15 results about "Doppler flow" patented technology

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 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.

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 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.

This invention belongs to the field of blood flow detection technology, specifically relating to a detection and analysis method and system for an ultrasonic Doppler blood flow detector. By configuring a pressure sensor and a coupling agent detection terminal on the ultrasonic probe, the contact pressure between the probe and the skin and the coupling agent thickness can be collected in real time during blood flow detection. Simultaneously, image quality parameters are extracted from the blood flow ultrasonic images, and the contact pressure of the probe and the amount of coupling agent used are dynamically adjusted based on these parameters, achieving precise control of the blood flow detection process and ensuring the stability and high quality of the ultrasonic images. In addition, by precisely controlling the probe contact pressure and coupling agent thickness, the effective blood flow velocity is extracted from the blood flow ultrasonic images and combined with physiological indicators to identify abnormal blood flow velocities. This operation not only ensures the quality of the ultrasonic images but also allows for further accuracy evaluation of the blood flow detection results, enabling timely detection and identification of abnormalities.

The utility model discloses a take-up mechanism for an acoustic Doppler flow velocity measuring device. The take-up mechanism comprises a rotatable take-up roller; the guide roller is parallel to the take-up roller, a first guide groove and a second guide groove are formed in the guide roller, and the first guide groove and the second guide groove are spirally formed along the peripheral wall of the guide roller; and the guide sleeve is arranged on the guide roller in a sleeving mode and can rotate relative to the guide roller, balls are arranged on the inner circumferential wall of the guide sleeve, and the balls can slide along the first guide groove and the second guide groove. According to the cable winding device, the guide sleeve can drive the cable to move in the length direction of the guide roller, so that the cable is uniformly wound on the winding roller, the cable is prevented from being stacked at the same position of the winding roller, and the cable is prevented from being broken or broken due to overlarge stress.

The utility model discloses a flow velocity monitoring device for hydraulic engineering, which belongs to the field of hydraulic engineering and comprises a Doppler flow velocity meter composed of a remote controller and a single flow velocity sensor, and a plurality of hollow measuring rods connected through pin structures are arranged on one side of the single flow velocity sensor. Compared with the prior art, the utility model has the advantages that the device indirectly drives the single flow velocity sensor welded with the convex plate to automatically move up and down along the hollow measuring rod through the threaded structure connection of the screw rod and the convex plate, thereby completing the measurement of the flow velocity under the condition that the position of the hollow measuring rod is not changed. The water flow velocities at different depths are detected, so that remote monitoring of the water flow velocities at different depths is facilitated; in order to adapt to the convenience of assembly and carrying of the multi-section hollow measuring rod, the total screw rod is also formed by splicing a plurality of sections of screw rods.

This utility model discloses a flow metering device for pipe corridors, relating to the field of pipe corridor flow metering technology. It includes a fixed plate connected to the inner wall of the corridor, a fixed ring mounted on the fixed plate, and a Doppler flow meter positioned on the fixed ring. A transmission line is located at the rear end of the Doppler flow meter and connected to a processor. A quick-release mechanism is provided between the fixed ring and the fixed plate. The quick-release mechanism includes a fixed sleeve fixedly connected to the surface of the fixed ring. By pressing a button, the button drives the guide sleeve to move, which in turn drives the guide block to move through a guide groove. The guide block drives the sliding column to rotate, and the sliding column adjusts the locking block to unlock or lock, facilitating quick installation of the fixed ring. The button is embedded in the fixed sleeve, effectively reducing direct water erosion. The use of the locking block and fixed seat for easy fixing avoids structural damage caused by water erosion and extends service life.

This invention relates to the field of medical device technology and discloses a multi-dimensional biomimetic experimental device for whole-body vascular interventional shunt stents, comprising a mobile platform and a multi-dimensional detection matrix: a stent plate is fixedly connected to one side of the mobile platform, a stent rod is fixedly connected to the outside of the stent plate, a main trunk segment is provided inside the stent rod, and multiple lateral trunk segments are provided outside the main trunk segment; a reservoir, a peristaltic pump, and a pressure control valve are fixedly connected to the outside of the stent plate; a disassembly component one is provided at one end of the main trunk segment, and a disassembly component two is provided at one end of each lateral trunk segment or branch segment; the multi-dimensional detection matrix includes a miniature pressure sensor, an ultrasonic Doppler blood flow velocity measurement module, and a particle image velocity measurement system. Through the main trunk segment, lateral trunk segment, and branch segment, combined with the rapid sealing and snapping of modular disassembly components one and two, high-precision biomimetic simulation of the vascular bed in different parts of the human body is achieved.

The utility model discloses a deep sea subsurface buoy system suitable for fine observation of a bottom boundary layer, which comprises a seabed base, a plurality of single-point flow velocity observation units and a main floating body which are sequentially connected from bottom to top, the plurality of single-point flow velocity observation units are arranged between the seabed base and the main floating body along the tensile cable, and each single-point flow velocity observation unit is integrated with a deepwater single-point current meter and a CTD; an acoustic Doppler flow velocity profiler is installed in the main floating body, and the acoustic Doppler flow velocity profiler, an ADV, a CTD and a double-parallel acoustic releaser are integrated on the seabed base. According to the utility model, an observation blind area is eliminated through structure optimization, and a core area (5-10m) of a bottom boundary layer can be brought into an observation range; multiple observation units with vertical spacing can capture full-water-depth ocean current change details, and the data resolution is improved; due to the arrangement of the double parallel acoustic releasers, the equipment reliability is improved, and the risk of recovery failure is effectively reduced; and long-term continuous observation can be realized.

The invention provides a multi-vertical-line ADCP flow measuring system and method and a buoy assembly of the multi-vertical-line ADCP flow measuring system. The system comprises the buoy assembly, a multi-vertical-line ADCP sensor array and a control system. The buoy assembly is composed of a swim ring type floating body, a hollow bottom plate, a hollow column, a top plate, a hemispherical transparent cover, a fastener and a sealing ring, and is stable in structure and convenient to install and maintain. The multi-vertical-line ADCP sensor array comprises at least three acoustic Doppler flow velocity section meters which are arranged in an equilateral triangle mode, sound beams of the section meters point to different measuring vertical lines, and multi-point synchronous flow measurement is achieved. The control system integrates a data acquisition module, a control module and an energy storage management and communication module, is provided with a solar cell panel, and is fixed above the hemispherical transparent cover through an integrated bracket to realize green energy power supply. Therefore, three advantages of high measurement precision, high environmental adaptability and high intelligent degree of the system are realized, so that the equipment is suitable for a complex hydrological environment; remote monitoring is achieved through multiple wireless communication modes, and the intelligent water conservancy development requirement is met.

The invention provides a two-dimensional intelligent suppressing interference generation method based on double-flow deep learning, and the method comprises the steps: projecting input low-latitude noise to a high-latitude feature space, and providing initial feature representation for a subsequent processing flow; the method focuses on extraction and generation of local correlation and time sequence structure features related to distance dimension waveforms, and adopts causal convolution to ensure that waveform generation does not depend on future information and accords with physical realizability. Modeling a dynamic mode in which global time of Doppler dimension depends on state evolution and how interference energy should be distributed among a plurality of pulses; global information of Doppler flow is used to actively query and screen local waveform features in distance flow, and depth and adaptive coupling of two-dimensional information is realized; carrying out adaptive integration on original features from different paths and fused upper and lower features, and ensuring training stability and effective flow of information through residual connection; and respectively decoding distance dimension convolution noise and Doppler modulation vectors from the fusion features.

The utility model discloses a driving mechanism used for an acoustic Doppler flow velocity measuring device, comprising a driving member which is provided with an output shaft, and one end of the output shaft is provided with a chain wheel; the traction unit comprises a guide rail which is arranged in an arc shape, an arc-shaped groove is formed in the guide rail, and the arc-shaped groove penetrates through the two ends of the guide rail; a chain for pulling the measuring mechanism is arranged in the arc-shaped groove; a notch communicated with the arc-shaped groove is formed in the side wall of the guide rail, and at least part of the chain wheel can stretch into the notch to be meshed with the chain. According to the utility model, the notch is arranged on the guide rail, and the chain wheel extends into the notch and is meshed with the chain, so that power transmission is realized, the chain wheel does not need to bear the gravity of the chain and the measuring mechanism, the longitudinal stress of the chain wheel is smaller, and the service life is longer.

This application relates to a blood flow parameter measurement device, equipment, storage medium, ultrasound probe, and system, belonging to the field of medical devices. The blood flow parameter measurement device includes: a first acquisition module for acquiring first measurement parameters obtained by a first transducer group in imaging mode; a second acquisition module for acquiring second measurement parameters obtained by a second transducer group in imaging mode or Doppler blood flow detection mode; both the first and second measurement parameters include vessel location, vessel depth, vessel diameter, and Doppler angle; a correction module for combining and calculating the first and second measurement parameters to correct the vessel diameter and Doppler angle; and a monitoring module for monitoring the hemodynamic parameters of the target object based on the corrected vessel diameter and Doppler angle. The technical solution of this application can output stable hemodynamic evaluation results.