53results about How to "No occlusion" patented technology

The invention relates to a dynamic target position and attitude measurement method based on monocular vision at the tail end of a mechanical arm and belongs to the field of vision measurement. The method comprises the following steps: firstly calibrating with a video camera and calibrating with hands and eyes; then shooting two pictures with the video camera, extracting spatial feature points in target areas in the pictures by utilizing a scale-invariant feature extraction method and matching the feature points; resolving a fundamental matrix between the two pictures by utilizing an epipolar geometry constraint method to obtain an essential matrix, and further resolving a rotation transformation matrix and a displacement transformation matrix of the video camera; then performing three-dimensional reconstruction and scale correction on the feature points; and finally constructing a target coordinate system by utilizing the feature points after reconstruction so as to obtain the position and the attitude of a target relative to the video camera. According to the method provided by the invention, the monocular vision is adopted, the calculation process is simplified, the calibration with the hands and the eyes is used, and the elimination of error solutions in the measurement process of the position and the attitude of the video camera can be simplified. The method is suitable for measuring the relative positions and attitudes of stationery targets and low-dynamic targets.

A cylindrical capillary pump assembly of a loop heat pipe comprises an evaporator shell (3), a liquid accumulator shell (4) and a capillary core (2). The liquid accumulator shell (3) is connected with the evaporator shell (4). One section of the capillary core (2) is located inside the evaporator shell (3). The other section of the capillary core (2) stretches into the liquid accumulator shell (4). The capillary core (2) is formed by sintering porous silicon nitride, and good porosity, good chemical stability, a low heat conductivity coefficient and a good machining property are achieved. A local part of the junction of the liquid accumulator shell (3) and the evaporator shell (4) is designed to be of an S-shaped structure; and the heat conduction path is long, the heat conductivity coefficient is relatively low, and the probability of leakage of heat from an evaporator to a liquid accumulator can be lowered. According to the cylindrical capillary pump assembly of the loop heat pipe, it can be guaranteed that the loop heat pipe has good starting performance, a good heat transfer property and a long service life, and can well adapt to a spatial microgravity environment and a mechanical environment on a spacecraft launching section at the same time.

This invention relates to self-discipline assisted navigation location method of the GPS receiving apparatus which can realize the location continuity of the GPS satellite signal blind area and enlarge the GPS utility range and the GPS performance to cost ratio. The method is the following: to base on the data before signal interval and to calculate the operation speed and operation direction and to output the two-dimension location information; the GPS antenna receives the signals which are amplified, filtered, expand demodulated, CPU demode calculation; the CPU after demode judges the signal satellite amount and judges whether the signal intensity meets the location requirements. If the GPS cannot locate, then it will be automatically switched into the self-discipline navigation status and get the mobile direction through the angle sensor integral operation and get the distance through the calculation of the impulse signals of the speed sensor.

The invention provides a no-shield tracking method of a biaxial solar photovoltaic power generation system. The no-shield tracking method comprises the steps of: judging a shielding situation between shades of solar panels and other solar panels based a solar azimuth when the solar panels are vertical to the sunlight; dynamically adjusting an angle of inclination of each solar panel based on the shielding situation to enable the shade of each solar panel not to shield neighboring solar panels. As the angle of inclination of each solar panel is added gradually from zero degree, so that the shielding phenomenon can be avoided at any moment when the solar panels track the sun, all the solar panels can generate power uniformly, and a power generation device is well protected; furthermore, the distance among the solar panels is unnecessary to add, so that the daily total generating capacity and the power generation efficiency of the solar panel array in the same condition are improved.

The invention discloses a heat pump unit. The heat pump unit comprises an indoor unit and an outdoor unit. The indoor unit comprises an indoor unit shell and indoor air conditioner system parts located in the indoor unit shell. The outdoor unit comprises an outdoor unit shell and an outdoor air conditioner system part located in the outdoor unit shell. The indoor air conditioner system parts and the outdoor air conditioner system part are connected through a refrigerant pipeline to form a refrigerant loop of the heat pump unit. The indoor air conditioner system parts include a compressor and a water side heat exchanger used for condensing refrigerants when the heat pump unit is used for conducting heating. The outdoor air conditioner system part includes an air cooling heat exchanger used for evaporating the refrigerants when the heat pump unit is used for conducting heating. The heat pump unit can solve the problem that the water side heat exchanger and water way valve pieces are prone to freezing when the heat pump unit is at a low temperature.

The invention discloses a sample preparation method for the fracture of a tungsten carbide coating on a magnesium-alloy surface via a scanning electron microscope. The sample preparation method comprises the following specific steps of: cutting a magnesium-alloy test sample into small-size cuboids by cutting equipment; cutting a magnesium-alloy matrix by high-accuracy cutting equipment to obtain a magnesium-alloy sheet test sample; cutting a notch at the opposite positions of the two long sides of the magnesium-alloy sheet test sample by the cutting equipment respectively; ultrasonically cleaning by absolute ethyl alcohol; soaking the magnesium-alloy sheet test sample in liquid nitrogen until a heat balance is achieved; breaking the magnesium-alloy sheet test sample; and taking out the magnesium-alloy sheet test sample from liquid nitrogen, placing the magnesium-alloy sheet test sample on filter paper, immediately blow-drying by a blower, and then obtaining the clean and regular fracture test sample of the magnesium-alloy sheet test sample. The sample preparation method disclosed by the invention has the following advantages that: 1, the sample preparation method is simple and convenient; 2, the obtained test sample is clean and pollution-free; and 3, the obtained test sample is regular and beneficial to the morphology analysis and test of the scanning electron microscope.

The invention relates to an intelligent powder spraying device for machining an automobile hub. The intelligent powder spraying device comprises a powder box, a controller, a fixing mechanism, a firstnozzle, a bottom surface spraying mechanism, a branch pipe and a top surface spraying mechanism. The bottom surface spraying mechanism comprises a first motor, a driving gear, a driven gear, a vertical pipe, a transverse pipe, a second nozzle and a supporting assembly. The fixing mechanism comprises a plurality of fixing assemblies. Each fixing assembly comprises a fixing rod, a fixing plate, a driving unit, a movable ring and a plurality of fixing units. The top surface spraying mechanism comprises a top plate, a lifting assembly, a third nozzle and a hose. According to the intelligent powder spraying device for machining the automobile hub, fixing of the hub is achieved through the fixing mechanism, and the hub is conveniently driven to rotate and be sprayed, not only that, the hub is driven to rotate by utilizing the bottom surface spraying mechanism so that powder sprayed out by the first nozzle, the second nozzle and the third nozzle can evenly adhere to the two surfaces of the hub, and the hub powder spraying quality is improved accordingly.

Capacitance touch screen and method for preparing the same, the touch screen includes a substrate, two sets of wire transparent conductive films, an insulation film, and a low-resistance transparent conductive film, in two sets of wires, a first set of transparent conductive films are disposed continously, a second set of transparent conductive films are disposed sectionally by using the first set of transparent conductive films as intervals; the low-resistance transparent conductive film is attached onto the substrate sectionally corresponding to the second set of transparent conductive fims, the insulation film is covered on middle part of the low-resistance conductive film and adjacent substrate, the first set of transparent conductive films cross the low-resistance transparent conductive film and being attached onto the insulation film and substrate, the second set of transparent conductive films are covered on end of the low-resistance and the substrate to form a continous second set of wires. The method is used to produce low-resistance transparent conductive film, the first and second set of transparent conductive films on the substrate for implementing the touch screen structure. The invention avoids chromatic aberration of touch screen, reduces resistance of the second set of wires, improves visual effect of the touch screen, excludes electrical interference, and improves quality and performance of products.

The invention relates to a toolbar display control method and device, a readable storage medium and a computer device. The method comprises the steps of acquiring first area information of a currentlyapplied toolbar area in a current display interface, and acquiring second area information of a floating toolbar area in the current display interface; according to the first area information and thesecond area information, determining whether or not the toolbar area and the floating toolbar area have an intersection; if yes, hiding a floating toolbar, and displaying a trigger button in the current display interface; when a trigger event for the trigger button is detected, displaying the floating toolbar in the current display interface. According to the embodiment, whether or not the toolbar of an application used by a user is blocked can be timely detected, and the floating toolbar is hidden in time to improve the user experience.

The invention discloses a motherboard of a holographic concave blazed grating and a manufacturing method of the motherboard. The manufacturing method comprises the steps that (1) a holographic concave grating mask is manufactured; (2) a metal layer is deposited on the holographic concave grating mask; (3) the meal layer is coated with an adhesion agent; (4) the metal layer connected with a male die is separated from the holographic concave grating mask and cleaned, and a convex metal grating mask is obtained; (5) a grating tooth structure of the convex metal grating mask is measured, and grating tooth duty ratio information is obtained, and the duty ratio of grating teeth is adjusted through an electroforming or film coating method and a chemical etching or ion etching method; (6) the convex metal grating mask is etched through ion beams to be converted into a triangular blazed structure, and the motherboard of the holographic concave blazed grating is obtained. According to the motherboard of the holographic concave blazed grating and the manufacturing method of the motherboard, the concave grating mask structure is transferred to the convex metal layer, the metal layer is good in flexibility, the transfer precision of the grating groove type structure is high, cracking and deformation are not prone to occurrence, and durability is good.

The invention discloses a preparation method for a PERC double printing polycrystalline solar cell. The PERC double printing polycrystalline solar cell is obtained by taking a polycrystalline siliconwafer as a base material and sequentially performing the steps, namely flocking, diffusion, etching, annealing, back passivation, antireflection film plating, back laser grooving, printing, sinteringand light attenuation reduction; in the annealing step, oxygen-free annealing is adopted, in the back passivation step, Al2O3 and SiNX are plated on the back of the silicon wafer, in the antireflection film plating step, SiNX is plated on the front of the silicon wafer, during positive electrode printing, a silk screen printing machine is adopted for printing twice, namely DP1 and DP2, a secondarygrid line is printed during the DP1, a main grid line and the secondary grid line are overprinted during the DP2, and a silk screen printing plate used in the printing DP1 and the printing DP2 is a knotless silk screen printing plate. The preparation method provided by the invention and for the PERC double printing polycrystalline solar cell can reduce LID of the solar cell to be about 1%, powerof a module finished product can be increased, conversion efficiency is high, and grade and electrical properties are obviously improved.

The invention relates to a waste water purifying equipment. The invention provides a biological stuffing shaking bed in which biological stuffing composed of fibers attached with microorganisms easily are arranged. The shaking bed of the invention overcomes the technique defects of general wastewater treatment devices, and can realize the stable treatment effect and remove the organic matters, nitrogen, phosphorus and chroma in water, and the range of application is wide.

The invention provides a scanning electron microscopy sample production method of a coated white cardboard fracture. The method comprises the following steps: shearing a coated white cardboard to form a long strip, wherein one end of the long strip along the length direction is sharp-pointed, and the width of the tip is less than or equal to 0.5 mm; and slicing the tip of the long strip through adopting a mechanically propelled ultrathin slicing machine by using a diamond cutter at a slicing rate of below 0.5 mm/sec in order to obtain the coated white cardboard fracture. The coated white cardboard fracture produced by using the method is clean and flat without pollutant shielding, so the clear coated white cardboard fracture microscopic picture of the sample fracture is obtained, and analysis test of the thickness of a white cardboard coating and the particle size and the shape of particles is realized by using a scanning electron microscope.

The invention discloses a preparation method of a PERC micro graphic printed monocrystalline solar cell. According to the preparation method, a monocrystalline silicon wafer is used as a base material, and the cell is prepared through steps of texturing, dispersing, etching, annealing, back passivating, antireflecting film plating, laser grooving on back, printing, sintering and reducing light attenuation, wherein the annealing step adopts anaerobic annealing, the back passivating step is to plate Al2O3 and SiNX on the back of the silicon wafer, the antireflecting film plating step is to plateSiNX on the front of the silicon wafer, the positive electrode printing step adopts a silk screen for printing, and the positive electrode printing screen adopts a non-knot micro graphic printing screen . Through adoption of the preparation method of the PERC micro graphic printed monocrystalline solar cell, cell LID can be lowered to around 1%, the power of the component finished product is improved, the conversion efficiency is high, and the grade and electric performance of the cell are improved remarkably.

The invention discloses a preparation method of a conventional single-crystal secondary-printed solar battery piece. The preparation method comprises the following steps of A, texturing; B, diffusion;C, etching; D, annealing; E, plating of an antireflection film; and F, printing, wherein annealing in the step D adopts oxygen-free annealing; and a non-net-knot secondary printing mode is adopted for printing in the step F.

The invention provides an airplane ground air conditioning unit, relates to the technical field of air conditioners, and solves the technical problems that an air conditioning unit is large in size and occupies ground space. The airplane ground air conditioning unit comprises a condensation unit arranged on the ground and an evaporation unit arranged under the ground, the evaporation unit communicates with an airplane inner cabin to continuously provide needed fresh air, and the condensation unit is connected with the evaporation unit through a refrigerant pipeline. The whole unit is divided into an upper-layer structure and a lower-layer structure, the evaporation unit and the condensation unit are separated, the upper-layer condensation unit is placed on the ground and used for condensation and heat dissipation, the lower-layer condensation unit is embedded into the underground space and used for supplying air to an inner cavity of an airplane after cooling, the length size of an evaporator is only limited in terms of the width direction, the size of the unit in the width direction is reduced, and the occupied area is greatly reduced; and the evaporation unit on the lower layer is embedded into the underground space, the increased height space can be counteracted, and the ground height space cannot be occupied.

The invention relates to a large-aperture lens antenna in the field of antennas. The large-aperture lens antenna comprises a spherical lens, a spherical phase difference correction lens and a feed source group. The spherical lens is hollow, and a feed source is located at the center of the spherical surface of the reverse side. The axial direction of the feed source is consistent with the radial direction of the spherical lens. The phase center in the feed source is located at the sphere center of the spherical lens, and the feed source is supported at the sphere center of the spherical lens through the supporting column, or the intersection points of electromagnetic waves entering into the spherical lens in any direction and transmission lines formed by transmission form a reverse spherical surface concentric with the spherical lens, and the phase center in the feed source is located on the reverse spherical surface. The antenna can achieve the large-gain wide-angle scanning, and theperformance is almost unchanged along with the scanning angle.

The invention discloses an intelligent control system favorable for improving heat dissipation efficiency of an excavator. The intelligent control system comprises an engine, an engine fan, an engine cooling water radiator, a hydraulic oil radiator, a power source, a fuse A, an air-conditioner switch, a temperature controller, a high-low voltage switch, a compressor clutch, an air-conditioning condenser, a temperature sensor, a fan motor, a fan, a fuse B and a controller connected to a joint of the high-low voltage switch and the compressor clutch. The air-conditioning condenser is moved away from the front of the engine cooling water radiator and the hydraulic oil radiator, is placed at a position with an independent space and is aligned with the fan connected with the fan motor, not only can heat of the air-conditioning condenser be dissipated independently, but also heat dissipation efficiency of the engine cooling water radiator and the hydraulic oil radiator can be improved, flexible adjustment can be performed according to the heat dissipation requirements of the air-conditioning condenser simultaneously, and the engine cooling water radiator and the hydraulic oil radiator can be cleaned conveniently.

The invention discloses a retractable light emitting diode (LED) lighting screen which comprises LED lighting modules, twine units, a connection piece, a scroll chamber, an upper rail and a lower rail, wherein the LED lighting modules are inserted in the twine units, the upper ends of the twine units and the lower ends of the twine units are respectively connected with the upper rail and the lower rail through connection rods in a hinging or welding or riveting mode, slip bands are arranged on the upper rail and the lower rail and are connected with a rotary shaft of a rotary shaft chamber, and the slip bands drive the twine units to roll to the left side after the rotary shaft of the rotary shaft chamber is rotated, and finally the slip bands and the twine units are contained in the rotary shaft chamber. When the LED lighting screen needs to be used, the twine units are pulled out and unfolded one by one from the scroll chamber. The retractable LED lighting screen has the advantages that the LED lighting screen can be retracted in a mode of horizontal rolling, and the retracted LED lighting screen composed of the plurality of twine units hardly covers a window of a building.