203 results about "Water level fluctuation" patented technology

The invention provides a control method and a control system, which can continuously detect temperature change in liquid heating equipment and calculate out temperature increasing rate. The temperature increasing rate is used for comparing with a set threshold value to judge whether parching happens. In order to avoid mistaken errors caused by factors of water level fluctuation and the like, the control method and the control system can collect data continuously for three times to judge whether parching happens. Simultaneously, light-emitting diode display lamps are utilized to give fault alarm to users to remind users of examining a water heater and a pipeline. The control method and the control system can judge whether parching happens according to speed of temperature rise in the liquid heating equipment to protect electrical heating, prolong service life of equipment, provide safety guarantee for using the liquid heating equipment and prevent safety accidents from happening.

An elevator submerged plant growing bed, a production method thereof and an application method thereof belong to the technical field of ecological environment engineering. By adopting the device, the recovery of submerged vegetation can be carried out in a water area with low-transparence water bodies, big water-level fluctuation and nearly no submerged plant. The device consists of five parts, namely, a bed body, a buoyancy regulation and control system, a fixing system, a depth regulating system, plants and growth matrixes thereof, wherein, the bed body consists of a bamboo joint and a steel frame which are fixed; the buoyancy control comprises a floating ball combination and a buoyancy bamboo joint combination; the fixing system is a pythmic fixing member and a connecting line between the pythmic fixing member and the bed body; the depth regulating system comprises a floating ball adjusting rope and a measuring device; and the plants and the growth matrixes comprise submerged plants, mud placing bamboo joints and bottom mud for plant growth. The device designed in the invention can provide a carrier for the water bodies in which the recovery of the submerged vegetation is hard to carry out under the existing natural conditions, which is favorable for the recovery of the submerged vegetation.

The invention discloses a river water level monitoring method based on monocular camera, which is an information processing method belonging to the video monitoring field, that is using light reflection characteristic difference between the river plane surface and the bank plane surface to determine water level height with horizontal pixel projection algorithm (HPIP) for video collected images. The method includes the steps: (1) using affine transformation for executing geometric correction to image; (2) executing histogram equalization process for video image greyscale; (3) determining water level height with horizontal pixel projection algorithm; (4) real time and robust tracking water-level fluctuation. The invention has the advantages of easy realization, strong robustness, high reliability, high real time property or the like, and can provide real time dependable information for hydrology monitoring.

The invention relates to a large-scale open channel water level automatic control method based on storage capacity dynamic regulation. The method comprises the steps of determining a feed-forward flow regulating value; determining whether the feed-forward flow regulating value needs to be subjected to feedback correction or not; calculating a feedback correction value of a feed-forward control flow; calculating a flow regulation target value; calculating the actual opening of a gate; adjusting the opening of the gate. The method disclosed by the invention adopts a feed-forward flow control mode and fully considers the influences of division flow and water level dead areas for controlling a water surface profile of the whole channel section, so that water level fluctuation at local points can be flattened and filtered out, the sensitivity to movement dead areas of the gate is reduced, and accordingly frequent operation for the gate is reduced. Storage capacity compensation conditions required by stable water delivery are conveniently realized, so that the phenomenon of water level overswing is effectively reduced, and stability can be more quickly realized. The control principle is simple and clear and easy to realize and grasp, the influences of various disturbance factors can be effectively avoided, the operation and management cost of an open channel is reduced, the water delivery safety is ensured, and the water delivery efficiency is improved.

The invention discloses an amphibious floating island suitable for a riparian zone. The amphibious floating island comprises floating bed units and fixing devices, wherein the fixing devices are fixedly arranged along the embankment direction, a plurality of floating bed units are longitudinally and horizontally arranged along the bank, and adjacent floating bed units are in flexible connection with each other through a rope lock. The invention also discloses a construction method of a revetment applying the amphibious floating island. The construction method mainly comprises the steps of fixing the floating island at the highest water line in the riparian zone of a reservoir, and arranging emergent aquatic plants which accord with the regional characteristics of the Three Gorges reservoir region on the floating island. The floating island is simple in structure and flexible in application, and can produce a corresponding 'bending' phenomenon in the process of matching with the increase amount of water level. The emergent aquatic plants on the floating island can satisfy the requirement on improvement of the ecological environment of a water body, and afforest the bare riparian zone when the water level falls without secondary pollution, so that the amphibious floating island has an eco-friendly effect, and is especially suitable for littoral zones with great water level fluctuation.

The invention discloses a calcareous sand dynamic-static load multi-functional pile foundation model test device and relates to a model test technology for pile foundation engineering. The structure of the device is as follows: a hydraulic lifting unit is arranged at the bottom of the whole bracket, a model box is arranged on the hydraulic lifting unit, the model box is filled with calcareous sand, and a model pile is arranged in the calcareous sand; a water level fluctuation system is connected with the model box; the fixed ends of a vertical load applying part, a horizontal load applying part, a hydraulic loading part and a pneumatic loading part are separately arranged on the whole bracket, and the movable ends of the vertical load applying part, the horizontal load applying part, the hydraulic loading part and the pneumatic loading part are separately connected with the model pile; and an induction acquisition system is separately connected with the model pile and the model box. The device can apply various types of load on the model pile and particularly can simulate applying various complicated loads in a marine dynamic environment and obtain parameters related to the pile and earth interaction process of the model pile under complicated load action.

The invention discloses a circular demountable ecological floating bed suitable for a water area with water-level fluctuation, which comprises a floating bed fixed rod, an aluminum sheet frame, a plurality of hollow PVC plastic pipes, a foam filler, conveniently-demountable standardized plant baskets and a metal ring. The circular demountable ecological floating bed is characterized in that one end of each hollow PVC plastic pipe is fixedly connected with the outer wall of the metal ring, while the other end is fixedly connected with the inner wall of the aluminum sheet frame, and included angles between two adjacent hollow PVC plastic pipes are the same; the foam filler is arranged between the metal ring and the aluminum sheet frame; a plurality of empty holes for storing the standardized plant baskets are arranged on the foam filler regularly; and the metal ring is movably sleeved outside the floating bed fixed rod. In the ecological floating bed, the water quality of the river water area with water-level fluctuation can be processed, and the planted plants can be replaced conveniently, so the ecological floating bed constructs a certain landscape effect while purifying the water quality biologically without influencing shipping, and also has a certain economic benefit.

The invention provides a three-dimensional layered water quality monitoring method and a three-dimensional layered water quality monitoring system. The method comprises the following steps of collecting water quality information of each measurement point, calculating mean square deviation of water quality parameters of each measurement point in real time, and collecting positions underwater according to the mean square deviation value; automatically controlling the underwater collection speed according to the water-level fluctuation speed; and collecting water quality information at different underwater depths according to the mean square deviation of water quality information, measurement points with water-level fluctuation selective adaptability and underwater speed, and establishing water body information in a layered manner. The system comprises a lifting execution device, an underwater collection device arranged on the lifting execution device, and an overwater control device respectively connected with the lifting execution device and the underwater collection device. The method and the system are capable of automatically and accurately monitoring ocean water quality or surface water quality, intelligently controlling the collection depth, speed and interval, accurately, effectively and automatically dividing each water layer along the direction, and providing accurate and reliable data guarantee for water quality research.

The invention discloses a method for collecting underwater bubbles and a method for monitoring underwater bubble flux under hydrodynamic conditions. A counterweight pendant is connected with the open part of an inverted funnel of a collection device through a rope; a tubular connector is arranged at the top of the inverted funnel, and is connected with a gas inlet pipe of a gas collecting bottle through a gas hose; and a buoy is connected with the outer surface of the inverted funnel through a rope, ant the gas collecting bottle is fixed together with the buoy. The monitoring method comprises the steps of placing a bubble collecting device in a water body, floating the buoy on the water surface and tying on a water surface anchor rope, and fixing one end of the water surface anchor rope on the bank side and the other end of the water surface anchor rope on a channel buoy or a far bank; and collecting gas, and considering an inclination angle theta of the inverted funnel when the bubble release flux is calculated. The methods disclosed by the invention are convenient for operation, have low sampling errors, and are suitable for collecting underwater bubbles and monitoring underwater bubble flux under complex hydrodynamic conditions of natural water bodies (high water level fluctuation or distinct flow rate in water).

A system and method for converting wave energy into electric energy in an intelligent, practical, and efficient manner. The system utilizes a power input shaft coupled with a vertically reciprocating buoy to rotate a crank gear and a ratchet gear meshing therewith. When the gears rotate, a plurality of generators coupled therewith produce electric energy. A flexible pivot device connects the power input shaft and the crank gear for absorbing impacts against the system from irregular and variable passing waves. The power input shaft is adjusted in response to water level fluctuations for maximum efficiency. A counterbalancing and maintenance device is coupled with the buoy to improve energy conversion efficiency and to uplift the buoy to a safe position in extreme conditions. An intelligent control system is included to monitor, control, and optimize the operations of the system.

The invention discloses a submerged bridge pile foundation scouring real-time monitoring system and a monitoring method thereof. A data processing system is arranged at the top of a pier. A fiber bragg grating seepage pressure microsensor is arranged on the surface of the outer wall, located under the water, of the pier. A sunk block is arranged at the position, close to the pile foundation, of a river bed at the bottom of the pile foundation. A monitoring guide beam is fixedly arranged on the sunk block. A limiting device used for preventing the monitoring guide beam from moving in the radial direction is arranged in the middle of the pier. A fiber bragg grating seepage pressure microsensor and a set of fiber bragg grating pressure sensors are arranged at the lower end of the monitoring guide beam. The submerged bridge pile foundation scouring real-time monitoring system and the monitoring method thereof have the beneficial effects that the monitoring system and method are suitable for monitoring pile side pressure changes caused by scouring and water pressure changes caused by water level fluctuation near the underground pile foundation in real time, thus, the influences of pile side flow scouring and water level on pile foundation safety are obtained through analyzing, and the monitoring system and method have the advantages of high durability and precision, simple structure, real-time monitoring and easy engineering layout.

The invention is a process for the development and use of a model for the prediction of shallow ground water level fluctuation. This approach involves using site specific ground water observations for the determination of rate of decline due to infiltration and rate of rise due to precipitation for the ground water level at a site, followed by use of those rates with historic precipitation records to estimate the extent of historic saturation and inundation periods at the site. That information may then be used for the delineation of jurisdictional wetlands and other similar applications. The steps of the process are as follows: 1. Short-term on-site observations of ground water level and rainfall 2. Statistical analysis to determine rainfall response and infiltration rates to develop site model 3. Prediction of past ground water levels using historic rainfall records for the region 4. Estimation of percentage of years meeting wetland regulation criteria

The invention discloses an indoor circulating culture system for aquaculture. The indoor circulating culture system comprises an upper layer culture tank, a middle layer culture tank and a lower layer culture tank, wherein each culture tank is divided into a culture zone and a back filtering zone which are communicated mutually through a first tempered glass plate and a second tempered glass plate in the culture tank; a water pump with a water-level controller is arranged in the back filtering zone of the lower layer culture tank and used for pumping water to the upper layer culture tank; siphon water pipes are respectively arranged in the back filtering zones of the upper layer culture tank and the middle layer culture tank, and are respectively used for sucking the water in the upper layer culture tank into the middle layer culture tank, and for sucking the water in the middle layer culture tank into the lower layer culture tank through syphonage; the water pump is started or stopped according to the water-level controller, so that the tide-type water-level fluctuation is realized. Wastes generated during culturing are removed by filtering devices and protein separation devices, so that the water is guaranteed to be clean and stably circulate, and the wastes generated during culturing can be thoroughly and efficiently removed; the working time of the water pump is shortened by the water-level controller, so that energy sources are saved, the culturing cost is reduced, and the influence of noise on culture organisms is reduced.

The invention relates to a method used for measuring the vertical saturation permeability coefficient of soil, belonging to the hydrologic survey field. In the method, the devices such as a single ring, a self recording level meter and a soil moisture content tester are adopted for measurement; then, according to the observed water-level fluctuation process of the single ring, by adopting the soil water motion computing method of Philip and Nestingen, a computational formula of the water-depth variation for describing the single-ring falling head permeability test is elicited, and the vertical saturation permeability coefficient of the soil can be calculated by adopting the principle of least square. The method can be used for measuring the vertical saturation permeability coefficient of the soil outdoors quickly and accurately. The instruments need little water, the devices are simple, the outdoor carrying is convenient, and the radius of the permeated single ring is not limited when in measurement, therefore, the method can be used for measuring the permeability coefficient of the soil at large scale. In addition, the method can be used for measuring the vertical saturation permeability coefficient of the soil in the water conservancy industry, the hydrogeology industry and the irrigation and water conservancy industry and is easy to be promoted and used.

The invention discloses a non-forecast flood regulation method for a cascade hydropower station based on water level flow. The method comprises the following steps of: 1, measuring an initial water level of a reservoir with a floodometer and determining the capacity of a reservoir to be accumulated according to a preset flood control high water level; 2, calculating the current reservoir flow, and calculating the residual flood volume according to a peak and amount relationship; and 3, maintaining the water storage working conditions when the residual flood volume is smaller than the capacity of the reservoir to be accumulated, controlling the flow through a water level fluctuation method when the residual flood volume is greater than the capacity of the reservoir to be accumulated, and accumulating the reservoir flow to a preset high water level. In the regulation process, the actually measured flood storage flow is the current flood peak flow, if the residual flood volume is smaller than the capacity of the reservoir to be accumulated, the water storage working conditions are maintained, and at the moment, the highest reservoir level can be ensured to be lower than the preset high water level; and when the residual flood volume is greater than the capacity of the reservoir to be accumulated, the flood is controlled through the water level fluctuation method, and the reservoir flow is accumulated to the preset high water level.

The invention discloses a shore/beach sediment release simulation experiment device and a shore/beach sediment simulation experiment method. The shore/beach sediment release simulation experiment device comprises a wave generating device, a measuring device and a water level fluctuating device, wherein the water level fluctuating device comprises a slope variable water channel the slope of which can be regulated, and a lifting barrel which is connected with the slope variable water channel by virtue of a water outlet pipe and can be lifted in height; the wave generating device is arranged in the slope variable water channel, and comprises a rotating disc sliding groove formed vertical to the bottom of the slope variable water channel, a rotating disc which is arranged on the rotating disc sliding groove in a sliding manner and can rotate, and a floating body connected with the rotating disc. A mud groove is formed in the slope variable water channel. Water is injected in the lifting barrel and the water level fluctuation time and the fluctuation period in the slope variable water channel and the water level fluctuation are controlled, the rotating disc is rotated to continuously generate wave, so that the bottom permeability of bottom mud in a natural state and the fluctuation characteristic close to the natural water level can be restored, and the problem of experiment research of bottom mud pollution release under a hydrodynamic action that a lake shore is periodically flooded and repeatedly scoured by water can be simulated.

The invention relates to ecological water supplement technology for lakes based on multi-scale wavelet transform, which is characterized by not only well extracting the information of the water level on different scales by applying the excellent performance of multi-resolution analysis of wavelet transform but also reconstructing the wavelet coefficients of main scales and combining other hydrological and ecological data to obtain the division standards of hydrological stages, determining the suitable hydrological stage containing the wet and dry seasons and putting forward a scheme of ecological water supplement for lakes, which simultaneously takes both the minimum ecological water level and the in-year water level fluctuation characteristic into account. Compared with the prior art, the invention is characterized by more deeply discussing the multi-scale characteristic of hydrology, being closer to the natural hydrological conditions of lakes than the single minimum ecological water level of traditional water supplement and providing bases for analyzing the state of the hydrological environment of degraded wetlands, formulating water supplement schemes suitable for specific regions and improving efficiency of water supplement for lakes.

The invention provides a method of detecting impact of rise and fall of underground water level on soil percolation and water and salt migration. The method comprises steps of loading soil sample andsimulating, detecting and analyzing underground water level fluctuation. Through adoption of the method of detecting impact of rise and fall of underground water level on soil percolation and water and salt migration, rise and fall of the underground water level caused by water storage and discharge of a reservoir and underground water extraction and recharge can be simulated in a laboratory, andsoil moisture potential, moisture rate, temperature and salt content of soil at different heights can be measured. The method is easy to conduct and implement, and is highly reliable.

The invention discloses a water level control system for a deoxygenated water tank. The system comprises a water level detection unit for detecting a water level height in the deoxygenated water tank in real time, a water supply control valve and a water pump which are arranged on a water supply pipeline, a controller and a parameter input device, and also comprises a water supplementing device, wherein the water supplementing device comprises a water supplementing tank which automatically supplements water into the deoxygenated water tank under the action of gravity, a water supplementing pipeline connected between the water supplementing tank and the deoxygenated water tank, a water supplementing control valve arranged on the water supplementing pipeline, a water injection pipe for injecting water into the water supplementing tank under the driving action of the water pump, and a water injection control valve arranged on the water injection pipe; and the water supplementing tank is obliquely arranged above the deoxygenated water tank. The water level control system has the advantages of reasonable design, high intelligent degree and good using effect, is convenient to mount and easy to operate, and can overcome the defects that the controller frequently controls the water pump to start or stop, the power consumption is high, normal performance characteristics of the water pump and a deoxygenator are influenced, and the like in the existing water level control system for the deoxygenated water tank due to water level fluctuation in the deoxygenated water tank.

The invention relates to a self-chambering self-discharging container ship. The container transport cannot be developed in the widely distributed smaller inland rivers in China and other countries of the world because the container terminal needs more investment, the riverboat is small, the traffic volume is small and the investment cannot be withdrawn. Meanwhile, much more obstructing buildings such as bridges are spanned across the smaller inland rivers and the water level fluctuation in the flood period and the dry season is bigger, the ship is difficult to adapt to the inland river and the ship design and the transportation are difficult to perform, so a large amount of water transport resources are in idle while the transportation by land is increasingly worsen. The inland river container transport which is energy saving, environment-friendly and low-cost is needed to be developed as soon as possible. The self-chambering self-discharging container ship can solve the problems and is a powerful tool for developing the container transport resources in smaller inland rivers.

The invention discloses a loadable permeability test device. The loadable permeability test device comprises a permeability instrument, a sensor acquiring module, a vertical load loading module, a water level fluctuation module, a dry and wet circulating module and a sample deformation monitoring module, wherein the sensor acquiring module is used for acquiring permeability parameters of a sample; the vertical load loading module is arranged on the top of the permeability instrument and is used for providing vertical load for the sample; the water level fluctuation module is connected to one side of the permeability instrument and is used for simulating tide load; the dry and wet circulating module is connected to the bottom of the permeability instrument and is used for simulating rainfall and evaporation; and the sample deformation monitoring module is arranged on a side of the permeability instrument, and is used for observing and recording deformation of the sample in an experimentation process.

The invention relates to a reservoir bank hydro-fluctuation belt terraced tree planting method.The technical purpose that terraced, appropriate land and appropriate tree ecological environment repair is carried out in the area where surrounding submersed land is periodically changed due to seasonal water level fluctuation of a reservoir bank hydro-fluctuation belt is achieved.The method is characterized by comprising the steps that different terraced distinguishing is carried out on the reservoir bank hydro-fluctuation belt with the water level fluctuation, and plants are distributed based on biological characteristics of water resistance and dry resistance of plants, forest planting controllability, plant allelopathy, arbor-shrub-grass combining degree and arbor-shrub-grass soil conservation, washout prevention and slope protection ability in different growth spaces; life vitality of tree species is kept, a stable plant community is formed as soon as possible, the good protective effect is achieved on stabilizing tree species and avoiding external force impact, greening, slope protection and soil fixation are achieved, and the certain landscape effect is achieved.

The invention provides an underground water-sealing cave depot system provided with a pressure adjusting gas chamber, and an oil storage method of an underground water-sealing cave depot. The pressureadjusting gas chamber arranged above an oil storage cave chamber is utilized for meeting a gas phase space requirement brought by a stored oil filling volume and an oil product medium physical change; and meanwhile, through controlling the gas pressure in the pressure adjusting gas chamber, a pressure difference between the oil product pressure in the oil storage cave chamber and the undergroundwater pressure outside the cave chamber can be balanced and adjusted, so that an effect on reducing the underground water inflow volume in the cave chamber is achieved. According to the technical scheme provided by the invention, the problems of oil gas leakage and large water seepage quantity easily caused by a gas phase space left in the cave chamber through a water level fixing method are solved, meanwhile, the water supply water seal pressure of a water curtain system is indirectly reduced, the problems of frequent equipment startup, complicated process control and high operation cost caused by a frequent water level change of a water level fluctuation method are further solved, and the underground water-sealing cave depot system and the oil storage method of the underground water-sealing cave depot have positive significances on construction and development of the underground water-sealing cave depot in China so as to have a broad application prospect.

The invention discloses a riverbed vertical undercurrent switching testing device under driving of pulsating pressure and a production method thereof. The riverbed vertical undercurrent switching testing device is characterized in that an earth surface water level is in periodic sinusoidal fluctuation, and pulsating pressure of a riverbed interface is caused; by using an automatic elevating water level control system, a water level simple harmonic vibration control chamber, and a riverbed water trough model, periodic fluctuation of a riverbed earth surface water level similar to a trigonometric function is generated, and the pulsating pressure generated by the water level fluctuation is used to drive an undercurrent switching function in the vertical direction of the riverbed. The riverbed vertical undercurrent switching testing device is advantageous in that the function of the pulsating pressure generated by the water level fluctuation used as a unique driving force of a riverbed undercurrent switching test is realized, and the riverbed vertical undercurrent switching testing device is used to break through limitations of conventional water trough tests only adopting methods of changing of riverbed topography and earth surface water flow velocity. The technological verification of the device is feasible, and an integrated structure has strong coordination performance, and model production and test operation are convenient.

The present invention provides a system and method for converting wave energy into electric energy in an intelligent, practical, and efficient manner. The system utilizes a power input shaft coupled with a vertically reciprocating buoy to rotate a crank gear and a ratchet gear meshing therewith. An intelligent control system is included to monitor, control, and optimize the operations of the system. The length of the power input shaft is adjusted in response to water level fluctuations so that the rotational motion of the crank gear is intelligently controlled within a predetermined desirable region for maximum efficiency.

The invention discloses a permeability evaluation method of a permeable asphalt pavement based on fluid-solid coupling analysis. The method comprises the steps of determining material parameters and hydrologic parameters of structural layers of the pavement through a laboratory test, establishing unsaturated seepage models of the structural layers, establishing a numerical model of a permeable asphalt pavement system, simulating an initial moisture field in the pavement system, analyzing a rainfall infiltration process based on a saturated-unsaturated fluid-solid coupling theory, simulating adynamic variation of the moisture field under a rainfall condition, and evaluating permeability of the permeable asphalt pavement. The method comprehensively considers the influence of the initial moisture field caused by underground water and subgrade soil types in a pavement scope on the internal permeability of the pavement, and relatively accurately simulates mutual coupling and influence of the rainfall infiltration process and an underground water level fluctuation; the laboratory test and numerical simulation are combined to achieve transient analysis of the internal rainfall infiltration process of the permeable asphalt pavement system; and the method can more visually evaluate the permeability of a road structure and is practical, feasible and efficient.