267 results about "Optical observation" patented technology

The invention relates to the technical field of spacecraft orbit control and space safety, and discloses a space debris orbit prediction and avoidance method, which comprises the following steps that: a ground computing center screens candidate targets and generates enhanced data packets for uploading; the spaceborne computer combines real-time navigation data to carry out geometric feature screening, and an instant high-risk target list is generated; controlling the star sensor to execute optical observation, and resolving an optical measurement relative orbit state by utilizing displacement superposition and Kalman filtering; selecting a high confidence coefficient or a conservative probability threshold according to the optical measurement state acquisition condition, and generating an avoidance instruction when the collision probability exceeds the limit; and the propulsion system responds to the instruction to execute avoidance, verifies the effect by confirming the semi-major axis variation and executes track recovery by selecting an aircraft. According to the method, the ground-air collaborative screening and shift superposition enhancement technology is adopted, the problems that the low-precision ephemeris false alarm rate is high and the detection capability of a satellite-borne sensor on a dark and weak target is insufficient are solved, and the accuracy of evasion decision making and the execution reliability are improved.

The invention provides a radar and optical observation segmental arc correlation method and system for space debris. A joint probability density function is obtained through a kernel density estimation algorithm. A radar observation arc section and an optical observation arc section are input. And converting the observation data into a geocentric celestial coordinate system. And acquiring system parameters of the observation equipment. Radar observation data and optical observation data are unified to the same dimension, and a distance measurement value weight and an angle measurement value weight are set. And calculating an initial orbit by the radar observation arc section. And calculating a joint objective function corresponding to the current orbit position speed. And if the convergence condition is met, outputting the minimum value of the joint objective function and the orbit position speed corresponding to the minimum value. Otherwise, updating the track position speed, and repeating until the convergence condition is met. And according to the minimum value of the joint objective function and the joint probability density function, judging whether association is carried out, and outputting confidence during association. The method is easy to implement and can be effectively applied to association of the space debris radar and the optical observation arc section.

An imaging device for capturing images through an eyepiece of an optical viewing device. The imaging device includes a camera that aligns with the eyepiece for capturing the images viewed through the eyepiece, and a display for displaying the images captured by the camera. The imaging device determines a type of the optical viewing device. The imaging device presents a workflow on the display based on the type of the optical viewing device. The imaging device captures metrics related to user interactions with the workflow presented on the display and the images captured by the camera during the workflow.

The invention provides a comprehensive photoelectric platform method and system for unmanned aerial vehicle detection, electronic equipment and a storage medium, and relates to the technical field of unmanned aerial vehicle detection and localization. Synchronously triggering a photoelectric platform to capture a suspicious airspace high-definition video stream and establishing a space-time corresponding database of the two; synchronizing each radio frequency receiving node by taking a high-precision atomic clock as a time reference, and processing multiple paths of signal data to obtain a time-aligned basic signal; basic signal radio frequency features are extracted and associated with equipment identification, a mapping relation between the basic signal radio frequency features and remote controller models is established, and a hardware feature library is constructed; and finally, in combination with the library identification result, the signal time difference and the optical data, correcting a multipath error by using particle filtering, predicting and updating the position of an operator, and realizing comprehensive detection and positioning of the unmanned aerial vehicle after iterative convergence, thereby realizing comprehensive detection and positioning of the unmanned aerial vehicle in combination with radio frequency detection and optical observation.

The invention provides an objective lens system and optical observation equipment. The objective lens system comprises a fourth lens with positive focal power, a third lens with positive focal power, a second lens with negative focal power and a first lens with positive focal power which are sequentially arranged on the same optical axis from the object side; the first lens and the third lens are biconvex lenses, the second lens is a biconcave lens, the fourth lens is a balsaming lens, and the image side surface of the fourth lens is a convex surface; the focal length f of the objective lens system and the focal length f1 of the first lens satisfy the relationship. According to the invention, during assembly, the tolerance requirement is low, installation and adjustment are more facilitated, the field of view is larger, the vignetting is smaller, the number of lenses is smaller, and the cost performance is higher.

The invention provides a transparent bulletproof ceramic composite structure with an electric heating function and a preparation method of the transparent bulletproof ceramic composite structure. The composite structure comprises an anti-splashing layer (1), a first middle layer film (2), a multi-layer stacked structure (3) of glass sheets and films, a first transition layer (4), an electric heating film layer (5), a second transition layer (6), a ceramic layer (7), a first antireflection film layer (8), a second antireflection film layer (9), a third antireflection film layer (10), a second middle layer film (11), an inorganic glass layer (12), a third transition layer (13) and an anti-static layer (14) which are arranged in sequence. The composite structure provided by the invention has excellent impact resistance and bulletproof grade, can effectively resist the damage of high-speed elastic sheets or impact objects, and meets the requirements of high-safety application scenes such as weapon armors, armed airplanes and high-speed trains; and the anti-static film has clear optical observation capability, high transmissivity and anti-static property.

The invention discloses a method for carrying out correlation and orbit determination on a space target based on a double-star optical observation result, and the method comprises the steps: obtaining the observation vectors of two observation stars for a certain space target in the respective visual fields, calculating the shortest distance between the observation vectors, and if the distance is always smaller than a threshold value in a time sequence, determining that the space target does not exist. And if not, determining that the two observation stars observe the same space target, calculating a midpoint of two observation vector common vertical lines of the same space target by the two observation stars as an orbit determination point, and performing orbit determination on the space target based on an orbit determination point sequence. According to the method, a low-cost space-based optical orbit determination mode is adopted, space target association is completed through an algorithm with low calculation cost, target consistency is judged based on observation vector distance constraints, a complex model or a large amount of calculation power is not needed, efficient processing can still be performed when the number of targets is large and the data size is large, and the cost and efficiency advantages are remarkable.

The invention discloses an intelligent segmental arc correlation method based on a minimum optical admissible domain, belongs to the field of intelligent calculation optimization of space target monitoring, solves the problem of large calculation amount of segmental arc correlation, and comprises the following steps: constructing the minimum optical admissible domain by a first observation segmental arc; uniformly sampling in the minimum optical tolerance domain, performing orbit propagation on each sampling point under a J2 perturbation model to obtain theoretical optical observation data of a second observation arc section, and calculating an angle root-mean-square error of the second observation arc section to obtain an angle loss function; using a DBSCAN clustering algorithm to identify wave troughs; selecting an initial value of a simplex method in each wave trough to obtain an angle optimal solution; a probability loss function is obtained through Bayesian theorem calculation; substituting the angle optimal solution into a probability loss function, and obtaining a probability optimal solution by using an LM algorithm; a threshold value is set according to the probability loss function obeying chi-square distribution, and when the probability optimal solution is smaller than the threshold value, the two arc segments are associated successfully; according to the invention, the calculation cost is saved, and the space target observation accuracy is improved.

The invention discloses a dust explosion flame free radical testing system and a testing method, belongs to the technical field of dust explosion testing, and solves the problem that existing testing equipment cannot realize visual testing of combustion flame free radicals at the initial stage of dust explosion ignition and in the development process. According to the solution, the test system comprises an explosion generation assembly used for generating single-side open type dust cloud explosion, an optical observation assembly used for observing flame free radicals, a control system, a computer and an air compressor, and semi-open type dust cloud is formed through the explosion generation assembly and is ignited and detonated; images of different free radicals changing along with flame are collected through the optical observation assembly, and visual observation, recording and analysis are carried out through the computer. The system has the advantages of being high in functionality, integrated in system, easy to operate and safe and reliable in experiment process and is suitable for various kinds of combustible dust, collected data can promote dust explosion mechanism research, and data support is provided for development of dust explosion optical early warning protection measures.

The invention discloses a point cloud intersection-based space target optical segmental arc rapid association method. The method comprises the following steps: 1, acquiring optical segmental arc data and constructing a constraint admissible domain; 2, generating a track point cloud; 3, forecasting parallel orbit point cloud; 4, fast point cloud intersection is carried out; and 5, determining an initial orbit based on point cloud intersection. Through the above process, the space target rapid segmental arc correlation method based on point cloud intersection is provided, an admissible domain is constructed by two optical observation segmental arcs and orbit point clouds are generated, and then the point clouds of the two segmental arcs are forecasted to the same moment through a parallel orbit point cloud forecasting technology. Quickly locking an overlapping region of the two point clouds by adopting a minimum bounding box method, and judging the relevance between the point clouds through a mahalanobis distance; and finally, based on the Bayesian estimation principle, carrying out initial orbit determination on the successfully associated arc segments.

A diagnostic device with an improved optical system is disclosed. The disclosed in vitro diagnostic device has a housing with an inner bottom surface having an arc shape that rises upward from one side where the light source is arranged to the other side where the cartridge sensing surface is arranged. This device may include light sources with different wavelengths arranged on one side of the lower housing. Additionally, it may include an upper housing that is coupled to the upper surface of the lower housing and has a cartridge insertion space for a cartridge with a plurality of wells. The upper housing includes an observation window that covers at least the plurality of sensing hole areas to allow optical observation of the inside of the wells.

The invention provides an astronomical positioning navigation method based on optical observation, which comprises the following steps: screening and sorting observation targets to be observed according to initial conditions of a platform and ephemeris of the observation targets to serve as an observation task list; driving the optical telescope to steer and collect observation images according to the observation task list; matching astronomical images in the observation image with a fixed star catalogue so as to calculate observed celestial coordinates of each astronomical image; extracting a moving target as an observation target through star change of the multiple frames of observation images, and obtaining a motion track of the observation target; and carrying out platform position calculation. According to the astronomical positioning and navigation method disclosed by the invention, the attitude and position calculation of the platform is completed by integrating optical observation data of a fixed star and an observation target, and the autonomous navigation and positioning of the platform under the condition of no GNSS signal are realized.

The invention discloses a sunshading and demisting system matched with an optical observation instrument. The sunshading and demisting system comprises two supports; the first framework, the second framework and the third framework are rotationally connected between the two brackets, are in semi-arc shapes and rotate in corresponding shaft holes of the brackets; a fourth framework, a fifth framework and a sixth framework which are the same are arranged at positions symmetrical to the first framework, the second framework and the third framework and are rotationally connected between the two brackets; the innermost first framework and the innermost fourth framework serve as active frameworks, and driving shafts are additionally arranged on the innermost first framework and the innermost fourth framework close to the root of the support and used for being in shaft connection with push rods of the stepping motors respectively; the two stepping motors are connected to the corresponding supports through shafts respectively. The two pieces of foldable sunshade cloth are respectively fixed on the frameworks on the two sides; the controller is electrically connected to the stepping motor and used for controlling the first framework and the fourth framework to rotate so as to unfold or fold the sunshade cloth; the air heater is electrically connected with the controller and used for supplying hot air into the skylight of the optical observation instrument through the air pipe.

Provided in the present application is a culture apparatus. The culture apparatus comprises: a housing, inside which a closed culture space is formed, the direction from one end of the housing to the other end thereof being defined as a first direction. In the culture space, assemblies are provided in sequence in the first direction: a first assembly, which comprises a light source and a gas supply assembly, the gas supply assembly being configured to provide a gas required by the culture space; and an optical observation assembly, which comprises a shell and a functional portion, the functional portion being arranged inside the shell. A light path structure is provided by the culture apparatus, and by means of the light path structure, a light beam is emitted from the light source, penetrates cultured specimen and a light-transmitting area of the shell, and is received by the functional portion, such that an observation image of the cultured specimen is formed and the observed image is outputted.

This invention discloses a method, system, and fluorescent mixed-spray device for detecting and evaluating inclined roadways in open-pit mines. The method includes: performing fluorescent material spraying and optical observation in at least two boreholes along the target exploration line; determining the spatial connectivity of roadway cavities between boreholes based on the observation results; acquiring roadway profile area data perpendicular to the exploration line at each borehole location for roadway sections determined to be connected; calculating a quantitative index characterizing the degree of profile morphology change based on the profile area data; and adaptively selecting a corresponding volume calculation model to calculate the volume of the roadway cavity based on a comparison of the quantitative index with a preset threshold. This invention combines rapid qualitative assessment of spatial connectivity based on fluorescence with accurate adaptive volume calculation based on morphological variation coefficients, using a single integrated technical process to simultaneously solve the problems of high exploration costs and low calculation accuracy in traditional methods.

The invention discloses an optical observation correlation method based on mixed multi-hour ephemeris, and belongs to the technical field of space target monitoring. Aiming at the problem that the correlation performance is reduced when the ephemeris quality is unstable due to dependence on a single ephemeris in the prior art, the method comprises the following steps of: firstly, constructing a mixed set containing multi-source ephemeris; secondly, intelligently selecting a leading ephemeris and a lagging ephemeris which are closest in time for each observation arc section and each target; then, the two ephemeris are used for association respectively, and union sets of results are obtained, so that an initial association set is expanded; and for the generated fuzzy correlation, performing primary disambiguation based on the comprehensive confidence, and performing secondary accurate disambiguation on the residual fuzzy condition by comparing the weighted angular distance residual error root-mean-square value of the whole arc section. According to the method, the dependence on single-term and single-source ephemeris precision is effectively reduced, available information is fully utilized, and the correlation robustness and accuracy of optical observation data under the complex ephemeris condition are remarkably improved.

The present invention discloses an intelligent arc segment correlation method based on the minimum optical tolerance domain, belonging to the field of intelligent computing optimization for space target surveillance, which solves the problem of large computational volume of arc segment correlation, and includes: constructing a minimum optical tolerance domain from the first observation arc segment; uniformly sampling in the minimum optical tolerance domain, and propagating the orbit of each sampling point under the J2 perturbation model to obtain the theoretical optical observation data of the second observation arc segment and calculating the root mean square error of the angle of the second observation arc segment to obtain an angle loss function; using the DBSCAN clustering algorithm to identify the wave valleys; selecting the initial value of the simplex method in each wave valley to obtain the optimal angle solution; calculating the probability loss function by the Bayesian theorem; substituting the optimal angle solution into the probability loss function and using the LM algorithm to obtain the optimal probability solution; setting a threshold according to the chi-square distribution of the probability loss function, and when the optimal probability solution is less than the threshold, the two arc segments are successfully correlated; the present invention saves computational costs and improves the accuracy of space target observation.

The invention discloses a single-particle electrode material rate capability characterization method based on optical imaging. Comprising the following steps: constructing an electrochemical test configuration allowing optical observation, executing constant-current charging and discharging under a controlled magnification, synchronously acquiring optical data, defining characterization parameters related to the magnification based on the optical data, and evaluating the magnification performance of the single-particle electrode material. According to the method, the real-time response of the particles in the charging and discharging process is obtained through optical imaging, quantitative analysis of the magnification response under the single particle scale is achieved, the problem of particle behavior averaging in a macroscopic test is solved, and the accuracy and the resolution capacity of material performance evaluation are improved. The method is easy and convenient to operate, high in testing efficiency and suitable for high-throughput and high-spatial-resolution characterization of the rate performance of the electrode material.

The invention discloses a crystal growth synthesis furnace which comprises a composite furnace body, a heating and temperature control system, an optical observation window assembly and a growth monitoring and control system. A furnace chamber of the composite furnace body is of a multi-layer gradient composite lining structure composed of a pressure-bearing water-cooled jacket, a carbon fiber reinforced silicon carbide composite material layer, a foam silicon carbide ceramic heat insulation layer and high-purity graphite paper. The heating and temperature control system adopts a distributed design and comprises a main heater, an upper auxiliary heating ring, a lower auxiliary heating disc and a lateral compensation heater. The optical observation window assembly is fixed to the center of the upper furnace cover and matched with the high-speed imaging unit to achieve in-situ monitoring of the growth process. According to the crystal growth synthesis furnace provided by the invention, accurate regulation and control of a three-dimensional temperature field and real-time visual monitoring of a growth interface in a silicon carbide crystal growth process are realized, and the crystal quality, the growth success rate and the process repeatability are remarkably improved.

The present invention discloses a method and system for reconstructing optical images with high spatiotemporal resolution based on the fusion of multi-source remote sensing data, aiming to solve the problem of missing spatiotemporal information of optical remote sensing images due to cloud cover, sensor failure and the like in the prior art. The method is as follows: 1. Acquisition, preprocessing and data pair construction of multi-source remote sensing data. 2. Constructing and training an optical image reconstruction model, the model comprising a generator that receives multi-source data as input and a discriminator. 3. Reconstructing optical images of missing phases using the trained generator to generate a complete continuous optical image time series with high spatiotemporal resolution. The present invention can effectively fill in the gaps in optical image data, and the generated images have high spatial and spectral accuracy. It can effectively process data of different resolutions and reduce the influence of geometric registration errors through a multi-input network structure, providing reliable data guarantee for remote sensing applications that rely on continuous optical observations.

The invention discloses a foldable mobile cleaning detection device and method based on a rotational flow field. The movable folding component is installed on the top of the cleaning component, the detection component is connected to the inner top face of the cleaning component, the cleaning component is used for generating a clean water flow field, the one-way top cover is installed on the top of the water locking cover, and the water injection pump penetrates through a sealing hole in the water locking cover and then is connected with four horizontal tangential water injection openings of the four-way rotational flow generator. The four-way rotational flow generator is connected with the guide vanes through bearings and connected with the single-way top cover through the supporting columns, the underwater push rod is installed on the single-way top cover and used for pushing the hexagonal holder to move up and down, and then the unfolding and closing states of the water locking cover are changed through the framework. According to the invention, a stable clear water boundary is formed by designing a special swirling flow field, direct optical observation is carried out through the clear water flow field, rapid movement detection of the robot in a low-visibility water area is realized, and excellent detection stability and high-efficiency maneuverability are achieved.

A system (100) for treating stress urinary incontinence in a patient includes a cystoscope (102) including a probe assembly (104) with a shaft (110) having a tip, an optical element (112) for capturing images, a display (118) or optical viewer for presenting the images; a rotatable sheath (400) with a shaft and at least one lumen configured to receive the cystoscope shaft, the sheath being rotatable about the cystoscope shaft: and a treatment needle (500) insertable through the sheath, the needle configured to inject a treatment agent into tissue, wherein the treatment agent comprises a non-animal stabilized hyaluronic acid.

The present application relates to a kind of calibration device and calibration method of shock wave overpressure optical measurement system based on shock tube, it is related to the field of shock wave overpressure test, wherein the calibration device includes: standard shock tube, visible measuring unit;Visible measuring unit includes: transparent quartz tube, first piezoelectric sensor, second piezoelectric sensor, third piezoelectric sensor;Transparent quartz tube one end opening, the other end is closed and is arranged;In the direction from the opening end of transparent quartz tube to closed end, first piezoelectric sensor and second piezoelectric sensor have interval and are embedded in the side wall of transparent quartz tube;Third piezoelectric sensor is embedded in the center of the closed end of transparent quartz tube.This scheme can simply, reliably produce theoretical solvable or accurately measured impact wave overpressure of various shock waves propagation process, can accurately and reliably cross-verify and error determination to the impact wave overpressure obtained in optical measurement process, can accurately calibrate the system error of optical observation wave front propagation process.

The invention relates to an imaging device (10; 110), in particular an endoscope device, for stereoscopic image generation, wherein the imaging device (10; 110) has a shaft (12; 112) that defines a longitudinal axis (14; 114) and at least one optical viewing direction unit (58, 158) for generating a viewing angle (18) of greater than 0° with respect to the longitudinal axis (14; 114).It is proposed that the imaging device (10; 110) has a periscope unit (20; 120) for combining at least two beam paths (22, 24; 122, 124) for use in stereoscopic image generation, wherein the viewing direction unit (58, 158) is rotationally fixed with respect to the shaft (12; 112) and the periscope unit (20; 120) is arranged so as to be rotatable relative to the shaft (12; 112) about the longitudinal axis (14; 114).

The invention provides an optical aiming division precision adjusting mechanism in an optical-mechanical system, relates to the field of optical aiming, and aims to solve the technical problems that a division piece adjusting mechanism in an aiming device is complex and difficult to miniaturize. The optical aiming division precision adjusting mechanism in the optical-mechanical system comprises a barrel, a division piece, a base and at least one adjusting mechanism, the division piece is arranged in the barrel, and the barrel and the adjusting mechanism are both arranged on the base; the adjusting mechanism comprises a force applying structure, and an elastic piece and an adjusting rod which are respectively positioned on two opposite sides of the dividing piece, and the force applying structure is used for enabling the adjusting rod to move in a preset direction; wherein the preset direction refers to the axial direction of the adjusting rod; the elastic piece is arranged between the dividing piece and the inner wall of the barrel, one end of the adjusting rod abuts against the dividing piece, and the other end of the adjusting rod penetrates through the barrel and the base to be connected with the force application structure. According to the optical aiming division precise adjustment mechanism in the optical-mechanical system, the adjustment accuracy and compactness of the division piece are improved.

The invention provides a 4K3D surgical microscopic light path system. The 4K3D surgical microscopic light path system comprises a focusing module, a zoom module and a reflection module which are sequentially arranged on the same imaging light path from an object plane to an image plane, a 4K3D image processing module and a binocular eyepiece module which are coupled with the light path of the reflection module, and a self-adaptive illumination module independent of the imaging light path, the reflection module is used for transmitting the imaging light to the 4K3D image processing module and the binocular eyepiece module in a beam splitting manner, the 4K3D image processing module is used for generating the imaging light and outputting a stereoscopic video signal with 4K resolution, and the binocular eyepiece module is used for converting the imaging light into a physical natural image which can be observed in real time by binocular. According to the 4K3D operation microscopic optical path system disclosed by the invention, an operator can flexibly select electronic imaging observation or optical observation according to operation requirements.

The application discloses a long-distance rail recognition and obstacle detection method and system, a long-focus optical system is combined with a super-high-speed industrial camera on a hardware level to build a high-frame-rate and long-distance optical detection system, a region of interest for obstacle detection is demarcated by recognizing and visually segmenting left and right rail lines on a software level, and a target detection-based track obstacle intrusion detection algorithm and other advanced visual tasks are executed, and finally high-frame-rate recognition and detection of long-distance rails and track obstacles are realized. The Schmidt-Cassegrain optical system with a focal length of 2000mm is combined with a super-high-speed industrial camera with a resolution of 1920*1080 and 3000 frames per second to build a long-distance high-frame-rate optical detection platform and erect on a driving position of a train, railway conditions within a range of 6km are detected in real time, and serious accidents caused by a too long braking distance of the train due to high-speed driving can be prevented. Compared with traditional train driver eye observation and laser radar scanning imaging modes, a long-distance optical observation platform and a rear-end real-time detection system can realize a longer detection distance, better detection and recognition robustness and a higher frame rate.

The invention discloses a free forging online size detection and feedback method and system based on visual perception, and relates to the technical field of free forging machining detection, and the method comprises the steps: obtaining first image data, thermal field data and optical observation data corresponding to a target forging; generating offset data representing an expected displacement vector of each pixel point in the first image data according to a mapping relation between the thermal field data and a preset refractive index; calculating optical observation residual data according to the optical observation data and the offset data; whether the mean square value of the optical observation residual data exceeds a preset mean square threshold value or not is judged, and if yes, the refractive index mapping relation is corrected, and offset data are regenerated; performing reverse correction on the first image data according to the offset data to obtain second image data; extracting forge piece size data of the target forge piece according to the second image data and judging whether a feedback instruction is generated or not; the method has the beneficial effect that the optical measurement precision in a high-temperature free forging machining environment can be improved.

The invention provides a space debris three-dimensional reconstruction method based on grazing observation imaging, belongs to the field of three-dimensional reconstruction, solves the problem of how to accurately predict the future activity trend of space debris, and comprises the following steps: obtaining an optical observation image after meeting a grazing observation constraint; sFM preprocessing, multi-view internal feature point extraction, multi-view feature point matching and bundle adjustment are carried out on the optical observation image to obtain sparse point cloud and pose information; dividing the preprocessed image into a training set, a test set and a verification set; and inputting the sparse point cloud and the pose information as initial conditions and the training set into an implicit neural expression function of NeRF at the same time, mapping the input into a feature vector after position coding correlation positioning, training the MLP, and outputting and rendering an optimal fitting result to obtain a three-dimensional reconstruction optical observation image. The working state of the space debris is evaluated by analyzing the three-dimensional reconstruction optical observation image, and the future activity trend of the space debris is predicted.