50 results about "Fiber probe" patented technology

The invention relates to the technical field of medicine quality detection, and particularly discloses an optical detection method and system for the content of vitamin tablets. The method comprises the following steps: driving an optical fiber probe array to carry out three-dimensional multi-angle near-infrared scanning through a multi-axis mechanical arm, and collecting reflection spectrum data; a weighted spectrum is generated through derivative spectrum analysis and double evaluation, and auxiliary material noise is corrected and separated in combination with subspace projection and a dynamic kernel function; performing spectral vector projection and regression coefficient iterative optimization through an online PLS model, and synthesizing an error coefficient based on a four-level index retrieval standard library to perform dual-channel feedback; and finally, fusing the credibility weight to output a detection result of the binding confidence. The method realizes nondestructive and high-precision detection of the vitamin tablets, has the beneficial effects of multi-dimensional data fusion, dynamic error compensation and high model adaptability, and remarkably improves the detection accuracy and reliability.

This invention belongs to the field of laser cladding detection technology, specifically relating to a method for extracting and analyzing spectral signal features during the cladding process of PDC drill bits. The method includes: acquiring a real-time plasma spectral sequence of the PDC drill bit cladding process using a fiber optic probe and spectrometer; obtaining spectral line effectiveness weights based on the intensity and signal-to-noise ratio of characteristic spectral lines in the plasma spectral sequence; obtaining elemental fusion state indices based on the spectral line effectiveness weights, the intensity of hard phase spectral lines, and the intensity of binder phase spectral lines; obtaining cladding quality stability based on the elemental fusion state index and plasma electron density fluctuations; and determining cladding defects in the PDC drill bit based on the cladding quality stability. This invention effectively suppresses the interference of strong background noise on the monitoring results by integrating spectral signal-to-noise ratio weights and electron density fluctuation characteristics, thus improving the accuracy of detecting component segregation and thermodynamic instability in the cladding layer.

A system includes a light source configured to emit treatment light and an optical coherence tomography (OCT) device. The system further includes a surgical instrument including a distal portion configured to be inserted into an eye of a patient. An optical fiber is coupled to the light source and to the OCT device and (a) conducts the treatment light along the distal portion to be emitted from a tip of the distal portion and (b) conducts detection light from the OCT device along the distal portion to be emitted from the tip of the distal portion and conduct a reflected portion of the detection light to the OCT device. A controller obtains image data from the OCT device and operates the light source per the image data, e.g., selects a number of pulses for the treatment light based on a thickness of a trabecular meshwork apparent in the image data.

The application provides a conical double-clad fiber probe integrated with photoacoustic excitation and detection, which integrates pump light excitation and detection light sensing through a conical double-clad fiber, integrates functions such as photoacoustic excitation, gas-light interaction and interference detection in a micro probe, effectively simplifies the device structure, reduces the volume, and significantly improves the integration and compactness. At the same time, the conical part of the conical double-clad fiber can realize lateral diffusion of pump light, so that it can fully act on the measured gas in the closed gas chamber without additional configuration of optical components such as mirrors, and the problem of weak photoacoustic signal in a small space is improved. In addition, the application uses a fiber Fabry-Perot interference structure to complete vibration detection with a polyimide diaphragm, replacing the traditional electronic detector, having excellent anti-electromagnetic interference capability, and can accurately identify weak vibration signals, effectively improving the sensitivity and operation stability of gas detection.

To make it easy to confirm the orientation of the protective window. [Solution] A method for inspecting the surface orientation of the first surface of an optical temperature sensor comprising a cylindrical fiber probe through which an optical fiber is inserted, and a protective window portion made of sapphire and located on the tip side of the fiber probe, wherein the surface of the protective window portion opposite to the optical fiber in the axial direction of the fiber probe is formed as the first surface and the surface on the optical fiber side is formed as the second surface, wherein coaxial incident illumination is shone on the first surface.

The present invention provides a light radiating fiber probe that can emit light with high beam quality in a direction inclined relative to an axial direction of an optical transmission cable. A light radiating fiber probe 1 is mounted in medical equipment for treatment, and includes: an optical transmission cable 10 through which light emitted from a light source is transmitted; and a light refracting unit 20 provided on a leading end 13 side of the optical transmission cable 10 and refracting, via two or more refracting surfaces 21, laser light L emitted from the optical transmission cable 10 to emit light inclined by a predetermined angle or larger relative to an axial direction X of the optical transmission cable 10.

The invention discloses a spectral measurement device and method for dynamically and controllably applying force and temperature. The device comprises a base, a liftable platform, a sample fixing device, a force loading kit, a heating plate, a heat preservation component and a spectrum acquisition system. The force loading suite can apply a periodic mechanical load with stable amplitude through eccentric transmission and force feedback control; the optical fiber probe is coaxially arranged along the hollow loading component to realize high matching of loading and a spectrum acquisition path; the sample fixing device and the heating plate are matched with the heat preservation component to form a constant-temperature light-proof environment, so that stable test conditions are provided. The problems that in the prior art, mechanical loads are difficult to load stably, temperature distribution is uneven, and spectrum collection is prone to being interfered are solved, synchronous, stable and high-fidelity collection of luminescent spectrums under the dynamic coupling condition of force and temperature is achieved, repeatability and reliability of test results are improved, and the method is suitable for popularization and application. The method is suitable for dynamic spectrum collection under the multi-field coupling condition.

A multifunctional fiber probe capable of optical, electrical, and chemical interrogation of neuronal brain circuits in vivo is disclosed. The fiber probe may include an optical waveguide to enable optogenetic stimulation and / or fiber photometry, one or more electrodes for electrical recording and / or stimulation, and a microfluidic conduit to deliver at a drug, a gene, and / or a chemical to a mammalian subject. The fiber probe may be MRI compatible. The fiber probe may have a minimal footprint and enhanced bio-compatibility due to its flexible materials, resulting in reduced inflammation relative to conventional deep brain stimulation probes. The fiber probe may allow for multisite optical, electrical, and viral perturbations and electrophysiological and photometric recordings.

The invention relates to the technical field of needle point enhanced nanometer spectrum, in particular to a chiral plasmon optical fiber probe, a preparation method thereof, a nanometer spectrum enhancement method and a nanometer spectrum enhancement system. The surface of the conical area of the probe is of a chiral spiral structure and is used for converting exciting light transmitted in the optical fiber into a nano focusing field at the tip of the probe, and the surface of the conical area of the probe is plated with a metal film; the chiral plasmon optical fiber probe provided by the invention can actively construct a plasmon nanocavity structure with an extremely strong electric field gradient with a single crystal substrate sample under the control of a scanning tunneling microscope; a strong gradient field in the nano-cavity structure can be efficiently coupled with electric quadrupole moment, magnetic dipole moment and the like of molecules, so that a transition state belonging to selection rule forbidden ring in a conventional Raman spectrum is effectively excited, and the technical bottleneck that a traditional TENS cannot detect high-order transition due to insufficient electric field gradient is broken through; and a more reliable technical means is provided for completely analyzing the molecular structure and the energy level characteristics.

Sampling optics for spectroscopic analysis include an array of optical elements as opposed to a single objective as used in conventional systems, achieving enhanced collection, inherent signal integration / averaging and improved measurement uniformity. At the same time, the etendue using the array is substantially the same as the etendue using a single-element objective. The array of closely packed optical elements may have spherical or aspherical surfaces and may be transmissive or reflective. An array of lenses and reflective elements may be arranged together in flow cell configurations and / or for signal amplification involving multiple passes through a sample medium. The array elements may be arranged in hexagonal, linear, radial or other packing geometries and may be implemented as a flat or curved panel. The present disclosure is applicable to remote fiber probes and flow cell geometries to measure solids, liquids, gasses and semi-liquid such as slurries.

The invention provides a novel micro-structure polymer optical fiber tetracycline sensor based on C3N4-MIL-53 sensitive material modification, which can realize low-cost, high-sensitivity and rapid detection of tetracycline concentration in water. The optical fiber probe is characterized in that the optical fiber probe is composed of a side-cast area and a microgroove area, and the surface of the side-cast area is sequentially coated with a layer of Canadian resin and a C3N4-MIL-53 sensitive film. Through the microgroove structure, most of light transmitted by the optical fiber can be concentrated in a specific angle range for transmission, so that the intensity of evanescent waves is effectively enhanced, and the sensitivity of the sensor is improved. The C3N4-MIL-53 sensitive material is adopted for modification, and the specific adsorption effect of the C3N4-MIL-53 sensitive material on tetracycline is utilized, so that the rapid, high-sensitivity and high-selectivity detection function of the sensor on the concentration of tetracycline in water is realized.

An optical temperature sensor includes a cylindrical fiber probe into which an optical fiber is threaded, and a protective window that is formed of sapphire and positioned on the distal end side of the fiber probe. The surface of the protective window opposite to the optical fiber in the axial direction of the fiber probe is formed as a first surface, the surface of the protective window facing the optical fiber is formed as a second surface, and the first surface is an a-face of the sapphire.

A kind of tip timing method and device based on laser Doppler effect, for realizing fiber tip timing;The method comprises the following steps: step S1, laser is sent out, through fiber beam splitter and laser is divided into first light beam and second light beam;Step S2, first light beam is irradiated to blade tip by temperature-resistant fiber probe, and the laser reflected by blade tip is received, signal light participating in interference is formed, and is sent to fiber combiner;Step S3, second light beam is sent to fiber combiner, and reference light participating in interference is formed;Step S4, signal light and reference light interfere to form interference light field, and the electrical signal of interference light field is acquired;Step S5, blade tip time ti is obtained according to electrical signal;And a kind of tip timing device based on laser Doppler effect, the blade tip time of the blade tip of the engine blade in the engine casing of engine is measured.The present application has the advantages of accurate measurement and high engineering applicability.

The application provides a fluorescence microscopic endoscopy system and method capable of adjusting liquid inflow and concentration in real time, and belongs to the field of microscopic imaging. The system comprises an integrated image transmission fiber probe (integrated liquid inflow channel and image transmission fiber bundle), a double-channel electric infusion unit (stain pump and diluent pump), an optical path control module (switchable filter and wide spectrum light source), and an image feedback module. A high-sensitivity camera is used to collect fluorescence images, and a main control board dynamically adjusts the concentration (mixed stain and diluent ratio) and spraying amount of the stain based on image brightness / contrast features, thereby solving the problems of traditional split-type operation complexity, uncontrollable stain amount, and poor imaging quality. Advantages include: single insertion for spraying and imaging, shortening detection time; image feedback closed-loop control improves staining accuracy; and expandable multi-spectral imaging. The application is suitable for early cancer screening of the digestive tract and significantly improves lesion recognition rate.

A fibre-optic probe cap 210 for a fibre-optic probe 200 comprising at least one excitation fibre 220 for outputting illumination radiation and at least one collection fibre 230 for collecting radiatio

A temperature sensor used in a molding machine includes: a tubular fiber probe into which an optical fiber is threaded; an outer casing having a shaft into which the fiber probe is inserted; a protective window that is located on a distal end side of the fiber probe and is formed of glass; and a spacer that is disposed between the fiber probe and the protective window and has a space section both sides of which are in contact with the fiber probe and the protective window. The space section has a transmission hole formed to serve as a path leading infrared light to the optical fiber, and a diameter of the transmission hole is equal to or greater than an outer diameter of the optical fiber.

The utility model provides a hydrogen peroxide production catalyst activity real-time monitoring and regulating device which comprises a hydrogenation tower, the outer side face of the hydrogenation tower is fixedly connected with a liquid conveying pipe, the liquid conveying pipe is communicated with an outer liquid distribution pipe in a regulating assembly, the inner side face of the outer liquid distribution pipe is fixedly connected with an inner liquid distribution pipe through a middle liquid distribution pipe, and the lower surface of the middle liquid distribution pipe is symmetrically connected with spray heads. The upper surface of the middle liquid distribution pipe is fixedly connected with an optical fiber probe, and the temperature measuring assemblies are symmetrically connected into the fixed bed layer and composed of an upper fixing plate, a lower fixing plate, an outer protective shell, a middle protective shell, an inner protective shell and a temperature sensor. Through cooperation of the regulation and control assembly, the temperature measurement assembly and the optical fiber probe, the device can correspondingly monitor a working solution and a fixed bed layer in the hydrogenation tower in real time, so that accurate data of the activity of a catalyst in the fixed bed layer can be obtained, the sensitivity of regulation and control of the activity of the catalyst can be improved, and the working efficiency is improved. The production efficiency of hydrogen peroxide is improved.

The application relates to an acid-proof scintillation fiber detector which comprises a detector shell, a plane cover plate arranged in the detector shell, a photoelectric detector arranged at the top of the plane cover plate, a detector electronic unit connected with the photoelectric detector, a fiber collimation coupling body connected with one end of the photoelectric detector, a detector bottom frame arranged at the bottom of the plane cover plate, a light shielding film arranged in the detector bottom frame, a scintillator arranged at the top of the detector bottom frame, a fiber fixing frame arranged at the top of the scintillator, a plurality of scintillation fibers arranged in a U-shaped mode on the fiber fixing frame, the end portions of the scintillation fibers penetrating through the plane cover plate and being connected with the fiber collimation coupling body, a light guide arranged at the top of the fiber fixing frame, a light reflection layer arranged at the top of the light guide, and the top surface of the light reflection layer being connected with the bottom surface of the plane cover plate. The detector can work in a strong oxidizing acid environment for a long time, and can avoid the problem of the detector size being too long in a single direction while meeting the requirements of the detection efficiency and the detection sensitive area.

The application discloses a tumor detection device and method based on a diamond quantum sensor, and belongs to the technical field of biomedical detection. The device comprises a fiber laser, a fiber beam splitter, a fiber attenuator, a fiber ring, a filter, two photodetectors, a differential amplifier, an electronic filter, a computer, a signal generator, two microwave antennas and a fiber probe. The fiber probe comprises a fiber packaged in a plastic shell, a diamond quantum sensor containing NV color centers fixed at the end of the fiber, and a first microwave antenna integrated beside the fiber. The laser excites the diamond to generate fluorescence, and the signal generator drives the two microwave antennas to apply a microwave field. The dielectric properties of the sample to be measured will modulate the fluorescence intensity of the diamond by affecting the microwave field. The laser noise is eliminated through differential amplification and filtering technology, and the computer analyzes the fluorescence signal change to reconstruct the dielectric constant distribution of the sample, realizing non-invasive and high-sensitivity detection of tumors.

The present application relates to a kind of automobile interior atmosphere lamp color calibration methods based on multi-channel fiber synchronous acquisition, color calibration is carried out by the measuring system of two-stage calibration, wherein two-stage calibration includes first stage: under the same geometric condition, the same region of the N fiber probes is simultaneously aligned with a uniformity standard light source, the original spectral signal of each channel is synchronously collected, the relative spectral response correction coefficient of each channel relative to reference channel is calculated based on the signal;Second stage: select a standard transfer light source measured, and using any one specified fiber probe calibrated by the first stage, under standard geometric conditions, the standard transfer light source is aligned and collected, to obtain the original signal;Combined with the known absolute spectral radiance value of the standard transfer light source and the corresponding, the absolute spectral responsivity function of the entire system is calculated.The present application can multi-channel synchronous acquisition, and greatly shorten the measurement time.

The application discloses a kind of high liquid limit fly ash roadbed compaction quality intelligent dynamic regulation methods, the mapping relationship of high liquid limit fly ash hyperspectral characteristics and specific surface area index, total amount of hydroxyl and moisture content is established by first neural network model, second neural network model establishes optimal moisture content prediction model, and the correlation of compaction degree and dielectric constant, stiffness, moisture content is constructed by third to fifth neural network model;Through fiber probe and unmanned aerial vehicle hyperspectral imaging, the moisture content of yard and paving layer is two-stage regulated, and pre-wetting and secondary accurate regulation are carried out in combination with intelligent spraying system;In the compaction stage, data is collected in real time by multi-frequency ground penetrating radar and vibration sensor, compaction degree distribution is inverted and stratified evaluation is carried out, and rolling parameters are dynamically adjusted.The application integrates hyperspectral technology, multi-source sensing and deep learning, realizes the intelligent management of compaction quality, and significantly improves the uniformity and quality stability of fly ash roadbed construction.

The application provides a multi-directional velocity sensing micro multi-core optical fiber probe and a multi-directional velocity measuring device, and belongs to the technical field of laser detection and velocity measurement. The device comprises a continuous light source, a first optical splitter, a pulsed light source, a modulator, a first optical wavelength division multiplexer, n optical circulators, a multi-core optical fiber fan-in and fan-out device, a probe, a second optical wavelength division multiplexer, an axial photoelectric detector, a second optical splitter, and m radial photoelectric detectors. By combining the cores at different positions in the probe, multiple velocity information acquisition channels can be formed. The probe is composed of m radial core groups, the total number of cores is n, the m straight lines where the radial core groups are located intersect the axis of the No. 1 core, the No. 1 core is used for axial sensing, the radial core groups are used for axial sensing, the axial photoelectric detector and the radial photoelectric detector are used for outputting signals to an upper computer, and the upper computer calculates the axial and radial velocities according to the calculation requirements. The application realizes the synchronous velocity measurement in multiple directions.

The invention belongs to the technical field of laser cladding detection, and particularly relates to a spectral signal feature extraction and analysis method for a PDC drill bit cladding process, and the method comprises the steps: obtaining a real-time plasma spectrum sequence of the PDC drill bit cladding process through an optical fiber probe and a spectrometer; obtaining a spectral line effectiveness weight according to the intensity and the signal-to-noise ratio of a characteristic spectral line in the plasma spectrum sequence; obtaining an element fusion state index according to the spectral line effectiveness weight, the hard phase spectral line intensity and the binding phase spectral line intensity; the cladding quality stability is obtained according to the element fusion state index and the plasma electron density fluctuation; and performing cladding defect judgment on the PDC drill bit according to the cladding quality stability. According to the method, the spectral signal-to-noise ratio weight and the electron density fluctuation characteristics are fused, so that the interference of strong background noise on a monitoring result is effectively inhibited, and the accuracy of cladding layer component segregation and thermodynamic instability detection is improved.

The invention provides a multi-mode optical fiber speckle imaging and distance measuring system and method, and relates to the technical field of imaging and distance measuring, and the system comprises an optical fiber coupler which is used for coupling an illumination light field emitted by a coherent light source into a multi-mode optical fiber probe, and enabling the illumination light field to irradiate a measured target through the multi-mode optical fiber probe; the multi-mode optical fiber probe is used for receiving the signal light field reflected by the measured target into the multi-mode optical fiber and outputting a speckle field through the multi-mode optical fiber; the area array image sensor is used for sending the speckle field to the data image processing module; and the data image processing module is used for calculating the detection distance of the detected target and reconstructing the image information of the detected target based on the speckle field output by the multimode optical fiber. According to the multimode optical fiber speckle imaging and distance measuring system and method, a lens-free illumination and detection integrated structure is adopted, the integration level and flexibility of the system are remarkably improved, and meanwhile high-precision imaging and distance detection are achieved through a speckle light field of compressed sampling.

The invention provides an optical fiber temperature sensor based on a fluorescence intensity ratio, which comprises a multimode optical fiber, one end of the multimode optical fiber is reserved with a detection section which only retains a fiber core and a cladding, and the cladding of the detection section is wrapped with a fluorescent material layer by adopting a UV glue curing method to form an optical fiber probe, the specific preparation method comprises the following steps: S1, stripping a protective layer and a coating layer on the surface of one end of the multimode optical fiber to expose a fiber core and a cladding; s2, preparing a fluorescent material into powder, and uniformly mixing the powder with the UV glue; and S3, dipping the detection section in a fluorescent material, and carrying out ultraviolet irradiation curing. The invention provides an all-fiber temperature measuring device based on the fluorescence intensity ratio. The all-fiber temperature measuring device comprises a laser, a splitter, an optical power meter, a spectrograph, an upper computer and the optical fiber temperature sensor based on the fluorescence intensity ratio. The device is high in durability, small in measurement error, and good in stability, repeatability and real-time dynamic response capability.

The application relates to the technical field of magnetic field detection, in particular to a magnetic shielding cavity residual magnetic field strength measuring device and method, which comprises a probe tube, a detection system, a stabilizing system and a data processing terminal, the probe tube can be telescoped and rotated, the detection system is fixedly installed on the probe tube, the stabilizing system is arranged outside the probe tube and is used for offsetting the gravity moment of the probe tube and feeding back the tilting state of the probe tube in real time, and the data processing terminal realizes data interpolation and residual magnetic field cloud map generation in the magnetic shielding device. In the method, the carbon fiber probe tube is inserted through a magnetic shielding cavity cover plate, a support frame is adjusted and locked, then the probe tube is telescopically adjusted stage by stage, the probe tube is rotated after each telescopic adjustment, magnetic field data of each point is recorded, spatial coordinates of each measuring point are calculated by combining a probe tube scale and a rotation angle, a three-dimensional residual magnetic field cloud map is generated by using a radial basis function interpolation method, the cloud map distribution is analyzed, a shielding weak area is located, and structure optimization is guided.

An inherent fluorescence early tumor diagnostic apparatus comprises a diagnostic apparatus body and a light source unit, the light source unit is arranged in the diagnostic apparatus body, the light source unit comprises a shell, a light emitting part, a heat dissipation part, a light filtering part, a light gathering part and a light reflecting part, cooling water in a water tank is pumped into a heat conduction pipe by arranging the heat dissipation part and starting a pump body, heat of a high-pressure mercury lamp is taken away, and the heat of the high-pressure mercury lamp is dissipated. Excitation light generated by the high-pressure mercury lamp is reflected to the light gathering part through the light reflecting part, the light is focused by the light gathering part and then enters the light filtering part, and finally the fluorescence excitation light is conducted to a focus part by an external light-guide fiber probe, so that a diagnosis effect is achieved, and long-time non-stop work can be realized.

A multifunctional fiber probe capable of optical, electrical, and chemical interrogation of neuronal brain circuits in vivo is disclosed. The fiber probe may include an optical waveguide to enable optogenetic stimulation and / or fiber photometry, one or more electrodes for electrical recording and / or stimulation, and a microfluidic conduit to deliver at a drug, a gene, and / or a chemical to a mammalian subject. The fiber probe may be MRI compatible. The fiber probe may have a minimal footprint and enhanced bio-compatibility due to its flexible materials, resulting in reduced inflammation relative to conventional deep brain stimulation probes. The fiber probe may allow for multisite optical, electrical, and viral perturbations and electrophysiological and photometric recordings.

The invention discloses a PRLIBS signal acquisition visual angle adjustment controller, relates to the technical field of PRLIBS signal acquisition, and aims to solve the problems that an existing device is inaccurate in angle adjustment, cannot visualize the angle and lacks precision verification means. The controller comprises an incident light module, a rotation angle control module, a prism rotation module and an emergent light module which are assembled in a shell and are sequentially arranged along a spectral signal transmission path. The incident light module focuses plasma point source diffusion light intensity into parallel spectral signals through a 30mm focusing lens; the rotation angle control module is composed of a controller, an angle display screen, a power source, an angle adjusting button, a stepping driver and a rotating motor, and accurate angle adjustment and visual display are achieved. The prism rotation module adopts worm and worm wheel transmission to drive the polarization separation module containing the Glan-Thomson prism to rotate, and the equipped front and back dials can verify the adjustment precision; and the emergent light module focuses the polarized and separated signal to the optical fiber probe through a 100mm focusing lens. The device is reasonable in structural design, high in angle adjustment precision, good in visualization effect, capable of effectively improving the light intensity stability of characteristic peaks of heavy metal elements in spectral signals and suitable for PRLIBS signal acquisition scenes.

This invention relates to a femtosecond laser deposition probe and a micro / nano localized deposition device based on a femtosecond laser, which relates to the field of nanofabrication, specifically to the field of surface metallization process equipment technology and the field of probe technology used in this process. It solves the problems of existing probes being unable to simultaneously excite electrochemical reactions and conduct laser light, and the high optical path transmission loss in existing deposition devices. The probe comprises multiple parallel single-mode silica optical fibers, each fiber having a tapered end and its outer surface covered with a metal layer. The laser emitted by the femtosecond laser transmission system in the deposition device is guided by the fiber probe (301) to the surface metallization processing area within the movable reaction pool system (4), and the end of the fiber probe (301) also serves as the working electrode for the chemical reaction within the movable reaction pool system (4). The femtosecond laser deposition probe is suitable for systems combining laser and chemical reactions.