74 results about "Ultrasonic doppler" patented technology

The invention provides an underwater ultrasonic Doppler real-time analysis method and device based on a digital transducer, and relates to the technical field of data analys.The method comprises the steps that 1, multiple beams of directional ultrasonic waves are emitted into drilling fluid through a digital transducer array on the outer wall of a marine riser, echo signals reflected by gas-liquid two-phase flow are received, and the digital transducer array is used for receiving the echo signals; performing real-time digital conversion on the echo signal to generate an original digital signal containing phase and amplitude information; 2, Doppler frequency shift feature extraction is conducted on the original digital signals, and the real-time movement speed and direction of bubbles in the drilling fluid are determined by calculating the frequency deviation of reflected ultrasonic waves and transmitted ultrasonic waves. Through the digital transducer array and the ultrasonic Doppler technology, accurate measurement of motion parameters of bubbles in drilling fluid, real-time calculation of local gas content and early warning and grading response of gas cut are achieved, and the safety and the intelligent level of drilling operation are improved.

The invention belongs to the technical field of ultrasonic Doppler blood flow imaging, and particularly relates to a three-dimensional ultrasonic vector Doppler imaging method based on a row-column addressing array. According to the method, three-dimensional ultrasonic vector Doppler imaging is realized by combining a high-frame-rate two-dimensional non-focused wave emission sequence and a row-column addressing array (RCA) of a least square multi-angle Doppler velocity estimator; the method specifically comprises the following steps: acquiring radio frequency data from each oblique non-focused wave emission, and then performing IQ demodulation, beam forming and clutter filtering; performing high-frame-rate multi-angle vector Doppler analysis and speed estimation on a result through RCA; and dual-wavelength anti-aliasing processing is carried out. According to the invention, the imaging speed of more than thousands of frames can be realized, the sensitivity to low-speed flow and the measurement accuracy to high-speed flow are obviously improved, and clinical environment experimental verification is carried out; the method is suitable for clinical application, especially for blood flow dynamic monitoring of large blood vessels, and important support can be provided for blood flow dynamic research and clinical diagnosis.

The invention provides a method and a system for accurately regulating and controlling waste gas denitration air quantity of a glass melting furnace. According to the method, an ultrasonic Doppler sensor group is arranged around a glass melting furnace flue, ultrasonic beams are synchronously emitted to collect flow velocity pulsation data required by exhaust gas denitration air volume, time sequence waveforms are decomposed to generate multi-dimensional frequency characteristics, and the multi-dimensional frequency characteristics are aggregated into a multi-dimensional flow velocity vector representing a flow field state; vector deviation is synchronously corrected through space coordinate alignment and a time sequence, and difference variable quantity is extracted and fused to generate a flow field thermodynamic diagram; establishing a time-space correlation model of the multi-dimensional flow velocity vector and the thermodynamic diagram, predicting an air volume adjusting threshold value meeting the denitration requirement, and converting the air volume adjusting threshold value into a fan rotating speed control signal to drive an execution mechanism; and according to waste gas pulsation response data caused by fan rotating speed change and thermodynamic diagram updating frequency relevance, multi-dimensional flow velocity vectors are dynamically adjusted to form closed-loop regulation and control. According to the application, the dynamic demand of the denitration air volume and the millisecond-level closed-loop response executed by the fan are realized, the flue gas purification efficiency is improved, and the energy consumption is reduced.

The invention provides a low-power-consumption cooperative sewer water body integrated monitoring method. The method comprises the following steps: carrying out model selection and deployment on sensing node hardware of an adaptive scene; a low-power-consumption internet of things network topology and power supply design; a time-sharing triggering acquisition strategy of the multi-modal data is carried out; node-level environment self-adaptive data calibration is carried out; node-level flow velocity-stink association anomaly recognition is carried out; carrying out network-level data fusion and validity verification; collaborative traceability, diffusion simulation and linkage control are carried out. According to the invention, the problems of data distortion, difficulty in source tracing of pollution sources, short equipment endurance and response lag caused by independent collection of flow and stink and environmental interference in traditional sewer monitoring are solved; the integrated effect of ultrasonic Doppler and electronic nose cooperative monitoring, environment self-adaption accurate calibration, odor source rapid positioning and diffusion simulation and low-power-consumption and long-endurance linkage control is achieved.

The invention is suitable for the field of medical post-operation management and control, and provides a post-paracentesis monitoring method, device and equipment and a storage medium, and the method comprises the steps: monitoring the affected part information of a patient after paracentesis based on a plurality of sensors; the affected part information comprises ultrasonic Doppler imaging information of a target organ area, pressure change information of a puncture part and the periphery, temperature distribution and temperature change information of the puncture part, and sound wave propagation change information of the puncture part and surrounding tissues; based on the affected part information, determining bleeding information of the puncture part; and when the bleeding information indicates that the bleeding condition exceeds the preset safety range, triggering an alarm. According to the scheme, the bleeding symptoms can be early recognized, and automatic monitoring and adjustment are achieved.

The invention provides an oil-gas-water three-phase slug flow measurement method based on pulse wave ultrasonic Doppler, which comprises the following steps of: obliquely mounting a pulse wave ultrasonic Doppler sensor at the bottom of a pipeline, and ensuring that an included angle between a sound wave and a fluid flowing direction is theta; based on the pulse echo intensity principle and the Doppler principle, echo intensity profile data reflecting phase interface distribution characteristics and flow velocity profile data reflecting flow field distribution characteristics are synchronously obtained through the pulse wave ultrasonic Doppler sensor; according to the dynamic response of the test data to the flow process, establishing a signal processing algorithm to realize unit structure division of the slug flow, and further extracting related information of proportions of different areas of the slug flow, liquid film thickness and flow velocity of a gas bomb area, gas content of the gas bomb area and flow velocity of a liquid bomb area; finally, various kinds of information are fused through a physical model, and measurement of the total volume flow is achieved.

The invention relates to the technical field of fluid dynamics experimental measurement, and discloses a water tank experimental device and method for muddy current transportation of micro-plastics, the device comprises a water tank device main body, an optical measurement subsystem and an ultrasonic Doppler flow velocity measurement system, an ultrasonic emission path and an optical measurement window are overlapped in space, and the optical measurement subsystem and the ultrasonic Doppler flow velocity measurement system are arranged in the water tank device main body. The method comprises the following steps: performing first fluorescence labeling and second fluorescence labeling on the micro-plastic particles and the sediment particles; synchronously acquiring optical data and acoustic data in the cross window; respectively establishing a concentration correction function and a flow velocity correction function by taking acoustic backscattering intensity data and flow velocity data as references in the cross window; applying the correction function to the whole optical window to obtain a globally corrected concentration field and a globally corrected flow velocity field; and distinguishing and quantifying the micro-plastics and the sediments based on the corrected data. Through the cross correction principle, the problem of signal distortion of optical measurement in high-turbidity fluid is solved.

The invention, which relates to the technical field of medical data processing, discloses a nasal allergy prevention and management system comprising a data acquisition module, a data analysis module, an allergy prediction module and a terminal management module. The data acquisition module is used for acquiring a personal data set, a nose ultrasonic Doppler image and a nose near-infrared image of a tester; the data analysis module is used for performing quantitative coding processing on the personal data set of the testee, and performing feature extraction on the nose ultrasonic Doppler image and the nose near-infrared image through a first convolutional neural network path and a second convolutional neural network path respectively; the allergy prediction module is used for performing three-phase feature fusion on the personal data feature vector, the ultrasonic Doppler output feature map and the near-infrared output feature map to obtain output fusion features, and performing prediction classification on the output fusion features to obtain a nose allergy prevention result; and the terminal management module is used for providing a display interface for a user, receiving a user operation instruction, establishing a personal file of a tester and storing data.

The invention provides a flexible ultrasonic Doppler patch, and relates to the field of wearable health monitoring equipment. The flexible ultrasonic transducer comprises a flexible substrate layer, an electrode layer and a plurality of ultrasonic transducers, the electrode layer and the ultrasonic transducer are packaged by the flexible substrate layer; the flexible substrate layer comprises two slopes of which the slope tops are connected; the ultrasonic transducer is divided into two ultrasonic working groups, each ultrasonic working group further comprises a vertical connecting unit used for the signal electrode layer and the grounding electrode layer, and the two ultrasonic working groups are arranged on the two slopes respectively. The device can be directly attached to the surface of the human body in a non-pressure mode, it is ensured that an ultrasonic beam can be incident to a subcutaneous target blood vessel at the optimal incidence angle, a high-precision and low-cost solution is provided for wearable Doppler ultrasonic equipment, and the daily preliminary screening and prevention capacity of cardiovascular diseases is enhanced.

The invention discloses an electromagnetic flowmeter flow prediction method based on magnetic sensor identification analysis, and relates to the technical field of electromagnetic flow measurement, and the method comprises the steps: collecting a magnetic field intensity signal in real time, modulating an excitation coil based on a high-frequency pulse to generate an alternating magnetic field, and outputting an original magnetic field signal matrix containing space-time information; the flow velocity field predicted value and the attention weight vector are jointly optimized through a gradient propagation algorithm to minimize the mean square error of the predicted flow velocity and the ultrasonic Doppler reference value, and a calibrated flow value is output; and calculating a real-time confidence score based on the calibrated flow value, and when the score is lower than a preset threshold, performing online fine tuning on the attention weight vector by using an elastic weight consolidation algorithm, and outputting an anti-interference flow prediction result. The differential Maxwell equation constraint is embedded, the flow velocity field and the material parameters are optimized in a combined mode, and dual verification of the measurement result of the electromagnetic flowmeter on the aspects of data precision and physical rules is achieved.

The present invention relates to a liquid-solid two-phase flow measurement method of acoustic-electric dual-mode sensor fusion, which is used to realize non-disturbance measurement of liquid-solid two-phase flow in a horizontal measurement pipeline. The sensors adopted include a dual-section resistance tomography sensor and a pulse wave ultrasonic Doppler sensor. The dual-section resistance tomography sensor is used to obtain the distribution of liquid-solid two-phase media in the pipeline and the flow velocity measurement of the bottom particle layer. The pulse wave ultrasonic Doppler sensor is used to obtain discrete phase flow velocity profile information. The flow velocity profile information measured under different flow states is converted into liquid-solid two-phase flow through interpolation-type integration.

The invention relates to an open channel clogging real-time diagnosis system and method based on voiceprint and flow velocity fusion, and the method comprises the steps: a plurality of monitoring nodes are arranged along an open channel, the monitoring nodes are arranged at intervals according to the length of the channel, the terrain and the conditions of easy-to-deposit sections, and each monitoring node at least comprises an underwater sound sensor installed underwater on the side wall of the channel, the ultrasonic Doppler flow velocity sensor is installed at the position about 0.3 m underwater on the side wall of the channel, and the pressure type water level gauge is installed at the bottom of the channel and used for measuring the water level. According to the invention, various sensors are used for continuously monitoring the operation state of the open channel for 7 * 24 hours, and a multi-source information fusion acquisition mode is adopted, so that abnormal signals can be detected at the initial stage of clogging, intelligent diagnosis can be carried out, the clogging position can be positioned, early warning can be given out, and the inspection is more timely than manual inspection. And timely early warning and rapid positioning are helpful for the management department to take measures as soon as possible, so that small problems are prevented from being evolved into large dangerous cases, and safe operation of the channel is guaranteed.

The invention relates to a sudden cardiac arrest treatment device based on an ultrasonic Doppler feedback technology, and belongs to the field of medical instruments. The cardiac arrest treatment device based on the ultrasonic Doppler feedback technology comprises a first monitoring module used for monitoring the blood flow condition of the neck blood vessel of a target organism; and / or the second monitoring module is used for monitoring the blood oxygen condition of the neck blood vessel of the target organism; the acquisition module is used for acquiring blood supply and / or oxygen supply of the target organism according to the blood flow condition and the blood oxygen condition; the system comprises a blood supply module, a cardio-pulmonary resuscitation pressing module, and / or a ventilation module, and / or a defibrillation module, and the cardio-pulmonary resuscitation pressing module is used for adjusting the pressing depth or pressing frequency according to blood supply and / or oxygen supply; the ventilation module is used for adjusting the ventilation frequency in the cardio-pulmonary resuscitation pressing process according to blood supply and / or oxygen supply; the defibrillation module is used for executing defibrillation operation under the condition that the defibrillable heart rhythm exists. According to the technical scheme, the treatment rate can be increased, and the cardiac arrest treatment quality can be improved.

1. The name of the design product: the connecting seat of the probe cover of the ultrasonic Doppler probe. 2. The use of the design product: the overall use is to protect the probe of the ultrasonic Doppler probe from inserting into the rectal lesion during rectal surgery; the local use is to connect the probe cover of the ultrasonic Doppler probe to the main machine of the ultrasonic Doppler probe. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1. 5. Other circumstances that need to be explained: the dashed area does not belong to the appearance design content claimed.

1. Name of the design product: Ultrasonic Doppler Fetal Heart Rate Monitor (FD-268 series). 2. Use of the design product: For detecting fetal heart rate and listening to fetal heart sounds. 3. Design key points of the design product: Lies in the shape. 4. Picture or photo that best shows the design key points: Perspective view.

The present invention discloses a method for ultrasonic Doppler imaging of large targets, including: Step 1, dividing the target into multiple segments according to the length of the large target; Step 2, using a camera to record the position change of the ultrasonic imaging probe and using a slide rail to track the movement of the probe; Step 3, transforming all the collected images into the same coordinate system according to the position relationship between adjacent segments; Step 4, recording the position relationship between each frame of image and the camera when collecting the ultrasonic Doppler image of each segment; Step 5, mapping the collected images into a three-dimensional space through coordinate transformation to perform three-dimensional ultrasonic Doppler imaging. The present invention utilizes a convenient and low-cost optical positioning three-dimensional ultrasonic Doppler imaging system to realize a method for ultrasonic Doppler imaging of large targets, and solves the problem of limited imaging range of the camera in general optical positioning systems.

The invention relates to the technical field of medical instruments, in particular to a visual rectal hemorrhoid artery ligation suspension ultrasonic Doppler detection device which comprises an ultrasonic detection device and an operation display screen fixedly connected to the top end of the ultrasonic detection device, and a groove formed in the middle of the top end of the ultrasonic detection device is formed in one side of the operation display screen. According to the ultrasonic detection device, through the arrangement of the groove, the insertion cylinder, the blocking groove, the baffle and the ultrasonic probe, when the device is used, a doctor holds the ultrasonic detection device by hand to insert the insertion cylinder into the body of a patient, and the ultrasonic probe is inserted into the blocking groove; a doctor can rotate the ultrasonic detection device by operating the display screen to display conditions, so that the position of the baffle is aligned with the position of the rectum nevus artery, the baffle is pulled out in the next step, the doctor can insert a tool into the inner side of the groove to ligature and suspend the rectum nevus artery at the blocking groove, and the design of the groove and the blocking groove enables observation and operation of the doctor to be more convenient. And the operation efficiency is improved.

The invention discloses a multifunctional detection device for cerebral apoplexy screening, which comprises a main body, an opening and closing door, a lifting rod and an ultrasonic probe, the front end of the main body is rotatably provided with the opening and closing door, the right side of the main body is fixedly provided with the lifting rod, and an ultrasonic Doppler blood flow detector is placed in the middle of the interior of the main body. An electronic sphygmomanometer and a blood glucose tester are arranged at the left end and the right end in the main body respectively, and a weighing machine is arranged in the upper end of the main body. According to the multifunctional detection device for cerebral apoplexy screening, the blood flow speed in the body of a patient can be detected through the ultrasonic Doppler blood flow detector, then the blood glucose of the patient is detected through the blood glucose tester, the detection result can be transmitted to the interior of the ultrasonic Doppler blood flow detector, and self-evaluation of high-risk factors is completed; the detection content of specific markers in the body of a patient is detected through the medical consumables, and the use convenience of the device is improved through mutual cooperation of the devices.

The application discloses a mass flow calibration method and system, comprising: connecting a Coriolis mass flow meter to a calibration bench pipeline, and installing an intelligent sensor containing an ultrasonic Doppler array on the upstream side in the axial direction; starting a liquid supply pump to pump calibration fluid, controlling the ultrasonic Doppler array to perform cross-section scanning on the fluid to obtain dynamic flow profile time series data; inputting the dynamic flow profile time series data into a pre-trained fluid relaxation state prediction machine learning model, outputting a steady state arrival time point from the fluid relaxation state prediction machine learning model; triggering a calibration sampling instruction at the steady state arrival time point, obtaining a sampling mass flow value and comparing it with a reference standard flow value to complete calibration. The application solves the problem of systematic error in calibration sampling caused by non-steady state changes in flow pattern during the shear thinning recovery period of high viscosity fluid.

The invention relates to the technical field of petroleum drilling safety monitoring, in particular to an ultrasonic Doppler gas cut monitoring and evaluating method and a simple simulation experiment system. Comprising the following steps: S1, signal acquisition and gas content calibration; s2, performing interval division; s3, performing interval statistics; s4, establishing a quantitative mapping model; and S5, performing real-time monitoring and model optimization. According to the method, the random interference can be effectively suppressed, the focus point is transferred to the overall trend of a data set from a discrete single data point through interval division-statistical analysis, the adverse effects caused by bubble random motion and measurement noise are remarkably reduced, and the core problem of large discreteness of frequency shift signals is solved; quantitative monitoring can be realized, a quantitative evaluation relation model between Doppler frequency shift and gas content is successfully established, and the crossing from qualitative identification to quantitative evaluation is realized; the overall trend is extracted through the statistical thought, the anti-interference capacity is high, rapid online detection and evaluation of the gas content can be achieved, and technical support is provided for early warning of gas cut.

The present application discloses an ultrasonic Doppler imaging method, comprising extracting features from an acquired raw blood flow image to obtain vascular features; determining illumination processing parameters for each vascular location based on the vascular features; adjusting the original illumination model using the illumination processing parameters to obtain an illumination model; processing the corresponding vascular locations using the illumination model to obtain reflection results; and fusing each reflection result with a pseudo-color blood flow image corresponding to the raw blood flow image to generate an ultrasonic Doppler image. The ultrasonic Doppler imaging method can effectively reduce the dependence of different blood flow feature processing on illumination model parameters, thereby improving the ultrasonic Doppler blood flow imaging effect. The present application also discloses an ultrasonic Doppler imaging device, apparatus, and computer-readable storage medium, all of which have the aforementioned beneficial effects.

The invention belongs to the technical field of blood flow detection, and particularly relates to a detection analysis method and system of an ultrasonic Doppler blood flow detector. A pressure sensor and a coupling agent detection terminal are arranged on an ultrasonic probe, so that the contact pressure between the probe and the skin and the thickness of a coupling agent can be collected in real time in the blood flow detection process; meanwhile, image quality parameters are extracted from the blood flow ultrasonic image, the contact pressure of the probe and the use amount of the coupling agent are dynamically adjusted according to the parameters, fine control over the blood flow detection process is achieved, and the stability and high quality of the ultrasonic image are ensured; in addition, the effective blood flow velocity is extracted from the blood flow ultrasonic image on the basis of accurately controlling the contact pressure of the probe and the thickness of the coupling agent and is combined with the physiological indexes to identify the abnormal blood flow velocity, so that the quality of the ultrasonic image is guaranteed, the accuracy of the blood flow detection result can be further evaluated, and the accuracy of the blood flow detection result is improved. And abnormal conditions can be found and identified in time.

1. The name of the design product: the main machine of ultrasonic Doppler detector. 2. The use of the design product: for holding and operating in the operation of rectal diseases. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The invention relates to the technical field of lower limb venous thrombosis prevention, in particular to a lower limb venous thrombosis prevention system based on Doppler ultrasonic blood flow detection feedback, which comprises an upper computer, a single chip microcomputer system control device, an inflation and deflation device, a flexible ultrasonic blood flow velocity detection sensor and a lower limb venous thrombosis prevention device, the upper computer is used for acquiring the blood flow velocity and sending a control instruction to the single chip microcomputer system control device; the single-chip microcomputer system control device is used for controlling the flexible ultrasonic blood flow velocity detection sensor and the inflation and deflation device to work and can collect ultrasonic Doppler echo signals. The lower limb venous thrombosis prevention device is used for preventing thrombosis; the flexible ultrasonic blood flow velocity detection sensor is used for generating ultrasonic signals and receiving Doppler echo signals of the ultrasonic signals. The blood flow velocity can be accurately calculated, the flexible and portable lower limb venous thrombosis prevention device is used for preventing thrombosis and monitoring the treatment effect in real time, and the lower limb venous thrombosis prevention device is easy to operate and convenient to use.

The application provides a marine engineering water surveying device with positioning function, and relates to the field of water surveying.The marine engineering water surveying device with positioning function comprises a ship body, the inside of the ship body is fixedly connected with a supporting pipe, and the inside of the supporting pipe is provided with a lithium battery.The marine engineering water surveying device with positioning function is composed of a surveying device formed by cooperation of a transmitting transducer, a receiving transducer, an ultrasonic Doppler flowmeter, a tide gauge, a forward and reverse motor, a rotating plate, a temperature sensor, a pressure sensor and a main machine, basic hydrological information of the sea bottom, the shallow layer and the sea surface is collected, the marine hydrological information is collected and surveyed in a three-dimensional surveying mode, and the information collection is ensured to be effective.The GPS positioning device installed on the supporting rod regularly sends positioning information to the main machine and the shore, the position of the staff is ensured to be known by the staff on the shore, and the safety of the staff in the ship body is ensured.

The embodiment of the present application provides a method for adjusting the velocity measurement range of an ultrasonic device and the ultrasonic device. The velocity measurement range of the ultrasonic device is improved. The technical method provided by the embodiment of the present application comprises the following steps: obtaining a first velocity measurement range corresponding to a first imaging parameter, wherein the first velocity measurement range is a maximum velocity measurement range corresponding to the first imaging parameter; when the maximum velocity of the adjusted velocity measurement range is greater than the maximum velocity of the first velocity measurement range, adjusting the first imaging parameter to a second imaging parameter to obtain a second velocity measurement range corresponding to the second imaging parameter; wherein the maximum velocity of the second velocity measurement range is greater than the maximum velocity of the first velocity measurement range.

The invention relates to the technical field of ultrasonic sphygmomanometers, and discloses an ultrasonic sphygmomanometer which comprises a base, a host module and a detection module, the host module and the detection module are assembled on the upper end face of the base, an inner cavity of the detection module is slidably connected with a sealing mechanism, and the back face of the sealing mechanism is sleeved with a storage mechanism; the storage mechanism is connected with the base, a handle is assembled on the front face of the closed arm, and an anti-skid sleeve is connected to the outer portion of the handle in a sleeving mode. According to the ultrasonic sphygmomanometer, the inner cavity of the detection module is supported through the sealing arm, the strength of the detection module is improved, the situation that the detection module is prone to damage and deformation when being impacted, the use effect of the detection module is reduced is avoided, the virus infection risk is prevented from being increased, and workers can conveniently maintain and overhaul the whole sealing mechanism; the overall using effect of the device is improved, and blood pressure data can be accurately obtained according to the blood flow speed and pressure sensor data obtained through the ultrasonic Doppler effect.

The utility model relates to a power supply device of an ultrasonic Doppler diagnostic apparatus with a protection structure, which comprises a protection cover, a protection box, a first bounce-off plate, a second bounce-off plate, a rotating shaft and an L-shaped plate, and the protection cover is provided with a plurality of insertion holes at equal intervals; the first bouncing plate and the second bouncing plate are movably connected to the upper portion and the lower portion of the inner side of the insertion hole through L-shaped plates correspondingly, an included angle is formed in the connecting position of the upper L-shaped plate and the first bouncing plate, an included angle is also formed in the connecting position of the lower L-shaped plate and the second bouncing plate, and connecting pieces are arranged at the included angles of the connecting positions. The connecting pieces are connecting rods, each connecting piece is provided with at least one springback piece, the springback pieces are torsional springs, one sides of the springback pieces abut against the corresponding sides of the first bounce-off plate and the second bounce-off plate respectively, and the other sides of the springback pieces abut against the upper L-shaped plate and the lower L-shaped plate respectively. Therefore, the first bouncing plate and the second bouncing plate are restored to the original positions through the springback piece after being bounced off.

The present invention belongs to the technical field of ultrasonic Doppler blood flow imaging, specifically a three-dimensional ultrasonic vector Doppler imaging method based on a row-column addressing array. The present invention combines a high-frame-rate two-dimensional non-focused wave transmission sequence and a row-column addressing array (RCA) of a least square multi-angle Doppler velocity estimator to achieve three-dimensional ultrasonic vector Doppler imaging; specifically, it includes: acquiring radio frequency data from each tilted non-focused wave transmission, and then performing IQ demodulation, beamforming, and clutter filtering; performing high-frame-rate multi-angle vector Doppler analysis and velocity estimation on the results through RCA; and performing dual-wavelength anti-aliasing processing. The present invention can achieve an imaging speed of more than one thousand frames, significantly improve the sensitivity to low-speed flow and the measurement accuracy of high-speed flow, and has been verified by clinical environment experiments; it is suitable for clinical applications, especially in the dynamic monitoring of blood flow in large blood vessels, and can provide important support for hemodynamic research and clinical diagnosis.

1. Name of the product in this design: Ultrasonic Doppler Fetal Monitor (FS Series). 2. Purpose of this design: For continuous monitoring of fetal heart rate, fetal movement and maternal uterine contraction pressure during the perinatal period. 3. The key design features of this product are its overall shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.