242 results about "Stream gauge" patented technology

The invention discloses a measuring method for inversing reservoir feeding flow procedure, comprising the steps: step I, performing observation and sampling to obtain the information of reservoir water level and discharging flow via a water level in front of the reservoir dam; step II, building a data assimilative state model and an observation model according to the information obtained in the step I; and step III, ascertaining the reservoir feeding flow procedures by a data assimilation algorithm according to the state model and the observation model obtained in the step II. The method disclosed by the invention can be used for ascertaining the reservoir feeding flow; compared with the prior art, the method disclosed by the invention can ensure smooth reservoir feeding flow, and avoid exceptional data like negative values and the like of the flow; the method also can supply the reservoir feeding flow procedure of minute time step, so as to reflect the flood peak information more truthfully; in addition, the method disclosed by the invention has low precision requirement to the water level gauge on the reservoir dam, so that the building and management costs of water level measurement stations are saved.

The invention discloses a low-influence region rainwater treatment and utilization system and a region rainwater treatment method. The system comprises a retention type gutter inlet, wherein the retention type gutter inlet is separately connected with a rainwater impounding reservoir and a rainwater storage tank respectively through pipes, the rainwater storage tank is used for collecting water or rainwater abandoned from the retention type gutter inlet and overflowed from region greenbelts or grass planting swales, a filtering device is arranged in the rainwater impounding reservoir, and the rainwater impounding reservoir is connected with a drip irrigation system. The low-influence region rainwater treatment and utilization system further comprises a garage top plate drainage ditch, wherein the garage top plate drainage ditch is connected with a rainwater filtering well, and the rainwater filtering well is connected with the rainwater impounding reservoir. The system further comprises multiple underground permeation piles. The system promotes rainwater permeation towards the underground and improves the water permeation speed through the arranged permeation piles, is high in automation level, measures the water amount in the rainwater impounding reservoir through a water level gauge, automatically performs switching when the rainwater amount is insufficient, adopts reclaimed water for water supply, reduces the damage of earlier-stage project construction to formation bearing and decreases the sinking situation of the earth's surface caused by rainfall.

Disclosed is a water level monitoring method based on cluster partition and scale recognition. The water level monitoring method comprises the following steps: 1) obtaining an original image at time t from a real-time monitoring video; 2) intercepting a water gauge area in the original image, and marking an end of the water gauge as a position of the water level; 3) binarizing an image of the water gauge area, and dividing the image of water gauge area processed by a cluster method into several subsections according to three sides of symbol “E”; 4) recognizing a content of each subsections, and obtaining a numerical value in a last subsection containing numbers prior to an area where the water level is located; and 5) calculating and displaying the water level according to the height of the subsections and the numerical value obtained in step 4).

A method for controlling the gate based on the habitat requirement for fish overwintering in rivers. According to the characteristics of biological habitat of the river and the habitat demand of fishes during overwintering, the method specifically comprises the steps of: firstly, determining candidate fishes for ecological flow calculation though fish resources investigating and historical data, and then screening out the target fish by adopting hierarchical analysis method; Secondly, establishing a quantitative response relationship curve between target fish physiological adaptions and water temperature, obtaining ecological water level which ensures the target fish overwintering safely according to the vertical temperature distribution, and establishing the relation between water depth and discharge using hydrodynamic model; finally, setting up a gate control system including a radar water level meter in the overwintering areas and an ecological water level management system in a gate control room.

The invention belongs to the field of hydraulic experimental model facilities and particularly relates to an automatic control type circulating water tank for simulating the instantaneous dam break. The circulating water tank comprises a water tank, a gate, a water level control system and a gate lifting control system. The water level control system comprises a water injection pipe, a water inlet pipe and a water guide pipe which are connected through a three-way pipe fitting, wherein the water guide pipe is connected with a circulating water pump. The water level control system further comprises a gate upstream water level gauge and a gate downstream water level gauge, wherein the gate upstream water level gauge and the gate downstream water level gauge are respectively arranged in a gate upstream water tank and a gate downstream water tank. The gate lifting control system comprises a vertical rack arranged on the front surface of a gate door plank and matched with the driving gear of a motor, and a lifting guide rail fixedly erected on the water tank along a guide rail. During the lifting process of the gate door plank, a pair of vertical guide bars on the back surface of the gate door plank are always fittingly kept in the vertical guide grooves of the lifting guide rail. An automatic air drying device is arranged in the gate downstream water tank, so that the conduction of dry bed experiments is facilitated. The circulating water tank is stable, automatic and efficient.

The invention provides a self-rescue device in case of drowning of a car. The self-rescue device in case of drowning of the car comprises a power supply, a water level gauge, a control module and blasting parts. The power supply is electrically connected with the control module, the control module is connected with the water level gauge and the blasting parts, the water level gauge is arranged at the medium-height position in the middle of a cab of the car, and a plurality of the blasting parts are arranged at the four corners of each piece of window glass. When doors and window glass cannot be opened in case of drowning of the car, water flows into the cab gradually from the periphery of the car, when water in the cab is accumulated to reach certain depth to be in contact with the water level gauge, the water level gauge senses the water level in each direction and transmits the water levels to the control module, when the control module judges that the blasting water level is reached, the control module controls the blasting parts in the direction opposite to the direction in which drowning firstly occurs to strike the corresponding window glass to burst the window glass, so that passengers in the cab can escape from the cab through the window.

A water level measurement system including: a water level gauge including a scale part which is installed to extend upward at a predetermined angle of inclination from a water surface; and an unmanned aerial vehicle including image capturing means for capturing the scale part from above and a plurality of rotary wings, and is also solved by a water level control system including the water level measurement system and water level adjustment equipment capable of adjusting an amount of water in a water area in which the water level gauge is installed, wherein the unmanned aerial vehicle includes the water level determining unit and water level control means for remotely operating the water level adjustment equipment through wireless communication, as well as a water level measurement method and a water level control method using the above systems.

A system for measuring freeboard height of a ship and a measuring method thereof are disclosed. The system for measuring that freeboard height of a ship comprises a steering gear, a lidar, a water level gauge and an MCU controller, wherein the steering gear is fixed on the bottom of a bridge; the lidar is fixed on the steering gear and rotates with the steering gear; the water level gauge is fixedon the shore and arranged below the water surface; and the MCU controller is used for controlling the steering gear to rotate and receiving the data measured by the lidar and the water level gauge, and transmitting the data to the remote server for processing and analysis. The system for measuring that freeboard height of a ship has the advantages that as the combined measuring method of the lidar and the water level gauge is comprehensively used, the water level can be monitored in real time, and the freeboard height of the ship can be accurately measured, and the overload problem of the ship can be monitored, and the environmental impact of the measuring method is small, and certain accuracy can be maintained at night and in various climates.

The invention discloses a meteorological monitoring system and a meteorological monitoring system for the early warning of rock slope landslide, and belongs to the field of an environment monitoring technology. The meteorological monitoring system comprises a water pressure gage buried on a sliding surface, and a water level indicator arranged at the top of a trailing edge pulling crack; the meteorological monitoring system further comprises a wireless remote system which is connected with the water pressure gauge and the water level indicator through data wires, and an operating system which receives the water pressure monitoring data and water level monitoring data of the wireless remote system. Field monitoring data is transmitted to the operating system through wireless signal transmission, and an early warning value and a field valve can be given simultaneously by a monitoring software in the operating system, therefore the subjectivity of the a man-made set prewarning value can be prevented, and the automatic remote monitoring and landslide forecasting and early warning can be realized. The monitoring system provided by the invention does not need to install a drilling clinometers and a stress sensor based on water level monitoring, therefore the construction difficulty and monitoring cost can be reduced.

The invention aims to provide a constant-flow bubble type automatic water level measurement device with micro power consumption, which comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a data acquisition device used as core control equipment, a manual register connected through a RS 232C serial port, a constant-flow bubble type water gauge and a barometer connected through an SDI-12 interface, communication equipment connected through a RS 232C serial port, and a 12V DC power supply source of a double-core interface; and the indoor unit comprises a centralized controller with built-in application software, communication equipment connected through a RS 232C serial port, and an AC/DC power supply source, and is connected with the outdoor unit through a communication channel. The device overcomes the defect that the measurement errors of national and international constant-flow bubble type water gauges increase along with the increase of water level amplitude, makes up for errors neglected by other constant-flow bubble type water level measurement devices, effectively improves the water level measuring precision, and can be widely applied to automatically measuring water level under various field environments.

The invention relates to an experimental area underground water level accurate control system and method. The experimental area underground water level accurate control system comprises a sandstone percolation layer in which a water supply and drainage pipe network is horizontally and vertically arranged in an embedded way. The water supply and drainage pipe network is at least connected with a vertically arranged prefilling drainage well through a communicating pipe. The bottom part of an underground water level logging well is provided with an underground water level indicator. The communicating pipe is provided with a communicating valve and a water supply and drainage pressure gauge. The bottom part of the prefilling drainage well is provided with a prefilling drainage level indicator. A water inlet pipe is provided with a water inlet valve and a water inlet flowmeter. A water outlet pipe is provided with a water outlet valve and a water outlet flowmeter. The water level in the prefilling drainage well is controlled based on the height of the underground water level of an original soil layer and other various parameters, and the water level of the original soil layer is influenced by water pressure of the prefilling drainage well so that the objective of accurately controlling the underground water level of the original soil layer can be achieved. The water level of the prefilling drainage well is quite easy to control, and pressure of the prefilling drainage well can also be rapidly transferred to the original soil layer so that rapid and efficient underground water level adjustment can be realized.

A water level gauge according to one aspect of the present invention includes a first communicator configured to receive a first wireless signal indicating an absolute value of water pressure from a water pressure sensor device capable of measuring the absolute value of the water pressure, and a water level calculator configured to calculate a water level on the basis of the absolute value of the water pressure indicated by the first wireless signal received by the first communicator and an atmospheric pressure measured by a barometer.

The invention provides a sound wave water level gauge which comprises a sound wave transceiver and a processor. The transceiver and the processor are sleeved with an echo chamber. The inner wall of the echo chamber is provided with an annular reflection ring. According to the sound wave water level gauge, the transceiver and the processor are sleeved with the echo chamber, and the inner wall of the echo chamber is provided with the annular reflection ring, when a specific area is measured, all the components are installed in place, sound waves are sent out through the sound wave transceiver, and the sound waves are reflected through the reflection ring on the echo chamber; due to the fact that the certain distance is formed between the reflection ring and the sound wave transceiver, the sound waves are received by the sound wave transceiver and then calculated through the processor, accordingly, the propagation speed of a sound in the specific environment is figured out, the height of the water level is measured based on the speed, and more accurate data can be obtained.

The invention belongs to the field of sensor measurement, and in particular relates to a method for automatically measuring water level by adopting a constant-flow bubble type water gauge, which comprises the following steps: measuring vertical height difference H of two ports of an air duct and mounting height h0 of an air exhaust; inputting a gravity acceleration g, the height difference H of the two ports of the air duct and the mounting height h0 of the air exhaust into a data acquisition device through a register; acquiring a pressure output value P0 of the constant-flow bubble type water gauge and a gas temperature T in the duct by the data acquisition device in fixed time; and acquiring a pressure output value PA of a barometer by the data acquisition device in fixed time. The invention provides the method more accurate than classic pressure water level relation conversion formula, and discloses that the vertical height difference of the two ports of the air duct is the main reason for influencing the measuring precision of the constant-flow bubble type water gauge, but not the difference of the gravity acceleration or water density. The method can effectively reduce the water level measurement error, and has more obvious effect particularly when the vertical height difference of the two ports of the air duct exceeds 10 meters.

The invention discloses a reservoir water rain condition automatic forecasting system which comprises a stand rod, detecting equipment, collecting equipment and a monitoring center. The detecting equipment comprises a water level gauge, a rain gauge and a camera. The water level gauge comprises a water level gauge probe and a water level gauge body. The water level gauge probe is arranged in a stainless steel net box. The water level gauge body is arranged in the collecting equipment. The water level gauge probe and the water level gauge body are connected through a waterproof cable. The stainless steel net box is arranged below a dead water level. Water level data obtained by measuring of the water level gauge probe are sent to the water level gauge body through the waterproof cable. The collecting equipment is placed in the middle of the stand rod and is used for collecting water level data, rainfall data and picture information detected by the detecting equipment, and the water level data, the rainfall data and the picture information are transmitted to a monitoring center in a telecommunication mode. Construction is easy, cost is low, maintaining is convenient, and measured data of the water level gauge are high in reliability.

The invention provides an integrated water level and soil humidity monitor for an over-wet ground surface environment. The monitor is rod-shaped as a whole and comprises a soil humidity meter and a water level indicator which are integrally connected, the monitor is inserted into a monitored area, an intelligent chip built in the monitor is respectively connected with the soil humidity meter and the water level meter through a circuit, conversion between water level measurement and soil humidity measurement is automatically achieved according to the condition whether water accumulates on the ground surface or not, a storage device receives data measured by two sensors, and the intelligent chip can achieve setting of a sampling period and unit conversion according to needs of a user. The integrated water level and soil humidity monitor for the over-wet ground surface environment can automatically achieve uninterrupted automatic monitoring and recording in dry, humidity and water logging processes of the ground surface environment, and can further prevent loss of soil humidity monitoring data in a long time sequence under the over-wet ground surface environment. The monitor is high in integration level and convenient to install and maintain, has a data backup function, can ensure stability of acquisition and storage of monitoring data during a long time and is suitable for completing measurement work under the over-wet ground surface environment.

The invention relates to the technical field of early warning equipment, and discloses a method for reckoning flood and overflow occurrence time according to meteorological data, which comprises the following steps of 1) installing non-contact ultrasonic water level gauges in culverts, pools, reservoirs, lakes and the like which need early warning in advance. According to the method for reckoningflood and overflow occurrence time according to meteorological data, associated determination is carried out through rainfall of different levels and water level changes, an initialized calculation model can be automatically established by accumulating real data to acquire and classify original data generated by rainfall of six levels in real time, therefore, the volume of an area needing to be calculated does not need to be measured manually, and the calculation accuracy is improved by refining the minimum calculation unit time and the rainfall water level. Meanwhile, the more the accumulated data is, the longer the use time is, the higher the calculated data and the foreseeable accuracy are, manual calibration is not needed; and the equipment is low in overall cost and low in human input and maintenance cost.

The invention discloses a jacket type hydrologic observation device. The observation device comprises a jacket supported on the sea level through a supporting rack, and the top of the supporting rack is provided with a mounting box having an inner cavity; a battery, a data acquirer and a memory are arranged in the mounting box; the top of the mounting box is provided with an anemometer and an anemoscope; a buoy and a water level gauge are connected to the internal of the mounting box or to the jacket through a connecting element, and the buoy and the water level gauge are arranged in the sea level; the battery supplies power to the data acquirer, the memory, the anemometer, the anemoscope and the water level gauge; and the data acquirer is used for storing data monitored by the anemometer, the anemoscope and the water level gauge in the memory in real time. The device has the advantages of simple structure, convenience and high efficiency in use, and effective reduction of the offshore working time and the workload.

An automatic calibration system for a water level indicator of a high-head lock comprises a PLC, an industrial control upper computer and nine water level indicators, wherein the nine water level indicators are arranged at four water level points and are respectively a first water level indicator, a second level indicator, a third water level indicator, a fourth water level indicator, a fifth water level indicator, a sixth water level indicator, a seventh water level indicator, a eight water level indicator and a ninth water level indicator, the first water level indicator, the second water level indicator and the third water level indicator are arranged outside an A gate or a base point, the fourth water level indicator and the fifth water level indicator are arranged at an A side of a gate chamber, the sixth water level indicator and the seventh water level indicator are arranged at a B side of the gate chamber, the eighth water level indicator and the ninth water level indicator arearranged outside a B gate, and the water level indicators are all connected to the PLC. Sensors of the water level indicators are used for transmitting instantaneous water level data to the PLC, andthe PLC controller is used for processing the data, calculating a correction value of each water level point and calibrating the water level indicators by changing zero-point parameters of the water level indicators. By the system, the reading accuracy and reliability of lock water level indicators is greatly improved, the purposes of running safety and transport efficiency of lock equipment system are achieved, and an idea and a direction are provided for research on automatic control of the water level indicator in the lock industry.

The invention relates to an intelligent system tester for detecting thermal fatigue performance of a metal material; the intelligent system tester comprises a support frame, a heating furnace, a lifting device, and a cooling water tank; the top end of the support frame is connected to the lifting device, the lifting device drives a sample to cyclically move between the heating furnace and the cooling water tank so as to heat or cool the sample, a temperature sensor and a pressure level are arranged in the cooling water tank and used for sensing water temperature and water level in the cooling water tank, and if the water temperature and the water level are not in conformity with set values, an intelligent control device controls a sensing faucet and a thermal circulator to act to keep the water temperature and water level constant; the cooling water tank is a three-cell cooling water tank, and the three water cells may receive three different cooling media so as to simulate various cooling environments. The intelligent system tester main gain improved test efficiency and may acquire more accurate experimental data. Compared with traditional equipment, the intelligent system tester may also carry out automatic test through an intelligent program.

A water filling system for a reactor water level gauge is provided for filling a reactor water level gauge instrumentation pipe in a reactor building with water and filling the reactor water level gauge with water even in an unexpected abnormal event where the reactor building is brought into a highly radioactive environment. The water filling system for a reactor water level gauge includes a water filling instrumentation pipe guided from the reactor water level gauge instrumentation pipe in the reactor building to an outside of the reactor building and filling the reactor water level gauge instrumentation pipe in the reactor building with water even in an unexpected abnormal event of a nuclear power plant.

The invention discloses a interference elimination method for water level measurement based on a planar radar water level gauge. A multi-input multi-output radar antenna is used. Objects at differentpositions in a radar irradiation range can be distinguished, so that interferents such as a river levee can be eliminated; objects made of different materials can be distinguished, so that the water surface can be distinguished from other objects; when the interferent enters the center of the measurement range, interference of objects such as floaters and ships can be eliminated by analyzing whether the interferent is the water surface or not; and measurement errors are reduced, and measurement is more accurate.