46 results about "Oil immersion" patented technology

The invention relates to the technical field of power equipment state monitoring, in particular to an oil-immersed transformer distributed temperature measurement method based on a fluorescent optical fiber sensor, and the method comprises the steps: arranging the fluorescent optical fiber sensor in a key temperature rise region in a transformer in a partitioned and layered three-dimensional topological structure, and forming a distributed temperature measurement network; exciting light is injected through a pulse laser to excite a fluorescence signal; a dual-channel phase-locked amplification technology is used to collect signals, and a dual-weight adaptive attenuation model and an oil flow coupling compensation function are combined to demodulate the temperature; reconstructing a dynamic temperature field based on a three-dimensional thermodynamic inversion algorithm, and marking high-gradient hot spots; and temperature, load current and oil flow velocity data are fused to realize graded alarm. According to the invention, the limitation of traditional single-point monitoring is broken through, the strong electromagnetic interference resistance is excellent, a global temperature field can be accurately reconstructed, dynamic early warning is realized, and the operation safety and the operation and maintenance efficiency of the transformer are remarkably improved.

The invention discloses an oil leakage detection and traceability method and system for an oil-immersed power transformer, and belongs to the technical field of transformer detection. Irradiating the surface of the transformer by adopting an ultraviolet light source with controllable power to obtain an oil leakage characteristic image of the surface of the transformer; carrying out oil leakage feature image preprocessing through graying, 3 * 3 convolution kernel Gaussian filtering, 3 * 3 weighted median filtering and a contrast-limited adaptive histogram equalization algorithm in sequence; an improved double-threshold maximum between-class variance algorithm is adopted to determine a background and a fluorescence region, and oil stains are accurately extracted through connected region analysis and texture feature screening; a diffusion main direction is determined through a gradient vector weighted voting algorithm, candidate sources are screened from an easy leakage part database in combination with a K nearest neighbor algorithm, and a final leakage source is determined through gray profile analysis and verification. Through multi-algorithm cooperation, the oil leakage detection precision and traceability accuracy are effectively improved, the method is suitable for daily operation and maintenance of the transformer, and the equipment fault risk is reduced.

A multifunctional pathological section scanning and arranging machine disclosed by the present invention comprises a rack, the rack is provided with a light path assembly, a scanning assembly, an XY platform, an objective table and a slide automatic loading assembly, the slide automatic loading assembly comprises a base, the base is rotatably connected with a rotating disc, the rotating disc is driven by a rotating disc motor fixedly installed on the base to rotate, and the rotating disc is driven by a motor to rotate. A plurality of partition columns are uniformly arranged on the turntable along the circumference at intervals, slide box placing positions are respectively arranged between every two adjacent partition columns and are used for placing slide boxes, a lifting station is arranged on one side, corresponding to the base, of the turntable, a lifting assembly and a guide assembly are respectively arranged on the base and correspond to the lifting station, and a slide pushing assembly is arranged at the upper part of the lifting assembly. The equipment disclosed by the invention integrates four basic functions of bright field, fluorescence, high flux and oil immersion lens, and has multiple purposes; and the automatic slide loading assembly can be used for sorting the scanned slides, so that an operator is helped to sort and sort the slides.

The present invention discloses a system and method for fabricating a double-ring structure in one step based on laser direct writing. The system includes a continuous laser, a beam expansion system, an attenuation plate, a half-wave plate, an optical shutter, a spectrometer, an oil-immersion objective lens, and a positive-negative adjustable photoresist sample arranged along an optical path; further includes a three-dimensional high-precision nanopositioning translation stage, a lens, a CCD camera, and a computer; the spectrometer focuses an incident continuous-wave laser beam onto the surface of the positive-negative adjustable photoresist sample via the oil-immersion objective lens, and a portion of the laser beam incident on the sample surface is reflected back onto the spectrometer and then irradiated onto a third lens; the oil-immersion objective lens focuses the laser beam onto the sample, thereby fabricating the double-ring structure in one step. The present invention can obtain the double-ring structure in one step through a single process at a lower cost, rather than through two or more cumbersome steps; and the inner and outer diameters of the desired double-ring structure can be flexibly changed by changing the power density and the direct writing time.

The invention relates to a device for monitoring acetylene dissolved in oil of an oil-immersed current transformer. A detection optical fiber is fixed in an oil path pipeline through an optical fiber mounting assembly; the sampling end of the oil sampling tool is connected to the oil outlet of the oil-immersed current transformer; the oil way pipeline is connected to the oil outlet end of the oil taking tool. The optical fiber installation assembly comprises a threaded connection main body provided with external threads, the tail end of the threaded connection main body is connected with the tail end of the oil way pipeline, the tail end of the threaded connection main body is provided with an installation groove used for installing a detection optical fiber, and a threaded structure is arranged in the installation groove; the detection optical fiber is fixedly arranged in the mounting groove; the threaded connection main body is also provided with at least two axial first through holes penetrating through the threaded connection main body, and an external optical fiber penetrates through the first through holes to be connected with the detection optical fiber; a plurality of second through holes are formed in the surface of the circular pore plate, and external threads matched with the thread structures are arranged on the outer circumferential surface of the circular pore plate. According to the invention, in-situ measurement of acetylene in insulating oil is realized.

The utility model discloses an optical cable butt joint structure used in a vacuum cavity or oil, which comprises a butt joint cylinder and optical fiber butt joints respectively arranged at two ends of the butt joint cylinder, each optical fiber butt joint comprises a connecting piece, a locking bolt, a limiting piece and an optical joint, the center of the connecting piece is provided with a via hole along the axial direction, and the locking bolt is arranged in the via hole. A through hole of the connecting piece is used for accommodating and fixing an optical cable, the locking bolt sleeves the outer side of the connecting piece, the limiting piece is connected to one end, close to the butt joint cylinder, of the connecting piece, a mounting hole is formed in the limiting piece, one end of the optical connector is fixedly connected into the mounting hole of the limiting piece, and the other end of the optical connector is fixedly connected with the butt joint cylinder. According to the utility model, vacuum or oil filling inside the optical fiber butt joint structure is ensured through the through holes arranged on the butt joint cylinder, the problem of partial discharge or uneven electric field caused by insufficient vacuum or oil immersion is avoided, and the optical fiber butt joint is in threaded connection with the butt joint cylinder, thereby facilitating the disassembly and assembly of the optical fiber butt joint, facilitating the maintenance in case of abnormity, and improving the reliability of the optical fiber butt joint. The practicability is high.

This invention belongs to the field of medical image processing technology, specifically relating to a method for identifying, counting, and determining the proportion of target-shaped red blood cells. The method involves acquiring high-resolution digital images of bone marrow or peripheral blood smears under an oil immersion lens; inputting these high-resolution digital images into a dual-task deep learning detection model, which simultaneously performs pixel-level semantic segmentation of individual red blood cells and their intracytoplasmic target structures; based on the localization and pixel-level semantic segmentation, determining the presence and classification of each red blood cell, counting the number of target-shaped red blood cells and the total number of red blood cells, and determining the proportion of target-shaped red blood cells using a proportioning algorithm; based on the proportion of target-shaped red blood cells, fusing red blood cell parameters to generate morphological integrated indicators, and outputting a diagnostic report. This solves the problems of lacking standardized image acquisition procedures and difficulty in accurately distinguishing between target and non-target-shaped red blood cells in existing technologies.

The invention discloses an explicit solution method of ball disc oil film resistance, which comprises the following steps: enabling a single roller and a bearing ring of a bearing to be equivalent to a ball-disc contact model, establishing a resistance solution formula based on the ball-disc contact model, and dividing a contact area into a lubrication area, a deformation area and a breakdown area; the explicit solution method comprises the following steps of ball-disk potential solution, lubrication area resistance solution, lubrication area resistance correction, deformation area resistance solution, breakdown area resistance solution and total resistance solution. According to the explicit solution, the mode of calculating the capacitance by calculating the potential and the charges is applied to resistance calculation in an analogy mode, the influence of the oil immersion angle is considered by changing the integral limit, the influence of the contact angle on the oil film resistance is corrected through the weighted average calculation mode, the calculation error can be reduced, and the method is suitable for more working conditions.

The invention relates to a reliability device for testing an optical microphone by simulating oil pressure and a testing method, and belongs to the technical field of optical sensor testing. The device mainly comprises a test box, an oil conservator, an air pressure system, a pressure control system and an ultrasonic signal generation system. The test box is pressurized through the blast pump and the oil conservator, and oil pressure environments at different depths in the transformer are accurately simulated by using a plurality of pressure release valves with different pressure thresholds. According to the invention, not only can the sensitivity and the minimum sensing amount of the optical microphone under different static oil pressures be tested, but also fatigue life evaluation can be carried out through controllable pressure circulation. The device has the advantages that the oil pressure control is accurate, the range is wide, the safety is high, the functions of vacuum simulation, ultrasonic excitation and the like are integrated, and a key test means is provided for model selection, point distribution and reliability evaluation of the optical microphone in the oil-immersed transformer.

The invention relates to the technical field of electrical equipment defect detection, and particularly discloses an oil-immersed transformer detection device based on fluorescence reflection. The device integrates excitation, filtering, imaging, data processing and supporting modules, realizes oil film thickness quantification through a corrected Beer-Lambert law, analyzes oil film edge continuity based on a fluid mechanics equation so as to discriminate the oil stain type, and solves the problems of fuzzy nature determination, incapability of quantification and low discrimination precision in the prior art.

This invention discloses a non-oil immersion large numerical aperture microscope objective, composed of a first lens group S1, a second lens group S2, a third lens group S3, and a fourth lens group S4. The total length (Lob) of the four lens groups is ≤50mm, and the focal length (EFL) of the microscope objective is... ob The focal length EFL of the first lens group S1 S1 The focal length EFL of the second lens group S2 S2 The focal length EFL of the third lens group S3 S3 The focal length EFL of the fourth lens group S4 S4 Satisfying: -3.40 ≤ EFL S1 / EFL ob ≤-3.90, 5.0≤EFL S2 / EFL ob ≤9.0, 8.0≤EFL S3 / EFL ob ≤21.0, 1.30≤EFL S4 / EFLob≤1.75, HI / EFLob≤0.139, where HI is the height of the observed object. The second lens group S2 can move along the optical axis. Its advantage is that the numerical aperture of the objective lens can be ≥0.95 without oil immersion. By adjusting the distance between the objective lens elements, the imaging blur caused by the processing error of the coverslip can be corrected, and the difference caused by the thickness of the coverslip can be compensated. It has a good effect on correcting chromatic aberration without using special optical materials such as DOE.

1. The name of this design product: internal oil storage cabinet. 2. Purpose of this design product: to compensate for the change in internal transformer oil volume caused by the temperature change of the oil-immersed transformer during operation. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

The invention discloses a coal rock maceral identification method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring a coal rock microscopic image, wherein the coal rock microscopic image comprises a microscopic image under oil immersion reflected light and a microscopic image under fluorescence; the coal rock microscopic image is recognized based on a coal rock maceral recognition model, the coal rock maceral category is determined, and the coal rock maceral recognition model is composed of a multi-scale bimodal convolutional neural network structure. According to the technical scheme of the invention, the coal rock maceral is automatically identified through the idea of multi-scale bimodal fusion, and the method has the advantages of high accuracy, rapidness, simplicity, convenience and high repeatability.

An oil level detection device and an oil-immersed transformer. The oil level detection device that includes a detachable oil tank and an optical oil level gauge is applicable to the oil-immersed transformer. The oil-immersed transformer includes an oil storage device for storage of an insulating oil. The detachable oil tank includes a lower tank body disposed on the oil storage device, and an upper tank body disposed above and in spatial communication with the lower tank body. The lower tank body has a second oil chamber that is in spatial communication with a first oil chamber of the oil storage device for circulation of the insulating oil. The optical oil level gauge is disposed on the upper tank body for projecting a sensing beam onto the insulating oil within the second oil chamber and detecting a height change of an oil surface.

This utility model relates to an oil-immersed transformer pressure-holding and sealing testing device, belonging to the field of transformer manufacturing technology. It includes a testing pool and testing equipment mounted on the upper surface of a base. The testing equipment consists of a first electric slide rail, a gantry frame, a hydraulic telescopic rod, and a load-bearing structure. An observation mechanism is provided outside the testing pool. The observation mechanism includes a moving component, a piston assembly, and a camera. The moving component includes a second electric slide rail fixed to the upper surface of the base and surrounding the testing pool, with a mounting bracket connected to the second electric slide rail. The observation mechanism also includes a wave seat fixed outside the testing pool and used in conjunction with the piston assembly. This oil-immersed transformer pressure-holding and sealing testing device uses a camera to capture real-time images of air bubbles on the transformer surface. Combined with the airflow cleaning function of the piston assembly, it ensures clear images, improves testing accuracy, and automates the entire testing process, reducing manual intervention.

The invention discloses an astigmatic displacement microscopic imaging method and an astigmatic displacement microscopic imaging device for axial sub-nanometer resolution, namely an astigmatic displacement microscope (ADM). The astigmatic displacement microscopic imaging method and the astigmatic displacement microscopic imaging device for axial sub-nanometer resolution are applied to an astigmatic displacement microscope (ADM). The ADM technology is based on the astigmatism measurement principle, has the advantage of optical non-contact, and can simultaneously realize four measurement functions: microscopic three-dimensional shape scanning imaging, displacement measurement, vibration analysis and film thickness measurement. The Z-axis resolution of three-dimensional morphology imaging is about 0.1 nm, and the thickness detection of a monatomic layer of a two-dimensional material and the like can be met; the device can be matched with any objective lens, such as working media of air, water immersion and oil immersion; a fast scanner is adopted to replace a traditional sample displacement table for scanning, and the imaging time of a single image is fast to a second level; and in combination with a normalization circuit, the influence of different sample reflectivity on a measurement signal can be eliminated. The astigmatic displacement microscope can meet the test requirements of application scenes such as micro-nano devices, semiconductors, piezoelectric sensing, material morphology measurement, in-situ surface and interface research, precise displacement measurement, microscopic vibration analysis and the like.

The invention discloses a capacitor film breakdown characteristic comprehensive test method and device, and relates to the technical field of power test. The device comprises a control device, and an oil immersion device, a film device, a grounding electrode device, a first power connection electrode device, a second power connection electrode device, a test power supply device and a test recording device which are electrically connected with the control device. Through cooperation of all the devices, the requirement for rapid and efficient testing of a large number of to-be-tested films can be met. Point testing and surface testing functions are achieved, and testing diversity is improved; in addition, the oil immersion device can be selected to enable the to-be-tested film to be in an oil immersion state, so that the test condition is closer to the actual operation condition, and the test accuracy is improved. And the test power supply device has a function of switching power supply output modes, so that a breakdown test under direct current can be carried out, and various voltages of other types can be applied to carry out tests in consideration of actual working conditions.

The utility model relates to the technical field of micro-nano optics, in particular to a light field switching device and a light field switching and characterization system. The light field switching device comprises a laser, an optical parametric oscillator, a three-dimensional moving table, a substrate and an oil-immersed objective lens fixed on the three-dimensional moving table, the laser, the optical parametric oscillator, the three-dimensional moving table and the substrate are sequentially arranged, a metal film layer is plated on one side of the substrate, and the three-dimensional moving table is configured to bear the oil-immersed objective lens to move relative to the substrate. The three-dimensional moving table is moved to drive the oil-immersed objective lens to move, so that the relative distance between the focus of the oil-immersed objective lens and the metal film layer on the substrate is changed, the focusing degree of the exciting light is controlled, the exciting light focused by the oil-immersed objective lens and the metal film layer are subjected to different reactions, and different fields to be measured are generated. A user can quickly switch different tight focusing light fields and surface plasmon polariton fields only by adjusting the three-dimensional mobile station, and when parameters of incident light are changed, the switching device is still applicable and has high reusability.

The application discloses a super-long focal depth vector polarized light imaging system and method for minimum light flux depth imaging, and relates to the field of optical imaging. The system comprises a laser for emitting excitation light; a vector polarized light generator for converting the excitation light into vector polarized light; a phase modulation element for phase modulating the vector polarized light; an imaging module comprising a high numerical aperture objective lens and a silicon oil immersion objective lens for high-precision positioning of fluorescent molecules in biological tissues; and a detection module for receiving and detecting fluorescent signals emitted by the fluorescent molecules to realize positioning and imaging analysis of the fluorescent molecules. The application significantly expands the imaging focal depth through vector polarized light and phase modulation, and can realize high-resolution imaging in tissues with a depth of more than 1 micrometer.

The utility model provides a kind of oil dropping device for high-power oil lens microscopic imaging, including support adjustment module, oil storage module and oil inlet module, and oil inlet module and oil storage module are fixedly installed on support adjustment module;Oil inlet module includes quantitative pump, oil pipe, oil dropping needle and oil dropping needle fixer, and quantitative pump is fixedly installed on the fixed plate that support adjustment module has;Oil dropping needle is fixedly installed on the adjusting support that support adjustment module has by oil dropping needle fixer, and adjusting support is used to adjust the position of oil dropping needle, and oil dropping needle, quantitative pump and oil storage module are sequentially connected by oil pipe.This utility model ensures the quantity of each oil drop consistent by quantitative pump assembly, can realize accurate quantitative oil drop, avoids the problem that manual operation oil drop quantity is not accurate, and through support adjustment module, the position of oil dropping needle can be flexibly adjusted, and the position of oil dropping needle can be adjusted according to actual needs, to adapt to the observation needs of different samples.

The utility model relates to the technical field of microscope auxiliary equipment, in particular to a device for automatically oiling a slide, detecting oil and recovering oil in a slide box. Comprising a microscope, an objective lens of which is provided with an oil immersion lens; the object carrying workbench is located below the objective lens and comprises an object carrying plate, a material taking assembly arranged on the object carrying plate, a first X-axis driving assembly driving the object carrying plate to move along the X axis and a Y-axis driving assembly driving the object carrying plate to move along the Y axis. The oil supply mechanism is used for supplying oil to the slide on the observation position of the microscope as required and comprises an oil nozzle and an oil supply assembly which are connected through an oil supply pipeline; the detection mechanism comprises a sensing device, and the sensing device faces an oil dripping position on a slide on the observation position of the microscope; the slide box feeding and discharging mechanism is located on the side edge of the carrying workbench. The device for automatically oiling the slide, detecting the oil and recovering the oil in the slide box can automatically oil, detect the oil and recover the oil in the slide box, and is high in practicability.

The utility model discloses an oil-immersed light high-voltage test transformer which comprises a transformer body, a plurality of binding posts are installed at the top end of the transformer body, fixing plugs are inserted into the tops of the binding posts, electric connection rods are installed in the binding posts, electric connection sleeves are connected to the outer sides of the electric connection rods in a sliding mode, and the fixing plugs are inserted into the fixing plugs. A supporting ring is installed on the side wall of the power connection sleeve, a groove corresponding to the power connection sleeve is formed in the bottom of each fixing plug, and one side of each fixing plug is fixedly connected with an L-shaped linkage rod. The limiting block, the L-shaped linkage rod and the fixing plug are limited through rapid limiting and locking of the limiting wedge block on the limiting block, the stability of extrusion of the fixing plug and the supporting ring on the end of the connecting line is guaranteed, the improved connecting operation is simpler, more convenient and faster, compared with a traditional screwing mode, the time for connecting multiple lines is shortened, and the connecting efficiency is improved. The connection efficiency is improved, and the labor intensity of operators is reduced.

An oil removal method is disclosed that removes an oil for an oil immersion object lens adhering to a smear surface of a smear of a sample. The method may include removing the oil by moving at least one of a first holder holding the smear to be subjected to oil removal or a second holder holding an oil absorption member that absorbs the oil from a separated state where a contact surface of the oil absorption member and the smear surface are positioned away from each other to a contacting state where the smear surface and the contact surface are in contact with each other, and moving at least one of the first holder or the second holder from the contacting state to the separated state after removing the oil.

The invention relates to an optical microphone vibration environment reliability test device and test method, and belongs to the technical field of power equipment detection. The device comprises a test box body, a vibration simulation system, an oil-immersed environment simulation system, an ultrasonic signal generation system and an optical microphone fixing part, and can simulate the multi-axial vibration working condition of the oil-immersed transformer in a range of 1-600Hz at high precision. The testing method of the scheme comprises the following steps: testing the change rule of the sensitivity and the signal-to-noise ratio of the optical microphone along with vibration parameters in a simulated oil immersion vibration environment; the method comprises the following steps: quantitatively measuring cavity length drift of a Fabry-Perot interference cavity caused by vibration by using a laser interferometer, and establishing a cavity length-frequency mapping model; and carrying out a reflecting diaphragm durability test and an optical fiber bending loss test, and evaluating the performance attenuation and the service life under long-term vibration. According to the invention, the blank in the prior art is filled, and a systematic evaluation basis is provided for reliable application of the optical microphone in the transformer.

This invention discloses a method for detecting fires in outdoor oil-immersed transformers based on binocular 3D vision. Based on the imaging effect of an infrared thermal imager, the geometric imaging model of the infrared thermal imager is treated as a pinhole camera model, and a pinhole camera model is established. A checkerboard calibration plate is fabricated. Using external transmission infrared radiation, the specially made checkerboard calibration plate is attached to the surface of the heat source. Multiple infrared images of the calibration plate from different angles are acquired, and then calibration is performed using a camera calibration tool provided by OpenCV. The intersection center of the horizontal and vertical bars of a ladder is used as a feature reference point for calibrating the extrinsic parameters of the infrared thermal imager. The EPnP algorithm and ICP-based 3D-3D pose estimation are used to calculate the camera pose. After registration of the infrared and visible light images, abnormal high-temperature areas and target points are extracted. This invention solves the problem of large errors in single-band infrared fire detection methods due to interference from outdoor sunlight, humidity, and wind speed, and improves the accuracy of calibration.

This invention provides a rotating interferometric imaging spectroscopic microscopy system and apparatus. Light emitted from a multi-band LED light source passes through a multi-band fluorescence filter to obtain narrowband light, which then enters an oil immersion lens to illuminate a fluorescently labeled sample. The excitation light from the fluorescently labeled sample passes through the multi-band fluorescence filter into a rotating Sagnac interferometer, forming two transversely sheared interference beams. These beams are then converged through a Fourier lens onto the image plane of a high-sensitivity camera, generating an interference image. The high-sensitivity camera continuously acquires multiple frames of interference images. A computer processing module performs multi-frame interference image registration and Fourier transform to achieve spectral reconstruction, obtaining a unified spectral data cube that includes both two-dimensional image information and one-dimensional spectral information of the fluorescently labeled sample. This invention utilizes interferometry to obtain the spectral information of all pixels in the sample, offering high light throughput and high reliability, thus improving the imaging system's resolution of fluorescently labeled samples.

The present invention discloses a system and method for fabricating micro-nanostructures in one step using the properties of positively and negatively tunable photoresist. The system includes a continuous laser, a beam expansion system, an attenuation plate, a half-wave plate, an optical shutter, a spectrometer, an oil-immersion objective lens, and a positively and negatively tunable photoresist sample arranged along an optical path. The system also includes a three-dimensional, high-precision nanopositioning translation stage, a lens, a CCD camera, and a computer. The spectrometer reflects a portion of the laser light incident on the surface of the positively and negatively tunable photoresist sample back to the spectrometer, where it is then irradiated onto a third lens. The oil-immersion objective lens focuses the laser beam onto the sample, fabricating micro-nanostructures of various shapes in one step. The system is then developed using a developer or debonded using a debonding solution. The present invention utilizes a simple continuous laser direct writing method to create a novel polymer structure with both positive and negative properties. This system can fabricate a variety of polymer micro-nanostructures in one step, facilitating the low-cost design of complex submicron patterns and exhibiting promising development prospects.

The utility model relates to the technical field of electric power engineering equipment, in particular to an oil-immersed power transformer which comprises a transformer body, an oil tank support is fixedly installed on one side of the transformer body, and an oil level gauge assembly is arranged on the top of the oil tank support; by arranging the oil tank body, the oil conveying pipe, the light disc, the stroboscope lamp body and other components, the transformer body communicates with the oil tank body through the oil conveying pipe, so that liquid oil in the transformer can flow into the oil tank body. When the oil level changes, the floating disc drives the connecting rod and the light disc to move up and down, and the pressure-sensitive trigger element at the bottom of the light disc controls the light emitting color of the stroboscope lamp body. Therefore, the device can monitor the change of the oil level to visually warn the screened abnormal condition of the oil level through the light beams with different colors of the stroboscope lamp. By arranging the light-transmitting holes, the polyhedral crystal, the light-transmitting grating, the limiting columns and other parts, the movement range of the floating disc is limited through the limiting columns, and the oil level monitoring accuracy is guaranteed.