1301 results about "Water demand" patented technology

Methods and devices are provided to automatically determine plant water requirements and adjust irrigation in order to make efficient use of water. In one implementation, an irrigation control unit comprises a memory storing historical values of a plurality of variables used at least in part in calculating plant water requirements, and at least one input adapted to receive signals corresponding to current values of one or more of the plurality of variables. The unit also comprises a processor coupled to the at least one input and the memory, the processor adapted to determine the plant water requirements at least in part using, for each of the plurality of variables, a current value in the event the current value is available and at least in part using, for each of the plurality of variables, a stored historical value in the event the current value is not available.

The invention discloses a fuzzy-control-based internet of things intelligent irrigation and fertilization control method and system. The method comprises the first step of data collection and processing, wherein limiting values of the soil humidity, nutrients and pond water level and the irrigation and fertilization planning time are set and stored in a database according to the water demand regulation and a fertilization formula of crops, and collected soil temperature and humidity, soil nutrients, air temperature and humidity, air speed, rainfall, flow, pond water level and pipe network pressure data; the second step of intelligent control, wherein corresponding data are read from the database and an irrigation valve and a fertilization valve are intelligently controlled by the adoption of the fuzzy control algorithm and a water and fertilizer coupling mode, by comparing the current pond water level with the set limiting value of the pond water level, starting and stopping of a water pump are intelligently controlled, and the speed of the water pump is adjusted and controlled by a PID algorithm. The fuzzy-control-based internet of things intelligent irrigation and fertilization control method and system have the advantages of being good in performance, complete in function, high in expansibility, easy to operate and manage and the like, and intelligent management and control are achieved by the adoption of fuzzy control.

The invention discloses a remote wireless farmland monitoring system and method. The remote wireless farmland monitoring system comprises a farmland information acquisition subsystem, an irrigation control subsystem, a wireless remote transmission unit, and a cloud computing server, wherein the farmland information acquisition subsystem comprises multiple sensor nodes for acquiring growth information data of farmland crops; the irrigation control subsystem receives irrigation and fertilization commands from the cloud computing server to perform precise fertilization and irrigation; and the cloud computing server performs crop growth simulation day by day in the whole growing period of the crops, computes daily water demand information and growth nutrition information, and sends irrigation and fertilization commands to the irrigation control subsystem in real time. By virtue of the remote wireless farmland monitoring system and method disclosed by the invention, the effect of optimizing and guiding the irrigation and fertilization during crop plantation by farmers is achieved, and more precise irrigation and fertilization control can also be provided so as to achieve the aims of saving water and fertilizer and improving earnings.

Methods and devices are provided to automatically determine plant water requirements and adjust irrigation in order to make efficient use of water. In one implementation, an irrigation control unit comprises at least one input adapted to be coupled to and receive signals from a rainfall sensor and a temperature sensor, the signals corresponding to current values of an amount of rainfall and temperature. The unit also includes a memory storing historical values of a plurality of variables and a processor coupled to the at least one input and the memory. The processor is adapted to determine plant water requirements at least in part using the historical values of the plurality of variables and the current values of the temperature and the amount of rainfall.

The invention discloses cement concrete, which has the advantages of fine particle, good fluidity, low hydration heat, low shrink, small water demand, high early strength and the like. Moreover, the alkalinity is low and the alkali-aggregate reaction of the cement concrete is inhibited; the compactness is high and the durability of the concrete is increased; the concrete interface surface and the gaps of gelled materials can be fully filled, the interface structure of the concrete is improved, the compressive property , the tensile property and the like are improved, the early cracks of the pumped concrete are effectively reduced, the later-stage desiccation is compensated, the crack resistance is improved, and the construction cost and the maintenance expense are reduced, i.e. the production cost is reduced; and the insolation resistance is high, the cement concrete is not apt to conduct heat, the external structure can be changed easily, the mechanism strength is good, the heat resistance, the compression resistance, the impact resistance and the humidity resistance are high, no condensation is caused because of cold and hot alternation, and the cement concrete can adopt to all kinds of climatic conditions.

The invention discloses a water management informatization structure system of an irrigation district, which comprises irrigation district identification, information monitoring, information transmission, building control and a scheduling decision module. The irrigation district identification is used for identifying an irrigation district canal system, buildings, management mechanisms and water users; the information monitoring is used for acquiring and outputting irrigation district information; the information transmission is used for transmitting the information to the scheduling decision module in time and transmits water demand information to the building control through the scheduling decision module; the building control is used for dynamically scheduling gates and pumping stations of the irrigation district; and the scheduling decision module is used for providing a decision basis and a decision plan for an irrigation district administrator and controlling the water consumption of the irrigation district. According to the actual condition of the water management informatization of the irrigation district, the invention constructs the water management informatization structure system of the irrigation district, which conforms to reality by a method of the attribute classification of information technology. The water management informatization structure system of the irrigation district has the advantages of no repetition and intersection, easy understanding and prominent water management informatization of the irrigation district.

Various mist-type fire protection systems for the protection of light and ordinary hazard occupancies of reduced water demand as compared to known mist type systems or sprinkler systems configured to protect the same occupancies. Three system configurations are defined by varying design criteria for the installation of: mist devices having an enlarged coverage area alone or in combination with known nozzles or sprinklers. The preferred mist devices provide for the protection of at least one of a light hazard occupancy only and a light and ordinary hazard occupancy having a ceiling with a maximum ceiling height of at least 8 ft. The preferred device include a body having a passageway defining a K-factor of less than 1 gpm/psi^1/2. The preferred device includes means for diffusing the fluid at a flux density of less than 0.1 gpm/sq. ft. for a fluid pressure at the inlet of less than 500 psi. to define a coverage area of the device of over than 132 sq. ft., preferably to a maximum of 256 sq. ft.

The present invention discloses a multi-year regulating storage reservoir optimal scheduling method considering runoff uncertainty. The method comprises the following steps of: (1) analyzing historical reservoir runoff data; (2) establishing a runoff random simulation model, and generating a reservoir simulation annual runoff sequence; (3) simulating annual inflow runoff sequence classification and performing intra-annual distribution to obtain a three-year inflow runoff process sequence on a month scale; (4) establishing a multi-year regulating storage reservoir optimal scheduling model that considers multiple water demands; and (5) reducing dimension by using an optimization algorithm and optimizing a resolution model so as to obtain an optimal discharging and water supply decision. According to the method provided by the present invention, the scheduling with maximized comprehensive benefits of long-term multi-target operation can be performed on a multi-year regulating storage reservoir by considering runoff uncertainty, so that the method is suitable for promotion in long-term optimal scheduling of the multi-year regulating storage reservoir in China.

The invention relates to a method for cooperatively and optimally allocating the water volume in a non-flood season, which comprises the following steps of: firstly, obtaining the information of water consumption and water return of each aspect under the overall consideration including the aspects of ecology, livelihood, industry, agriculture, and the like of a river basin; secondly, determining and controlling the minimum water demand of a section by calculating the runoff of a river course, the water demand outside the river course and the lowest water demand in the river course; monitoring the water volume of the river course of the river basin at real time, and automatically outputting water shortage prewarning degrees when the flowrate of the control section is lower than the minimum water demand flowrate; and finally, dynamically and integrally adjusting and controlling groups of reservoirs through cooperative particle swarm intelligent optimization algorithms under different prewarning degrees, so as to achieve the functions of unified water allocation. The method thoroughly takes the water consumption of the ecology, the livelihood, the industry and the agriculture into consideration, and ensures the balanced water consumption of water-consuming aspects in the river basin according to the principle of firstly ensuring the livelihood and then meeting the requirements of the agriculture and the industry.

The invention relates to an intelligent irrigation fertilization decision-making control system, comprising an input unit, an output unit, a data acquisition unit and an irrigation control unit, wherein, a decision-making analysis unit arranged in a decision control database receives the data from the input unit and exchanges data with a privilege unit after processing the received data, and then exchanges data with a fuzzy reasoning unit which also receives output data of a data management unit; after performing logical judgment and processing according to the received data, the fuzzy reasoning unit outputs the data to a control management unit; a sensor of the data acquisition unit acquires and transfers the soil humidity data to the data management unit; a controller of the irrigation control unit receives the data from the control management unit, and transfers the data to a switching quantity output module after processing, and the switching quantity output module transfers the data to a solenoid valve. The intelligent irrigation fertilization decision-making control system has the advantages that: crop physiological water demand indicators are introduced into the computer automatic control field, the irrigation fertilization decision-making is carried out through an irrigation indicator database and the fuzzy classification technology.

The invention provides a system for carrying out collection, purification and utilization on rainwater on road surfaces, and the system comprises a groove and one or more packing units arranged in the groove, wherein the two sides of each packing unit are respectively provided with a baffle, a ventilation well is formed between two baffles arranged at the head end and tail end of two adjacent packing units, and a ventilation well is formed among the baffles at the two ends of the groove and the inner side wall of the groove; the bottom surface of each packing unit is provided with a concrete grating, a water collecting sump is formed between the concrete grating and the internal bottom surface of the groove, and the water collecting sump is mutually communicated with all the ventilation wells; and the packing unit on the concrete grating is composed of a cobble layer, a gravel layer, a matrix layer and a planting soil layer which are sequentially arranged from bottom to top, and plants are planted in the planting soil layer. Rainwater which is purified by the system disclosed by the invention can satisfy the needs of agricultural water and general landscape water.

Disclosed is a drinking water reminding system and the reminding method thereof. The water intake of user is measured by the operation of a reminder of the drinking water reminding system, and a collector of the drinking water reminding system is provided for adjusting the daily drinking water demand of user according to environmental parameters or the physiological parameters of user. The drinking water reminding system reminds the user to drink water if the drinking water reminding system determines that the user has taken insufficient water according to predetermined conditions and measurement results, drinking water reminding system.

A method of cultivating crops and cover-crops, interactively and sustainably, using a novel hot water apparatus. The apparatus enables the farmer to prepare a soil bed for planting with a no-till method that: controls nematodes and soil pathogens, promotes nutrient cycling of cover crops and organic materials, kills weeds and weed seeds, and cultivates healthy soil micro flora. A low-pressure (5-60 psi) hot water (120-209 F) delivery system, characterized by a flexible mat which evenly distributes water to the underside of the mat where an attached layer of material with a high water holding capacity saturates and conducts scalding water onto the weeds. A hot water recirculation and heat exchange system reduces water demands while maintaining a high thermo charge in the mat. After soil cools, plants or seeds are planted directly through the mulch of dead weeds or cover crop. Inoculation of soil of microbes promote soil health and crop production.

The invention discloses a water outlet temperature control method of a water heater, the control method comprises the following steps: the water heater receives user body temperature information collected by a wearable device; the water heater collects the indoor temperature information of a bathroom; and the water heater controls the water outlet temperature of the water heater according to the user body temperature information and the indoor temperature information. The control method disclosed by the invention can meet the water using requirement of a user and is more convenient. The invention also discloses a water heater system.

The invention relates to a multi-data based crop water demand detection system, comprising a data detection unit, a wireless transmission unit, a data fusion processing unit and a decision information publishing unit, wherein the data detection unit is used for detecting and acquiring crop growth information in real time, the wireless transmission unit is used for transmitting the growth information to the data fusion processing unit, the data fusion processing unit is used for fusing and processing different data in the growth information and obtaining decision information on whether the crop demands water or not, and the decision information unit is used for publishing the decision information on whether the crop demands water or not. The invention further discloses a multi-data based crop water demand detection method. The invention can carry out rapid and dynamic monitoring on the crop and make an accurate judgment on the water demand state of the crop.

The invention provides a cooking control method and a cooking device. The cooking control method comprises the steps that the food material weight is detected; a user instruction is obtained; according to the user instruction and the food material weight, corresponding water demand is determined; whether the water adding amount reaches the corresponding water demand, and if yes, a first prompt message is generated, wherein the first prompt message is used for prompting stopping water adding. According to the cooking control method and the cooking device, the first prompt message is generated when the cooking water demand is calculated and the water adding amount reaches the water demand, a user is prompted to add water reasonably, water is prevented from being added too much or too less, and therefore the cooking effect is improved.

The invention relates to the field of water conservancy projects, in particular to a total water consumption control-based newsvendor method for the optimal allocation of water resources. The method comprises the following steps: S1, collecting water supply quantity data and water requirement data according to water distribution transferring conditions and demands for water; S2, determining the objective function and the water distributing coefficient through combining with the data collected in the step S1 and taking the comprehensive benefit of the economy, the society and the ecological environment as the maximum goal; S3, forming constraint conditions of the optimal allocation of the water resources according to data conditions in a water resource simulating system; and S4, solving a total water consumption-controlled newsvendor model for the optimal allocation of the water resources. The method disclosed by the invention has the advantages of closely integrating a current social proposition of controlling the total water consumption with dynamic change information of water market price, reflecting the influence of different total water consumption controlling index schemes onthe net income of water users, effectively coordinating relationships among drainage basin water, water demand and total water consumption control and water distributing indexes and according with water consumption characteristics of southern areas with high water consumption intensity.

The invention relates to a technological method adopting ardealite and desulphurization gypsum for preparing high strength building gypsum. The method includes the following steps: (1) raw materials include the components by mass percent: 0.5 to 2 percent of composite curing agent, 1.5 to 4 parts of composite alkali-activator and ardealite or desulphurization gypsum accounting for the rest amount; (2) after being uniformly mixed, the raw materials of the step (1) are led into a calcining furnace and then are calcinated for 2 to 3 hours at a constant temperature ranging from 150 to 200 DEG C; (3) the calcinated raw materials of the step (2) are naturally cooled, and then are ground to be fine by ball milling after cooling; and (4) the raw materials of the step (3), which are ground to be fine, are aged for 3 to 4 hours, thereby obtaining the product. The invention can effectively avoid secondary environmental pollution, greatly reduces the damage of microelements contained in the ardealite on human bodies and environment, avoids the defects of normal distribution of ardealite particles, heavily high concentration of particle distribution, poor flowability of cementitious materials, high water demand, loose structure, low strength, and the like, and can prepare high strength hemihydrate ardealite powder and desulphurization gypsum powder.

The invention specifically discloses an intelligent agricultural irrigation system and method, in particular relates to the field of agricultural irrigation and aims to solve the problem that irrigation amounts are not appropriate as a conventional agricultural irrigation system does not comprehensively consider water demand factors of crops. According to the technical scheme of the invention, a crop information acquisition module, a field information acquisition module, a soil information acquisition module and a weather information acquisition are adopted to acquire related information of crops, the information is transmitted to a computer of a planter through wireless access nodes, the data information is stored and processed by the computer of the planter, an irrigation control module is controlled to perform irrigation, and meanwhile the data information is uploaded to a server for data sharing through a wireless communication module. By adopting the system, different factors such as growth cycles, weather and soil of plants in different growth periods of crops are acquired, the water amounts of the crops are calculated, the crops are watered appropriately in time, and thus precise watering of the whole system is achieved.

The invention relates to a real-time scheduling method for a reservoir group water supply and transfer system and belongs to the field of reservoir scheduling operation. The scheduling method comprises in-reservoir runoff forecasting and water demand forecasting, scheduling method and real-time correction. According to the characteristics of the reservoir group water supply and transfer system, an in-reservoir runoff forecasting method, an optimal scheduling modeling solving method, coupling and nesting modes in different time periods and system real-time scheduling specific flow are designed; and with the water demands of different users being taken into consideration, and under the precondition of guaranteeing water supply safety, water sources are allocated optimally, and maximizing of water supply benefits is realized.

The invention discloses an intelligent gas water heater with a lifting function. The intelligent gas water heater comprises a gas water heater body, a gas proportional valve, a main controller and anoperation display, wherein the gas proportional valve is arranged on a gas supply channel of the gas water heater body, and the main controller is arranged on the gas water heater body. The gas proportional valve and the operation displayer are electrically connected with the main controller, the main controller changes the gas flow opening degree by adjusting the working current of the gas proportional valve so as to control the heat load of the water heater, a temperature setting key is arranged on the operation display, and the main controller automatically sets the maximum opening degree of the gas proportional valve at the preset temperature according to the preset temperature preset by the temperature setting key. The main controller changes the gas flow opening degree by adjusting the working current of the gas proportional valve so as to control the heat load of the water heater, the maximum opening degree of the gas proportional valve is automatically set to be different fromthe preset temperature according to the preset temperature, and the lifting number suitable for users to use can be automatically set according to the preset temperature, so that the water requirements of the users on different occasions can be met.

The invention discloses a diversion project water resource optimal allocation dynamic model establishing system. A system generalization module can abstract and generalize actual problems to form data files which are invoked in a river runoff computing module and a user water demand counting module. A river runoff acquiring module acquires river runoff data files. The user water demand counting module counts user water demand. A model establishing module utilizes an optimization theory to determine a target function and constraints of the model, establishes a mathematical model, and writes model files after the mathematical model is confirmed. A model computing module generates model result files. A model result processing module displays and processes the model results comprehensively. According to the system, a dynamic model can be generated, the optimal model is corrected in real time according to actual rainfall conditions, and model predicting accuracy can be improved.