18 results about "Moisture distribution" patented technology

This invention discloses a microwave drying uniformity optimization strategy based on COMSOL simulation: S1, establish a three-dimensional numerical simulation model of electromagnetic field and heat, mass transfer and velocity field using COMSOL; S2, COMSOL simulates the model using a preset "constant microwave power strategy"; simulates and analyzes the temperature, moisture distribution and microwave energy absorption law inside the material under constant microwave power; S3, COMSOL simulates the model using a preset "intermittent variable microwave power strategy"; simulates and analyzes the temperature, moisture distribution and microwave energy absorption law inside the material under constant microwave power; S4, verify the accuracy and data consistency of the simulation conclusions of "S2" and "S3" through experiments; if the simulation conclusions and data deviate too much from the experimental conclusions and data, return to "S1" and re-optimize the three-dimensional numerical simulation model; thus achieving a significant improvement in the microwave drying uniformity of raspberry pulp.

The present application relates to the technical field of detection and optimization of oil paper insulation material, and provides a method and system for determining moisture distribution in oil paper insulation under different temperature fields, which comprises the following steps: an oil paper insulation state evaluation step: a physical model of the oil paper insulation is established, and insulation performance indexes of the oil paper insulation are calculated based on historical operation data and the physical model; a moisture distribution determination step: the distribution of moisture in the oil paper insulation is analyzed based on the insulation performance indexes, and if the deviation of the moisture distribution from an expected distribution is greater than a first threshold value, a detection or treatment strategy is adjusted so that the deviation of the moisture distribution in the oil paper insulation from the expected distribution is less than or equal to the first threshold value; an insulation performance optimization step: if the insulation performance of all the oil paper insulation meets a predetermined standard, the detection ends; otherwise, the insulation performance of a region to be optimized is optimized, and the moisture distribution determination step is returned; the present application can effectively guarantee the reliability of the oil paper insulation and prolong the service life thereof.

The application discloses a method for observing water distribution in a rock sample by using a splitting test, and comprises the following steps: (1) drying the rock sample; (2) preparing a dyeing agent for soaking the rock sample, selecting a dyeing agent with high contrast with the original color of the rock and a proper dye mass concentration; (3) soaking the rock sample in the dyeing agent; (4) smearing the surface of the rock sample with paraffin; (5) placing the rock sample in a splitting test device to perform the splitting test; and (6) placing the rock sample split into two halves in a place with sufficient light and taking a photo for storage. The method can avoid the problems of a large amount of heat generated in a traditional cutting mode and a long time consumption of nuclear magnetic resonance imaging, thereby affecting the water distribution in the rock, and has the advantages of simple operation and the effect of directly observing the real water distribution in the rock sample.

This utility model discloses a Buddha's Hand citron planting and cutting device, belonging to the field of Buddha's Hand citron planting and cultivation technology. The Buddha's Hand citron planting and cutting device includes a barrel body with cutting holes spaced apart along the circumference of the barrel body. A guide pipe is fixedly installed inside the barrel body, and water permeable holes are fixedly installed on the guide pipe at intervals. It also includes a cover plate that is fastened to the barrel body, and a water chamber is fixedly installed on the cover plate. A sealing cap is threaded onto the water chamber, and the water chamber is sealed to the guide pipe. A water inlet pipe is fixedly installed on the sealing cap for connecting to an external water source. Because the cutting holes are evenly distributed around the circumference, a reasonable spacing between the cuttings can be ensured, avoiding mutual shading and affecting ventilation and light. The water in the water chamber flows into the spiral guide pipe through a flexible tube, flows slowly in the guide pipe, and gradually seeps into the seedling substrate through the water permeable holes on its surface, forming a stable and moist rooting environment. The design of the spiral guide pipe effectively extends the water flow path, making the water distribution more uniform.

This application provides a soil testing and sampling system and method. The system involves scanning a target soil testing area to acquire multispectral images of the area; dividing the target soil testing area into multiple soil monitoring strata based on the multispectral images and determining the soil moisture distribution map; identifying sampling points for each soil monitoring stratum; extracting multispectral information from the multispectral images to obtain the multiscale spectral characteristics of each sampling point; optimizing and retrieving soil moisture content using all multiscale spectral characteristics and the soil moisture distribution map to obtain key sampling points for each soil monitoring stratum; determining the sampling path for the target soil testing area based on all key sampling points; and controlling the sampling equipment to sample the soil along the sampling path. Using this method, soil monitoring and sampling can be conducted even in environments with severe vegetation cover and high spatial heterogeneity, based on the soil moisture distribution.

This invention discloses a sprinkler irrigation control method based on communication link attenuation inversion, belonging to the fields of agricultural automatic sprinkler irrigation technology and wireless communication engineering technology. The method includes: deploying multiple fixed communication nodes in farmland to form a mesh link; each node sequentially sending ranging signals and recording the actual received power of each link; calculating the theoretical power using a free-space loss model to obtain the additional attenuation; discretizing the farmland into a three-dimensional voxel grid and establishing a system of linear equations relating the attenuation to the voxel attenuation coefficient; solving the equations using an algebraic iterative reconstruction algorithm to obtain the soil moisture distribution matrix within the farmland; identifying regions based on the moisture distribution and generating differentiated sprinkler irrigation commands; and controlling the electromagnetic valves of each zone via a wireless network to perform variable-volume sprinkler irrigation. This invention eliminates the need for buried soil moisture sensors, utilizes communication link tomography technology to obtain a true three-dimensional moisture field, is unaffected by weather, achieves precise closed-loop sprinkler irrigation, and significantly improves water-saving efficiency and crop uniformity.

This invention discloses a wet generator, its preparation method, and its application. The wet generator comprises a conductive carbon cloth divided into dry and wet zones. A negative electrode is disposed at the bottom of the wet zone, and a gel layer and a radiation-cooling fiber layer are sequentially disposed at the top from bottom to top. A positive electrode is disposed at the bottom of the dry zone. A wire connects the positive and negative electrodes. The gel layer is lithium chloride-doped polyvinyl alcohol gel (PVA-LiCl), and the radiation-cooling fiber layer is made by electrospinning a blend of TPU, SiO2, and PVDF. Dividing the conductive carbon cloth into dry and wet zones, and constructing a vertical wet-dry gradient in the wet zone using the gel layer and radiation-cooling fiber layer, and then constructing an in-plane wet-dry gradient with the dry zone of the conductive carbon cloth, the superposition of the "vertical + in-plane" dual gradients maintains a continuous and high wet-dry gradient. This avoids interruption of power output due to uniform moisture distribution after LiCl saturation, thus ensuring that the wet generator has high and continuous power generation efficiency, suitable for environments with high temperature and wide humidity ranges.

This application provides a method and system for intelligent control of irrigation in forage planting. Based on the humidity distribution characteristics of the target forage planting area and the water stress index of the target forage, a regional soil moisture distribution map is constructed, and the effective utilization coefficient of irrigation water in each grid area of ​​the regional soil moisture distribution map is determined. Confidence decisions are made on the irrigation amount for each grid area within the future irrigation window period using each effective utilization coefficient and the water requirement threshold of each growth stage of the target forage. Based on these confidence decisions and the hydraulic constraints of the irrigation equipment, the irrigation travel path and valve opening of the irrigation equipment are optimized through multi-objective collaboration, generating an irrigation instruction set including irrigation sequence, travel speed, and valve control parameters, driving the irrigation equipment to perform variable irrigation operations. Based on the above scheme, variable irrigation decision-making based on multi-source data fusion and multi-objective collaboration can be achieved.

The present application belongs to the technical field of chemical experiment, and particularly relates to a chemical drying experiment method based on thermal imaging technology. The present application is to solve the limitation that the traditional drying experiment method can only be based on mass determination. Through the thermal imaging technology, the surface temperature θ data and the surface temperature distribution image results of the dried material are determined along with the drying time τ in the drying process. Combined with the measurement results of the mass G change of the wet material in the drying process, the change law of the material surface temperature distribution and the moisture distribution is analyzed, and the heat transfer and mass transfer characteristics of each stage of the drying process and the verification of the basic principle of drying are carried out. The present application can be applied in the "drying experiment" teaching process of the chemical principle experiment course. Not only the content of θ-τ relationship curve determination in the drying curve can be improved, but also the knowledge coverage of the experiment can be enhanced. Furthermore, the understanding of the heat transfer, mass transfer characteristics and basic principles of different stages in the drying process can be further strengthened.

The application discloses a kind of for Baijiu raw material segmented variable pressure variable temperature coordinated regulation and control steaming and stewing grain process, belong to Baijiu brewing technical field.The process sequentially includes: S1 multistage variable pressure initial steaming, and grain is treated in 0.25-0.30 MPa high pressure, 0.15-0.20 MPa medium pressure, 0.05-0.10 MPa micro-pressure steam environment in turn;S2 multistage gradient stewing grain, 85-95 ℃ high temperature, 75-85 ℃ medium temperature, 65-75 ℃ low temperature water is sprayed to grain in turn, and each section spraying water amount respectively accounts for 20-30%, 50-60%, 15-25% of stewing grain total water addition amount, and stewing grain total water addition amount is 120-160% of raw material absolute dry weight;S3 constant pressure redistillation and open steaming, first redistillation under 0.01-0.05 MPa micro-positive pressure, and then atmospheric pressure open steaming.The application solves the problems of traditional process grain fragrance easy loss, uneven gelatinization, poor moisture distribution by the timing and parameter coordination of "variable pressure-temperature-variable", realizes grain fragrance high retention, uniform gelatinization, consistent moisture, and simultaneously has excellent raw material adaptability and batch stability, suitable for clear type Baijiu large-scale standardized production.

The utility model provides a kind of spraying structure for concrete slab maintenance, it is related to concrete slab maintenance field, comprising: support plate, the support plate bottom four corners are all fixedly connected with a support leg, and the lower end of each support leg is equipped with a universal wheel;The support plate bottom front side is equipped with reciprocating drive assembly. By setting reciprocating drive assembly, when the surface of concrete slab is watered, it can drive spraying pipe left and right reciprocating movement, so that moisture is more evenly distributed on the surface of concrete slab, at the same time, without staff holding spraying pipe during spraying process, it can be watered on the surface of concrete slab, so as to save time and effort, reduce labor intensity;Solve the current concrete slab maintenance mostly adopts artificial watering method, staff holding spraying pipe structure waters on its surface, not only time-consuming and labor-consuming, labor intensity is big, and water spraying uniformity is poor, so that the moisture distribution on the surface of concrete slab is uneven.

The present application relates to the technical field of building materials, in particular to a kind of ultrafine powder composite high-strength non-shrinkage grouting material, which is composed of dry powder and mixed water, the dry powder includes main material, reinforcing material and functional additional material; the present application combines four typical solid wastes, i.e., construction waste regeneration powder, waste glass powder, waste plastics and agricultural straw waste, through specific physical and chemical treatment and ultrafine co-milling process, and granulates them into porous functional particles with specific functions; the design not only greatly improves the problem of low utilization rate of single solid waste, but also changes it from simple filler to active component capable of actively improving the microstructure of slurry and adjusting moisture distribution through functional design; this significantly reduces the dependence of grouting material on natural sand and high-performance mineral admixture, conforms to the development direction of green building materials, reduces the cost of raw materials, and realizes the unity of environmental and economic benefits.

The application relates to the technical field of agricultural breeding, and discloses a breeding method and system of Chinese yam seedlings and a storage medium. The method comprises the following steps: acquiring soil water content data of seedling beds through a sensor network to construct an initial data set; processing data by using a classification model based on the initial data set to determine water state categories of the seedling beds; generating a water distribution pattern in combination with spatial position information of the seedling beds; calculating water content gradient differences of adjacent beds according to the water distribution pattern to determine potential problem areas; extracting potential problem area data and integrating historical data to construct a structured data set, and predicting a water change trend through trend analysis; generating a regulation scheme suitable for root growth according to the water change trend to determine a water regulation instruction sequence; sending a control signal to an irrigation system, acquiring feedback, and updating a database. The application solves the problems of uneven water content and uncontrollable risks in Chinese yam seedling, improves seedling quality, and achieves the effect of promoting seedling and strengthening roots.

The application discloses a water-retaining sand hydrophobic performance detection method and system based on impedance tomography, and belongs to the technical field of material performance electrical detection. The method comprises the following steps: filling a water-retaining sand sample into an insulating annular container and compacting, injecting liquid simulation water into the center to simulate dynamic seepage of water, collecting boundary voltage data to generate a global impedance data set, constructing a conductivity distribution inversion model to solve internal conductivity distribution, outputting a global conductivity matrix of the water-retaining sand, generating a time-series conductivity evolution image sequence, establishing a calibration mapping relationship between conductivity and water content, converting the water content pixel by pixel to generate a time-series distribution cloud image, extracting water content statistical features, calculating water seepage rate, radial diffusion coefficient, global circumferential segregation degree and hydrophobic retardation factor to form a hydrophobic performance quantitative feature set, grading the water-retaining sand hydrophobic performance and identifying abnormal areas to form a hydrophobic performance detection report, and realizing integrated nondestructive characterization of internal water distribution, dynamic seepage and hydrophobic uniformity of the water-retaining sand.

The utility model discloses a kind of drip irrigation type ceramic flowerpots, including ceramic pot, the bottom of the ceramic pot is equipped with pressurized water storage unit, the pressurized water storage unit is connected with the ceramic pot by connecting seat, drip irrigation water unit is equipped on the outside of the pressurized water storage unit. A kind of drip irrigation type ceramic flowerpot provided by the utility model, through the pressurized water storage unit of bottom and the drip irrigation water unit of surrounding arrangement collaborative work, through the gravity effect of ceramic pot itself can promote piston sliding, and water is slowly, continuously directly delivered to soil. Multiple drip irrigation water units are distributed along the circumferential direction of water storage base equidistantly, ensure that moisture can evenly, stably seep from multiple points, overcome the uneven distribution of moisture caused by manual watering concentrated in one point.

This utility model discloses a moisture-wicking knitted fabric, relating to the textile field. The key technical points are: it includes a base layer comprising a first yarn and a second yarn; any first yarn forms a sparse weave on a single warp; the minimum weave cycle of the second yarn spans at least three stitch lengths in the transverse direction; and any first yarn is connected to at least two second yarns. In this utility model, the island fiber bundles have a porous structure, which increases the moisture-wicking speed of the first yarn through capillary effect. Moisture is rapidly transferred longitudinally through the first yarn to different positions on two adjacent second yarns, and then diffuses laterally along the second yarns. By distributing moisture, the moisture distribution slows down the partial humidity saturation of the knitted fabric, thereby increasing the moisture absorption speed of the fabric. The second yarn has a longer path length and a larger moisture-wicking area, increasing the effective moisture-wicking area and thus improving the moisture-wicking capacity of the knitted fabric.