31 results about "Corner reflector" patented technology

The application provides a SAR ground calibration corner reflector auxiliary installation device and installation method, which comprises a mounting frame, an azimuth angle adjusting device, an elevation angle adjusting device and a reference assembly. The mounting frame is used for supporting on the ground. A triangular pyramid positioning body is connected with an elevation angle pointer of the elevation angle adjusting device through a telescopic connecting rod, and the azimuth angle adjusting device is used for adjusting the azimuth angle. The elevation angle adjusting device rotates synchronously with the azimuth angle pointer of the azimuth angle adjusting device, and the rotation plane of the elevation angle pointer is perpendicular to the azimuth angle pointer. When the azimuth angle and the elevation angle are adjusted to the position, the bottom edge of the reference surface of the triangular pyramid positioning body is parallel to the flight line, and the reference surface is coincided with a straight line which is perpendicular to the flight line and passes through the calibration point. At this time, the posture of the triangular pyramid positioning body is the same as that of the corner reflector. Since the triangular pyramid positioning body is similar to the corner reflector, the corner reflector only needs to be rotated to the position which is coincided with the triangular pyramid positioning body.

The application discloses a visible light and laser radar aerial survey target, and relates to the field of aerial surveying and mapping, which comprises a transparent box body, a composite corner reflector and an adjustable supporting mechanism. A visible light image control pattern is arranged on the top plate of the transparent box body, and the geometric center of the visible light image control pattern is coaxially locked with the geometric center of the composite corner reflector with multiple symmetrical corner reflection units in the box. Regardless of the change of the ground slope and the angle of the box body, there is no relative displacement, and the systematic registration error caused by the center misalignment due to the two-time layout of the separated target is completely eliminated from the physical structure. The box body is adjusted to be absolutely horizontal through the adjustable supporting mechanism, the visible light image control pattern is guaranteed to be perpendicular to the unmanned aerial vehicle aerial photography optical axis without perspective distortion, the laser signal capture rate is improved through the configuration of the composite corner reflector comprising multiple symmetrical corner reflection units, and the aerial survey precision in mountainous areas is significantly improved.

The present application relates to the technical field of optical axis calibration, and particularly relates to a laser range finder collimation system using a CCD matrix, which comprises a hollow corner reflector, an off-axis parabolic metal reflector, a rotating reflector, a first diagonal beam-splitting reflector, a second diagonal beam-splitting reflector, a laser radiation imaging instrument, a CCD matrix, a computer and an LED emitter. The present application solves the problem of high-precision alignment of the laser emission channel and the laser receiving channel of the laser range finder, and can be applied to the optical axis calibration of most photoelectric devices and lasers, quickly aligns the channels in different spectral ranges, and can use continuous and pulsed lasers for operation. The present application can solve the problem of spatial position coordination of focusing on a single component and the channel axis, and can realize optical axis calibration through the configuration of the hollow corner reflector and the rotating reflector, and can realize optical axis offset visualization and quantification through the cooperation of the laser radiation imaging instrument and the CCD matrix, thereby simplifying the collimation process and improving the precision of the device collimation axis.

This invention relates to the fields of geodesy and radar engineering technology, and discloses a method, apparatus, and electronic equipment for the directional deployment of corner reflectors. The method includes: determining two measurement reference points in the proposed deployment area of ​​the corner reflector and obtaining the geodetic coordinates of the measurement reference points, and then calculating the reference azimuth angle of the baseline between the measurement reference points relative to true north; using the reference azimuth angle as a reference, marking two auxiliary points in the proposed deployment area of ​​the corner reflector and determining the local physical baseline; obtaining the design azimuth angle of the corner reflector and calculating the azimuth angle difference between the design azimuth angle and the reference azimuth angle; and using the local physical baseline as a reference, directionally deploying the corner reflector according to the azimuth angle difference. The method provided by this invention can still stably obtain an absolute physical reference pointing to true north even in extreme electromagnetic environments such as substations and building complexes, realizing high-precision deployment of corner reflectors in areas with strong interference.

The application discloses a kind of based on open-pit mine slope radar's damage mode identification method, based on the displacement of corner reflector measured according to the coordinate change of each corner reflector in three-dimensional coordinate system monitored each time by slope radar, according to the size of displacement, the corner reflector of preliminary screening exists abnormal motion;The corner reflector of preliminary screening is carried out clustering analysis, and the corner reflector of all preliminary screening is split into multiple different by corner reflector Abnormal deformation set formed;Build damage mode identification model, respectively to the spatial displacement change characteristics of all the abnormal deformation set by multiple corner reflectors is trained learning, to identify the corresponding relationship between the spatial displacement change characteristics corresponding to each damage mode and damage mode, to determine the four damage modes corresponding to abnormal deformation set;The application determines the corresponding relationship between the spatial displacement change characteristics of slope and damage mode, so that the damage mode corresponding to different regions can be managed by partition targeting.

This utility model provides a projectile device and a corner reflector launching system, relating to the field of corner reflector launching technology. By installing a slow-descent device and a corner reflector device respectively in a first cavity and a second cavity formed inside the projectile casing, after the launching device launches the projectile casing, when it reaches the designated airspace, the separation rope tightens, causing the projectile casing to stop. Due to the setting of the first connecting rope, the slow-descent device will continue to move forward due to inertia, realizing the separation of the slow-descent device from the projectile casing. After the first connecting rope is tightened, the slow-descent device stops. Due to the setting of the second connecting rope, the corner reflector device will continue to move forward due to inertia until the second connecting rope tightens, thereby realizing the separation of the corner reflector device from the slow-descent device. The gradual separation of the slow-descent device and the corner reflector device can be achieved without the need for mechanical and electrical structures.

The present application relates to the technical field of satellite calibration, and in particular to a SAR satellite absolute radiation calibration method, device, equipment and storage medium, wherein the SAR satellite absolute radiation calibration method comprises: determining a natural distribution target as a calibration field; imaging the calibration field respectively to obtain a calibrated SAR image and a medium-high orbit SAR image; establishing a corresponding relationship between noise power and an incident angle, and removing noise power from the calibrated SAR image and the medium-high orbit SAR image based on the corresponding relationship; performing geometric consistency processing; calculating the backscattering coefficient of the calibration field; and calculating the calibration constant of the medium-high orbit SAR satellite to be calibrated. The above method solves the technical bottleneck of difficulty in arranging a large-size corner reflector outside the field and inability to cover the full field of view of large-width imaging by introducing a calibrated SAR satellite as a radiation reference and combining it with the natural distribution target.

This invention relates to a fusion calibration method for 4D millimeter-wave radar and visible light camera suitable for environmental perception. It uses a triangular radar corner reflector to collect radar point cloud and camera image calibration data at different distances and angles. After preprocessing, 3D-2D corresponding data pairs are constructed, and a region-constrained optimization framework is built. Using a region matching loss function as the error metric, the radar-camera extrinsic parameters, camera intrinsic parameters, and distortion parameters are optimized in stages to obtain a static benchmark calibration parameter set. Temporal synchronous data of different types of environmental features are collected, and supervisory labels are generated through spatiotemporal alignment and frame-by-frame parameter correction to train the calibration network model. The model is deployed to a computing platform, and dynamic calibration parameters are output in real time for parameter updates. This invention significantly improves the accuracy and stability of calibration results, achieving the dual effects of reducing computational power and increasing efficiency while reducing noise and maintaining accuracy, and greatly enhancing the model's generalization ability in real-world complex road scenarios.

This invention relates to the interdisciplinary field of remote sensing monitoring and civil engineering, and particularly to an InSAR algorithm evaluation system and method based on a variable elevation building model. The system includes a variable elevation building model, a multi-source deformation monitoring system, corner reflector components matched with the InSAR displacement monitoring system, and a backend server. The variable elevation building model includes load-bearing columns arranged along its length, the building body, a variable slope roof system, and a lifting system located below the load-bearing columns. The lifting system and the variable slope roof system actively and precisely control the level and pattern of building deformation. The system integrates a space-based and ground-based joint monitoring network composed of laser ranging, tilt, strain, and BeiDou / GNSS sensors from the multi-source deformation monitoring system. Global double-blind verification is achieved using RMSE values ​​and robustness coefficient (RI) algorithms, providing a reliable performance rating benchmark for the InSAR algorithm.

The application discloses an artificial corner reflector for synthetic aperture radar interferometry calibration, and relates to the technical field of measurement and monitoring, and solves the technical problem that an existing corner reflector is not easy to adjust the angle after being fixed, and the technical scheme is as follows: the corner reflector comprises a corner reflecting plate, a vertical angle control device and a horizontal angle control device, the vertical angle control device has a movable part, the movable part of the vertical angle control device is connected with the corner reflecting plate, and is used for controlling the rotation angle of the corner reflecting plate in the vertical direction; the horizontal angle control device has a rotating part, the rotating part of the horizontal angle control device is connected with the vertical angle control device, and is used for controlling the rotation angle of the vertical angle control device in the horizontal direction, so as to control the rotation angle of the corner reflecting plate in the horizontal direction. The application can easily and accurately adjust the angles of the corner reflector in the horizontal and vertical directions, so as to satisfy the incidence of different satellite radar waves.

This utility model discloses a single-pendulum type radar moving target signal simulation device, which includes a base, a support body, a pendulum body, and a corner reflector. The support body is fixedly connected to the base, and the pendulum body is movably connected to the support body. The pendulum body swings on the support body with the connection point as the fulcrum. The corner reflector is fixedly connected to the pendulum body and is used to reflect the radar incident wave to simulate the target signal. The device uses a simple structure to simulate the moving target signal without the need for complex mechanical mechanisms or electronic equipment.

This invention relates to a 4D millimeter-wave radar roll angle calibration system. A roll angle calibration value is configured by placing left and right corner reflectors on the upper and lower sides of an assumed horizontal plane of the millimeter-wave radar, respectively. Then, a host computer triggers a calibration program. Upon receiving a command, a slave computer controls the millimeter-wave radar to send test signals to the left and right corner reflectors, thereby detecting their position information. Based on the position information of the left and right corner reflectors, the roll angle measurement value of the millimeter-wave radar can be further calculated. Finally, the roll angle calibration value and the roll angle measurement value are used to calibrate the roll angle of the millimeter-wave radar. This application demonstrates that the host computer controls the radar to automatically complete the roll angle calibration function and derives a method for calculating the radar roll angle based on the angular position information measured by the radar.

The utility model relates to a square telecentric lens structure with corner, telecentric lens structure including main mirror barrel, extension mirror barrel, corner mirror barrel and reflector gland that connect gradually, main mirror barrel, extension mirror barrel, corner mirror barrel and reflector gland are all square structure, corner mirror barrel and reflector gland between fixed one square corner reflector, corner reflector present 45 degree angle installation fixed, compared with the prior art, the utility model has convenient installation, reduces processing difficulty, convenient fixed auxiliary device and so on advantages.

The application relates to a mounting structure and a precise mounting method of a long-distance laser target tracking and ranging optical path, which are used for high-precision mounting of the laser emission direction of a space target tracking and ranging optical path, the optical path comprising three reflecting mirrors, and the deviation between the laser emission direction reflected by the three reflecting mirrors and the rotation angle of a rotating table during the oscillation of an azimuth axis and a pitch axis is required to be minimized. First, a collimator is used to lead the azimuth axis and the pitch axis to a plane mirror; second, the second reflecting mirror and the first reflecting mirror are mounted and adjusted through the mounting mode of a spacer and a fastening screw, the grinding amount of the spacer is calculated according to the image movement track of the collimator or the laser imaging point movement track in a measuring camera, and the spacer is ground based on the grinding amount, so that the purpose of high-precision mounting is achieved; third, the mounting system of the third reflecting mirror is built through visible light camera zero-point calibration and the measuring camera and an angle reflector, so that the mounting of the third reflecting mirror is realized; and finally, the spacer and the fastening screw are reinforced through epoxy glue, so that the mechanical performance of the optical path is ensured.

The utility model discloses a corner reflecting device with a rotating function. The corner reflecting device comprises a cross beam, corner reflecting plates arranged at the two ends of the cross beam, a base for integrally supporting, a motor driving system arranged in the base, and a rotary supporting mechanism for connecting the cross beam and the base. The corner reflecting plate is formed by vertically welding a rectangular plate, an isosceles triangle plate and two right-angle triangular plates, and is used for reflecting electromagnetic wave signals at multiple angles. The cross beam is of an inner-outer two-stage box structure and is connected through a pin shaft, the telescopic function is achieved, and transportation and storage are convenient. Universal wheels are mounted on the base, so that the moving flexibility of the device is enhanced. The motor driving system and a second rotary support of the rotary supporting mechanism form a gear pair through a gear at the output end, and the cross beam is driven to rotate by 360 degrees. The device is simple in structure, convenient to assemble, disassemble and transfer, has a rotating function, is high in reflecting capacity and large in reflecting area, and can realize continuous reflection of electromagnetic wave signals.

The application discloses a manufacturing method and a MEMS corner reflector array. The application adopts ICP etching method to etch the front and back surfaces of a silicon wafer, realizes a deep cavity with high inner wall perpendicularity, and can form a high-perpendicularity reflecting surface. The application bonds a light-transmitting cover plate to protect the light-transmitting window. Based on the light-transmitting cover plate, self-mask photolithography and stripping can be realized, the composite metal layer is uniformly sputtered to the inner wall of the deep cavity, and the uniform metallization of the perpendicular reflecting surface is ensured. The application has simple process, wafer-level integrated process in the whole flow, and is compatible with CMOS process, and is suitable for mass production.

The present application relates to the technical field of subsidence monitoring device, especially to a multi-sensor mine surface subsidence monitoring device, which comprises a first shell, a first protective cover, a second shell and a first monitoring assembly, the top of the first shell is fixedly provided with two groups of mounting racks, and the top of the mounting rack is fixedly provided with a GNSS receiver, the top of the first shell is provided with an angle reflector through three tripods, and a drain hole is formed in the central position of the bottom of the angle reflector; the side of the first shell is fixedly provided with a first protective cover. The first shell is provided with a first protective cover and a second protective cover around, isolation is realized based on the first protective cover and the second protective cover, animals and plants on the ground can be prevented from extending to the angle reflector along the first shell and the second shell, so that the angle reflector can work normally, and high reflection effect of the synthetic aperture radar signal is realized.

The application relates to a self-destruction control device and method of an inflatable corner reflector, and belongs to the technical field of the inflatable corner reflector. The device comprises a controller, a positioning communication device and a capsule self-destruction module. The controller and the positioning communication device send self-destruction signals to each other. The controller sends self-destruction signals to the capsule self-destruction module installed on the inflatable corner reflector. The positioning communication device also has the function of communicating with a remote control terminal. After the controller or the positioning communication device receives the self-destruction signals, through communication between the two, the positioning communication device erases the data of the positioning communication chip and physically destroys the same. Meanwhile, the controller erases the data of the erasable storage chip and physically destroys the same. Moreover, the controller outputs self-destruction signals to the capsule self-destruction module, so that the capsule of the inflatable corner reflector leaks and sinks into the seabed, thereby avoiding the leakage of special technology and data related to the inflatable corner reflector which cannot be recovered.

The utility model provides a kind of light inter-orbital laser communication terminal of small and light, including optical head and processor module of light connection;Optical head includes first plane mirror, main telescope, second plane mirror, fast mirror, dichroic mirror, first narrowband filter, beam splitter, beam receiving collimator, second narrowband filter, tracking collimating camera, signal light emission collimator, pre collimating mirror, shutter and corner reflector;Processor module includes power module, integrated communication module and optical amplifier module in turn stacked in sequence.The utility model reduces the quality of whole machine by reasonable layout;The key components of optical machine main body are all used composite material with high specific stiffness, while reducing quality, ensure force thermal stability;Integrated processor design is carried out, integrated communication module, optical amplifier and secondary power supply are designed as a whole, reduce metal shielding material, reduce processor weight on the basis of ensuring radiation resistance performance.

The application discloses a kind of multi-sensor online external parameter calibration device construction and calibration method, comprising the following steps: a plurality of internal surface is coated with different nature coating corner reflector is arranged combination, constructs calibration device;Based on the calibration device, the internal vertex point set of corner reflector is obtained using multi-sensor respectively;The internal vertex point set of corner reflector obtained by each sensor is matched two by two, and the external parameter parameter between multi-sensor two by two is obtained;The external parameter parameter is screened, and the optimal external parameter parameter is obtained, and external parameter calibration is realized based on the optimal external parameter parameter.The application can provide the feature point needed in the external parameter calibration of four common sensors of laser radar, millimeter wave radar, camera, infrared camera, contour feature with high precision, can satisfy two by two registration between four types of sensors, and realize external parameter calibration.

The present application relates to the field of optical engineering, free space optical communication and unmanned aerial vehicle load technology, and particularly relates to an airborne reverse modulation optical communication system based on a driving micromirror and an adjustable three-mirror, namely, a reverse modulation free space optical communication system with an adjustable hinged three-angle reflector as a core reverse retroreflector component of an unmanned aerial vehicle end and working with a modulation unit. The communication system comprises a ground station and an unmanned aerial vehicle platform, the ground station is used for transmitting an inquiry signal light and receiving a back transmission light signal, and the unmanned aerial vehicle platform is used for receiving the inquiry signal light transmitted by the ground station and realizing reverse retroreflection and controlled adjustment through the three-angle reflector component arranged thereon.

The application discloses a kind of slope settlement monitoring method and system based on multi-angle reflector, it is related to slope settlement monitoring technical field, including the following steps: forming monitoring networking;Obtain the reference data of current LOS corresponding to robust angle reflector and the to-be-corrected data of current LOS corresponding to unstable angle reflector;Obtain the basic data of current LOS corresponding to robust angle reflector;Get the basic data of current LOS of each robust angle reflector;With current LOS basic data and current LOS fitting data as global constraint reference, the original InSAR deformation data of each natural scattering point is corrected, and the slope full-field settlement deformation field is solved;The slope settlement monitoring method based on multi-angle reflector of the application solves the technical problems that traditional fixed reference cannot dynamically adapt to the real-time deformation state of slope, leading to reference failure and low monitoring data reliability.

This application discloses a coordinate measurement compensation method, device, medium, and equipment for a solid corner reflector, relating to the field of large-size precision engineering measurement technology. The method includes: acquiring the coordinates of the measurement optical center of the solid corner reflector using a laser tracker; calculating the three-dimensional attitude parameters of the solid corner reflector based on the measurement optical center coordinates and calibration parameters, including the coordinate system rotation transformation matrix and the physical depth from the incident surface of the solid corner reflector to its vertex; calculating the refractive geometric parameters of the laser incident on the solid corner reflector based on the three-dimensional attitude parameters and the direction of the incident laser beam; constructing a complete optical path propagation model based on the refractive geometric parameters, and calculating the propagation optical path and lateral displacement of the laser inside the solid corner reflector; and compensating the measurement optical center coordinates of the solid corner reflector based on the propagation optical path and lateral displacement to obtain the compensated physical geometric vertex coordinates. This application can improve the coordinate measurement accuracy of solid corner reflectors.

This utility model provides a corner reflector launching system, relating to the field of corner reflector launching technology. The corner reflector launching system provided by this utility model places the projectile component in the launching chamber and uses the driving force generated by the driving component to push the projectile component to launch, so that the projectile component flies in the air. At this time, the first connecting rope is in a slack state. When the first connecting rope is taut, the projectile component stops in the air, thereby relying on the inertial descent component and the corner reflector component to separate from the projectile component, realizing the separation operation. This alleviates the technical problem of the complex separation structure used by the existing corner reflector device to detach from the projectile.

The application discloses a corner reflector-based slope radar precision correction monitoring system and method, which comprises constructing an initial map between a corner reflector and a radar scanning angle, and constructing an initial slope state map between a displacement amount / strain rate of each monitoring point of a monitored area and the radar scanning angle; when the slope radar is in a precision correction mode, the slope radar sequentially acquires each corner reflector monitored based on a set rotation angle and forms a corner reflector real-time map, and determines a displacement deviation existing in the slope radar itself based on a position difference between the initial map and the corner reflector real-time map; when the slope radar is in a dynamic monitoring mode, a real-time slope state map of the monitored area is formed, a real-time slope state map after angle compensation is regenerated, and the real-time slope state map after compensation correction is compared with the initial slope state map point by point to determine the change of the monitored slope; and the application improves the monitoring precision of a mine pit slope.

The application discloses an icosahedral corner reflector ASC forward modeling method, device and product, relates to the field of radio detection, and is used for realizing efficient and accurate characterization of electromagnetic scattering characteristics of a complex calibration body under sparse angles or a dynamic environment. The application automatically peels off and reconstructs a physical scattering component with clear physical meaning from unordered three-dimensional discrete digital grid data, solves a basic scattering response under high-frequency approximation in real time, fuses accurate geometric phase center calculation and an environment perception correction model, quantifies disturbance introduced by a dynamic environment, and finally solves an ASC parameter set in a forward direction. The parameter set generated in real time by the application can reproduce phase interference fringes of the icosahedral corner reflector under a dynamic viewing angle and RCS attenuation characteristics caused by non-ideal structural deformation with high fidelity, and provides parameterized model support conforming to electromagnetic physical laws for radar system calibration and SAR image simulation.

A corner reflector with modulation arrangement is disclosed. According to one aspect, a corner reflector having three panels includes a plurality of planar antenna elements configured on each panel to receive, modulate and reflect an incident electromagnetic wave. The corner reflector also includes biasing circuitry configured to provide a common bias voltage to each of at least a subset of the plurality of planar antenna elements. The corner reflector further includes at least one diode at each planar antenna element, each diode having a common bias voltage and configurable to be one of forward-biased and reverse-biased according to the common bias voltage.

The application provides a laser attitude measurement and identification method with reflector layout optimization, comprising the following steps: installing multiple L-shaped laser corner reflectors, obtaining the measurement distance difference of the multiple laser corner reflectors based on satellite laser ranging, taking the spacing ratio of the multiple laser corner reflectors arranged in a same line as an identity code, defining and calculating the discriminant of the measurement distance difference in sequence, taking the invariant of the discriminant as the matched identity code, determining the target identity and the reflection sequence, determining the one-to-one correspondence between the ranging data and the laser corner reflectors according to the reflection sequence, respectively calculating the included angle between the two baselines and the measurement direction vector, and then combining the coordinates of the station and the target carrier to perform attitude calculation and obtain the attitude of the target carrier. The application realizes the rapid identification of the satellite and the real-time measurement of the complete attitude by the special arrangement of the laser corner reflectors and the satellite laser ranging data.

The application provides a high-pressure water-filled branch unfolding type underwater acoustic combined angle reflector structure and belongs to the technical field of underwater target acoustic characteristics. The application solves the problem that the existing inflatable skeleton angle reflector needs to be equipped with a counterweight to cause inconvenience in use. Six joints of a six-way joint are respectively connected with six high-pressure water belts, four of which are connected with sealed heads at the other ends, one of which is connected with a switch valve at the other end, and the last one is connected with a check valve at the other end. After the six high-pressure water belts are filled with water, six column structures are formed. Each two adjacent columns are perpendicular to each other, and a fastening edge rope is connected with the top ends of each two columns to form an isosceles right triangle, two columns are right angle sides, the fastening edge rope is a hypotenuse, and a sound reflecting cloth is fixed in the isosceles right triangle to form a reflecting surface of the angle reflector. The high-pressure water belt adopted in the application can be folded or wound, has a small volume after being stored, and has a light overall structure weight, so that the application is convenient to transport and store.