52 results about "Array transducer" patented technology

The invention provides an acoustic coalescence elimination method for hydrogen bubbles in molten aluminum, and belongs to the technical field of molten aluminum bubble elimination. According to the method, sound field collaborative focusing is achieved by arranging a phase control array transducer set in a molten aluminum smelting furnace, primary gathered sound waves and efficient coalescence sound waves are applied in stages according to bubble size evolution in a double-frequency scanning mode, and the hydrogen bubbles in the molten aluminum are eliminated. A target frequency is dynamically adjusted in combination with a bubble resonance frequency optimization model to match the inherent frequency of a bubble, a sound-bubble coupling dynamic tracking system is used for monitoring bubble evolution triggering stage switching in real time, and a sound field focus point dynamically scans and covers a three-dimensional space area through phase delay control. A delay detection method is adopted to eliminate cavitation bubble interference and accurately measure the hydrogen content, sound intensity and frequency parameters are optimized according to a sound field parameter self-adaptive regulation and control model, and the technical problem that hydrogen bubbles in a molten aluminum deep area are difficult to be effectively driven by sound waves and cannot be fully coalesced and eliminated is solved.

The present invention relates to an endoscopic probe for photoacoustic tomography of cavity side walls, characterized by comprising a hollow tubular probe housing with a closed front end; N acoustic wave receiving windows and M laser output windows formed on the side wall of the tubular probe housing; an array of linear laser output ports connected to a pluggable optical fiber connector via an optical fiber bundle; and an ultrasonic transducer array connected to a multi-channel signal connector via a signal harness. The present invention employs a method of arranging array transducers and array laser outputs on the side wall of the probe, eliminating the need for a reflector. The probe is less than 2 centimeters in size and can be placed in close proximity to the prostate through the rectum for photoacoustic imaging of the prostate, or in close proximity to the inner wall of the rectum for photoacoustic imaging of the inner wall of the rectum. The endoscopic probe provided by the present invention, combined with a photoacoustic imaging system host, utilizes photoacoustic endoscopic imaging technology to perform real-time transrectal prostate imaging and rectal imaging, achieving ideal imaging results.

The present invention discloses a wireless cross-domain acoustic communication system and method based on acoustic holography. The acoustic holographic device used for cross-domain acoustic communication consists of a single-layer acoustic holographic phase plate, an array transducer, and a camera vision module, wherein each array element of the array transducer has two states: on / off. After receiving the communication coding signal transmitted in the water, the transducer array elements at the corresponding positions can be sequentially selected and the dynamic regulation of the incident sound field can be realized. Then, the sound is transmitted to the water-air interface through the single-layer holographic phase plate and phase-modulated. Under the action of the acoustic radiation force, the interface will deform. The camera vision module is used to capture and parse and decode the deformation of the water surface, completing the wireless reception of information across the water-air interface. The present invention can directly transmit underwater information to the air. The equipment is simple and the relative position requirements of the transmitting and receiving devices are not strict. It is applicable to liquid environments of any temperature, salinity, and density.

Non-destructive inspection of welded rail joints by ultrasound phase-array transducers in one device, precise positioning non-destructive inspection probes and moving the probes in longitudinal and transverse directions. Two scanners have ultrasound phase-array transducers and emission control unit for sequential or simultaneous inspection of welded joints using (i) two ultrasound phase-array transducers are directed to each other and operate separately, wherein the transducers provide a beam sector of 36-75 degrees; (ii) two ultrasound phase-array transducers are directed to each other and operate separately, wherein the transducers provide a beam sector of 26-24 degrees from the tread surface during longitudinal movement; and / or (iii) two ultrasound phase-array transducers are directed to each other, one transducer emits a transverse wave with a predetermined angle from the tread surface to the base of the rail, while the other transducer receives a longitudinal wave that occurs only when a vertical crack exists in the rail.

This invention relates to an ultrasound endoscope probe, an ultrasound endoscope system, and its working method. The ultrasound endoscope probe includes multiple convex array transducers arranged in an array on a mounting plate. The mounting plate has a retracted position and an extended position. When the mounting plate is in the retracted position, the connecting surface is abutted against the mating inclined surface. When the mounting plate is in the extended position, the working surface is perpendicular to the central axis of the endoscope catheter. The ultrasound endoscope system includes a signal synchronization module, a data acquisition module, a data processing module, and a display module. By constructing a mapping relationship between the probe coordinate system and the BEV global coordinate system, a three-dimensional voxel mesh is generated to segment blood vessels and tumor tissue, ultimately achieving three-dimensional reconstruction. This invention overcomes the shortcomings of traditional ultrasound imaging, such as low vascular discrimination and large three-dimensional reconstruction errors, effectively improving imaging and segmentation accuracy, clearly displaying the relationship between lesions and adjacent blood vessels, shortening operation time, improving the safety of minimally invasive operations, reducing the burden of diagnosis and treatment for patients, and demonstrating significant clinical application value.

The invention relates to the technical field of ultrasonic phased array nondestructive testing, and discloses a metal pipe inner wall defect ultrasonic phased array detection probe and a metal pipe inner wall defect ultrasonic phased array detection method, the probe comprises an array transducer and a wedge block, the array transducer is connected with the wedge block through a connector, and the curvature radius of the end face of the bottom of the wedge block is the same as that of a metal pipe. The curvature of the end part of the probe provided by the invention is the same as that of the outer diameter of the pipe, so that good acoustic coupling can be realized, an oblique incidence sound beam forming a certain angle with the radial direction of a detected object can be formed, and ultrasonic waves can obliquely enter the side surface of a defect; the full-focus algorithm is adopted for imaging in the axial direction of the pipe, the detection sensitivity of inner wall shallow surface defects can be effectively improved, and the detection efficiency and reliability are improved.

A multi-array transducer for ultrasound guided intervention includes a transducer head, a housing unit, and a cable. The transducer head includes a plurality of arrays. A method for real-time visualization of needle insertion in biopsy includes: providing a multi-array transducer, the multi-array transducer including a plurality of arrays; and generating a plurality of ultrasound images by using the plurality of arrays for visualizing the insertion in real time.

The invention relates to a curved surface structure upper surface positioning method based on a non-uniform angle plane wave technology, and the method comprises the following steps: generating a plane wave emission angle sequence based on a non-uniform distribution function according to a maximum deflection angle and the total number of sampling angles; sequentially transmitting plane waves to the curved surface structure according to an angle sequence through an array transducer, and recording echo signals received by a full array element at each angle; performing envelope extraction on the received echo signal to obtain an envelope signal; performing imaging reconstruction on the envelope signal through a time domain delay superposition algorithm to obtain a composite imaging result; and extracting echo envelope intensity distribution according to a composite imaging result, reconstructing a space contour of the upper surface of the curved surface, and realizing positioning of the upper surface of the curved surface structure. Compared with the prior art, under the condition of limited angle number, the sound field contribution in the direction of a large deflection angle is remarkably enhanced, the reflected signal intensity and the imaging definition of a curved surface structure area are improved, and the method is suitable for nondestructive testing of a complex curved surface structure.

The utility model relates to the technical field of ultrasonic transducers, in particular to a flexible wearable ultrasonic array transducer, which comprises a mounting shell and a wearable mechanism, a plurality of groups of array transducer bodies are arranged at the inner upper part of the mounting shell, and a vibrating body is arranged at the upper end of the mounting shell. The left portion and the right portion of the lower end of the installation shell are each provided with two T-shaped clamping blocks, the installation shell is movably connected with the wearing mechanism through the T-shaped clamping blocks, and a fixing belt is arranged in the middle of the rear end of the installation shell. According to the flexible wearable ultrasonic array transducer, the T-shaped clamping block and the T-shaped clamping groove are matched to achieve rapid and stable clamping connection of the installation shell, the flexible wearable belt is conveniently fixed through the hook-and-loop fastener, the tightness degree can be adjusted, the fixing belt and the attaching part are attached to enhance the stability, and the use convenience and stability are improved; meanwhile, the array transducer bodies distributed in a staggered mode enlarge the monitoring range, the monitoring effect is improved, and richer and more accurate data are provided for medical health monitoring.

A method employing the principle of mechanical reciprocity to image the relative acoustic attenuation called shear wave reciprocity imaging (SRI). SRI does not require the pre-stored sample signal for acoustic attenuation evaluation. In SRI, sequential marching pushes similar to acoustic radiation force impulse (ARFI) imaging are excited from an array transducer, and the reciprocal displacements are collected similarly to the plane wave single-track location method (p-STL).

The invention discloses a double-frequency phased array composite pulse histotripsy system and a double-frequency phased array composite pulse histotripsy method. Comprising a double-frequency phased array transducer, a driving control module, a focus control module and a real-time monitoring module, wherein the double-frequency phased array transducer is a double-frequency hundreds of array element phased array transducer or a double-frequency split array transducer; the double frequency multiplication phased array transducer comprises a fundamental frequency array element group and a frequency multiplication array element group, the driving control module is used for outputting driving signals with corresponding frequencies to two groups of array elements, the focus control module is used for regulating and controlling the positions and the number of focuses, and the real-time monitoring module is used for tracking the effect; the double-frequency phased array composite pulse histotripsy system adopts a four-stage composite pulse time sequence to cooperatively control the working states of a fundamental frequency array element group and a frequency multiplication array element group, and is realized in combination with a multi-focus control strategy; according to the method, the defect of fogging zone front cavitation shielding possibly caused by double-frequency millisecond long-pulse tissue damage and the defect that instant B-ultrasonic monitoring is affected by slow bubble dissipation after treatment are overcome.

The application relates to the technical field of ultrasonic transducers, in particular to a self-focusing medical ultrasonic diagnostic array transducer, which comprises, from bottom to top, a backing layer, a piezoelectric layer, a matching layer and an outer layer, the piezoelectric layer is connected with the backing layer and the matching layer in a precise gluing mode, a plurality of array elements are formed by longitudinally slicing and dividing the piezoelectric layer and the matching layer into small squares, the backing layer is composed of a plurality of layers of composite materials with different acoustic impedance rates arranged linearly in the longitudinal direction, the piezoelectric layer is composed of piezoelectric composite materials arranged linearly in the longitudinal direction, and the matching layer is composed of composite materials with different acoustic impedance rates arranged linearly in the longitudinal direction. The core of the application is to control the parameters of the matching layer and the backing material, so that the longitudinal sensitivity is distributed in a certain way, the longitudinal self-focusing is realized, the longitudinal beam characteristics of the transducer are improved, the method is simple, and the manufacturing cost is not high.

The invention relates to the technical field of ultrasonic detection, and discloses a Fresnel array transducer information acquisition system, a manufacturing method and a working method.The system comprises an ultrasonic transducer and a Fresnel array transducer, the Fresnel array transducer is arranged on the side close to a sound wave emitting face of the ultrasonic transducer, and the Fresnel array transducer is arranged on the side close to the sound wave emitting face of the ultrasonic transducer. The ultrasonic transducer is used for transmitting first sound waves, and the Fresnel array transducer is used for focusing the first sound waves and transmitting second sound waves and has the capability of receiving external sound waves. The first sound wave emitted by the ultrasonic transducer can be focused by the Fresnel array transducer, the focusing intensity of ultrasonic imaging is improved, and then the imaging resolution is improved; the ultrasonic transducer and the Fresnel array transducer respectively emit a first sound wave and a second sound wave with different frequencies to form respective optimal imaging depths, so that the acquisition range is expanded.

A three-dimensional high-resolution underwater acoustic imaging system disclosed by the present invention comprises a watertight electronic cabin, an area array transducer deployed under the watertight electronic cabin, and an upper computer, the area array transducer comprises a receiving area array and a transmitting area array, and eight Archimedes spirals are drawn by taking a sound center as a base point, taking eight array elements closest to the area array elements on each spiral as optimized receiving array elements, and determining a receiving area array; an arc between two adjacent array elements on the outermost periphery of the receiving area array is equally divided into five parts, transmitting array elements are designed on equal division points, the receiving array elements serve as the transmitting array elements at the same time, and a transmitting area array is determined; the watertight electronic cabin comprises a signal processing board, and the signal processing board is used for processing signals received by the receiving area array, so that plane sound waves are driven by one transmitter to be transmitted, vortex phase modulation is carried out on each piece of received snapshot data, and vortex phase modulated snapshot data with the topological charge number of 1 is obtained; and the upper computer processes each piece of snapshot data based on an underwater acoustic correlated imaging algorithm to realize three-dimensional high-resolution underwater acoustic imaging.

The invention provides an ultrasonic imaging method and system based on a ring array and a synthetic aperture technology, and the method comprises the steps: sequentially controlling all transmitting array elements in a ring array transducer based on a preset sequence, so as to enable each transmitting array element to sequentially transmit an ultrasonic signal to a corresponding imaging region; the method comprises the following steps: when any current transmitting array element transmits a current ultrasonic signal, acquiring a corresponding echo signal matrix through a plurality of receiving array elements corresponding to the current transmitting array element, and generating a region image of a current imaging region corresponding to the current transmitting array element according to the plurality of echo signal matrixes on the basis of a delay superposition mode, the echo signal matrix is composed of echo signals of all preset pixel points in the current imaging area, and the receiving array element itself is also a transmitting array element; and generating a complete ultrasonic imaging result graph according to the regional image corresponding to each transmitting array element, thereby improving the resolution ratio and real-time imaging frame rate of intravascular ultrasonic imaging.

The invention discloses a device and a method for testing the sensitivity of an array transducer based on a multi-pulse sequence. The device comprises a signal generator, a transmitting system, a receiving system and a data processing unit, the signal generator is used for generating and outputting a characteristic multi-frequency pulse sequence comprising a plurality of frequency points to be measured, the characteristic multi-frequency pulse sequence comprises a frequency point sequence of which the frequencies are arranged from small to large, the front end of the characteristic multi-frequency pulse sequence is provided with a characteristic signal of which the time width is T, and the time length of a single-group discrete pulse sequence is (n + 1) * T (n is the total number of the frequency points to be measured); and the transmitting system comprises a signal source, a power amplifier and a transmitting sound source which are connected in sequence, and is used for converting the characteristic multi-frequency pulse sequence into an underwater acoustic signal for transmitting. The invention solves the problems of poor adaptability, low data accuracy and low efficiency of a single array element sensitivity test system after array transducer array forming in the prior art, provides the array transducer sensitivity test system based on the multi-pulse sequence, and realizes efficient and accurate measurement of the sensitivity of a single transducer in an array.

Continuous wave (CW) Doppler analysis is performed using an ultrasound system with a linear array transducer probe. The linear array may be curved or flat. The array transducer has more transducer elements than the number of channels of a beamformer of the ultrasound system. To accommodate this difference, some of the elements of the array are multiplexed to the beamformer such that only one of a pair of elements is coupled to the beamformer at any one time. The plurality of elements of the array transducer are not multiplexed and are directly coupled to the beamformer. During imaging, both multiplexed and unmultiplexed transducer elements may be used to generate a signal for an image, and during CW Doppler analysis, only unmultiplexed transducer elements are used for CW Doppler transmit and receive apertures.

The invention discloses a bone health evaluation system and method based on a photoacoustic guided wave frequency-wave number spectrum. The bone health evaluation system comprises a computer, a transmitting and receiving control circuit, an analog-to-digital converter, a broadband tunable laser, a laser beam focusing light spot dynamic focusing system, a laser output head, a bone tissue to be detected, an ultrasonic array transducer and a multi-channel signal amplifier. The computer controls the wavelength and energy of a laser beam output by the broadband tunable laser through the transmitting and receiving control circuit, and meanwhile controls the laser beam focusing spot dynamic focusing system to adjust the spot size of the laser beam output to the bone tissue to be detected, so that photoacoustic guided wave excitation under different laser beam radiuses and wavelengths is realized; the transmitting and receiving control circuit synchronously controls the analog-to-digital converter to perform analog-to-digital conversion on the signal from the multi-channel signal amplifier, and inputs the signal into the computer for processing; the ultrasonic array transducer detects and obtains a photoacoustic guided wave time-space wave field signal matrix; and the computer performs frequency wave number spectrum processing on the received laser excitation photoacoustic guided wave signals with different beam radiuses and wavelengths, and executes a multi-mode photoacoustic bone quality evaluation method to realize bone health diagnosis.

A cutting groove is formed in a shape memory alloy tube of a transnasal ultrasonic endoscope body, so that the axial structure of the transnasal ultrasonic endoscope body is regarded as a flexible joint, a driving wire is connected with the top end of the shape memory alloy tube to control bending deformation of the flexible joint, and an ultrasonic transducer module is fixed to the front end of the shape memory alloy tube; the ultrasonic transducer module comprises an ultrasonic transducer and an electric appliance unit thereof, the ultrasonic transducer is a linear array probe, and the linear array probe realizes trapezoidal imaging through electronic delay; the control module is used for controlling the tensioning length of the driving wire; and the cable is connected with the driving host and the ultrasonic imaging host so as to realize control of the control module and ultrasonic imaging. According to the endoscope, a super-elastic memory alloy pipe grooving structure serves as an endoscope body, bending deformation of the endoscope body is controlled through a driving wire, a miniature high-frequency ultrasonic array transducer is integrated in front of the endoscope body, and high-resolution and large-view-field ultrasonic imaging in a limited space is achieved with the assistance of a trapezoidal imaging technology.

The application provides a high-performance transparent piezoelectric composite material, an array transducer and a preparation method thereof, and comprises the following steps: step 1, performing optical-grade polishing treatment on a piezoelectric material to obtain a polished piezoelectric material; step 2, preparing electrodes on the upper and lower surfaces of the polished piezoelectric material to obtain a piezoelectric material provided with electrodes; step 3, performing transparent treatment on the piezoelectric material provided with electrodes to obtain a transparent piezoelectric layer; step 4, arranging one surface of the transparent piezoelectric layer on a substrate, and performing optical-grade polishing treatment on the other surface of the transparent piezoelectric layer until the designed thickness is reached to obtain a polished transparent piezoelectric layer; and step 5, cutting the polished surface of the polished transparent piezoelectric layer according to a preset matrix structure to obtain a high-performance transparent array piezoelectric composite material; and the application can greatly improve the performance of the transparent transducer.

A method (100) for object (e.g., needle) positioning using ultrasound, the method comprising: (i) transmitting (120) a beam from elements of a single element of an array transducer of an ultrasound system (200); (ii) receiving (130) echo signals from the emitted beam at a single element of the array transducer, where at least some of the echo signals are reflected from a needle located at least partially within the patient; (iii) analyzing (140), by a processor of the ultrasound system, the received echo signal; and (iv) determining (150) a distance of the needle relative to the array transducer in the patient based on the analysis.

Embodiments of the invention introduces a method and system for focusing ultrasonic energy through intervening skull tissue into a target site within a target brain tissue region under the skull, includes a transducer emitter array, a transducer receiver array, a processor receiving echo signals from the receiver to determine correction factors for the transducer elements to compensate for refraction occurring due to intervening tissue. The correction factors may include phase correction factors, and the phases of excitation signals provided to the transducer elements may be calibrated focusing based upon the phase correction factors to focus the ultrasonic energy to the tissue at the target site.

A method for performing ultrasound imaging of a region of interest on a subject includes attaching a wearable conformal ultrasound transducer array having a plurality of phased array transducer elements to the subject. A plurality of diverging ultrasonic sound waves are transmitted from the plurality of phased array transducer elements at a plurality of sound wave action angles using different time delay profiles. Reflected ultrasound signals are received from the region of interest using the phased array transducer elements. The reflected ultrasound signals are processed using volumetric beamforming and coherent compounding to recombine the reflected ultrasound signals from all of the acoustic wave action angles. The recombined reflected ultrasound signal is filtered to provide filtered data that separates a tissue motion signal from a blood flow signal. A volumetric energy Doppler image is reconstructed from the filtered data using energy Doppler calculations. And displaying the reconstructed volume energy Doppler image.

An ultrasound imaging system for needle insertion guidance uses a curved array transducer to scan an image field with unsteered beams as a needle is inserted into the image field. Due to differences in the angle of incidence between the radially directed beams and the needle, echoes will return most strongly from only a section of the needle. This section is identified in an image, and the angle of incidence producing the strongest returns is identified. Beams with this optimal angle of incidence are then steered in parallel from the curved array transducer to produce the best needle image. The steep steering angles of some of the steered beams can give rise to side lobe clutter artifacts, which can be identified and removed from the image data using dual apodization processing of the image data.

The utility model belongs to the technical field of acoustic emission sensors, and particularly relates to an air coupling acoustic emission sensor, which is characterized in that a receiver, a piezoelectric transduction device and a coaxial cable are arranged in a matched manner, and internal stress waves of materials enter the sensor from air through a receiving hole in the receiver; a piezoelectric film of the piezoelectric transduction device vibrates, so that the surfaces of an upper electrode and a lower electrode generate polarization proportional to the surface of the piezoelectric film, charges are generated, an array transducer converts the charges into analog quantity electric signals, and the analog quantity electric signals are output from a shielding cable to a coaxial cable through an electrode plate to form analog signal output of the sensor; according to the utility model, the impedance matching layer surrounds the array transducer, so that the influence of external interference on the signal conversion and transmission of the sensor is further reduced. The sensor structure disclosed by the utility model does not need to be in direct contact with a material to realize measurement, so that the limitation of an installation position and an environment on the sensor is reduced, and the measurement precision and stability are improved.

Conformal ultrasound transducer arrangements and supporting registration systems and methods enable automated mapping of transducer elements to the internal anatomy of a patient. Once established, the mapping remains valid despite patient movements, and can be used to select transducer elements and their relative phases so as to create a high-energy focus at an internal target of interest without damage to intervening non-target tissue.

The application discloses a pile bottom karst detection method and system and electronic equipment, and the method comprises the following steps: arranging measuring points at the pile bottom, lowering an array transducer to the pile bottom, and moving to each measuring point in sequence, when the array transducer reaches each measuring point, controlling the array transducer to collect full matrix data corresponding to the measuring point, and measuring the position of the transducer probe and recording the position of the array when collecting data; according to the position of the probe and the position of the array when collecting data, the coordinates of each array element in the array are calculated; imaging point division is performed in the imaging area, the imaging amplitudes of all transmitting / receiving pairs of signals at the imaging points are accumulated and summed, the imaging amplitudes of all imaging points are calculated, and a three-dimensional imaging model is obtained. The application calculates the coordinates of the array and the array elements of each measuring point by the measuring method, adopts the multi-point array data joint imaging mode, solves the problem of low transverse resolution of single-point phased array focusing imaging, and realizes three-dimensional high-precision imaging of the pile bottom karst.

The present invention relates to a method of ultrasonic examination of a structure having a radiused surface focused with a multi-center radius for examination of a radiused surface (26) having a radiused portion (10, 22) of varying radius without mechanically adjusting an array transducer (30, 46). A plurality of focusing laws are designed to electronically steer and focus ultrasound at respective focal points corresponding to the center of curvature of a simulated radiused surface having a varying radius. A mechanical probe (40) carrying the array transducer is positioned to two physical locations outside the radius region and having a spatial relationship that varies less than the radius of the radiused surface variation. As the probe is moved along the radiused portion, the probe maintains the array transducer in a constant position relative to the radiused portion. As the array transducer scans the radiused portion, the array transducer is electronically adjusted to sequentially focus at the respective focal points.

The present invention belongs to the technical field of medical ultrasonic instruments and equipment, and proposes a conformable wearable cardiac ultrasound probe and diagnostic equipment enhanced with an acoustic artificial structure. The array transducer of the wearable ultrasound probe is provided with a curved surface that conforms to the human body, ensuring that the wearable ultrasound probe adheres effectively to the human body and improving the resolution of received ultrasonic echo signals. Furthermore, an acoustic artificial structure comprising a mesh structure composed of a high molecular polymer material and a piezoelectric material filled in the mesh structure is fixed to the curved surface, which can suppress sidelobes and grating lobes in the ultrasonic echo signal, further improving the resolution of the received ultrasonic echo signal. By designing a conformable curved surface on the array transducer and fixing the acoustic artificial structure on the curved surface, the present invention can achieve high-resolution cardiac ultrasound images while reducing the coverage area of ​​the array transducer when attached to the human body, providing a reliable basis for wearable ultrasound products capable of imaging.

The invention discloses a three-dimensional pulse wave non-invasive blood pressure monitoring device and method. The device comprises a liquid bag, an ultrasonic area array transducer, a pressurizing part, a wearing part and a control part. Wherein the liquid bag, the ultrasonic area array transducer and the pressurizing part are arranged on the inner side of the wearing part in a stacked mode, so that preset pressure is applied through the pressurizing part, the inner side of the liquid bag is tightly attached to the skin surface, ultrasonic waves are transmitted or received within a preset range through the ultrasonic area array transducer, and therefore three-dimensional space pulsation information of a user is obtained. The control part is arranged on the wearing part, is connected with the ultrasonic area array transducer and is used for processing information so as to output a blood pressure monitoring result. According to the device, the liquid bag is tightly and flexibly attached to the surface of the skin of the human body through the pressurizing part, the pulse pulsation of the three-dimensional space is measured through the ultrasonic area array technology, and the data size and the fineness are higher.