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743 results about "Relative humidity" patented technology

Relative humidity (RH) is the ratio of the partial pressure of water vapor to the equilibrium vapor pressure of water at a given temperature. Relative humidity depends on temperature and the pressure of the system of interest. The same amount of water vapor results in higher relative humidity in cool air than warm air. A related parameter is that of dew point.

Intermediate and high voltage switch cabinet internal humidity inversion calculation method based on simulation analysis

The invention belongs to the technical field of simulation analysis, and particularly relates to a medium-high voltage switch cabinet internal humidity inversion calculation method based on simulation analysis, which comprises the following steps: establishing a geometric model of a switch cabinet, importing the geometric model into finite element simulation software to obtain a simulation analysis model, adding each physical field and computational domain and boundary conditions thereof, and calculating the internal humidity of a medium-high voltage switch cabinet. All the physical fields are coupled, and mesh generation is carried out; performing numerical solution on the simulation analysis model by using a transient solver to obtain a temperature and humidity distribution condition in the switch cabinet; the simulation analysis model is optimized, a simulation data set is constructed, and a PINN is trained; based on the environment temperature and humidity and the operation current collected in the actual operation of the switch cabinet, the trained PINN is used for prediction, and the steady-state relative humidity of the current transformer is obtained. According to the invention, based on the limited boundary monitoring data, efficient and accurate reconstruction of the humidity field of the key area in the switch cabinet is realized, and a feasible path is provided for equipment state sensing and condensation risk early warning.
Owner:SHANDONG UNIV OF TECH

Process for the production of hydrogen from methanol

The present application relates to hydrogen production technology field, especially to a kind of methanol hydrogen production method, comprising the following steps: S10: methanol water is heated and vaporized to obtain methanol water vapor;S20: methanol reforming reaction obtains hydrogen mixture gas;S30: after cooling treatment to hydrogen mixture gas, through water washing tower absorption unreacted methanol water, then, adjust the relative humidity and temperature of hydrogen mixture gas;S40: hydrogen mixture gas is input into carbon dioxide absorption tower to remove carbon dioxide;S50: after removing carbon dioxide, product hydrogen is obtained and input hydrogen tank storage to supply user end.The above-mentioned methanol hydrogen production method, by methanol water vapor reforming hydrogen treatment, obtains hydrogen mixture gas.Again, hydrogen mixture gas is purified to obtain product hydrogen with very low carbon monoxide content, with raw material easy to transport, the hydrogen purity of output is high, equipment construction cost is low, and energy consumption is low and the like advantages, reach the purpose of expanding hydrogen application range.
Owner:GUANGDONG LANJIU NEW ENERGY TECH CO LTD

Big data-based deicing control method for electric heating film of existing wind power blade

The invention discloses an existing wind power blade electrothermal film deicing control method based on big data, and relates to the technical field of wind turbine generator operation control and ice prevention and removal. Frost ice / glaze ice probability output by an ice type discrimination model does not only give an alarm any more, but is directly converted into an increase / decrease coefficient constrained by boundary and monotonicity; energy can be fully put in a glaze ice scene, and overheating and over-consumption can be avoided in a frost ice scene; according to the method, the change trend of wind speed, temperature and relative humidity is introduced as modulation factors, the working condition of forming / turning glaze ice is responded in advance, and insufficient deicing caused by static threshold hysteresis is reduced; according to power deviation correction, a unit wind speed-power curve serves as a reference, a dead zone, segmented gain and accumulative saturation structure is adopted, on the premise of not depending on an external icing sensor, extrinsic performance of pneumatic degradation is closed into controlled quantity, sensitivity and stability are considered, and start-stop oscillation and duration drift are reduced.
Owner:BEIJING JINGGUANG WEIYE TECH CO LTD

Hot riveting welding head synchronous temperature control method and system based on temperature change rate

The invention relates to the technical field of welding, in particular to a hot riveting welding head synchronous temperature control method and system based on the temperature change rate, and the method comprises the steps: executing full-power heating pulse triggering operation on a welding head, calculating the pulse duration according to a start timestamp and an end timestamp, calculating the temperature rise, and eliminating peak noise through a digital filtering algorithm; environment temperature and relative humidity are collected in real time, and equivalent heat capacity is calculated; the initial temperature difference between any welding heads is calculated, and a dynamic target temperature curve is constructed; and calculating an actual temperature change rate, synchronously extracting a target change rate of the dynamic target curve at a corresponding moment, calculating a change rate deviation between the two change rates, judging whether intervention adjustment is needed or not, calculating an output signal by using an incremental PID algorithm if intervention adjustment is needed, and adjusting the heating power according to the output signal. According to the scheme, the stability of the hot riveting welding quality is effectively improved by accurately quantifying the thermal characteristics of the heterogeneous welding head, dynamically planning a personalized temperature rising track and performing high-frequency closed-loop regulation and control.
Owner:ZHEJIANG XIANDA TECH CO LTD

Water seepage prevention early warning system driven by edge calculation in complex temperature and humidity environment

The invention relates to the technical field of pipeline safety monitoring and water seepage prevention early warning, in particular to a water seepage prevention early warning system driven by complex temperature and humidity environment edge calculation, which comprises the following modules: an environment and water immersion data acquisition module used for acquiring temperature, relative humidity, water immersion signals and auxiliary evidence in real time at edge nodes and performing preprocessing; and the temperature and humidity coupling dew point judgment module is used for calculating a dew point at the edge node based on the temperature and humidity data and generating condensation negative evidence. According to the method, temperature and humidity and water immersion data are collected at edge nodes and preprocessed, condensation negative evidence is generated based on the temperature and humidity data and fused with water immersion positive evidence to form a Markov chain, meanwhile, an environment base line is established, and a threshold value is adjusted in a self-adaptive mode, so that continuous monitoring and closed-loop judgment of the water seepage state are achieved; therefore, the problems that most traditional pipeline water seepage monitoring systems depend on a remote server, and judgment lags and misinformation is caused by the complex environment and the static threshold value are solved.
Owner:JINAN JINYUE HIGHWAY ENGINEERING CO LTD

Rice drying moisture content fusion prediction method based on stage perception residual learning

The invention relates to a phase perception residual learning-based rice drying moisture content fusion prediction method, which comprises the following steps of: acquiring multi-dimensional data in a rice drying process, preprocessing, dividing three drying phases based on a change rate of relative humidity of waste gas, and continuously optimizing; an improved Page model is constructed, drying coefficients k and n are fitted in stages, k is associated with the hot air temperature through an Arrhenius formula, n is associated with the hot air temperature through a quadratic equation, and a physical baseline predicted value is generated after parameters are optimized through a deep bed test; calculating a residual error between the actual moisture content and the physical baseline, and training the LSTM network by taking the residual error as a target to enable the LSTM network to learn nonlinear features which cannot be described by a physical model; and fusing the physical baseline of the improved Page model and the residual error predicted by the LSTM to obtain a final fusion prediction result. The method not only ensures the physical rationality of the prediction result, but also improves the precision and generalization ability, and is suitable for intelligent regulation and control of the rice drying process.
Owner:HEILONGJIANG BAYI AGRICULTURAL UNIVERSITY

Evapotranspiration component prediction method, system, equipment and medium

The invention relates to an evapotranspiration component prediction method, system and device and a medium. The method comprises the following steps: acquiring four types of meteorological elements, including net radiation, air temperature, wind speed and relative humidity, influencing evapotranspiration components in a target area, and screening core meteorological elements in combination with area vegetation coverage and soil moisture retention characteristics; constructing a core meteorological element historical simulation sequence, comparing the core meteorological element historical simulation sequence with a corresponding historical observation sequence to calculate a Pearson's correlation coefficient, determining an initial fusion prediction value based on the coefficient, applying an emergence constraint, and generating a core meteorological element future prediction sequence; inputting the prediction sequence into a hydrological cycle model for simulation and correction to obtain a future soil moisture prediction result of the target area; and jointly inputting the future prediction sequence of the core meteorological elements and a future soil moisture prediction result into the double-layer evapotranspiration model, outputting and correcting a primary evapotranspiration component sequence, and finally obtaining an adjusted evapotranspiration component sequence. The method can improve prediction precision and stability.
Owner:XIAN UNIV OF TECH

Method and system for automatically adjusting temperature and humidity of biological oil and fat storage tank

The invention belongs to the technical field of adjusting systems of grease storage tanks, and particularly relates to an automatic temperature and humidity adjusting method and system for a biological grease storage tank, and the method comprises the steps: obtaining the operation data and the current oil temperature of storage tank conveying equipment, and constructing a rheological resistance index; an integral mechanism with time as the axis is established, the accumulated thermal stress of the grease in the whole life cycle is calculated according to the current oil temperature and the preset sampling period, and the accumulated thermal stress is used for representing the sum of thermal damage borne by the grease in the storage period; calculating a target temperature at the current moment based on the rheological resistance index and the accumulated thermal stress; and the environment relative humidity and the environment temperature are collected, environment coupling correction is carried out on the target temperature according to the environment relative humidity and the environment temperature, and closed-loop control is carried out on the storage tank by taking the corrected temperature as a final set value. According to the invention, the heating strategy can be adaptively adjusted according to the rheological resistance and accumulated thermal stress of grease, and active defense can be realized in a high-humidity environment.
Owner:LUOYANG HENGJIU BIOENERGY CO LTD +1

Compressor temperature control system capable of preventing generation of condensate water

The invention relates to the technical field of compressor temperature control, and discloses a compressor temperature control system capable of preventing generation of condensate water, which comprises a sensing module, an execution module and a controller. The sensing module is used for collecting air temperature, relative humidity, system working pressure and circulating oil temperature parameters of the compressor in real time. The controller is configured to calculate the current pressure dew point of the system based on the air temperature, the relative humidity and the working pressure of the system; the pressure dew point serves as a floating lower limit, a preset system optimal working temperature upper limit serves as a fixed upper limit, and a dynamic safe working interval is determined; finally, a cooling unit and a heating unit in the execution module are cooperatively controlled to work according to the relation between the circulating oil temperature and the dynamic safety working interval. By establishing the dynamic safety lower limit changing along with the working condition, the problem that the compressor is prone to generating condensate water under the high-humidity or low-load working condition to cause oil emulsification is effectively solved, and accurate and energy-saving temperature control is achieved.
Owner:KOBELCO COMPRESSORS MFG (SHANGHAI) CORP

Greenhouse climate multi-target intelligent control method fusing rule constraint and reinforcement learning

The invention discloses a greenhouse climate multi-target intelligent control method fusing rule constraint and reinforcement learning, and relates to the technical field of agricultural environment control, and the method comprises the following steps: building a temperature and humidity dynamic model based on an energy conservation law, and coupling an external environment disturbance term to obtain a temperature and humidity dynamic model; establishing a mapping relation among the temperature, the relative humidity and actuator input data, generating multiple groups of interval training data based on the mapping relation, constructing an intelligent decision model, and screening out an optimal actuator state vector by taking the deviation degree of an environment target value and an interval range as an evaluation criterion; and setting a difference mediation threshold value of mutual exclusion operation for safety correction, adopting environment adjustment difference and energy consumption minimization as optimization objectives, designing a multi-objective reward function, and determining an optimal control instruction, thereby updating an intelligent decision-making model, realizing accurate and efficient greenhouse climate control, enabling the comprehensive control of temperature and humidity to be more accurate and reasonable, and improving the reliability of the greenhouse climate control. And the energy consumption is reduced.
Owner:LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY

Intelligent lightning arrester capable of monitoring lightning current and monitoring method

The invention belongs to the technical field of lightning current monitoring, and particularly discloses an intelligent lightning arrester capable of monitoring lightning current and a monitoring method, which have the beneficial effects that localized operation calculation is performed through a rule engine, the diagnosis time consumption can be reduced, sampling can be quickly triggered through a dynamic threshold value, communication is performed through a dual-mode communication module, and the intelligent lightning arrester capable of monitoring the lightning current can be used for monitoring the lightning current. Therefore, timely data detection and real-time alarm can be realized, the characteristic extraction unit is used for extracting peak current Ip, wavefront time Tf, wave tail time Tt and oscillation index Oi to realize full coverage of waveform characteristics, and the life evaluation unit is used for calculating accumulated damage and residual life percentage of the equipment to realize full coverage of the waveform characteristics. The trigger threshold value of the current is calculated through the threshold value calculation formula according to the environment temperature and the relative humidity detected by the temperature and humidity sensor, accurate monitoring is achieved, and the situation of false alarm is avoided.
Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +2

Material corrosion-oriented surface microenvironment multi-parameter sensing method and system

The invention discloses a material corrosion-oriented surface microenvironment multi-parameter sensing method and system, which realize real-time monitoring of a plurality of key physical and chemical parameters by arranging a micro sensing probe array on the surface of a material. And constructing a space-time parameter matrix by using the obtained data, calculating the time change rate of each parameter, and setting a disturbance threshold value to mark an abnormal point. A disturbance area is identified through spatial clustering of abnormal points, corrosion activity indexes are defined in combination with temperature, relative humidity, electrochemical driving force, local acidification degree and chloride ion concentration, and a continuous corrosion activity distribution diagram is generated. And tracking a spatial overlapping relation of the disturbance area to form an evolution chain, and predicting a future expansion trend. And finally generating a comprehensive report containing a corrosion activity space-time overview map, a key event timeline and a regional risk grading list. The accuracy and efficiency of corrosion monitoring are improved, and a scientific basis is provided for preventive maintenance.
Owner:SOUTHWEST TECHNICAL ENGINEERING RESEARCH INSTITUTE OF CHINA SOUTH IND GROUP

Transient operation method for separation device

A transient operation method for a separation device includes a separation membrane complex including: a separation membrane; and a substrate arranged on one side of the separation membrane, the separation device having a first flow path and a second flow path, the first flow path being positioned on a side closer to the separation membrane of the separation membrane complex, the second flow path being positioned on a side closer to the substrate of the separation membrane complex, the transient operation method including supplying gases to the first flow path and the second flow path, respectively, and heating the separation membrane complex. An average relative humidity of a gas A supplied to the first flow path is higher than an average relative humidity of a gas B supplied to the second flow path.
Owner:NGK INSULATORS LTD

Anti-condensation control method for air conditioner and air conditioner

The invention provides an air conditioner anti-condensation control method and an air conditioner. The method comprises the steps that the absolute moisture content D and the dew point temperature Td of air are calculated according to the outdoor unit environment temperature Ta and the outdoor unit environment relative humidity phi so as to judge whether anti-condensation starting conditions are met or not, and when the anti-condensation starting conditions are met, the initial energy requirement Q of a compressor is determined according to the shutdown interval time m; the target parameters are periodically refreshed; the compressor refrigerating capacity q is obtained based on the target parameters, the actual dehumidification capacity Dx is determined based on the compressor refrigerating capacity q, and the dynamic dew point temperature Tdn is obtained according to the actual dehumidification capacity Dx; and updating the real-time compressor energy demand Qn and the anti-condensation operation time Hn based on the dynamic dew point temperature Tdn so as to adjust the rotating speed of the compressor. Under the condition that the indoor unit and the outdoor unit do not communicate with each other, the outdoor unit can perform fuzzy control to perform anti-condensation protection; and refrigeration load output adjustment can be carried out in real time according to different humidity, and it is guaranteed that condensation is avoided and rapid cooling can be achieved.
Owner:GUANGDONG ABOS TECHNOLOGY CO LTD

Fresh air dehumidification energy-saving control method and system

The invention provides a fresh air dehumidification energy-saving control method and system, and relates to the technical field of fresh air dehumidification energy-saving control, the outdoor temperature, the outdoor relative humidity and the actual personnel number of an independent control area are obtained in real time and compared with the preset personnel number, and the number deviation is determined; when the quantity deviation meets a preset deviation threshold value and the outdoor temperature and humidity meet preset conditions, the target fresh air volume can be calculated according to the actual personnel quantity, the total fresh air volume is divided into first fresh air and second fresh air, the first fresh air is guided to a chilled water coil pipe for cooling and dehumidification, and the second fresh air is guided to a chilled water coil pipe for cooling and dehumidification; the first fresh air bypasses the chilled water coil pipe through the bypass air duct and is not cooled and dehumidified, the second fresh air bypasses the chilled water coil pipe through the bypass air duct and is not cooled and dehumidified, and then the cooled and dehumidified first fresh air and the second fresh air are mixed and conveyed to the variable air volume valve box for air volume adjustment. And a remarkable energy-saving effect and better user experience are achieved.
Owner:GUANGDONG LIYI MECHANICAL & ELECTRICAL EQUIP ENG CO LTD

Heating control method for engine gas delivery pipeline of marine gas generator set

The invention discloses a heating control method for an engine gas delivery pipeline of a marine gas generator set, which relates to the technical field of marine gas power systems, and comprises the following steps: collecting multi-dimensional environment state information of the gas delivery pipeline in real time, analyzing gas components and pressure fluctuation data, and calculating the temperature of the gas delivery pipeline; a theoretical dew point temperature and a potential paraffin precipitation temperature under real-time pressure are calculated by combining a fuel gas physical property database, a real-time heat exchange model is constructed by combining a pipeline outer wall temperature gradient and a cabin environment temperature, theoretical temperature attenuation curves of different positions of fuel gas in a pipeline are obtained, condensation and paraffin precipitation risk positions and degrees are predicted after comparison, and a real-time heat exchange model is established. And differential electric heat tracing control strategies of different sections of the pipeline are generated in combination with relative humidity data of the cabin. The method can adapt to the real-time physical property of gas and the heat exchange state of the pipeline section, and the heating control execution mode of the gas pipeline is optimized.
Owner:WEIFANG HUAZHONG POWER EQUIP CO LTD

Air conditioner and control method and device thereof, storage medium and computer program product

The invention discloses a control method and device of an air conditioner, the air conditioner, a storage medium and a computer program product, and the method comprises the steps that in the refrigeration operation process of the air conditioner, whether the current environment is in a temperature and humidity state needing preferential dehumidification or not is determined according to the indoor environment temperature and the indoor relative humidity; if it is determined that the current environment is in the temperature and humidity state needing preferential dehumidification, the frequency of a compressor and the rotating speed of an inner fan are adjusted, and the air conditioner executes dehumidification operation; after the dehumidification operation is completed, the environment dew point temperature is calculated based on the indoor environment temperature and the indoor relative humidity; dynamically adjusting the running frequency of the compressor and the rotating speed of the inner fan according to the environment dew-point temperature and the evaporator surface temperature to enable the evaporator surface temperature to be higher than the environment dew-point temperature. According to the scheme, the anti-condensation response speed is increased, the control precision and the environmental adaptability are improved, and the balance of efficient dehumidification and stable anti-condensation is achieved.
Owner:ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION

Equal-state air supply air conditioning method, system, medium and equipment

The invention discloses an air conditioning method and system for equal-state air supply, a medium and equipment, and belongs to the technical field of air conditioning equipment. The method comprises the steps that on the basis of the indoor design temperature, the indoor design relative humidity, the indoor heat load and the indoor humidity load, the heat-humidity ratio parameter is calculated, and the target temperature value of an equal-state air supply point is determined on an enthalpy humidity diagram; real-time temperature data of the air supply outlet of the fresh air handling unit and the air supply outlet of the fan coil are obtained and compared with the target temperature value, and a corresponding fresh air temperature deviation value and a corresponding return air temperature deviation value are generated; and according to the fresh air temperature deviation value and the return air temperature deviation value, the opening degrees of adjusting valves of the fresh air handling unit and the fan coil are adjusted, so that the air supply temperature of the fresh air handling unit and the air supply temperature of the fan coil are both maintained at the target temperature value. By implementing the method, the technical problem that in the prior art, accurate temperature and humidity control and refrigeration system energy efficiency improvement of a traditional air conditioning system in the high-temperature and high-humidity area high-humidity environment are difficult to achieve at the same time can be solved.
Owner:GUANGZHOU DESIGN INST +2

A climate control system and method based on the metabolic state of the mushrooms in the mushroom house

The present application belongs to the technical field of factory planting of mushrooms, and particularly relates to a climate control system and method based on the growth and metabolism of mushrooms in a mushroom house, which comprises: a supply air temperature sensor, a supply air relative humidity sensor, a supply air carbon dioxide sensor, a supply air volume sensor, a house temperature sensor, a house relative humidity sensor, a house carbon dioxide sensor, a mushroom house climate control module, a house supply air distribution pipe, a pressure-regulated air outlet, mushroom culture material, a mushroom house air conditioning device, a supply air pipe, a return air pipe, a mushroom house, and a mushroom planting bed frame. The present application measures and calculates the metabolic rate, the release rate, and the parameter value of the water vapor and carbon dioxide release ratio in the mushroom house by measuring relevant climate parameters, and optimally controls the climate in the mushroom house based on the state of these growth and metabolism parameters, so that the climate control parameters in the mushroom house are matched with the growth and metabolism parameters of the mushrooms, and the goal of high-quality, high-yield, and low-consumption mushroom planting is achieved.
Owner:SHANGHAI CANGHU DATA TECH CO LTD

Forest fire early warning system and method based on meteorological and vegetation data analysis

The invention discloses a forest fire danger early warning system and method based on meteorological and vegetation data analysis, and relates to the technical field of fire risk prediction and control. According to the forest fire danger early warning system and method based on meteorological and vegetation data analysis, fine grid division is carried out on a target forest area through a high-resolution DEM and a multispectral or hyperspectral image, and vegetation type identification is carried out on each monitoring subunit; calculating a wet-dry cycle index WDI, a monsoon effect index MFI and a dry thunderstorm risk factor DRF by combining hourly wind speed, wind direction, relative humidity, precipitation and vapor pressure difference meteorological data; through extracting canopy height, canopy density, under-forest shrub and grass layer thickness and high VOC tree species coverage rate, fuel continuity coefficient FCI and volatile matter flammability index VEI are calculated, and accurate quantification of continuity and flammability of vertical ladder fuel and horizontal canopy is realized. And a comprehensive fire danger index FFI is constructed and subjected to hierarchical management after judgment, so that the dynamism, the hierarchical property and the pertinence of fire danger early warning are realized, and the forest fire danger prevention and control precision and the patrol resource utilization efficiency are improved.
Owner:SOUTHWEST FORESTRY UNIVERSITY

Shale carbon dioxide adsorption expansion damage experiment method considering hydration state

PendingCN121933340APrecisely controllable hydration statusSolve unquantifiable problemsMaterial analysis using wave/particle radiationMaterial strength using tensile/compressive forcesPorosityClay minerals
The invention belongs to the field of carbon dioxide geological sequestration and oil-gas field development, and relates to a shale carbon dioxide adsorption expansion damage experiment method considering a hydration state, which comprises the following steps: processing a shale sample according to requirements; the shale is subjected to constant-humidity regulation and control pretreatment, and in the process, different relative humidity environments can be used for pretreatment, so that the influence of different clay mineral hydration interlayer spacing states on adsorption expansion is obtained; soaking the pretreated shale in supercritical carbon dioxide, adsorbing the sample when the temperature and pressure conditions reach a set value, soaking until the rock sample reaches adsorption saturation, and treating by using carbon dioxide with different pressures and temperature gradients; according to collection of sample microstructure and mechanical data, damage can be treated through crack initiation position comparison, porosity and gray scale quantitative analysis and macro-mechanical parameter evolution. The method provides an experimental method for carbon dioxide geological sequestration safety assessment and shale gas fracturing parameter optimization.
Owner:LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY

Method and system for inverting degree-day factors based on snow water equivalent difference and used for snow melting forecast

The invention provides a method and system for inverting a degree-day factor based on a snow water equivalent difference value and used for snow melting forecasting, and relates to the technical field of hydrological remote sensing. The method comprises the following steps: firstly, acquiring and unifying multi-source snow water equivalent data and meteorological elements such as air temperature, radiation, wind speed and relative humidity to form a standardized input data set, generating assimilated snow water equivalent by adopting data assimilation fusion, and calculating uncertainty; judging a snow melting process by combining meteorological conditions and uncertainty, calculating a pixel scale daily factor when snow melting is judged, and constructing a space-time database; spatial and temporal features are extracted by using a convolutional neural network and a long short-term memory network, historical sample degree-day factor distribution is obtained based on similarity matching for prediction, the snow melting amount is calculated, and the uncertainty is estimated, so that the snow melting simulation and prediction precision is improved.
Owner:CHINA HYDROELECTRIC ENGINEERING CONSULTING GROUP CHENGDU RESEARCH HYDROELECTRIC INVESTIGATION DESIGN AND INSTITUTE +2

Heat pump ring fin difference control method and system based on dew point temperature prediction

The invention provides a heat pump ring fin difference control method and system based on dew-point temperature prediction, and the method comprises the steps: calculating the current dew-point temperature based on the air temperature and the relative humidity, and obtaining a future dew-point temperature sequence through linear weighting prediction based on historical dew-point data; generating a candidate control action set based on the current dew point temperature, the future dew point temperature sequence, the current fin temperature, the current opening degree of the electronic expansion valve, the rotating speed of the fan and the upper limit of the adjustment stride; screening candidate action subsets through an evaluation function; for each candidate action, using a semi-analytical system response simulator to predict a future fin temperature sequence, and calculating a difference sequence between the fin temperature and the dew point temperature based on the future fin temperature sequence; carrying out weighted calculation on a risk score for the difference value sequence of each action, and screening an action set based on a risk score threshold value; and an objective function is constructed, the action with the minimum objective function value is selected as the optimal control action, and the optimal control action is issued to the electronic expansion valve and the fan driver through PWM signals.
Owner:GUANGDONG NEW ENERGY TECH DEV

Salt mist atmosphere concentration control method, device and system

The invention discloses a salt mist atmosphere concentration control method, device and system. The method comprises the following steps: setting a reference parameter corresponding to a target salt mist concentration; generating a salt mist atmosphere and collecting a real-time physical quantity of the salt mist atmosphere; calculating a real-time moisture absorption growth factor of the salt mist atmosphere particles according to the real-time moisture absorption factor, the real-time relative humidity and the real-time particle size distribution; calculating the real-time concentration of the salt mist atmosphere based on a mixed aerosol light scattering model in combination with a real-time extinction coefficient, a real-time scattering phase function and a real-time moisture absorption growth factor; and in response to deviation of the real-time concentration from the target salt mist concentration, generating and executing a regulation and control instruction based on a multi-physical-quantity coupling regulation and control model to regulate the generation rate and the humidity compensation amount of the salt mist atmosphere until the real-time concentration is stabilized in a preset range of the target salt mist concentration. Through a multi-physical-quantity coupling regulation and control mechanism, the problems of low precision and slow dynamic response in traditional salt mist concentration control are solved, and an accurate salt mist atmosphere control scheme is provided.
Owner:SOUTHWEST TECHNICAL ENGINEERING RESEARCH INSTITUTE OF CHINA SOUTH IND GROUP

Leak detection in transformers

Example methods and systems for leak detection in transformers are disclosed. One example method includes obtaining moisture data of a substance in a power transformer. A functional relationship between relative saturation of moisture of the substance and temperature of the substance is determined based on the moisture data. A gradient of the relative saturation with respect to the temperature of the substance is determined based on the functional relationship. It is determined, based on the gradient, that a leak of moisture of an environment surrounding the power transformer into the power transformer has occurred. In response to determining that the leak has occurred, a visual alert or an audio alert is generated to indicate that the leak has occurred.
Owner:SAUDI ARABIAN OIL CO

Quantitative evaluation method for insulation aging degree of distribution box

The invention discloses a quantitative evaluation method for the insulation aging degree of a distribution box. The method comprises the following steps: acquiring a partial discharge pulse sequence of a distribution box and a synchronous transient environment working condition sequence; mapping the relative humidity which changes in real time into expected environment phase distribution by using a pre-constructed humidity-phase distribution reference model based on a monotonic constraint B spline; performing phase resolution differential operation on the actual observation phase distribution and the expected environment phase distribution, stripping an environment interference component, and extracting aging residual distribution data; and based on the aging residual data, constructing an aging evolution index through cross-period differential or identifying a local condensation risk area through a phase-structure association rule. According to the method, decoupling of a transient environment effect and real insulation aging is realized through a physical inversion thought, false alarms caused by humidity transition are eliminated, environmental circulation fluctuation is inhibited on a long-period scale, and the accuracy and robustness of insulation aging evaluation under complex meteorological conditions are improved.
Owner:SHAANXI ZHONGHAO ELECTRIC GRP CO LTD

Irrigation system based on potato canopy temperature collection and water stress index

The invention discloses an irrigation system based on potato canopy temperature collection and a water stress index, and relates to the field of potato planting, the system comprises a temperature collection module used for collecting the canopy temperature of potatoes in real time; the meteorological data acquisition module is used for acquiring the wind speed, the air temperature and the relative humidity of the target farmland; the central processing module is used for performing compensation processing on the canopy temperature based on the wind speed to obtain a compensated canopy temperature; calculating a water stress index based on the compensation canopy temperature and the air temperature; the decision module is used for generating an irrigation decision signal based on the water stress index and the relative humidity; and the execution module is used for controlling and executing irrigation operation based on the irrigation decision signal. By collecting the temperature of the potato canopy and combining a wind speed compensation mechanism to eliminate environmental interference, the problem that traditional soil humidity detection is lagged is solved, and irrigation response timeliness is remarkably improved.
Owner:SICHUAN ACADEMY OF AGRICULTURAL MACHINERY SCIENCES

Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus

PendingUS20260134883A1Magnetic materials for record carriersAlignment for track following on tapesMagnetic tapeAfm atomic force microscopy
The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. A rate of change in an area ratio of a protrusion having a height of 5 nm or more and 10 nm or less, which is obtained by measuring a measurement region of 5 μm×5 μm on a surface of the magnetic layer before and after 1000 reciprocating slides with respect to an LTO 8 head at a head tilt angle of 15° in an environment of a temperature of 35° C. and a relative humidity of 80%, with an atomic force microscope, is 10.0% or less.
Owner:FUJIFILM CORP

Integrated traffic meteorological monitor

ActiveCN309837315SVisibilityWind run
1. The name of the design product: integrated traffic meteorological monitor. 2. The use of the design product: for measuring visibility, road conditions, road temperature, wet slip coefficient, air temperature, relative humidity, wind speed, wind direction, air pressure, rainfall and other data. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.
Owner:SHANGHAI XUNGUANG ELECTRONICS TECH

A spray-type finned heat exchanger device and a method for predicting and controlling temperature and humidity.

This invention discloses a spray-finned heat exchanger device, belonging to the field of air heat and humidity treatment technology. It includes an air duct, an air supply component, a spray component, a water collection component, a spray circulation component, a finned heat exchanger, a finned heat exchanger water-side circulation component, a sensor component, and a controller. The invention further includes steps for collecting inlet air temperature, inlet air relative humidity, inlet air velocity, and average supply and return water temperatures to obtain the operating status, and then inputting these into an outlet temperature prediction model and an outlet moisture content prediction model to obtain predicted outlet temperature and humidity values. Additionally, it includes a joint control step of collecting inlet air status data, inputting it into a control model to obtain inlet air velocity setpoints and average supply and return water temperature setpoints, and outputting control commands to drive the air supply component and the finned heat exchanger water-side circulation component to operate and cyclically correct. This invention solves the problems of strong temperature and humidity coupling in existing heat and humidity treatment devices, making joint control difficult, and the reliance on experience-based settings leading to insufficient outlet temperature and humidity control accuracy and a lack of quantitative prediction models.
Owner:FUJIAN UNIV OF TECH