138results about How to "Reduced accuracy requirements" patented technology

The invention relates to a system and method for detecting the quality of a metal cap based on machine vision, used for detecting the quality defect of the metal cap and rejecting the inferior quality product. The detection system comprises an optical imaging device, an image processing device, a rejecting device and a conveying belt, wherein the optical imaging device comprises a planar array industrial camera, a first optical detection sensor and a light source; the image processing device is used for processing the image; and the rejecting device comprises a control circuit board, a second optical detection sensor, a solenoid valve and an injection tube. The method for detecting the quality of the metal cap based on machine vision comprises the following steps of: acquiring an interested maximum outline scale of a template cap image; establishing a rotational invariance characteristic template matrix for the template cap image; acquiring a round outline of the cap to be detected according to the interested maximum outline scale; calculating the rotational invariance characteristic matrix in the coverage of the round outline of the cap to be detected; and matching the rotational invariance characteristic matrix with the rotational invariance characteristic template matrix, so as to judge whether the cap to be detected is a qualified product or an inferior product.

The invention provides a method and device for pushing mobile internet content based on user preference for obtaining internet content preference information of a user according to access of the user and pushing pointed content to the user according to the preference information. The method for pushing the mobile internet content based on the user preference comprises the steps that first information to which the user has access is obtained according to the access behavior of the user; the network content relevant to the first information is classified to obtain second information; the preference of the user is graded according to the second information to obtain the preference information of the user, and the network content corresponding to the preference information is pushed to the corresponding user according to the preference information. By means of the technical scheme, the preference information of the user is obtained through the network, the potential customers can be located according to the preference information, and the efficiency of popularizing the network service is improved.

The invention relates to an input method. Based on a directional dot-dash input technology, touch tracks of 52 directional dots and dashes are optimized and are respectively expressed by using 52 directional dot-dash symbols; 52 times of touch tracks are expressed by one or n logic input partitions based on a touch screen; meanwhile, the corresponding relation between each directional dot-dash symbol and various candidate set symbols (comprising character symbols and function symbols) is allowed to be freely set, the corresponding candidate set symbols can be outputted after specified directional dot-dash symbols are inputted. According to the input method disclosed by the invention, off-screen touch typing of touch screen input is realized for the first time, so that the accuracy of dot-dash input can be ensured and the diversification of input contents can be met; in addition, the input method has the advantages of simple algorithm, high response speed and low power consumption. Bases on a 10-key Pinyin input method disclosed by the invention, at most 520 symbols (including initial consonants and compound vowels of Pinyin, simplicity, Pinyin auxiliary codes, strokes of Chinese Characters, English letters, number, punctuation symbols and the like) can be simultaneously input without switching an interface; in addition, each kind of symbol at most slide for the length of two key positions.

The invention discloses an ultra-low frequency dielectric loss-based DC cable extrusion insulation aging state evaluation method, wherein the extrusion type solid insulation of a DC cable is adopted as a research object. The method comprises the following steps of preparing an insulated inner-layer slice sample, an insulated intermediate-layer slice sample and an insulated outer-layer slice sample of a cable; according to the rated operating voltage of the cable and the dimension parameters of the cable, determining a measurement voltage; measuring the dielectric loss of slice samples under different voltages at a frequency of 0.1 Hz; processing measurement data and preparing a dielectric loss-voltage graph in a normalized coordinate system; according to the dielectric loss values of the inner and outer layers of the dielectric loss-voltage graph and the varying trend thereof along with the application of an externally applied voltage, evaluating the extrusion insulation aging state of the DC cable. According to the technical scheme of the invention, the extrusion insulation aging state of the DC cable can be accurately evaluated, so that the real-time state of the extrusion type DC cable can be effectively determined. Meanwhile, the method is small in test sample size, and low in requirement on the voltage and the capacity of a test instrument. The influence of the test instrument on the system error is reduced. The requirement on the accuracy of the test instrument is lowered. Meanwhile, the data of the method are free from being compared with historical data, so that the method can be used for evaluating the cable state, wherein original data are missed.

The invention relates to a dense array concentrating solar energy photovoltaic device, and belongs to the field of photovoltaic. The dense array concentrating solar energy photovoltaic device comprises a Fresnel lens array, a plane substrate and at least two photo cells, wherein the Fresnel lens array is arranged at a top layer and is an integrated lens; the upper surface of the Fresnel lens is a plane and the lower surface of the Fresnel lens is provided with at least two groups of concentric ring-shaped saw teeth; each group of concentric ring-shaped saw teeth forms a Fresnel lens; the Fresnel lenses are arranged in an array mode; the plane substrate is arranged at a bottom layer; the at least two photo cells are arranged on the upper surface of the plane substrate and in a photo cell array mode; the number of the photo cells in the photo cell array is the same as the number of the Fresnel lens in the Fresnel lens array; and each photo cell corresponds to one Fresnel lens. The array concentrating solar energy photovoltaic device is simple in heat dissipation, short in concentrating focus and high in solar energy utilization rate, and does not require electrode arrangement inside a photo cell chip.

The invention discloses a method for manufacturing a selective emitter battery. The method comprises the following steps of: providing a semiconductor substrate; flocking on the semiconductor substrate; performing diffusion and doping on the semiconductor substrate and forming a diffusion layer on the front face of the semiconductor substrate, wherein the diffusion layer comprises a high-doping-concentration layer on a surface layer and a low-doping-concentration layer on an inner layer; trimming the diffused semiconductor substrate; forming a silver paste electrode which corresponds to a grid line on the surface of the diffusion layer and forming a back electrode and a back electric field at the bottom of the semiconductor substrate; plating a conductive metal on the surface of the silver paste electrode; etching and removing the high-doping-concentration layer exposed on the front face of the semiconductor substrate by taking the conductive metal as a mask; depositing an anti-reflective film on the front face of the semiconductor substrate; and removing the anti-reflective film on the top surface of a part to be subjected to electrode welding of the conductive metal. In the method, the conductive metal is plated on the silver paste electrode and is taken as the mask for removing the high-doping-concentration layer, so that the requirement for the equipment accuracy is lowered and the production yield of an SE (Spray Etching) battery is increased.

The embodiment of the invention relates to the field of data processing, and discloses a battery replacement method, a battery replacement robot and a storage medium. In some embodiments of the invention, the method for replacing the battery comprises the following steps: in response to a first battery replacement instruction, moving to a first preset position along a first track line on the ground; wherein the first preset position is determined according to the parking position of the electric vehicle; shooting first image data in a first direction; according to the position information of the mark in the first image data, adjusting the position of the first image data to enable the relative position relationship between the first image data and a to-be-replaced battery of the electric vehicle to accord with a preset first position relationship; and replacing a to-be-replaced battery of the electric vehicle with a replacement battery. While the calculation loss is reduced, the positioning accuracy of the battery replacing robot is ensured, the putting and maintenance cost of the battery replacing station is reduced, the requirement for the accuracy of the parking position of theelectric vehicle is reduced, and the customer experience is improved.

The invention relates to an image processing method and device. The method comprises the steps that a first image is acquired, and the first image includes a first user region and a first background region; vitrification processing is performed in the first background region so that the processed first image is acquired; preview graphs of the processed first image and a second image are displayed through intelligent equipment, the second image includes a second user and a second background region, and the first background region and the second background region are corresponding to the same scene; image feature matching is performed by utilizing the first background region and the second background region, the preview graphs of the first image and the second image are enabled to be consistent through adjustment, and photographing of the second image is prompted; and a main image is selected from the first image and the second image and the user region is automatically extracted from the image which is not selected, and the extracted user region is integrated in the main image so that a group photograph is obtained. The group photograph obtained through the scheme is enabled to be more realistic.

The invention discloses a scattering imaging device based on deep learning. The scattering imaging device comprises a collimated light source, a first lens, a second lens, a linear polarizing film, aspatial light modulator, a beam splitter, a third lens, a scattering medium, a photoelectric detector and an image reconstruction module; the collimation light source, the first lens, the second lens,the linear polarizing film and the beam splitter are sequentially arranged along a first optical axis. The spatial light modulator, the third lens, the scattering medium and the photoelectric detector are arranged along a second optical axis, the first optical axis and the second optical axis intersect at the beam splitter, the second optical axis is perpendicular to the direction of the first optical axis, and the scattering medium is arranged on the focal plane of the third lens; and the image reconstruction module is used for reconstructing a speckle image according to the speckle information recorded by the photoelectric detector. The optical path structure is simple, the requirement for the accuracy of the optical path is not high, and the constructed neural network can automaticallycompensate for various errors existing in the optical path.

The invention discloses an operation method of a virtual keyboard and a head-mounted display device. The operation method comprises a step of displaying the virtual keyboard on a display screen of thehead-mounted display device, a step of detecting whether a first sliding operation that an operating body slides from a first position to a second position exists or not, and a step of determining afirst selectable area corresponding to a first direction in the virtual keyboard as a selected area at least according to the first direction indicated by the first sliding operation when the first sliding operation exists. Since a technical solution for determining the selected area of the virtual keyboard according to the direction indicated when the operating body performs the sliding operation is employed and the sliding operation has a directionality of carrying out clear distinguishing, while the accuracy can be ensured, the requirements for accuracy in a user operation are reduced, therefore, the input speed can be increased, the input efficiency is improved, the need for a user to frequently shake the head during the operation of the virtual keyboard is avoided, and a defect thateasily causes the neck fatigue of the user is eliminated.

The invention discloses an initial velocity measuring device for an X-ray light screen. The device comprises a front X-ray light screen, a rear X-ray light screen, a probe, a front X-ray processing circuit, a rear X-ray processing circuit, a front X-ray light screen velocity processing module, a rear X-ray light screen velocity processing module and an average velocity calculation module. The probe is arranged on a gun barrel; the front X-ray light screen and the rear X-ray light screen are arranged on a projectile firing line; the front X-ray light screen is connected with the front X-ray processing circuit; the front X-ray light screen velocity processing module is connected with the front X-ray processing circuit and the average velocity calculation module; the rear X-ray light screen is connected with the rear X-ray processing circuit; and the rear X-ray light screen velocity processing module is connected with the rear X-ray processing circuit and the average velocity calculation module. An effective target-passing signal of the projectile can be captured accurately in an aftereffect region of bouche firing; and an instantaneous velocity of the projectile flying past two front and rear light screen targets as well as an average velocity of the projectile passing through the centers of the two light screen targets can be calculated based on the effective target-passing signal obtained by measurement.

The invention discloses methods for distance measurement and offset measurement with a single camera and for realizing naked eye 3D grating adjustment. The method for distance measurement and offset measurement comprises a step of standard data acquisition, a step of current user data acquisition and a step of calculation of distance and offset so as to finally calculate watching distance and horizontal offset of a current user. The method for realizing naked eye 3D grating adjustment is characterized in that distance D and offset H are measured by using the method for distance measurement and offset measurement, each group of gratings is switched to acquire grafting shielding angles and offset of an optimal view of two groups of gratings with different sampling distances, a human eye included angle A is calculated through the formula that A is equal to arcsin(D/H) based on the distance D and the offset H, and based on the value of the human eye included angle A and the data of the optimal view of the two groups of gratings with different sampling distances obtained in the step of standard data acquisition, gratings are selected and the grafting shielding angles and the offset of the gratings are adjusted so as to obtain an optimal visual state. Such a technical scheme is applicable to distance measurement and offset measurement when a single person watches naked-eye 3D hand-held equipment.

The invention discloses a conveying line for conveying workpieces alternately, comprising a conveying mechanism and a centering mechanism. The conveying mechanism includes a left conveyor belt group and a right conveyor belt group distributed side by side; the centering mechanism includes a left conveyor belt set on the left rear conveyor belt. The centering mechanism and the right centering mechanism arranged on the right rear conveyor belt, the left centering mechanism and the right centering mechanism both include a fixing frame, two gripping hands slidably connected with the fixing frame and in opposite directions of travel, and a driving gripping hand Linear motion cylinder; the left and right conveyor belt groups are respectively provided with left and right lifting baffles that can be raised and lowered, and the left and right lifting baffles are alternately raised and blocked to realize the alternate transportation of workpieces, and through the centering mechanism The mutual movement of the two grippers clamps the workpiece, realizes the correction of the position and angle of the workpiece, and improves the accuracy of conveying the workpiece.

The invention discloses a drilling machine system based on dynamic control of a tool face of a self-adaptive downhole drilling tool and a well drilling method. The drilling machine system comprises a dynamic control system and a well drilling system, the dynamic control system comprises a data collection system, a control strategy input module, a well drilling model information input module, a multi-body dynamics modeling module, a self-adaptive model correction module, a tool face estimation module, a control rule generation module, an execution module and a danger state judgment module. A user inputs a control strategy and a well drilling model, the data collection module collects system drilling condition, the multi-body dynamics modeling module performs multi-body dynamics modeling on the basis of the well drilling model, the self-adaptive model correction module corrects a multi-body dynamics model on the basis of the drilling condition, the tool face estimation module and the control rule generation module calculate control rules for controlling the execution module on the basis of the control strategy, the drilling condition and the multi-body dynamics model after being corrected, and the danger state judgment module gives out an alarm when the system is in a danger state. The drilling machine system can remarkably improve well drilling efficiency and accuracy and can be widely used for downhole directional drilling.

The invention discloses a radiation refrigeration composite coating with structural color, application and a preparation method. The radiation refrigeration composite coating comprises a base layer, and reflection nanoparticles and color forming nanoparticles embedded in the base layer, wherein a reflection valley jointly realized by broadband high reflection of the reflection nanoparticles and local plasmon resonance of the color forming nanoparticles presents the structural color of the radiation refrigeration composite coating. The radiation refrigeration composite coating has relatively strong reflecting capacity in a sunlight wave band (0.3-4 microns), and the reflectivity in most of the sunlight wave bands is up to 0.95. The emissivity in the infrared band (4-24 [mu] m) can be continuously 0.9 or above, and the emissivity in most of the infrared bands can be up to 0.95. The invention can overcome the problem of limited application occasion due to single color of the existing radiation refrigeration coating, thereby having broad application prospects in the fields of building energy saving, surface heat management of outdoor objects and electronic products and the like.

The embodiment of the invention relates to the field of data processing, and discloses a battery replacement method and system, a battery replacement robot and a storage medium, the battery replacement method comprises the following steps: in response to a battery replacement instruction, moving to a first preset position along a first magnetic stripe trajectory on the ground, the first preset position being determined by the position of a parking area; shooting a first image in the first direction, obtaining first position information of a battery to be replaced according to the first image,the battery to be replaced being located on the electric vehicle, and the electric vehicle being located in the parking area; and adjusting the position according to the first position information until the relative position relationship with the to-be-replaced battery conforms to a preset first position relationship, and replacing the to-be-replaced battery. According to the battery replacement method and system, the battery replacement robot and the storage medium provided by the invention, while the calculation loss is reduced, the positioning accuracy of the battery replacement robot is ensured, the putting and maintenance cost of the battery replacement station is reduced, the requirement on the accuracy of the parking position of the electric vehicle is reduced, and the customer experience is improved.

The invention discloses a modified parallel full color organic electroluminescent display unit and the making method thereof, mainly arranging a first organic light emitting unit in the vertical extending position of the first color photoetching glue on a color filter, arranging a second organic light emitting unit in the vertical extending position of the second color photoetching glue, arranging a third organic light emitting unit in the vertical extending position of the third color photoetching glue, forming a fourth organic light emitting unit in the vertical extending position of the first, second and third color photoetching glues, filtering light sources of various colors of the organic electroluminescent unit by the color filter and arranging these light sources in groups, thus achieving the purpose of full color.

The invention discloses a control system of solar AC charging piles based on an HCS08 single-chip microcomputer. The control system uses the HCS08 single-chip microcomputer produced by Freescale as acontroller, and mainly consists of a power supply module, a drive module, a control guiding module, a communication module and a voltage and current detection module. The control system can make corresponding protection and alarm actions according to various conditions occurring in the charging process of electric vehicles. A low-voltage system adopts a two-circuit power supply mode, so that the control system can be powered not only by a power grid but also by a solar panel and a storage battery; and the power supply mode of the low-voltage system can be automatically switched according to the voltage of the storage battery. The AC charging piles in the standby state display the standby state by indicator lights instead of an LCD screen, thereby further reducing the standby power consumption of the AC charging piles. The control system optimizes PWM output and a detection circuit, and effectively reduces the communication error between the AC charging piles and vehicle-mounted chargers.