104 results about "Double Circle" patented technology

The invention relates to an automatic detection method of particle size distribution, which is characterized by comprising the following steps: step one, preprocessing images, converting images to be detected into HSV space from RGB space, acquiring chroma, brightness and saturation components of the images to be detected, carrying out Gaussian smoothing filter and histogram equalization to all components and automatically enhancing the brightness, the color and the contrast of the images; step two, carrying out morphological smoothing of color images so as to avoid images caused by the effect of shadow and reflected light; step three, judging a particle area and a centroid thereof and eliminating pseudo-boundary points positioned on the surfaces of particles after completing the process of boundary extraction operation, wherein the pseudo-boundary points have the characteristics of boundary points but are not boundary points ; step four, expanding particles maximumly and carrying out maximum expansion operation of the particle area, i.e. dividing the whole material surface into a plurality of parts according to the principle of proximity to one of the particles; step five, calculating particle size by a double-circle method; and step six, calculating particle size distribution. Accordingly, the invention provides direct information reference of particle size distribution for follow-up decision operation of industrial process control.

The invention relates to the technical field of lighting equipment, in particular to a double-circle rotary focusing ceiling lamp capable of being limited by a check ring. The ceiling lamp comprises a shell, a light source, a radiator, a front cover and a convex lens, wherein the light source is fixed to the radiator and located in the shell, the shell is fixed to the radiator, the convex lens is fixed to the front cover, the front cover is connected with the shell, and the front cover and the shell constitute a double-circle rotary focusing mechanism. By means of the structure, the front cover is designed into the double-circle rotary focusing mechanism, and accuracy is high; in zooming, shaking of the convex lens installed on the front cover is reduced, the convex lens smoothly moves, light spot deviation is avoided, and the ceiling lamp is simple in structure, convenient to use and practical.

The invention relates to the field of hold hoops used for telegraph poser engineering construction, in particular to an adjustable type telegraph pole hold hoop which is suitable for telegraph poles with different diameters. The adjustable type electric pole hold hoop comprises a split type outer circle clamping piece and is characterized in that three to eight inner circle clamping pieces are evenly arranged in the outer circle clamping piece, each inner circle clamping piece is connected with the outer circle clamping piece through a first bolt, and the size and the diameter of the inner circle are determined by the inner circle clamping pieces and are adjustable. The outer circle clamping piece comprises a first clamping piece body and a second clamping piece body, one end of the first clamping piece body is connected with one end of the second clamping piece body in a hinged mode, and the other end of the first clamping piece body and the other end of the second clamping piece body are respectively provided with a lip edge and connected through a second bolt. The thickness of the wall of the outer circle clamping piece is 5mm to 6mm. Compared with the prior art, the adjustable type telegraph pole hold hoop has the advantages that each inner circle clamping piece can be independently adjusted through each bolt to enable the adjustable type telegraph pole hold hoop to be suitable for the telegraph poles with different diameters, shifting of the center of the hold hoop can be achieved through adjustment of the bolts to achieve an optimum effect, installation can be conveniently conducted, and reliability of the connecting performance is guaranteed.

The invention discloses a broadband high-gain double-circle polarized patch antenna. The broadband high-gain double-circle polarized patch antenna comprises a floor layer, a feed network, square patch arrays, an upper dielectric substrate, a middle dielectric substrate and a lower dielectric substrate, wherein the upper dielectric substrate, the middle dielectric substrate and the lower dielectric substrate are sequentially arranged from top to bottom and are supported separably through dielectric frames. The square patch arrays are adhered to the lower surfaces of the upper dielectric substrate and the middle dielectric substrate. Each square patch array comprises four square units in two-row two-column arrangement. The floor layer is positioned on the upper surface of the lower dielectric substrate. The feed network is etched on the lower surface of the lower dielectric substrate. Eight radiant gaps are etched on the floor layer. The feed network comprises a directional coupler, six power dividers and an air bridge. The feed network divides an input signal into eight channels of signals, feeds the signals into the radiant gaps and feeds electricity upwardly to the square patch arrays through the radiant gaps, and finally, an antenna radiation effect is achieved through middle and upper radiation. The broadband high-gain double-circle polarized antenna is achieved by the aid of a printed circuit process.

The invention provides an additive manufacturing method for an electric arc filler wire and a device. The device comprises a control module, a manufacturing module and a power module which are connected mutually. The control module is used for controlling the manufacturing module to be operated to manufacture a product, and controlling the power module to supply the power. The power module is used for, under the control of the control module, outputting compound superaudio frequency pulse current to the manufacturing module so as to provide a heat source to the manufacturing module. The added compound superaudio frequency pulse has the remarkable modulating action to GTAW electric arc, the electric arc shrinkage is remarkable, the electric arc force is greatly improved, the fusion penetration rate of the settled layer is improved, the side surface roughness of the settled layer is reduced, and the forced vibration of the liquid metal in a weld pool can be caused by the electric arc ultrasound effect, so the liquid metal flow is a double-circle flow mode, the air hole defect is reduced, the gain structure is refined, and the component performance is improved.

The invention provides an automatic measuring system for rock saturation and infiltration, its character lies in: the measuring system includes water supplying device connected by pipes, double-circle infiltration device, flow measuring device, the outlet of the double-ring infiltration device is connected to the inlet of the tip flow measuring device, water from the flow measuring device enters the water supplying device through a pump, the rate of ground water saturation and infiltration into the rock according to the water quantity difference entering and flowing out the double-circle in unit time. Compared with current measuring method, it changes the traditional thinking which changes the water level in concentric ring or in martensite bottle, according to dynamic water balance theory, the infiltration rate can be acquired through measuring the outlet flow of the concentric ring, thus the automatic monitoring of water data is possible, and the measuring accuracy is upgraded greatly. The measuring system in the invention is simple, and the management is convenient.

The invention discloses a positioning method of a circle center projecting point of coplanar circles, which constructs a quadratic curve according to an ellipse of the coplanar double circles on a camera image plane to obtain the characteristic value and the characteristic vector of the quadratic curve so as to obtain the perspective projection invariant point of the coplanar double circles and the structural parameters of the double circles, and utilizes the principle that anharmonic ratio is unchanged to determine the real projecting point of the circle center of the double circles on the image plane. The positioning method can determine the real projecting point of the circle center of the double circles without knowing any structural parameters of the coplanar double circles and can obtain the structural parameters of the double circles, and the method is simple and feasible and has better practicability and reliability.

The invention relates to a double-circle polarization and difference beam broadband corrugation horn feed antenna comprising an antenna body and a coaxial probe, wherein the antenna body is in a cylindrical shape, the upper part of the antenna body is provided with a corrugation part, the lower part of the antenna body is provided with a feed part, more than two ring grooves are evenly distributed in the radial direction of the corrugation part, the groove depth of the ring grooves is 1/4 wavelength of center frequency, a groove width and a groove space are smaller than 1/10 wavelength of the center frequency, more than six coaxial probes are evenly arranged on the radial direction of the feed part, the extended distance of the coaxial probes in the antenna body is 1/4 wavelength of the center frequency, and the distances from the axial center of the coaxial probes to the bottom of the ripple part and from the axial center of the coaxial probes to the bottom of the feed part are 1/4 wavelength of the center frequency. The double-circle polarization and difference beam broadband corrugation horn feed antenna adopts the coaxial probes to excite a circular waveguide side wall and realizes favorable circular polarization and difference beams, and the feed method can be used for a higher frequency band. The double-circle polarization and difference beam broadband corrugation horn feed antenna can be used for a high frequency-band broadband double-polarization single pulse feed resource and can achieve a favorable circular polarization axial ratio in a frequency band range of 60 percent.

The invention discloses a vertical shaft working face cement-water glass double-liquid and chemical slurry double-circle curtain combined grouting method. The method includes: arranging inner and outer circles of drill holes along a shaft working face, wherein the drill holes are different in angle; injecting cement-water glass double-liquid slurry into inner-circle grouting holes; injecting chemical slurry into outer-circle grouting holes; utilizing grouting in the drill holes to form a conical curtain blockage water-containing layer fracture outside the wall of a well. The method can block more water-containing fractures, is small in grouting amount and good in grouting effect and is a vertical shaft working face grouting technique which is safe, reliable and good in grouting effect.

The invention provides a full automatic lathe for an inner circle and an outer circle of a commutator. The full automatic lathe can automatically complete the transportation of the commutator, the machining of the inner circle and the outer circle and the detection of the inner circle and the outer circle by mechanical equipment, improve the accuracy in operation of the equipment, reduce the machining errors of the commutator caused by manual operation and ensure the quality of a product; and furthermore, by adopting the mechanical equipment to perform full automatic machining on the commutator, the surface of the commutator can be prevented from being damaged by turnover in all process steps when the commutator is machined, the machining operation of the inner diameter and the outer diameter of the commutator can be completed on one equipment, machining time is saved, working efficiency is improved, and the full automatic lathe is conductive to improving production benefits.

The invention relates to a center-wiring double-circle-arrangement single-IC (integrated circuit) chip packaging piece and a preparation method of the packaging piece. An IC chip is adhered on a lead frame carrier, a center-wiring ring is arranged on the outer side of the IC chip, two circles of inner pins are arranged outside the center-wiring ring, an inner circle of pad and an outer circle of pad are arranged on the center-wiring ring, the inner circle of pad conducts routing with the pad of the IC chip, and the outer circle of pad conducts routing with the first inner pin and the second inner pin respectively. According to the invention, the center-wiring ring and salient points arranged in double circles are smartly combined, and the center-wiring ring is connected with or embedded in the lead frame carrier by high-strength glue, thereby enhancing the combination of plastic packaging material and the frame, reducing the thickness of the frame, preventing layering, and being favorable for improving the reliability of products. The two circles of pads on the center-wiring ring are connected with each other by a PCB (printed circuit board) design line and are connected with the inner pins by switching of the internal line of the center-wiring ring as the IC chip, thereby reducing the length of a bonding wire, and saving the cost of the bonding wire, especially the use cost of gold wires.

The present invention provides a double-circle sub-template underwater terrain matching method. The method comprises: acquiring a strip by a multi-beam sounding system, forming a two-dimensional elevation array by means of data processing, transforming the two-dimensional elevation array into a gray-scale value, forming a to-be-matched template, calling an original database terrain elevation map, transforming the original database terrain elevation map into a gray-scale map, and forming a search mother map; selecting a relatively large template, selecting two small sub-templates as inscribed circles, determining a positional relationship between the double circles, and performing double-circle sub-map search matching on the mother map; and extracting an image corner point feature amount, matching double-circle sub-maps searched by the mother map with the sub-templates, and acquiring the position of an underwater vehicle. Compared with a conventional single template matching method, the double-circle sub-template underwater terrain matching method provided by the present invention solves the problem of excessively long traversal search matching time; and by using a circular template, the calculation complexity of a corner point feature detection algorithm can be lowered, the influence of problems such as rotation, affine transformation and the like is overcome, the matching time is shortened, the matching precision is improved, and very good generalization and applicability are achieved.

The invention relates to a mixing and stirring conveyor for bunker coal and a coal saving additive, including a housing provided with a supporting seat and a discharge opening arranged on the housing; the housing is a transversely arranged slot body; the cross section of the slot body is in a 'W' shape and the bottom part is a double-circle arc; a main shaft and a vice shaft which are mutually parallel are arranged in the slot body along the length direction of the slot body; the ends of the two shafts are connected with a gear; the two gears are engaged; a plurality of vanes are arranged on the main shaft and the vice shaft according to a spiral line; the twisting direction of the two spiral lines are opposite; the vanes on the main shaft and the outer edges of the vanes on the vice shaft have a coincidence part H along the coaxial direction; the main shaft is connected with a reducer which is arranged at one end of the slot body and connected with a motor; the discharge opening is arranged at the bottom part of the slot body and is close to the end location of the slot body. The conveyor can carry out stirring and conveying simultaneously and has a high stirring capacity. The coal mixed with the coal saving additive can be continuously conveyed without changing the original coal conveying flows of a large coal-using unit, thus not only improving coal saving performance, but also ensuring the normal production of the coal-using unit.

The invention discloses a slit rolling technique of round steel, which comprises the following steps: a blank is rolled into parallel rolled pieces after undergoing the stages of rough rolling, medium rolling and precision rolling; the rolled pieces are slit by a slitting wheel for obtaining the round steel rolled pieces, wherein the roll passes with specific structures and sizes including the rhomboid pass, the cinquefoil square pass, the dumbbell-shaped pre-slit pass, the double-circle slitting pass, the ellipse pass and the round pass are sequentially adopted in the medium rolling and the precision rolling stages, the square rolled pieces rolled by the cinquefoil square pass require further slitting and positioning by a slitting wedge, and the point angle Theta of the slitting wedge is 60 DEG- 65 DEG; finally each thin and narrow connecting band of the rolled pieces is slit by the slitting wheel on a slitting foreplate, wherein the point angle of the slitting wheel is 90 DEG- 95 DEG. The round steel produced by adopting the slit rolling technique of the invention has good surface quality and high production rate, and the slit rolling process can effectively improve the machine-hour yield of the round steel and increase the production efficiency in a factory.

The invention discloses a high-robustness real-time visual line detection method, and the method can be used for carrying out the real-time tracking and dynamic detection of a visual line of human eyes through a camera. The method comprises the steps: detecting the accurate position of an iris center through a double-circle moving model obtained through the initialization of the priori knowledge of a human eye structure; employing a stable human face feature point detection method for detection and recalculation, obtaining the precise position of a reference point, and combining the precise position of the reference point with the position of the iris center to obtain an eye vector; carrying out the second-order mapping of the eye vector and the posture of a head, and obtaining the coordinates of a position pointed by the visual line; and finally carrying out the weighted summation of the position coordinates obtained through the calculation of the left and right eyes via weight coefficients, thereby improving the detection accuracy. The method achieves the precise detection of the position of the iris center and the position of the reference point, is not large in calculation burden, can achieve the real-time detection of the visual line, enables a system to be low in cost and to be high in accuracy, and is very high in practical value.

The invention discloses a method for accurately positioning the iris center of a low-resolution image. The method comprises the following steps of acquiring face feature points, and extracting an eyearea image according to the obtained face feature points; performing binarization treatment on the eye area image and recognizing the eye state, namely eye opening and eye closing recognition; roughlypositioning the iris center of the eye area image through a double-circle activity boundary model; extracting the edge of the iris and accurately positioning the iris center of an eye-opening image by adopting the least binary circle fitting algorithm; and accurately positioning the iris center of an image with less than two edges and the iris center of an eye-closing image by adopting the iris center quality evaluation and binarization communication domain method. The invention also discloses an extraction device for accurately positioning the iris center of the low-resolution image. According to the method, the parameters of the double-circle activity boundary model are initialized by utilizing eye anatomical parameters, and an accurate and practical algorithm for extracting the iris edge is designed. Therefore, the calculation efficiency and the accuracy of iris center positioning are improved.

The invention provides a ground verification method of the performance of a double-circle polarized multiplexed satellite-borne data transmission antenna. A testing system used by the ground verification method comprises a satellite system and a ground system. The ground verification method comprises the following steps: first, the decrement of an attenuator is calculated according to the distance between a satellite system and a ground system and the actual working condition of a satellite in an orbit; mutual directing and aiming are conducted on the satellite-borne double-circle polarized multiplexed data transmission antenna and a ground receiving antenna; a ground verification simulation test is conducted, the satellite and ground combination polarization detectability of a channel one and a channel two and the link margin of the channel one and the channel two are measured, the directing angle of the satellite-borne double-circle polarized multiplexed data transmission antenna and the directing angle of the ground receiving antenna are pulled to be slanting, the satellite and ground combination polarization detectability and the link margin are measured when the directing angles are pulled to be slanting, and further an antenna directing accuracy which meets the demands of a link can be measured. According to the ground verification method of the performance of the double-circle polarized multiplexed satellite-borne data transmission antenna, comprehensive ground verification to the double-circle polarized multiplexed satellite-borne data transmission antenna can be achieved, a basis is provided for in-orbit operation, and risks of the in-orbit operation are reduced.

The invention discloses an ultrasound-assisted vaporization cooling double-circle grinding system with an improved fog gun. The ultrasound-assisted vaporization cooling double-circle grinding system comprises a grinding wheel and a roller, wherein the roller is externally tangent to the grinding wheel. A case is arranged at one side of a grinding wheel support. A double-rod support is vertically arranged at the top of the case. A fog gun barrel is mounted at the top end of the double-rod support through a rotating shaft. A jet flow annular pipe net and an atomization annular pipe net are fixedto the front end of the fog gun barrel. The bottom end of the jet flow annular pipe net is connected to a metering pump through a liquid supply pipe. The bottom end of the atomization annular pipe net is connected to the case through a fog supply pipe. An electric control cabinet is arranged at one side of the case. The flow speeds of the jet flow annular pipe net and the atomization annular pipenet and the rotating speeds of a hub and a fan blade assembly are adjusted, the ratios of jet flow liquid drops to atomization liquid drops and air are changed, and meanwhile, the rate that jetting is conducted toward a grinding area in an integrally-columnar form is changed; axial ultrasonic vibration and longitudinal ultrasonic vibration are added to assist in the grinding process, and the Leidenfrost effect is reduced; and the grinding cooling effect is enhanced, and the grinding surface quality is improved.

The invention relates to a centrifugal fan, comprising: disk fan plates and a plurality of blades vertically installed around fan plate with a constant space. Supposing the diameter of incircle connecting blade inside part is Di, and diameter of circumcircle connecting blade outside part is Do, the ratio between inner diameter and external diameter (Di/Do) is 0.76+- 0.3; the arch scheme of blade is double circle arc, the outlet angle of blade is 165degree+-10degree, and the number of blade is 41-49. The centrifugal fan carries out air blowing function and reduces noise, which improves comfortable degree for users.

The invention belongs to the technical field of wireless communications and discloses a multifunctional circularly-polarized converter array based on a multi-layer FSS (frequency selective surface) structure and a wireless communication system; a four-layer cross oscillator equipped with a double-circle annular filtering structure is used as an array unit, different reflection-transmission characteristics are achieved in different frequency bands; then, the sizes of the cross oscillators in the X direction and the Y direction of an FSS unit are reasonably adjusted and the cross oscillators areperiodically arranged, and finally, a linearly-polarized feed source antenna is placed right above a circularly-polarized converter array and forms an included angle of 45 degrees with the X axis, the designed circularly-polarized converter array can achieve forward circularly-polarized radiation waves in high frequency bands respectively, and the functions of the reflection-type FSS circularly-polarized converter and the transmission-type FSS circularly-polarized converter array are effectively integrated on the same circularly-polarized converter. According to the FSS circularly-polarized converter in the invention, functional diversification and the intelligent degree are obviously improved, and the development and application of the FSS circularly-polarized converter technology are powerfully promoted.

The invention discloses an integrated sealing axle box bearing for a locomotive axle box. Two symmetrical rollerway nests are arranged on the outer circle of the bearing and can bear radial and bidirectional axial loads. The outer circle rollerway nests and an inner circle rollerway nest of the bearing have certain convexity. The generatrix of a roller body adopts a novel logarithmic curve repair type; and compared with a traditional logarithmic curve repair type, the middle part of the roller body is small in repair type amount, and the convexity at the two ends of the roller body changes greatly. The inner diameter surfaces of the two ends of the outer circle are each provided with an annular threaded opening so that the outer circle can be conveniently in interference fit with a sealing assembly. The inner circle of the bearing is of an inclined rim structure, and the lubricating and stress conditions of the roller body and the inclined rim are improved. A middle spacer is arranged between two inner circle assemblies and used for adjusting the axial play of the bearing, and the combination rate of the bearing is improved. The axle box bearing provided by the invention has the characteristics that the sealing effect is good, the bearing is high in carrying capacity, and the axial play is convenient to adjust, the bearing failure risks are lowered, and the service life of the bearing is prolonged.