4 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 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 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.