148 results about "Ultrasound techniques" patented technology

Systems and methods for noninvasive assessment of cardiac tissue properties and cardiac parameters using ultrasound techniques are disclosed. Determinations of myocardial tissue stiffness, tension, strain, strain rate, and the like, may be used to assess myocardial contractility, myocardial ischemia and infarction, ventricular filling and atrial pressures, and diastolic functions. Non-invasive systems in which acoustic techniques, such as ultrasound, are employed to acquire data relating to intrinsic tissue displacements are disclosed. Non-invasive systems in which ultrasound techniques are used to acoustically stimulate or palpate target cardiac tissue, or induce a response at a cardiac tissue site that relates to cardiac tissue properties and/or cardiac parameters are also disclosed.

The invention relates to a method for measuring thicknesses of materials of multilayered structure. This method includes transmitting one or more ultrasound signals including different frequencies into a multilayered structure consisting of two or more materials with one or more ultrasound transducers, measuring materials, acoustic properties for which are different at the frequencies in use, measuring ultrasound signals reflected from the front surface and back surface of the multilayered structure with one or more ultrasound transducer and determining thicknesses of the materials within multilayered structure from the reflected ultrasound signals.

The invention provides an array micro audio directional transducer, belonging to the technical field of ultrasound, in particular to the technical field of transducer. The transducer comprises the following working steps: a plurality of micro transducer units are arranged on a support frame evenly or unevenly for transmitting ultrasound modulated by audible signals; the ultrasound is self modulation in air to generate audible sound with high directivity. The transducer unit consists of four parts, namely, a top electrode, a bottom electrode, radiating materials and a base. The surface of the support frame is coated with plus-minus electrodes to connect with all plus-minus electrodes of the transducer units. The number of the array micro audio directional transducer units can be changed according to the requirements of directivity, sound pressure level and other parameters. The transducer features high conversation efficiency in electro mechanics, strong directivity, good stability, changeable array structure and the like.

Methods and systems for identifying and spatially localizing tissues having certain physiological properties or producing certain biological responses, such as the sensation of pain, in response to the application of intense focused ultrasound (acoustic probing or palpation) are provided. In some embodiments, targeted acoustic probing may be guided or visualized using imaging techniques such as ultrasound imaging or other types of non-invasive imaging techniques.

The invention discloses a method and a device for measuring accumulated liquid of a natural gas pipeline. The method comprises the following steps of: vertically transmitting high-frequency ultrasonic wave into the pipeline by an ultrasonic probe coupled to the outer wall of the measured pipeline, wherein the energy of reflection echo has great difference due to different properties of gas and liquid media; judging that the pipe inner wall is contacted with gas or liquid at the position of the probe according to the characteristic of echo received by the ultrasonic probe and reflected by the pipe inner wall; gradually adjusting the measurement position of the ultrasonic probe on the pipe outer wall along the circumferential direction; and recording a circumferential angle of the ultrasonic probe by a circumferential angle ruler when the echo has mutation, and further calculating the height of the accumulated liquid. The method is a non-intrusive accumulated liquid measurement method, does not change the structure of the conventional pipeline, has no medium leakage risk, does not affect the operation such as cleaning the pipeline and the like, meanwhile is not affected by the composition of gas and liquid phase media in the pipeline and parameters such as temperature, pressure and the like, overcomes the defect that the conventional ultrasonic technology needs complex sound velocity correction, and is particularly suitable for measuring the accumulated liquid inside the pipeline for conveying corrosive and toxic media.

The invention relates to a rapid detection method and a detection device for detecting diseases in a tunnel. The detection method comprises the steps of: detecting the lining thickness and a back cavity through an acoustic emission and laser vibration measurement technology; detecting the lining strength and compactness through the laser ultrasonic technology; detecting underground water behind the lining by utilizing an infrared temperature detection technology; detecting the degradation degree of surrounding rock behind the lining by using a laser scanning and inversion technology; and determining the position of the disease by using inertial navigation and image registration technologies. The detection device for detecting diseases in the tunnel comprises an acoustic emission and laservibration measurement module, a laser ultrasonic module, an infrared temperature detection module, a surrounding rock parameter inversion module and the like. The device runs once in the tunnel to obtain the disease features such as lining thickness and the cavity at the back of the lining, the underwater, weakening degree, the concrete degree and the compactness of surrounding rock, and comparedwith the existing inspection technology, the rapid detection method and a detection device have the advantages that the detection efficiency and the identification precision are greatly improved, thedisease positioning is more accurate, and the influence on the normal traffic driving is obviously reduced.

The invention discloses an ultrasonic scanning method and device, and belongs to the technical field of ultrasounds. According to the method and device provided by the invention, an ultrasonic image collected by an ultrasonic probe is recognized to determine target contour information, the target contour information is matched with a preset cut surface information (eg, standard slice), so that offset data (eg, offset) between the target contour information and the preset cut surface information are obtained; and based on the offset data and posture data of the ultrasonic probe when the ultrasonic image is acquired, adjustment data (the angle and position data of the ultrasonic probe adjustment are recommended) are calculated, so that the method and device can assist an ultrasonic doctor toadjust the position of the ultrasonic probe according to the adjustment data to obtain an accurate and effective ultrasonic image, thereby facilitating diagnosis or examination of a patient.

The invention relates to a system for guiding a probe over the surface of the skin of a patient. Performing measurements with ultrasound techniques for small structures such as blood vessels need well-defined spatial relationship between the measuring probe and the tissue which has to be examined. The invention seeks to ensure a movement of the measuring probe in a controlled and precise way over the skin. Therefore, a system 1 is suggested which comprises a probe holder 2 to which a probe 4 is rigidly attachable. The probe holder 2 is moveable along at least one rail 5, 5'. The rail can be wrapped around the patient 3 or a body part 7 of the patient or the animal.

The invention relates to a treatment method for oily sludge of an oil refinery and belongs to the technical field of sludge treatment. According to the method, firstly, the oily sludge is treated in a manner that a biological demulsifier is assisted with a low-frequency ultrasonic technique, and upper-layer floating oil is removed after precipitating; by a moisture separation device, crude oil can be effectively recovered from the sludge, the recovery rate of the crude oil can be up to 86-95%, and a separated solid phase can be used as a conditioner component after incineration; a conditioner is added into remaining sludge, stirring is carried out while ultrasonic conditioning is assisted, then, the sludge is pumped into a plate-and-frame press filter for dehydrating, the moisture in the sludge can be removed to the maximum, the moisture content of the conditioned sludge is lowered to about 60% from 80-90%, and sludge cakes can be made into an auxiliary fuel when being air-dried until the moisture content of the sludge is 10%; the time spent in the whole process is short, and oil residues and pressure filtrate can be recycled and do not cause secondary pollution, so that the oily sludge treatment method is rapid and environment-friendly.

The invention discloses a high magnetostrictive Fe-based metal glass magnetic material and a preparation method thereof. The chemical formula of the high magnetostrictive Fe-based metal glass alloy is Fe100-x-y-zMozByTbx, wherein, x, y and z are respectively the atomic percents of Tb, B and Mo, 100-x-y-z is the atomic percent of Fe, x is more than 0 and less than or equal to 10, y is more than or equal to 20 and less than or equal to 25, z is more than 0 and less than or equal to 10. The preparation method of the alloy is as follows: the industrial pure metals Fe, Mo, Tb and FeB alloy are proportioned according to the alloy formula and melted repeatedly by induction-arc under the protection of argon to make master alloy, then the high magnetostrictive Fe-based metal glass magnetic material is obtained through casting by using the copper mold spray-casting method. The magnetostrictive coefficient of the magnetic material is 420 ppm to 985 ppm, and the magnetic material has simple components, high thermal stability, and good mechanical properties and amorphous forming ability. The high magnetostrictive Fe-based metal glass magnetic material can be widely applied to the fields of sonar transducer, sensor, ultrasonic technology, communication technology, and the like.

A fullerene fiber refers to a fibrous fullerene crystal material prepared by connecting fullerene monomers through intermolecular forces. The invention relates to a preparation method for polyaniline micro-nano tubes having the thread-shaped structure and products of the polyaniline micro-nano tubes. The thread-shaped polyaniline micro-nano tubes are prepared by employing the fullerene fiber as a removable template. An operation process comprises the steps: with the aid of a good solvent of polyaniline as a medium, preparing a fullerene fiber/polyaniline composite material by an ultrasonic technology, then employing toluene to carrying out repeatedly centrifugal cleaning to remove fullerene in the composite material, and thus obtaining the thread-shaped polyaniline micro-nano tubes. The method has important guiding significance and practical value for application development of the fullerene crystal material as the template; and due to the unique properties and the unique morphology, the prepared thread-shaped polyaniline micro-nano tubes can be expected to be applied to electromagnetic wave shielding materials, antistatic materials, triodes, strong hydrophobic materials, sensor materials and other fields.

A system and method for providing laser generated ultrasound technique utilizing superimposed line sources is presented. The system and method can generate narrowband Lamb waves with a dominant wavelength by superimposing signals of line sources at the pitch corresponding to the desired wavelength. The superposition can be performed in software after data are collected to permit flexibility in the wavelength selected. Selecting the dominant wavelength in signals can reduce signal complexity and the speeds and frequencies of wave modes with the selected wavelength can be determined through dispersion curves. One or more additional techniques including, but not limited to, two-dimensional Fourier transforms and wavelet analysis can be used to further reduce the complexity of the signals. The system and method can be used, for example, for defect detection in thin plates.

This invention describes an ultrasound technique that maps out the mechanical properties of the cornea and the sclera to the intrinsic mechanical loadings in the eye. It helps identify the abnormally weaker or stiffer regions in the eye, to add functional information for early and definitive diagnosis of corneal diseases, surgical planning, prevention of surgical complications, as well as better interpretation of tonometric readings. This technique will allow a spatial mapping of the mechanical strains developed in the cornea or the sclera during ocular pulse or other intraocular pressure fluctuations. The envisioned use of this technique resembles the current clinical ophthalmic ultrasound in terms of the patient experience, but provides functional information about the eye tissue that is not available from current clinical ultrasound.

The invention relates to an ultrasonic wave-hydrogen peroxide enhanced zinc oxide smoke dust leaching method, and belongs to the technical field of wet smelting. The ultrasonic wave-hydrogen peroxide enhanced zinc oxide smoke dust leaching method mainly comprises four steps of preparation of a mixed leaching agent, control of a liquid-solid mass ratio, ultrasonic oxidation leaching and filtration. The ultrasonic technology and the hydrogen peroxide serving as a strong oxidant are introduced into the process for leaching zinc and germanium from the zinc oxide smoke dust, on the one hand, the hydrogen peroxide is uniformly dispersed in a solution by utilizing the ultrasonic technology, the particle size of the smoke dust is reduced, the contact area of the hydrogen peroxide and the zinc oxide smoke dust is increased, and the oxidation efficiency and the reaction rate are improved; and on the other hand, hydrogen peroxide is accelerated to be cracked to generate an oxidizing ion hydroxyl radical-OH which is stronger than hydrogen peroxide by utilizing the cavitation effect and the chemical effect of ultrasonic waves, the thermal effect of the hydrogen peroxide enables the temperature of a reaction medium to rise, so that the decomposition rate of H2O2 is accelerated, and the purposes of saving the dosage of hydrogen peroxide, improving the reaction rate and oxidizing and decomposing sulfide are achieved, so that the leaching rate of zinc and germanium is further improved.

The preparation method of column-supported montmorillonite controlled release material includes the following steps: preparing montmorillonite suspension liquor; preparing column-forming agent; making intercalation reaction between them; ageing and drying; in the inter calation reaction mixing the column-forming agent and montmorillonite suspension liquor according to the ratio of column-forming agent; montmorillonite=0.5-1.5 mmol: 1g; stirring them for 0.5-1 hr. at 60-80 deg.C, then treating by ultrasonic wave and in microwave field making them continuously react. Said material can be used for producing controlled release fertilizer.

The invention relates to the technical field of preparation of in-situ particle-reinforced magnesium-matrix composite materials, in particular to a novel Mg-TiO2-B2O3 synthesis system and a high-strength creep-resisting in-situ submicron/nanometer TiB2 particle-reinforced magnesium-matrix composite material prepared with a direct melt reaction method, a mechanical stirring mode and a high-intensity ultrasound technology. The preparation method comprises the following technological approaches of: adding dried reactants TiO2 and B2O3 powder into a magnesium alloy melt in a mechanical stirring mode, and alternately applying high-intensity ultrasound and mechanical stirring to prepare the composite material after the reactants are added. The technology has a simple process and is especially applicable to the formation of complex components, a synthesized reinforcement is a high-temperature thermodynamically stable ceramic phase, and produced reinforced particles have fine dimension in the range of submicron/nanometer scale, pollution-free surfaces and a good bonding interface with a matrix.

The invention discloses an Nd-Ni-Mo-P/Go chemical composite deposition layer and a preparation method thereof. The preparation method comprises the steps of putting low-carbon steel into Nd-Ni-Mo-P/Go chemical composite deposition liquid and then carrying out ultrasonic-assisted treatment on the low-carbon steel so as to obtain the Nd-Ni-Mo-P/Go chemical composite deposition layer on the surface of the low-carbon steel, wherein every liter of composite deposition liquid is prepared from 20-50g of nickel sulfate hexahydrate, 2-5g of sodium molybdate, 5-20g of sodium hypophosphite, 20-50g of trisodium citrate, 0.1-5g of Nd, 1-10g of graphene oxide and 0.5g of sodium dodecyl benzene sulfonate. The preparation method has the beneficial effects that on the basis of a chemical plating technology and an ultrasonic technology, the nanocomposite deposition layer is prepared on the surface of the low-carbon steel. The composite deposition layer prepared by the method can effectively improve the performances such as corrosion resistance, surface hardness and wear resistance of the low-carbon steel, and can effectively solve the problem that particles crack.

The invention discloses a method for capturing diaphragm movement to assist in judging offline of a breathing machine by utilizing an ultrasonic AI technology. The method comprises the following steps: step S1, a doctor detects the diaphragm muscle position of a patient through an ultrasonic probe to capture the diaphragm muscle motion states of expiration and inspiration of the patient, and diaphragm muscle thickness images during expiration and inspiration are generated on a display interface of an ultrasonic detection device; step S2, the doctor detects the diaphragm position of the patientby using the ultrasonic probe to capture diaphragm motion states of expiration and inspiration of the patient, and a diaphragm mobility change image from expiration to inspiration is generated on a display interface of the ultrasonic detection device; step S3, an AI diagnosis device respectively scans the images generated in the step S1 and the step S2, after scanning is completed, the content ofthe images is analyzed and processed, and the specific numerical values of the diaphragm thickness change rate and the diaphragm mobility of the user are measured and calculated; and step S4, the doctor compares the calculated specific numerical values of the diaphragm thickness change rate and diaphragm mobility of the user with the diaphragm thickness change rate cutoff value and the diaphragmmobility cutoff value respectively.