401 results about "High radiation" patented technology

The invention discloses a passive radiation refrigeration coating and a preparation method thereof, and relates to the technical field of industrial coatings. Comprising a fluoroacrylate emulsion, hollow glass beads, nano titanium dioxide, flaky silicon dioxide aerogel powder, polytetrafluoroethylene micro powder, hydroxyl-terminated polydimethylsiloxane, a hydroxyl acrylic acid modified silane coupling agent, a super-hydrophobic modified fluorosilicone surface additive, nano cerium oxide, aluminum fluoride doped zinc oxide infrared enhancement powder and deionized water. The paint is prepared on the basis of the formula. According to the invention, a multi-scale spectrum regulation and control and surface self-cleaning system is constructed cooperatively, so that the synergistic effect of high reflection of a sunlight region and high emission of a middle infrared region is realized. The coating can maintain continuous passive refrigeration in a day and night period, the surface of the coating has self-cleaning capability and excellent ultraviolet aging resistance, and high reflectivity and high radiation emissivity can be maintained for a long time in a complex outdoor environment, so that the thermal management efficiency of buildings and equipment is remarkably improved.

The invention discloses a linear polarization scattering reconfigurable array antenna, which belongs to the technical field of antenna manufacturing and comprises an antenna unit, an extension socket, a transmission type phase shifter and an inductor. The antenna unit comprises a radiation patch, a first dielectric substrate, a metal via hole, a metal patch, a second dielectric substrate, a perforated metal floor, a third dielectric substrate, a feed metal column and a radio frequency coaxial connector, the radio frequency coaxial connector is connected with the radiation patch through the feed metal column, and a variable capacitance diode and a capacitor are arranged on the transmission type phase shifter. The transmission type phase shifter is connected with the radiation patch through the feed metal column, the variable capacitance diode is connected with the punching metal floor, the bottom of the third dielectric substrate is provided with a direct current bias line, the direct current bias line is connected with the transmission type phase shifter through the inductor, and the transmission type phase shifter is connected with the radiation patch through the feed metal column. According to the invention, flexible regulation and control of antenna scattering beams can be realized, and the antenna has the characteristics of flexible control, fast response speed and high radiation efficiency.

The invention provides an under-water discharge machining system and method for a radiation environment. The under-water discharge machining system comprises a pulse power supply control system, an electric spark machining head device and a servo control system. The pulse power supply control system comprises a power supply control box, a rectifier and a power amplifier which are electrically connected in sequence. And the power amplifier is electrically connected with the servo control system and the electric spark machining head device. The electric spark machining head device is provided with a feedback signal wiring connected to the servo control system. The pulse power supply control system is matched with the servo control system to drive the electric discharge machining head device to guarantee the process of the workpiece to be machined, so that the problem that conventional electric discharge machining equipment cannot be used in the high-radiation and boron-containing water environment is solved.

The invention discloses a low RCS broadband array antenna based on modification processing and a wave absorbing material and a design method of the low RCS broadband array antenna. The design method comprises the following steps: firstly, designing an ultra-wideband Vivaldi antenna working in an X wave band; then analyzing the radiation and scattering surface current distribution of the antenna in the X wave band, and carrying out shaping processing on the antenna according to a simulation result; performing array design on the designed antenna to form an array antenna; and finally, analyzing the surface current in the radiation and scattering states of the array antenna, covering a higher scattering current area with a wave absorbing material, and reserving a high radiation current area of an antenna slot line area so as to reduce the RCS and reserve the radiation performance of the antenna. The low RCS broadband array antenna is designed by adopting the design method. According to the invention, the design requirements of high gain, high directivity and low RCS of the broadband array antenna are met, the effects of in-band RCS reduction, radiation performance maintenance and multi-angle reduction are considered, and the application of the antenna is expanded.

The invention provides a physical layer wireless intrusion detection scheme based on an electromagnetic map, and belongs to the technical field of physical layer intrusion detection. The method comprises the following steps: carrying out interpolation processing on incomplete electromagnetic data by utilizing a random forest algorithm so as to construct an electromagnetic map; extracting a phase difference of channel state information (CSI) of a radiation source contained in the electromagnetic map, and converting the phase difference into a thermodynamic diagram; reconstructing and mapping the thermodynamic diagram by using a WGAN-Encoder model, and carrying out intrusion radiation source identity recognition by combining an output feature residual error and an abnormal score obtained by a thermodynamic diagram reconstruction error; radiation source detection and tracking are executed through the electromagnetic map updated in real time, so that physical layer intrusion detection is completed. The problems that the real-time performance and accuracy of electromagnetic signal distribution reconstruction are not high, and CSI feature extraction in radiation source identity recognition is seriously interfered by time-varying factors are solved.

The utility model relates to the technical field of temperature measurement, in particular to a radiation thermometer calibration device which comprises a box body, a control system and a radiation cavity are arranged in the box body, a black body radiation plate is arranged in the radiation cavity, a radiation window is arranged on the front side of the box body and communicated with the radiation cavity, a sealing cover is arranged on the radiation window, and a calibration interface is arranged on the sealing cover. The calibration interface is wrapped by an elastic silica gel pad, the control system comprises a controller, a temperature sensor and a power supply module, the power supply module is installed in the box body, and stable black body radiation and accurate temperature are ensured through a stable black body radiation plate and an accurate temperature control system, so that the calibration precision of the radiation thermometer is improved, and the calibration precision of the radiation thermometer is improved. A plurality of temperature sensors are arranged in the radiation cavity, temperature distribution is monitored in real time, temperature uniformity is ensured, calibration accuracy is further improved, a handle is hinged to the top of the box body, an elastic rubber mat is wrapped, friction and noise are reduced, and user experience is improved.

The invention relates to a microstrip patch antenna based on an antipodal double-helix groove, which comprises the antipodal double-helix groove, a patch, a substrate, a grounding plate and a coaxial probe, and is characterized in that the substrate is mounted on the grounding plate, the patch is mounted on the substrate, the antipodal double-helix groove is formed in the patch, and the coaxial probe sequentially penetrates through the grounding plate, the substrate and the patch; the coaxial probe is used for feeding the patch, and a radio frequency electromagnetic field is generated between the patch and the grounding plate. According to the microstrip patch antenna, the antipodal double-spiral grooves are formed, the path length of current flowing through the patch is increased, the resonant frequency of the antenna is reduced to a large extent, meanwhile, the good radiation characteristic is kept, the antenna radiation efficiency is high, the directional diagram is regular, and the electrical size of the microstrip patch antenna is reduced while the high radiation efficiency is kept.

The invention discloses a preparation method of a rare earth modified SiO2 film with high radiation resistance, high mechanical property and high antireflection. Polyethylene glycol is used as a pore-foaming agent, tetraethyl silicate and methyltriethoxysilane are used as precursors, absolute ethyl alcohol is used as a solvent, nitric acid is used as a catalyst, and rare earth elements are used as an anti-radiation agent. The prepared SiO2 sol is coated on glass, the sol is dried into gel, and the porous nano-film is obtained through heat treatment. The spectrum average transmittance (transmittance of coated glass) of the film at 400-1100 nm is 93.1%, and is improved by 4.57% compared with that of glass; the surface hardness of the film reaches the highest level 9H of a pencil method, and the adhesive force also reaches the highest level 0 of an adhesive tape method. After 5000 equivalent solar hours are irradiated by ultraviolet rays, the average transmittance of the film is 92.25% and is only reduced by 0.85%. The high-radiation-resistance, high-mechanical-property and high-antireflection film is simple in preparation process and suitable for industrial popularization.

The invention discloses a special inspection device and method for the performance of a reactor core measurement cable, and the device comprises a detection box which is internally provided with a cable which can be connected with transmission detection equipment and is of a J-shaped structure; the method comprises the following steps: S1, installing a cable in a detection box, opening environment endowing equipment, and providing a high-temperature, high-pressure and high-radiation independent environment or composite environment for the cable in the detection box; according to the invention, the equipment simulates a reactor core composite environment by setting an environment, applies bending, torsion and tensile / compressive stress to the cable in cooperation with the mechanical strength detection structure, detects the mechanical strength dynamic characteristics of the cable in the composite environment, and detects the transmission performance of the cable in combination with the transmission detection equipment. The performance of the reactor core measuring cable can be comprehensively and truly detected, the reliability and the residual service life of the cable can be more accurately evaluated, and a reliable basis is provided for quality control and use of the reactor core measuring cable.

The invention belongs to the technical field of radioactive metal isotope ion chromatographic separation, and discloses a medical radioactive isotope purification multichannel ion liquid chromatography system. The system comprises an automatic sample injection system, a parallel sampling and leaching channel, a parallel multi-column chromatographic structure, an online radiation dose monitoring module, a multi-channel tail end detection system, a recycling structure and a central control system. By adopting a full-automatic sample injection and multi-channel parallel chromatography structure, parallel separation, real-time radiation monitoring, multi-mode online detection and closed-loop recovery are realized, and the problems of insufficient nuclear purity, low separation efficiency, low target recovery rate and high radiation exposure of a traditional method are solved.

The invention discloses a phase-change radiation refrigeration coating which is prepared by the following steps: dispersing nano aluminum oxide particles in phase-change paraffin in advance to form a high-thermal-conductivity and high-radiation composite phase-change material, and encapsulating the high-thermal-conductivity and high-radiation composite phase-change material in a porous ceramic skeleton through vacuum infusion to obtain composite phase-change ceramic particles; then, the composite phase-change ceramic particles are dispersed in polyol resin containing aluminum oxide microspheres, the aluminum oxide microspheres accurately block pores in the surface of the porous ceramic through particle size matching, paraffin leakage is prevented, and the aluminum oxide microspheres serve as heat conduction channels and radiation units at the same time, so that it is guaranteed that the finally prepared coating integrates phase-change temperature control, efficient heat conduction and radiation refrigeration; the high sunlight reflectivity (94%-98%) and the high atmospheric window infrared emissivity (92%-96%) are achieved, and the thermal response rate and the leakproof performance are remarkably improved.

According to the single-polarized omnidirectional ceiling antenna provided by the utility model, the micro-arc oxidation ceramic layer is arranged on the surface of the aluminum radiation oscillator, so that oxidation and corrosion of the aluminum radiation oscillator are effectively prevented, and the copper plating layer is arranged on the micro-arc oxidation ceramic layer, so that the conductivity of the aluminum radiation oscillator is improved, and the signal transmission quality of the antenna is improved. And finally, a layer of nickel-phosphorus alloy is plated on the copper plating layer, so that the radiation oscillator has good wear resistance and hardness, the durability and the stability of the radiation oscillator are improved, the cost is greatly reduced compared with a copper radiation oscillator, and the radiation oscillator is suitable for different use environments. In addition, a plurality of copper short-circuit sheets coated with ferrite wave-absorbing coatings are arranged on the peripheral side of the radiation oscillator at equal intervals, so that the performance of the antenna is further optimized, and the anti-interference capability and the signal transmission efficiency of the antenna are improved.

The application provides a sealed weld cutting device and method, which comprises a base, a rotary driving assembly arranged on the base, a cutting mechanism, a connecting assembly, a positioning adjusting assembly for adjusting the cutting position, and a control assembly, the rotary driving assembly is drivingly connected with the cutting mechanism through the connecting assembly, the positioning adjusting assembly comprises an axial positioning assembly and a radial positioning assembly, the axial positioning assembly is arranged on the base and connected with the connecting assembly, the radial positioning assembly is arranged in the cutting mechanism, and the axial positioning assembly and the radial positioning assembly are both in communication connection with the control assembly.In the application, the base, the rotary driving assembly, the cutting mechanism, the connecting assembly and the positioning adjusting assembly are arranged, the cutting position is aligned with the sealed weld through the positioning adjusting assembly, and the remote control is realized through the control assembly, so that the problems of narrow space, high radiation and unreachable personnel in the nuclear reactor are solved, and the remote control and the accurate alignment of the cutting position are realized.

This application provides a method and apparatus for extracting radiation information based on subatomic properties. The method includes: determining a remote sensing satellite image of a survey area; preprocessing the remote sensing satellite image of the survey area to determine a corresponding remote sensing satellite image of a target substance; developing and drying the remote sensing satellite image of the target substance to determine a corresponding exposed image film of the target substance; filtering the film image after printing according to a preset optical filter to determine a corresponding anomaly of the substance to be tested; receiving the anomaly of the substance to be tested according to a preset information carrier; irradiating the information carrier after receiving the anomaly according to a set subatomic field generator and an ultraviolet radiation source to determine a corresponding radiation anomaly image of the substance to be tested; and determining the corresponding radiation information of the substance to be tested according to the radiation anomaly image. This application can improve the efficiency and accuracy of radiation information extraction.

This invention provides an artificial surface plasmon full-space beam scanning leaky antenna, comprising a dielectric substrate. The upper and lower surfaces of the dielectric substrate form a top layer and a bottom layer, respectively. The top layer of the dielectric substrate has a balun structure, an artificial surface plasmon strip group, and several metal stubs. Balun structures are symmetrically arranged at both ends of the artificial surface plasmon strip group. Several metal stubs are periodically arranged and symmetrically arranged on the upper and lower sides of the artificial surface plasmon strip group. The artificial surface plasmon strip group includes a pair of slidingly symmetrical artificial surface plasmon strips. This invention enables continuous scanning of the main beam from back-firing to front-firing, possessing full-space beam scanning capability. It has advantages such as small bandwidth occupation, high radiation efficiency, high directivity, high gain, low profile, and relatively small overall size, and can be applied in wireless communication fields such as automotive radar.

The invention relates to a front sight laser aiming auxiliary device which is used for guiding a kirschner wire to present a point-shaped perspective shadow on a C-arm screen in an orthopedic operation, and belongs to the technical field of medical instruments. The device aims at solving the problems that in traditional Kirschner wire perspective point forming operation, repeated perspective depends on the experience of an operator, radiation exposure is large, and operation precision is difficult to guarantee. The device mainly comprises a front sight base which can be fixed on the surface of a receiver of the C-arm machine, wherein a ball head base is arranged in the center of the front sight base; and the ball head laser indicator is arranged on the base and is adjustable in laser direction. When in use, the perspective image is adjusted to the central position of the front sight on the screen by moving the metal point on the operating table. Installing a laser lamp, adjusting the laser lamp to irradiate on a metal point on an operating table, and screwing a nut to fix the position of the laser lamp at the moment. Therefore, a visible laser guide line coinciding with the path of the target X-ray beam is established. And an operator only needs to adjust the guide needle along the laser ray and place the guide needle, so that the guide needle can be stably developed in a point shape in a perspective image, and accurate and rapid screw guide needle placement is realized. The device is simple in structure, low in cost, intuitive in operation, capable of remarkably reducing intraoperative radiation and reducing dependence on experience of operators, and suitable for being used in hospitals of all levels to carry out precise orthopedic surgery under perspective guidance.

The invention provides an underwater multifunctional laser optical assembly for a radiation environment. The underwater multifunctional laser optical assembly for the radiation environment comprises a laser source, a process optical fiber, a collimating lens, a reflecting mirror, a forming lens and a gathering lens. The process optical fiber is used for conveying a laser beam generated by the laser source to the collimating lens. The collimating lens is used for adjusting a laser beam transmitted by the process optical fiber from a divergent beam to a parallel beam. The reflecting mirror is used for changing the propagation direction of the parallel light beams to be perpendicular to the direction of the forming lens. The forming lens is used for adjusting the parallel light beams with the changed direction into the specific shape needed by welding. The focusing lens is arranged between the forming lens and the focusing surface in parallel and used for focusing the parallel light beams adjusted by the forming lens to the focusing surface for welding. According to the invention, the formed lens is matched with other lenses, so that the technical problem of how to apply the laser welding technology to a high-radiation underwater scene is solved.

The present application relates to a kind of nuclear power plant surge line nozzle heat shield sleeve structure and system, comprising: support ring, fluid distribution cover, heat shield sleeve, nuclear power plant surge line nozzle and cladding layer.The nuclear power plant surge line nozzle heat shield sleeve structure and system described above when actually used, through the one end of support ring and the cladding layer of surge line nozzle connection, the other end and fluid distribution cover connection, the one end of heat shield sleeve is inserted into support ring and is connected with support ring, to form gap between the other end of heat shield sleeve and the safety end of surge line nozzle, radioactive particles generated in the annular space between heat shield sleeve and surge line nozzle during reactor operation can be discharged from the gap, thereby avoiding the difficulty and cost of in-service inspection caused by the fact that the safety end of heat shield sleeve surge line nozzle forms a sealed space, so that the risk of high radiation faced by inspection and maintenance personnel is reduced.

The invention provides an efficient air conditioner refrigeration cycle device with a radiation subcooler, and belongs to the technical field of air conditioner refrigeration. A radiation subcooler is connected to a working medium flowing pipeline between the outlet end of a condenser and the inlet end of an expansion valve in series and used for conducting radiation heat exchange cooling on a high-temperature and high-pressure liquid working medium discharged from the condenser; the radiation subcooler comprises a subcooler shell, wherein the outer surface of the subcooler shell is coated with a high-radiation coating; the working medium heat exchange tube is arranged in the subcooler shell and is distributed in a spiral or snake shape; and the spoiler is of a spiral blade structure, is arranged on the outer wall of the working medium heat exchange tube in a sleeving manner and is tightly attached to the working medium heat exchange tube. The high-temperature and high-pressure liquid working medium flowing out of the condenser is further cooled through radiation heat exchange, so that the supercooling degree of the working medium is remarkably improved, the refrigeration cycle efficiency is improved, and the energy consumption of the air conditioner is effectively reduced.

The invention belongs to the technical field of special maintenance in a high-radiation environment of a nuclear power plant, and particularly relates to a digital power supply system and method for high-radiation boron-containing underwater electrical discharge machining. The AC external power supply is connected with an external power supply; the AC external power supply is connected with a rectification module; a synchronous trigger signal is input into the rectification module; the rectification module is connected with a filtering module; the protection module and the monitoring module respectively output signals to the rectification module, the storage module and the filtering module. The device has the beneficial effects that controllable and stable discharge machining operation power supply output is provided in the electric spark discharge machining operation process in a high-radiation boron-containing water environment such as a nuclear power plant, and the problem that a conventional discharge machining power supply cannot be used in the high-radiation boron-containing water environment is solved.

The invention discloses an infrared radiation calibration method and device considering a test distance, equipment and a storage medium. The method comprises the following steps: constructing an infrared radiation physical model considering the integral time of an infrared detector and the test distance of a target; and utilizing the training set and the coefficient learning network model to fit parameters in the infrared radiation physical model to obtain an optimal solution of the parameters, and applying the optimal solution to the infrared radiation physical model to complete infrared radiation calibration. According to the method, the influence of the test distance and the integral time on the relationship between the gray scale image and the radiation brightness is considered, so that the infrared radiation physical model is constructed, the accuracy of the radiation calibration result is improved, and the accuracy of the radiation calibration result is improved by utilizing the gray scale image under different test distance and integral time combinations. And parameters of the infrared radiation physical model are optimized by a training set consisting of the grey-scale maps and the black-body radiance corresponding to each grey-scale map, so that the infrared radiation physical model can set an optimal solution, and the measurement precision of the infrared radiation measurement system on the target radiance distribution is improved.

The application discloses a real-time path planning method fusing improved locust-dynamic window method, and comprises the following steps: S1, generating an initial path according to an improved A* algorithm, performing global path planning on the path in a radiation environment through an improved locust optimization algorithm, and determining the path from the starting point to the ending point; S2, performing local path planning according to the path through an improved DWA algorithm, and generating a planning path. Through the introduction of a position updating strategy considering radiation distribution information and an improved adaptive comfort zone coefficient, the influence of the radiation risk on path selection is more truly reflected, and the position updating process of the GOA is optimized. This enables the algorithm to effectively guide the locust population to avoid high radiation areas in a nuclear environment, and significantly reduces the radiation exposure risk. Through the combination of the global optimization capability of the improved A* algorithm, the initial population distribution of the locust optimization algorithm is improved, and then the convergence speed of the locust optimization algorithm is improved.

The invention relates to the field of automobile manufacturing, in particular to a coating, a sunshade curtain and a preparation method and application of the sunshade curtain. The coating is prepared from the following components in parts by weight: 30 to 40 parts of fluorine modified acrylic resin, 15 to 25 parts of titanium dioxide, 10 to 20 parts of zinc oxide, 10 to 20 parts of aluminum oxide modified PVDF-HFP (Polyvinylidene Fluoride-Hexafluoropropylene) composite particles, 5 to 10 parts of silicon carbide, 8 to 12 parts of hollow glass beads and 2 to 4 parts of auxiliaries. According to the coating, the excellent technical effects of high reflection, high radiation, low heat storage and ultra-strong durability are jointly achieved through specific selection and matching synergistic effect of the functional components.

The utility model discloses small-sized automatic code spraying and labeling equipment for a nuclear-grade environment. The small-sized automatic code spraying and labeling equipment comprises a label paper mounting module, a label paper guide module, a label paper position detection sensor, a label stripping module, a labeling module, a traction module and a waste paper collecting module. The device is small and compact in appearance size and can be shrunk and enlarged according to the size of label paper, and the hot chamber installation requirement is met; a transmission structure of the equipment adopts a synchronous belt for transmission, and the synchronous belt adopts a polyurethane steel wire belt for transmission, so that the equipment has certain radiation resistance; the bottom paper of the label is made of PVC, and the bottom paper is transparent, so that the label is convenient to detect and has certain strength and flexibility; the labeling module adopts a V-shaped unilateral moving design and can be compatible with bottles of different specifications; the whole equipment is made of a material with relatively high radiation resistance, so that the equipment has certain radiation resistance; parts of parts of the equipment are made of aluminum materials for weight reduction design, and the equipment is lighter than ordinary equipment.

The invention discloses a quasi-single-mode circular waveguide conical horn antenna, a radar and a communication device. The quasi-single-mode circular waveguide conical horn antenna comprises a circular waveguide section and a conical horn section. Conductor loss is reduced by remarkably increasing the diameter of the circular waveguide, and axial periodic annular grooves are formed in the inner wall of the circular waveguide to form a spatial mode filter and a selective attenuation high-order mode, so that high radiation efficiency and high mode purity are realized at the same time in a millimeter wave frequency band. And the conical horn section adopts an index profile to realize high-directionality radiation. The antenna structure effectively solves the technical problems of large loss and impure mode in a millimeter wave high-frequency band in the traditional design.

This application relates to an on-chip antenna and an on-chip antenna device. The on-chip antenna includes: a first antenna section having a parasitic patch disposed therein; a second antenna section having a radiating patch disposed therein and a feed line connected to the radiating patch, the feed line being used to feed a high-frequency signal to the radiating patch; and a carrier structure disposed between the first antenna section and the second antenna section, such that an air layer is formed between the parasitic patch and the radiating patch, allowing the high-frequency signal to be electromagnetically coupled within the air layer before being transmitted to the parasitic patch. The radiating patch can radiate the received high-frequency signal to the parasitic patch through the air layer to achieve signal transmission. This method of signal transmission via air can reduce signal transmission loss and improve radiation efficiency.

The present application belongs to the field of radiation cooling material design, and relates to a high-radiation cooling performance composite fiber membrane PVDF-HFP / PDMS and a preparation method thereof, characterized by preparing a composite fiber membrane with uniform single nanofiber and excellent radiation cooling effect by using a mixed solution of polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) and polydimethylsiloxane (PDMS). The preparation method has the advantages of simple preparation method, environmental friendliness, large-size preparation, easy scaling, etc., and makes up for the problems of the existing radiation cooling materials, such as insufficient daytime cooling effect, hydrophobicity, poor flexibility, insufficient tensile resistance and the like.

The invention belongs to the technical field of inorganic scintillator materials, and particularly relates to a multi-element co-doped yttrium lutetium silicate scintillator and a preparation method and application thereof, and the material has excellent comprehensive performance of high light output, short decay time, high radiation hardness, high matching degree of emission spectrum and novel photoelectric sensors and the like. The invention further relates to a preparation method of the scintillator material and application of the scintillator material in radiation detection fields such as positron emission tomography (PET), time flight PET (TOF-PET), interaction depth PET (DOI-PET), single photon emission computed tomography (SPECT), high-energy physical experiments, nuclear medicine imaging, industrial nondestructive inspection, safety detection (such as luggage and cargo container inspection) and the like.

The invention provides a multi-scale round-square nested fractal antenna applied to wings of an unmanned aerial vehicle. The multi-scale round-square nested fractal antenna comprises a substrate, the grounding layer is arranged on the lower surface of the substrate; the feed structure is arranged at one end of the upper surface of the substrate and comprises an input feed line, a micro-strip transmission line and a chip resistor connected with the input end of the feed line and the micro-strip transmission line; the radiation structure is arranged at one end, far away from the feed structure, of the upper surface of the substrate and comprises a radiation patch; the transmission structure is arranged on the upper surface of the substrate, is used for connecting the feed structure and the radiation structure, and comprises an impedance transition transmission line; the microstrip transmission line is of a geometric gradual change type, the radiation patch is of a multi-scale fractal topology formed by nesting circular contours and square contours, the circular contours and the square contours are sequentially arranged in a nesting mode according to preset intervals and form multi-stage self-similar boundaries, the impedance transition transmission line is in a periodical bending shape, and the line widths of all the parts are consistent. The fractal antenna solves the problem that in the prior art, a fractal antenna which is compact in structure, high in radiation efficiency and suitable for wing embedded installation does not exist.

The invention relates to a high-radiation-resistance absolute photoelectric encoder and a position precision compensation method thereof, and the encoder comprises a main sensor which is used for obtaining precise angle data; the auxiliary sensor is used for acquiring rough angle data; the processor is used for calculating an absolute position according to the accurate angle data and the rough angle data, converting the absolute position into an absolute coding signal and outputting the absolute coding signal, and controlling power supply switching according to environmental parameters; the environment parameter detection circuit is used for transmitting the environment parameters detected by the detection device to the processor; the main power supply is used for normally supplying power to the high-radiation-resistance absolute photoelectric encoder; the backup redundant power supply is used for supplying power to the high-radiation-resistance absolute photoelectric encoder when the state of the main power supply is abnormal; and the power supply radiation-resistant seamless switching circuit is used for performing power supply switching according to the switching control signal sent by the processor. The position precision compensation method is integrated in the processor and is used for performing position precision compensation on the main sensor.