66 results about "Doppler flow" patented technology

The invention discloses an acoustic Doppler flow velocity measurement method and system, and the method comprises the steps: generating an emission parameter combination adaptive to a current hydrological environment according to the depth characteristics and precision requirements of a target water area; original echo signals are collected based on the emission parameter combination, and a three-dimensional flow velocity vector of temperature compensation is output; inputting the three-dimensional flow velocity vector into the dynamic segmentation network to generate a layered flow velocity distribution model; calling a layered flow velocity distribution model, fusing fluxgate compass azimuth data to carry out flow direction compensation, triggering a deviation correction algorithm when equipment inclination exceeds a limit, and outputting absolute flow velocity distribution of pose calibration; and according to absolute flow velocity distribution and echo intensity dynamic range constraint, calculating an error interval of each depth unit, and outputting a final flow velocity profile with confidence identification. According to the embodiment of the invention, the environmental adaptability and data reliability of flow velocity measurement can be improved.

The invention provides a water body motion state recognition method and device based on spectral moment characteristics and a readable storage medium thereof, and belongs to the technical field of hydrographic survey and intelligent analysis. According to the method, an acoustic Doppler flow meter is used for collecting a flow velocity sequence, the flow velocity sequence is converted into frequency domain power spectral density through short-time Fourier transform, multi-dimensional features including zero-order to fourth-order spectral moments, frequency band energy, statistics and spectrum features are extracted, a feature time heat map is constructed and input into a multi-scale residual convolutional neural network, and the multi-scale residual convolutional neural network is obtained. And identification of laminar flow, turbulent flow and backflow is realized. The method accurately depicts essential differences of three types of flow states through frequency domain features, retains weak signals in combination with multi-scale convolution kernel and residual connection, solves the problems that a traditional method is poor in interpretability and insensitive in distinguishing, and has the advantages of being high in recognition accuracy, high in robustness and suitable for multiple scenes such as rivers and dams.

The invention provides a three-dimensional multi-dimensional oceanic nekton monitoring method based on artificial intelligence, and relates to the technical field of oceanic nekton monitoring, and the method comprises the steps: deploying a temperature-salinity-depth section plotter and an acoustic Doppler flow velocity section plotter, collecting data, configuring an environment parameter data set, obtaining a three-dimensional environment parameter data set, and obtaining a three-dimensional environment parameter data set; and a multi-dimensional environment parameter database is generated. Various ocean fishery resource investigation means are fused, an advanced artificial intelligence method is applied, three-dimensional multi-dimensional dynamic monitoring of the ocean swimming animals is achieved, on one hand, the number composition and space-time distribution of the ocean swimming animals, especially the vertical distribution characteristics can be monitored, the population dynamics of the ocean swimming animals and the relation between the population dynamics and environmental factors can be revealed, and on the other hand, the population dynamics of the ocean swimming animals can be monitored. By monitoring the swimming animals, basic data can be provided for population resource evaluation, and the method serves formulation of fishing quota of ocean economic swimming animals, delimitation of ocean protection areas and the like.

The invention particularly discloses a fractured rock mass grouting three-dimensional visualization test device and method, and relates to the technical field of rock mass engineering. The device comprises a test box body, a liquid inlet and outlet system, a monitoring system and a dynamic water environment simulation assembly, the test box body is made of a transparent acrylic material and is composed of an upper cover plate, a lower cover plate, a front cover plate, a rear cover plate, a baffle and two side cover plates, and a core experiment module is arranged in the test box body; the liquid inlet and outlet system is sequentially connected with the liquid holding device, the peristaltic pump, the valve, the Doppler flow velocity sensor and the test box body through rubber pipes; the monitoring system integrates an image collection unit and a data monitoring unit, an industrial-grade 3D camera and a binocular camera achieve visualization of the displacement process, and a fiber bragg grating pressure sensor synchronously collects fracture pressure data and transmits the fracture pressure data to a computer through a multifunctional data collection module. The device can be used for observing the displacement process of the slurry in the three-dimensional fracture in real time, synchronously monitoring key parameters, adapting to complex test working conditions and providing reliable support for grouting law research.

The invention relates to the technical field of water quality detection, and discloses a method and system for detecting the concentration of suspended solids in a canal water sample, and the method comprises the following steps: obtaining environmental parameters of a canal water body in real time, and synchronously collecting a light scattering intensity signal and an acoustic echo attenuation signal of the canal water body through a near-infrared optical sensor and an acoustic Doppler flow velocity profiler; calculating an initial suspended matter concentration value based on the light scattering intensity signal and the acoustic echo attenuation signal; correcting the initial suspended matter concentration value through a dynamic compensation algorithm according to the environmental parameters of the canal water body, and generating concentration data before calibration; inputting the concentration data before calibration into a pre-trained machine learning model, and outputting a final suspended matter concentration value; wherein the pre-trained machine learning model comprises a random forest regression model and a gradient boosting decision tree model. According to the scheme, the detection accuracy under the complex hydrological condition and the real-time response capability of the model under the disturbance scene can be improved.

The invention discloses a Doppler blood flow velocity estimation method based on high-frequency pulse differential frequency, and solves the problems of velocity estimation resolution reduction and artifacts caused by alternate transmission of a B mode and Doppler pulses in an ultrasonic dual-mode system. The method comprises the following steps: transmitting a high-frequency broadband ultrasonic signal compatible with B-mode imaging; the method comprises the following steps: receiving a superficial blood vessel echo signal, performing time domain sampling, converting into a discrete signal, extracting a narrow-band frequency spectrum through frequency sampling, and generating a low-frequency equivalent signal by using a multi-frequency-point differential frequency technology; calculating a covariance matrix of each signal, performing average weighting to remove artifacts, and generating low-frequency equivalent covariance data; and estimating the blood flow velocity through eigenvalue decomposition and spectral peak search. According to the method, two pulses do not need to be transmitted alternately, resolution reduction and artifacts are avoided, Doppler velocity estimation precision is remarkably improved, integrated waveform design is supported, and hardware implementation is simplified.

The invention discloses a method for measuring vascular elasticity modulus and blood pressure based on LC-OCT hyperelastic modeling, which comprises the following steps: accurately capturing dynamic deformation of blood vessels through high-resolution three-dimensional imaging and Doppler blood flow detection of LC-OCT, calculating the elasticity modulus (error is less than or equal to + / -5%) by combining a Fung model, and constructing a mixed blood pressure prediction model based on a theory-data dual-drive framework. High-precision inversion (MAE < = 5.1 mmHg) of systolic pressure, diastolic pressure and average arterial pressure is achieved, and dynamic transfer learning is adopted to adapt to the blood vessel characteristic differences of different crowds. The method has the advantages that blood vessel full-dimension characterization is achieved through multi-mode LC-OCT, dynamic transfer learning adapts to the difference of healthy / sick people, a theory-data dual-drive model gives consideration to physical interpretability and prediction precision, and a high-precision solution is provided for early diagnosis and personalized treatment of hypertension.

The invention belongs to the technical field of hydrodynamics, and relates to a subsurface flow accurate measurement method and system based on an acoustic Doppler flow velocity profiler. The method comprises the following steps: measuring a target water area by using an acoustic Doppler current profiler; extracting at least one boundary feature parameter at the measurement point; constructing a physical-data fusion model and carrying out pre-training; inputting effective flow velocity data located above the measurement blind area in the original data of the flow velocity profile and the boundary characteristic parameters into a pre-trained physical-data fusion model; and outputting the subsurface flow velocity distribution in the measurement blind area and the key statistic and confidence interval of the subsurface flow velocity distribution. According to the method, the respective defects of an existing physical model and an existing data driving model can be overcome, a subsurface flow accurate measurement method integrating physical interpretability and environment adaptability is provided, a traceable and verifiable model training and evaluation benchmark is provided, and the subsurface flow measurement accuracy in a complex environment is remarkably improved.

The invention relates to a blood flow parameter measuring device, equipment, a storage medium, an ultrasonic probe and a system, and belongs to the field of medical instruments. The blood flow parameter measuring device comprises a first obtaining module used for obtaining a first measuring parameter obtained by a first transducer group in an imaging mode; the second acquisition module is used for acquiring a second measurement parameter acquired by the second transducer group in the imaging mode or the Doppler blood flow detection mode; the first measurement parameter and the second measurement parameter both comprise a blood vessel position, a blood vessel depth, a blood vessel diameter and a Doppler included angle; the correction module is used for performing combined calculation on the first measurement parameter and the second measurement parameter and correcting the blood vessel diameter and the Doppler included angle; and the monitoring module is used for monitoring hemodynamic parameters of the target object according to the corrected blood vessel diameter and Doppler included angle. According to the technical scheme, the stable hemodynamics evaluation result can be output.

The utility model discloses an acoustic Doppler flow velocity measuring device which comprises a lifting support, a chain guide rail is arranged on the lifting support, and a chain used for pulling a measuring mechanism is arranged in the chain guide rail. The first lifting mechanism comprises a driving part which is provided with an output shaft, a winding drum is arranged on the output shaft, and a steel wire for pulling the measuring mechanism to lift is wound on the winding drum; the second lifting mechanism comprises an arc-shaped guide rail, an arc-shaped groove is formed in the guide rail, and the chain can extend into the guide rail from one end of the arc-shaped groove and extend out of the guide rail from the other end of the arc-shaped groove; and the chain wheel is fixedly connected to one end of the output shaft and is meshed with the chain. According to the utility model, the first lifting mechanism and the second lifting mechanism are arranged at the same time, and when one lifting mechanism breaks down, the other lifting mechanism can be used for driving, so that the phenomenon that the measuring mechanism cannot be pulled due to the damage of the lifting mechanism is avoided.

The utility model relates to the technical field of acoustic Doppler flow velocity profiler detection, and discloses an acoustic Doppler flow velocity profiler pressure sensor online detection device, which comprises a main frame, a pulley component and a cross beam component, the main frame is formed by welding square tubes, the two square tubes arranged in parallel at the bottom serve as supporting guide rails of the tackle component, the two vertical guide rails are symmetrically arranged on the two sides of the main frame, the cross beam component is arranged between the two vertical guide rails, and the main frame, the tackle component and the cross beam component are combined. The pressure sensor on-line detection equipment is low in cost, simple in operation and compatible with acoustic Doppler flow velocity profilers of various specifications, three notches are formed in the side portion of a vertical guide rail so that a cross beam component can have a high-middle-low fixing position, and three notches are formed in a guide column so that a clamping assembly can have a high-middle-low fixing position. And meanwhile, by virtue of the length of the screw rod, the device can be adapted to acoustic Doppler flow velocity profiler in three height ranges.

The invention provides a muscle-bone injury area identification method and system, and relates to the technical field of muscle-bone image injury identification. The method comprises the following steps: acquiring a two-dimensional gray-scale ultrasonic image of a target muscle-bone injury area, and positioning a synovial tissue area from the two-dimensional gray-scale ultrasonic image; extracting target feature information from the synovial tissue region; and determining the inflammation activity degree of the synovial tissue according to the target feature information. According to the method, Doppler blood flow signals are completely bypassed, the rheumatism inflammation activity degree is evaluated only through rich information contained in the two-dimensional gray-scale ultrasonic image, and therefore interference of probe pressure artifacts is thoroughly avoided.

The utility model discloses a Doppler flow meter device, and relates to the technical field of flow meters. Comprising a mounting support, a flow instrument probe is mounted on the mounting support, a Venturi jet device is mounted on the front side of the mounting support, a jet orifice of the Venturi jet device corresponds to the detection end of the flow instrument probe, a supporting rod is in threaded connection with the rear side of the mounting support, and the upper portion of the supporting rod is sleeved with a lower fixing plate; the lower fixing plate is in threaded connection with a hand-screwing bolt and is in fastening connection with the supporting rod through the hand-screwing bolt. According to the Doppler flow instrument device, the Venturi jet device is connected with the vortex fan, the high-pressure air source is connected, when the high-pressure air source enters the jet cavity from an inlet of the jet device to form high-speed jet fluid, dirt on the detection end of the probe is removed through impact, collision and friction of the high-speed jet fluid, the probe is easier and more convenient to clean, and the detection efficiency is improved. Manual checking and cleaning are not needed, and the accuracy of data measurement is improved.

The utility model relates to the technical field of submarine mining, in particular to a multi-vehicle collaborative deep-sea mining underwater positioning navigation system and a working method, which comprises wireless communication positioning equipment, a long baseline positioning assembly, an ultra-short baseline positioning assembly, a communication cable, an inertial navigation system and a Doppler flow velocity log, the long baseline positioning assembly comprises a long baseline positioning node, a long baseline positioning terminal and a long baseline resolving unit; the ultra-short baseline positioning assembly comprises an ultra-short baseline positioning array and an ultra-short baseline positioning terminal. The underwater comprehensive positioning and navigation system can be applied to underwater comprehensive positioning and navigation of a plurality of mining vehicles, conveying hoses, relay stations and conveying vertical pipes in a commercial mining system.

The invention relates to a system and method for performing a laser Doppler flowmetry, LDF, measurement. The system comprises a coherent light source, a photodetector and one or more processors. The photodetector generates an output signal. The processor(s) determines a selected frequency range for computing an LDF signal. A spectrum of the photodetector output signal is computed for a series of time intervals, thereby obtaining a series of spectra. A measure of the amount of physiological information in the spectra is computed for a number of different frequencies. The selected frequency range is determined as the range of frequencies for which the computed measure of amount of physiological information fulfills a predetermined criterion. The processor(s) compute an LDF signal using the selected frequency range, and output the LDF signal.

The invention discloses a wading bridge cast-in-place box beam intelligent dynamic support system and a construction method, and relates to the technical field of bridge engineering, the wading bridge cast-in-place box beam intelligent dynamic support system comprises a sensor array module which comprises a plurality of sensor nodes composed of Doppler current meters, pressure type water level gauges and optical fiber strain sensors, and the sensor nodes are arranged at different positions of a support respectively; the sensor is used for monitoring data of water flow speed, water level change and support stress in real time and transmitting the collected sensor data to a remote control center in real time in a wireless communication mode; by arranging the sensor array module, the self-adaptive buoyancy module, the upstream intelligent grid, the telescopic supporting mechanism and the remote control center, the intelligent dynamic support system capable of achieving real-time monitoring and dynamic adjustment is adopted, the effect of remarkably improving the stability of the support in wading bridge cast-in-place box girder construction is achieved, and the construction risk and cost are reduced; a prediction model based on an AI algorithm is introduced.

The utility model discloses a lifting support for an acoustic Doppler flow velocity measuring device, comprising a plurality of support units, each support unit comprising a plurality of longitudinal beams and a plurality of cross beams; the first connecting pieces are connected to the outer side faces of the cross beams, the outer side faces of the longitudinal beams and the outer side face of the other adjacent cross beam at the same time. The second connecting pieces are connected to the inner side faces of the cross beams and the inner side face of another adjacent cross beam at the same time; according to the utility model, the plurality of first connecting pieces are arranged on the outer side surfaces of the cross beams and the longitudinal beams, and the second connecting pieces are arranged on the inner side surfaces of the two adjacent cross beams, so that the plurality of longitudinal beams and the plurality of cross beams are detachably assembled together. In this way, the original scheme that the lifting support is welded on site is replaced, and the problem that welding cannot be achieved due to the fact that the construction site does not have the power supply condition is solved.

The invention relates to a system and method for performing a laser Doppler flowmetry, LDF, measurement. The system comprises a coherent light source, a photodetector and one or more processors. The photodetector generates an output signal. The processor(s) determines a selected frequency range for computing an LDF signal. A spectrum of the photodetector output signal is computed for a series of time intervals, thereby obtaining a series of spectra. A measure of the amount of physiological information in the spectra is computed for a number of different frequencies. The selected frequency range is determined as the range of frequencies for which the computed measure of amount of physiological information fulfills a predetermined criterion. The processor(s) compute an LDF signal using the selected frequency range, and output the LDF signal.

1. Name of the product in this design: Ultrasonic Transcranial Doppler Blood Flow Analyzer Headframe. 2. Purpose of this design: When used in conjunction with a transcranial Doppler ultrasound blood flow analyzer, it can simultaneously fix two probes for long-term intracranial vascular blood flow monitoring. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention discloses a marine environment monitoring system based on inertial navigation, and the system comprises an inertial navigation system which is used for collecting three-dimensional attitude angle and three-dimensional linear acceleration data; the Doppler log is used for collecting moving speed data of the carrier relative to the seabed; the satellite navigation receiver is used for collecting a geographic position and a UTC time signal; and the temperature-salinity-depth instrument is used for collecting temperature, salinity and pressure data of seawater. And the acoustic Doppler flow velocity profiler is used for collecting relative velocity and direction data of water flows at different depths in a water column below the carrier. The inherent accumulated position drift error of the inertial navigation system is corrected in real time by comparing and fusing the real-time position, speed and attitude angle of the carrier provided by the inertial navigation system with the ground speed of the carrier provided by the Doppler log. And the existing residual position error is reset to zero by using the absolute geographic position, so that the problem of precision maintenance during long-endurance and long-distance operation of the carrier is thoroughly solved.

A method for monitoring renal blood flow of a patient includes positioning an ultrasound transducer probe on an abdomen of the patient. The ultrasound transducer probe includes a two-dimensional array of transducer elements. The two-dimensional array of transducer elements and a beamformer driving the two-dimensional array of transducer elements scan a volume of the abdomen of the patient under the field of view of the two-dimensional array of transducer elements. A processor in communication with the ultrasound transducer probe and the beamformer identifies a sub-volume in the volume that includes a Doppler flow signal having a signature of interest corresponding to the renal blood flow of the patient. A set of sequential beams are periodically fired from the two-dimensional array of transducer elements over the sub-volume to track the sub-volume.

The utility model provides a sectional type seabed base suitable for coral island power environment monitoring, which belongs to the field of coral island sea area monitoring equipment and comprises a hollow cylinder and an inclined tube single-side support assembly, a universal ring is arranged at the center of the hollow cylinder, a hollow circular ring is arranged inside the bottom of the hollow cylinder, and the inclined tube single-side support assembly is connected with the universal ring. A plurality of cylindrical vertical rod guardrails are arranged at the lower end of the hollow circular ring, a cylindrical bottom support is arranged at the bottom ends of the cylindrical vertical rod guardrails, an acoustic Doppler flow velocity profiler is arranged on the universal ring, and a hollow disc is arranged on the outer wall of the hollow cylinder; the upper ends of the inclined tube single-side support assemblies are connected with the hollow disc through inclined tube upper steel plates, inclined tube bottom perforated round steel plates are arranged at the lower ends of the inclined tube single-side support assemblies, and the two inclined tube single-side support assemblies are respectively provided with a wave tide meter, a temperature-salinity-depth meter and a turbidity meter. The device is suitable for being laid on the coral reef shallow water coast through a small civil ship, the instrument and the seabed base are detachable, and the device is convenient to carry and deploy.

The present application belongs to the technical field of anatomical hemodynamic data processing, and relates to a VTE dynamic early warning method and system based on anatomical hemodynamic coupling; the present application synchronously collects ultrasonic structure images and Doppler blood flow signals, extracts time-varying vorticity features and key anatomical constraint sets, generates an expected blood flow atlas by using a fluid dynamics simulation model, compares in real time to monitor continuous deviation events, and traces back to analyze to generate root cause candidate points; the system further constructs a dynamic risk field and a dynamic root cause field, which are updated in correlation to form a dynamic coupling field, realizing continuous and individualized tracking of the health status of blood vessels; finally, according to the dynamic coupling field situation, graded early warning data containing early warning state levels, risk visualization and traceability prompts are output; the present application improves the timeliness and diagnosis direction of early warning, and provides precise and dynamic risk assessment and decision support for clinical use.

The invention belongs to the technical field of wind turbine generator auxiliary work, and discloses an offshore wind power single pile foundation cage vibration suppression device which comprises a flow breaking plate in an equilateral rectangle shape and flow disturbing assemblies installed at the four corners of the flow breaking plate correspondingly. Through the cooperation of the flow breaking plate, the flow disturbing assembly and other structures, when one acoustic Doppler flow velocity profiler detects that the impact force of the ocean current is too large, the outer end of the flow guide plate is controlled to face the ocean current through the intelligent adjusting assembly, and the ocean current is shunted by the shunting boxes and reaches the other two shunting boxes through the notches in the flow guide plate; the guide plates II are in fixed postures and are not in the same direction as the ocean current, and the ocean current is in a disordered state and is thoroughly disturbed, so that the situation that the flow velocity is not reduced and the ocean current converges with other ocean currents to form larger-scale ocean current or eddy current is prevented, the impact of the ocean current on other cage bodies is reduced, and the service life of the cage bodies is prolonged. And the safety of the cage in other areas is further protected.

The invention discloses a self-diversion type overwater emergency rescue floating platform, and relates to the technical field of overwater emergency rescue floating platforms, the self-diversion type overwater emergency rescue floating platform comprises an overwater emergency rescue floating platform body, the top end of the overwater emergency rescue floating platform body is provided with a rescue chamber, and the top of the rescue chamber is provided with a flexible solar film. The ultrasonic wave wind speed sensor is used for measuring real-time wind speed / wind direction, the Doppler flow speed sensor is used for measuring underwater water flow speed / flow direction, and the pressure type wave height sensor is used for measuring wave height / wave frequency, so that transverse wind wave monitoring is realized under cooperation, and then data is transmitted to the main controller for analysis; an electric telescopic rod in the deformation flow guide mechanism is driven to extrude an elastic deformation plate to be gradually bent into an arc shape from an initial parallel state (the radian is increased along with the increase of the wind wave grade) according to the wind wave grade, and a rubber buffer cushion is matched to resist wind wave impact and guide the impact to be shunted from the two sides of the floating platform, so that interference of wind waves to rescue operation is reduced; the standing stability of personnel is improved.

A blood flow monitor includes an ultrasound transducer probe with a two-dimensional array of transducer elements. An adhesive patch is connected to the ultrasound transducer probe and is configured to attach the ultrasound transducer probe to a patient. The blood flow monitor also includes a system memory that stores beamformer software code. A processor is in communication with the ultrasound transducer probe and the system memory. The processor is configured to execute the beamformer software code to steer a beam to scan the patient with the array of transducer elements to find a Doppler flow signal of a targeted blood flow of the patient.

The utility model discloses a lifting mechanism for an acoustic Doppler flow velocity measuring device, which comprises a driving part provided with an output shaft on which a winding drum is arranged; the winding drum comprises a first wire winding section and a second wire winding section, a first steel wire is wound on the first wire winding section, a second steel wire is connected to the second wire winding section, and the first steel wire and the second steel wire are both connected to the measuring mechanism; wherein the winding direction of the first steel wire is opposite to that of the second steel wire; the first steel wire is connected to the top end of the measuring mechanism and is used for applying upward pulling force to the measuring mechanism; the second steel wire is connected to the bottom end of the measuring mechanism and used for applying downward pulling force to the measuring mechanism. According to the utility model, the first wire winding section winds the first steel wire and pulls the measuring mechanism upwards to rise at a constant speed; and the second wire winding section winds the second steel wire and downwards pulls the measuring mechanism to descend at a constant speed, so that the measuring mechanism ascends and descends at a constant speed.

The application discloses a data processing method of an underwater glider for obtaining a sea current profile, and belongs to the technical field of ocean exploration. The underwater glider for obtaining the sea current profile comprises a pressure-resistant unit, a tail unit and a flow velocity profile obtaining unit. The flow velocity profile obtaining unit comprises an acoustic Doppler flow velocity profiler, a current meter and a temperature-salinity-depth sensor. The underwater glider can obtain the sea current information by integrating the flow velocity sensor, but the obtained sea current information is the relative velocity relative to the moving glider platform, and is not the absolute velocity of the sea current. The application obtains the accurate sea current profile based on the motion information of the underwater glider and the flow velocity profile observation data.

The utility model provides a shell plate type ship side hydrographic survey equipment laying device which comprises a C-shaped framework and a lifting rod, the bottom of the C-shaped framework is connected with an installation frame, the left side and the right side of one side of the bottom of the C-shaped framework are respectively provided with a first locker, a fixing assembly is arranged on the surface of the installation frame, and the fixing assembly comprises a limiting hoop. One side of the limiting hoop is rotationally connected with a first limiting piece through a rotating shaft, a first locking nut is arranged on the surface of the limiting hoop and located on the side opposite to the first limiting piece, and the limiting assembly is arranged on one side of the surface of the C-shaped framework. According to the shell plate type ship board hydrographic survey equipment laying device provided by the utility model, the fixing assembly is arranged on the C-shaped framework with the mounting frame, and the through groove and the limiting assembly are matched for operation, so that an underway acoustic Doppler flow velocity profiler can be fixed on a shell plate type ship board in an auxiliary manner; therefore, the existing manual taking work and hoop fixing mode of workers can be replaced, and the operation safety can be improved.

The present invention relates to the technical field of drainage network flow measurement, and discloses a Doppler flow measurement method for drainage network coupled with multiple physical fields. The method comprises: obtaining fluid flow data of the drainage network, performing Doppler frequency shift analysis on the fluid flow data of the drainage network to obtain data analysis results, and establishing a multi-physical field model based on the data analysis results. The multi-physical field model is obtained by coupling the acoustic field, the flow field, and the temperature field. Drainage network flow measurement is performed based on the multi-physical field model. The present invention achieves accurate flow measurement in a non-full pipe flow state through Doppler frequency shift analysis. At the same time, by comprehensively considering the coupling effects of multiple physical fields such as acoustics, fluid mechanics, and thermodynamics, a multi-physical field coupling analysis is performed to achieve high-precision measurement of fluid flow in the drainage network.