86 results about "Current meter" patented technology

The invention discloses a real-time measurement method and device for total phosphorus flux in water, and relates to the technical field of water quality monitoring, and the method comprises the following steps: S1, arranging a radar wave current meter on a monitoring section, and obtaining real-time flow data; s2, installing a multi-parameter water quality sensor array to obtain conventional water quality index data; s3, establishing a multi-parameter coupled long short-term memory (LSTM) network inversion model, and inverting total phosphorus concentration data; s4, calculating the total phosphorus flux in real time according to a flux calculation method, uploading the total phosphorus flux to a cloud platform, and enabling the relative error between inversion data and real data to be smaller than 15% of a sensor, thereby proving that the inversion method of the scheme has very high precision, and because the error range of the inversion data is relatively small, the reliability of the inversion method is relatively high; according to the method, the inversion data can be more reliable, so that a more accurate and scientific decision can be made, the inversion data can more accurately reflect the actual total phosphorus concentration condition due to the high precision, and reliable data support is provided for water quality monitoring and management.

The invention relates to a lightning arrester leakage ammeter self-calibration method and system, and the method comprises the following steps: disconnecting a main leakage ammeter from an external main measurement loop, and closing a calibration loop of a redundancy calibration sensor and a reference current source after a preset time is delayed; controlling a reference current source to output standard signals with different current magnitudes, collecting the standard signals by using a redundancy calibration sensor, extracting effective signal components, and performing environment compensation; iteratively calculating a relative error between the effective signal component and the standard signal, if the relative error is less than or equal to a second threshold value, updating a calibration coefficient according to a ratio of the standard signal to the effective signal component, and correcting a measurement result of the main leakage ammeter based on the calibration coefficient; if the relative error is greater than a third threshold value, locking output and uploading fault information; otherwise, recording as one exception, and carrying out maintenance early warning according to the number of exceptions. Compared with the prior art, the self-checking and real-time calibration of the leakage ammeter of the lightning arrester can be completed on the premise of not influencing the operation of power equipment.

The invention discloses a flood flow early warning method, a controller, a storage medium and a program product, and relates to the field of hydrological monitoring and disaster early warning. By adopting the technical scheme, after an emergency flow meter emits a first frequency modulation continuous wave to the water surface at the current position, the controller receives a first signal reflected by the water surface and analyzes the spectrum characteristic of the first signal; therefore, the stratified flow phenomenon of the water body is effectively identified. After the emergency flow velocity meter emits a second frequency modulation continuous wave to the water surface at the current position, the controller receives a second signal reflected by the water surface, determines the surface flow velocity and the subsurface flow velocity through the first signal, the second signal and a preset flow velocity calculation formula, and calculates the comprehensive flow velocity by combining the water flow layering coefficient; and finally, flow calculation is performed according to the section coefficient and the actually measured water level. According to the multi-level flow velocity measurement and analysis method, the accuracy of flood flow calculation is remarkably improved, when the instantaneous flow exceeds the preset flow threshold value, early warning is given out in time, and important support is provided for flood prevention and flood fighting.

Systems and Methods for capacitance testing of a unit under test with parasitic capacitance directed to a guard rail. The system includes test points, wherein the plurality of test points are divided into at least two groups; a stimulus source; a first group guard relay electrically connected to each of the test points in a first; a second group guard relay electrically connected to each of the test points in a second; a guard rail coupled to the first group guard relay and the second group guard relay; a first group return relay electrically connected to each of the test points in a first group; a second group return relay electrically connected to each of the test points in a second group; a current measurement rail coupled to the first group return relay and the second group return relay; a current meter coupled to the measurement rail; and a controller.

The embodiment of the invention relates to an electricity meter data complementary reading method, which is applied to a concentrator terminal and comprises the following steps: sending a data reading instruction to all electricity meters according to a preset physical address sequence at the beginning of each preset meter reading period; if the effective collection data fed back by the electricity meter is not received within the preset overtime threshold value, establishing a collection missing queue according to the electricity meter information, the data information and the time information; and in the current meter reading period, after the current round of data acquisition is completed, calculating the residual idle time of the current meter reading period and the estimated single-time additional reading time consumption, and performing data additional reading according to the residual idle time of the current meter reading period and the estimated single-time additional reading time consumption. According to the technical scheme provided by the embodiment of the invention, the data which is not successfully acquired is subjected to supplementary reading by utilizing the remaining time of the current meter reading period and the subsequent meter reading period, a layered priority supplementary reading mechanism is provided, the timeliness and fairness of data supplementary reading are considered, and the loss risk of long-term missing acquisition of data can be avoided.

The invention discloses a flow field adaptive calculation method and system based on an acoustic Doppler flow meter. Comprising the following steps: acquiring original frequency spectrum data and synchronous attitude, position and water level information of a Doppler current meter; performing preprocessing and quality marking on the original data; multi-dimensional features are extracted, and a current dominant flow field type is identified through a pre-trained flow field classification model; adaptively selecting a flow velocity profile reconstruction algorithm according to the flow field type, and dynamically adjusting key algorithm parameters according to flow field stability or turbulence intensity parameters in the reconstruction process; a calculation grid is dynamically generated based on a flow velocity field of a reconstruction strategy to perform flow integral calculation, and data, a model and an integral error are comprehensively evaluated to quantify uncertainty of an output flow result; and finally performing flow field abnormity diagnosis, short-term flow trend prediction and equipment health state early warning. According to the method, the problem of insufficient precision of a traditional fixed algorithm in a complex flow field is solved, and the reliability and the intelligent level of flow monitoring are remarkably improved.

The invention relates to an open boundary circulating flow and reconfigurable terrain collaborative maritime work scouring intelligent test system and test method, a maritime work structure test model is installed at the center position of a main body structure inner cavity test section, and a set area with the maritime work structure test model as the center is used as a main test section; the open-boundary circulating flow generation system realizes back supplement and closed-loop operation of circulating water channels of the left bank and the right bank; a multi-beam three-dimensional terrain scanner is installed on the side portion of the large-span electric measuring bridge system, and sand bed terrain and scour pit three-dimensional shape data are obtained; a three-dimensional acoustic Doppler current meter and a capacitive wave height meter are installed on the track type instrument bridge measuring system, and multi-dimensional dynamic monitoring is conducted on the sand bed terrain and the scouring pit; the multidirectional irregular wave generation system is used for simulating regular waves and irregular waves in an offshore environment. According to the invention, the aspects of structure scale, terrain coupling and measurement and control feedback intelligence are comprehensively upgraded, and a more real and reliable test basis with strong engineering adaptability is provided for research on scouring stability of major ocean engineering.

The invention provides an offshore wind power pile foundation scouring real-time monitoring system which comprises an underwater camera, a rotatable scanning sonar, a single-point flow velocity meter, an acceleration sensor, a fiber grating sensor and a data processing transmission unit which are cooperatively used. Synchronous monitoring of the seabed terrain around the pile, the scour depth and range, the ocean current flow velocity and flow direction and the pile foundation vibration response acceleration signal and strain signal is achieved; the data processing and transmitting unit completes collection and fusion analysis of multi-source data and transmits a monitoring result to a land monitoring station in real time. According to the system, collaborative real-time monitoring of multi-element parameters of ocean current-scoured terrain-structural response is achieved, the dynamic evolution law of the seabed terrain is accurately mastered, a dual verification mechanism of directly detecting the scour depth by scanning sonar and inversing the scour depth by structural vibration response is adopted, the scour depth monitoring precision can be greatly improved, and the real-time performance of the system is improved. And reliable data support is provided for long-term safe operation, structural health assessment and scouring protection design of the offshore wind turbine.

The invention discloses a detection device and a detection method for structural defects of a full-water drainage pipeline. The detection device comprises a ground operation unit and an underground detection unit, wherein the ground operation unit comprises a handheld flow velocity display and a sonar operation feedback platform, and the handheld flow velocity display and the sonar operation feedback platform are in signal connection with the underground detection unit through a flow velocity meter data transmission line and a sonar data transmission line respectively; the underground detection unit comprises a Doppler current meter, a two-dimensional surface real-time image sonar and a cross-shaped fixed rod head, the cross-shaped fixed rod head is used for integrating and fixing the Doppler current meter and the two-dimensional surface real-time image sonar, and the detection unit is deployed in a full-water operation drainage system; the two-dimensional surface real-time image sonar can adjust the sound wave frequency, identifies the structural defect of the pipeline through the sound wave reflection difference, and transmits the defect information to the sonar operation feedback platform; the Doppler current meter is used for collecting flow velocity and flow data in the pipeline and transmitting the data to the handheld flow velocity display, and the defect position is checked in an auxiliary mode through multi-well-position data comparison.

The invention provides a flow velocity meter and a frequency adaptive adjustment method thereof, and the method comprises the steps: determining an effective frequency bandwidth of flow velocity data under a current working condition through obtaining the flow velocity data collected by a flow velocity sensor; calculating the target sampling frequency of the flow velocity meter based on the effective frequency bandwidth and the flow state change period of the medium in the water resource treatment pipeline; the current flow state category and the working condition stability level are judged based on the collected temperature, pressure and flow combined change characteristics; finally, the target sampling frequency is adjusted according to the current flow state category, the frequency adjustment amplitude is enhanced according to the working condition stability level, the adjusted sampling frequency serves as the measurement frequency of the flow meter to be output, and the steps are periodically repeated to achieve self-adaptive updating of the measurement frequency. According to the scheme, adaptive optimization of the measurement frequency can be realized, and the measurement precision is improved.

The invention discloses a wading rigid bridge cofferdam stability real-time monitoring method based on multi-source sensing, and belongs to the technical field of bridge construction safety monitoring. According to the method, a structure-hydrological multi-source sensor is arranged, and displacement, strain, scouring and water flow data are collected in real time through a cofferdam top receiver, a main rib fiber grating sensor, a base osmometer, a multi-beam depth finder and a current meter; and reversely correcting cofferdam material parameters based on a digital twinborn model, dynamically calculating an anti-sliding coefficient and an anti-overturning coefficient, predicting a deformation trend in combination with an LSTM neural network, and setting first-level early warning and second-level early warning. According to the method, the problems of lagging of traditional monitoring data, limitation of single-dimensional analysis and high false alarm rate of an empirical threshold are solved, short-time instability risk identification is realized, and the false alarm rate is reduced at the flow velocity gt; accurate monitoring is kept in a 3m / s torrent environment, and the safety of deepwater construction is remarkably improved.

The invention relates to the technical field of hydrological monitoring, and provides a hydrological total-factor monitoring buoy and a using method thereof.The hydrological total-factor monitoring buoy comprises a hull-shaped buoy body, the overall length of the hull-shaped buoy body is 3 m, a cabin is arranged in the bow of the hull-shaped buoy body, and a wide-angle groove is formed in the bottom of the stern of the hull-shaped buoy body; an ADCP installed in the wide-angle groove of the hull-type buoy main body; a multi-element integrated design is adopted, core modules such as an ADCP (flow velocity monitoring), a Beidou GNSS (water level and positioning), an online sand meter (sand content monitoring), a solar power supply system and the like are integrated in the hull-shaped buoy main body, an integrated monitoring platform is formed, the repeated construction cost is reduced, and the construction efficiency is improved. Compared with the prior art that facilities such as a water gauge, a flow meter and a sediment measuring station need to be independently deployed in traditional monitoring, multi-parameter synchronous monitoring is achieved through integrated design, repeated hardware investment is reduced, the maintenance difficulty caused by equipment dispersion is reduced through centralized management, and the system is suitable for remote or complex water area environments.

The utility model discloses a sewage monitoring device for water quality environment management, which comprises a current meter body and further comprises a floating installation mechanism, the floating installation mechanism comprises a U-shaped pipe clamp A, an L-shaped pipe, a vertical guide pipe, a guide pipe, a U-shaped pipe clamp B, a triangular cover, a floating block, a connecting rope and a limiting ring, the current meter body is pressed above a long pipe body of the L-shaped pipe, and the L-shaped pipe is connected with the vertical guide pipe. By arranging the floating mechanism for installing the flow meter body, the floating mechanism can drive the flow meter body to be installed at a sewage pipe and a detection vertical pipe, and when the water level in the sewage pipe changes, a floating block in a triangular cover of the floating mechanism drives an L-shaped pipe and the flow meter body to float and rise and fall in sewage along with the water level; when the water level in the sewage pipe changes, the flow velocity meter body is always in contact with sewage, and the flow velocity meter body can stably monitor sewage flow velocity data in the sewage pipe and transmit the sewage flow velocity data to a monitoring system of a water quality environment manager for water quality environment management analysis.

The utility model relates to the field of current meter fixing supports, in particular to a hydrological survey current meter positioning and fixing device, and adopts the technical scheme that the hydrological survey current meter positioning and fixing device comprises an annular supporting table, a lifting cylinder, a distribution box, a photovoltaic power generation panel, a lightning rod, an electric cylinder, an external limiting cylinder, a supporting rod and a top platform, the upper end of the annular supporting table is fixedly connected with a lifting barrel, four sets of sliding grooves distributed around the lifting barrel at equal intervals are formed in the outer wall of the lifting barrel, and an electric cylinder is installed on the inner wall of the lifting barrel. Compared with an original supporting frame body, a worker can conveniently adjust the detection height of the current meter according to needs, and the current meter can be lowered to a low position during maintenance so that the worker can maintain the current meter.

The invention relates to the technical field of hydrology, and provides a water flow velocity measurement method and device, and the method comprises the steps: respectively obtaining the first propagation time of a first ultrasonic transducer for propagating a first ultrasonic signal, and the second propagation time of a second ultrasonic transducer for propagating a second ultrasonic signal, and calculating the propagation time difference at the current moment; calculating the water velocity based on the propagation time difference; the direction angle of the first ultrasonic signal and the second ultrasonic signal is a preset angle; the flow meter comprises a flow guide cover, a reflecting plate, a first ultrasonic transducer and a second ultrasonic transducer; the flow guide cover is of a streamline spindle structure; and the reflecting plate is arranged at the intersection of the first ultrasonic signal and the second ultrasonic signal and is connected with the flow guide cover. According to the method provided by the invention, the propagation time difference formed by the reflection of the ultrasonic signal through the reflecting plate is obtained through the flow velocity meter of the streamline spindle structure, the accurate and general water flow velocity measurement is realized, and the velocity measurement performance of the water flow velocity measurement is greatly improved.

Systems and Methods for capacitance testing of a unit under test with parasitic capacitance directed to a guard rail. The system includes test points, wherein the plurality of test points are divided into at least two groups; a stimulus source; a first group guard relay electrically connected to each of the test points in a first; a second group guard relay electrically connected to each of the test points in a second; a guard rail coupled to the first group guard relay and the second group guard relay; a first group return relay electrically connected to each of the test points in a first group; a second group return relay electrically connected to each of the test points in a second group; a current measurement rail coupled to the first group return relay and the second group return relay; a current meter coupled to the measurement rail; and a controller.

The application relates to the technical field of hydrological monitoring and discloses an intelligent hydrological monitoring system based on Internet of Things, which comprises an upper computer, a flow measurement control platform, a network communication module, a PLC controller, a mechanical system and a flow measurement system. The flow measurement control platform respectively instructs the PLC controller and the flow measurement system through the network communication module. The flow measurement system is used for acquiring hydrological monitoring data and uploading the flow measurement control platform. The flow measurement system comprises an ADCP flow measurement, a radar flow measurement, a time-difference method ultrasonic flow measurement, a propeller current meter and a field water level meter. The flow measurement system selects a flow measurement method according to needs at different measuring point positions in the same section to jointly measure the flow. The flow measurement system is equipped with multiple flow measurement methods and is uniformly controlled and dispatched by the flow measurement control platform, so that the monitoring system has good expandability. On this basis, a corresponding flow measurement scheme can be automatically generated according to different water level levels, the advantages and disadvantages of various flow measurement methods are complementary, and the detection precision is further improved.

The utility model discloses a current meter cabin device capable of storing fish lead, which comprises a current meter cabin main body, a cabin cover and a transmission mechanism, the current meter cabin main body is provided with a current meter cabin main body frame, a current meter cabin shell and a transmission mechanism platform, and the transmission mechanism is arranged on the transmission mechanism platform. The flow meter cabin shell is arranged on the fish lead cabin body frame, the cabin cover is arranged on the transmission mechanism, and opening and closing of the cabin cover are achieved through the transmission mechanism. The flow velocity meter cabin device capable of storing the lead fishes is used for storing the lead fishes, and the situation that the service life of the flow velocity meter is shortened due to the fact that the lead fishes are placed on the ground and affected by strong wind to enable the flow velocity meter in front of the lead fishes to rotate is avoided; the hatch cover is driven to be opened and closed through the transmission mechanism, and the problem that the hatch cover occupies large space after being opened can be avoided. And the brush I and the brush II are arranged, the steel wire rope for hanging the fish lead can extend out through the brush I, and the brush II can shield a gap between the flow meter cabin main body and the cabin cover, so that the flow meter cabin is very practical.

The application relates to the technical field of building construction, in particular to a high-water-level silt geology underground water level control device and a construction method, the high-water-level silt geology underground water level control device comprises an outer protective shell, an upper cover, a pressure detection seat, an inner conductive sheet and an outer conductive sheet, the outer protective shell is a cylindrical structure, an outer through hole is formed in the outer protective shell, an outer layer filter membrane is fixedly installed in the outer through hole, and a secondary embedded groove is formed in the inner side wall of a three-stage separation layer. The high-water-level silt geology underground water level control device is composed of the outer protective shell, the upper cover, the pressure detection seat, the inner conductive sheet and the outer conductive sheet, and conductive liquid is injected into a liquid storage cavity and a conductive cavity on the pressure detection seat, so that the liquid level in the conductive cavity changes under the pressure of underground water, the effective conductive area between the inner conductive sheet and the outer conductive sheet changes, the current of a current meter changes, and the pressure of the underground water is monitored.

The invention discloses a splitting reef cleaning intelligent control device and method, and relates to the technical field of splitting reef cleaning intelligent control, and the device comprises a monitoring data collection module, a monitoring data initial processing module, a monitoring index module, a model construction module and an intelligent evaluation control module. Splitting and reef cleaning monitoring data are collected through a Doppler current meter, a radar type tide level instrument, a leveling rod, a level gauge and sensor equipment, the intelligent evaluation control module evaluates the influence degree of water flow and tide on splitting equipment, corresponding measures are taken for response, and the working efficiency is improved. According to the invention, a monitoring data acquisition technology, a neural network algorithm technology and a modern information technology are closely combined, and the influence degree of water source data on the displacement of the splitting equipment and the influence degree of tide data on the water entry depth of the splitting equipment are obtained; the problem that a traditional splitting reef cleaning device and method cannot integrate multiple factors to guarantee the splitting reef cleaning precision is solved.

The utility model discloses a portable radar flow velocity meter which comprises a flow velocity meter body and a bottom plate, the bottom of the flow velocity meter body is slidably connected with a telescopic rod, the bottom end of the telescopic rod is fixedly connected with a rotating rod, the top end of the bottom plate is fixedly connected with two fixing plates, and the rotating rod penetrates through the two fixing plates and is rotatably connected with the fixing plates. A base plate and a limiting ring are arranged on one side of a grip of the current meter main body; according to the utility model, the telescopic rod is arranged at the bottom of the current meter main body, can be stretched out at a proper position and is supported by the bottom plate, so that the stability during measurement is improved, and meanwhile, the cushion plate and the limiting ring are arranged to limit the arm, so that the holding stability is improved, and the situation that the arm slips out of the hand due to non-tight holding is avoided; therefore, the safety and the stability of the device are improved.

The utility model belongs to the technical field of hydrological instrument installation, particularly relates to an efficiency-improved type water and sand element integration device, and provides the following scheme aiming at the problems that various monitoring instruments cannot be installed on an existing installation platform at the same time, and obtained data is single during hydrological monitoring. Comprising a platform main body, a platform head, an empennage mounting plate, a vertical empennage and a horizontal empennage, and can provide a stable and adaptive mounting environment for each device, so that devices such as an ADCP, a current meter, a sand meter and the like can work in an optimal state, and the platform integrates various devices, can be used for synchronously testing flow, sand content, grain composition, bottom sand and the like, and is high in practicability. In one test, flow data are obtained through the flow velocity meter and the ADCP, the sediment condition is analyzed through the sediment meter and the sampler, the multi-dimensional monitoring requirement can be met through one-time operation, the hydrological monitoring efficiency and the data comprehensiveness are greatly improved, and the modern hydrological monitoring development trend is met.

Provided is a vacuum deposition system that, without additional equipment, is capable of effectively suppressing adhesion of a splash onto a deposition object.　A vacuum deposition system ES comprises: a vapor deposition boat 3 that includes a boat body 31 having a storage part 31a of a vapor deposition material Em; a material supply unit 6 for supplying the wire-shaped vapor deposition material from above so as to abut a bottom plate of the boat body; a power source Ps for heating the boat body by supplying power; and a control unit Uc. The vacuum deposition system ES further comprises an ammeter Am for detecting current at the time of energization by the power source, the current changing together with the amount of molten metal when the vapor deposition material melts and is wet-spread in the storage part. The control unit obtains the average value of the current values detected by the ammeter Am per unit time, and changes the current value by controlling the power source on the basis of each of the average values successively obtained.

The present application relates to the technical field of ocean current monitoring, and discloses a kind of ocean current meter data quality control method and system based on adaptive filtering.The original data containing ocean current direction and speed are obtained, after being decomposed into eastward and northward flow velocity components, frequency spectrum distribution is obtained by Fourier transform, dynamic filtering window is determined by adaptive filtering algorithm, components are preprocessed and feature vector is extracted to calculate flow direction;According to whether the amplitude of the feature vector changes is over the threshold, select Kalman filter to smooth the component or directly obtain the corrected flow direction data;The dynamic trend is extracted by principal component analysis method for the corrected data, and the main direction feature set is obtained;Based on the analysis of the influence of tides and topography, the environmental influence weight is obtained;The filtering parameter update frequency is adjusted by the weight, and the real-time component is filtered twice to output high-precision ocean current direction data.This method can improve the accuracy of ocean current meter data quality control and improve the monitoring accuracy.

Systems and Methods for capacitance testing of a unit under test with parasitic capacitance directed to a guard rail. The system includes test points, wherein the plurality of test points are divided into at least two groups; a stimulus source; a first group guard relay electrically connected to each of the test points in a first; a second group guard relay electrically connected to each of the test points in a second; a guard rail coupled to the first group guard relay and the second group guard relay; a first group return relay electrically connected to each of the test points in a first group; a second group return relay electrically connected to each of the test points in a second group; a current measurement rail coupled to the first group return relay and the second group return relay; a current meter coupled to the measurement rail; and a controller.

The utility model discloses an angle-adjustable radar wave velocity measurement device, which comprises a radar wave velocity meter, a positioning assembly and an aluminum plate, the lower end of the aluminum plate is fixedly connected with two mounting plates, a main shaft is rotatably connected between the two mounting plates, one end of the main shaft is fixedly provided with a bracket, and the main shaft is provided with a horizontal adjusting mechanism for adjusting the horizontal angle of the bracket. One end of the support is rotationally connected with a shell, a pitching adjusting motor is installed in the shell, the radar wave current meter and the positioning assembly are installed in the shell, and the aluminum plate is provided with a plurality of fixing assemblies used for being connected with a cableway. According to the utility model, the horizontal angle and the pitching angle of the radar wave flow velocity meter can be adjusted in real time according to the change of the water level, so that the radar wave beam and a lead fish monitoring point can be positioned on the same vertical line, the water flow velocities at different water depths are compared, and the monitoring precision of the water flow velocity is improved.

The invention relates to the technical field of ocean current monitoring, and discloses an ocean current meter data quality control method and system based on adaptive filtering. Comprising the following steps: acquiring original data containing ocean current direction and velocity, decomposing the original data into east-direction and north-direction velocity components, performing Fourier transform to obtain spectrum distribution, determining a dynamic filtering window by using an adaptive filtering algorithm, preprocessing the components, and extracting feature vectors to inversely calculate the flow direction; selecting Kalman filtering smooth component back calculation or directly obtaining corrected flow direction data according to whether the change amplitude of the feature vector exceeds a threshold value or not; extracting a dynamic trend from the correction data by using a principal component analysis method to obtain a principal direction feature set; on the basis, analyzing tide and terrain influences, and obtaining an environment influence weight; filtering parameter updating frequency is adjusted through weights, and high-precision ocean current direction data are output through secondary filtering back calculation of the real-time components. The method can improve the data quality control precision of the current meter and improve the monitoring accuracy.

The utility model belongs to the technical field of radar flow velocimeters, and especially relates to a radar flow velocimeter installation support comprising an installation support, one side of the installation support is provided with a first installation hole, one side of the installation support is provided with a plurality of first long strip-shaped installation grooves, and the first long strip-shaped installation grooves are provided with second installation holes. The multiple first long-strip-shaped mounting grooves are in the shape of a Chinese character'mi 'on one side of the mounting support with the first mounting hole as the center. The adjusting support is arranged on one side of the mounting support, a second mounting hole is formed in one side of the adjusting support, a plurality of second long-strip-shaped mounting grooves are formed in one side of the adjusting support, and after the two fixing screws connected with the two sliding grooves in a sliding mode are loosened, the second long-strip-shaped mounting grooves are formed in one side of the adjusting support. The fixing support can be rotated to adjust the angle of the radar flow velocity instrument body on one side of the fixing support, so that the radar flow velocity instrument body is adjusted to a more favorable measuring position, and the radar flow velocity instrument has the advantages of high adjustability and practicability.

This utility model relates to a water surface velocity monitoring device installed on a navigation beacon, comprising a first laser current meter, a second laser current meter, a voltage subtractor, an absolute value module, a Schmitt trigger, an electronic control switch module, and an audible and visual alarm module. The output terminal of the first laser current meter is connected to the inverting input terminal of the voltage subtractor, the output terminal of the second laser current meter is connected to the non-inverting input terminal of the voltage subtractor, the output terminal of the voltage subtractor is connected to the input terminal of the absolute value module, the output terminal of the absolute value module is connected to the input terminal of the Schmitt trigger, the output terminal of the Schmitt trigger is connected to the controlled terminal of the electronic control switch module, one end of the electronic control switch module is connected to a power supply voltage, the other end of the electronic control switch module is connected to the positive terminal of the audible and visual alarm module, and the negative terminal of the audible and visual alarm module is grounded. This utility model allows personnel to intuitively determine whether the water flow velocity collected by the laser current meter is accurate.

The present invention discloses an inshore dual-anchor current measurement buoy system, which includes two auxiliary buoys and a main buoy. The two auxiliary buoys and the main buoy are arranged in a straight line, with the main buoy located between the two auxiliary buoys. One of the auxiliary buoys is distributed near the open sea side, and the other auxiliary buoy is distributed near the shore side. The two sides of the main buoy are respectively connected to the two auxiliary buoys through horizontal chains, and the two auxiliary buoys are connected with a main anchor system, and the main anchor system is distributed towards the side away from the main buoy. The main buoy is provided with a data acquisition and control module. A hanging rack and a counterweight block are connected to the lower part of the main buoy through a suspension cable. The counterweight block is located below the hanging rack, and a Doppler single-point current meter and an acoustic Doppler current profiler, which are respectively connected to the data acquisition and control module, are arranged on the hanging rack. The present invention uses a dual-buoy mooring system for traction and fixation, avoiding the influence on observation due to excessive inclination, not being affected by water bubbles, being safe and reliable, having high-quality observation data, and being convenient for offshore deployment and recovery.