on the collected liquid temperature and soil temperature.
[0056] In one embodiment, the temperature controller 30 controls the heating temperature of the heating tube 10 based on a set temperature threshold, the collected liquid temperature, and the soil temperature.
[0057] Optionally, the temperature controller 30 determines a temperature adjustment strategy based on a set temperature threshold, the collected liquid temperature and soil temperature, and controls the heating temperature of the heating tube 10 according to the temperature adjustment strategy.
[0058] Optionally, the temperature controller 30 determines a temperature adjustment strategy based on a set temperature threshold, the collected liquid temperature and soil temperature, and controls the 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.
[0059] 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 limit threshold and a first lower limit threshold, and the second threshold includes a second upper limit threshold and a second lower limit threshold.
[0060] 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, it lowers the heating temperature of the heating tube 10 when the heating temperature of the heating tube 10 is greater than the first upper limit threshold to avoid damaging the plant roots. When the heating temperature of the heating tube 10 is lower than the first lower limit threshold, it increases the heating temperature of the heating tube 10 to ensure the warming effect on the soil.
[0061] Furthermore, the collected soil temperature is used to characterize the soil warming effect. When 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 soil temperature is less than the second lower limit threshold, the heating temperature of the heating tube 10 is increased.
[0062] In one embodiment, when the temperature controller 30 controls the heating temperature of the heating tube 10, it specifically lowers the heating temperature of the heating tube 10 when the collected liquid temperature is greater than a first upper limit threshold or the collected soil temperature is greater than a second upper limit threshold, and increases the heating temperature of the heating tube 10 when the collected liquid temperature is less than a first lower limit threshold or the collected soil temperature is less than a second lower limit threshold.
[0063] Optionally, if there are multiple temperature controllers 30, then each segment of the heating tube 10 is independently controlled by a temperature controller 30. Specifically, one temperature controller 30 is used to independently control the heating temperature of a layered heating tube segment.
[0064] Optionally, the temperature controller 30 includes a first temperature probe and a second temperature probe. The first temperature probe is disposed inside the heating tube 10 to collect the liquid temperature inside the heating tube 10, and the second temperature probe is disposed outside the heating tube to collect the soil temperature in the simulated area.
[0065] In one embodiment, the temperature controller 30 includes multiple temperature controllers, each of which includes a first temperature probe, or each temperature controller 30 includes multiple first temperature probes. Optionally, the multiple first temperature probes are evenly arranged within the heating tube segment corresponding to the temperature controller 30, for collecting the liquid temperature at different locations within the heating tube segment. The average value of the liquid temperature collected by each first temperature probe is the liquid temperature within the heating tube segment.
[0066] In another embodiment, the temperature controller 30 includes multiple temperature controllers, each of which includes one second temperature probe, or each temperature controller 30 includes multiple second temperature probes. Optionally, the multiple second temperature probes are evenly arranged within the heating tube layers corresponding to the temperature controller 30, for collecting soil temperatures at different locations within the heating tube layers. The average soil temperature collected by each second temperature probe is the collected soil temperature of the heating tube layer.
[0067] For the same temperature controller 30, the temperature acquisition of the liquid inside the insulating tube 101 by the first temperature probe and the temperature acquisition of the soil by the second temperature probe can be synchronous or asynchronous.
[0068] Optionally, any temperature controller 30 includes a first temperature probe and a second temperature probe; or, any temperature controller 30 includes a first temperature probe and multiple second temperature probes; or, any temperature controller 30 includes multiple first temperature probes and a second temperature probe; or, any temperature controller 30 includes multiple first temperature probes and multiple second temperature probes.
[0069] Optionally, any temperature controller 30 includes multiple first temperature probes, which are evenly distributed at various points in the heating tube segment. For multiple heating tube segments, the distribution of the first temperature probes in different heating tube segments can be the same or different.
[0070] Optionally, any temperature controller 30 includes multiple second temperature probes, which are evenly distributed in the heating tube layers. The distribution of the second temperature probes in different layers can be the same or different.
[0071] Optionally, if a temperature controller 30 includes multiple first temperature probes, and the heating tube segments are laid out in the same way in each layer, and the distribution of the first temperature probes in different layers is also the same, the first temperature probes are arranged in layers in the vertical direction, and the distance between the first temperature probes in different layers at the same location in the simulation area is the same as the distance between each layer.
[0072] Optionally, if a temperature controller 30 includes multiple second temperature probes, and the distribution of the first temperature probes in each layer is the same, the first temperature probes are arranged in layers in the vertical direction, and the distance between the first temperature probes in different layers at the same location in the simulation area is the same as the distance between each layer.
[0073] In one embodiment, a plurality of second temperature probes of any temperature controller 30 are deployed in the soil between the corresponding layer and the adjacent layer.
[0074] Optionally, for any target layer among multiple heating tube layers, the first part of the multiple second temperature probes of its 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 probes corresponding to the first part of the second temperature probes can be the same as or different from the number of temperature 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.
[0075] In one embodiment, different layers correspond to different temperature controllers 30, and the number of first temperature probes included in different temperature controllers 30 may be the same or different; the number of second temperature probes included in different temperature controllers 30 may be the same or different.
[0076] In another embodiment, the number of first temperature probes and the number of second temperature probes included in the same temperature controller 30 may be the same or different.
[0077] Optionally, the field soil warming simulation device provided in this embodiment of the invention further includes a water pump and a pressurized water pipe. 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 pipe through the pressurized water pipe. The pressurized water pipe is used to discharge gas in the liquid during the liquid injection process, thereby avoiding the generation of air bubbles in the heating pipe 10 and ensuring that the heating pipe 10 is heated evenly.
[0078] In this embodiment, the heating temperature of the heating tube is controlled by a temperature controller. The heating tube uses liquid heating and insulating tube heat conduction to warm the soil, avoiding damage to the plant roots due to excessive temperature. At the same time, it can ensure the uniformity of soil warming throughout the simulation area. The heating tube is layered according to different soil depths to ensure the uniformity of vertical warming throughout the simulation area, thereby better simulating the warming effect of soil layers at different depths.
[0079] Furthermore, the temperature controller senses the liquid and soil temperatures and, in conjunction with a set temperature threshold, controls the start / stop of the heating element and the heating temperature, thereby achieving dynamic adjustment of the heating element's temperature. This ensures gradual heating without damaging the plant root system while saving energy and electricity, reducing energy consumption during the soil warming simulation process.
[0080] This invention also provides a method for simulating soil warming in the field, which is applied to the soil warming simulation device described in the above embodiments. The embodiments of the soil warming simulation method described below can be referred to in conjunction with the embodiments of the soil warming simulation device described above.
[0081] Reference Figure 3 The field soil warming simulation method provided in this embodiment of the invention is applied to a field soil warming simulation device and specifically includes the following steps:
[0082] Step 100: Multiple segments of the heating tube are laid in layers according to soil depth within the simulated area to obtain multiple soil layers within the simulated area; the segments are laid continuously and uniformly in the soil layers; the heating tube includes an insulating tube and a heating wire passing through the insulating tube;
[0083] Step 200: After filling the insulating tube with liquid, power supply is used to supply power to the heating wire to heat the liquid inside the insulating tube;
[0084] Step 300: Control the heating temperature of the heating tube to control the temperature increase of the soil stratification.
[0085] First, multiple segments of the heating pipe of the field soil warming simulation device are laid in layers according to soil depth in the simulation area to obtain multiple soil layers in the simulation area. Each soil layer is made up of a segment of the heating pipe, and the heating pipe segments are laid continuously and evenly in the layers.
[0086] Optionally, the heating tubes can be laid in segments, including but not limited to S-shaped laying and circumferential laying. Circumferential laying can be done by laying the heating tubes from the inside out in each layer, starting from the center of the simulation area and moving towards the edge of the simulation area in circles; or it can be done by laying the heating tubes from the outside in each layer, starting from any point on the edge of the simulation area and moving towards the center of the simulation area in circles.
[0087] The heating element comprises an insulating tube and a heating wire. The insulating tube can be made of a flexible or rigid material; in one embodiment, the insulating tube is a polyvinyl chloride (PVC) flexible tube. The heating wire comprises an inner wire and an outer layer. The inner wire is a heating resistance wire, such as a high-strength constantan resistance wire, and the outer layer is an insulating layer used to isolate the inner wire from the liquid inside the insulating tube, such as a high-temperature resistant and waterproof silicone rubber layer.
[0088] Furthermore, liquid is injected into the insulating tube. After the insulating tube is filled with liquid, the heating wire is powered by a power supply component. The heating wire heats up when energized, thus heating the liquid inside the insulating tube. Finally, the heating temperature of the heating tube is controlled, thereby controlling the temperature increase value for each soil layer.
[0089] In one embodiment, when laying heating pipes in segments, a trencher is used to create grooves. The groove depth and spacing can be set according to actual needs, and the heating pipe segments are buried within the grooves. For example, an S-shaped positioning control trencher is used to create grooves within a simulated area. The groove spacing is determined based on the size of the simulated area. Each group of heating pipe segments is evenly spaced at a preset vertical interval, or at a preset gradient vertical interval, to achieve the desired heating effect.
[0090] After the heating pipes were laid in sections according to the soil depth, the soil was backfilled, and then the insulating pipes were filled with water. The power supply was then connected to the power supply unit to power the heating wires in the heating pipes, thereby heating the water inside the insulating pipes. The heating pipes heat the soil through heat conduction via the water temperature.
[0091] Specifically, when injecting water into the insulating tube, water is injected using a water pump. During the water injection process, pressurized water pipes are used to expel air from the water to prevent air bubbles from forming in the heating tube and affecting the uniformity of heat conduction.
[0092] The heating temperature of the heating element is controlled independently for each section of the heating element. For example, based on the temperature control requirements of different sections, corresponding start-up and stop temperatures are set separately. The start-up temperatures of different sections can be the same or different, and the stop temperatures of different sections can also be the same or different.
[0093] When the water temperature within the segmented heating element is lower than the start-up temperature, the power supply component supplies power to the heating element to increase the temperature. When the water temperature within the segmented heating element is higher than the stop temperature, the power supply component stops supplying power to the heating element, stopping the temperature increase. The residual heat of the heating element is then used for further heating until the water temperature within the heating element falls below the start-up temperature, at which point the power supply component resumes supplying power to the heating element. By controlling the start and stop of the power supply to the heating element, the heating temperature of the heating element can be dynamically adjusted and controlled, achieving stable and uniform heating without damaging the root system of vegetation within the simulated area.
[0094] Optionally, the heating temperature of the heating tube is controlled by controlling the start / stop or power supply parameters of the power supply component to the heating wire. The start / 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 inside the insulating tube.
[0095] Based on this, step 300 may also include:
[0096] Step 301: Collect the liquid temperature inside the heating tube and the soil temperature of the soil layers;
[0097] Step 302: Determine a temperature adjustment strategy based on the liquid temperature, the soil temperature, and a preset temperature threshold.
[0098] Step 303: Control the heating temperature of the heating tube according to the temperature adjustment strategy to control the temperature increase value of the soil stratification.
[0099] Similarly, taking water as the liquid inside the insulating tube as an example, when controlling the heating temperature of the heating tube, the temperature of the liquid inside the heating tube and the soil temperature of the soil layers are collected first. The following explanation uses water temperature as the liquid temperature.
[0100] The preset temperature thresholds include an upper limit threshold and a lower limit threshold. Optionally, the temperature thresholds include a first threshold corresponding to water temperature and a second threshold corresponding to soil temperature. Based on this, the upper limit threshold includes a first upper limit threshold corresponding to water temperature and a second upper limit threshold corresponding to soil temperature. Similarly, the lower limit threshold includes a first lower limit threshold corresponding to water temperature and a second lower limit threshold corresponding to soil temperature.
[0101] Optionally, the temperature thresholds for different layers can 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, the temperature threshold can be increased as the soil depth corresponding to different layers increases.
[0102] Furthermore, based on the collected liquid temperature and soil temperature, combined with the obtained temperature threshold, a temperature adjustment strategy is determined. This temperature adjustment strategy is specifically used to characterize whether the heating temperature of the heating tube needs to be increased, decreased, or kept unchanged.
[0103] Based on the collected liquid and soil temperatures, and combined with the obtained temperature thresholds, a temperature adjustment strategy is determined. The heating temperature of the heating element is then controlled according to this strategy, thereby controlling the temperature increase value of the soil stratification.
[0104] In one embodiment, the temperature adjustment strategy is used to characterize the start and stop of the power supply component to the heating wire and the control of the heating temperature of the heating tube. Specifically, the power supply component is controlled to start and stop according to the temperature adjustment strategy, thereby controlling the heating temperature of the heating tube.
[0105] In another embodiment, the temperature adjustment strategy is used to characterize the way the power supply component adjusts the power supply parameters of the heating wire, and to control 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.
[0106] In another embodiment, the temperature adjustment strategy includes power supply parameters for the power supply component to supply power to the heating wire, and control of the heating temperature of the heating tube. Specifically, the power supply parameters of the power supply component are adjusted to the power supply parameters in the temperature adjustment strategy, thereby controlling the heating temperature of the heating tube.
[0107] In this embodiment, by uniformly laying the heating pipes in layers and heating the liquid based on the heating wire, the heating pipes achieve soil warming through heat conduction. The warming process is gentle, stable, and uniform, avoiding damage to the plant roots. At the same time, the soil disturbance during the laying of the heating pipes is minimal, reducing the impact on the experimental results of the warming simulation and ensuring the accuracy of the experimental results.
[0108] Furthermore, based on independent temperature control for different soil layers, corresponding temperature thresholds can be set according to the temperature control requirements of each layer. This allows for independent temperature control of soil layers at different depths as needed, preventing the heating element temperature from being too high and damaging nearby vegetation, or too low and affecting the soil warming effect. During the temperature control process, dynamic adjustment of the heating temperature is achieved based on the sensing of the heating element temperature and the soil temperature, resulting in gentle and stable warming and ensuring the desired warming effect.
[0109] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.
[0110] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.
[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate 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 element is used to heat the soil in a simulated area. The heating element comprises multiple segments, which are laid in layers according to soil depth in the simulated area. The segments in each layer are laid continuously and uniformly. The heating element includes an insulating tube and a heating wire passing through the insulating tube. In each layer obtained by laying multiple segments, the vertical distance between two adjacent layers changes in a gradient. A power supply assembly is used to supply power to the heating wire when the insulating tube is filled with liquid, and the heating wire heats the liquid in the insulating tube when energized; A temperature controller is used to control the heating temperature of the heating tube, wherein the heating temperature of the heating tube segments in different layers is determined according to the soil depth of the layer. The temperature controller includes multiple controllers, each of which is connected in layers to one of the heating tubes in the simulation area, and is used to independently control the heating temperature of the heating tube segments in the layered heating tubes. The temperature controller is also used to set temperature thresholds, which include an upper threshold and a lower threshold. The temperature controller is also used to collect the liquid temperature and soil temperature inside the heating tube; determine a temperature adjustment strategy based on 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. The temperature controller includes a first temperature probe and a second temperature probe. The first temperature probe is disposed inside the heating tube and is used to collect the liquid temperature inside the heating tube. The second temperature probe is disposed outside the heating tube and is used to collect the soil temperature in the simulated area. Any of the temperature controllers includes a plurality of first temperature probes, which are evenly arranged within the heating tube segment corresponding to the temperature controller. The average value of the liquid temperature collected by each first temperature probe is the liquid temperature within the heating tube segment. Each of the temperature controllers includes a plurality of second temperature probes, which are evenly arranged within the heating tube layer corresponding to the temperature controller. The average soil temperature collected by each second temperature probe is the soil temperature collected for the heating tube layer.
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 multiple heating wire segments in series using male and female terminals.
3. The field soil warming simulation device according to claim 1, characterized in that, It also includes water pumps and pressurized water pipes, of which: 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 pipe through the pressurized water pipe; the pressurized water pipe is used to discharge gas from the liquid.
4. A method for simulating soil warming in the field, characterized in that, Using the field soil warming simulation device as described in any one of claims 1 to 3, the field soil warming simulation method includes: Multiple segments of the heating tube are laid in layers according to soil depth within the simulated area to obtain multiple soil layers within the simulated area; the segments are laid continuously and uniformly in the soil layers; the heating tube includes an insulating tube and a heating wire passing through the insulating tube; After filling the insulating tube with liquid, the heating wire is powered by a power supply assembly to heat the liquid inside the insulating tube. The heating temperature of the heating tube is controlled to control the temperature increase of the soil stratification.
5. The method for simulating soil warming in the field according to claim 4, characterized in that, Controlling the heating temperature of the heating tube to control the temperature increase of the soil stratification includes: The temperature of the liquid inside the heating tube and the temperature of the soil in the soil layers are collected. A temperature adjustment strategy is determined based on the liquid temperature, the soil temperature, and a preset temperature threshold. The heating temperature of the heating tube is controlled according to the temperature adjustment strategy to control the temperature increase value of the soil stratification.