167 results about "Particle counter" patented technology

The multi-variety medicine particle quantitative sorting system comprises a medicine box conveying line, a plurality of quantitative sorting units are sequentially arranged above the medicine box conveying line in the conveying direction, each type of quantitative sorting unit is used for quantitatively discharging one type of medicine particles, and all the quantitative sorting units are independently controlled; the quantitative sorting unit comprises a mounting frame, a medicine storage tank, a sorting and discharging device and a medicine receiving tank are mounted on the mounting frame, the medicine storage tank is arranged above the sorting and discharging device and fixed to the mounting frame, and the medicine receiving tank is arranged below the sorting and discharging device and fixed to the mounting frame; according to the quantitative sorting system for the multi-variety medicine particles, the medicine particles in the medicine storage tank can be slowly discharged, a small amount of the medicine particles are sorted and sorted for temporary storage, the temporarily stored medicine particles can be discharged according to the specified number and finally collected into the medicine box through the medicine receiving tank, feedback verification is conducted in combination with the medicine particle counter, and the quantitative sorting efficiency of the medicine particles is improved. And accurate and quantitative discharging of various types of medicine particles is ensured.

The invention provides a coal mill oil way plate and a reversing control device thereof, and relates to the technical field of coal mill oil way plates, the coal mill oil way plate comprises a valve block body, a proportional overflow valve, a duplex electromagnetic reversing valve group, a working oil way group, two hydraulic control one-way valve groups, two energy accumulators, a safety overflow valve, an online particle counter and a spiral cooling flow channel. The redundancy design of the duplex electromagnetic directional valve group improves the reliability of the system, so that the system can still be operated when a single valve fails, the hydraulic control one-way valve group realizes mechanical locking of an oil cylinder and can prevent a grinding roller from falling off during power failure, and the energy accumulator is connected with a working oil duct through a connector to absorb pressure impact and compensate leakage, so that the stability of loading pressure is maintained, and the reliability of the system is improved. The on-line particle counter gives an early warning of oil pollution in real time, hydraulic faults can be reduced, the spiral cooling flow channel is matched with the semiconductor temperature control piece to adjust the oil temperature, and the problem of pressure drift caused by oil viscosity fluctuation under high and low temperature working conditions is solved.

The invention provides an FFU filter screen leakage early warning triggering system and method based on a particle counter, and relates to the technical field of filter screen leakage early warning, and the system comprises a data collection module which calculates the actual particle concentration change rate based on the collected data of an FFU; the reference curve construction module is used for establishing an associated reference curve of the rotating speed-particle concentration of the FFU motor under multiple particle sizes based on historical normal working condition data; the anomaly recognition module is used for calculating a deviation value between the actual particle concentration change rate and the associated reference curve, and marking leakage to be detected if a preset anomaly judgment standard appears; and the early warning module detects the abnormal score of the leakage to be detected through an isolated forest unsupervised algorithm, outputs the leakage probability in combination with a gradient boosting tree supervised algorithm, and triggers early warning based on the leakage probability. According to the method and the device, the technical problem of relatively low early warning accuracy of the leakage of the FFU filter screen in the prior art can be solved, and the technical effect of improving the early warning accuracy of the leakage of the FFU filter screen is achieved.

Apparatus and methods are disclosed which are capable of being used to determine filtration efficiency of a filter body even in a clean state. Methods of determining a filtration efficiency of a filter including forcing an inlet flow comprised of a gas (such as air) flow into the inlet end of the filter at a set flow rate, introducing particles such as smoke particles into the inlet flow, and optically counting the number of particles entering and exiting the filter during a sampling event, such as with diffraction based optical particle counters positioned upstream and downstream of the filter. Preferably the gas flow is a soot-free flow stream which does not load the honeycomb filter body with contaminants that need to be removed or burned out. The filter body can thus remain in an essentially clean state even after testing its filtration efficiency.

The invention discloses a high-pressure gas particle counter taking a laser diode as a light source, which comprises an optical detection unit used for generating laser, dividing the laser into a main light path and an auxiliary light path which are independent, respectively irradiating a main detection area and an auxiliary detection area, receiving a particle scattered light signal and converting the particle scattered light signal into an electric signal; the gas path system is used for selectively conveying to-be-detected high-pressure gas and standard particle gas to the main detection area and the auxiliary detection area; the invention belongs to the technical field of gas particulate matter pollution monitoring, and aims to solve the problem of measurement basis misalignment caused by drifting of output light power of a laser diode along with working time increase and temperature change in the prior art. A set of real-time online dynamic calibration mechanism is constructed; the problem of measurement reference drift caused by factors such as light source aging and temperature drift is effectively solved.

A biological particle counting system can include: an impedance particle counter comprising at least one sample aperture; a pump configured to pull particles through the at least one sample aperture of the impedance particle counter for counting, the pump producing a vacuum pressure; and a stepper motor configured to adjust a speed of the pump to substantially maintain the vacuum pressure.

1. Name of the product in this design: Servo Electronic Counting Machine (BPS-D8). 2. Application of this design: This design is a servo electronic particle counter used for counting granular materials. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The inspection device (100) for the columnar honeycomb filter (1) includes: a receiving section (10) for receiving the columnar honeycomb filter (1); an inlet pipe (20) and an outlet pipe (30) for gas flow and connected to the receiving section (10); a particle generating section (40) for generating particles; a particle introducing section (50) for introducing particles generated by the particle generating section (40) into the inlet pipe (20); a gas stirring section (60) provided on the upstream side of the inlet pipe (20) in the gas flow direction (X); and a particle counter (70a, 70b) provided on the downstream side of the inlet pipe (20) and the outlet pipe (30) in the gas flow direction (X) for counting the number of particles.

1. The name of the design product: small flow hand-held laser dust particle counter (KQ-3001PRO2.83L). 2. The use of the design product: the design product can realize the detection of clean room dust particle size and the counting of particle number, can detect 0.2 μm particle number, and is suitable for electronic, semiconductor, liquid crystal panel, micro-nano processing, aerospace, precision machining, new material, scientific research institute and other ultra-clean scenes. 3. The design points of the design product: the overall shape of the product. 4. The picture or photo that can best show the design points: perspective view.

The invention discloses a new chemical material particle counter capable of rapidly replacing a sampling head, and relates to the technical field of new material detection, the new chemical material particle counter comprises a particle counter host, the upper side of the particle counter host is provided with a wind speed sensor used for monitoring wind speed, and the particle counter host is internally provided with a driving mechanism; the driving mechanism is connected with the switching mechanism, a sampling head body is mounted on the switching mechanism, and the diameter of the sampling head body is gradually reduced anticlockwise on the switching mechanism. According to the new chemical material particle counter capable of rapidly replacing the sampling head, through single motor driving and cooperation of the driving mechanism and the switching mechanism, full automation of the sampling head replacing process can be achieved, and the sampling head can be replaced only by controlling the motor to rotate by one circle; the complete process of lifting and separating the current sampling head, rotating the turntable by 90 degrees, switching to the next sampling head and the new sampling head, descending and hermetically connecting can be automatically completed, and the replacement efficiency is greatly improved.

The utility model relates to an oil granularity automatic detection system which comprises a 3axis truss mechanism composed of an X-axis linear module, a Y-axis linear module and a Z-axis linear module, the X-axis linear module is fixed on a metal frame, the Y-axis linear module is connected to the X-axis linear module and moves in the X direction along the X-axis linear module, the Z-axis linear module is connected to the Y-axis linear module and moves in the Y direction along the Y-axis linear module, and the Z-axis linear module is connected to the Y-axis linear module and moves in the Y direction along the Z-axis linear module. A 2D visual module three-finger electric claw is connected to the Z-axis linear module and moves in the Z direction along the Z-axis linear module, the 2D visual module three-finger electric claw is used for grabbing sample bottles from the sample tray, and an automatic particle counter is arranged on the other side of the sample tray and used for detecting the granularity of oil. The X-axis linear module, the Y-axis linear module, the Z-axis linear module, the 2D visual module and a three-finger electric claw are electrically connected with the electric appliance cabinet. The automatic sample feeding device not only can automatically detect, but also can automatically and continuously feed samples, so that manual operation and waiting time are saved, and manpower is liberated.

A copper powder containing copper particulates, wherein the copper powder has a number of particles with a particle size of 1.5 μm or more of 10000 or less per 10 ml of a solution, as measured in the solution using an in-liquid particle counter, the solution having a copper ion concentration of 10 g / L and being obtained by dissolving the copper particulates of the copper powder in nitric acid.

The application discloses a high-pressure gas particle counter with a laser diode as a light source, which comprises an optical detection unit, a gas path system and a standard particle reference system, wherein the optical detection unit is used for generating laser and dividing the laser into two independent light paths, i.e., a main light path and an auxiliary light path, and is used for irradiating a main detection area and an auxiliary detection area respectively and receiving a particle scattering light signal and converting the particle scattering light signal into an electric signal; the gas path system is used for selectively conveying a high-pressure gas to be measured and a standard particle gas to the main detection area and the auxiliary detection area; the application belongs to the technical field of gas particulate pollution monitoring, and aims to solve the problem that the output light power of a laser diode in the prior art will drift with the increase of working time and the change of temperature, thereby causing the measurement reference to be inaccurate, and achieves the technical effect that a real-time online dynamic calibration mechanism is constructed by introducing an auxiliary reference light path and the standard particle reference system, and the problem of the measurement reference drift caused by factors such as light source aging and temperature drift is effectively overcome.

A modular optical particle counter sensor and apparatus are described that consolidates counting functionality on a single main counter board and has expandable functionality through connections to plug-in system boards. The modular optical particle sensor may be directly connected to a manifold with an integrated venturi for better controlling the flow rate of the air stream passing through the apparatus for sampling.

The utility model discloses a flow beam full coverage light resistance method particle counter, which comprises a sampling port, a support frame and a discharge channel, the sampling port is arranged above the support frame, the discharge channel is arranged below the support frame, a flow channel is arranged inside the support frame, the flow channel comprises a leading-in section, a measuring section and a leading-out section, the thickness of the leading-in section and the thickness of the leading-out section are both smaller than the width of the cross section of the measuring section. According to the utility model, the thickness of the leading-in section and the thickness of the leading-out section of the flow channel are reasonably adjusted, so that particulate matters carried by a flow beam completely pass through a measurement area, the problem of missing measurement is avoided, and the comprehensiveness and the reliability of measurement are improved.

Systems and methods for analyzing fluid samples containing nanoparticles for the determination of nanoparticle count and nanoparticle elemental composition are described. In an aspect, a system embodiment includes, but is not limited to, a remote sampling system configured to receive a fluid sample containing nanoparticles, the remote sampling system including a particle counter configured to determine a number of nanoparticles present in the fluid sample via light scattering detection; a sample analysis system configured to receive the fluid sample from the remote sampling system, the sample analysis system including a mass spectrometer configured to determine an elemental composition of the nanoparticles present in the fluid sample; and a system controller communicatively configured to provide a distribution of the nanoparticles in the fluid sample by specific element type based on an output from each of the mass spectrometer and the particle counter.

The application discloses a light-proof flow cell and relates to the field of particle counter accessories, which comprises a first shell and a second shell, flow holes are formed in the first shell and the second shell, a wear-resistant light-blocking layer is arranged between the first shell and the second shell, a plurality of first plug-in holes are formed in the second shell, and a plurality of corresponding first plug-in columns are arranged in the plurality of first plug-in holes. The first shell and the second shell are made of quartz diamond material, and the hardness is high, so that the contact with the detection liquid is diamond material, the wear resistance can be improved, the first plug-in hole and the first plug-in column are arranged at four corners and are matched, and the butt joint precision is improved, so that the grinding effect of the flow holes by the grinding liquid can be effectively reduced, the phenomenon that the pore size of the flow cell becomes large can be avoided, and therefore the accuracy is not greatly affected during counting, and the stability during use and the counting accuracy are improved.

The embodiment of the application provides an optical particle counter, and relates to the technical field of counter processing. The application discloses an optical particle counter, which comprises a support cabinet and further comprises: a detection assembly fixedly installed at the lower part of the support cabinet; wherein the detection assembly comprises: a transmission pipe, and a transparent pipe is integrally formed in the middle part of the transmission pipe. According to the application, liquid samples flow into the transparent pipe section integrally formed in the middle part of the transmission pipe under the driving of the injection assembly, and when the particles in the liquid pass through the intersection point, the light intensity changes: smaller particles mainly cause light scattering signals, which are received and analyzed by a scattering sensor; larger particles block a certain proportion of light flux, forming light intensity reduction signals, which are recognized by a reduction sensor, and a first control board synchronously collects two signals and fuses data, so that particle size recognition, quantity counting and classification output are realized.

This specification relates to an optical particle counter, a method for using an optical particle counter, and a method for reducing particle counting errors during use of an optical particle counter. The method includes placing an optical isolator between a laser and a flow cell to allow laser light to pass through the flow cell and to reduce the intensity of light returned to the laser as optical feedback that could cause mode hopping.

In semiconductor manufacture requiring ultra high purity water, particles of specified sizes are detected using acoustic particle detection capable of detecting nanoparticles. A sensor unit receives a flow of water, with the pressure and rate of flow to the sensor controlled closely. In each sensor unit is a measurement cell to receive a continuous flow of water, with a transducer module engaged with the cell to deliver an acoustic pulse at a known level of intensity as the liquid flows through the cells, the acoustic pulse acting on the liquid at a focus zone to cause cavitation in the event a particle of size detectable at that intensity is present. A waveform emitter / receiver connected to the sensor unit sends high-frequency, high-voltage signal to the transducer module to cause the acoustic pulse, and it also receives a waveform echo indicating a cavitation event. The system is controlled by a microprocessor.

The invention relates to the technical field of detection of particulate matters in liquid, and discloses a method for eliminating bubble interference of a photoresist particle counter, which comprises the following steps: a signal acquisition step: acquiring a light intensity attenuation pulse signal when particles in liquid pass through a detection area through a photoelectric sensor; a feature extraction step of extracting a plurality of features from the pulse signal, the features including an amplitude feature, a time feature and a frequency domain feature; and a classification step: normalizing the features, and inputting the normalized features into a machine learning classification model to obtain a classification result of the particles or bubbles. By combining signal processing, feature engineering and machine learning classification technologies, the bubble interference problem in the photoresist particle counter is effectively solved, and the method has the core advantages that pure algorithm implementation is achieved, hardware modification is not needed, high engineering applicability and economical efficiency are achieved, and the method is suitable for large-scale popularization and application. The method provides an efficient and low-cost solution for improving the particle counting precision and reliability.

To accurately detect fine particles without complicating a device configuration.SOLUTION: The condensation particle counter includes a supply unit configured to supply a working fluid to a periphery of an inlet of a condensation tube through which an aerosol containing sample particles flows, a saturation unit configured to saturate the aerosol with vapor of the working fluid, and a control unit configured to condense and grow the aerosol into droplets using the sample particles as nuclei and extract the aerosol containing the droplets from a center axis of a condensation-growth tube connected to the condensation tube. A condensation and growth section that and exhausts excess working fluid that has flowed down an inner wall of a condensation and growth tube, vapor of the working fluid that has condensed on the inner wall, and water vapor together with excess aerosol, a flow rate control section that controls a flow rate of the aerosol flowing through a capillary tube that the aerosol containing droplets after condensation and growth at a minute flow rate, a double cylindrical sheath flow that positions the aerosol that has passed through the capillary tube on an extension line of a central axis of the capillary tube, and a droplet counting section that counts the droplets contained in the aerosol based on the droplets flowing through the capillary tube, wherein the working fluid contains an alkane having a carbon number of 14 or less.SELECTED DRAWING: Figure 1

This application relates to the field of particle counters, and discloses a method, system, apparatus, and medium for calibrating the output signal of a particle counter. The method includes: acquiring the optical noise signal output by the particle counter to be calibrated, determining whether the optical noise signal meets preset conditions, and if not, transmitting the calibration signal to an optical power control circuit so that the optical power control circuit adjusts the input voltage of the laser in the particle counter to be calibrated, thereby calibrating the output signal of the particle counter. Therefore, the technical solution provided in this application, by acquiring the output signal of the particle counter and adjusting the input voltage of the laser based on the output signal to calibrate the particle counter's output signal, avoids the influence of factors such as temperature and the stability of the signal amplification circuit in the particle counter on the particle counter's output signal during the particle counter's processing of particle scattered light, such as reception, conversion, and amplification, thereby improving the particle monitoring accuracy of the particle counter.

This invention discloses an apparatus and method for determining the filtration efficiency of a filter body even in a clean state. One or more embodiments of this disclosure relate to a method for determining the filtration efficiency of a filter consisting of a porous wall portion having a longitudinal axis extending from an inlet end (202) to an outlet end (204), and an outer peripheral portion extending parallel to the longitudinal axis and surrounding the porous wall portion. The method includes: sealing the outer peripheral portion; forcing an inlet flow consisting of gas into the inlet end (202) of the filter at a set flow rate; introducing particles, such as smoke particles, into the inlet flow; and optically counting the number of particles entering and leaving the filter during a sampling event, for example using diffraction-based optical particle counters located upstream and downstream of the filter.

For analyzing a sample containing particles of at least two categories, such as a sample containing blood cells, a particle counter subject to a detection limit is coupled with an analyzer capable of discerning particle number ratios, such as a visual analyzer, and a processor. A first category of particles can be present beyond detection range limits while a second category of particles is present within respective detection range limits. The concentration of the second category of particles is determined by the particle counter. A ratio of counts of the first category to the second category is determined on the analyzer. The concentration of particles in the first category is calculated on the processor based on the ratio and the count or concentration of particles in the second category.

The utility model relates to a dust particle counter calibration device applied to the field of calibration devices, which comprises a dust particle counting calibration device main body, an airflow calibration module is arranged on the left side of the upper end of the dust particle counting calibration device main body, and the rear end of the dust particle counting calibration device main body is symmetrically and fixedly connected with channel ports. The rear ends of the two channel ports are fixedly connected with a second hollow pipe and a first hollow pipe respectively, the rear end of the second hollow pipe is fixedly connected with a hollow stand column, an efficient circulation middle connecting pipe is fixedly connected between the second hollow pipe and the first hollow pipe, and the rear end of the hollow stand column is fixedly connected with a connecting pipe opening. According to the dust particle counter calibration device, the operation of frequently disassembling an external connection hose and a connecting pipe in efficient circulation is effectively avoided, closing of the input end of the external connection hose and communication of an internal airflow channel are achieved by rotating a shifting valve rod on the adjusting valve block, calibration can be achieved by starting the airflow calibration module, and the calibration process is simplified.

The present application belongs to the technical field of aerosol measurement, and particularly relates to a method and system for measuring the surface tension of cloud droplets in the process of aerosol activation into clouds. The method comprises: building a system for measuring the surface tension of cloud droplets, including a cloud condensation nucleus counter, electrode plates, a high-voltage power supply, a condensation nucleus particle counter, and a differential mobility analyzer; applying a high-voltage electric field to cause positive and negative ions in the droplets to split under the traction of the electric field; aerosol samples are converted into droplets by absorbing water vapor in a cloud chamber, and the droplets split under the traction of the high-voltage electric field; the number concentration of the droplets in the outflow sample is measured by the condensation nucleus particle counter; the critical voltage at which the droplets split is obtained by fitting the graph of the number concentration of the droplets versus the voltage intensity; and the surface tension of the droplets is calculated according to the quantitative relationship between the critical voltage and the surface tension of the droplets. The present application can be used in atmospheric chemical transport simulation and climate models to evaluate the influence of the surface tension of cloud droplets on the number concentration and particle size of the cloud droplets.

The utility model relates to the technical field of atmospheric science detection equipment, in particular to a CCN counter airflow control system with a high-precision flow regulation function, which comprises a high-precision flow regulation valve, a cloud condensation nucleus counter, an optical particle counter, an air storage bottle and an exhaust bottle. Compared with the prior art, the device has the advantages that the condensation nucleus counter, the optical particle counter and the high-precision flow regulating valve are arranged, so that the air inlet flow can be quickly changed, different supersaturation degrees can be generated, the measurement period is shortened, meanwhile, the advanced flow regulating technology and the flow stabilizing device are adopted, the stability and the uniformity of airflow are ensured, and the measurement accuracy is improved. The control device is electrically connected with the flow sensor and the temperature and pressure compensation module, so that the control system can quickly change the air inlet flow, the response time is shortened to the second level, and compared with a traditional method, the measurement speed is greatly increased, and the cloud condensation nucleus number concentration measurement is more accurate; and more reliable data support is provided for atmospheric scientific research.

The application discloses a particle counter, which comprises a pumping source for emitting first wavelength laser; the first wavelength laser emitted by the pumping source enters a laser resonant cavity; a laser crystal is arranged in the laser resonant cavity, and the laser crystal is irradiated by the first wavelength laser to form second wavelength laser, and the second wavelength laser forms light oscillation in the laser resonant cavity; a convex lens group comprises two convex lenses with the same focal length and arranged at intervals, the convex lens group is arranged between the pumping source and the laser resonant cavity, and the convex lens group focuses the first wavelength laser on the laser crystal; an aerosol generating device provides an aerosol airflow into the laser resonant cavity, and the aerosol airflow passes through the light beam of the second wavelength laser; and a photoelectric detection device detects the scattering light signal of the aerosol particles. The application can realize detection of dust particles with a particle size of 0.1 microns, and has the advantages of low power consumption, portability and high detection precision.

The present application belongs to the field of oil liquid defoaming equipment design, and particularly relates to a front cooling defoaming device for liquid particle counter. The device can solve the problem that bubbles do not follow when oil liquid falls. The device comprises a storage tank and a defoaming tank connected at the bottom, and a top cover is installed at the upper end of the two; the defoaming tank has an oil liquid cavity, a defoaming structure is installed at the upper end of the oil liquid cavity, a funnel-shaped liquid leakage port is arranged at the middle of the lower end of the oil liquid cavity, and the bottom of the liquid leakage port is connected with the storage tank through a butterfly valve and a pipeline; a heat conduction ring and a heat conduction aluminum plate are arranged around the liquid leakage port from inside to outside, and an electric heating plate is arranged at the lower side of the heat conduction aluminum plate with a certain gap; a plurality of pairs of cooling pipes penetrating into the oil liquid cavity are arranged on the defoaming tank, and each pair of cooling pipes is connected at the inner end to form a loop; the defoaming structure has a plurality of array structures penetrating the cavity from top to bottom, and the contact surface with the oil liquid is rough. The device can filter the bubbles on the surface of the oil liquid with a high probability, and greatly reduces the occurrence of the situation that bubbles affect the subsequent detection structure.