15results about How to "Short exposure time" patented technology

The invention relates to a photoinitiator, a photopolymerization composition and application thereof, and relates to the technical field of photoinitiators, the photoinitiator is a compound with a structure as shown in a formula (1): # imgabs 0 #: 1-2 structures in R1-R8 in the formula (1) are selected from groups as shown in a formula (2) or a formula (3): # imgabs 1 #. The compound provided by the invention still has relatively strong absorption capacity in a dark color system, has high OD (optical density), and can be used for preparing a photoinitiator. The photoinitiator has excellent I-line photosensitivity, and is more matched with the emission spectrum of an ultraviolet light source, so that the photoinitiator is high in photosensitivity, good in solubility, lower in cost and excellent in comprehensive performance, and has excellent application prospects in display, semiconductors and printing ink.

The invention belongs to the technical field of wind tunnel experiments, and discloses a grid-free field-lens-free large-view-field focusing schlieren system. The grid-free field-lens-free large-view-field focusing schlieren system comprises a light source, a small hole, a collimating convex lens, a spectroscope, a model, a focusing convex lens, a knife edge and a scientific camera. Light emitted by the light source passes through the small hole, reaches the collimating convex lens and becomes a quasi-parallel light beam after passing through the collimating convex lens, the light beam passes through the spectroscope, reaches the model, returns to the spectroscope after being reflected by the model and reaches the focusing convex lens after being reflected by the spectroscope, and the focusing convex lens converges the light beam to the knife edge; and finally, focusing the to-be-measured flow field area by the scientific camera and then acquiring a schlieren image. According to the grating-free field-lens-free large-view-field focusing schlieren system, flow field density gradient distribution with small optical path integral effect under the large-view-field condition is obtained in a large wind tunnel, and the grating-free field-lens-free large-view-field focusing schlieren system has engineering practical value.

The invention discloses a construction method of a cover-excavation reverse assembly type underground parking shaft, comprising the following steps: 1. constructing a parking garage shaft cover support pile; 2. constructing a support beam and a cover platform; 3. excavating earthwork; 4. installing a reinforced concrete back plate; 5. installing an assembled three-dimensional steel structure parking space support platform frame; 6. repeatedly constructing multi-layer parking spaces; 7. waterproofing construction, and obtaining a cover-excavation reverse assembly type underground parking shaft. The invention symmetrically opens U-shaped grooves on both sides of the shaft cover support pile and installs a back plate to form the outline of the shaft. In the subsequent downward construction, it is only necessary to install the back plate into the U-shaped groove on the ground, and there is no need to hoist the back plate into the shaft. By constructing a support beam and a cover platform, a cover-excavation reverse construction mode is formed, and each layer of parking space is constructed from top to bottom in sequence, which is beneficial to protecting adjacent buildings and structures. The foundation pit is exposed for a short time, and it is used for urban block construction, with little impact on the surrounding environment, convenient construction, and reduced construction costs.

The invention discloses a rapid AE method, system and device based on an overexposure speckle proportion, and a storage medium. The method comprises the following steps: S1, obtaining a speckle pattern and corresponding exposure time; s2, extracting speckle centers and an adjacent pixel region of each speckle center on the speckle pattern; s3, calculating an average amplitude value of adjacent pixel areas of each speckle center, and determining an overexposure speckle proportion; and S4, judging whether the overexposure speckle proportion is close to an ideal value, performing fine adjustment when the overexposure speckle proportion is close to the ideal value, and performing coarse adjustment when the overexposure speckle proportion is not close to the ideal value. According to the method, the effect of rapid convergence in a short time can be achieved through the speckle pattern.

A fast AE depth camera is characterized in that the fast AE depth camera comprises a speckle projector used for projecting speckles; the receiver is used for receiving reflection signals of the speckles and generating a speckle pattern; the processor is used for extracting a speckle center according to the speckle pattern, calculating an average amplitude value and determining an overexposure speckle proportion; and judging whether the overexposure pixel proportion is close to an ideal value, performing fine adjustment on the exposure parameters when the overexposure pixel proportion is close to the ideal value, and performing coarse adjustment on the exposure parameters when the overexposure pixel proportion is not close to the ideal value. According to the method, the effect of rapid convergence in a short time can be achieved through the speckle pattern.

The application discloses a kind of capturing device and capturing method of transparent board defect shadow image, capturing device is installed in the conveying system for transparent board, capturing device includes: acquisition device, point light source system, curtain, controller;Point light source system and curtain are provided with transparent board to be obtained shadow image between, point light source system and acquisition device are located in the same side of the transparent board to be obtained shadow image, acquisition device is connected with the controller communication;Acquisition device includes multiple area array camera, the field of view of all area array camera covers the width of the transparent board to be obtained shadow image, controller is used to control the exposure timing of acquisition device according to the parameter information of transparent board, and any adjacent area array camera is not exposed simultaneously.The method provided by the application controls the timing of exposure through program, ensures that any two adjacent cameras are at least spaced apart the exposure time required by camera to take a photo to obtain clear defect shadow image.

The invention discloses an image detection method and device for cigarette product end face quality defects, and relates to the technical field of cigarette production quality detection. The device comprises a detection drum wheel, an inner side detection assembly, an outer side detection assembly and an image processing unit, the inner side detection assembly and the outer side detection assembly are respectively fixed through mounting arms, a camera is aligned to the axial direction of a cigarette along the axis of a lens, and the surface of the lens is parallel to the end face of the cigarette. According to the detection method, through drum wheel synchronous pulse positioning, when a cigarette reaches a set phase, inner and outer side LED light supplement and camera photographing are triggered respectively, after an end face image is obtained, shape defects are recognized through contour comparison, and material defects are recognized through traditional material feature recognition or CNN model reasoning. The problems that traditional cigarette end face detection is narrow in coverage and low in precision are solved, comprehensive and high-precision detection of multiple types of defects of the two end faces of the cigarette is achieved, the method is suitable for cigarette making machines of different specifications, and the quality control requirement of modern cigarette production is met.

The invention discloses a rapid AE method, system and device based on an infineon chip and a storage medium. The method comprises the steps that S1, a speckle pattern and corresponding exposure time are acquired; s2, extracting a speckle center on the speckle pattern; s3, calculating an average amplitude value and an overexposure pixel proportion according to the speckle center; and S4, judging whether the overexposure pixel proportion is close to an ideal value, performing fine adjustment when the overexposure pixel proportion is close to the ideal value, and performing coarse adjustment when the overexposure pixel proportion is not close to the ideal value. According to the invention, the speckle pattern based on the infineon chip can achieve the effect of rapid convergence in a short time.

The multi-color light mixing circuit comprises a red light emitting diode light source group, a green light emitting diode light source group, a blue light emitting diode light source group, an energy storage capacitor, a red light NMOS (N-channel Metal Oxide Semiconductor) switching tube, a green light NMOS switching tube, a blue light NMOS switching tube, a red light fly-wheel diode, a green light fly-wheel diode, a blue light fly-wheel diode and a red light choke inductor, and a green light choke inductor and a blue light choke inductor. A three-path simultaneous flashing mode is adopted, in the shutter time of camera exposure, three light sources emit light at the same time, and the amplitude of current flowing through each light source group is adjusted by changing the PWM duty ratio of each branch, so that different light mixing effects are achieved; when the camera is not used for photographing, the camera does not emit light, and flashes for extremely short exposure time when the shutter is pressed, thereby achieving a light supplementing effect. Through the LED flash lamp with the ultra-small size, the photographing effect of the LED normally-on lamp with the power of 50-100 times of the larger size is achieved, the portability is extremely high, and meanwhile the cost of photographing equipment is obviously reduced.

The utility model relates to an integrated photovoltaic power generation and energy storage device which comprises a fixed table, two rotating parts are installed on one side of the top end of the fixed table, a rotating shaft is installed between the two rotating parts, a sliding mechanism is rotationally installed on the rotating shaft, a photovoltaic panel is installed at the top end of the sliding mechanism, and a driving mechanism is installed in the middle of the top end of the fixed table. The top end of the driving mechanism is rotationally connected with the bottom end of the sliding mechanism, energy storage devices are installed in the two sides of the fixing table, fixing mechanisms are installed on the outer sides of the energy storage devices, and the sliding mechanism and the driving mechanism are arranged, so that the inclination angle of the fixing frame is conveniently changed, and then the inclination angle of the photovoltaic panel is controlled; the situation that the inclination angle of the photovoltaic panel is inconvenient to change, so that the time for the photovoltaic panel to be irradiated by the sun is short, and the power generation efficiency of the photovoltaic panel is reduced is avoided; and through the arranged fixing mechanism, the energy storage device in the fixing groove can be conveniently taken out, and the energy storage device can be conveniently replaced.

The present invention provides compositions and methods for sequencing nucleic acids and other applications. In synthetic sequencing, an unlabeled reversible terminator is incorporated by a polymerase in each cycle and then labeled after incorporation by binding a directly or indirectly labeled antibody or other affinity reagent to the reversible terminator.

The present invention provides a method and system for long-distance gas content determination in coal seams, the method comprising: drilling to a target coal seam, withdrawing the drill, installing a closed coring device and sending it to the bottom of the hole; performing a coring operation using the closed coring device and recording a coring time t1 and a coring analysis time t2, thereby obtaining a coal sample for determination, collecting and saving a gas analysis amount W in the closed coring device 21 ; Collect and save the gas analysis amount W before crushing of the coal sample 22 ; crushing the measured coal sample, analyzing and saving the crushed gas analysis amount W3; processing the gas analysis amount W in the closed coring device with preset logic 21 , the gas analysis amount W before crushing 22 The crushed gas analysis amount W3 is used to determine the gas content. The present invention solves the technical problems of large gas content measurement error and short measurement distance.

The invention discloses a rapid AE method, system and device based on an amplitude value, and a storage medium. The method comprises the following steps: S1, obtaining a speckle pattern and corresponding exposure time; s2, extracting speckle centers and an adjacent pixel region of each speckle center on the speckle pattern; s3, calculating an average amplitude value of adjacent pixel areas of each speckle center, and determining an overexposure speckle proportion; and S4, judging whether the overexposure speckle proportion is close to an ideal value or not, performing fine adjustment when the overexposure speckle proportion is close to the ideal value, obtaining an average amplitude value straight line according to the overexposure speckle proportion of the first region of the speckle pattern when the overexposure speckle proportion is not close to the ideal value, and performing coarse adjustment according to the average amplitude value straight line. According to the method, the effect of rapid convergence in a short time can be achieved through the speckle pattern.

The invention discloses an automatic feeding device for polycrystalline alumina fiber spinning colloid preparation, and relates to the technical field of chemical material addition, material addition is carried out by adopting a mode of storing materials in a first hopper and feeding the materials in a second hopper, and the materials are divided into a plurality of feeding batches; the weight change before and after the first hopper outputs the materials and the weight change before and after the second hopper inputs the materials and before and after the materials are output are recorded each time before the last time, the total material adding error obtained before the last time of feeding is obtained from the weight change, and the total amount of the materials needing to be added and the weight of the added materials are combined. According to the automatic feeding device, automatic feeding can be achieved through the discharging switch and the discharging device, errors caused by manual operation are reduced, the exposure time of raw materials is short, and dust exposure and environmental pollution are reduced; through repeated weighing and error feedback control, the raw material adding weight can be more accurately controlled, and the error range is reduced to the maximum extent.

The present invention relates to the field of photolithography manufacturing technology, and in particular to a method and system for improving photoresist packaging technology. The method comprises the following steps: performing surface pretreatment and hydrophobic drying treatment on the surface of a photolithography chip to obtain a hydrophobic surface for photolithography chip adhesion; performing multi-layer photoresist coating and packaging treatment on the hydrophobic surface for photolithography chip adhesion to obtain a chip photoresist coating and packaging layer; performing mask imaging auxiliary alignment and standing wave elimination exposure treatment on the chip photoresist coating and packaging layer to obtain a photoresist packaging standing wave elimination exposure image; performing development curing treatment and defect monitoring on the photoresist packaging standing wave elimination exposure image to obtain photoresist packaging development defect data; performing packaging defect improvement matching on the photoresist packaging development defect data to generate a photoresist packaging defect improvement strategy and perform corresponding photoresist packaging defect improvement operations. The present invention can realize an efficient photoresist packaging improvement process.