39 results about "Capillary wave" patented technology

The liquid ejection head has: a surface acoustic wave propagation body in which a surface acoustic wave propagates; a nozzle orifice formed in the surface acoustic wave propagation body; a surface acoustic wave generation device which is provided on the surface acoustic wave propagation body around the nozzle orifice and excites the surface acoustic wave propagation body so that a surface acoustic wave is generated in the surface acoustic wave propagation body; a liquid supply device which supplies liquid to the nozzle orifice; and a guide member which is provided in a center of the nozzle orifice and has a tapered conical surface shape section that projects from an ejection surface of the nozzle orifice in an ejection direction, the liquid forming a curved liquid surface in the nozzle orifice in accordance with the tapered conical surface shape section due to surface tension, wherein the surface acoustic wave generates a capillary wave which propagates through the curved liquid surface in the nozzle orifice and which ejects the liquid from an apex section of the tapered conical surface shape section.

An ink jet recording apparatus that can perform high velocity printing without printing distortion is realized. In a continuous discharge type ink jet recording apparatus, a unit that suppresses a velocity in the vicinity of a center axis is disposed in a unit that injects ink droplets in which because a velocity in an outer periphery is higher than that in a center of a discharged liquid column, a velocity on a surface of the liquid column becomes quickly high, and a capillary wave that propagates on a surface of the liquid column in a travel direction is quickly amplified because the velocity becomes quickly a velocity suitable for droplet breakup, the droplet breakup is quickly generated, and the droplet breakup is surely generated within a charging electrode located next to the nozzle. As a result, an ink jet recording apparatus stable in printing quality performance is provided.

An ink jet recording apparatus that can perform high velocity printing without printing distortion is realized. In a continuous discharge type ink jet recording apparatus, a unit that suppresses a velocity in the vicinity of a center axis is disposed in a unit that injects ink droplets in which because a velocity in an outer periphery is higher than that in a center of a discharged liquid column, a velocity on a surface of the liquid column becomes quickly high, and a capillary wave that propagates on a surface of the liquid column in a travel direction is quickly amplified because the velocity becomes quickly a velocity suitable for droplet breakup, the droplet breakup is quickly generated, and the droplet breakup is surely generated within a charging electrode located next to the nozzle. As a result, an ink jet recording apparatus stable in printing quality performance is provided.

The invention relates to a liquid viscosity test method based on liquid drop mechanical vibration. The method concretely comprises the following steps that a hydrophobic substrate is placed on a ultrasonic probe of a Doppler ultrasonic instrument; liquid drops are generated on the hydrophobic substrate through a microinjector; the liquid drops are vibrated through a vibration triggering device with an automatic rebounding function; then, the vibration triggering device rebounds; the liquid drops generate free vibration; the free vibration of liquid drop surface capillary waves is converted into ultrasonic wave Doppler frequency shift signals by a non-focusing continuous wave Doppler method through the ultrasound probe, and the signals are amplified; a computer signal processing module collects and processes the Doppler frequency shift signals to obtain a liquid drop free vibration characteristic pattern; the free vibration characteristic pattern is subjected to fitting to obtain the decay rate of the liquid drop amplitude along with the time; further, the liquid viscosity is obtained through calculation. When the method is used for measuring the liquid drop viscosity, the responsespeed is high; the application range is wide; the reliability is high; the equipment is portable; the cost performance is high; the reagent consumption is little.

The invention relates to an ultrasonic spray-forming method, which is technically characterized in that: a novel molten metal atomization and deposition manner is provided according to the fundamental principle that molten metal flow is atomized into fine grains by spray-forming; and the fundamental principle of the manner is that: the molten metal flows on the surface of a tool head which vibrates at ultrasonic frequency to form a thin liquid layer; surface tension waves are surged under the action of ultrasonic vibration; liquid drops depart from wave crests when the amplitude of a vibrating surface reaches a certain value; the liquid drops rapidly hit a deposition plate or a collector and are fast solidified under the drive of high-speed inert gas; and metal blanks with required shapescan be manufactured through controlling the position and the angle of a receiver by using different shapes of collectors. The crystal grain of a microstructure of the manufactured blanks is finer.

The invention is related to a method and a signal generator for generating a sea clutter simulation signal used as an input signal for a radar system. The method comprises the steps of: modeling of gravity waves using a physical simulation of a sea surface; modeling of capillary waves using stochastic processes; and adding the modeled capillary waves to the modeled gravity waves.

There are provided an ultrasonic cleaning apparatus and an ultrasonic cleaning method capable of suppressing occurrence of damage on a substrate to be cleaned and capable of performing cleaning at a high cleaning level for highly precise substrates and the like used in an electronics industry. Occurrence of damage on the substrate to be cleaned is suppressed by holding an object to be cleaned so as to be positioned out of a region where perpendiculars extend from an oscillating surface of an ultrasonic transducer to a liquid surface (an ultrasonic-irradiated region) under and in the vicinity of the liquid surface of a cleaning solution, exciting a capillary wave on a surface of the cleaning solution by an ultrasonic wave, and separating particulate contamination of the object to be cleaned by an acoustic pressure generated by the capillary wave without irradiating the object to be cleaned directly with the ultrasonic wave.

The invention discloses a liquid deterioration monitoring method and system based on visible light. The method includes: vibrating the liquid to be measured by a vibration sensor, so that the surface of the liquid generates surface capillary waves under the action of surface tension; using a combination of light sources to emit a variety of visible lights of different colors, and irradiating the liquid surface; receiving light reflected by the capillary waves on the liquid surface Visible light: For the intensity change data of the received visible light, analyze the frequency deviation relationship of the reflected light to obtain the wavelength of the capillary wave on the liquid surface, and then use the wavelength of the surface capillary wave to calculate the surface tension of the liquid; for the received visible light, analyze the different The light intensity absorbed by the liquid under the visible light of the color can be used to obtain the color of the liquid, and then the type of liquid and the microbial content in the liquid can be obtained by combining the color and surface tension. The invention can realize higher precision and low cost liquid deterioration monitoring.

The invention discloses a sine phase modulation laser interferometer and a carrier wave generation and signal demodulation method. The high-frequency acoustic waves are used to generate high-frequency liquid surface acoustic waves at the gas-liquid interface, and the reference light of the homodyne interferometer is incident on the gas-liquid interface. At the interface, the high-frequency liquid surface acoustic wave modulates the phase of the reference light to realize the generation of the phase carrier of the homodyne interference signal; it can solve the problem that the existing PGC demodulation method needs to realize the high-frequency sinusoidal phase modulation of the reference arm of the homodyne interferometer, and realize the High frequency sinusoidal phase modulation requires expensive components. The invention adopts Arctan demodulation algorithm based on real-time normalization to eliminate the influence of carrier phase delay caused by low-frequency capillary waves on liquid surface and carrier modulation depth variation caused by power fluctuation of electroacoustic transducer on demodulation results.

Features described herein relate to ejecting drops from a thin layer of fluid. Piezoelectric elements can generate a uniform high acoustic field, which is transferred through a segmented metal support structure and an acoustic horn. The sound waves generate capillary waves on a thin layer of fluid on a top surface of the acoustic horn. At sufficiently high amplitudes, the capillary waves begin to break apart, resulting in the ejection of drops from the thin layer of fluid.

A method for polymerizing a composition including hydridosilanes and subsequently using the polymers to produce silicon containing layers, comprising the following steps: a) providing a substrate; b) providing a composition including at least one hydridosilane that is dissolved in at least one organic and / or inorganic solvent, or including at least one hydridosilane that is already present in liquid form without solvent, wherein the hydridosilanes comprise at least one linear and / or one branched hydridosilane of the general formula SinH2n+2, where n≥3, and / or a cyclic hydridosilane of the general formula SinH2n, where n≥3; c) polymerizing the composition from step b) by way of acoustic cavitation; and d) coating the surface of the substrate with reaction products from step c). A device for polymerizing a composition including hydridosilanes and subsequently using the polymers to produce silicon containing layers, comprising at least one reaction vessel (1) containing a composition that includes at least one hydridosilane that is dissolved in at least one organic and / or inorganic solvent, or at least one hydridosilane that is already present in liquid form without solvent, wherein the hydridosilanes comprise at least one linear and / or branched hydridosilane of the general formula SinH2n+2, where n≥3, and / or a cyclic hydridosilane of the general formula SinH2n, where n≥3, and / or containing the abovementioned hydridosilane solution or the pure liquid hydridosilane, to which at least monosilane and / or disilane and / or boron containing dopant and / or phosphorus containing dopant and / or a noble gas from the group Ar, He and / or nanoparticles and / or a polymerization initiator and / or a catalyst and / or surface tension modifying agents can be added, and an ultrasound source and / or a sound transducer (4) for generating acoustic cavitation and / or capillary waves, wherein the reaction vessel (1) has at least one closable opening (6), the substrate (8) to be coated is disposed opposite the opening (6), and the substrate (8) comprises a heating source (9) on the surface that faces away from the coating surface.

The invention discloses a curved capillary wave thruster, a preparation method of the curved capillary wave thruster, and a propulsion system based on the curved capillary wave thruster. The structure of the curved capillary wave thruster comprises: a curved substrate, a conductive layer, an electrode, Dielectric layer and hydrophobic layer; the conductive layer is adhered to the substrate, the electrode is adhered to the conductive layer, the dielectric layer is sprayed on the conductive layer and the dielectric layer by magnetron sputtering, and the hydrophobic layer is adhered to the dielectric layer. on the electrical layer. In the working state, the initial contact angle of the curved capillary wave propeller with the liquid is 129°. After applying the electrical signal, the contact angle changes to 68°. By changing the shape of the capillary wave thruster substrate, when the curvature of the capillary wave thruster is larger, the capillary waves close to the hydrophobic layer are bound in a smaller space, and the distance between the same charges carried by the liquid decreases, and they The Coulomb force between them increases and the repulsive force increases, which makes the contact angle change more and thus causes the capillary wave amplitude to increase.

The invention relates to an ultrasonic spray-forming method, which is technically characterized in that: a novel molten metal atomization and deposition manner is provided according to the fundamental principle that molten metal flow is atomized into fine grains by spray-forming; and the fundamental principle of the manner is that: the molten metal flows on the surface of a tool head which vibrates at ultrasonic frequency to form a thin liquid layer; surface tension waves are surged under the action of ultrasonic vibration; liquid drops depart from wave crests when the amplitude of a vibrating surface reaches a certain value; the liquid drops rapidly hit a deposition plate or a collector and are fast solidified under the drive of high-speed inert gas; and metal blanks with required shapescan be manufactured through controlling the position and the angle of a receiver by using different shapes of collectors. The crystal grain of a microstructure of the manufactured blanks is finer.