11 results about "Acoustic levitation" patented technology

This invention provides a washing machine, an automatic dispenser, and a control method thereof. The automatic dispenser uses an ultrasonic generator to emit ultrasonic waves; an upper reflective surface is located above the nozzle; an oblique reflective surface is located below the nozzle. After passing through the oblique reflective surface, the ultrasonic waves form an upward-propagating wave, and after passing through the upper reflective surface, they form a downward-propagating wave. The upward and downward waves superimpose to form a standing wave. The vertical distance between the ultrasonic generator and the upper reflective surface satisfies the resonant cavity condition. The nozzle is located at the acoustic pressure node of the standing wave. The controller acquires the droplet mass that the maximum acoustic levitation force of the ultrasonic wave can support, obtains the dispensing mass, and calculates the target number of dispensing droplets based on the droplet mass that the maximum acoustic levitation force of the ultrasonic wave can support and the dispensing mass. When the counting detector detects that the number of droplets has reached the target number, the nozzle is controlled to stop dispensing droplets. This invention is based on acoustic levitation technology, has a relatively small error, and high dispensing accuracy, offering significant advantages for dispensing concentrated liquids.

The invention provides a non-invasive drug introduction system and method based on near-field acoustic levitation. The system comprises a handheld carrier, a near-field acoustic levitation generation module, a drug carrying acoustic coupling module, a closed-loop monitoring module, a central control module, a man-machine interaction control module and a signal input module. The near-field acoustic levitation generation module is arranged at the front end of the handheld carrier and is used for outputting a focused sound field towards a target area; the drug-loading acoustic coupling module is arranged between the near-field acoustic levitation generation module and a target area and is used for loading drugs and forming an acoustic coupling path; the closed-loop monitoring module is used for collecting state parameters and equipment contact state parameters in the drug introduction process in real time; the central control module is used for dynamically adjusting output parameters according to input information and feedback data and executing safety control in an abnormal state; the signal input module is used for generating and amplifying a driving signal; all the modules cooperate to realize closed-loop regulation and control of noninvasive drug introduction; according to the invention, noninvasive efficient drug guiding and macromolecule transdermal delivery can be realized.

The present application belongs to the technical field of refrigeration and low temperature engineering, and relates to a kind of contactless natural convection refrigeration device of acoustic levitation droplet, including cooling cavity, ultrasonic assembly, semiconductor refrigeration assembly, position adjusting assembly, droplet injection unit, shooting unit and control unit.The present application can actively maintain the stable suspension state of liquid droplet at the acoustic pressure node while carrying out contactless natural convection refrigeration on the liquid droplet.By coupling acoustic levitation and natural convection cooling, the liquid droplet freely hovers in the standing wave acoustic field, completely avoids the heterogeneous nucleation effect caused by container wall contact, and dynamically compensates the morphology fluctuation in the cooling process by using real-time morphology feedback and closed-loop adjustment of acoustic field spacing, so that the liquid droplet is stably suspended, which not only can simulate the rapid phase transition behavior of supercooled liquid droplet in motion or collision process, ensure the accuracy of dynamic simulation of supercooled liquid droplet icing process and the effectiveness of supercooled liquid droplet collision mechanism research, but also can avoid unstable liquid droplet morphology.

The invention relates to the field of surface precision purification, and discloses a treatment system for residual copper in copper foil production, which comprises a pollutant on-line preliminary screening and positioning module, an acoustic levitation excitation module, a laminar flow vortex capture module and a control unit. During working, the primary screening module generates a pollutant probability map by means of hyperspectral imaging; the acoustic levitation excitation module constructs a focusing standing wave sound field at a target position according to the map information, the pollutants are stripped and suspended in a non-contact mode, secondary discrimination is conducted by analyzing the acoustic resonance spectrum of the pollutants, and after confirmation, the sound field phase gradient is applied to actively eject the pollutants; and the ejected pollutants are efficiently captured by stable vortex airflow generated by the laminar flow vortex capturing module. And the control unit performs closed-loop feedback control on the capture flux to realize self-adaptive adjustment of the system.

The present application belongs to the field of acoustic levitation, and particularly relates to an acoustic levitation device and method for self-adaptive adjustment of resonant distance. The device comprises an acoustic receiving end, an acoustic emitting end, a motor, a sliding table, and a signal feedback control module. The acoustic receiving end and the acoustic emitting end are installed on the sliding table which is controlled to move by the motor. The acoustic receiving end is connected to the signal feedback control module. The signal feedback control module detects the size of the output signal of the acoustic receiving end, judges and automatically controls the motor to adjust the distance between the acoustic emitting end and the acoustic receiving end to meet the resonant condition and form a standing wave for stable levitation. The acoustic emitting end is connected to an ultrasonic generator. The present application does not rely on an operator, and measures the sound pressure of the acoustic wave radiated by the emitting transducer at the opposite receiving end by using the receiving transducer in a "listening" mode. The signal feedback control module is used to feedback control the motor to adjust the distance between the levitation resonant cavities, so as to realize self-adaptive adjustment of the acoustic levitation resonant distance.

This invention discloses an acoustic levitation microscopy testing device, belonging to the field of intelligent detection technology, which solves the problems of low efficiency and inability to achieve real-time continuous observation in manual slicing. The present invention features a quantitative jet gun connected to a support at one end via a telescopic robotic arm, with a reed mounted on the jet gun; a jet head is horizontally positioned below the jet gun; a reflector is located in the middle of the support, and a sound wave generator is positioned directly below the reflector; the nozzle of the quantitative jet gun and the outlet of the jet head are located between the reflector and the sound wave generator; several cold needles are mounted on the support via the telescopic robotic arm; the cold needles deliver the collected sample into a reagent kit, which is then transferred to an image analysis system via a sample preparation device for image analysis of the sample. This invention utilizes acoustic levitation for stable particle transport, featuring dynamic real-time continuous observation. By employing a cold needle sample processing system for layer-by-layer analysis of activated sludge, it can achieve the profiling of activated sludge particles.

The present techniques provide a method, apparatus and system for high-speed acoustic levitation, for example high-speed acoustic holography or other applications. A novel technique is presented that allows high-speed multi-point levitation even in the presence of arbitrary sound-scattering surfaces and demonstrates a process that works in the presence of any physical object. Embodiments provide a simplified approach for determining locations of traps in a working volume which may also be termed an acoustic volume or acoustic chamber. Moreover, embodiments provide an approach for determining the location of traps by determining a contribution of a scattering surface in the working volume and a contribution from a target object in the working volume.

The application discloses a non-contact ignition system and a control method, relates to the technical field of solid-phase particle ignition, and belongs to the technical field of solid-phase particle ignition. The non-contact ignition system comprises a sound suspension device, an ignition device, a control device and a monitoring device. The sound suspension device comprises a bearing module arranged on the upper and lower sides of a solid-phase particle and a compensation module arranged around the solid-phase particle. The bearing module can provide a main sound field force for the solid-phase particle so that the solid-phase particle is in a preset suspension area. The ignition device and the monitoring device are arranged on one side of the suspension area. The compensation device can provide a compensation sound field force for the solid-phase particle. The control device is signal-connected with the monitoring device, the bearing module and the compensation module. The size and direction of the main sound field force applied to the solid-phase particle by the bearing module and the size and direction of the compensation sound field force applied to the solid-phase particle by the compensation module are controlled according to the position data of the solid-phase particle, so that the suspension stability of the solid-phase particle during ignition is improved.

The application discloses a kind of multi-dimensional rotation ultrasonic phased array electromechanical combined control acoustic levitation device, belong to acoustic levitation technical field, including two-dimensional rotating device, three-dimensional space movement control platform, ultrasonic phased array, single-chip module, field programmable logic gate array module, ultrasonic vibration element driving circuit module and motor driving circuit module;Single-chip module, field programmable logic gate array module, ultrasonic vibration element driving circuit module and motor driving circuit module calculate and issue the square wave signal of multiple drive ultrasonic vibration element and the control signal of multiple drive two-dimensional rotating device and three-dimensional space movement control platform, realize the control of the amplitude and phase of the sound wave generated by each ultrasonic vibration element in multiple ultrasonic phased arrays, control the two-dimensional angle and three-dimensional space position of each ultrasonic phased array simultaneously, multivariable collaborative control, greatly improve the control area of ultrasonic phased array, realize the non-contact pickup, transmission and fusion etc. operation of micro object in space.

An acoustic levitation system contains an acoustic transducer array emitting acoustic energy of periodically varying intensity. The acoustic transducer array includes a set of transducer elements arranged on a surface extending in at least two dimensions. The transducer elements are controllable in response to a control signal so as to emit the acoustic energy at a wavelength and a phase delay determined by the control signal. A controller generates the control signal such that an acoustic channel comprising one or more high-pressure region enclosing a continuous pressure minimum region that extends along a defined channel path from a start position to an end position. The continuous pressure minimum region enclosed by the one or more high-pressure region represents a trap volume suitable for carrying, levitating and translating matter in a contactless manner.

A method for universal contactless printing comprises depositing a first droplet into a sound field, curing the droplet to form a cured droplet, depositing a second droplet, and securing the second droplet to previously cured droplet by curing the second droplet. The method of contactless printing can be repeated to form a complex three-dimensional structure. The first droplet that is deposited can be secured to a moveable structure by curing the first droplet to the moveable structure. The moveable structure can be moved to place a next droplet to be deposited and cured.