40 results about "Tidal bore" patented technology

The invention relates to a river tidal bore detection method based on audio feature recognition and aims at overcoming the defects in the prior art that the forecast error is bigger and the real-time capability is unavailable. The invention firstly adopts a microphone arranged above water or a sonar arranged under water to receive the audio signals and then the received audio signals are processed with BPF; then the audio signals of a constant T duration are processed with DFT to obtain the one-dimensional spectrum sequence X(n) and then the audio energy average value of the tidal bore can be figured out; and if the audio energy average value of the tidal bore is more than a preset threshold value A, the existence of tidal bore can be defined and the alarming signal is sent out. The invention adopts the non-contact detection so as to avoid the condition that a sensor is directly arranged under water to cause damage. The real-time automatic detection method can be applied to the detection, forecast and early-alarming for river tidal bore and the accuracy can reach 90 percent.

The invention provides a suspending tide generating station, and the structure thereof consists of a floating cylinder, a waterproof upper cover, a working table, a force-taking device, a storage device and a generator; the working table is arranged on the top of the floating cylinder, the force-taking device is arranged on the upper part of the working table; the storage device and the generator are arranged at the lower part of the working table, wherein, the force-taking device consists of a force-taking wheel, a driving chain wheel, a force-taking ratchet gear wheel, a traction rope, a position anchor box and a traction hammer; the force-taking wheel, the driving chain wheel and the ratchet gear wheel are combined together and are arranged on the working table by a bearing support; the center of the traction rope is wound on the force-taking wheel; two ends of the traction rope are respectively connected with the positioning anchor box and the traction hammer by a steering wheel; the driving chain wheel which is combined with the force-taking wheel is connected with a driven chain wheel of the storage device by chains; the positioning anchor box is sunk on the sea bed; and the traction hammer is suspended in the seawater. The surge generating station can transform the intermittent surge and the tide energy into the electricity energy, thus having good promotion and use value.

The invention discloses a tidal bore monitoring method based on machine vision. The tidal bore monitoring method comprises the following steps: acquiring a water surface video sequence image by utilizing monitoring equipment; performing background elimination processing on the acquired water surface video sequence image to obtain a foreground image; performing foreground ripple noise suppression processing on the foreground image; carrying out tide head line detection on the foreground image subjected to foreground ripple noise suppression processing; and based on the acquired tide head line information, performing measurement and speed estimation on the distance of the tide head line. The method can be used for online monitoring and early warning of the tidal bore, has the advantages of being high in program efficiency, obvious in background interference suppression, prominent in tide head line outline, high in detection precision, high in real-time performance and the like, solves aseries of problems existing in the prior art, and has a better tidal bore monitoring effect.

The invention discloses a method for determining the arrival of tidal bore based on water velocity. The method specifically comprises the following steps of: correctly mounting a radar wave flow velocity meter on the surface of a river; collecting the flow velocity data; determining whether or not to switch the flow velocity data from state 1 to state 2 according to whether the flow velocity increases; determining whether or not to switch the flow velocity data from state 2 to state 3 according to whether the flow velocity decreases; determining whether or not to switch the flow velocity data from state 3 to state 4 according to whether the flow velocity is stable; determining that whether the reason causing the flow velocity change is interference or arrival of the tidal bore according to the difference between the stabilized flow velocity after changing and the flow velocity before changing; and determining the level of the tidal bore according to the magnitude of the difference between the maximal flow velocity in the change process and the flow velocity before changing. The method provided by the invention not only can determine the arrival of a tidal bore, but also can determine the flow velocity of the tidal bore, thereby providing necessary data for forecasting the arrival time of the tidal bore to the next station, and comprehensively realizing real-time automatic tidal bore detection and warning of rivers.

The invention discloses a tide water identification and crisis early warning method based on a YOLO technology, and the method comprises: building a tide water data set through the data enhancement operation of zooming, rotating, translation and symmetry, extracting the atmospheric refractive index through filtering, carrying out the color balance operation of an image, and selecting an atmospheric light component A; carrying out defogging by using a dark channel, carrying out defogging on the image, and carrying out white balance operation on the image, so that a clear image is obtained; andtraining the processed image by adopting a YOLO network to obtain a tide water identification model. According to the model, the input image is recognized, the position and height of tide water and the distance and time from the tide water to equipment are calculated, and early warning can be given out in time when danger occurs. The a tide water identification and crisis early warning method is abeneficial supplement to tide water identification and crisis early warning at present, can automatically monitor the state of tide water, makes up for the defects of manual patrol, reduces the personnel death rate caused by tidal bore, and avoids family tragedies.

The invention discloses a tidal bore flow velocity vertical distribution calculation method. The tidal bore flow velocity vertical distribution calculation method comprises steps that: related data isacquired; the type of the tidal bore can be determined; when the type of the tidal bore is determined as the wave-shaped tidal bore, a formula (4) is used to calculate the vertical distribution of the tidal bore; when the type of the tidal bore is determined as the rotary tidal bore, a formula (8) is used to calculate the vertical distribution of the tidal bore flow velocity. By taking tidal boreactual measurement data and water tank experimental data as basis, the distribution characteristics of the tidal bore flow velocity in the vertical line can be researched in a detailed way, by aimingat the obvious difference between the vertical distribution characteristics of the wave-shaped tidal bore and the rotary tidal bore, the calculation formula of the tidal bore flow velocity distributed along the vertical line can be provided based on a mathematical statistical method. According to the data, the formula is used to reflect distribution characteristics of the tidal bore flow velocityon the vertical line very well, and calculation errors are small. A powerful tool is provided for calculating the tidal bore flow velocity values on different positions on the vertical line can be provided in the engineering design or the tidal bore research.

The invention relates to an optimized flow rate based automatic tidal bore arrival detection method. The flow rate data cannot be screened in the prior art, the data redundancy causes the decline of the sampling and transmission speed, and the accuracy of the automatic tidal bore detection is affected. According to the optimized flow rate based automatic tidal bore arrival detection method, firstly, receiving all the data collected by radar in every minute, sequentially determining whether the flow rate data is invalid, namely, whether a flow rate value is zero, removing invalid data, and storing valid data; secondly, sorting the initially screened data; then removing 20% of large data and 20% of small data from the sorted data, and averaging the valid data in the middle 60% of the data; finally, transmitting the processed data to a telemetry terminal, wherein the data shows the flow rate value of the Qiantang River in this minute. The optimized flow rate based automatic tidal bore arrival detection method can effectively solve the data redundancy of the terminal, and greatly reduces the load of data transmission and the amount of the data storage of a database end, thereby ensuring the smooth of channels and reducing the amount of data processing of telemetry terminal devices.

The invention provides a sea cucumber youngling meshed cage benthic ecosystem temporary aquaculture method. A 'sea cucumber aquaculture meshed cage' is connected to a raft through a connecting rope, two to three protective rings are installed on the meshed cage to form a device body, the device body is sunk to the seabed, and the meshed cage can be closer to the seabed through the protective rings and can be prevented from damage due to direct friction between the meshed cage and the sand of the seabed; the device body performs horizontal reciprocating motions daily with the raft according to the change of tidal bore, the meshed cage is not prone to embed into the sand and mud, the sand and mud is possible to enter the meshed cage, sea cucumber younglings are capable of obtain food in the seabed in large area conveniently, and the sea cucumber youngling meshed cage benthic ecosystem temporary aquaculture is implemented. The method has the advantages that the technology blanks of sea cucumber youngling marine ecosystem aquaculture and sea cucumber benthic ecosystem aquaculture can be filled, the technological problem which people eager to solve and which is failed to solve before is solved, and a complete industry chain of sea cucumber ecological aquaculture is acquired.

The invention provides an excavation face seepage test system of river bottom shield tunnel construction under a tidal load effect. The system comprises a model box and a shield tunnel model. The mainbody of the shield tunnel model is placed in the model box. Soil and water samples are filled in the model box in a layered mode. A movable panel, a telescopic straight rod and a telescopic rod installation seat form a tunnel excavation face support device. A frequency conversion water pump device can be used to simulate a tidal load above a river bottom shield tunnel in a tidal bore zone. Through setting tidal load condition combinations with different amplitudes and different frequencies, excavation face seepage discharge changes, the change of the seepage field of soil near an excavation face, the displacement change of the soil sample at each test point, and the change of the support pressure of each test point are monitored so as to study an excavation face seepage law, then optimizea shield construction parameter and guide a design and construction.

The invention discloses a special component for calculating the tidal bore flow velocity vertical distribution. The special component comprises at least one computer, and a series of hydrological acquisition devices or tidal bore numerical models, wherein the computer is connected with the hydrological acquisition devices or receives a tidal bore calculated value and can calculate the hydrological data acquired by the hydrological acquisition devices or the received tidal level or tide-ahead flow velocity data, and a tidal bore flow velocity vertical distribution calculation model processes the data and outputs an obtained result. The special component can display the vertical distribution of the tidal bore flow velocity at a certain moment in the form of a graph, well reflects the distribution characteristics of the tidal bore flow velocity in the vertical line, has a low calculation error, and can be used as a tool for calculating the tidal bore flow velocity values at various positions in the vertical line in engineering design or tidal bore research.

The invention discloses a tide head reoxygenation capability testing method for a strong tide spreading process. The method is used for analyzing the reoxygenation capability of water in a tidal bore river reach. The method is characterized in that aeration concentration testing equipment, a foundation fixing device, a dissolved oxygen testing device and a testing step are involved, wherein the aeration concentration testing equipment comprises a power supply, sensing parts, a signal amplification and acquisition system, a wireless transmission system, a supporting steel pipe, an equipment box and a bank testing station; the foundation fixing device comprises a steel pipe pile and a threaded cone head; the dissolved oxygen testing device comprises an online dissolved oxygen tester, a probe and a spherical water containing box. According to the method, the principle that whether voltage is output when water and bubbles pass through the sensing parts or not is utilized, so that the testing method for simultaneously measuring the aeration concentration and the reoxygenation capability in the same environment can be provided; the scheme that a single-pile foundation and the support steel pipe are connected in a sleeving way is adopted, so that the arrangement height of a testing point can be flexibly adjusted, convenience and firmness in mounting are ensured, and the method can be adaptive to severe strong tidal bore water flow conditions.

The invention discloses an artificial river channel design method for enhancing tidal bore, and belongs to the field of the river regulation engineering. The method comprises three steps of determining a tidal bore characteristic quantity, determining a geometrical characteristic relation of a tidal bore entrance section and a tidal bore appreciation area section, and determining a shrinking percentage of a river channel along a tide direction. The provided artificial river channel design method for enhancing the tidal bore is used for designing a river channel body form of a tidal reach, andapparently enhancing a tidal bore phenomenon in the river channel. The method is capable of saving design cost, and reducing construction difficulty.

The invention relates to a deflecting flow surface parameter design method for tidal flow reversal of a steep slope seawall. The method comprises the following steps of (1) designing an overall layout of a deflecting flow surface of the seawall; (2) designing a diversion section; (3) designing an arc section; and (4) designing parameters of a deflecting flow section: analyzing and determining the length Lt of the deflecting flow section, a deflecting flow angle theta and the position of a starting point of the deflecting flow section. The parameters of the deflecting flow section can be analyzed and preliminarily selected by applying a simplified formula firstly and then are determined by applying SPH numerical simulation. The simplified calculation formula is defined in the specification. The method is a deflecting flow surface parameter design method based on a combination of the arc section and the deflecting flow section of the steep slope seawall; and basic theoretical support and calculation methods are provided for effectively solving the difficult problems of tidal watching safety and tidal bore landscape maintenance of the steep slope seawall.

The invention discloses a Beidou-based net cage sea area tidal bore early-warning device and early-warning method and belongs to the field of cultivation risk early warning. The device comprises a cultivation area, wherein a cultivation net cage monitoring assembly is arranged in the cultivation area and located at the front section of the incident flow direction of the cultivation area; a monitoring assembly is used for feeding monitored water flow parameters back to the satellite, and the satellite can send control signals to control the aquaculture net cage to sink and float in water; the monitoring assembly comprises a first floating block floating on the water surface, a protective cage body is hung at the bottom of the first floating block, a flow meter is hung in the protective cage body, a signal transmitting assembly is arranged on the upper portion of the first floating block, and a second balancing weight is arranged at the bottom of the water area at the front section in the incident flow direction of the first floating block and connected with the first floating block through a grass prevention rope. According to the device, the tidal bore arrival time can be accurately judged, the obtained data is accurate, the false alarm rate is low, early warning processing is timely carried out on the breeding equipment, and breeding loss is reduced.

The invention relates to a large-span tide-blocking service gate, and belongs to the technical field of gates. The large-span tide-blocking service gate comprises a gate body, a rotation driving device, a sediment pressure sensing device, a first deposited sediment cleaning device, a second deposited sediment cleaning device and a controller, wherein the gate body comprises a lower gate body and an upper gate body which are arranged in a split mode, the lower gate body is used for being arranged at the river bottom, the two ends of the lower gate body in the length direction are used for being rotationally matched with gate piers on the two sides of a river mouth, the lower gate body is rotationally matched with the river bottom, the upper gate body is arranged above the lower gate body, the upper door body and the lower door body are in sliding and sealing fit, and the upper door body can move in the width direction of the river mouth relative to the lower door body. The large-span tide-blocking service gate is used for a strong tidal bore river mouth ship lock, and is safe, stable and low in maintenance cost.

The invention discloses an inning casting construction spur dike construction method in a strong tidal bore area. The method comprises the following steps of (a), construction preparing; (b) stone exploiting; (c) measuring and staking out; (d) in-position of dump tucks and barges; (e) performing bottom protection by casting of the barges; (f) propelling by small spring tides; (g) widening and heightening by large spring tides; (h) protecting the slopes of two sides of a spur dike by casting of the barges and extending to perform the bottom protection. According to the inning fusing construction spur dike construction method in the strong tidal bore area, the wastage rate of rocks when the rocks are cast in the strong tidal bore area is reduced, the dike stability is kept, the work period is shortened, the construction progress is accelerated, the environment is protected, massive manpower and labor and investment of machinery equipment are saved, the engineering construction cost is reduced, and when the spur dike is built, the bottom protection is performed firstly by the casting of the barges to prevent the earthwork of the dike head from degradation, and the wastage of the rocks of the dike head caused by washing of spring tides is reduced.

The invention discloses an automatic tidal bore observation system and method, and belongs to the field of tidewater observation. The system comprises a control center and an onsite station, the onsite station collects water level data and uploads the water level data to the control center, and the control center receives the water level data, analyzes, calculates and extracts the water level data, and pre-judges tidal bore time of the next day. Thus, the tide level and tidal arrival time can be measured and transmitted accurately automatically in real time, and the system and method are characterized by being automatic, informational and intelligent.