310results about "Particle and sedimentation analysis" patented technology

A device for sampling of a mixture of ultrafine particles within a moving gas stream includes a suction generator, at least one sample collection element, and a conduit structure coupling the sample collection element with the suction generator. In some embodiments, the suction generator is configurable to separate by suction a portion of a gas stream containing a plurality of ultrafine particles, and to entrain with a motive fluid forming an output mixture. In some embodiments, a conduit is configured to accept a gas stream containing ultrafine particles and to channel it to the collection element.

An apparatus for manipulating particles within a fluid sample includes a substrate having a substrate surface. A surface acoustic wave (SAW) generator generates a SAW within a SAW region of the substrate surface. The SAW has an SAW direction aligned with a pressure node. A channel is configured to receive the fluid sample and the fluid sample has a flow direction which is at an oblique angle to the SAW direction.

A dust sensor includes a multi-wavelength light source, a receiver, and a controller. The light source emits light of different wavelengths. The receiver generates one or more acoustic wave measurement values based on acoustic waves irradiated from the light source to air particles. The controller controls at least one flickering cycle of the light source, determines the type particles based on the acoustic wave measurement values, and calculates the concentration of particles. The controller calculates the concentration of particles in proportion to an intensity of the acoustic wave measurement values, and determine the type of particles based on the acoustic wave measurement values. The acoustic waves are generated differently based on wavelengths of light emitted from the multi-wavelength light source.

In a volumetric gas adsorption measuring method, an initial dead volume of the sample cell and an initial dead volume of a reference cell at the same time point are preliminarily determined. When the gas adsorption on the solid sample is to be measured, a change in the dead volume of the sample cell is calculated on the basis of an internal gas with the sample cell and reference cell immersed in a pressure of the reference cell measured at this time point cryogenic fluid temperature bath, the initial dead volume of the reference cell, and an initial gas pressure of the reference cell measured at a time point of the measurement of the initial dead volume of the reference cell. Then, the initial dead volume of the sample cell preliminarily measured is corrected on the basis of the change in the dead volume of the sample cell for the calculation of the amount of the gas adsorbed on the solid sample.

The invention discloses a visual online image ferrography imaging system, which comprises an image acquisition device, a lens base, a focusing mechanism, an LED (Light Emitting Diode) annular reflection light source and a bicolourable ultra-thin LED backlight source; the image acquisition device is sleeved and fixed at the upper part of the focusing mechanism through the lens base; the bottom of the focusing mechanism is connected with an oil flow channel in ferrography through a thread; the LED annular reflection light source is fixedly connected with a threaded lens cone in the focusing mechanism; the bicolourable ultra-thin LED backlight source is adhered to a sedimentary slide in the oil flow channel in the ferrography. According to the invention, the object distance and the image distance are respectively adjusted through the focusing mechanism; the focal distance error of the lens is corrected; ferrography imaging with the fixed rate of 1.8 times can be realized; simultaneously, high-brightness and uniform illumination can be provided by adopting the LED annular reflection light source; the bicolourable ultra-thin LED backlight source as the transmission light source is wide in illumination range; the full-field ferrography imaging can be realized; the visual online image ferrography imaging system disclosed by the invention has the characteristics of being small in volume, high in imaging quality and easy for extracting visual abrasive particle characteristic information.

The invention provides systems and methods for detecting aerosols. The systems and methods can be used to detect harmful aerosols, such as, bio-aerosols.

A synthetic aperture three-dimensional fluid flow imaging apparatus is provided. The apparatus includes a plurality of cameras. At least two of the cameras are oriented to view a volume along mutually non-parallel directions. The cameras are connected to a programmable computer. The computer captures images from the cameras to generate three dimensional intensity fields. The computer can refocus the images on at least one refocus plane to generate reconstructed three dimensional intensity fields on a plane within the volume. Intensity field cross-correlation is performed on the reconstructed three dimensional intensity fields to extract velocity fields within the volume. The velocity fields represent velocities of objects or fluid phases within the volume. These velocity fields can be recorded for later use.

A particle detector which can detect smaller particles by increasing the pulse width of the particle signal output from a photoelectric transducer element, includes a particle monitoring region formed by irradiating sample fluid with laser light, and light scattered from particles passing through the particle monitoring region is received by a photoelectric transducer element so as to detect a particle. The direction of flow of the sample fluid and the direction of the laser light are arranged parallel to each other. The particle detector may have a condenser lens for condensing the scattered light and a slit provided at a focal point of the condenser lens and extending in a direction parallel to the sample fluid flow. Also, the particle detector may have a condenser circuit for integrating the output signal of the photoelectric transducer element, and a low-pass filter for filtering the output signal of the condenser circuit.

An apparatus and a method for detecting hazardous substances on a surface of an object are provided. The apparatus for detecting hazardous substances on a surface of an object comprises: a conveyer belt (1) for conveying an object, a capture device (6) provided to match the conveyer belt (1), wherein the capture device (6) may automatically capture a substance adsorbed on the surface of the object when the object is being conveyed by the conveyer belt (1), and a detection module (3) for automatically detecting the substance captured by the capture device (6). The present invention also provides a method for detecting a substance adsorbed on the surface of an object by utilizing the detection apparatus and a method for detecting whether the detected substance is hazardous or not. The detection technique of the present invention enables quick detection for poisons, explosives, and other substance particles attached on the surfaces of cargos and mails.

A system for characterizing rheological properties of granular material. A cylindrical measurement cup containing granular material is subject to a uniform vibration induced by a vibration exciter at a user-determined frequency. At the same time, a rotation or an oscillation of a rotating vane tool is performed within the powder and a response measured. Baffles are affixed to the inner wall of the measurement cup to prevent slippage of the granular material during measurement. An energy imparted to the system from the vibration exciter can be measured by an accelerometer coupled to the measurement cup. When sufficient vibrational energy is supplied to the system, a powder contained therein achieves a particle “temperature” sufficient such that the powder behaves as an ergodic system. The visco-elastic properties of the ergodic powder can be reproducibly measured in accordance with known methodology used in molecular fluids, where the powder “temperature” can be varied by changing the vibration frequency or amplitude.

The present invention relates to a method of selecting and/or developing particulate material for a composition comprising the particulate material and a matrix by using at least one homogeneous interaction parameter alone or in combination with at least one heterogeneous interaction parameter. These parameters may comprise at least one interfacial potential property value, at least one value derived from an interfacial potential property value, at least one component of an interfacial potential property value, or combinations thereof for a particulate material and for the matrix. Process and performance maps, as well as methods for mapping, are also disclosed.

The present invention relates to a method of providing product consistency of a particulate material or the product containing the same, by measuring and/or analyzing at least one interfacial potential property value of the particulate material. The method may be used as a QA/QC method to insure product consistency.

The invention relates to a method, device and system for measuring the deposition distribution condition of fog drops. The method comprises the steps of illuminating an area at the lower part of a fog drop spray device; shooting the illuminated area when no fog drop falls off to obtain a background image; shooting the illuminated area when the fog drops fall off to obtain multiple fog drop images; subtracting the background image from each fog drop image to obtain a corresponding particle grey image; and determining the distribution condition of the fog drop deposition amount of the illuminated area according to various particle grey images. According to the method, device and system for measuring the deposition distribution condition of the fog drops, motion of a wind farm and the fog drops is not disturbed, and the method, the device and the system are suitable for small-range, long-term and large-flow spray tests, and are especially suitable for analysis of the deposition distribution of the fog drops under the influence of downwash flow of a rotor.

The invention provides a magnetic induction particle detection device and a concentration detection method. The detection device comprises a signal detection system, a detection pipeline, an excitation coil and a positive even number of induction coils, wherein the excitation coil is connected with a signal processing system and wound on the detection pipeline; and the induction coils are connected with the signal processing system and are sequentially and reversely wound on the excitation coil. The device can facilitate preparation and installation and can improve the detection precision. Themethod comprises the following steps: S1, obtaining an output signal of the signal detection system to obtain a voltage amplitude change condition; and S2, detecting the metal particle concentrationaccording to the obtained voltage amplitude change condition. Through the method, the accuracy of calculation can be improved.

The invention relates to the field of agriculture, in particular relates to a bulk granule collision testing device. A device for bulk granule collision falling point distribution and collision recovery coefficient measurement comprises a material falling mechanism, a collision mechanism, a falling material collecting mechanism and an analysis mechanism, wherein the collision mechanism is positioned below the material falling mechanism, the material falling mechanism is used for placing a to-be-measured granule from a high place into the collision mechanism, and the material falling mechanism is provided with a material falling hole having a size matched with the size of the to-be-measured granule; the collision mechanism is used for colliding the granule flowing out from the material falling mechanism into the falling material collecting mechanism, the falling material collecting mechanism is positioned at the material falling place of the granule after collision, and the falling material collecting mechanism is used for separately collecting the granules coming out of the collision mechanism by; and the analysis mechanism is used for quantitative analysis of the granules in the material falling mechanism. The device and the method disclosed by the invention are convenient for collision falling point distribution and collision recovery coefficient measurement of bulk granules. The structure is simple, and the operation is convenient.

The invention relates to a smoke dust purification system. A fan is arranged at the head end of a filter chamber I; an air bag is arranged inside the head end of the filter chamber I; the air bag is matched with the fan for use; a pulse generator is arranged on the air bag and is connected with an electromagnetic valve through a lead wire; the electromagnetic valve is connected to a partition between a filter chamber II and an ash collection bin through a lead wire; a muffler is arranged below the fan; a motor is arranged below the muffler; a dust detector is arranged on the right side of the motor I; a motion image camera I is arranged at the tail end of a shell body; a 360-degree steering engine is arranged above the shell body; the 360-degree steering engine is controlled to rotate through a motor II; a 180-degree steering engine is arranged above the 360-degree steering engine; a motion image camera II is arranged on the 180-degree steering engine; a heat dissipation opening is formed in an open compartment and is matched with a battery pack for use. The smoke dust purification system is used for purifying smoke dust.

The invention provides an on-line monitoring system for crushing of cereals in a grain tank of a combine harvester. The system comprises a cereal conveying mechanism, an image shooting unit and a processor ARM; the cereal conveying mechanism comprises a roller, an oblique conveying belt and a vibration exciter; the roller is located at a grain tank outlet, the oblique conveying belt is located below the roller, and the vibration exciter is mounted at the bottom of the oblique conveying belt; the image shooting unit is located above the oblique conveying belt in the direction perpendicular to the oblique conveying belt; the image shooting unit comprises a CCD camera, a lens, a light source and a data collection card in sequence; the image shooting unit is used for shooting the cereals periodically and transmitting shot images to the processor ARM; the roller, the CCD camera and the light source are all connected with the processor ARM; the processor ARM is used for controlling the roller, the CCD camera and the light source to be switched on and off and analyzing and processing the shot images transmitted by the image shooting unit. Through the device, the cereals can be monitored on line in real time, operation is easy and convenient, and the accuracy rate is high.

The present invention relates to a method of specifying a batch, lot, or shipment of particulate material by using at least one interfacial potential property value to specify the batch, lot, or shipment of particulate material. A method of representing a grade, brand, or type of particulate material is also disclosed. At least one morphological value and/or chemical value may also be included. The values can be included on a product specification sheet.

The invention relates to the separation of microparticles by means of a nozzle (12) for the release of a separating stream (20), comprising at least one enveloping fluid and microparticles entrained Therein, with a vibration generator (18), for the dispersion of the separation flow (20) into a droplet flow (20′), with a deflector device (24), for separation of the droplet flow (20′) into a through flow (20A) and at least one side flow (20B, 20C, . . . ), depending on signals from an analytical device (38). Said analytical device (38) is provided for the analysis of the microparticles(s) contained in the droplets and to control the deflector device (24). Also provided is a protective chamber for product and personnel protection, in which at least the nozzle (12), the oscillation generator (18) and the deflector device (24) are arranged. The analytical device is arranged essentially outside the microbiological safety cabinet (200), whereby, according to the invention, the protective chamber is part of a microbiological safety cabinet (MSW 200), in particular with a laminar throughflow, with a clean chamber (34) and with a monitoring device (22), provided in a side wall, in particular in the back wall (32) of the microbiological safety cabinet (200), through which the signals of the microparticles arising from the separating stream (20) are supplied to the detectors of the analytical device (38), arranged outside the microbiological safety cabinet (200).