1968 results about "Ccd camera" patented technology

The invention relates to the technical field of additive manufacturing, and particularly discloses a real-time defect detection and in-situ repair method and device in the additive manufacturing process, and the method comprises the steps that a multi-mode sensing system is integrated on additive manufacturing equipment, the multi-mode sensing system comprises a high-resolution CCD camera, a laser scanner and a thermal infrared imager, and data acquisition is synchronized; a hierarchical scanning strategy is adopted, two-dimensional surface images, three-dimensional point cloud data and thermal field distribution information are collected before and after each layer is machined, and the data synchronization precision is smaller than 0.1 ms; according to the invention, a multi-modal sensing system and an advanced algorithm are integrated, so that real-time detection and accurate repair of defects are successfully realized; a high-resolution CCD camera, a laser scanner, a thermal infrared imager and other sensors are adopted, a cross-scale RANSAC algorithm and a depth feature fusion network are combined, surface and internal defects are accurately detected, and laser remelting parameters are adjusted in real time for in-situ repair.

The invention relates to the technical field of chip processing, in particular to electronic chip visual detection equipment and a detection method.The electronic chip visual detection equipment comprises a workbench and further comprises a distance adjusting mechanism, a supporting plate, a conveyor, a first support, an image collecting mechanism, a cleaning mechanism, a misjudgment preventing mechanism, a displayer and a computer, and the distance adjusting mechanism is fixedly connected to the upper surface of the workbench; the two supporting plates are transversely installed at the front end and the rear end of the top of the distance adjusting mechanism correspondingly. The conveyor is transversely installed on the upper surface of the supporting plate, and the electronic chips are conveyed from left to right through the conveyor. The first support is fixedly connected to the middle of the rear side of the upper surface of the workbench. The image acquisition mechanism is installed at the front end of the lower surface of the first support. The automatic feeding device is suitable for feeding electronic chips of various specifications, improves the visual detection efficiency, has an electronic chip cleaning effect, prevents detection misjudgment, regularly removes dust and maintains the CCD camera and the visual light source, improves the image definition, and further improves the detection accuracy.

The present invention belongs to the field of water-jet guided laser micro-hole machining. Specifically, provided is a machining apparatus for a water-jet guided laser micro-hole with a high surface quality, the apparatus comprising: a nanosecond laser device, which is turned on on the basis of a control instruction of a machining control system and refracts an incident laser into a laser water-jet coupling head by means of an optical path transmission unit; a CCD camera, which is arranged above the optical path transmission unit, wherein the laser enters a detection optical path by means of the optical path transmission unit and images on the CCD camera, so as to detect the position of a laser spot diameter at a nozzle of the laser water-jet coupling head in real time, and to complete the coupling of the laser and a water jet; and the laser water-jet coupling head, which is used for coupling the laser, which is focused in the coupling head, and a high-pressure water flow, which enters a coupling cavity through a pipe of a water cavity sidewall, at small holes of the nozzle, so as to perform micro-hole machining on a workpiece. By means of the present invention, interference with a stable jet is reduced, and a micro-hole with a high roundness, a low taper and a good outlet / inlet morphology can be machined, thereby improving the machining efficiency, while also ensuring the precision and quality of micro-hole machining.

The invention discloses an on-line detection method and system for etching quality of a laser perovskite cell, and the method comprises the steps: employing a double-camera alternate working mode, installing high-resolution CCD camera assemblies at two sides of a laser processing head in an X direction, eliminating the shielding of a motion direction, carrying out the scribing quality analysis through combining the submicron optical imaging of the CCD camera assemblies with an image processing algorithm, and carrying out the detection of the etching quality of the laser perovskite cell. According to the method, local adaptive threshold segmentation is put forward, an Otsu method is used for adaptively calculating a binarization threshold, a morphological opening operation is used for removing irrelevant information, an edge searching logic algorithm is used for searching two edges of a scribed line, finally, the two edges and a center line are fitted, and scribed line quality analysis is carried out through the three lines. And real-time power adjustment, position calibration and defect position marking are carried out by detecting the scribing quality, the calculation speed of the high-resolution optical detection system is high, detection can be carried out while machining is carried out, and machining-detection-correction closed-loop control is achieved.

The invention belongs to the technical field of cookware visual inspection machines, and particularly relates to a cookware surface flaw detection device and method.The cookware surface flaw detection device comprises at least two CCD cameras which are arranged above and below a cookware to detect the upper surface and the lower surface of the cookware; the roller type clamps are symmetrically arranged; a conveyor belt; one group of laser ranging positioners are mounted in the middle gap of the conveying belt, and the other group of laser ranging positioners are arranged between the roller-shaped clamps and used for positioning detected cookware; the detection method comprises the following steps: step 1, placing the cookware; step 2, conveying the cookware; step 3, clamping the cookware; step 4, cookware detection; and step 5, comprehensive detection. Compared with the prior art, the cookware can be clamped through the opposite clamping rollers, the clamping position and angle can be changed during detection, meanwhile, the position and angle of the cookware relative to a CCD camera are changed, the influence of light reflection and shielding on shooting is reduced, and the cookware can be comprehensively and accurately detected.

The invention discloses a large-size grinding wheel concentricity error measurement method and system based on machine vision, and relates to the technical field of grinding wheel concentricity error measurement, and the method comprises the steps: calibrating an industrial CCD camera through PyCharm software, collecting a part of images of a grinding wheel, and carrying out the RGB three-channel extraction, gray conversion, filtering and binary segmentation processing of the collected images; secondly, a Canny edge operator is adopted to carry out coarse positioning on the edge of the image, and then a novel edge judgment criterion is established to construct an edge detection model with sub-pixel-level precision; and finally, carrying out feature fusion on sub-pixel contours of RGB channels, clustering extracted discrete point sets by using an improved DBSCAN algorithm, and then carrying out ring fitting by using improved RANSAC to realize accurate measurement of the inner and outer diameters and concentricity of the grinding wheel.

The invention relates to a continuous casting billet surface defect CCD scanning imaging detection method and system, and relates to the technical field of casting billet detection.The method comprises the steps that multiple light sources are used for illuminating the surface of a casting billet, and a high-resolution CCD camera is used for collecting images of the surface of the casting billet; carrying out denoising processing on the acquired image, and improving the signal-to-noise ratio of the image by adopting adaptive Gaussian filtering and an image enhancement algorithm to obtain a first enhanced image; correcting image blurring caused by high temperature and dynamic change of the surface of the casting blank in the first enhanced image by adopting an optical flow method, and calculating a motion vector of each pixel point in the first enhanced image to obtain a second enhanced image; performing surface defect identification on the enhanced second enhanced image through a convolutional neural network, and determining surface defects on the surface of the casting blank; and determining the size and position of each surface defect based on sub-pixel precision calculation. According to the invention, the detection precision and robustness of the surface defects of the casting blank can be improved.

According to the switchable double-laser-head machining light path system and device, a three-dimensional galvanometer and a cutting head assembly are integrated into a machining head assembly, a light path switching mechanism is adopted, two dichroscopes are horizontally moved through a sliding table, selective light splitting is conducted on wavelength setting of the two dichroscopes, and therefore the machining precision of the two dichroscopes is improved. Rapid seamless switching and light path multiplexing between a three-dimensional galvanometer machining mode and a cutting head machining mode are achieved, it is ensured that the lens angle does not need to be adjusted again or light path alignment does not need to be conducted after light path switching, coaxial CCD monitoring is adopted, according to the wavelength setting characteristics of the two dichroscopes, the wavelength differentiation design is conducted on the first illumination light source and the second illumination light source, and therefore the machining efficiency is improved. According to the multi-axis moving platform, the same CCD camera is shared by two machining modes, high-precision real-time monitoring under the double machining modes is achieved, a closed-loop control basis is provided for the laser machining process, and meanwhile, the multi-axis moving platform is matched with the two rotary table assemblies, so that laser machining can be flexibly conducted on a curved-surface workpiece within a large-format range.

The invention relates to a PCB (Printed Circuit Board) defect detection system and method based on an improved YOLO algorithm, the detection system adopts the improved YOLOX algorithm, and by optimizing data enhancement, instability caused by single Mosaic data enhancement is reduced, the precision of a model is improved, and the accuracy of the model is improved. Comprising an image acquisition and processing module, a neural network model improvement module, a model training module, a model verification module and a defect detection module. Meanwhile, the detection method comprises the steps of building a PCB defect data set image acquisition system, acquiring PCB surface defect images as an original data set through an industrial CCD camera, preprocessing the data set images, improving a YOLOX network model, setting parameters of a training model, generating a PCB defect detection model, testing a test set and the like. The defect detection system can realize automatic detection of PCB defects, and has the advantages of low cost, high speed and high precision.

The present invention discloses an in-situ detection device and method for the surface shape of an optical-mechanical component, which belongs to the field of optical precision detection technology, and aims to solve the problem in the prior art that there is a lack of in-situ monitoring and detection of surface shape distortion during the adjustment process of an optical-mechanical component. The laser light generated by the laser in the device is incident on the optical-mechanical component to be measured after passing through a beam isolator, a beam splitter prism, and a collimator A in sequence, and is reflected. The reflected light of the optical-mechanical component to be measured is incident on the beam splitter prism after passing through the collimator A and is reflected. The reflected light of the beam splitter prism is incident on a CCD camera after passing through a perforated light screen, a collimator B, and a phase plate. The CCD camera is connected to a computer system, and the light spot diagram recorded by the CCD camera will be input into the computer system for in-situ detection of the surface shape. The method modulates the reflected light of the sample to be measured by a phase plate, and uses a phase reconstruction algorithm based on light field diffraction iteration to realize sample surface shape reconstruction. It has the advantages of high measurement accuracy, no need for a reference plane, and strong vibration resistance.

The invention relates to the technical field of measurement and automation, in particular to a non-contact wire diameter identification method and system, and the method comprises the steps: enabling a CCD camera and a laser range finder to aim at a remote cable identification target, and obtaining a cable image and the spatial position information of the cable image; inputting the cable image into a trained cable type identification model for feature extraction and classification processing to obtain a cable type, and determining an edge detection preset parameter corresponding to the cable type; edge extraction and contour segmentation are carried out based on the cable image and edge detection preset parameters, and the pixel length of the cable diameter is obtained according to geometric characteristic estimation of the segmented contour; based on the spatial position information of the cable and the pixel length of the diameter of the cable, performing scale conversion from an image to a physical world to obtain the actual length of the diameter of the cable; and based on the actual length of the cable diameter and the cable type, searching a matching item in a preset cable model database to obtain a cable model identification result.

The invention discloses a method for measuring a detection inclination angle of a two-component atomic shearing interferometer. The method comprises the following steps: constructing an inclination angle set of an angle swinging device; when the atoms are acted by the pi Raman laser and the second pi / 2 Raman laser, the reflecting mirror rotates by an angle; alternately detecting multiple groups of odd-numbered groups and even-numbered groups; traversing all dip angles in the dip angle set; and fitting and calculating the actual included angle of the longitudinal direction of the imaging surface of the CCD camera relative to the Z-axis direction. The invention further discloses a measuring device for the detection inclination angle of the two-component atom shearing interferometer. According to the method, an existing atom shearing interferometer can accurately measure the inclination angle of a detection system of the atom shearing interferometer, so that the problems of noise and system errors caused by the fact that the inclination angle of the detection system of the atom shearing interferometer does not return to zero are solved, and drifting of differential measurement of the two-component atom interferometer caused by inclination angle changes is restrained.

The invention discloses full-automatic prism laminating equipment for a mini LED. The full-automatic prism laminating equipment comprises a lower rack, a mounting substrate, a material taking and laminating transverse moving module, a mini LED plate limiting barrier strip mechanism, a mini LED plate material taking and laminating counterpoint lifting module, a mini LED plate counterpoint platform module, a mini LED plate adsorption module, a mini LED plate CCD camera positioning module, a prism jig positioning module and a discharging and transplanting module. The positioning device has the advantages that stepless adjustment of the barrier strip is achieved through a sliding pair of the T-shaped rail groove and the sliding block, a 90-degree bending structure and plum blossom rotary knobs are matched for fastening, a square positioning area capable of being rapidly reconstructed is formed, mini LED plates of different sizes are covered, rapid positioning of the full-size mini LED plates can be achieved, the positioning precision is high, the adjusting efficiency is high, and the clamp does not need to be replaced; a high-precision miniature vertical guide rail and a pressure sensor are integrated in the adsorption module, dynamic buffering is provided through a compression spring, and attachment impact and bubbles are eliminated in combination with vacuum negative pressure adsorption and jacking release of a jacking column.

The invention discloses a correction method and system for laser emission direction adjustment, and relates to the technical field of image processing, and the method comprises the steps: capturing laser spot real-time image data through a CCD camera, extracting a spot region through a U-Net model, and setting a standardized reference region through calculating the side length of a square frame; selecting light spots by using a square frame to establish a relative coordinate system, carrying out gridding processing and positioning the centers of the light spots, and finally converting the light spots into actual coordinates of a world coordinate system; acquiring reflected and transmitted light spot coordinates and light spot position data from the position sensitive detector and the optical fiber sensor, and calculating deviation by using structural projection to obtain a corrected cursor; and a processing plane network model is constructed in the laser correction server, a galvanometer rotation angle set is calculated, laser scanning is executed, and feedback and correction are performed according to the deviation between the actual light spot position and the theoretical positioning point. According to the invention, the light spot region is extracted through the U-Net model, high-precision light spot segmentation is realized under the complex background and noise interference, and the accuracy of light spot positioning is improved.

The invention relates to a water jet attitude detection and calibration device and method, and relates to the technical field of water-guided laser processing and high-pressure water jet cutting. The water jet attitude detection and calibration device comprises an angle adjusting device for adjusting the angle of a processing head; the detection module comprises two groups of correlation type photoelectric sensors, two correlation type photoelectric sensors are longitudinally distributed in each group, one group emits linear light along the X axis of the machine tool, and the other group emits linear light along the Y axis of the machine tool; when the correlation type photoelectric sensor detects that the light intensity reaches a preset light intensity threshold value, a signal is sent out; the value range of the light intensity threshold value is 60%-90% of the initial light intensity; the position adjusting device enables the water jet to pass through two machine tool Y-axis light along the machine tool X-axis and enables the water jet to pass through two machine tool X-axis linear light along the machine tool Y-axis. The correlation type photoelectric sensor is used for replacing the combination of a CCD camera and a sharp mechanical structure, the reaction is more sensitive, the detection efficiency and the detection precision are higher, and the water jet attitude calibration device is suitable for multiple times of rapid water jet attitude calibration under the long-time operation scene of the water-guided laser machine tool.

The invention discloses steel shell battery shell cover welding detection equipment which comprises a rack. The machine frame is provided with a bottom shell circulating conveying line, a bottom shell feeding carrying mechanical arm, a welding mechanism, a CCD camera, a welding jig conveying line, a shell cover carrying mechanical arm, a shell cover feeding mechanical arm, a detection carrying mechanical arm, a welding appearance detection mechanism, a transfer conveying platform, an air tightness detection mechanism, an air tightness detection carrying mechanical arm and a shell overturning and side erecting mechanism. The discharging carrying mechanical arm, the receiving tray conveying line, the welding mechanism and the CCD camera are all arranged on the gantry mounting support, and the welding pressing plate mechanism is arranged below the welding mechanism. The pressing plate mechanism comprises a spot welding pressing plate and a full welding pressing plate, and the spot welding pressing plate and the full welding pressing plate are controlled by a pressing plate transverse movement servo module to move. Spot welding, full welding, appearance detection after welding and air tightness detection of the battery bottom shell and the shell cover can be achieved, the welding and detection processes are completed in a full-automatic mode, and the production efficiency is improved.

The invention belongs to the technical field of monitoring equipment, and discloses a supercritical carbon dioxide contact angle direct monitoring system and method.A first needle valve is connected with the bottom of a high-temperature and high-pressure reaction kettle, the other side of the first needle valve is connected with a supercritical carbon dioxide storage device, and a heater is arranged on the periphery of the columnar high-temperature and high-pressure reaction kettle; a sight glass is arranged on the side face of the high-temperature and high-pressure reaction kettle, a light source is arranged on the left side of the high-temperature and high-pressure reaction kettle, the top of the high-temperature and high-pressure reaction kettle is connected with a second needle valve, the other side of the second needle valve is connected with a water injection pump, and a CCD camera is arranged on the right side of the high-temperature and high-pressure reaction kettle and connected with a computer. The computer is connected with the high-temperature and high-pressure reaction kettle through the temperature sensor and the pressure sensor. According to the invention, the change of the contact angle of the supercritical carbon dioxide can be accurately monitored and analyzed in real time, and an effective tool is provided for researching the wettability of the supercritical carbon dioxide and the effects of anisotropy, cohesiveness, adsorptivity and the like of the surface of a material.

The invention relates to a hard and brittle material large depth-diameter ratio small hole laser milling-precision grinding process and a device thereof.The method comprises the steps that firstly, a mapping relation between an inlet aperture and laser parameters is established through a response surface method, laser machining parameters are determined, and laser machining parameters are obtained on the basis of an optical image acquisition system; a pulse laser is adopted to prepare the large-depth-diameter-ratio micro through hole with the accurate and controllable ablation amount, the grinding amount is reduced, meanwhile, the strength, hardness or fracture toughness of materials at the machining position is reduced, and therefore the grinding force for machining hard and brittle materials and tool abrasion are reduced; and secondly, machining damage such as microcracks, recast layers and taper caused by laser machining is removed through grinding machining, and the machining quality of the small hole with the large depth-diameter ratio is improved. The device mainly comprises a machine body, a workbench, a laser machining main shaft, a grinding machining main shaft, a differential interference difference microscope, an optical CCD camera and an X-axis and Y-axis servo driving module, different machining processes and in-situ detection can be completed on the same machine tool, the problems of secondary clamping, poor repeated positioning precision and the like of workpieces are solved, the machining efficiency is improved, and the machining cost is reduced. According to the method, bottom hole laser machining of the hard and brittle materials is highly combined with grinding hole repairing and hole expanding, high-quality and high-efficiency machining of the hard and brittle materials is achieved, tool abrasion is reduced, and the machining cost is reduced.

The invention discloses a fixing and adjusting device for automatic welding of a robot, and relates to the technical field of automatic welding of robots. The first transmission assembly and the second transmission assembly are combined with the first hydraulic cylinder and the angle adjusting assembly, flexible and accurate three-dimensional space positioning and posture adjusting capacity is provided for a welding structure, the multiple independently-driven robot clamping jaws are provided with floating pressure heads, a pressure sensor and a temperature sensor are integrated, and the welding precision is improved. The clamping state is monitored in real time, stable clamping is ensured, meanwhile, damage is avoided, three-dimensional deformation data of a workpiece are captured in real time through the laser contourgraph and the CCD camera, the controller integrates the data, a welding seam track, the pose of the robot and clamping force, displacement and temperature information fed back by the clamping jaw, and then the adjusting assembly can be driven to conduct pose compensation. Local thermal deformation caused by welding heat input is actively counteracted, and the welding precision, the joint quality and the process stability are improved.

The invention discloses a multi-mode perovskite and laminated cell comprehensive test system and method. The system comprises a darkroom, a test platform, an LED light source module, a CCD camera, a laser, an adjustable constant current source, an electronic load and an upper computer. The darkroom is used for shielding external ambient light and providing a dark test environment; the test platform is installed in the darkroom, and a to-be-tested battery is placed on the test platform; the LED light source module is used for providing a test light source; the CCD camera is used for capturing an optical signal generated by the battery to be tested in the testing process; the laser is used for emitting a laser beam to excite the to-be-detected battery to generate a specific optical response; the adjustable constant current source and the electronic load module can be electrically connected with a to-be-tested battery on the test platform, the adjustable constant current source is used for supplying current to the to-be-tested battery, and the electronic load module is used for simulating different load conditions; and the upper computer is used for realizing intelligent control of the test process and processing and display of test data.

The invention discloses a wiring harness batch automatic plugging device and a control method thereof, a CCD camera, a first clamping jaw and a second clamping jaw are configured on a mechanical arm, the CCD camera is used for identifying a to-be-plugged wiring harness, the first clamping jaw is used for clamping the head end of the to-be-plugged wiring harness, the head end of the to-be-plugged wiring harness is plugged to a first target position on a to-be-wired backboard, and the second clamping jaw is used for clamping the head end of the to-be-plugged wiring harness; and the second clamping jaw is used for clamping the tail end of the to-be-plugged wire harness, carrying the to-be-plugged wire harness to perform routing on the to-be-wired backboard according to a specified track, and plugging the tail end of the to-be-plugged wire harness to a second target position when the to-be-plugged wire harness is routed to the second target position. The technical problems that an existing manual wire harness plugging mode depends on the proficiency of operation technicians, the automation degree is low, and plugging of single-core wires with different wire diameters, different types of terminals and different lengths on various different types of connectors is difficult to achieve are solved.

The invention provides a typesetting and welding all-in-one machine, and belongs to the field of solar cell processing. The device comprises a battery string transfer table, a CCD camera, a grabbing and deviation rectifying mechanism, a material receiving platform, a typesetting module, a front-back pressing module and a brace manufacturing and welding module, the battery string transfer table is arranged at the front end of the material receiving platform, and the grabbing and deviation rectifying mechanism is arranged between the battery string transfer table and the material receiving platform; the CCD camera is arranged on the grabbing deviation rectifying mechanism, the typesetting module and the front-back pressing module are both arranged above the material receiving platform, and the manufactured brace welding module is arranged among the typesetting module, the front-back pressing module and the material receiving platform. Compared with the prior art, an integrated welding mode is adopted, the welding procedures of the bus bars and the battery strings are integrated into integrated equipment through procedure planning, the welding risk is reduced, the welding quality is improved, and the machining efficiency is improved.

The invention provides a high-precision multi-view image recognition detection method based on a CCD camera, and the method comprises the steps: employing a convolutional neural network to extract the noise perception features of each view image through a multi-view image set shot by a CCD camera array; carrying out semantic segmentation by adopting a self-adaptive multi-view semantic segmentation network; constructing final feature representation of the target area based on the enhanced features and the key features; performing view angle consistency matching based on the final feature representation of the target region by adopting similarity calculation; and based on the final target feature map, combining a classification module to identify the defect type, and outputting the type and position information of the defective product. According to the method, the noise removal of the multi-view image is realized through a self-supervised learning method, and the image features under different views are optimized in combination with a self-adaptive semantic segmentation technology, so that the accurate target recognition of the multi-view image is realized.

According to the sorting control system of the flow cytometry sorting instrument, liquid drop images are shot through a camera, and liquid drop states are quantitatively evaluated and monitored on the basis of image content information. In order to determine the liquid drop breaking state, a liquid drop image stroboscopic shooting mode is designed to observe the liquid drop state, and the STM32H7 provides a synchronous control signal. When the droplet generation state is stable, the droplet breaking image is close to a stationary state. The stroboscope lamp is controlled to be turned on at different moments in a period, so that different states of liquid drop generation can be observed. The time difference between the detection time and the charging time is quantitatively determined through liquid drop delay control, and accurate delay control over sorting is achieved. And finally, a full-automatic algorithm is adopted to calibrate the liquid drop time delay, the liquid drop time delay is continuously tried to be changed, and when the shooting brightness of the sorted CCD camera under a certain liquid drop time delay is the highest, the time delay is considered to be the current liquid drop time delay, so that full-automatic calibration of the liquid drop time delay is realized.

The utility model provides a quick detection device for quick type biological indicators, which comprises a shell, a darkroom and a control system, the darkroom and the control system are arranged in the shell, a camera component and a culture room corresponding to the camera component are arranged in the darkroom, a plurality of detection holes for placing the biological indicators are arranged in the culture room, and the detection holes are communicated with the control system. An ultraviolet light source is arranged in the detection hole, a mounting hole corresponding to the detection hole is formed in the cover plate above the darkroom, and an opening is formed in the position, corresponding to the mounting hole, of the shell. According to the utility model, the super-definition starlight CCD camera is adopted to detect fluorescence generated in the biological indicator, the detection speed is high, the accuracy is high, and real-time monitoring and alarming can be realized.

The invention relates to the technical field of air tightness detection, and particularly discloses a corrugated pipe air tightness efficient detection device which comprises a box body and a control console, the upper interior of the box body is divided into a water immersion detection area and a transmission assembly area by a partition plate, and a rotary drum and a cylinder which are axially aligned are arranged in the water immersion detection area and the transmission assembly area respectively; a disc connected with the rotary drum is rotationally arranged in the partition plate, one end of the rotary drum is connected with a driving assembly, a transparent glass plate is arranged on the side wall of the lower end of the water immersion detection area, and a CCD camera right facing the transparent glass plate is arranged on the outer side of the box body; according to the corrugated pipe air tightness efficient detection device, the rotary drum serves as a rotary carrier, whether bubbles are generated on the surface of the corrugated pipe or not is captured through the CCD camera, and then the air tightness of the corrugated pipe is judged according to whether the bubbles exist or not; the whole detection device realizes continuous and automatic detection of the air tightness of the corrugated pipe, and greatly improves the detection efficiency of the air tightness of the corrugated pipe.

The invention discloses a high-resolution angular displacement absolute measurement method and device based on color coding imaging, belongs to the technical field of photoelectric angular displacement measurement, and aims to solve the problems in the prior art. A stepping motor of the device is connected with the center of the back of a circular coded disc, and a bearing of the stepping motor rotates to drive the circular coded disc to rotate; the laser light source and the high-speed CCD camera are placed right in front of the circular coded disc, and the high-speed CCD camera, the stepping motor and the center of the circular coded disc are coaxially placed and are connected with the PC terminal; laser emitted by the laser light source is vertically incident on a coded disc outer ring RGB color block on the front surface of the circular coded disc to form a laser circular light spot as a target detection point; when the stepping motor rotates, the high-speed CCD camera shoots the circular coded disc in real time to obtain a coded disc image signal with a target detection point; and the high-speed CCD camera shoots and stores the image signal in real time and uploads the image signal to the PC terminal for specific demodulation of rotation angle information. The device and the measurement method thereof have the measurement advantages of higher precision and high resolution.

The invention provides a water-guided laser water-light coaxial coupling device and method which are applied to the technical field of laser processing, and the method comprises the steps: analyzing and determining the relative position of the center of a focusing light spot and the center of a water jet nozzle based on a first image, collected by a CCD camera, of the focusing light spot generated near the opening of the water jet nozzle, and then automatically determining swing parameters of coaxially aligning the focusing light spot and the water jet nozzle to the X axis and / or the Y axis of the laser light path two-dimensional swing mirror, and controlling the X axis and / or the Y axis of the laser light path two-dimensional swing mirror to swing through a two-dimensional swing mirror control device according to the determined swing parameters. Therefore, the center of the focusing light spot and the center of the water jet nozzle are adjusted to coincide, water-light coaxial automatic adjustment of the water-guided laser is achieved, the adjustment efficiency is improved, and the accuracy is high.

Performance evaluation and structural optimization methods for a high-power semiconductor laser chip, and a performance evaluation system for a high-power semiconductor laser chip. The performance evaluation method for a high-power semiconductor laser chip comprises: providing a window on an N-side electrode of a chip to be tested (step 1); keeping the chip in an operating state (step 2); allowing a quantum well active region of the chip to generate spontaneous emission, so that the spontaneous emission is imaged outside the chip (step 3); acquiring, by means of a spectrograph, a spectrum of the spontaneous emission outside the chip and obtaining a two-dimensional distribution of a quantum well temperature of the chip in the operating state; and acquiring, by means of a CCD camera, an image of the spontaneous emission imaging outside the chip and obtaining a two-dimensional distribution of charge carriers in the quantum well of the chip in the operating state (step 4). According to the performance evaluation and structural optimization methods for a high-power semiconductor laser chip, the distributions of the temperature and the charge carrier concentration in the quantum well of the chip to be tested in the operating state in which the resolution is freely adjusted can be obtained. Operations of the methods are convenient, and implementation is simple and easy, thereby efficiently improving the accuracy of an evaluation result.

The invention provides a workpiece defect detection method and device based on visual inspection, and the method comprises the steps: obtaining the position information of a to-be-detected workpiece, carrying out the image collection of the to-be-detected workpiece based on the position information, and obtaining a plurality of groups of detection images of the to-be-detected workpiece under different visual inspection conditions; and carrying out workpiece defect detection on the plurality of groups of detection images by adopting a comparison judgment and fusion judgment method. The invention provides a workpiece defect visual detection method based on a CCD camera image, and aims to improve the efficiency and accuracy of workpiece defect detection and prevent visual errors caused by manual detection so as to effectively avoid missing detection and false detection of defective workpieces.