73 results about "High-speed camera" patented technology

The invention discloses a vibration displacement measurement method and system based on multi-source data fusion, and belongs to the technical field of vibration measurement. The vibration displacement measurement method based on multi-source data fusion comprises the following steps: acquiring motion sequence images of an elastic tube and a rigid tube through a high-speed camera, and acquiring a vibration acceleration signal of the elastic tube through an acceleration sensor; displacement tracks, obtained by the high-speed camera, of the elastic tube and the rigid tube are extracted, and a flow-induced vibration displacement time travel curve of the elastic tube is separated; performing frequency domain analysis on the displacement track data, and determining frequency bands of the rigid tube and the elastic tube; carrying out band-pass filtering on signals of the acceleration sensor based on a frequency band of flow-induced vibration, and compensating an error of an integral trend term of the acceleration sensor by utilizing time domain displacement data of the rigid tube; and carrying out secondary integration on the filtered acceleration sensor signal, and outputting corrected displacement information. By adopting the vibration displacement measurement method and measurement system based on multi-source data fusion, the problem that effective unification of measurement precision and engineering applicability cannot be realized by an existing vibration measurement method can be solved.

The invention discloses a method for identifying an arcing mode of a vacuum arc based on deep learning. The method comprises the following steps: S1, acquiring an arcing mode image sequence; s2, establishing a deep learning network and obtaining a network training model; s3, inputting an arc image needing to be identified into the training model for identification; the deep learning network selects an improved GoogleNet network in a convolutional neural network, and the improved Googlenet network structure comprises an input layer, an initial convolutional layer, a pooling layer, an inception module, an auxiliary classifier, a global average pooling layer, a Dropout layer, a full connection layer, a softmax layer and an output layer which are connected in sequence; the vacuum arc identification method based on deep learning mainly aims at solving a series of problems that in the prior art, arcing experiments have a large amount of data including arc dynamic images shot by a high-speed camera, and manual identification is long in time consumption, low in efficiency, high in subjectivity and the like.

The invention relates to the technical field of cleaning equipment, in particular to an underwater cavitation jet observation experiment device and method based on a triangular reflector, and the device comprises a jet control device, an impact observation device, a plurality of light source assemblies and a high-speed camera. The spraying control device comprises a nozzle, and external high-pressure water flow is sprayed out downwards from the nozzle after passing through the pump pipe; the impact observation device comprises a clamping device. The clamping device comprises a triangular prism reflector and a support used for placing the triangular prism reflector. A shot picture of the high-speed camera can simultaneously comprise a free jet flow area and a jet flow impact area reflected by the triangular prism reflector. According to the double-angle free cavitation jet flow observation device, the three-edged reflector is utilized, cavitation flow evolution of a free jet flow area of cavitation jet flow and a jet flow impact area reflected by the three-edged reflector can be observed at the same time, and double-angle free cavitation jet flow observation is achieved.

The present invention provides a high-speed image analysis method suitable for identifying the interaction structure between flames in multi-jet flames, and belongs to the technical field of flame structure analysis. The present invention processes the flame self-luminescence / induced fluorescence image taken by a high-speed camera through a digital image processing method to identify the overlapping area between multi-jet flames, and specifically includes the following steps: selecting the analysis area, dividing the analysis area, Gaussian filtering, feature corner point detection, feature corner point supplementation, optical flow field calculation, flame area discrimination, flame outer contour recognition, and adjacent flame interaction extraction. The present invention discloses a high-speed image analysis method suitable for identifying the interaction structure between flames in multi-jet flames, which can identify the interaction structure between multiple flames from the flame image, and has high recognition efficiency. It can provide a method for further analyzing the interaction between flames and is very suitable for use in the field of flame structure research in multi-nozzle combustion chambers.

The invention relates to the field of robots, and provides an end-to-end time delay testing device and method for a man-machine cooperative control system, and the device comprises the man-machine cooperative control system which comprises an operation end, an execution end, and a communication link for connecting the operation end and the execution end; the scale plate is arranged on the back surfaces of the operation end and the execution end and is used for recording displacement changes; the high-speed camera is arranged in front of the man-machine cooperative control system and is used for shooting the operation process of the operation end and the execution end and ensuring that the scale plate, the handle of the operation end and the tail end of the execution device of the execution end are observed in a shot picture at the same time; and the analysis module is used for analyzing the picture shot by the high-speed camera, and recording and calculating the frame number difference when the operation end and the execution end reach the highest point, so as to obtain the end-to-end time delay of the man-machine cooperative control system. According to the invention, the problem of inaccurate end-to-end time delay test of a man-machine cooperative control system in the prior art is solved, and the time delay is accurately measured in a visual manner.

The invention discloses a multi-angle tennis track analysis method applied to tennis training, and relates to the technical field of tennis training, a training field is divided into a plurality of sub-regions, opposite high-speed cameras are arranged in each sub-region, and image data of each sub-region are acquired through the arranged high-speed cameras; constructing a corresponding training field model, obtaining a tennis flight path and a flight attitude according to the obtained image data of each sub-region, mapping the obtained tennis flight path and flight attitude into the training field model, and obtaining a tennis flight simulation image; according to the obtained tennis ball flight simulation image, the flight path and the flight attitude of the tennis ball are evaluated, and the serving quality of a trainee is judged according to the evaluation result, so that the serving quality of an athlete is effectively evaluated, and the athlete is assisted in correspondingly adjusting the serving mode of the athlete according to the evaluation result.

1. Name of the product in this design: Camera (High-speed camera - SH3). 2. Purpose of this design: This design is used for photographing high-speed moving targets. 3. The key design features of this product are its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

This invention provides a rapid exposure adjustment system and method for high-speed space cameras, belonging to the field of deep space exploration. Combining camera image grayscale statistics and PIN tube metering technology, it integrates the advantages of two traditional exposure time adjustment methods. This system can meet the needs of rapid exposure time adjustment for high-speed cameras in transiently bright scenes, avoiding overexposure of consecutive images due to transient brightness caused by impacts. Simultaneously, it can achieve fine-tuning of exposure time in scenes with gradually changing targets, ensuring imaging effects on sputtering clouds generated by impacts. This invention implements an exposure time adjustment method that combines fast and slow adjustments, as well as coarse and fine adjustments, effectively guaranteeing imaging effects in complex scenes throughout the entire kinetic energy impact process.

The application provides a transparent soil sliding body node motion trajectory tracking method and system, which obtains a motion image sequence and node trajectory data of the transparent soil sliding body through a high-speed camera and a particle image velocimetry testing device; identifies a trajectory fracture interval based on the node trajectory data, extracts motion parameters of the sliding body from the motion image sequence as constraint conditions, and correlates and repairs the fractured trajectory by using a polynomial interpolation method; verifies the repaired trajectory, and outputs complete node motion trajectory data. The application correlates and repairs the fractured trajectory by using the polynomial interpolation method, effectively makes up for the trajectory vacancy problem caused by the transparent soil particle shielding, the testing device shielding and the data acquisition loss, and realizes the trajectory tracking of the whole process of the sliding body node.

The present invention discloses a high-speed water entry impact test system and test method. The test system includes a carbon dioxide phase change acceleration module and a test structure assembly, and the test structure assembly includes a cylinder, a piston rod assembly, an electromagnetic suction cup, and a counterweight limit plate; a pressure sensor and a high-speed camera are installed in the test structure landing area in the test water tank, and a temperature sensor is installed in the carbon dioxide phase change acceleration module; in the initial state, the electromagnetic suction cup fixes the counterweight limit plate, the piston rod assembly, and the test structure in the initial position; when the test starts and the test structure has not entered the water, the counterweight limit plate, the piston rod assembly, and the test structure accelerate downward together until the test structure is accelerated to the target speed; when the test structure enters the water, the gas in the cylinder is depressurized and the acceleration of the test structure is stopped, and the test structure falls into the water body of the test water tank at the target speed. The present invention does not require a high water entry height to achieve high-speed structural entry into the water.

The invention discloses a stick-slip vibration test system for a water-lubricated nitrile rubber tail bearing, which belongs to the field of water-lubricated tail bearings and comprises a high-speed camera, an LED white light lamp, two acceleration sensor bodies, a tail shaft body, a test block, a mounting bracket, a torque meter, an infrared velocimeter, a motor and a Bamp. And K is PULES. A machine vision technology is adopted to collect a tail bearing test block vibration displacement image, an acceleration sensor body is adopted to collect a vertical vibration time domain signal and a frequency domain signal of the vibration acceleration of the tail bearing test block, then a continuous coherence theory is applied to calculate the tail bearing test block vibration displacement image, and a barcode graph is generated. Topological characteristics are obtained, perfect combination of SVM, stick-slip vibration and continuous homology is achieved, classification and identification of stick-slip vibration of the tail bearing test block are finally achieved, the test block is installed through the fastening assembly, the two acceleration sensor bodies are installed through the buckle assembly, and position adjustment and installation are simple and efficient.

The invention is suitable for the field of hot cathode ionization vacuum gauge filament life prediction and monitoring, and provides a novel ionization vacuum gauge hot cathode filament damage state monitoring device and method, and the device comprises a damage device and a state monitoring device. The damage device comprises a hand-cranking digital display sliding table, a first flange nut, a second flange nut, a third flange nut, a fourth flange nut, a short pressing plate, a first screw rod, a second screw rod, an iridium-yttrium oxide lamp filament, a cross-shaped sliding table, a long pressing plate, a bread board, a nut and a cutter fixing clamp. The state monitoring device comprises a molecular pump set, a vacuum valve, a cold cathode ionization vacuum gauge, a vacuum chamber, a hot cathode ionization vacuum gauge, a controller, an upper computer and a high-speed camera. The operation process of the damage system provided by the invention completely meets the requirement for damage to the coating width and the depth of the lamp filament, and the precision is relatively accurate. Moreover, the change of the surface of the lamp filament in the working process of the lamp filament can be observed, and real-time damage detection can be carried out on the lamp filament on the basis of processing image information in the experiment process.

The invention provides a high-speed camera and LED light source protection device for an aero-engine test, and relates to the field of aero-engine test equipment. According to the high-speed camera and LED light source protection device for the aero-engine test, the protection device is composed of a main camera cabin and two auxiliary lighting cabins and is provided with a base and a handle; a high-speed camera is placed in the main camera shooting cabin, and an LED lighting device is installed in the auxiliary lighting cabin; the three cabin bodies circulate with compressed air provided outside the test cabin through air circulation interfaces on the rear end surfaces; the engine test and protection device is used in a vacuum test cabin, the exterior of the protection device is in a vacuum state, the interior is atmospheric environment, air is forced to circulate, and temperature control can be performed. According to the high-speed camera and LED light source protection device for the aero-engine test, the problem that the high-speed camera and the LED light source cannot be used in a vacuum environment is successfully solved, and reliable recording and lighting guarantee is provided for the aero-engine test.

The detection system of an x-ray or charged particle imaging system utilizes a high bandgap, direct conversion x-ray detection material. The signal of the x-ray / charged particle projection is recorded in a spatial light modulator, for example a liquid crystal (LC) light valve. The light valve is then read out by a polarized light optical microscope and a high speed camera. The camera is used to track the halo in the light valve to resolve its intensity and correlate it to the intensity of the incoming x-ray photons or charged particles. This allows for a spatially resolved imaging with an x-ray and / or charged particle spectrometer.

The application discloses a flexible multi-body dynamics method verification experimental device, which is used in the field of flexible multi-body dynamics experiments. The system comprises a structure system, a driving system, a measuring system and a connecting system. The structure system comprises a flexible test piece, an auxiliary beam and a counterweight piece. The driving system comprises a servo motor and a feedback control component thereof. The measuring system comprises an accelerometer, an angular displacement sensor, an eddy current sensor and a high-speed camera. The connecting system comprises equivalent torsional spring pieces and design modules for fixing two flexible beam test pieces together, and the system fundamental frequency of the flexible beam is adjusted by changing the torsional spring stiffness. The application provides a device for multi-section flexible beam dynamics experiments, which can accurately measure the displacement response and acceleration response of the test piece, is consistent with the modeling analysis results, and provides an important tool for related research and development.

The utility model discloses a motion capture photographic device which comprises a supporting plate and a multi-angle adjusting mechanism. The multi-angle adjusting mechanism comprises a threaded rod, an inner threaded cylinder, a rectangular box, a rotating shaft, a U-shaped frame and a rotating column, the lower end of the threaded rod is rotationally connected to the middle of the upper end of the supporting plate, the upper end of the threaded rod is in threaded connection with the inner threaded cylinder, the upper end of the inner threaded cylinder is fixedly connected with the rectangular box, and the bottom wall of the rectangular box is rotationally connected with the rotating shaft; a U-shaped frame is fixedly connected to the upper end of the rotating shaft, rotating columns are rotationally connected to the front inner side wall and the rear inner side wall of the U-shaped frame correspondingly, and a high-speed camera is arranged between the inner side ends of the rotating columns; according to the motion capture photographing device, when motion capture photographing is carried out and the photographing angle of the high-speed camera needs to be adjusted, a worker does not need to manually adjust the photographing angle of the high-speed camera, the photographing angle of the high-speed camera can be remotely adjusted and controlled, and the workload of the worker is reduced.

This application relates to the field of sports event tracking and filming technology, and discloses a method and system for sports event tracking and timing filming. The method includes: analyzing the real-time status of participants based on real-time data collected from at least two mobile high-speed cameras and real-time timing data of the event to obtain real-time status information; calculating the probability of participants at each position based on the real-time status information to construct a set of position distribution probability pipelines; analyzing the coverage value of cameras at different positions on each position distribution probability pipeline in the set of position distribution probability pipelines, and selecting the camera combination with the optimal coverage value; analyzing the real-time status information of participants, assigning at least one tracking role and tracking target to each camera in the camera combination to obtain a tracking and filming strategy; and controlling the corresponding camera to perform target tracking according to the tracking and filming strategy. This application can improve the success rate of capturing moments such as overtaking and sprinting of participants, and improve the quality of tracking and filming.

The invention provides a method for testing vibration characteristics of an inflatable wing. The method comprises the following steps: S1, spraying speckles on a wing surface of a to-be-tested inflatable wing; s2, fixing the inflatable wing to be tested on a vibration table, and adjusting the high-speed camera until the visual angle covers the wing surface; s3, starting the acceleration test device and the DIC test device, and configuring a first test parameter for the vibration table to perform device calibration; s4, configuring a second test parameter for the fine adjustment valve and the vibration table, and carrying out a vibration frequency sweeping test to obtain first test data; s5, closing the DIC test device, configuring third test parameters for the fine adjustment valve and the vibration table, carrying out random vibration test, and recording second test data; and S6, performing signal data analysis and atlas transformation on the first test data and the second test data to obtain inherent frequencies, vibration modes and damping ratios of the first several orders of the inflatable wing to be tested. The beneficial effects are that the method can comprehensively and accurately test the vibration characteristics of the inflatable wing, and improves the flight performance and stability of an aircraft.

The invention provides a high-speed camera trigger control device and method, and is applied to the technical field of camera control. The equipment comprises a trigger threshold adjustment unit, a signal analysis and comparison unit and a camera trigger control and time service unit. The trigger threshold adjusting unit comprises an FPGA control chip and a DAC chip. The FPGA control chip responds to the threshold setting instruction to generate a threshold digital signal and generates a time frame in an ASCII format according to the IRIG-B time signal; the DAC chip generates a trigger threshold according to the threshold digital signal; the signal analysis and comparison unit generates TTL trigger signals when the target pulse signals meet a trigger threshold value, and the TTL trigger signals are used for triggering a plurality of high-speed cameras to carry out image acquisition; and the camera trigger control and time service unit adopts a coaxial cable to send TTL trigger signals to the plurality of high-speed cameras and adopts a twisted-pair cable to send time frames to the plurality of high-speed cameras. The method is suitable for synchronous trigger control and high-precision time synchronization of a plurality of high-speed cameras.

The present invention discloses a vibration displacement measurement method and measurement system based on multi-source data fusion, which belongs to the field of vibration measurement technology. The vibration displacement measurement method based on multi-source data fusion includes the following steps: obtaining motion sequence images of an elastic tube and a rigid tube through a high-speed camera, and simultaneously obtaining the vibration acceleration signal of the elastic tube through an acceleration sensor; extracting the displacement trajectory of the elastic tube and the rigid tube obtained by the high-speed camera, and separating the flow-induced vibration displacement time-history curve of the elastic tube; performing frequency domain analysis on the displacement trajectory data to determine the frequency band of the rigid tube and the elastic tube; band-pass filtering the acceleration sensor signal based on the frequency band of the flow-induced vibration, and using the time domain displacement data of the rigid tube to compensate for the error of the acceleration sensor integral trend term; performing secondary integration on the filtered acceleration sensor signal, and outputting the corrected displacement information. The vibration displacement measurement method and measurement system based on multi-source data fusion described in the present invention can solve the problem that the existing vibration measurement method cannot achieve an effective unification of measurement accuracy and engineering applicability.

The application discloses a kind of high impact load under spring mass system dynamic response polarized optical measurement system and method, belong to optical measurement technical field, for analog launch load and service load etc. High impact load working condition of spring mass system, by constructing birefringent interference color feature unit on the surface of the base and mass block of spring mass system, using polarization dark field to filter background stray light, cooperate with high-speed camera, so that mass block presents as high-contrast color spot, through HSV color segmentation and relative displacement calculation based on motion coordinate system, the non-contact, clear and continuous measurement of millisecond transient displacement response of mass block is realized.The application effectively fills the experimental measurement blank of high overload dynamics, eliminates the interference of the increased mass caused by the introduction of sensor in contact measurement, and provides high-fidelity visual data support for the dynamic response research of spring mass system in high dynamic environment.

The utility model belongs to battery shell injection moulding technical field especially a injection moulding mechanical hand for battery shell injection moulding industry, including frame, the inside of frame is provided with rotating device, rotating device includes detection sensor, detection sensor passes through high speed camera and combines image processing algorithm and judges battery shell placement direction, through setting clamping device, the clamping of battery shell is carried out, the telescopic rod of electric push rod telescopic drive slider to lift, when slider rises, the compressed stainless steel spring makes the clamping block reset, thereby makes two clamping blocks relative motion, clamps the battery shell, and the silicon layer is fixedly bonded, and the silicon layer is contacted with the battery shell, improves the clamping force and avoids the damage to the battery shell surface, the descending of slider, drives the clamping block to move back, thereby releases the clamping fixation to the battery shell.

The application provides a fast exposure adjustment system and method for a space high-speed camera, belongs to the field of deep space exploration, combines camera image gray scale statistics and PIN tube photometry technology, collects the advantages of two traditional exposure time adjustment methods, can meet the fast exposure time adjustment of the high-speed camera in a transient light scene, avoids overexposure of continuous images of the camera due to impact of transient high light, and can also realize fine adjustment of the exposure time in a slowly changing target scene, so as to ensure the imaging effect of a sputtering cloud of sputtering objects generated by impact. The exposure time adjustment method combining fast adjustment with slow adjustment and coarse adjustment with fine adjustment is realized, so that the imaging effect of a complex scene in the whole process of kinetic energy impact can be effectively ensured.

The utility model discloses a small size high -speed camera structure of imaging board detachable belongs to high -speed camera structure technical field, the utility model discloses a baffle, front shell and rear shell, and the cooperation board connector is connected between the baffle and the front shell, sets up the mounting hole on the front shell, and the convex block is installed to the lateral wall of front shell, and the thread hole is seted up in the convex block, and the imaging board mounting surface and the board connector are seted up on the front shell, and the hole is seted up on the baffle, and the counterbore is seted up to one end of the hole, and the recess is seted up to the lateral wall of baffle, and the contact plate is seted up to the lateral wall of baffle, and the hole is cooperated with the mounting hole, and the board connector is seted up between the contact plate and the imaging board mounting surface.

A printed circuit board (PCB) includes one or more signal layers in between a first surface and a second surface, the one or more signal layers including a first signal layer. The PCB includes a connector interface disposed on the first surface and a first signal via electrically coupled to the connector interface. The PCB includes first transmission line disposed at the first signal layer electrically coupling a first location to a second location of the first signal layer and a second signal via disposed at the second location. The PCB includes a power-over-cable circuit disposed on the first surface and electrically coupled to the second signal via and a receiver circuit disposed on the first surface adjacent to the power-over-cable circuit. The PCB includes a second transmission line disposed on the first surface layer electrically coupling the power-over-cable circuit to the receiver circuit.

The present application relates to the technical field of blood vessel performance test, and particularly relates to a test method for blood vessel tensile force-strength-strain and crack generation speed. The method comprises the following steps: S1, unevenly sized speckle paint point speckle processing is performed on the blood vessel; S2, a tensile fracture test is performed, a force-displacement curve is recorded by a computer, a peak tensile force and a peak strain of the blood vessel are derived, and a high-speed camera is used for shooting at the same time; S3, the tensile fracture process of the blood vessel is analyzed in real time according to the photos shot by the high-speed camera in step S2, and a crack generation speed is inferred; S4, a cross-sectional area of a tensile fracture surface of the blood vessel is calculated by using Image J software; and S5, a peak stress of the blood vessel is calculated according to the peak tensile force obtained in step S2 and the cross-sectional area of the blood vessel obtained in step S4.

The invention relates to a smooth blasting mesoscopic process visual analysis system and method. The system comprises a borehole peeping instrument, an optical endoscopic instrument, a high-speed camera and a data processing device. The drilling peeping instrument is used for checking and recording speckle changes on the blasting hole of the smooth surface; the optical endoscopic instrument is used for recording optical data of speckle movement and crack propagation images in the blasting process; the high-speed camera is used for recording optical data of speckle movement and crack propagation images in the blasting process; and the data processing device is used for tracking each mass point frame by frame according to optical data of the borehole peeping instrument, the optical endoscopic instrument and the high-speed camera, and determining the displacement of the mass point at each moment by maximizing a cross-correlation function. According to the scheme, the optical data of the rock mass in the blasting process can be accurately collected and recorded, and then through data processing, the rock mass smooth blasting mesoscopic process can be effectively and visually analyzed.

The invention relates to a particle combustion monitoring technology, and aims to provide a system and a method for observing a single-particle metal combustion process in a limited combustion mode. According to the system, a vertical hollow alundum tube is arranged in a settling combustion furnace, and a vertical opening is formed in the side face of a furnace body and penetrates into an inner cavity of the alundum tube; the hollow quartz glass tube vertically penetrates into the alundum tube, and the two air inlet tubes are respectively connected to the hollow quartz glass tube and the alundum tube from the upper ends; a high-speed camera is arranged on the outer side of the quartz glass window at the opening of the furnace body and is focused on the center line of the quartz glass tube; an electric heating element and a thermal insulation material are arranged on the periphery of the alundum tube. According to the invention, the vertical quartz glass tube is utilized to enable the metal fuel particles to settle and fall in a limited area in the ignition combustion process, and the motion trail can be always kept at the focal length position of the high-speed camera, so that a high-definition single particle combustion whole-process image is obtained; the alundum tube is used, so that the temperature can be quickly increased, and the temperature can be stably adjusted on the premise that the temperature is kept uniform.

The invention provides a high-energy steam-water-ice three-phase jet mechanism research test device and test method, and belongs to the technical field of multiphase flow thermal hydraulic test devices. The problem that in the prior art, interference of water flowing and air convection on ice layer melting measurement is not considered, and consequently experimental data have remarkable system errors is solved. The device comprises a spray pipe assembly, a visual water tank, a water level and water temperature adjusting device, a measurement and data acquisition device and a steam supply device, the spray pipe assembly and the water level and water temperature adjusting device are both arranged in the visual water tank, and the spray pipe assembly comprises a spray pipe, a target distance adjusting structure and an ice block fixing clamp. The water level and water temperature adjusting device comprises a plurality of ice trays, the longitudinal section of each ice tray is of an inverted-L-shaped structure, and the measuring and data collecting device comprises a high-speed camera, a data collecting system, a weighing sensor, a pressure sensor and a plurality of temperature sensors. The device is mainly used for research tests of steam deicing.