36results about How to "Reduce light requirements" patented technology

A high performance zoom lens system suitable for use with a camera is disclosed. The zoom lens systems employs liquid optics and a movable lens group to provide optical performance over the zoom focal length range at focus distances from close to infinity. The system also provides compensation for undesirable thermally induced effects by adjustments of the zoom group and the variably shaped optical surface in the liquid lens cell.

The invention discloses an in-water color particle image velocimetry system comprising a river project model, color tracer particles, a color web camera, a POE (power over Ethernet) switch and a digital image processing device. The color tracer particles are evenly distributed in water flow of the river project model, the web camera mounted above a surface of the water flow of the river project model is connected with the POE switch connected with the digital image processing device comprising digital imaging processing software. The invention further provides a color particle image velocimetry measuring method. By the arrangement, the technical problems that a black and white video camera sets higher requirements for light condition and is prone to being affected by light noises, more error vectors appear in flow field data, so that measuring accuracy is affected are solved.

The invention discloses a PCB welding defect detecting method based on depth information. The method comprises the following steps that depth data of a to-be-detected PCB welding area and depth data of a standard PCB welding area are collected respectively; corresponding depth images are generated according to the depth data of the two PCB welding areas respectively; standard welding images are obtained according to standard depth images, and to-be-detected welding images are obtained according to to-be-detected depth images; the standard welding images and the to-be-detected welding images are subjected to image registration; soldering positions are marked in the to-be-detected welding images, and whether or not soldering positions need pin protruding is judged according to ratio operation values of the soldering positions; the registered standard welding images and to-be-detected welding images are subjected to image differentiate operation to obtain binary images; PCB welding defects are determined according to the binary images. The PCB welding defect detecting method based on the depth information has the advantages that the amount of processed data can be reduced, the requirements for illumination conditions are low, and the false detection rate can be reduced.

The invention discloses a PCB defect detection method based on depth information. The method comprises: acquiring depth data of a PCB to be detected and depth data of a standard PCB; Respectively generating corresponding depth images according to the depth data of the two PCBs; Obtaining a standard image according to the depth image of the standard PCB, and obtaining a to-be-detected image according to the depth image of the to-be-detected PCB; Performing image registration on the standard image and the to-be-detected image; Performing image difference operation on the registered standard image and the to-be-detected image to obtain a binary image; According to the method, the PCB is subjected to three-dimensional scanning through line laser, the depth information of the PCB is obtained, the data size needing to be processed is reduced, the requirement for illumination conditions is low, and the false detection rate can be reduced through three-dimensional depth data processing.

A light emitting diode packaging structure includes a package body, a red LED chip, a blue LED chip, a green LED chip, a package material and a yellow phosphor. Three LED chips are disposed within an accommodating room of the body package and covered by the package material. The yellow phosphor is uniformly mixed with the package material. A white light is formed by a mix of three types of light from the LED chips. Additionally, a yellow light which is generated from the excitement of the yellow phosphor with the blue light is mixed with a part of the blue light to further form the white light.

The invention discloses a novel multifunctional electronic float and an implementation method thereof, belonging to the field of the electron. The float comprises a float body 1 and a control box 2, wherein the interior of the float body 1 integrates a microbattery module 3, a microsensor module 4, a first signal acquiring and processing module 5, a first wireless communication module 6 and a first indicator light module 7; and the control box 2 consists of a battery module 8, a sound module 9, a second signal acquiring and processing module 10, a second wireless communication module 11, a second indicator light module 12 and a vibration module 13. The multifunctional electronic float adopts the microsensor to acquire the acceleration, the pressure and the temperature signals of the floatin water, utilizes advanced information technology to process and transmit the signals and finally finishes prompting and alarming through sound, light and vibration signals. The multifunctional electronic float not only solves the fishing problems under unfavorable float observation conditions of long distance, night fishing, and the like of wide fishing lovers, lowers the requirements for fishing skills of fishing people and improves the entertainment and the participatory of the fishing sport.

The invention provides a parking space identification method and device by using a laser light knife as an auxiliary light source. The device is composed of the laser light knife, a camera, a computer and display equipment. When detection is needed, the computer gives out a control instruction first, the laser light knife is used for emitting a fan beam, and the fan beam is projected to a whole row of parking spaces to be detected to form a straight line beam which penetrates through the whole row of parking spaces transversely; the camera is used for collecting the beam images formed by the laser light knife on all the parking spaces, if one image is a section of straight line, it means that the corresponding parking space is vacant, and if the image is a section of arc placed above the straight line, it means that the corresponding parking space is occupied. The parking space identification device can be used for detecting one row of parking spaces, the image processing algorithm is simple and reliable, meanwhile, the requirement for lighting conditions is lowered, and normal detection can still be conducted even in an all-black underground parking garage.

The invention discloses a photocatalyst deodorant and a preparation method thereof. The photocatalyst deodorant comprises, by weight, 5-10 parts of nanometer titanium dioxide, 1-3 parts of anion powder, 1-2 parts of phosphoric acid, 1-5 parts of penetrating agents, 1-5 parts of dispersing agents, 5-10 parts of sodium bicarbonate, 70-90 parts of deionized water, 3-5 parts of aloe gel and 10-15 parts of tea polyphenol. The invention further discloses the preparation method of the photocatalyst deodorant, and through adsorption and degradation of a super catalyst indium phosphate in the night orin a dark condition, requirements on light condition can be reduced.

The invention provides an intelligent cigarette packaging box which is used for packaging a box body of cigarettes. An electronic tag is arranged on the box body, the electronic tag is provided with a protecting pad, the protecting pad is arranged on the electronic tag in a covering mode, and the protecting pad is fixedly connected with the box body. According to the intelligent cigarette packaging box, the electronic tag is arranged on the box body, reading and writing can be conducted repeatedly on stored content of the electronic tag through a reader-writer, and therefore the cigarette packaging box can be repeatedly used according to packaged cigarettes, batch reading can be conducted on the content of multiple electronic tags through the reader-writer by using the electronic tag, the requirements for distances and light are low, the labor intensity of workers can be effectively lowered, working efficiency is improved, the advantages that the storage information amount is large, and information can not be lost easily are achieved for the electronic tag, and therefore the demand of the modern cigarette logistics field can be effectively met.

The invention discloses a modified starch degradable mulching film with good light transmittance performance. The modified starch degradable mulching film is prepared from the following raw materials in parts by weight: 64-70 parts of dry basis corn starch, 23-26 parts of ethyl alcohol, 11-15 parts of monochloro acetic acid, 14-16 parts of silicon dioxide, 0.08-0.1 part of epoxy chloropropane, 0.5-1 part of ultraviolet light absorber, 4-5 parts of superfine calcium carbonate, 2-3 parts of polyoxyethylene wax, 16-20 parts of papermaking waste liquor, 0.1-0.2 part of silane coupling agent, 0.2-0.3 part of antioxygen 1010, 2-3 parts of Arabic gum, 60-80 parts of dimethylformamide, a proper quantity of 85% ethanol solution and a proper quantity of deionized water. The agricultural mulching film with the light transmittance has the advantages of simple preparation technology, good toughness, high strength, excellent light transmittance performance and good environment protection performance, meets the requirements of crops on illumination, does not damage soil and is worth popularizing.

The invention relates to intelligent body measurement, and belongs to the field of human body measurement. An intelligent body measurement device is characterized by comprising a plurality of stand columns, one or more body sensing collectors is or are arranged on every stand column, processors are connected to all the body sensing collectors, all the processors are connected with an upper computer, the body sensing collectors send a part of collected human-body RGB three-dimensional point cloud data to the upper computer through the processors, and a received data set is converted into whole human-body three-dimensional point cloud data through the upper computer. The intelligent body measurement device is compared with an existing laser scanning device and the like, the cost is low, the requirements for environment illumination are low in the body measurement process, and the specific illumination environment is not required; compared with three-dimensional model building data of infrared or photographs, the data is more accurate, the universality is wide, the applicability is high, and the intelligent body measurement device can be widely used for remotely accurate human body measurement.

The invention discloses a method for estimating the shield gap of a shield machine based on a convolutional neural network. The partial image of the segment with laser calibration points is transmitted to the computer, and the image super-resolution reconstruction method based on the convolutional neural network is used to perform super-resolution reconstruction on the collected image to obtain a high-resolution image. The image processing algorithm analyzes, processes and calculates the collected images to obtain the size of the shield-tail gap, thereby realizing non-contact automatic measurement. The invention realizes the automatic measurement of the shield tail gap, reduces the requirement of illumination in the shield environment, enables the automatic measurement of the shield gap of the shield to be used in the whole cycle of the shield, and helps to realize the precision and accuracy of the shield construction. automation.

The invention relates to a quick-charging circuit of a solar lead-acid storage battery. The quick-charging circuit comprises an input portion, a voltage stabilization module, a charging control circuit, a main charging circuit and a charging mode selection and indicating lamp circuit, wherein the input portion comprises a solar panel and a transformer rectifier circuit, a mains supply is connected with the transformer rectifier circuit and the selection switch for output, output of the input portion is connected with a voltage stabilization circuit, output of the voltage stabilization circuit is connected with the main charging circuit, the charging mode selection and indicating lamp circuit is connected with the charging control circuit and transmits a charging selection mode into a core chip of the charging control circuit, the core chip outputs pulse-width modulation (PWM) control signals to the main charging circuit to control charging, and the main charging circuit outputs to the lead-acid storage battery for charging. The lead-acid storage battery can be charged quickly and protected through solar energy or the mains supply, three charging modes such as second-order voltage, second-order current and pulses can be selected, the charging speed is fast, the loss is low, and the service life of the lead-acid storage battery can be effectively prolonged.

The invention provides a vein-based identity authentication method and a wristband. According to the method, dynamic vision sensors are adopted to collect vein features, and the dynamic vision sensorsare line array dynamic vision sensors; a vein feature collector comprises two line array dynamic vision sensors, the two line array motion dynamic vision sensors are perpendicular to each other in across shape, images collected by the dynamic vision sensors only contain effective information such as vein features and the like, and do not contain non-effective background information such as redundant skin and the like, after vein feature images are received, compared with a deep learning algorithm based on an ordinary vision sensor, only a few layers are needed to calculate vein feature vectors, which can greatly reduce the calculation amount of image processing, the power consumption is reduced, the method is suitable for integration, and the recognition effect is good.

The invention discloses an indoor raising method for bean aphids. The method includes the steps of seedling culture of red beans and propagation expanding of the bean aphids. The seedling culture of the red beans includes the steps of preparation of bean seed soaking liquid, soaking of bean seeds, germination accelerating, seedling culture and the like. The propagation expanding of the bean aphids includes the steps of inoculation of the bean aphids, propagation expanding of seed-source bean aphids, propagation expanding of the bean aphids for propagating natural enemies, and the like. By means of the method, the requirements on temperature, humidity and illumination are not high, a fiber cloth seedling culture substrate is adopted during seedling culture, time is greatly saved, the seedling culture and seedling period management cost is greatly reduced, and good economic benefits and social benefits are achieved.

The invention discloses a focusing system, method and device, and belongs to the technical field of communication. The focusing system comprises a sensor, a transmitting plate and a focusing module, signal transmitting units which are arranged in an array mode are arranged on the transmitting plate, and the frequencies of transmitting signals transmitted by the signal transmitting units are different, wherein the signal emission unit is configured to send an emission signal to a first surface of a shooting object after a camera is started; the sensor is configured to determine a measurement distance between each position point of the first surface and the camera based on the transmitting frequency of the transmitting signals and the reflecting frequency of the reflecting signals after receiving the reflecting signals corresponding to the plurality of transmitting signals; and the focusing module is configured to focus the shooting object according to the plurality of measurement distances. According to the invention, the focusing accuracy can be improved on the basis of rapid focusing.

The invented method includes the following steps: forming flowing liquid film on the analogue demonstration equipment, injecting colouring agent into colouring device, inserting the inserter of colouring device into liquid film to colour the liquid film, utilizing general light source to directly irradiate liquid film and utilizing observation equipment to observe fluid phenomenon. The invented colouring device includes container, soft tube and inserter.

The invention relates to a method for personnel trace extraction by utilizing image collecting and processing technology. The method mainly includes the steps of image collection, image registration, interested area creating, differential signal thresholding and ecological processing, wherein positioning detection and description of feature points are realized by utilizing a graphic local invariant feature extracting method during image registration; an interested area is created by utilizing a gradient field and a direction field of an integral image to determine trace texture and background image and then utilizing gray level; differential image thresholding refers to solving a maximum threshold value of the interested area through an OSTU algorithm and binarizing according to the maximum threshold value; ecological processing is performed finally. By the personnel trace extraction method, operation quantity can be reduced, and extraction accuracy can be improved; the personnel trace extraction method is suitable for various personnel traces, thereby being high in applicability.

The invention discloses an in-water color particle image velocimetry system comprising a river project model, color tracer particles, a color web camera, a POE (power over Ethernet) switch and a digital image processing device. The color tracer particles are evenly distributed in water flow of the river project model, the web camera mounted above a surface of the water flow of the river project model is connected with the POE switch connected with the digital image processing device comprising digital imaging processing software. The invention further provides a color particle image velocimetry measuring method. By the arrangement, the technical problems that a black and white video camera sets higher requirements for light condition and is prone to being affected by light noises, more error vectors appear in flow field data, so that measuring accuracy is affected are solved.

The present invention provides a PCB (Printed Circuit Board) graph spindle direction calculation method. The method comprises the steps of: performing binaryzation processing of all the pixel points of a PCB image corresponding to a preset fixed threshold value to obtain pixel values of all the pixel points; according to the pixel values of all the pixel points, calculating contour points of a target graph in the PCB image; calculating the contour center of gravity of all the contour points in the target graph; according to the contour center of gravity and the contour points, calculating thesecond-order center distance of the target graph; and according to the second-order center distance of the target graph, calculating and obtaining the spindle direction of the target graph. The PCB graph spindle direction calculation method employs a binaryzation method and the contour points to calculate the spindle direction of the PCB graph so as to greatly improve the calculation efficiency ofthe spindle direction of the PCB graph.

The invention discloses a water flow velocity measurement method based on a motion enhancement feature, and the method comprises the following steps: collecting and framing water flow video data, calculating a frame difference image through employing a frame difference method, counting disturbance noise, filtering the disturbance noise, enhancing the filtered image through employing a histogram equalization method, generating a water flow feature displacement, dynamically filtering water flow vector outliers, estimating a water flow velocity value, performing filtering, enhancement and secondary difference on continuous multiple frames of continuous water flow images to obtain an intermediate result after motion is remarkably amplified, performing corner detection and constrained matching on the intermediate result, and performing optimization on a continuous statistical result. A good real-time measurement effect can be obtained, and finally, a classification model trained by a collected reference object data set is utilized to further ensure the reliability of a reference point selected for flow velocity estimation. The method can play a role in a more universal water body environment and a weaker light environment, and is easy for landing use of hydrological intelligent monitoring engineering.

The invention discloses a method for indoor propagation of bean aphids. The method comprises raising red bean seedlings and multiplying bean aphids. The red bean seedling raising includes the steps of preparing soaking liquid for bean seeds, soaking bean seeds, accelerating germination, raising seedlings, and the like. The propagation of soybean aphid includes steps such as the inoculation of soybean aphid, the propagation of soybean aphid of provenance, and the propagation of soybean aphid for breeding natural enemies. The method used in the present invention has low requirements on temperature, humidity and light, and fiber cloth is used to maintain the humidity of the seedling raising substrate during seedling raising.

The invention discloses a silicon-tungsten polyoxometallate doped ferric oxide composite nano catalytic material with an inorganic structure as well as preparation and application thereof, and relates to a catalytic material as well as preparation and application thereof. The invention aims to solve the problem that the catalytic efficiency is low when polyoxometallate catalyzes and degrades organic matters which are difficult to degrade at present. The invention discloses synthesis and characterization of a composite material Co2Co4 (SiW10O37) 2 / Fe2O3 synthesized by a eutectic method and degradation of a methyl orange solution by the composite material Co2Co4 (SiW10O37) 2 / Fe2O3. The influence of different synthesis pH conditions on the polyoxometallate and the composite material is explored, and the optimal synthesis condition of the composite material is determined. Photocatalysis experiment results show that the composite material has the best catalysis effect on target dye when the pH is 1 and the concentration of methyl orange is 10 mg / L, and after a photocatalysis reaction, the degradation rate of methyl orange can reach 76.2%. The method is applied to the field of sewage treatment.

The invention discloses an ID card information analysis method based on picture cutting technology, comprising the following specific steps: acquiring ID card image, uploading ID card image, matrix processing, ID card fixed position cutting, image format conversion, and calculating brightness value Minimum average value, binarization processing, image inversion, ID number information cutting, digital template production, ID number information acquisition, according to the ID number information calculation formula, obtain address, date of birth and gender information, and store them . The present invention has very fast processing speed, high efficiency, and low requirement for light. No matter where the light intensity is, it can realize photographing and analysis. It has strong applicability, and is very beneficial for population registration and census. It is more accurate and faster, and saves the tedious work of repeated cutting and repeated checking in the past.

The invention discloses an efficient thin-film photovoltaic cell and belongs to the technical field of photovoltaic cells. According to the efficient thin-film photovoltaic cell of the invention, an environmentally-friendly, low-cost and abundant magnesium silicide (Mg2Si) material is adopted to make a light absorbing layer (i) which is arranged in a traditional pn-type silicon-based photovoltaic cell, such that a photovoltaic cell with a wide (p) / narrow(i) / wide (n)-type energy band structure can be formed, and therefore, light absorption efficiency and photoelectric conversion performance can be greatly improved; the Mg2Si is a semiconductor with a face-centered cubic structure and is mainly composed of raw materials of silicon and magnesium which are non-toxic and free of pollution and are elements among the elements having highest storage quantity on the earth, and therefore, the Mg2Si is a kind of environmentally-friendly, low-cost and abundant material; as silicon, the magnesium silicide (Mg2Si) is a kind of semiconductor having an indirect-transition bandgap characteristic, while, the band gap width of the magnesium silicide (Mg2Si) is smaller than that of the silicon (0.7eV), and the light absorption coefficient of the magnesium silicide (Mg2Si) is three orders of magnitude higher than that of the silicon, and therefore, the thickness of the material can be reduced to a level under a micrometer level.