484 results about "Ultrasonic radiation" patented technology

A system and method for assessing the quality of spot weld joints between pieces of metal includes an ultrasound transducer probing a spot weld joint. The ultrasound transducer transmits ultrasonic radiation into the spot weld joint, receives corresponding echoes, and transforms the echoes into electrical signals. An image reconstructor connected to the ultrasound transducer transforms the electrical signals into numerical data representing an ultrasound image. A neural network connected to the image reconstructor analyzes the numerical data and an output system presents information representing the quality of the spot weld joint. The system is trained to assess the quality of spot weld joints by scanning a spot weld joint with an ultrasound transducer to produce the data set representing the joint; then physically deconstructing the joint to assess the joint quality.

A method for measuring in non-invasive manner the concentration of blood constituents by which backscattered light is measured under the action of ultrasonic radiation focused towards the inside of a central blood vessel. A light source and detection unit are arranged to detect the backscattered light on the skin surface above the blood vessel. The target tissue is illuminated by two discrete optical wavelengths. An average light intensity distribution is detected over the length of a pulse. The distribution is Fournier transformed, and the largest Fournier components and spectral position are determined in relation to the frequency of the ultrasonic radiation. The component concentration in the blood vessel is calculated taking into account the volume of the ultrasonic focus contributing to the signal and blood flow rate.

A flow measuring apparatus (300, 500) measures a fluid flow (130) within a conduit (120) including a wall (110). The apparatus (300, 500) includes a transducer arrangement including at least two transducers (100A, 100B) for alternately emitting and receiving ultrasonic radiation through the conduit wall (110) and the flow (130). The apparatus (300, 500) also includes a signal processing arrangement (310) for generating signals to excite the transducer arrangement (100A, 100B) and for processing received signals provided by the transducer arrangement (100A, 100B) for generating output signals from the signal processing arrangement (310) indicative of properties of the flow. The transducer arrangement (100A, 100B) in cooperation with the conduit (120) provides a first path (200) for Lamb-wave ultrasonic radiation coupling directly from a first of the at least two transducers (100A, 100B), to a second of said at least two transducers to generate a first received signal. The transducer arrangement (100A, 100B) in cooperation with the conduit (120) provides at least one second path (210) for ultrasonic propagation along the wall (100) via Lamb waves coupling to at least a portion of the flow (130) from a first of the at least two transducers (100A, 100B) to a second of the at least two transducers (100A, 100B) to generate a second received signal. The signal processing arrangement (310) determines from said first and second received signals ultrasonic radiation propagation time periods through the first path (200) and through the at least one second path (210), and to perform computational operations on the propagation time periods to determine properties of the flow including, but not limited to, at least one of: fluid flow velocity (v) in the conduit (120), a sound velocity (c) through the fluid (130).

Methods, compositions, and apparatus for localized delivery of compounds are provided. In certain embodiments, acoustic streaming force is used to direct carrier particles to a target site, mediate particle internalization, and release associate compounds. Ultrasound radiation is preferred as the source for the acoustic streaming force. Also encompassed are embodiments in which targeting and membrane permeability enhancement are combined with imaging of the treatment site.

Methods, compositions and apparatus for localized delivery of compounds are provided. In certain embodiments, radiation force is used to direct carriers to a target site, and additional radiation is used to fragment the localized carriers, releasing associate compounds. Ultrasound radiation is preferred as the source for radiation force and for fragmentation. Also encompassed are embodiments in which targeting and fragmentations are combined with imaging of the treatment site. Alternate embodiments are disclosed in which compounds are locally delivered without use of carriers.

An ultrasound oral hygiene and therapeutic device comprises an array of ultrasonic transducers, a power generator, and a filling element. The ultrasonic transducer array, with optional radiation plates and reflection plates, produce uniform ultrasound radiation on each surface desirable to be treated by ultrasound radiation. The soft and resilient filling element snugly fits into a user's oral cavity, confines cleaning solution and the ultrasound action within a limited ultrasound action zone surrounding the surfaces desirable to be treated, and protects all other parts of the oral cavity from ultrasound radiation. The device provides superior, uniform, and consistent cleaning results in a short time. In particular, it cleans the entire dental surface, including the inter-dental and gingival areas. It is extremely easy to use, quiet, durable, energy efficient, and inexpensive in long run.

An ultrasound catheter adapted for accessing small vessels in the distal anatomy is disclosed. The ultrasound catheter comprises an elongate tubular body formed with a delivery lumen. The flexibility and dimensions of the tubular body allow access to the distal anatomy by advancement over the guidewire. An ultrasound radiating member is provided along the distal end portion of the tubular body for emitting ultrasound energy at a treatment site. A drug solution may also be delivered through the delivery lumen and out an exit port to the treatment site.

In one embodiment, a method for treating a vascular occlusion in a patient's body comprises exposing the vascular occlusion to an external ultrasonic energy field that is generated outside the patient's body. The method further comprises positioning an ultrasound radiating member in the patient's body in the vicinity of the vascular occlusion. The method further comprises exposing the vascular occlusion to an internal ultrasonic energy field that is generated by the ultrasound radiating member. The method further comprises using the ultrasound radiating member to detect a first characteristic of the external ultrasonic energy field. The method further comprises adjusting a second characteristic of the external ultrasonic energy field based on the detected first characteristic of the external ultrasonic energy field.

The invention relates to a semi-solid fluidized molding method and a device for metal parts. Liquid metal with the temperature from 0 to 40 DEG C above liquid phase is guided into a pulp container, and then an ultrasonic radiation is lowered down to 1 to 30mm above the liquid surface, ultrasonic radiation is started, and the slurry is cooled at the speed ranging from 0.1 DEG C per second to 3 DEG C per second. The ultrasonic radiation can be pulse radiation or non-radiation pulse with ultrasonic frequency ranging from 12kHz to 80kHz, radiation volume power 5W / cm<3> to 100W / cm<3>, and radiation time from 15s to 1000s; the slurry is poured into molding equipment to be molded into parts after the radiation. The molded part has dense organization, fine and equally distributed grains. The device of the invention comprises a pulp container, a thermostat, an ultrasonic generation and a control unit, a sleeve, and a mold and an injection rod and a molding device. The fluidized molding method and device can be used for fluidized molding of various alloy parts made from aluminum, magnesium, tin, copper and iron etc. The method has the advantages of non-contaminated pulp, long service life of ultrasonic equipment and high part production efficiency.

A motion sensing system device and method which utilize dispersed ultrasonic radiation is disclosed. The system preferably comprises a low profile sensor unit configured to couple to a ceiling position. The sensor unit comprises an ultrasonic transmitter and an ultrasonic receiver and a pair of acoustic reflectors positioned in a transmitting path of the ultrasonic transmitter and a receiving path of the ultrasonic receiver for generating and detecting the ultrasonic radiation in a broadcast field. The acoustic reflectors preferably comprise cones, conical cross-sections and / or combinations thereof which are integral with the ultrasonic transmitter and the ultrasonic receiver and / or are coupled to a housing structure for positioning the acoustic reflectors in the transmitting and / or receiving paths. The sensor unit also preferably comprises a circuit for driving the transmitter and for detecting motion by detecting changes in the receiver signal. In further embodiments, the system also includes an infrared sensor and is configured to generate a response based on the combination of changes in the receiver signal and a signal form the infrared sensor.

The method and device of the present invention for wound treatment with ultrasound standing waves includes a transducer probe to produce ultrasonic waves. The ultrasonic transducer has a tip with a distal radiation surface that radiates ultrasound energy toward the surface of a wound. Ultrasound standing waves occurring as a result of incident and reflected waves from the wound surface create ultrasonic radiation pressure. Ultrasound radiation pressure increases the blood flow in wound area, and ultrasound waves kill bacteria, stimulate healthy tissue cell and treat wounds.

A method of ultrasound imaging is provided herein. The method includes the following stages: transmitting ultrasound radiation towards a target and receiving reflections of the ultrasound radiation from a region of the target in a main reflected signal and one or more auxiliary reflected signals, wherein each one of the reflected signals comprises an input dataset and is associated with a beam with a different and distinct beam pattern; compounding the input datasets from the main reflected signal and one or more auxiliary reflected signals, by the use of a compounding function, said compounding function using parameters derived from spatial analysis of the input datasets.

The invention relates to a method for oxidizing agent-aided restoration of failed lithium cobalt oxide under reinforcement of an ultrasonic field. The method comprises the following concrete steps: disassembling a lithium ion battery to obtain a positive electrode aluminum foil film, calcining the positive electrode aluminum foil film and shaking the positive electrode aluminum foil film to allow lithium cobalt oxide to fall off from a current collector aluminum foil so as to obtain a powdery lithium cobalt oxide material; immersing lithium cobalt oxide powder into a lithium hydroxide solution, dumping mixed liquor into an ultrasonic reaction vessel after mixing, adding an oxidizing agent, rapidly sealing the ultrasonic reaction vessel, carrying out heating to a temperature of 120 DEG C and applying ultrasonic radiation for 8 to 10 h; and after cooling of the ultrasonic reaction vessel, taking out a mixed solution and carrying out cleaning, filtering and drying so as to obtain a restored lithium cobalt oxide material. The method provided by the invention can effectively remove a part of organic matters adhered onto the surface of lithium cobalt oxide, increases lithium ion content in the failed lithium cobalt oxide and enables electrochemical performances of the restored lithium cobalt oxide material to be regenerated; the restored lithium cobalt oxide material can be used as a positive electrode material again for production of a new lithium ion battery; the method has the advantages of simple operation, easily controllable process, low energy consumption, environment friendliness and no generation of secondary pollutants.

The invention belongs to the technical field of the preparation of chemical sunscreen agents, and discloses a high-ultraviolet absorption lignin / chemical sunscreen agent microcapsule adopting lignin as a wall material, and a preparation method thereof. The method comprises the following steps: 1, dissolving 1-20 parts by weight of lignin in 100-200 parts by weight of an aqueous solution with the pH value of 12, adjusting the pH value of the obtained solution to 7-10, and filtering out insoluble substances to obtain a lignin solution; and 2, mixing 10-50 parts by weight of the lignin solution obtained in step 1 with 1-10 parts by weight of a chemical sunscreen agent, and carrying out ultrasonic radiation under a power of 200-1500 W for 10 s to 5 min in order to obtain a lignin / chemical sunscreen agent microcapsule emulsion. The lignin / chemical sunscreen agent microcapsule has the advantages of excellent ultraviolet absorption performance, avoiding of light degradation of the chemical sunscreen agent, good stability, effective avoiding of direct contact and damages of the chemical sunscreen agent to skins, and great application prospect in the field of sunscreen and skincare products.

An ultrasound catheter comprises an elongate tubular body. The elongate tubular body has a proximal region and a distal region opposite the proximal region. The tubular body defines a central lumen having a central lumen diameter. The ultrasound catheter further comprises an elongate, hollow inner core extending through the central lumen. The elongate, hollow inner core has an inner core outer diameter that is less than or equal to the central lumen diameter. The ultrasound catheter further comprises an ultrasound radiating member positioned within the distal region of the tubular body and between the tubular body and the inner core. The ultrasound catheter further comprises at least two electrical conductors extending between the tubular body proximal region and the tubular body distal region. The at least two electrical conductors are positioned between the tubular body and the inner core. The at least two electrical conductors are electrically connected to the ultrasound radiating member. The at least two electrical conductors are wrapped around the inner core a plurality of times in a region between the ultrasound radiating member and the tubular body proximal region.