28results about "Liquid dispersion analysis" patented technology

A particulate matter detection device takes holographic images of flowing particulate matter concentrated by a virtual impactor, which selectively slows down and guides larger particles to fly through an imaging window. The flowing particles are illuminated by a pulsed laser diode, casting their inline holograms on a CMOS image sensor in a lens-free mobile imaging device. The illumination contains three short pulses with a negligible shift of the flowing particle within one pulse and triplicate holograms of the same particle are recorded at a single frame revealing different perspectives of each particle. A deep neural network classifies the particles based on the acquired holographic images. The device was tested using different types of pollen and achieved a blind classification accuracy of 92.91%. This mobile and cost-effective device weighs ˜700 g and can be used for label-free sensing and quantification of various bio-aerosols over extended periods.

In one aspect, a detection device is described, comprising: at least one sensor configured to detect a signal of a fluid sample comprising at least one analyte at a plurality of time points within a time period to generate a plurality of readouts of the signal each measured at one of the plurality of the time points within the time period; a first processor configured to generate a temporal profile of the readouts; a memory storing a database comprising a plurality of temporal profiles, each generated from a plurality of readouts of the signal of a known analyte measured by the sensor at the plurality of time points within the time period; a second processor configured to compare the generated temporal profile of the fluid sample with the database to determine the identity and / or concentration of the analyte in the fluid sample; wherein the first and second processors can be the same or different processors. Methods of using detection device for analyzing a fluid sample are also described.

The invention relates to a system (1) for producing bubbles (2) and / or drops (32), wherein the system (1) comprises a production device (3) for the bubbles (2) and / or drops (32) which has a nozzle (4) and a monitoring device (5) for monitoring a production operation of the production device (3).In order to produce bubbles (2) and / or drops (32) with a desired defined buoyancy neutrality and consistency, and to be able to selectively adjust the properties of the bubbles (2) and / or drops (32) during production, it is proposed that the monitoring device (5) includes a sound transducer (6) which is configured to generate signals depending on sound waves (7) produced by the production of the bubbles (2) and / or drops (32), wherein the monitoring device (5) includes an evaluation device (8) which is configured to evaluate the signals generated by the sound transducer (6) to determine a characteristic property of the bubbles (2) and / or drops (32) produced by the production device (3) and / or to determine a characteristic parameter of the production.

An aerosol generating device includes an aerosol generator configured to generate aerosols, and a potentiometric sensor configured to generate a signal based on an electric potential difference that changes according e to changes in components of aerosols generated by the aerosol generator.

A system comprises a particle sensor for a vehicle comprising a light source that directs a beam to an interrogation region outside the vehicle; and an optical detector that receives scattered or reflected light from an aerosol particle in the interrogation region. A processor performs a method for particle classification comprising measuring an optical response from a single particle in the interrogation region by identifying an optical response peak for scattered or reflected light from the interrogation region; measuring an amplitude and duration of the optical response peak; correcting the duration of the optical response peak based on a vehicle airspeed; based on the measured amplitude of the optical response peak, generating an expected optical response duration for water droplet using a calibration table; analyzing the measured optical response duration and the expected optical response duration to determine particle classification; and generating classification probabilities for one or more particle types.

A computer-assisted method to monitor soil porosity at a field study site using a portable apparatus, the method including: acquiring a soil sample using a first container; recording a first measurement of a mass and a volume of the soil sample; adding the soil sample to a second container until the soil sample is added in entirety, wherein the second container is pre-filled with a fluid medium, wherein the soil sample is added to the second container without causing soil clustering, and wherein a second measurement of a mass of the second container with the fluid medium is recorded; recording a third measurement of a mass of the second container with the soil sample fully immersed in the fluid medium; calculating a porosity of the soil sample based on the first, second, and third measurements; and providing, at the field study site, the calculated porosity of the soil sample.

This aerosol-generating device comprises: an aerosol generator for generating an aerosol; and a potential-difference sensor for generating a signal on the basis of potential difference that changes in response to variations in the components of the aerosol generated by the aerosol generator.

To provide an optical air data system for measuring aerosol and molecular scattering of light.SOLUTION: An optical air data system 110 performs one or more signal analysis and data fusion methods comprising: (a) determining aerosol and / or molecular concentration from received data, modifying a data analysis algorithm to optimize any remaining unknown parameters, and outputting enhanced air data parameters; (b) determining aerosol concentration from the received data, dynamically optimizing hardware settings in the air data system to enhance a signal level and avoid system saturation, and outputting enhanced air data parameters; or (c) determining aerosol and / or molecular concentration from the received data, estimating a confidence level of an air data algorithm, verifying optical health of the air data system, and reporting the optical health to a user.SELECTED DRAWING: Figure 1A

The invention relates to a method and a device adapted for the selective counting of individual respiratory droplets and particles comprising water within ambient air. The method is based on a planar capacitive sensor to which droplets and particles are led with a nozzle, which increases their velocity. Entering the electric field of the capacitive sensor, the respiratory droplets and particles change the sensor's capacitance. Because the respiratory droplets and particles containing water exhibit a notably distinct dielectric constant compared to other airborne particles and the air itself, they are counted in a selective way independently on other particulate matter air pollutants. The alteration in the capacitance is converted into an electrical signal, which is measured by known methods.

A nebulizer system capable of identifying when activation has occurred and aerosol is being produced. The nebulizer system monitors the inhalation and exhalation flow generated by the patient and communicates proper breathing technique for optimal drug delivery. The nebulizer system may monitor air supply to the nebulizer to ensure it is within the working range and is producing, or is capable of producing, acceptable particle size and drug output rate. When a patient, caregiver or other user deposits or inserts medication into the nebulizer, the nebulizer system is able to identify the medication and determine the appropriate delivery methods required to properly administer the medication as well as output this information into a treatment log to ensure the patient is taking the proper medications. The system is able to measure the concentration of the medication and volume of the medication placed within the medication receptacle, e.g., bowl.

The invention relates to a method and a device adapted for the selective counting of individual respiratory droplets and particles comprising water within ambient air. The method is based on a planar capacitive sensor to which droplets and particles are led with a nozzle, which increases their velocity. Entering the electric field of the capacitive sensor, the respiratory droplets and particles change the sensor's capacitance. Because the respiratory droplets and particles containing water exhibit a notably distinct dielectric constant compared to other airborne particles and the air itself, they are counted in a selective way independently on other particulate matter air pollutants. The alteration in the capacitance is converted into an electrical signal, which is measured by known methods.

Device (10) for measuring the particle characteristics of a particle (12) located in a measuring volume (14) of the device (10). The device (10) has a light source (16) for generating a light beam (18) that passes through the measuring volume (14) and whose polarization in a cross-sectional plane (30) can be described by a spatially dependent Stokes vector that has a spatially dependent S3 Stokes parameter. Furthermore, the device (10) has a detector unit (34) configured to measure an S3 Stokes parameter of the light beam (18) reflected and / or scattered by the particle (12) and to output a measurement signal as a function of the measured S3 Stokes parameter, and an evaluation unit (82) configured to determine the particle characteristics as a function of the measurement signal from the detector unit (34).

The invention relates to a system (101) for discriminating the size of supercooled droplets for an aircraft. The system (101) comprises at least one laser source (103) configured to emit a laser beam (105) and a focusing device (107) for focusing the laser beam (105) into a cloud (109) of supercooled droplets. The laser source (103) is configured to generate an optical back-injection interference signal from a reflection of the laser beam (105) into the cloud (109) of supercooled droplets, and a processing unit (113) is configured to acquire the interference signal and analyze the amplitude variations of said interference signal using a convolutional neural network so as to classify the droplets in the cloud (109) according to their size. Figure for the abstract: Fig. 3

A device for particle sensing is disclosed. The device includes a sensor including a bulk acoustic wave resonator having a resonant frequency, an acoustic mirror arranged to support the resonator, and a heater in thermal communication with the resonator such that a resonator temperature is based on a heater temperature. The device also includes circuitry connected to the sensor. The circuitry comprises a driver configured to drive the heater with a driver signal having a constant periodic cycle, and an oscillator configured to generate an output signal indicative of the resonant frequency. The resonant frequency is modulated by the resonator temperature.

A device (10) for measuring the particle characteristics of a particle (12) located in a measuring volume (14) of the device (10), comprising: a light source (16) for generating a first light beam (18) and a second light beam (20), each passing through the measuring volume (14); a detector device (69) configured to detect the first light beam (18) and the second light beam (20) reflected and / or scattered by the particle (12) and to output an intensity signal; and an evaluation unit (82) configured to determine the particle characteristics as a function of the intensity signal. The first light beam (18) and the second light beam (20) propagate within the measuring volume (14) along a beam axis (30, 32).The ray axis (30) of the first light ray (18) and the ray axis (32) of the second light ray (20) define between them a propagation angle (34) which is not equal to 0°.

The aerosol generating device comprises: an aerosol generator for generating an aerosol; and a potential difference sensor that generates a signal in accordance with a potential difference that varies as the composition of the aerosol generated by the aerosol generator varies.

The present disclosure provides an aerosol particle detection system comprising an incoherent light source configured to generate incoherent light, a first mirror and a second mirror positioned to define an optical cavity region therebetween, wherein the optical cavity region receives the incoherent light and allows particles to pass through, and a photodetector positioned to detect transmitted light that has passed through the optical cavity region, wherein the photodetector detects changes in intensity of the transmitted light caused by particles passing through the optical cavity region. The incoherent light source comprises a light-emitting diode configured to emit blue light having a wavelength centered at approximately 430 nanometers. The optical cavity region has a length of approximately 6-10 millimeters. The system further comprises an enclosure defining the optical cavity region with an opening configured to allow particles to enter.

The present application discloses a device and a method for testing an omnidirectional anisotropic permeability tensor, and relates to the technical field of core testing devices. The device includes a core holder and a spherical core, and is provided with a simulated wellbore passing through the spherical core. The spherical core rotates with the simulated wellbore. A flow guide tube and a plurality of liquid flow channels are also provided on the core holder. When in use, the omnidirectional anisotropy measurement for the core permeability can be achieved by rotating the spherical core and changing the liquid flow channels, thereby completing the measurement of the core permeability tensor.

The invention relates to a device (10) for measuring a particle characteristic of a particle (12) located in a measurement volume (14) of the device (10). The device (10) has a light source (16) for generating a light beam (18) which passes through the measurement volume (14) and the polarization of which in a cross-sectional plane (30) can be described by means of a location-dependent Stokes vector which has a location-dependent S3 Stokes parameter. Furthermore, the device (10) has a detector apparatus (34) which is designed to measure an S3 Stokes parameter of the light beam (18) reflected and / or scattered off the particle (12) and to output a measurement signal on the basis of the measured S3 Stokes parameter, and an evaluation unit (82) which is designed to determine the particle characteristic on the basis of the measurement signal of the detector apparatus (34).

The invention relates to a device (10) for measuring a particle characteristic of a particle (12) located in a measurement volume (14) of the device (10), comprising: a light source (16) for generating a first light beam (18) and a second light beam (20), which each pass through the measurement volume (14); a detector apparatus (69) which is designed to detect the first light beam (18) reflected and / or scattered off the particle (12) and the second light beam (20) reflected and / or scattered off the particle (12) and to output an intensity signal; and an evaluation unit (82) which is designed to determine the particle characteristic on the basis of the intensity signal. The first light beam (18) and the second light beam (20) propagate along respective beam axes (30, 32) in the measurement volume (14). The beam axis (30) of the first light beam (18) and the beam axis (32) of the second light beam (20) define a propagation angle (34) not equal to 0° therebetween.

Real-time detection of particulate matter during deposition chamber manufacturing is disclosed. The disclosed embodiments describe a system comprising: a deposition chamber; a light source generating an incident light beam, wherein the incident light beam is used for illuminating a region of the deposition chamber; and a camera collecting scattered light originating from the irradiation region of the deposition chamber, where the scattered light is generated when the first incident light beam interacts with particles within the irradiation region of the deposition chamber. The described system may optionally have a processing device coupled to the camera to generate scatter data for a plurality of locations of the illuminated area, where the scatter data for each location includes an intensity of scattered light originating from that location.

An example system is configured to estimate a concentration of an airborne glycol in an environment. The system includes a processor, a display device, a first sensor configured to generate first sensor data representing a concentration of particles in the environment having a diameter less than a threshold diameter, a second sensor configured to generate second sensor data representing a temperature of the environment, and a third sensor configured to generate third sensor data representing a humidity of the environment. The processor is configured to receive the first sensor data, the second sensor data, and the third sensor data; estimate, based on the first sensor data, second sensor data, and the third sensor data, the concentration of the airborne glycol in the environment; and present, using the display device, a visual indication representing the concentration of the airborne glycol in the environment.

The invention relates to a system (101) for discriminating the size of supercooled droplets for an aircraft. The system (101) comprises at least one laser source (103) configured to emit a laser beam (105) and a focusing device (107) for focusing the laser beam (105) in a cloud (109) of supercooled droplets. The laser source (103) is configured to generate an optical feedback interference signal from a reflection of the laser beam (105) in the cloud (109) of supercooled droplets and a processing unit (113) is configured to acquire the interference signal and analyze the variations in amplitude of the interference signal using a convolutional neural network so as to classify the droplets in the cloud (109) according to their size.

The present invention relates to a method and device for analyzing a liquid that may contain an analyte. The analysis method comprises the step of acquiring a digital image of an area to be analyzed, using an imaging device with an optical axis directed towards the area to be analyzed, the digital image being exposed for an exposure time and showing spatial variations in intensity corresponding to a detection pattern when the analyte is present in the sample. The method also comprises the step of processing the digital image with a view to identifying the spatial variations in intensity in the digital image. According to the invention, during at least a part of the exposure time, the medium to be analyzed is placed in a magnetic field, referred to as an "illumination" magnetic field, which is generated by an illumination magnetic source. The illumination magnetic field is located parallel to the optical axis of the imaging device over at least a part of the area to be analyzed.

The present invention relates to a method and apparatus for enlarging particles of an aerosol, and to the use of an agent for generating supersaturated vapor. In the method for enlarging particles (1) of an aerosol (2), the particles (1) are contacted with supersaturated vapor (3). The supersaturated vapor (3) is generated using a sulfoxide or sulfone, such as dimethyl sulfoxide or dimethyl sulfone. These substances are non-flammable, non-hazardous to health, and non-hazardous to the environment, making them easy to handle. They do not cause odor pollution or damage to the climate. The same particle counting efficiency is achieved as with butanol, which is traditionally used as an agent.

In order to solve the technical problem that in the prior art, the water content in soil and the diffusion condition of BOD / COD along with changes of environmental conditions and time cannot be accurately obtained in time, the invention provides an experimental modeling method for the diffusion process of water pollution in the soil, and the method comprises the following steps: establishing an equivalent experimental device for the diffusion process of the water content in the soil and the BOD / COD; the filled soil to be studied is equivalent to the condition of the monitored soil with a certain depth, a plurality of sealed sampling test ports are formed in the cylinder, an artificial channel port capable of sampling is established, the water content and BOD / COD data of sample soil with different depths are collected at different time and different positions, meanwhile, candidate models of the soil water content and BOD / COD diffusion are given, and the soil water content and BOD / COD diffusion are calculated. Error description is given according to the obtained data, and the water content and a BOD / COD model are determined through a system identification method and used for guiding development of agriculture, forestry, animal husbandry, vegetables and fruit industries.

Systems and methods for improved fluid dispensing process control using a machine learning tool are disclosed. In an example method, successive portions of viscous fluid are dispensed by a dispensing device according to operating parameters to train a machine learning tool to associate defect classifications with images of dispensed portions and / or operating parameters associated with dispensing the dispensed portions. The trained machine learning tool is then used in a closed loop fashion in production to detect and correct for defects associated with the dispensed portions to improve quality and production efficiency.