| Entries |
| Document | Title | Date |
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| 20080204749 | Method, system and apparatus for monitoring variations in the size of particles present in a fluid - The present invention relates to a method, system and apparatus for continuously monitoring variations in the size of particles present in a fluid on a real time basis. The method comprises of passing one or more optical signal through the fluid such as engine oil. The variation (attenuation or enhancement) in the intensity of the optical signal is continuously measured with respect to time. In an embodiment, the method, system and apparatus of the present invention enable monitoring of the amount, size and onset of particle agglomeration using single or multiple wavelengths as interrogating optical signal(s). An exemplary embodiment is provided for monitoring of the amount, size and onset of soot particle agglomeration in engine oil using single or multiple wavelengths as interrogating optical signal(s). | 08-28-2008 |
| 20080231854 | APPARATUS AND METHOD FOR DETERMINING THE PARTICLE SIZE AND/OR PARTICLE SHAPE OF A PARTICLE MIXTURE - An apparatus for determining the particle size and/or particle shape of a mixture of particles is provided, comprising
| 09-25-2008 |
| 20090073437 | PLURALITY OF SAMPLES AND METHOD FOR SELECTING A TARGET SAMPLE THEREFROM - The present invention provides a plurality of samples, each of which includes particles of a predetermined particle dimension, within narrow predetermined limits, dispersed in a carrier at a predetermined particle concentration. The predetermined particle dimension and the predetermined particle concentration are the same for each sample. However, advantageously, each sample has a different predetermined ratio of a value of an optical property of the particles to a value of the same optical property of the carrier. The present invention also provides a method for selecting a target sample from the plurality of samples to assess the measurement accuracy or the detection sensitivity of an optical particle analyzer as the predetermined ratio approaches 1. | 03-19-2009 |
| 20090091755 | Measuring method and system for measuring particle size and shape of powdery or grain like particles - The invention relates to a measuring method for measuring the properties of a powder or granular sample ( | 04-09-2009 |
| 20090128809 | METHOD OF ANALYSIS IN OPTICAL MEASUREMENTS - The method of the present invention generates a regularly lined electric field inside a container | 05-21-2009 |
| 20090219529 | METHOD AND APPARATUS FOR DETERMINING THE PARTICLES CONTAINED IN A PARTICLE STREAM - A method and an apparatus for determining the particle content of a particle stream using a source of light and two receivers arranged offset from one another in the flow direction of the particle stream. The receivers provide an electrical signal to an evaluation unit as a function of the radiation intensity which they receive, and this signal makes possible a determination of the flow velocity and particle size. Coincident passage of two particles is indicated by a pulse occurring in the signal due to a “roof collapse” in the pulse caused by a weakening of the radiation intensity as the particles pass a receiver. | 09-03-2009 |
| 20100027006 | DEVICE AND METHOD FOR MONITORING THE PARTICLE CONTAMINATION IN FLOWING HYDRAULIC FLUIDS - A device for monitoring particle contamination in flowing hydraulic fluids includes a mechanism for particle counting and particle sizing. Further, a method for monitoring particle contamination in flowing hydraulic fluids: determines fluid flow velocity; counts particles in the hydraulic fluid passing the light barrier for a fixed period of time; and obtains particle size distribution by using a range of different trigger levels. The monitoring device is insertable into an A/C hydraulic system to enable an online-monitoring of degradation of fluid quality during normal flight operations or on the ground. The device and method help lower costs for A/C maintenance and increase A/C availability since necessary service actions can be scheduled strategically. | 02-04-2010 |
| 20100128266 | MEASURING INSTRUMENT - With a measuring instrument for measuring sample particles moving in a cuvette, for example for measuring a zeta potential or the Brownian size the particles, with a filling device for filling and an emptying device for emptying the cuvette mounted on the ends thereof and with devices for irradiating and for monitoring the particles, it is problematical always to position the cuvette correctly or in a defined manner relative to the direction of radiation and to the monitoring device. To resolve this problem, it is proposed that the cuvette member is mounted by means of a cuvette bearing and the filling and the emptying device are fastened exclusively to the cuvette in such a way that the position of the cuvette relative to the surroundings thereof is determined and defined exclusively by the cuvette bearing. | 05-27-2010 |
| 20100171954 | Method and Apparatus for Analysis and Sorting of Polynucleotides Based on Size - The invention relates to a microfabricated device and methods of using the device for analyzing and sorting polynucleotide molecules by size. | 07-08-2010 |
| 20100201982 | ANALYTICAL METHOD FOR OPTICAL MEASUREMENT - An electric field spatially-regularly arranged is applied to particles movably dispersed in a medium to migrate particles. The resulting density distribution of the particles generates a diffraction grating. In the annihilation process of the diffraction grating through the stop or modulation of the application of the electric field, intensity of diffracted light from the diffraction grating is measured to obtain the size of particles. In the above measurement method, the square root or natural logarithm of the measured value of the diffracted light intensity is used for the analysis to evaluate with high convergence the dispersiveness of the particle size with using the least squares method even in the case of particles of dispersive diameter or the case where particles to be measured include particles of different sizes. | 08-12-2010 |
| 20100208263 | SYSTEM AND METHOD FOR DISTINGUISHING PARTICLES IN A TRANSIENT FLUID - A method for detecting a presence of a particle in a fluid is disclosed. The method includes the steps of directing a beam of electromagnetic radiation into the transient fluid; providing a sensor to detect an intensity of the radiation after passing through at least a portion of the fluid; generating a data representing the intensity detected by the sensor; and analyzing the data based upon a statistical analysis to detect the presence of a particle in the fluid and determine whether the particle is water or a solid particle. | 08-19-2010 |
| 20100231908 | METHOD AND APPARATUS FOR DETECTING SIZE OF PARTICLES IN LIQUID - The size of particles is detected accurately and at low cost even when there are few microparticles as impurities included in a liquid. Provided is a method of detecting a size of particles in a liquid by detecting diffraction fringes appearing due to the particles in the liquid by a light detection portion. Diffraction fringes are detected by a first light detection portion and a second light detection portion that are separated along the flow direction of the liquid. A peak time difference (T | 09-16-2010 |
| 20100245820 | Mass Sensor - A mass sensor is provided for determining the mass of small objects. The mass sensor has a plurality of nanostructures attached to a substrate. The nanostructures and the substrate are irradiated with an electromagnetic wave to determine a first mechanical-electromagnetic resonant frequency of the mass sensor. After a particle is attached to the nanostructures, the substrate and the nanostructures to which the particle is attached are irradiated with an electromagnetic wave to determine a second mechanical-electromagnetic resonant frequency of the mass sensor. A mass of the particle is determined based on a difference between the first and second mechanical-electromagnetic resonant frequencies. | 09-30-2010 |
| 20100253943 | Method and systems for particle characteruzation using optical sensor output signal fluctuation - Methods and systems for particle characterization using a light fluctuation component of an optical sensor output signal. The use of the light fluctuation component enables particle characterization (e.g. provision of information on particle size, type and confidence) without requiring measurements at multiple wavelengths or multiple angles and using relatively lightweight calculations. The methods and systems allow integration of real-time airborne particle characterization into portable monitors. The methods and systems in some embodiments also use the output signal to further characterize particles through determination of particle density information. | 10-07-2010 |
| 20110019187 | METHOD OF ANALYZING PARTICLE SIZE DISTRIBUTION OF PARTICLES IN METAL MATERIAL - A method according to the present invention has: isolating, by extraction, particles contained in a metal material to be analyzed in a solution using a particle isolator; dispersing the particles isolated by extraction into a solvent to prepare a dispersion, and fractionating the dispersion into a plurality of particle dispersions based on particle sizes, using a field flow fractionator; and irradiating laser light on each of the particle dispersions separated based on predetermined particle sizes, to thereby measure absolute values of the particle size based on angular dependence of reflection intensity, and also to thereby measure the number density based on magnitude of reflection intensity. | 01-27-2011 |
| 20110069310 | MICROPARTICLES MEASURING APPARATUS - Disclosed herein is a microparticles measuring apparatus including: an optical detecting section configured to direct a leaser beam toward microparticles passing through a flow channel, detect light emanating from the microparticles, and convert the detected light into electrical signals; and a controlling unit configured to calculate the speed of the microparticles passing through the flow channel according to the electrical signals and suspend the supply of solution containing the microparticles when the calculated speed exceeds a prescribed limit. | 03-24-2011 |
| 20110096327 | Spiral Microchannel Particle Separators, Straight Microchannel Particle Separators, and Continuous Particle Separator and Detector Systems - A spiral microchannel particle separator includes an inlet for receiving a solution containing particles, at least two outlets, and a microchannel arranged in a plurality of loops. Particles within a solution flowing through the spiral microchannel experience a lift force F | 04-28-2011 |
| 20110116092 | Wide Size Range Fast Integrated Mobility Spectrometer - A mobility spectrometer to measure a nanometer particle size distribution is disclosed. The mobility spectrometer includes a conduit and a detector. The conduit is configured to receive and provide fluid communication of a fluid stream having a charged nanometer particle mixture. The conduit includes a separator section configured to generate an electrical field of two dimensions transverse to a dimension associated with the flow of the charged nanometer particle mixture through the separator section to spatially separate charged nanometer particles of the charged nanometer particle mixture in said two dimensions. The detector is disposed downstream of the conduit to detect concentration and position of the spatially-separated nanometer particles. | 05-19-2011 |
| 20110194110 | SPRAY-INSPECTION MACHINE AND METHOD FOR AN ASSEMBLY LINE FOR ASSEMBLING FLUID SPRAY DEVICES - A spray-inspection machine for an assembly line for assembling a fluid spray device, the machine comprising: a support receiving at least one fluid spray device taken directly from the assembly line; an actuator system for actuating a fluid spray device of said support and for creating a fluid spray; determination means for determining real parameters of said spray created by said actuator system; and analyzer means for analyzing said real parameters, said analyzer means comparing said real parameters with pre-determined parameters, wherein said analyzer means determine parameters relating to spray shape and/or particle size and/or particle density and/or particle-size distribution and/or particle speed. | 08-11-2011 |
| 20110216317 | SENSOR FOR SENSING AIRBORNE PARTICLES - A particle sensor is disclosed capable of sensing airborne particles larger than about 10 nm in an airflow passing through a passage inside the sensor. The sensor comprises a high-voltage discharge electrode for generating airborne unipolar ions that charge the airborne particles in the airflow. The generated ions are furthermore used to set-up an ionic wind between the discharge electrode and a counter electrode inside the sensor. The ionic wind is the driving force for maintaining the airflow through the sensor and allows sensor operation to occur free of audible noise. The presence of charged particles in the airflow is measured by an electrical current meter in the particle sensing section which measures the particle-bound charge that precipitates per unit time on the surface of a precipitation electrode after all airborne ions have been removed from air by a separate screening electrode positioned upstream of the particle sensing section. | 09-08-2011 |
| 20120008143 | DEVICE FOR DETERMINING PARTICLE SIZES - The invention generally relates to the determination of particle sizes. The invention relates, in particular, to the determination of the sizes of particles in a particle stream. For this purpose, a first optical measuring system having a first matrix sensor and a lighting means which lights up the measurement volume are provided, wherein the first matrix sensor and the lighting means form a transmitted-light arrangement, and wherein the computation device is set up to use the image data from the first matrix sensor to determine projection surfaces of particles inside the measurement volume which has been lit up, and wherein the optical measuring arrangement comprises a second optical measuring system having a second matrix sensor for detecting the diffraction pattern of the particle, and wherein the computation device is set up to use the projection surfaces and the diffraction pattern to determine a size distribution of the particle in the measurement volume, wherein the computation device is set up to form the size distribution from particle sizes determined using the projection surfaces and from particle sizes determined using the diffraction pattern. | 01-12-2012 |
| 20120250017 | Interferometry-Based Downhole Analysis Tool - Various systems and methods for performing optical analysis downhole with an interferogram (a light beam having frequency components with a time variation that identifies those frequency components. The interferogram is produced by introducing an interferometer into the light path, with the two arms of the interferometer having a propagation time difference that varies as a function of time. Before or after the interferometer, the light encounters a material to be analyzed, such as a fluid sample from the formation, a borehole fluid sample, a core sample, or a portion of the borehole wall. The spectral characteristics of the material are imprinted on the light beam and can be readily analyzed by processing electronics that perform a Fourier Transform to obtain the spectrum or that enable a comparison with one or more templates. An interferometer designed to perform well in the hostile environments downhole is expected to enable laboratory-quality measurements. | 10-04-2012 |
| 20120287434 | Optical Surveillance of Mixing and Separation - The present invention relates to a non-invasive method for surveilling mixing and separation of a suspension in an analytical system using solid phase particles for separation of an analyte by measuring particle distribution with a camera attached to a pipetting device. | 11-15-2012 |
| 20130308130 | INHALER ADAPTOR FOR A LASER DIFFRACTION APPARATUS AND METHOD FOR MEASURING PARTICLE SIZE DISTRIBUTION - The present disclosure relates to an improved device and methods for adapting to a laser diffraction apparatus used for measuring particle size distribution and density of the plume of a powder composition emitted from a dry powder inhaler. | 11-21-2013 |
| 20140268140 | PULSE DISCRIMINATOR FOR PARTICLE COUNTER - An airborne, gas, or liquid particle sensor with a pulse discriminator. The pulse discriminator provides greater qualification of signals associated with detected particulate signals. | 09-18-2014 |
| 20150293005 | On-Line FT-NIR Method to Determine Particle Size and Distribution - This invention relates to a method for the determination of the average particle size or particle size distribution of a material in a gas phase reactor comprising: 1) analyzing the average particle size and particle size distribution of a baseline composition using the method described in ASTM D1921; 2) analyzing the average particle size and particle size distribution of said baseline composition using an FT-NIR analysis technique; 3) preparing a calibration matrix by comparing results from said reference analytical technique to the results from said FT-NIR analysis technique; 4) analyzing the material using an FT-NIR technique; and 5) identifying and quantifying the type and content of particles present in the material by comparing spectral data obtained from said FT-NIR technique of the material to said calibration matrix. | 10-15-2015 |
| 20160084747 | SYSTEM AND METHOD FOR FINDING THE SIZE OF ONE OF MORE INDIVIDUAL PARTICLES, SUCH AS NANOPARTICLES FOR EXAMPLE, IN REAL TIME UTILIZING A MICROSPHERE'S WHISPERING GALLERY MODES ("WGMs") - Example systems and methods are provided to determine the size and/or mass of a particle, such as a nanoparticle for example, deterministically (i.e., non-statistically). At least two resonances of the same radial order, having the same angular momentum number/but different azimuthal numbers m (−l| 03-24-2016 | |
