57 results about "Drop size" patented technology

The present invention uses a novel waveform to allow the droplet volume dispensed from a demand mode inkjet type device to be increased and selected according to easily controllable parameters. The current invention departs from the conventional drive method by significantly increasing the time for energy input in the initial instance as well is in all later application of the drive voltage to the device. In shape, the waveform is the same whether a unipolar or bipolar pulse is utilized; however, the transition times in the initial instance are up to three times the acoustic resonance and the delay times are of the same order. Droplet diameter can be varied from 1X the orifice diameter to 2X the orifice diameter resulting in an 8:1 range of droplet volume. Since the volume modulation results from changes in the waveform used to drive the solder jet device, the drop volume can be changed and altered in real time.

A cooler for an air conditioning system or other system having a heated surface to be cooled has an array of nozzles for issuing a fine spray of liquid. A fan of the cooler induces flow of air over a surface to be cooled, the nozzles issuing into the flow of air the fine spray at a distance from the heated surface such that the liquid of the fine spray is fully evaporated prior to contact with the heated surface. Drop sizes of 20 to 30 microns are typical.

A method and system for generating probabilistic estimates of precipitation intensity from radar reflectivity measurements is provided. In an embodiment, an agricultural intelligence computer system receives radar reflectivity measurements for a particular location from an external data source. The agricultural intelligence computer system constructs a probability distribution of drop sizes describing the probability that the precipitation included drops of various sizes based on the radar reflectivity measurements. The agricultural intelligence computer system samples a plurality of values from the probability of distribution of drop sizes and uses the plurality of values and the radar reflectivity measurements to compute a plurality of rainfall rates. Based on the plurality of rainfall rates, the agricultural intelligence computer system constructs a probability distribution of rainfall rates for the particular location.

An image processing method configured to produce image data output from an image forming apparatus configured to form an image by using a recording head composed of a liquid ejecting head having plural arranged nozzles configured to eject a liquid drop and an energy generating device configured to generate ejection energy corresponding to each nozzle while conducting a halftone processing configured to covert input image data to an N value which is less than a tone (M value) thereof (N value: M>N≧2) is provided, wherein a halftone processing configured to substantially reduce a driving frequency of a driving wave pattern applied to the energy generating device is conducted when a liquid drop with a drop size causing ejection irregularity or a liquid drop from a nozzle causing ejection irregularity is ejected.

An atomizer, comprising a pre-filming region comprising a surface configured to reduce a mean drop size of a liquid to be atomized, wherein the surface has an effective contact angle, with reference to the liquid, of less than about 30 degrees; and a lip portion disposed at an end of the pre-filming region and configured to create hydrodynamic instabilities in a liquid film, wherein the lip portion comprises an alternating pattern of wetting and non-wetting surfaces, wherein the non-wetting surface comprises a contact angle, with reference to the liquid, of greater than 90 degrees, and the wetting surface comprises a contact angle, with reference to the liquid, of less than 90 degrees.

The present invention provides methods and apparatus for controlling the quantity of fluid output (e.g., drop size) by individual nozzles of a print head to a very high precision at a frequency equal to the frequency at which fluid is normally dispensed. This is achieved by mapping fluid quantity control information into the data that represents the image to be printed. Data representative of an image is received and converted into pixel data. In at least one embodiment, the pixel data includes pixels represented by N bits, and the N bits may represent a drop size for the pixel and a union of the N bits may represent a nozzle status. A print head may be controlled based on the pixel data, and the print head may include nozzles that are each adapted to deposit at least one drop size quantity of a fluid on a substrate.

The present invention provides methods and apparatus for controlling the quantity of fluid output (e.g., drop size) by individual nozzles of a print head to a very high precision at a frequency equal to the frequency at which fluid is normally dispensed. This is achieved by mapping fluid quantity control information into the data that represents the image to be printed. Data representative of an image is received and converted into pixel data. In at least one embodiment, the pixel data includes pixels represented by N bits, and the N bits may represent a drop size for the pixel and a union of the N bits may represent a nozzle status. A print head may be controlled based on the pixel data, and the print head may include nozzles that are each adapted to deposit at least one drop size quantity of a fluid on a substrate.

A spray injection analysis and nozzle configuration system is described having a user input unit that collects spray system input parameters and relays the collected parameters to a fluid performance matching unit and / or problem geometry unit for subsequent processing. The user inputs basic system parameters, including the desired spray fluid characteristics, to obtain suggested system configuration, including spray nozzle types and quantities. Accuracy of suggested spray nozzle type and configuration is increased via approximating the viscosity and / or surface tension parameters of the desired spray fluid with that of collected performance data. When a user already knows the desired spray nozzle type and associated system parameters, the user input unit routes this information to the problem geometry unit for creation of a problem geometry file, including calculation of the drop size distribution and spray velocity, and performance modeling via the fluid modeling unit.

The invention provides a minimal quantity lubricating system device. The device comprises a box, an oil way system, a gas way system, a power system and an injection system. The power system comprises a pneumatic motor and an oil liquid driving assembly. The oil liquid driving assembly comprises a driving base, a rolling body, a sleeve and an end cap B. The oil way system comprises an oil tank, a guide pipe and an oil liquid hose. The gas way system comprises a connector A, a gas flow regulating valve, a gas pipe A, a connector B, a connector C and a check valve. The injection system comprises an injection valve body, a piston, an oil amount regulating handle and an end cap A. The pressure of lubricating oil is regulated by rotating the oil amount regulating handle, so that the injection speed and the oil drop size of the lubricating oil are changed. The flow of compressed air is regulated by rotating the gas flow regulating valve, so that the oil amount of the lubricating oil is changed. The minimal quantity lubricating system device is compact in structure and easy to use, and does not need a power source. The industrial commonly used 0.8-1 MPa compressed air is used as a power source, the oil amount and oil drop size can be regulated, and the minimal quantity lubricating system device can be used for general production fields or anti-explosion special environment.

The invention relates to a measuring method of oil drop sizes. The measuring method comprises the steps: manufacturing a two-phase flow fluid sampler, wherein a middle sampling shooting section is shaped like flat cuboid space and is made of transparent materials; connecting both ends of the two-phase flow fluid sampler to a to-be-measured pipeline by flanges, and arranging a high-speed camera lens opposite to two-dimensional surfaces formed by long edges and wide edges of the sampler, so as to shoot fluid in the sampler when oil-water two-phase flow flows across the middle sampling shooting section of the sampler; extracting oil drop edges by utilizing a multi-scale edge detection algorithm; processing the extracted edges and dividing the extracted edges into oil drop adhering images and oil drop non-adhering images; dividing the oil drop adhering images by utilizing a watershed algorithm, and then performing circle fitting operation; directly performing circle fitting operation on the oil drop non-adhering image; integrating two fitting results, so as to obtain an oil drop edge extraction result chart; and calculating the diameter D of each oil drop. By using the measuring method of the oil drop sizes, which is provided by the invention, the size of each oil drop can be accurately measured on the basis of obtaining a high-definition oil-water two-phase flow image.

The present invention relates to crude oil-water separation processes, specifically desalting in a petroleum refinery. More particularly, the present invention relates to a method and system for increase coalescence rates of water drops in a desalter

A print module having nozzles which are centrally disposed in a nozzle face of the module is disclosed. The arrangement of the nozzles is symmetric with respect to fluidic paths in the nozzle plates or chamber plates. The connecting channels between chambers and nozzles can also be symmetric, allowing improved performance and uniformity of drop formation, drop size and drop velocity. The module does not suffer from fluid path differences between chamber plates, uses materials similar to the completed print module without the use of bonding agents such as adhesives, and greatly improves the jetting quality by using uniform or symmetric nozzles. In addition, the print module is slim, flat, robust, and can be slanted in order to increase resolution. A variety of fluids may be dispensed by the print module, including ink. The nozzles and nozzle arrangements in the print module can be made using advanced laser structuring.

The present invention provides a method and device for the acoustic ejection of fluid droplets having a constant drop size from fluid-containing reservoirs having varying fluid heights contained therein without the need for repositioning the acoustic ejector in the z direction by adjusting the RF frequency and amplitude. In one embodiment, the device is comprised of: a plurality of reservoirs each adapted to contain a fluid; an ejector comprising a means for generating acoustic radiation, means for controlling the RF frequency and amplitude used to generate the acoustic radiation, means for focusing the acoustic radiation at a focal point near the fluid surface in each of the reservoirs; and a means for positioning the ejector in acoustically coupled relationship to each of the reservoirs. The invention is useful in a number of contexts, particularly in the preparation of biomolecular arrays.

A spray injection analysis and nozzle configuration system is described having a user input unit that collects spray system input parameters and relays the collected parameters to a fluid performance matching unit and / or problem geometry unit for subsequent processing. The user inputs basic system parameters, including the desired spray fluid characteristics, to obtain suggested system configuration, including spray nozzle types and quantities. Accuracy of suggested spray nozzle type and configuration is increased via approximating the viscosity and / or surface tension parameters of the desired spray fluid with that of collected performance data. When a user already knows the desired spray nozzle type and associated system parameters, the user input unit routes this information to the problem geometry unit for creation of a problem geometry file, including calculation of the drop size distribution and spray velocity, and performance modeling via the fluid modeling unit.

The invention discloses a comprehensive test device and method for rapid solidification heat transfer performance. The comprehensive test device comprises a metal smelting system, a particle size andspeed control system and a sample collection and measurement system; the metal smelting system comprises a graphite crucible and an infrared thermometer with temperature feedback and is used for heating a metal test sample into liquid; the particle size and speed control system comprises a particle size selector used for controlling dropping size of molten metal droplets and a static electric field used for controlling dropping speed of the molten metal droplets; the sample collection and measurement system comprises a cooling base, a high-speed camera, a thermocouple and a computer and is used for bearing and cooling the metal droplets dropped from the metal smelting system and acquiring data. By the arrangement, low cost and less consumption of materials are achieved, the test method issimple in operation, test results are accurate, initial solidification conditions of the metal droplets in different dropping states (dropping size and dropping speed) can be tested comprehensively, the entire rapid solidification process can be reflected clearly, and high persuasion is achieved.

A dispenser and methods for transferring liquids are disclosed. The dispenser may include a capillary tube with tip having an aperture, a piezoelectric actuator coupled to the capillary tube at a location. Actuation of the piezoelectric actuator causes a pressure wave to propagate along the capillary tube toward the tip such that radial motion at the location is transmitted as distally extending axial motion of the tip, thereby causing a droplet of a predetermined volume to be ejected from the aperture. In some embodiments, the capillary tube has a modulus of elasticity in a range which dampens acoustical noise from the actuation and provides single drop stability over a range of drop sizes.

The invention provides a method for preparing gold nanoclusters based on a microfluidic chip and belongs to the field of gold nanocluster synthesis methods. The method is characterized in that gold nanoclusters which have small monodisperse particle sizes and are protected by an alkyl carbon chain sulfhydryl monolayer are synthesized based on the microfluidic chip, hydrophobic modification is performed on the inner wall of the chip channel, and drops can be stably and smoothly formed and fused accurately and are uniform in size. Meanwhile, by the method, the drop sizes are small, chaotic mixing and mass transfer velocities are high, and reactants are uniformly distributed in the channel to facilitate nucleation and growth of nano-particles. The microfluidic chip is made of a transparent PDMS material, the material formation can be monitored and regulation and control can be performed on line in real time through integration with a microscope, the chip is simple in design, a plurality of groups of parallel reaction channels can be easily constructed, high-throughout synthesis can be performed, and the product yield is improved.

Methods and systems for sequentially quantizing probability density functions for inkjet printing. In an example embodiment, an operation can be implemented to quantize probability density functions associated with larger drops among a plurality of drops provided by an inkjet printer. Non-quantized probability functions associated with remaining ink drops are then modified utilizing an error incurred at each quantization during quantization of the probability density functions associated with the larger drops. Quantizing the probability density functions and modifying the non-quantized probability functions continue until all drop size probability functions associated with the plurality of drops are quantized.

The invention discloses an adsorption decoloring method for vegetable oil. The method includes the steps of: firstly conducting micronization treatment on vegetable oil, then transferring the treated oil into a decoloring tank to conduct adsorption decoloring, and then carrying out filtering. The method provided by the invention combines the conventional adsorption decoloring method with micronization treatment, i.e. firstly conducts micronization treatment on vegetable oil and then carries out adsorption decoloring, not only can reduce the oil drop size of finished vegetable oil product obtained by further refining after decoloring, but also can further effectively improve the decoloring effect.

A method for modifying color density values in a dot-based printing system uses a control unit. The control unit implements the modification of the color density values after a raster image has been created and modifies the number and / or size of print dots to be applied to a printing substrate in order to attain pre-defined color density target values.