9results about "Full-field flow measurement" patented technology

The application discloses a marine shipborne wind measuring device and a wind measuring method, which comprises a left fixing plate arranged on the left edge of the upper surface of the deck of a ship body, a right fixing plate arranged on the right edge of the upper surface of the deck of the ship body, two connecting mechanisms arranged on the left fixing plate and the right fixing plate respectively, a left vertical rod limiting sleeve and a right vertical rod limiting sleeve connected with the two connecting mechanisms respectively, a left square vertical rod and a right square vertical rod in sliding connection with the left vertical rod limiting sleeve and the right vertical rod limiting sleeve respectively, and a left counterweight and a right counterweight arranged at the lower ends of the left square vertical rod and the right square vertical rod respectively. The application has the characteristics of effectively reducing the influence of the space movement of the ship body on the wind measuring device, high measuring accuracy and good measuring stability.

Aspects of this disclosure are directed to optical probes for collecting images of a region of interest for determining wall shear stress. The optical probe includes an imager with a line of sight and a light guide configured to steer light from a light source to the region of interest. The optical probe includes an objective configured to focus light reflected off of the region of interest to the line of sight of the imager. The optical probe can include a micro-lens array at the objective. The micro-lens array can focus light from the objective onto the imager. The imager can collect images from the light from the micro-lens array for determining wall shear stress at the region of interest.

This invention relates to the field of water flow velocity measurement technology, and particularly to a method and system for dynamic state estimation of electronic buoys in water flow velocity measurement. The method employs BeiDou dual-frequency RTK positioning technology to obtain the observation position of the electronic buoy; it uses the universal transverse Mercator projection method to convert the longitude and latitude of the reference point into east and north distance coordinates, which serve as the origin of the electronic buoy observation coordinate system; it then converts the subsequently acquired electronic buoy observation position into east and north distance information, and performs difference calculations with the origin of the electronic buoy observation coordinate system to obtain the east and north distance offsets of the electronic buoy, which are used as measurement information; a dynamic state estimation model for the electronic buoy is constructed; and the measurement information is used as input parameters for a UKF filtering algorithm to perform real-time estimation of the electronic buoy's motion state. This invention directly processes the nonlinear characteristics of electronic buoy motion and water flow disturbances through a nonlinear Kalman filtering algorithm, significantly improving the accuracy and stability of state estimations such as velocity and heading angle.

An artificial intelligence (AI) device and methods for recognizing wind along a projectile trajectory path by recognizing winds effect on a string. The string is the teacher. Embodiments include a deep learning model implemented as convolutional neural networks to detect a string and identify wind direction and speed along at least a segment of the projectile trajectory path to a target. The AI is trained with images (photos and or video) and / or audio recordings of strings as well as wind direction and speed at number of points along the projectile trajectory path. One embodiment supports the string with a rod having a predetermined pattern of dark bands and light bands. The trained, portable AI device recognizes a string in real time. When optimum wind speed is sustained for brief time, a green light is illuminated. An aiming point is adjusted for range and crosswind.

A measurement system (100) for the flow velocity of a liquid, in particular a flow in an aquifer, is proposed, the measurement system (100) comprising: - an assembly (E) of at least one sensor (1), each sensor (1) of the assembly (E) of sensors comprising: - a body (2) configured to undergo a driving force of the liquid, - a connecting element (3) connected to the body (2), the body (2) being configured to exert on the connecting element (3) a force dependent on the driving force of the liquid, - a force sensor (4) configured to determine the force exerted by the body (2) on the connecting element (3), - an electronic calculation unit (30,35) configured to determine, for each sensor (1) of the assembly (E) of sensors, a flow velocity of the liquid from the force determined by the force sensor (4) of said sensor (1). Figure from the summary: Figure 2

The present application relates to river flow measurement technical field, specifically at a kind of river flow measurement method and system based on unmanned aerial vehicle, the method includes: at target river section, through unmanned aerial vehicle synchronous collection water surface radar point surface flow velocity and video surface flow velocity field;According to radar point surface flow velocity, video surface flow velocity field is fused and calibrated, and correction surface flow velocity field is obtained;According to the real-time water level data of target river section, water surface gradient data and section width-depth ratio, adaptive conversion coefficient field is determined, and correction surface flow velocity field is converted into perpendicular line average flow velocity field by adaptive conversion coefficient field;According to perpendicular line average flow velocity field, real-time water level data and riverbed topography data, the instantaneous flow of target river section is determined.The present application improves the measurement accuracy and its reliability of river flow measurement by non-contact means.

A ship lock structure weather linkage salt prevention system is composed of a salt prevention facility, a weather facility and a computer control system. The salt prevention facility is composed of a salt collection pit and a mixed gas curtain, and the mixed gas curtain is composed of fixed gas curtain nozzles and mobile gas curtain nozzles. The weather facility is composed of a flowmeter, a wind direction indicator and an anemometer, which can observe the flow rate, flow direction, wind speed and wind direction of the location of the ship lock structure in real time. The computer control system can monitor the salinity value, flow rate, flow direction, wind speed and wind direction of the location of the ship lock structure in real time, and determine whether to start the mixed gas curtain according to the salinity value, and determine whether to start the fixed gas curtain nozzles and the mobile gas curtain nozzles according to the flow rate, flow direction, wind speed and wind direction.

A flow field prediction device 1 include: an analysis result acquisition unit 14 that acquires an analysis result based on a first computation method of analyzing at least an influence between buildings with respect to a flow field in which a city block including a plurality of buildings is set as a target region; and a prediction processing unit 15 that inputs a new analysis result acquired by the analysis result acquisition unit to a learning model trained using teaching data that includes an analysis result based on a second computation method that is more accurate than the first computation method, as correct answer data for input data including at least the analysis result based on the first computation method, and outputs an output from the learning model as a prediction result of the flow field.