117 results about "Ultrasonic standing wave" patented technology

Fluid-handling methods and devices for ultrasonic manipulation of fluid-borne particles comprise a fluid-handling manifold and an ultrasonic particle manipulator defining an ultrasonic cavity within the manifold. Fluid-borne particles introduced into the manifold are manipulated by controlling ultrasonic standing waves at the ultrasonic cavity. Cavities having non-uniform configurations, asymmetric standing waves and/or multiple ultrasonic cavities within the manifold are operative to control the movement of the fluid-borne particles, optionally including collecting and holding such particles, transferring particles through an intersection from one channel to another, etc. Solid phase extraction (SPE) particles, biological particles and other fluid-borne particles can be manipulated within the fluid-handling manifold.

The invention relates to a device for manipulation of particles (30) in a sample liquid (32) said device comprising a source of ultrasound (16) capable of emitting ultrasound with a given wavelength, an inlet for a sample liquid (2), one or more outlets (4, 5, 6) and a compartment (14), being dimensioned to support a standing ultrasonic wave (40) of said wavelength, characterised in that the device further comprises an inlet for sheath liquid (1, 3) configured to direct a sheath liquid (34) to extend substantially in parallel to an anti-node plane (46) of the ultrasonic standing wave (40) proximate to a sheathed compartment wall. Specifically the device may be used in combination with a particle enumeration device for enumeration of somatic cells in milk.

The invention relates to a method and a device for separating particles using ultrasonic standing waves which are switched between two different frequencies. A second order harmonic standing wave is used together with the fundamental standing wave. If the particles are exposed to the fundamental standing wave, the forces act to collect particles at the centre. If the particles are exposed to the second order harmonic standing wave, the forces act to collect particles at the two pressure nodes at the sides. By switching the frequency between the second order harmonic standing wave and the fundamental standing wave, particles with different properties will be exposed to different accelerations and are separated into two streams.

In an ultrasonic washer for washing by splaying washing toward an object to be washed or a portion to be washed from a front end of a nozzle, a part of an ultrasonic wave propagation member connected to an ultrasonic transducer is protruded into a cavity of the nozzle into which the washing is filled in order to propagate ultrasonic vibration generated by the ultrasonic transducer to the washing efficiently. Furthermore, the ultrasonic wave propagation member is formed so that a cross-sectional area becomes gradually smaller as approaching to the front end thereof, so that the ultrasonic vibration is converged to the end face of the ultrasonic wave propagation member. Still furthermore, a length of the ultrasonic transducer and the ultrasonic wave propagation member is made to be integral multiplication of a half-wavelength of ultrasonic standing wave oscillation, and the end face of the ultrasonic wave propagation member from which the ultrasonic wave is emitted to the washing is disposed at a position of antinode of the ultrasonic standing wave oscillation where the amplitude becomes the largest.

In an ultrasonic washer for washing by splaying washing toward an object to be washed or a portion to be washed from a front end of a nozzle, a part of an ultrasonic wave propagation member connected to an ultrasonic transducer is protruded into a cavity of the nozzle into which the washing is filled in order to propagate ultrasonic vibration generated by the ultrasonic transducer to the washing efficiently. Furthermore, the ultrasonic wave propagation member is formed so that a cross-sectional area becomes gradually smaller as approaching to the front end thereof, so that the ultrasonic vibration is converged to the end face of the ultrasonic wave propagation member. Still furthermore, a length of the ultrasonic transducer and the ultrasonic wave propagation member is made to be integral multiplication of a half-wavelength of ultrasonic standing wave oscillation, and the end face of the ultrasonic wave propagation member from which the ultrasonic wave is emitted to the washing is disposed at a position of antinode of the ultrasonic standing wave oscillation where the amplitude becomes the largest.

A disclosed method includes the steps of generating at least one ultrasonic standing wave (6′) between at least one set of mutually-opposed ultrasonic transducers (20A, 20B), dispensing metal-containing particles (22, 24, 26) into a node (14) located within the ultrasonic standing wave such that the particles are trapped in the node, positioning a surface of a substrate (160) proximate to the node, melting the particles with an energy beam to form a melt pool (170) in contact with the surface, and allowing the melt pool to cool and solidify into a metal deposit (176) bound to the surface. Apparatuses for carrying out such methods are also disclosed.

The invention provides toad peptide antibiotics separated from toad maggots and a preparation method of antibacterial drugs thereof. The preparation method comprises the following steps: taking toad maggots as raw materials; carrying out ultrafiltration and microfiltration, gel chromatography separation, ultrasonic standing wave liquid preparation chromatography and the like by adopting a solvent extraction method and an ion-exchange resin adsorption method; freeze-drying to prepare the toad peptide antibiotics; and combining the active components with appropriate excipients to prepare tablets, capsules, suppositories, ointments, enteric tablets and the like to be used for treating various diseases. The drugs prepared by the invention have the advantages of wide antibacterial range, specific drug components, controllable quality and stable performance and have industrial production values.

The invention discloses an ultrasonic standing wave type micro-fluidic chip and a preparation method thereof. The ultrasonic standing wave type micro-fluidic chip comprises a glass slide, a micro-fluidic chip, a printed circuit board (a PCB board), a piezoelectric ceramic and a control circuit. The micro-fluidic chip comprises a standing wave reaction chamber and is formed through curing of liquid polydimethylsiloxane (PDMS) prepolymer with a male template, the glass slide is arranged on the micro-fluidic chip prior to curing, and the mold is released after curing the glass slide and the micro-fluidic chip as a whole; the front face of the PCB board is plated with a conductive layer and is connected with the micro-fluidic chip as a whole through the conductive layer and the non-slide surface of the micro-fluidic chip, hole sites corresponding to the micro-fluidic chip are also arranged on the front face of the PCB board, and the piezoelectric ceramic is arranged in a hole site corresponding to the standing wave reaction chamber; and the control circuit is arranged on the back face of the PCB board. The invention has the advantages of simple manufacture, low cost, high controllability, high maneuverability and high degree of integration, and can easily realize the separation, capture and manipulation of cells and samples of other biological living bodies.

The invention belongs to the field of material processing technology, and discloses a dynamic focusing and heating system for particle suspension. The system comprises the following components: a computer control module, a temperature feedback module, a position feedback module, an ultrasonic standing wave suspension module, an ultrasonic dynamic focusing and heating module, a communication connecting position feedback module of the computer control module, a temperature feedback module, an ultrasonic standing wave suspension module, and an ultrasonic dynamic focusing and heating module; the ultrasonic standing wave suspension module comprises an ultrasonic generator, an ultrasonic energy transducer, and a reflection terminal, wherein the ultrasonic generator is electrically connected to the ultrasonic energy transducer, and a radiation terminal and the reflection terminal of the ultrasonic energy transducer form a resonant cavity; the ultrasonic dynamic focusing and heating module comprises a multichannel signal ultrasonic generator and an ultrasonic transducer array, wherein the multichannel signal ultrasonic generator is electrically connected to the ultrasonic transducer array; the invention also discloses a heating method of the heating system. The heating system does not pollute the particles, and the particles do not have conductive and magnetic conductive requirements, solid and liquid state restriction, and transparency requirements; and the heating method is simple.

A fluorescent fiber-optic biosensor system using ultrasonic concentration of particles and cells for the detection of Salmonella typhimurium. A biosensor test chamber serves as an ultrasonic standing-wave cell that allows microspheres or cells to be concentrated in parallel layers or in a column along the axis of the cell. A fiber probe along the axis delivers laser excitation to fluorescent-labeled antibodies of Salmonella and collects the fluorescent signal. The Salmonella-antibody complexes are moved acoustically to the axis of the cell, increasing the fluorescent signal. Alternatively, the Salmonella-labelled antibody complexes attach to unlabeled antibodies that have been immobilized on the surface of polystyrene microspheres. This entire structure can be manipulated acoustically and the increase in the fluorescent signal, which can be an order of magnitude, indicates the presence of Salmonella.

The invention discloses a method for making a silicon micro-nano structure array based on an ultrasonic standing wave field. The method comprises the following steps: (1) preparing corrosive liquid, wherein the corrosive liquid is prepared from an HF solution, an H<2>O<2> solution and an AgNO<3> solution which are mixed uniformly; (2) putting the corrosive liquid obtained in the step (1) into a reaction kettle, putting the reaction kettle into the ultrasonic standing wave field formed by an ultrasonic generator, and starting an ultrasonic power supply to form the ultrasonic standing wave field; and (3) putting cleaned monocrystalline silicon wafers into the reaction kettle, and corroding the monocrystalline silicon wafers for 30-60 minutes to obtain a monocrystalline silicon micro-nano structure array. Through adoption of the method, the ultrasonic standing wave field is combined with a conventional metal-assisted chemical corrosion method, so that metal catalyst particles are accumulated on ultrasonic standing wave points under the action of acoustic radiation force of the ultrasonic standing wave field in a reaction process; the metal catalyst particles are distributed on a monocrystalline silicon surface in a linear array form; and a regular micro-nano structure array is formed on the monocrystalline silicon surface along with the proceeding of a corrosive reaction.

The invention discloses an acoustic levitation system based on an ultrasonic array and a control method of the acoustic levitation system. The acoustic levitation system comprises an upper computer, acontroller, FPGA modules, a driving circuit and a single-sided ultrasonic sensor array. An object is levitated up by calculating a phase of the ultrasonic array and generating a specific sound fieldabove the single-sided ultrasonic sensor array. Compared with the conventional ultrasonic standing wave levitation, the defects of the ultrasonic standing wave levitation at present are overcome; reflection components are not needed; hardware equipment of acoustic levitation is greatly simplified; the levitated object does not need to be surrounded by acoustic components; the object can be levitated in an open space; the maneuverability is also greatly improved; the sound field formed by the array type levitation is capable of easily completing movement along a specific trajectory, so that theconfinement of standing wave nodes is avoided; the application scenes of an acoustic levitation technology are extended; in addition, the acoustic levitation system is simple in overall structure andeasy to implement, is suitable for being extensively popularized and applied, and is especially applicable to processing and transportation of non-contact type materials and biological experiments, and the like.

The invention relates to a method and a device for measuring suspension force in an ultrasonic suspension machine and belongs to the field of measuring. The device can be divided into two parts: a lever balancing part and a force measuring part, through the lever balancing part, measuring of acoustic suspension force can be converted into measuring of supporting force of a weighing sensor, through the force measuring part, the supporting force applied to a small ball 4 by the weighing sensor can be measured, and a specific numerical value of the acoustic suspension force can be obtained according to the lever principle. The method and the device for measuring ultrasonic standing wave suspension force have the advantages of high accuracy (depends on measuring accuracy of the weighing sensor), low cost, simple structure and easiness in operation, the acoustic suspension force applied to small balls of different sizes at any position between ultrasonic emitting end and a reflection adjusting end can be measured.

The invention discloses an ultrasound-assisted method and an ultrasound-assisted device used for extracting nano-particles from nano-powder organic solvent suspension liquid. Based on the special effects of ultrasound in the process for extracting nano-particles from the nano-powder organic solvent suspension liquid, nano-particle extraction and separation effects can be improved. The special effects of ultrasound include a thermochemical effect, a cavitation effect, a mechanical stirring effect and an ultrasonic standing wave effect.

The invention discloses a method of controlling mass transfer of Micro-LEDs by using ultrasonic standing waves, which includes the following steps: a transfer substrate is moved in order to make Micro-LED wafers needing to be transferred aligned with a laser emitter; the laser emitter emits a laser beam to make the Micro-LED wafers detach from the elastic layer of the transfer substrate and fall into the ultrasonic control range, and sound pressure nodes make the Micro-LED wafers suspended; a radiation end face and a reflection end face move on a guide rail to change the spacing between the Micro-LED wafers; an ultrasonic transducer stops emitting ultrasonic waves, and the Micro-LED wafers fall onto the corresponding positions of a target substrate under the action of gravity; and after surface mounting, the next surface mounting process continues. The method of the invention has the advantages as follows: the transfer efficiency is high; the method is not limited by the surface mounting spacing of the Micro-LEDs on the target substrate; and the yield of Micro-LED wafer packaging is high.

The invention discloses an ultrasonic surface standing wave microfluidic chip for micro-particle separation and application, belongs to the technical field of microfluidic analysis, and aims at the problems in the prior art that when a microfluidic chip is used for separating micro-particles, parameter design of the ultrasonic surface standing wave action area is judged only according to experience, particle separation efficiency is low and a large amount of time and cost are wasted. The invention provides a method for separating micro-particles based on an ultrasonic surface standing wave microfluidic chip. The method comprises the steps: determining the size of the sectional area of an internal channel of a microfluidic cavity of the microfluidic chip, the length of an ultrasonic standing wave action area, the inclination angle of the interdigital transducer, the phase change rate of the interdigital transducer, the aperture size of the interdigital transducer, the liquid flow rate during working and the input voltage, and carrying out particle separation. During micro-particle separation, chip design mainly relates to an ultrasonic surface standing wave action area, other areasand focusing methods are not limited, particle separation operation steps and device preparation difficulty are reduced, and particle separation efficiency is improved.

The invention provides biological tempered fuel oil using illegal cooking oil as a raw material and a preparation method thereof and belongs to the technical field of biofuel. The technical essential is that the biological tempered fuel oil comprises, by volume, illegal cooking oil 20.0%-50.%, diesel oil 10.0%-30.0%, composite solvent 5.0%-30.0%, mixed ester 5.0%-20.0% and composite fuel oil additive 0.01%-1.0%. The preparation method comprises the steps of weighing ingredients, placing the ingredients into a reaction tank, perform ultrasonic standing wave processing, performing standing for 2hours and performing filtration to obtain the biological tempered fuel oil. The illegal cooking oil is effectively utilized, the production process is simple, production cost is low, environmental pollution problems and social problems caused by the illegal cooking oil are solved well, wastes are turned into wealth, and the problem of shortage of petrochemical fuel oil is relived.

The embodiment of the invention provides a method and an equipment for controlling the growth of quantum dots, belonging to the field of quantum dot material preparation. The control method comprises the following steps of: arranging a substrate used for growing the quantum dots in a solution in which the quantum dot material is dissolved; arranging at least two lines of intersectant ultrasonic at the same horizontal above the substrate so as to form an ultrasonic standing wave; leading the node column formed by the ultrasonic standing wave to point at the substrate; leading the quantum dot material in the solution to deposit and grow the quantum dots on the substrate by the node columns formed by the ultrasonic standing wave; and adjusting the frequency or wavelength of the ultrasonic in the solution so as to adjust the growth position of the quantum dots on the substrate. The control method has the advantages of simple operation, realizing the controllable positioning growth of the quantum dot, having exact positioning, cheap equipment, and the like, is capable of preparing the material with the specified position growing the quantum dots and is capable of controlling the positions of the quantum dots growing on the substrate by controlling the wavelength and the frequency of the ultrasonic.

The invention relates to a standing wave type ultrasonic dust collector and a dust collection method thereof, belonging to the technical field of ultrasonic standing wave utilization. The standing wave type ultrasonic dust collector disclosed by the invention is used for collecting tiny dust outside a cavity into the cavity by means of a zero-sound pressure position in an ultrasonic standing wavefield of the cavity. The cavity consists of a sound radiation surface, a sound reflection surface, a bottom surface with a dust collecting port, a top surface and two side surfaces. In the traditional dust collector, a rotary electromagnetic motor needs to be used for driving an air pump to enable a large amount of air to flow, thus vacuum or cyclone is formed to collect dust. adopting the rotaryelectromagnetic motor and driving a large amount of air to flow are not needed, therefore, the ultrasonic dust collector disclosed in the invention has the advantages of compact structure, light weight, small size and high utilization rate of energy, furthermore, an ultrasonic wave near the dust collecting port can play a role of sterilizing the surface on which the dust is removed.

The invention discloses a regenerated fuel oil and manufacturing method, which is characterized by the following: adopting plant oil, modified alcohol, waste oil and multi-functional additive as raw material; allocating scientifically; loading raw material in the synthetic reacting tank; disposing through ultrasonic standing wave; stewing; separating oil from impurity sediment; filtering to remove impurity; testing; reserving.

The invention relates to an air humidifying standing wave purifier. The air humidifying standing wave purifier is characterized in that the air humidifying standing wave purifier structurally comprises a case, an ultrasonic water atomizing part, an air-mist mixing humidifying channel, an ultrasonic standing wave purifying part and a water mist standing wave condensation channel; the ultrasonic water atomizing part comprises an ultrasonic power source, ultrasonic generators, a water tank, a water supply channel and a mist spraying channel and is used for atomizing water; the ultrasonic standingwave purifying part comprises an ultrasonic power source, an ultrasonic generator, an ultrasonic vibrating assembly and a water receiving tank and is used for cleaning air; the air-mist mixing humidifying channel communicates with the water mist standing wave condensation channel; dirty air and water mist are mixed in the air-mist mixing humidifying channel; then, water mist mixed gas enters thewater mist standing wave condensation channel, is driven by standing waves formed by the ultrasonic vibrating assembly and gathers on a node face or a node line with the speed being zero; and finally,the water mist and dust gather into water drops to drip into the water receiving tank. The air can be moistened and also purified, and an air filter assembly is not needed.

The invention discloses an ultrasonic standing wave suspension clamping type carrying mechanical hand which comprises a cross beam, wherein the cross beam is equipped with two guide rail platforms, a guide rail is mounted on each guide rail platform, the guide rails are in slide fit with outer slide blocks, the outer slide blocks are fixedly connected with movable platforms, the movable platforms are fixedly connected with inner slide blocks, the inner slide blocks penetrate through ball screws, and the ball screws are used for pushing the inner slide blocks to move through threads; first ends of the ball screws are linked with motor shafts of drive motors; energy converters are mounted on the movable platforms and fixedly connected with amplitude-change poles; one end of one amplitude-change pole is over against one end of the other amplitude-change pole, and a gap is formed between the amplitude-change poles; under a drive action of the drive motors, the two amplitude-change poles do an opposite or reverse synchronous movement. The ultrasonic standing wave suspension clamping type carrying mechanical hand is used for non-contact type carrying of workpieces and realizes a non-contact type clamp function of tail ends of robot arms on a production line.

The invention discloses an array arrangement and transfer method of a Micro-LED substrate. The method comprises the following steps of: according to the diameter of a Micro-LED, determining the ultrasonic wave length of a two-dimensional ultrasonic standing wave field by utilizing lambda/4 < D <= lambda/2; adjusting the positions of four transducers according to the ultrasonic wave wavelength and the size of a substrate, and forming an orthogonal two-dimensional ultrasonic standing wave field above the substrate; determining the node number of sound pressure nodes according to the size and the ultrasonic wave wavelength; and controlling a discharging device to place a preset number of Micro-LEDs according to the number of the nodes, so that the Micro-LEDs are diffused under the action of acoustic radiation force, and redundant Micro-LEDs fall off from the substrate. Therefore, the Micro-LEDs are diffused and sorted under the action of the acoustic radiation force of the two-dimensional ultrasonic standing wave field, so that each Micro-LED occupies one acoustic pressure node, array arrangement and huge amount transfer are realized, the operation is simple, the transfer efficiency is improved, and the cost is reduced. The invention further provides a transfer device and a Micro-LED display device which both have the above beneficial effects.