96 results about "Particle scattering" patented technology

The invention relates to the technical field of spectrum detection, and discloses a quality control method for traditional Chinese medicine capsules, which comprises the following steps: continuously scanning by using a micro light spot probe during capsule movement to obtain a spatial spectrum response sequence; performing adjacent micro-area differential operation on the sequence, and filtering a shell background and retaining a particle scattering signal by utilizing a microstructure difference between a capsule shell continuous film and a powder content discrete accumulation; according to the method, a traditional path of a shell standard model is established, through a spatial frequency domain decoupling mechanism, reference errors caused by batch drifting of shell physical attributes are avoided, and the detection sensitivity of trace component fluctuation and foreign matter mixing is improved.

A method of increasing the interference contrast in interferometric scattering optical microscopy. The method comprises providing a particle detection region comprising a chamber or channel having a boundary defined by one or more interfaces, illuminating a particle in the particle detection region with coherent light using an objective lens such that the light is reflected from the interface and scattered by the particle, capturing the reflected light and the scattered light using the objective lens, and providing the captured reflected and scattered light to an imaging device to image interference between the reflected light and the scattered light. The particle is illuminated by coherent light at an oblique angle to the interface.

A method for determining a property of at least one particle in a medium, wherein the method comprises: emitting a coherent light beam to irradiate a sample of the medium; recording an interference image of a first part of the light beam scattered by the at least one particle and a second part of the light beam not scattered by particles; computing, for positions within the sample, an electric field of the first part from the interference image; generating a representation comprising for each position, a phase value determined from the computed electric field and from an estimated electric field of the second part, and an intensity value determined from the intensity of the first part and from the phase value; and determining said property using the representation.

The invention discloses a method for restoring flame shielding imaging based on a large model and a polarization frequency domain network, and the method is characterized in that the method comprises the following steps: 1, building a flame shielding target imaging system, and shooting a clear image of a target object without flame shielding; respectively shooting polarization images of the target object under the conditions of low flame shielding rate, high flame shielding rate and high-intensity flame shielding, and obtaining a low flame shielding rate data set, a high flame shielding rate data set and a high-intensity flame shielding rate data set; according to the restoration method provided by the invention, the problem of serious image degradation caused by strong radiation of flame and scattering of internal particles is effectively solved, and clear imaging of a target behind non-uniform flame shielding is realized. The method is based on an innovative double-branch deep network, and a polarization frequency domain branch accurately separates and extracts submerged target detail information by utilizing the difference between a target and flame in polarization characteristics and combining frequency domain analysis.

The invention discloses an accurate X-ray radiation dose measurement system based on artificial intelligence, which comprises the following steps: acquiring CT image data of a patient and pulse irradiation parameters of radiotherapy equipment through terminal equipment, and calculating a patient specific anatomical structure dynamic influence factor set, a pulse waveform time domain characteristic factor and a tissue interface scattering correction factor; all the parameters are substituted into a dose measurement formula to obtain an accurate X-ray radiation dose value; through a deep fusion image recognition technology (such as a high-resolution anatomical structure, tissue density gradient and heterogeneous region distribution provided by CT / MRI), a secondary particle scattering effect of a junction region of a tumor and a normal tissue can be accurately represented; and dynamic anatomical information (such as respiratory movement and organ displacement) in the image is combined to correct the time characteristic (such as dynamic change under an instantaneous high dose rate) of the pulse radiation field in real time, so that the dose calculation accuracy of a fast algorithm in a complex scene is remarkably improved.

The invention relates to a particle size distribution inversion method based on Bayesian optimization and deep network fusion, and belongs to the technical field of particle detection, and the method comprises the following steps: S1, collecting particle scattering light intensity data, and forming a scattering intensity matrix; s2, establishing a theoretical scattering matrix of particles, generating scattered light field simulation data under different particle size distribution conditions, and finally forming a simulation data set under different particle size distribution conditions; s3, constructing a deep convolutional neural network model, training and updating model parameters by using the simulation data set, and performing preliminary prediction on particle size distribution of particles; and S4, carrying out optimization estimation on the particle size distribution based on a regularization least square method.

The invention relates to a pipeline internal detection system and method based on particle ray detection imaging, and the system comprises a ray source and a plurality of detectors which are circumferentially and uniformly distributed around the ray source at intervals. The plurality of particle scattering rays are formed after a plurality of particle incident rays emitted by the ray source are scattered by the wall of the to-be-detected pipeline during detection. The method has the beneficial effects that the design is reasonable, rapid detection of pipeline wall defects, especially tiny defects, can be realized, the pipeline internal detection precision and defect adaptability are improved, and the technical problem of internal detection of tiny complex defects of the pipeline is solved.

The aggregation state determination method according to the present invention is a method for irradiating a liquid containing particles with laser light and determining the aggregation state of the particles on the basis of the amplitude of change in the light reception intensity of scattered light obtained by scattering the laser light by the particles, and comprises: a correlation acquisition step for acquiring a correlation between the particles and the laser light; obtaining the correlation between the particle size of the particles and the change amplitude of the light receiving intensity; and a determination step for determining the aggregation state of the particles on the basis of the correlation.

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.

The invention relates to an aerosol particle scattering characteristic experimental platform and experimental method based on a Pockels effect, and belongs to the technical field of optical measurement. The experimental platform comprises an optical platform, an aerosol particle transport system, an optical path system and a data processing system, the aerosol particle conveying system comprises a combustion chamber, a dust aerosol generator, a water mist aerosol generator, a pipeline and an aerosol jet hole; the combustion chamber, the dust aerosol generator and the water mist aerosol generator are all placed outside a room where the optical platform is located, and the light path system is placed on the indoor optical platform; all parts of the data processing system are placed inside or on the top of the cabinet, and the cabinet is close to the optical platform. According to the aerosol particle scattering characteristic experiment platform based on the Pockels effect, the electro-optical modulator based on the Pockels effect and the phase-locked demodulation technology are used, the Mueller matrix measurement time can be shortened, and the measurement precision is improved.

To provide an in-vacuum pipe particle monitoring device and an in-vacuum pipe particle monitoring method for widely monitoring particles contained in gas flowing in a vacuum pipe.SOLUTION: A vacuum piping particle monitoring device (1) and a vacuum piping particle monitoring method, which are characterized by having a first pipe (6), a second pipe (2) through which a gas containing particles flows, an intersection (5) where the first pipe (6) and the second pipe (2) intersect, a light film forming means for forming a planar light film (13) inside the first pipe (6), and an observation means (21) for observing scattered light emitted by the particles, wherein the light film (13) is formed so as to cover at least 10% of the cross-sectional area of the second pipe (2) at the intersection (5), and the scattered light is emitted by the particles coming into contact with the surface of the light film at the intersection (5).SELECTED DRAWING: Figure 2

A particle analysis device includes: an acquiring unit to acquire a multi-viewpoint image obtained by synthesizing captured images of a lens array on which an image of light from a particle irradiated with light are formed via a main lens, the captured images being captured simultaneously from mutually different viewpoints by a plurality of cameras; a sensing unit to sense a light intensity pattern of scattered light scattered from the particle on the basis of the multi-viewpoint image acquired; an analyzing unit to analyze a scattering solid angle of scattered light relative to an optical axis of the main lens as a center on the basis of the light intensity pattern of the scattered light sensed; and a calculating unit to calculate a molecular weight and particle size of the particle on the basis of the scattering solid angle of the scattered light analyzed.

The invention is suitable for the technical field of display, and provides a display panel, a manufacturing method and a display device.The display panel comprises a substrate, an isolation structure, a plurality of light-emitting devices and a scattering layer; wherein the isolation structure is arranged on one side of the substrate, an isolation opening is defined by the isolation structure, the light-emitting device is arranged in the isolation opening, the scattering layer comprises a plurality of scattering structures, the scattering structures are arranged in the isolation opening and located on the side, away from the substrate, of the light-emitting device, and each scattering structure comprises a base layer and scattering particles doped in the base layer. The scattering particles of the scattering structure can carry out multi-angle scattering on the light entering the base layer, the large-angle light emitting rate of the light emitting device is increased, the light extraction rate and the visual angle of the display panel are improved, and the problem of large-visual-angle color cast is avoided.

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.

The present application relates to the technical field of spectral detection, and discloses a quality control method for traditional Chinese medicine capsules, comprising: acquiring a spatial spectrum response sequence by continuously scanning with a micro-spot probe in capsule movement; performing adjacent micro-area difference operation on the sequence, filtering out the shell background and retaining the particle scattering signal by using the microstructure difference between the continuous film of the capsule shell and the discrete accumulation of the powder content; and calculating the statistical dispersion of the difference sequence to construct a fluctuation fingerprint feature and perform qualification determination. The present application establishes a traditional path of the shell standard model, avoids the reference error caused by the batch drift of the physical properties of the shell through a spatial frequency domain decoupling mechanism, and improves the detection sensitivity of the fluctuation of trace components and the mixing of foreign matters.

The invention discloses a HSRL seawater backscattering inversion method based on a vertical deviation model, comprising: obtaining a particle scattering signal and a molecular scattering signal simulated by a HSRL system; calculating the backscattering directly detected by the HSRL, and calculating the backscattering vertical deviation according to the backscattering true value input by the simulation; obtaining a vertical deviation model according to system parameters, environmental parameters and the backscattering vertical deviation; processing near-water surface data, calculating the backscattering near-water surface value not affected by multiple scattering, and estimating the scattering coefficient near-water surface value in combination with the particle backscattering ratio; calculating the vertical deviation at different depths based on the vertical deviation model; and inverting the backscattering profile according to the obtained vertical deviation profile. The invention overcomes the HSRL seawater backscattering inversion error caused by multiple scattering, and significantly improves the detection accuracy of the ocean HSRL.

The invention provides a laser projection observation device, and relates to the technical field of suspended particle projection. A laser beam emitted by a laser device is combined with a particle suspension technology realized by a suspension device, and an amplification module is introduced to amplify particle scattered light to form a dynamic real-time image on a projection curtain, so that the problem that in the prior art, no lossless and non-contact in-situ real-time observation on suspended particles is available is solved; the objective of providing a clear, large-size and real-time dynamic observation effect is achieved.

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.

The invention provides a brightness temperature simulation calculation method conforming to a radiation transfer theory. The method comprises the following steps: establishing a radiation transfer model based on a radiance Stokes vector in a (Il, Ir, U, V) T form; collecting radiance simulation parameters; if the radiation transmission model is a scalar radiation transmission model, the atmospheric thermal radiation is a vector radiation transmission model, and if the radiation transmission model is a vector radiation transmission model, the atmospheric thermal radiation is obtained by calculating atmospheric particle scattering phase function information, atmospheric single scattering albedo, surface reflectance information and surface emissivity according to radiance simulation parameters; substituting the radiance simulation parameter, the atmospheric thermal radiation, the atmospheric particle scattering phase function information, the atmospheric single scattering albedo, the surface reflectance information and the surface emissivity into a radiation transmission model for calculation to obtain a radiance simulation result; and converting the simulation result of the radiance into the brightness temperature. The invention further provides a brightness temperature analog calculation device and equipment and a storage medium. The brightness temperature simulated by the method is consistent with a theoretical value.

The invention discloses a decoupling cooperative enhancement method for an underwater image degradation factor, and belongs to the technical field of underwater image enhancement. Aiming at the problem that an underwater imaging environment is complex and changeable, and light propagation is influenced by wavelength selective absorption and suspended particle scattering to cause image degradation, a degradation factor is approximately decomposed into relatively independent scattering degradation and color cast degradation, and a binarization strategy is introduced to compress the storage and calculation amount of data, so that the image degradation is realized. And global information is compensated in back propagation through decoupling learning, and data compression precision loss is recovered. According to the decoupling collaborative optimization method, scattering and color problems are distributed to a physical compensation module and a spectrum compensation module, learning information is isolated through a gating mechanism, and degeneration decoupling is achieved; the loss function is combined with the subtasks and the global loss to compensate the binarization precision loss of the submodules, and finally, the modules are cascaded to process and recover the degraded image.

The invention relates to an optical fiber direct feed type online detection device for particles in vacuum. The optical fiber direct feed type online detection device comprises a vacuum chamber, a laser generation and feed-in component, a laser shaping component, a particle detection and signal acquisition component, a vacuum unit and a to-be-detected cavity, the side wall of the vacuum chamber is provided with a laser feed-in and signal lead-out sealing interface, and two ends are respectively connected with the vacuum unit and the to-be-tested cavity in a sealing manner; the laser source is externally arranged in the vacuum cavity, and laser is directly fed into the cavity through the transmission optical fiber; the laser shaping component shapes laser in the cavity to form a detection area; the particle detection and signal acquisition part comprises a filtering element, a photoelectric detection element and a residual laser absorption element, the photoelectric detection element is used for receiving a particle scattering signal, and the signal is led out through the sealing interface. According to the optical fiber direct feed type online detection device for the particles in the vacuum, external beam expansion is not needed, external light path interference, vacuum window reflection and visible light noise are avoided, and stable real-time online monitoring of the particles in the vacuum is achieved.

The invention discloses a single-camera three-dimensional particle tracking velocity measurement method and system based on a double-helix point spread function. The test method comprises the following steps: exciting tracer particles in a flow field to be measured; performing double-helix phase modulation on the particle scattered light; calibrating the angle-depth relation of the double-helix particles; collecting an original image sequence of flow field particles; performing three-dimensional particle field reconstruction on the original image sequence; carrying out three-dimensional particle velocity field solving on the three-dimensional particle field; and outputting a high-precision three-dimensional velocity field. According to the test method, double-helix phase modulation is carried out on particle scattered light, the depth of particles is determined through angle information of two modulated lobes, particle three-dimensional positioning of a single camera is achieved, and then three-dimensional flow field particle tracking speed measurement of the single camera is achieved. Compared with a single-light-field camera three-dimensional particle tracking velocity measurement technology, the spatial resolution is improved. Compared with a three-hole mask three-dimensional particle tracking speed measurement technology, the light utilization rate is improved. The method is suitable for high-precision speed measurement of a three-dimensional flow field.

The invention provides a semi-automatic live fish culture PIV shooting integrated device and method, and belongs to the technical field of flow field visualization tests.In a live fish culture system, a filtering device and a heating device are arranged to provide a suitable living environment for shot live fish objects, and in the shooting preparation process, the filtering device and the heating device are arranged in the live fish culture system; the ROS control system is used for controlling the range control device to adjust the position of the calibration plate through a computer, calibration work is completed in the living environment of a shot object, particles are scattered through a hole-shaped structure above the device, and after preparation is completed, calibration is completed. Continuously controlling the range control device through the computer to accurately adjust the limiting plate according to scales on the range adjusting groove so as to control the shooting range, and synchronously controlling the laser and the high-speed camera to complete the shooting process by using the computer. The moving range of live fishes is limited by controlling the limiting plate and the movable top plate, camera calibration and particle scattering work of PIV shooting are completed at the same time, and the PIV shooting process is achieved on the premise that the living environment of a shot object is not changed.

Provided is a particle analysis device 30 comprising: an acquisition unit (31) that acquires a multi-viewpoint image obtained by compositing captured images which are obtained when a plurality of cameras (17) simultaneously capture, from mutually different viewpoints, images at a lens array (16) in which light from a particle that has been irradiated with light forms an image via a main lens (15); a detection unit (32) that detects, on the basis of the multi-viewpoint image acquired by the acquisition unit (31), a light intensity pattern of scattered light which has scattered from the particle; an analysis unit (33) that analyzes, on the basis of the light intensity pattern of the scattered light detected by the detection unit (32), a scattering solid angle of the scattered light about an optical axis of the main lens (15); and a calculation unit (34) that calculates, on the basis of the scattering solid angle of the scattered light analyzed by the analysis unit (33), a molecular weight and a particle diameter of the particle.

A module includes one or more focusing optics, a flowcell configured to receive one or more particles, a collimated laser configured to shine a beam of light through the one or more focusing optics onto the flowcell, wherein the one or more focusing optics is configured to provide a beam of light from the collimated laser that overfills a width of the flowcell a side scatter optical train which includes one or more optics and one or more side scatter detectors, wherein the one or more side scatter detectors are configured to receive light scattered by the one or more particles, a forward scatter optical train which includes a forward scatter mask, one or more optics, and one or more forward scatter detectors, wherein the one or more forward scatter detectors are configured to receive the scattered light.

The present invention provides an apparatus for characterising particles using nanoparticle tracking analysis (NTA). The apparatus comprises: a flow cell for containing a sample comprising a plurality of particles suspended in a fluid; a pump configured to provide a flow of the sample through the flow cell; a light source configured to illuminate the sample; an imaging system configured to collect light scattered or fluoresced by particles moving within the flow cell and within a detection region of the imaging system, and capture a video of the particles moving within the detection region; and a computer configured to process the video. The computer is configured to determine an estimated flow velocity of the sample through the flow cell. Determining the estimated flow velocity comprises performing 1-dimensional particle tracking in a direction perpendicular to an expected flow direction of the sample.

The application discloses a construction method of anti-skid paint, which comprises the following steps: when it is detected that the anti-skid coating after the finish coating construction is in a semi-dry state, performing several times of anti-skid particle scattering on the anti-skid coating; after each time of anti-skid particle scattering is completed, performing scattering uniformity detection on a target area covered by the current time of scattering; if the detection result is lower than a preset uniformity threshold, improving the scattering mode of the next time of anti-skid particle scattering according to the detection result; performing the next time of anti-skid particle scattering according to the improved scattering mode, until the detection result of the next time of anti-skid particle scattering is not lower than the preset uniformity threshold, or until the anti-skid coating completes the anti-skid particle scattering. The scattering uniformity detection step can be introduced to improve the construction of the anti-skid paint, so that the problem that the anti-skid effect of the anti-skid paint is poor in a high-humidity environment is solved, the anti-skid effect of the anti-skid paint is improved, and thus the application demand with a higher anti-skid effect requirement can be met.

This invention relates to a continuous three-dimensional particle field reconstruction method based on single-light-field imaging using EM deconvolution, belonging to the field of optical imaging technology. This method employs a light field camera to capture light field images of a discretized three-dimensional flow field, acquiring the light intensity information of scattered light emitted by particles on each pixel of a CCD detector. Based on the light intensity information, a weight matrix for each voxel is calculated, and the entire weight matrix is ​​loaded only once. The nth frame of the light field image is loaded, and the non-zero pixels in the nth frame are identified. The non-zero pixel sequence formed by the scattered light from tracer particles is extracted. An EM deconvolution algorithm is used to iteratively calculate the non-zero pixel sequence, updating the intensity of each voxel, thereby reconstructing the three-dimensional particle field of a single frame. The above steps are repeated to complete the reconstruction of the three-dimensional particle field from multiple frames of high temporal resolution light field images, resulting in higher reconstruction accuracy and consistency, and less time consumption.

A gas detection method using surface-enhanced Raman spectroscopy (SERS) according to the present invention may comprise the steps of: (a) vertically forming a plurality of nanowires on a base substrate; (b) depositing metal nanoparticles on the nanowires to manufacture a SERS substrate having a three-dimensional structure; (c) cooling the manufactured SERS substrate to condense an analyte gas on the SERS substrate; (d) irradiating the condensed analyte gas particles with excitation light and detecting light scattered from the analyte gas particles; and (e) analyzing the detected light to detect the analyte gas.

The invention discloses an early warning device and method based on continuous light and heat release particle scattering intensity monitoring, and the device comprises a continuous light source module which is used for outputting a stable and continuous initial laser beam based on a semiconductor laser; the light confinement gathering module is used for gathering the initial laser beam into a main laser spot through a lens and diffracting the main laser spot for light collection to obtain a scattered light signal; the scattered light detection module is used for collecting scattered light signals in real time through a photoelectric detector array and converting the scattered light signals into electric signals; the signal processing and early warning module is used for carrying out filtering processing on the electric signal based on a multi-stage filtering mode to obtain a filtered electric signal; according to the filtered electric signals, extracting signal features by adopting a wavelet transform method; and on the basis of the signal characteristics, the particulate matter concentration trend is judged by combining a preset dynamic threshold model, and multi-stage early warning triggering is carried out. According to the invention, high sensitivity and strong anti-interference capability are realized, and continuous dynamic monitoring is supported.