75results about How to "Avoid crossover" patented technology

The invention discloses a ring-shaped winding machine which comprises an open-type machine head, an electric cabinet, a transmission mechanism, a wire storage mechanism, a winding mechanism and a wire arranging mechanism, wherein the wire arranging mechanism comprises a mounting seat, a driving rubber wheel provided with a tray and a driven rubber wheel, and the driving rubber wheel provided with the tray is connected with a second transmission mechanism in a transmission way; the wire storage mechanism is provided with a wire storage ring, the winding mechanism is provided with a gear provided with an opening, and the gear provided with the opening is connected with a first transmission mechanism in a transmission way and connected with the wire storage ring when rotating clockwise. The ring-shaped winding machine is characterized in that the second transmission mechanism is driven by a stepper motor, the electric cabinet is internally provided with a singlechip control system, a wire distance amending button is arranged on the electric cabinet, the stepper motor is controlled by a singlechip, and the wire distance amending button is electrically connected with the singlechip. The ring-shaped winding machine can increase or reduce the number of wire distance pulse by the control of the wire distance amending button and the singlechip, so that enamelled wires can be accurately wound into a wire groove all the time, and the phenomenon of wire jumping or overlapping can be stopped.

The invention discloses a method for recognizing reservoir fluid properties based on grey correlation analysis. The method includes the following steps of 1, collecting the six parameter values of gasometry, themolysis, quantitative fluorescence, porosity, permeability and interval transit time of a stratum to be analyzed and stratums with oil test conclusions, wherein the stratum to be analyzed and the stratums with oil test conclusions belong to the same oil and gas reservoir; 2, conducting dimensionless processing on the six parameters; 3, calculating the correlation degree; 4, calculating the weight coefficient of each parameter; 5, conducting weighted summation on three parameters of gasometry, themolysis and quantitative fluorescence of each stratum to obtain the oil and gas abundance index of the stratum, and conducting calculation on the other three parameters to obtain the physical property index; 6, drawing an interpretation chart with the two indexes, and marking areas; 7, calculating the oil and gas abundance index and the physical property index of the stratum to be analyzed, and drawing dots in the interpretation chart, wherein the areas corresponding to the dots represent reservoir fluid properties. According to the method, the reservoir fluid properties are comprehensively evaluated with multiple parameters, so that the limitation and multiplicity of solutions of a single-parameter evaluation method are avoided, and the logging oil-gas-water layer interpretation coincidence rate is increased.

The invention provides a belt type loading device applied to a numerical-control circular sawing machine. The belt type loading device comprises a loading frame basal body, a belt wheel assembly, a chain conveying assembly, an inclined supporting plate, an air cylinder pushing assembly, a baffle regulating assembly, a clamping oil cylinder assembly, a turnover oil cylinder assembly and a rod diameter regulating assembly. A whole bundle of rods is lifted onto a belt of the belt wheel assembly, and the belt is tightened, so that the rods drop onto a chain of the chain conveying assembly; the chain conveying assembly drives the rods to move to the inclined supporting plate; the height position of a baffle block of the baffle regulating assembly is regulated according to the diameters of the rods, and the rods are controlled to pass through one by one, then, the rods are turned over to a U-shaped plate of the loading frame basal frame through a turnover oil cylinder of the turnover oil cylinder assembly, the air cylinder pushing assembly pushes materials forwards, the clamping oil cylinder assembly clamps rods, the workbench of a machine head part of a main machine retreats to the origin point to clamp the rods, the clamping oil cylinder assembly of the loading mechanism is loosened, and the workbench clamps the rods to forwards feed to complete cutting. The whole process is automatically controlled, and manual control is not needed.

The invention provides a hyperspectral remote sensing image end member extraction method on the basis of a revised extended morphological operator, which is characterized in that an original image is filtered by the opening-and-closing operation and the closing-and-opening operation which are defined by the revised extended morphological operator so as to fulfill the aim of combining spectral information with space information to carry out end member extraction. The method mainly aims to solve the problem of limitation in the extended morphological operator; the revise is carried out by leading in a reference vector; for the provided revised extended morphological operator, the alternately replacing phenomenon is eliminated; the correct replacing direction is ensured; and a separating effect of pure pixels and mixed pixels is reinforced. An experimental result shows that the condition that the method provided by the invention can optimize the end element extraction effect is proved onthe aspects of the spectral curve similarity and a corresponding ground feature distribution map and the like; and the method has a moderate calculated amount and lays a foundation for application ofsubsequent analysis and classification of hyperspectral remote sensing image mixed end members and the like.

The invention discloses a method and a device for achieving multi-pipe data transmission in an embedded system. The multi-pipe data transmission is achieved by creating a dynamic channel between entities in a host computer network; and a corresponding transmission buffer zone is arranged for each pipe. Thus, the situation the pipes may cross is avoided; a data transmission error between the entities is reduced, and the reliability of data transmission is improved. The dynamic pipe can be dynamically created and deleted, so that long-term occupation of management resources is avoided; and the resources of the host computer are saved. In addition, by adopting the technical scheme provided by the invention, centralized control also can be achieved; a network topology is supported, and the device is simple in facility, convenient to deploy, suitable for various application scenes, strong in error handling capacity and compatible with various hardware platforms, and supports a plurality of data carriers at the bottom layer.

The invention discloses a flexible material rewinding slitting system and a rewinding slitting mechanism thereof. The mechanism comprises a machine frame and two rewinding rollers which are assembled on the machine frame in a rotation mode. A slitting pressing roller is assembled above the middle portions of the two rewinding rollers in the rotation mode. The slitting pressing roller moves along the radial direction of a rewinding core shaft so that the rewinding core shaft is pressed between the slitting pressing roller and the two rewinding rollers. At least one rewinding roller is a driving roller for achieving rotation of the rewinding core shaft. Annular slitting cutters are distributed on the outer periphery of the slitting pressing roller in the radial direction in a spaced mode and extend along the circumferential direction of the slitting pressing roller, and flexible material rolls are slit by the annular slitting cutters. A working mode of slitting while rewinding is adopted by the rewinding slitting mechanism, compared with the prior art, the inter-related phenomenon of the flexible materials is avoided, the positions of the slitting pressing roller, the rewinding core shaft and the rewinding rollers are relatively closer, occupied space of the whole rewinding slitting mechanism is compressed, the length of the rewinding slitting system of the rewinding slitting mechanism is compressed, and the flexible material rewinding slitting system and the rewinding slitting mechanism of the flexible material rewinding slitting system are simple and compact in structure.

The invention discloses a ring-shaped winding machine which comprises an open-type machine head, an electric cabinet, a transmission mechanism, a wire storage mechanism, a winding mechanism and a wire arranging mechanism, wherein the wire arranging mechanism comprises a mounting seat, a driving rubber wheel provided with a tray and a driven rubber wheel, and the driving rubber wheel provided withthe tray is connected with a second transmission mechanism in a transmission way; the wire storage mechanism is provided with a wire storage ring, the winding mechanism is provided with a gear provided with an opening, and the gear provided with the opening is connected with a first transmission mechanism in a transmission way and connected with the wire storage ring when rotating clockwise. The ring-shaped winding machine is characterized in that the second transmission mechanism is driven by a stepper motor, the electric cabinet is internally provided with a singlechip control system, a wire distance amending button is arranged on the electric cabinet, the stepper motor is controlled by a singlechip, and the wire distance amending button is electrically connected with the singlechip. The ring-shaped winding machine can increase or reduce the number of wire distance pulse by the control of the wire distance amending button and the singlechip, so that enamelled wires can be accuratelywound into a wire groove all the time, and the phenomenon of wire jumping or overlapping can be stopped.

The invention provides an algorithm of connection matching of entry and exit lanes of crossing without lane lines. The algorithm comprises the following steps of: acquiring the number of entry and exit lanes of the crossing without lane lines; judging whether the crossing is a wide entry and narrow exit crossing or a narrow entry and wide exit crossing or an entry and exit equaled crossing; calculating the number of exit / entry lanes needed to be connected with each entry / exit lane; and calculating a start number of the exit / entry lanes connected with one entry / exit lane. With the method, establishment of a connection relation between entry and exit lanes of the crossing without lane lines can be completed by a simple and high-efficiency algorithm.

The present invention discloses an orange splitting technology in orange can processing. Firstly, orange balls are soaked in clear water, then the orange ball is hold in one hand hold, a splitting bow is hold in the other hand, and the orange is split by the splitting bow. The splitting technology of the present invention prevents fingers from squeezing orange segments; specific operation is relatively detailed, standard and comprehensive; the splitting technology is convenient for instructing and training, but most of all, can directly reduce the number of orange segments oozing juice, thereby preventing juice from oozing crossover; and the splitting technology attains split orange segments of high quality, and can, to a certain extent, improve production efficiency and product quality, and reduce raw material consumption.

A wafer container providing improved wafer restraint during physical shock events. In embodiments of the invention, a secondary wafer restraint structure defining a plurality of notches is interposed between opposing wafer restraint members on the door of the container. The notches may be defined by one or more converging edges or surfaces meeting at a junction. The junctions are positioned so as to align with the wafer receiving portions of each opposing pair of wafer restraint member so that when the door is fully sealingly engaged with the enclosure of the container, the edge of the wafer is contacting the junction. In this position, any vertical movement of the wafer due to shock imparted to the container causes the wafer to contact the converging surfaces or edges, thereby limiting such movement. The positioning of the secondary wafer restraint structure between and proximate opposing fingers of the primary wafer restraint limits deflection of the wafer between support points and thereby further inhibits the wafer from ''jumping'' out of the supports and cross-slotting.

Output properties of a fuel cell can be improved by using a single cell structure 1387 having an anode 102 and an oxidizing agent electrode 108 in both sides of a solid electrolyte membrane 114 and an evaporation inhibiting layer 1388 covering the surface of the cathode 108 which is not in contact with the solid electrolyte membrane 114.

The invention discloses a leaky cable wrapping forming method which comprises a longitudinal wrapping platform. The longitudinal wrapping platform is sequentially and coaxially equipped with a first longitudinal wrapping forming die, a second longitudinal wrapping forming die, a longitudinal wrapping forming conical barrel, a lapping die, a first sizing die and a second sizing die. Die cavities of the first longitudinal wrapping forming die and the second longitudinal wrapping forming die are connected into a whole streamline die cavity. The longitudinal wrapping platform is equipped with a core shaft support; the core shaft support is equipped with a core shaft; the core shaft is arranged in the whole streamline die cavity; and the core shaft cooperates with the first longitudinal wrapping forming die and the second longitudinal wrapping forming die to form a longitudinal wrapping type cavity. The method solves the problems of deformation of slots in a copper strip, tensile failure and position change of the copper strip since the copper strip does not swing left and right in the forming process, so that the quality of the product is improved, and higher uniformity is realized; and since the existence of a tongue coating, the two side edges of the copper strip are allowed to be always in the same position, the case of cross folding is prevented, and the qualified rate of the product is improved.

The invention discloses a novel cable intelligent rolling device which structurally comprises a first connecting plate, a supporting base, a ribbed plate, a fixed lug base, a supporting leg, a first supporting column, a motor, a power mechanism, a cable rolling mechanism and a support plate. The two ends of the first connecting plate are installed on the inner side of the supporting base in a welding manner, the power mechanism is connected with the supporting base through the ribbed plate, the top of the supporting leg is perpendicularly connected with the power mechanism, the bottom of the supporting leg is perpendicularly installed on the supporting base in a welding manner, structures installed on the cable rolling mechanism comprise a cable guide device and a cable guide plate, a cable penetrates the cable guide device to be fixed to a cable fixing device, the cable can be orderly arranged on a rolling barrel under the guide effect of the cable guide plate, and the phenomenon of cable staggering in the cable rolling process is prevented; and a tensioning adjusting device is installed inside the power mechanism, the tension force between the motor and the rolling barrel, and idling of the rolling barrel is prevented.

The invention discloses a dual-frequency dual-circularly-polarized common-aperture antenna for satellite communication. The dual-frequency dual-circularly-polarized common-aperture antenna comprises a first dielectric substrate, a second dielectric substrate and a third dielectric substrate which are sequentially stacked from bottom to top; the bottom surface of the first dielectric substrate is provided with a feed network structure, and the top surface is provided with a metal ground; a low-frequency radiation unit is arranged on the top surface of the second dielectric substrate; a high-frequency radiation unit is arranged on the top surface of the third dielectric substrate; the feed network structure comprises a low-frequency port feed network structure and a high-frequency port feed network structure, and band-pass filtering structures are arranged in the feed network structures respectively; and the high-frequency and low-frequency port feed network structures are connected with the high-frequency and low-frequency radiation units through the slot coupling structures respectively. According to the invention, the high port isolation is realized by introducing the band-pass filtering structure, the feed network structure is connected with the radiation unit through the slot coupling structure, and impedance and axial ratio bandwidth are improved by introducing the slot coupling structure; the high-frequency and low-frequency radiation units are designed in a layered manner, so that the overall size of the antenna is reduced; the overall design is simple and the weight is light.

The invention belongs to the technical field of fiber winding equipment, and particularly relates to rapid winding equipment for super-multi-tow fibers. Guide body units are uniformly mounted on a core assembly in the circumferential direction through moving bodies, and a rail shell of the core assembly is connected and mounted to a supporting rack of a radial movement driving system through bolts. A rotary driving system is connected and mounted on the rail shell of the core assembly through a bolt. According to the rapid winding equipment for the super-multi-tow fibers, the guide body units which are uniformly distributed on the circumference are driven by track gears based on the Archimedes curve principle to simultaneously and synchronously stretch and retract in the radial direction; bevel gears which are uniformly distributed on the circumference are driven by a gear disc, so that a wire guide tube generates synchronous rotation angles at the same time; the existing single-bundle or few-bundle fiber winding process is broken through, single-layer synchronous winding is realized, and the winding efficiency is improved; and the phenomenon of fiber crossing caused by single-bundle winding is avoided, so that the phenomenon of stress concentration is greatly reduced.

The invention discloses a technology for testing a pearlite in a low carbon steel structure in mesophase spheroidizing annealing, wherein, the technology comprises the following stages, a heating stage: heating a sample of the low carbon steel to a test temperature between a complete austenitic temperature Ac3 and a pearlite transition temperature Ac1; an insulation stage: maintaining for a certain insulation time according to the test temperature; a cooling stage: precipitating and depositing a carbide on a fine carbide core through the proper cooling temperature, finally forming carbide particles shaped in a similar to a spherical shape for achieving the effect of spheroidizing pearlite. According to the technical schemes, a plurality of intersect tests for determining process parameters can be avoided, and the frequencies and the time of tests can be also reduced; the structural and mechanical properties can be improved, the production efficiency can be improved as well as energy consumption can be reduced, the technology provided in the invention has high economic values in the production process.

Provided is a wire splitting mechanism. The mechanism comprises a baffle device, a twisting device and a work table, and the baffle device is adopted as a base plate when multiple core wires of a USB cable are pressed, and provides a support effect for the core wires; the twisting device is used for twisting and scattering the multiple core wires; the baffle device and the twisting device are fixedly connected to the work table separately. Through the wire splitting mechanism, the multiple core wires of the USB cable can be effectively scattered on a plane, and the wire splitting mechanism is simple in structure, low in cost, stable and reliable. Through effective scattering of the wires, automation of the process of packaging the wires into a clamp is effectively promoted, the production efficiency is improved, the production reject ratio is reduced, and meanwhile the production cost is saved.

The invention discloses an after-loading radiotherapy plan and 3D printing template integrated simulation design method and system. The method comprises the steps: obtaining a source application column three-dimensional model after the filling of a source application column, obtaining a medical image after the filling of the source application column, marking a tumor target in the medical image, obtaining target point cloud data, and defining a needle insertion region in a specified range of the source application column; generating a needle channel sequence, setting a plurality of radioactiveparticles in a needle channel in the sequence P, and calculating and optimizing residence points and residence time of the radioactive particles by utilizing a gradient method so as to meet set dosedistribution; generating a template containing a source application column; and printing a three-dimensional model of a template, a needle channel sequence P and other data through a 3D printing technology. Compared with the prior art, the scheme provided by the invention has the advantages that the high dependence of traditional after-loading radiotherapy operation plan making on the experience of doctors is relieved, and the efficiency of treatment plan making is improved. In combination with the 3D printing technology, the treatment plan can be reproduced in the physical model, and the quality of actual treatment is guaranteed.

The invention provides a human body posture estimation method and system, and the method comprises the steps: inputting an image into a coder-decoder network which comprises four coding layers and four decoding layers for training, and outputting a semantic segmentation result; converting the pixel semantic probability graphs obtained in the first two coding layers into edge activation pixel graphs by utilizing an energy function, wherein the activation value of a pixel is greater than an activation value threshold, and the pixel is an edge pixel; gathering pixels belonging to the same instance based on semantic tags in the semantic segmentation result to obtain an instance segmentation result, wherein the instance segmentation result comprises a mask representing the instance to which each pixel belongs; and generating a human body skeleton confidence map by using a full convolutional network, outputting a skeleton component label to which each pixel in each instance belongs, regressing joint point positions through a full connection network, and connecting joint points in each instance to construct a skeleton structure of a human body to obtain human body posture information. According to the method and the system, the crossing phenomenon existing in posture estimation between people is improved.

The invention discloses an aluminum sheathed fire-proof cable and a preparation method thereof. The fire-proof cable comprises outer skin, wherein the inner side wall of the outer skin is fixedly connected with an aluminum sheath layer, the inner side wall of the aluminum sheath layer is fixedly connected with connecting seats, the right end of each connecting seat is fixedly connected with an abutting block, the middle position of the connecting seats is provided with a wrapping sleeve, the connecting seats are fixedly connected with the wrapping sleeve, the wrapping sleeve is internally provided with second cable accommodating pipes, the wrapping sleeve is fixedly connected with the second cable accommodating pipes, the middle position of the second cable accommodating pipes is providedwith a first cable accommodating pipe, and the first cable accommodating pipe is fixedly connected with the wrapping sleeve. The cable is provided with the aluminum sheath layer and can be insulated by the aluminum sheath layer even if the outer skin of is burned out when the cable is subjected to external burning, thereby preventing the external flame from burning out the internal structure of the cable.

The invention discloses a hot tinning device for copper doubled wires. The hot tinning device comprises a pay-off mechanism, a cleaning mechanism, a tinning mechanism and a take-up mechanism which are sequentially arranged from back to front, wherein the pay-off mechanism comprises a pay-off rack, pay-off guide wheels, tensioning rollers and wire distributing plates, and the pay-off rack is provided with pay-off reels wound with the bare copper doubled wires; the bare copper doubled wires bypass the tensioning rollers and are guided to the wire distributing plates through the paying-off guide wheels; the cleaning mechanism comprises a cleaning tank and cleaning felt arranged in the cleaning tank; copper single wires make contact with the surface of the cleaning felt; the tinning mechanism comprises a tinning furnace, and a tinning mold for the copper single wires to penetrate through is mounted on the tinning furnace; and the take-up mechanism comprises a take-up rack, take-up guide wheels and doubling guide wheels, the take-up rack is provided with take-up reels, and the copper single wires are guided by the take-up guide wheels and then wound on the take-up reels after passing through the doubling guide wheels. According to the hot tinning device, the technological process of simultaneous paying-off and wire distributing, simultaneous tinning, simultaneous taking-up and doubling of a plurality of the copper single wires is realized, so that the copper wire tinning technological process is relatively short, the occupied space of a production line is saved, and the tinning efficiency is improved.

The invention discloses a network equipment cabinet capable of automatically controlling temperature and exhausting air, the network equipment cabinet comprises a cabinet main body, wherein a baseboard is fixedly arranged on the outer surface of the bottom end of the cabinet main body, a sliding rail is arranged on the upper surface of the front end of the baseboard, a top cover is fixedly arranged on the outer surface of the upper end of the cabinet main body, and the outer surface of the front end of the top cover is provided with a vent hole, the network equipment cabinet is equipped with atemperature sensor, a bunched wire hole, an exhaust fan and a retractable door, so that the internal temperature of the cabinet can be detected well, the effect of automatically controlling temperature and exhausting air can be achieved with the exhaust fan, the connecting wires between the equipment can be well limited and fixed, the internal wires of the cabinet main body can be effectively prevented from being disordered and crossed, and the cabinet can well slide freely on the upper surface of the sliding rail and can well slide to the interior of the cabinet door frame, thereby effectively saving the space volume and bringing about a better use prospect.

A power cord winder for vacuum cleaner is composed of a base, a reel, a brake unit and a guide wheel unit of power cord. The brake unit consists of control lever, braking drum and braking spring. The guide wheel unit comprises guide wheel with slot and spring. It features that the power cord is orderly wound on the reel turn by turn close to each other.

The invention belongs to the technical field of fiber winding equipment, and particularly relates to novel multi-bundle fiber spiral winding equipment. A rotating system is mounted on the outer side of a right rack through a bolt, a radial moving system is mounted on the outer side of a left rack through a bolt, and the rotating system is connected with a shifting fork of the radial moving system through a notch of a hoop. According to the novel multi-bundle fiber spiral winding equipment, bevel gears, which are evenly distributed on the circumference, are driven through a gear disc in a meshed mode, so as to guarantee that rotating angles transmitted to a yarn guide pipe are synchronous; a spiral disc notch and a guide disc notch are combined, a spiral disc is rotated, and therefore, it is guaranteed that the yarn guide pipes conduct radial movement synchronously at the same time; through joint control of a rotary driving system and the radial moving system, it is guaranteed that the yarn guide pipes evenly distributed in the circumferential direction move consistently. The existing single-bundle or few-bundle fiber winding process is broken through, single-layer synchronous winding is realized, and the winding efficiency is improved; and the phenomenon of fiber crossing caused by single-bundle winding is avoided, so that the phenomenon of stress concentration is greatly reduced.

The invention relates to the technical field of electronic equipment, and discloses a plug adapter structure for a household common power socket. The structure comprises a main power line, wherein oneend of the power main line is fixedly connected with a switching device, one end of the main power line passes through the switching device to extend to the interior of the switching device, and oneend of the main power line is fixedly connected with a connecting line. One end of the connecting line is wound around a rotating rod, and one end of the rotating rod is fixedly connected with a fixedrod. One end of the fixed rod is movably connected with the top of the inner cavity of the switching device. According to the invention, the cooperation of the main power line and the switching device enables one main power line can be connected to different plugs, thereby avoiding a problem that a main power line of one type only can be adapted to the same type of connectors, and improving the universality of the main power line. The cooperation of the rotating rod and a first torsional spring enables the connecting line to be wound around the rotating rod, thereby avoiding a bared cable outside the main power line.

The invention discloses a SiC MOSFET sub-module unit and crimping type packaging thereof, belongs to the technical field of semiconductor device packaging, and solves the problem that an existing SiC power chip is difficult to crimp and package. Each SiC MOSFET sub-module unit comprises a DBC (Direct Bond Copper) ceramic substrate, a source electrode molybdenum sheet, a SiCMOSFET chip array and a drain electrode molybdenum sheet; and N SiCMOSFET chips are arranged on the upper surface of the source electrode molybdenum sheet, N first protrusions are symmetrically arranged on the lower surface of the source electrode molybdenum sheet, the first protrusions are connected with the N SiCMOSFET chips respectively, grid electrodes and source electrodes of the SiCMOSFET chips are exposed, N second protrusions used for connecting and positioning the SiCMOSFET chips are arranged on the upper surface of the drain electrode molybdenum sheet, the SiCMOSFET chip array is composed of the N SiCMOSFET chips, and the exposed grid electrodes and source electrodes of the SiCMOSFET chips are connected to the DBC ceramic substrate. The power density of the module is improved, the heat dissipation capability is enhanced, the reliability of the device is improved, the insulation level of the module is improved by filling the module with silica gel, and the module can be applied to the high-voltage field.

The invention discloses an ETS protection system in steam turbine emergent interruption protection, and relates to the technical field of steam turbine emergent interruption protection. The problem that in existing steam turbine emergent interruption protection, a hydraulic control system oil protection system, a condenser vacuum protection system and a lubricating oil protection system have the cross interaction, cross maloperation is prone to being caused, and therefore tripping of a unit is caused is solved. By means of the ETS protection system, the logical relationship in the ETS protection system is improved, the improved protection system can give out a tripping signal only when two channels for the condenser vacuum pressure, the hydraulic control system oil pressure or the lubricating oil pressure simultaneously move to give an alarm, and the cross maloperation is accordingly avoided. The ETS protection system is suitable for steam turbine emergent interruption protection.

The invention discloses a movable light-guide fiber display which structurally comprises a handle, a control switch, a movable box and a display screen. The movable box is provided with a light sourceplate, a fixed plate, a scaling mechanism and a transparent plate. A pressure block in a blocking mechanism is scaled through a controller in a telescopic device, when a telescopic mechanism is retracted, a bent rod is stressed and bent inwards to block light, so that the irradiation range in an irradiation hole is prevented from being too dense, the intensity of the light is adjusted, the diffraction phenomenon caused by too dense irradiation is avoided, and the visual effect at the edge of the pattern is prevented from being influenced by light cross; and the refractivity of a light sourceemitted by a bent mirror is controlled, so that light rays are in a good uniform scattering state, the light rays are prevented from forming a cross phenomenon, the light rays enter a reverse transparent mirror in a scattering structure and are refracted and diffused from rhombic holes after being focused, the light rays reach a uniform state, light sources are scattered orderly, and the problem of non-uniform brightness caused by scattering deviation is solved.

The invention discloses an efficient near-field large-size and small-size target ISAR imaging method based on backward projection. The method comprises the steps that an image data matrix is initialized; acquiring a distance time domain image by using a target backward electromagnetic scattering echo signal corresponding to the azimuth view angle; based on the distance from the radar antenna to the central scattering point of the target, the distance between any scattering point on the target except the central scattering point and the radar antenna, the distance time domain image and the image data matrix, obtaining an imaging result under the current visual angle; and superposing imaging results under all visual angles to obtain a near-field ISAR imaging result. According to the method, near-field ISAR fine imaging of targets with large and small sizes can be realized, the operand is reduced, and the target detection, recognition and resolution capabilities are improved.

The invention discloses a prestressed steel stranded wire drawing head. The prestressed steel stranded wire drawing head comprises a first flange and first locating plugs, first fixed holes are formed in the outer edge of the first flange, a body is fixedly arranged at the right side of the first flange, a second flange is installed at the right end of the body, second fixed holes are formed in the outer edge of the second flange, a drawing head body is fixedly arrange at the right side of the second flange, first locating plates are connected to the outer sides of the first locating plugs, connecting rods are fixedly arranged at the right sides of the first locating plates, second locating plates are installed at the right ends of the connecting rods, second locating plugs are fixedly arranged among the second locating plates, and a wire inlet is formed in the inner side of the drawing head. The first locating plugs, the first locating plates, the second locating plugs and the second locating plates are arranged in the prestressed steel stranded wire drawing head, the occurrence of a phenomenon that a prestressed steel stranded wire is drawn and loosen can be prevented, and through cooperative work of the second locating plates and the wire inlet, the phenomenon that the prestressed steel stranded wires wind and cross in the device is effectively prevented from occurring.