152 results about "Angular scan" patented technology

The invention discloses a sparse finite angle CBCT reconstruction method and system based on residual diffusion and a storage medium, and the method comprises the steps: carrying out the CBCT sparse finite angle scanning of a to-be-detected target, and obtaining sparse projection data; fDK reconstruction is carried out on the sparse projection data to obtain an initial CBCT image; generating a first optimized CBCT image from the initial CBCT image through an image pre-training network; through the first optimized CBCT image and the sparse projection data, using the trained residual diffusion model to determine a residual image of the to-be-detected target; summing the first optimized CBCT image of the to-be-detected target and the residual image of the to-be-detected target to obtain a second optimized CBCT image of the to-be-detected target, and the second optimized CBCT image is a final CBCT reconstruction image. According to the method, the problems of stripe artifacts and low-contrast tissue annihilation under limited angle scanning are solved, the large-view CBCT reconstruction resolution is improved, and the radiation dose is reduced.

The invention provides a multi-target automatic tracking method and system based on an unmanned intelligent turntable. According to the method, electromagnetic echoes and environment depth data are synchronously collected through a detector, and an observation data set is constructed; separating thermal radiation, surface texture and motion features, establishing a four-dimensional feature space containing space-time coordinates, and identifying a shielding area; dynamically adjusting signal parameters to enhance the characteristics of the shielding area and feeding back an optimization record; calculating an optimal scanning path based on the parameter optimization value, and driving the sensor array to perform multi-angle scanning to generate a weighted data set; in combination with historical trajectory data, a trajectory prediction model is optimized in parallel through distributed calculation, turntable parameter synchronization and decision making are coordinated, and finally efficient reconstruction of a multi-target continuous trajectory in a shielded environment is realized. According to the technical scheme provided by the invention, through multi-dimensional feature fusion and dynamic parameter optimization, reconstruction of a multi-target trajectory in a shielding environment is realized, and the environmental adaptability and tracking efficiency of an unmanned system are improved.

The invention discloses a double-domain artifact correction method based on multi-energy-level data and physical prior fusion, and the method achieves the efficient and precise removal of dispersive metal artifacts through the construction of a complete technical scheme of the combination of multi-energy-level data collection, double-domain cooperative correction and physical model constraint. The system has the beneficial effects that the system covers multiple fields of medical treatment, industry, security and protection, aerospace and the like, and has extremely high universality and adaptability. On the basis of a multi-energy-level slow switching scanning protocol, full-angle scanning of at least two energy levels is completed by dynamically adjusting radiation source parameters, and obtained complete multi-energy-level projection data is converted into a high-dimensional tensor through a channel dimension splicing image fusion method. The constructed multi-channel virtual image completely retains attenuation characteristics and structure information of a target object under each energy, provides a more comprehensive input source with discrimination for a deep learning network, builds a data basis for accurate correction in different fields fundamentally, and adapts to various imaging scenes containing metal targets.

The invention belongs to the field of CT (Computed Tomography) tomography reconstruction technology and artificial intelligence, and discloses a finite angle CT reconstruction method based on combination of a three-dimensional conditional diffusion model and synchronous iteration. The CT is an imaging technology which utilizes X-rays to irradiate a target from different angles and acquire projection, and obtains an internal three-dimensional structure through reconstruction. Different from traditional CT depending on nearly full-angle scanning, the method only collects limited-angle projection, and achieves fault reconstruction under the limited-angle condition through a three-dimensional condition diffusion model of space domain-frequency domain two-way decoding and by means of structural generality priori of a workpiece. Meanwhile, projection and fault data consistency correction is carried out in combination with a synchronous iteration reconstruction technology, the advantages of an iteration method in the aspect of physical mechanism characterization are exerted, interpretable physical constraints are provided for a deep learning network, and therefore the reliability and precision of a reconstruction result are improved.

The invention discloses a power distribution station multi-point environment control system and method, and relates to the technical field of power system automation, and the method comprises the following steps: building a time-frequency phase-locked observation baseline based on the scattering relation between an infrared band and water vapor under the condition of sudden humidity increase, inverting aerosol particle size distribution and concentration distribution, and generating a multi-dimensional scattering phase residual field; according to the multi-dimensional scattering phase residual field, a real radiation field is reconstructed by adopting multi-path reverse ray variation solution and combining polarization dual-angle scanning, and a reflection saturation risk spectrum is generated. According to the method, a real radiation field is reconstructed through multi-dimensional observation and inversion, a consistency graph is generated by fusing multi-source data, a misjudgment boundary is accurately identified, a control margin and a switching condition are constructed based on residual playback and time correction, and a steady-state closed-loop control chain is formed in combination with a dynamic regulation and control mechanism. The self-adaptive precise regulation and control of the power distribution station environment and the stability guarantee of the thermal field are realized.

The invention relates to the technical field of dual circularly polarized antennas, and discloses a dual circularly polarized antenna, a sub-array, a one-dimensional phased array and a planar phased array. The antenna comprises a direct dual-circularly-polarized radiation structure layer, a circularly-polarized electromagnetic metasurface coupling layer and a circularly-polarized electromagnetic metasurface parasitic layer which are sequentially stacked from bottom to top. The broadband wide-angle scanning dual-circularly polarized phased array provided by the invention has the advantages of low cost, low profile, high radiation efficiency, broadband, dual-circularly polarized wide-angle beam scanning and the like, and is suitable for advanced satellite internet communication and navigation application.

The present invention provides a computer-implemented method for X-ray analysis. The method includes receiving X-ray analysis data from an X-ray detector having multiple detection channels. The X-ray analysis data includes angular scan intensity data obtained by measuring X-ray intensities when successively scanning the X-ray detector. A series of intensity measurement values ​​is acquired for each detection channel. Each series of intensity measurement values ​​is an intensity angular scan. An angular offset is determined for each detection channel. The method further includes determining, for each of a plurality of detection angle bins, an intensity contribution factor for at least one of the intensity measurements. The intensity contribution factor is determined according to an angle range associated with the detection angle bin and the angular offset of the detection channel. For each of the plurality of detection angle bins, a binned intensity is determined based on the intensity of the at least one intensity measurement value and its corresponding intensity contribution factor.

The invention discloses a PVC film coating uniformity detection method based on spectral analysis, and relates to the technical field of optical detection, and the method comprises the following steps: S001, adopting a controllable incident illumination system with a multi-angle rotation function to carry out continuous angle scanning on the surface of a PVC film, collecting reflection spectrum intensity data in a corresponding wave band range according to different incident angles, and generating a spectrum data matrix containing interference characteristics; and S002, carrying out continuous wavelet transform processing on the spectral data matrix, carrying out multi-scale local decomposition on a spectral response signal, extracting and separating a periodic interference characteristic signal, and obtaining a purified spectral matrix after interference reduction. According to the method, through multi-angle spectrum collection and interference feature stripping, accurate identification of a coating thickness abnormal area and combination of strength indexes, spraying parameters are regulated and controlled, a detection-compensation-reinspection closed-loop mechanism is constructed, interference misjudgment is effectively avoided, and the accuracy and regulation and control efficiency of uniformity detection of the PVC film coating are improved.

The invention discloses a defect local resonant frequency extraction method based on vibration response space clustering analysis, and belongs to the field of nondestructive testing. The method comprises the following steps: processing an ultrasonic detection data set, calculating a difference function between a frequency spectrum of each scanning point and an average frequency spectrum, extracting a local maximum frequency, carrying out frequency statistics, and screening out an abnormal response frequency; in combination with the spatial distribution characteristics of the detection points, identifying a frequency cluster with spatial aggregation by adopting a density clustering algorithm to form a candidate local resonant frequency set; and constructing an intensity matrix under the candidate local resonant frequency, extracting energy attenuation characteristics in each direction by using an equal-angle scanning method, and comparing the energy attenuation characteristics with a preset threshold value to determine the defect local resonant frequency. The method does not need to preset defect positions and geometric features, can realize automatic extraction of the defect local resonant frequency under the condition of unknown defects, has the advantages of high identification precision, strong anti-interference capability, high calculation efficiency and the like, and is suitable for non-destructive testing requirements in an engineering environment.

The invention discloses an engineering pile hole-forming quality detection method based on an intelligent interconnection foundation platform, and relates to the technical field of engineering pile quality detection, and the method comprises the steps of S1, task issuing and data docking, S2, probe deployment and mud sound velocity calibration, S3, ultrasonic hole wall scanning, S4, sediment thickness measurement, S5, real-time data processing and twinborn feedback, and S6, quality evaluation and decision making. A plurality of groups of transducers are used for scanning a hole wall section at double angles through an orthogonal cross transducer array, millimeter-level distance measurement is realized through an ultrasonic total reflection principle, measurement errors caused by stretching and winding of a traditional measuring rope are avoided, a sediment interface is verified through pressure sudden change points and probe dip angle probe-dip angle coupling measurement, and the measurement accuracy is improved. The problem that a traditional measuring rope is touched by soft mud by mistake is solved, lowered design pile position information is automatically received, the method is suitable for complex stratums such as a pebble bed and a quicksand bed, a visual report and a hole forming model are generated, the recording efficiency is improved, and the hole collapse risk is reduced.

The invention discloses a millimeter wave circularly polarized wide-angle scanning antenna based on inclined axial ratio wave beams. The antenna comprises a dielectric substrate and a plurality of completely identical antenna units with inclined axial ratio wave beams, wherein the antenna units are linearly arranged on the dielectric substrate; the antenna unit comprises a metal radiation patch, a metal floor, a first feed probe and a second feed probe; the metal radiation patch is printed on the upper surface of the dielectric substrate, and the metal floor is arranged on the lower surface; the metal radiation patch is composed of a circular metal radiation patch and a circular ring metal radiation patch; a notch annular gap is formed in the circular metal radiation patch, and two pairs of rectangular gaps are formed in the periphery of the circular metal radiation patch; two pairs of rectangular gaps and a rectangular branch knot are arranged on the circular ring metal radiation patch; the feed probe passes through the dielectric substrate and is respectively connected with the circular metal radiation patch and the circular ring metal radiation patch, and a signal excites the metal radiation patches for radiation in a coaxial line feed mode. The invention has the advantages of wide-angle scanning, low profile, simple structure and the like.

The invention discloses an ultrahigh-scanning-rate leaky-wave antenna based on double-layer offset quasi-complementary SSPP. The antenna comprises a dielectric substrate, double-layer single-side offset quasi-complementary SSPP structures on the upper surface and the lower surface of the dielectric substrate, a double-layer mode conversion structure and a dielectric substrate top layer periodic modulation branch knot. Wherein the longitudinal symmetry axis of the dielectric substrate top layer single-side strip SSPP unit and the longitudinal symmetry axis of the dielectric substrate bottom layer single-side slot SSPP unit are relatively offset, and a double-layer single-side offset quasi-complementary SSPP unit is jointly formed; the double-layer mode conversion structure is composed of a trapezoidal gradual change structure on the top layer of the dielectric substrate and a periodic gradual change slotting structure on the bottom layer of the dielectric substrate; and the dielectric substrate top layer periodic modulation branch knot is formed by compounding a rectangular structure and a semicircular structure loaded at the tail end of the rectangular structure, and is positioned on the opposite side of the top layer single-side strip SSPP structure. The wide-angle scanning ultra-narrow band-pass filter has the advantages of wide-angle scanning, ultra-narrow working bandwidth, ultra-high beam scanning rate and open stop-band suppression, and has very high practical potential in the fields of radar, imaging and the like.

The invention belongs to the marine electromagnetic exploration technology, and relates to a deep-sea hydrothermal sulfide anisotropy detection system and method, and the system comprises a transmitting system which comprises an X-axis coil whose normal direction is located at an X axis, a Y-axis coil whose normal direction is located at a Y axis, and a Z-axis coil whose normal direction is located at a Z axis, and forms an orthogonal structure; the three-component synchronous receiving system comprises a three-axis receiving coil located in a seabed hole, and the three-axis receiving coil continuously collects the magnetic field intensity, the polarization direction and the three-dimensional space coordinates at each receiving node; the three-axis synchronous control system adopts a multi-frequency orthogonal current signal with a phase difference of 90 degrees; and the processor is used for performing spectral analysis on the signal received by the three-component synchronous receiving system, calculating an anisotropic response ratio in each polarization direction in a horizontal plane according to the complex amplitude response, and determining a superior principal axis direction of conductivity anisotropy according to the anisotropic response ratio. According to the invention, full-angle scanning excitation is realized, and the detection capability of the anisotropic structure of the hydrothermal sulfide is remarkably improved.

The invention provides a dual-polarization wide-angle scanning planar tight coupling array antenna which comprises a plurality of antenna units which are periodically arranged and are composed of metasurface wide-angle impedance matching layers, metal radiators and metal floors. The wide-angle impedance matching layer is composed of two metasurfaces which are stacked up and down and respectively comprise a plurality of metal rings arranged periodically and square metal patches with gradually changing sizes. The wide-angle impedance matching layer of the metasurface can improve the influence of instability caused by rapid change of antenna impedance on a scanning angle, is beneficial for realizing impedance matching in a broadband, and has a relatively wide-angle-domain beam scanning capability; and the radiating body made of the metal material can eliminate bandwidth deterioration caused by common-mode resonance generated by the antenna in a frequency band range, so that the structure of the antenna is effectively simplified on the premise of ensuring the ultra-wideband characteristic.

The invention discloses a three-coordinate measuring machine based on special-shaped surface measurement. An upper working surface where a working table is located is used for bearing a to-be-measured piece; the measuring mechanism is arranged on the moving portal frame, the moving portal frame is made to move on the workbench, and a to-be-measured piece is measured through the measuring mechanism. A measuring head of the measuring mechanism is arranged at the front end portion where the first movement assembly is located, meanwhile, a first air bag pushing piece is arranged at the rear end portion where the first movement assembly is located, and the first air bag pushing piece is inflated and deflated to be matched with a measuring head piece at the front end portion to synchronously achieve axial pivoting movement. And the second movement assembly is located above the first movement assembly, so that the pivoting movement of the first movement assembly and the second movement assembly drives the measuring head piece to move in the whole space direction, and the full-angle scanning measurement of the to-be-measured piece by the measuring head piece is formed. The whole device can realize high-precision measurement of small-size measurement pieces, and the measurement efficiency is improved.

The invention discloses an industrial part surface defect intelligent detection system and method, and relates to the technical field of defect detection. When a part is fixed on a rotating carrier for full-angle scanning, a surrounding type industrial camera and a light source array cooperate, a light field is dynamically evaluated by combining part curved surface reflection characteristics, and the light source intensity and direction and camera exposure and gain are adjusted; obtaining a uniform initial image; a global image of the part is reconstructed through brightness standardization, denoising interference suppression, multi-scale texture enhancement, distortion correction, normal expansion and cross-view alignment splicing; the method comprises the following steps: extracting cross-scale features by adopting a graph convolution attention model, constructing a fusion feature vector based on geometric morphology parameters and texture features by virtue of defect regions segmented by regional reconstruction aggregation curved surface reflection to finish classification and grading, generating a simulated graph through an adversarial generative network, comparing and verifying, and outputting a detection report. The defect detection precision and efficiency are effectively improved, and the industrial high-quality detection requirement is met.

The invention discloses an image correction model training method and device, equipment and a storage medium, and the method comprises the steps: obtaining a first scanning image, and carrying out the generation of the first scanning image without a corresponding scanning sine image, and obtaining a plurality of scanning sine images in one-to-one correspondence; performing back projection on the scanning sine image, performing summation to obtain a sparse angle scanning image, and comparing the sparse angle scanning image with the full-angle scanning image to obtain a back projection tensor error and a discrete sampling error; constructing an initial network model containing a common convolution module and a traditional linear difference module, and correcting the two modules according to an error to obtain an intermediate network model; and inputting the sine scanning image into the intermediate model to obtain a corrected scanning image, calculating a structural similarity index loss value of the corrected scanning image and the first scanning image, and correcting the intermediate model according to the loss value to obtain a target network model. Projection tensor error and discrete sampling problems in a sparse view angle scanning image can be solved, the precision and detail retention capability of a reconstructed image are improved, and the adaptability of a model to sparse sampling is enhanced.

The present application relates to the technical field of ultrasonic nondestructive testing and industrial pipeline safety evaluation, in particular to a kind of stainless steel pipeline weld internal defect detection system, comprising: obtaining ultrasonic multi-angle scanning data, extracting waveform features and sound path information;Anisotropic propagation model is constructed, and sound beam deflection correction factor is solved;Generate corrected sound field spatial distribution data;Calculate the multi-view spatial coherence coefficient representing the consistency of signal phase under different sound beam paths;If the multi-view spatial coherence coefficient is greater than the coherence threshold, then determine that the corresponding signal is a defect echo, and reconstruct the defect spatial morphology;Otherwise, it is determined that the corresponding signal is structural scattering noise, and noise suppression processing is performed;Output the quality detection report of target component;The present application solves the missed detection hidden danger caused by geometric constraint and material attenuation, and ensures that the detection result of nuclear power and petrochemical high-risk pipeline under complex physical conditions meets the stringent full-coverage quality standard.

The invention provides a one-dimensional wide-angle scanning phased-array antenna based on a multimode substrate integrated waveguide. The one-dimensional wide-angle scanning phased-array antenna comprises a plurality of antenna units, a rectangular SIW cavity structure formed by a plurality of first metalized via holes connected with the metal bottom plate is arranged at the position, close to the periphery, of each antenna unit radiation patch; and two symmetrical rectangular radiation slots, a rectangular mode fusion groove and two rows of second metalized via holes are etched in the SIW cavity on the radiation patch. According to the SIW cavity structure, the defect of relatively high transmission loss caused by easy leakage of a fringe field in the prior art is avoided, and the scanning range of a wave beam is effectively widened; the rectangular mode fusion groove and the two rows of second metalized via holes change the current path when the antenna works, realize effective fusion of TE10 and TE30 resonant modes, effectively widen the working bandwidth of the antenna and the 3dB beam width of a radiation pattern, and are used for solving the problems of narrow working bandwidth and small beam scanning range in the prior art.

The invention provides a high strabismus imaging method and system for cooperative scanning of an agile attitude and a load. The method comprises the following steps: calculating optimal imaging parameters of a high strabismus mode; establishing a load high-squint stripe imaging method under satellite level flight and left and right side-looking attitudes; establishing an SAR imaging coordinate system in a posture and load cooperative scanning state; establishing an attitude agile maneuvering and load electric scanning coordinated slip aggregation mode implementation method; and establishing an azimuth large squint multi-target mode observation mode. According to the invention, the agile maneuvering capability of the satellite platform and the large-angle scanning capability of the load phased-array antenna are fully utilized, and the agile maneuvering capability of the satellite platform and the large-angle scanning capability of the load phased-array antenna cooperate to realize in-orbit large-squint imaging, so that the method has popularization and practical values for improving the in-orbit application efficiency of light and small

The invention relates to the technical field of visual inspection, and discloses a vagina electrode three-dimensional curved surface defect detection system and method based on machine vision, and the vagina electrode three-dimensional curved surface defect detection system comprises a base station and a controller installed on the base station. When the visual detector detects the end of the electrode, the ejector rod moves upwards to drive the connecting frame to move, the protrusion at the tail end of the connecting frame slides along the strip-shaped groove of the rocker arm, the rocker arm is pushed to rotate, the angle of the visual detector is adjusted, the design can adapt to the radian difference between the curved surface of the end and the rod body, and the end detection blind area caused by angle fixation is avoided; tiny defects at the end part of the electrode can be accurately captured, and the requirement of medical equipment on the whole surface integrity of the electrode is met; and in a system resetting stage after the end detection is completed, the visual detector does not recover to the initial detection angle and forms a differentiated visual angle with the angle when the rod body is initially detected, and through secondary differentiated angle scanning in the resetting process, the missing detection defect caused by shadow shielding and a curved surface reflection blind area at the initial angle can be effectively captured.

The invention relates to a simulation scanning method for guiding the routing angle of adjacent layers, and the method comprises the steps: building a transmission line model containing two pairs of differential lines with the vertical projections of the adjacent layers coinciding, setting a center coordinate, controlling the two pairs of differential lines to rotate reversely at the same value, scanning the angle, obtaining crosstalk data of different angles through simulation, and improving the amplitude. Therefore, the wiring angle design of adjacent layers is guided. According to the method, two pairs of differential lines of adjacent layers are set as reverse same-value rotation variables, the angle difference and a single variable are associated, control is simplified, and traceability is achieved; a projection center is used as a rotation reference, so that accurate control and reliable simulation are guaranteed; crosstalk data are obtained through angle scanning, quantization limitation is broken through, and efficiency is improved; the data shows that the difference is improved, the optimal angle is selected by combining the assistance with the space limitation, crosstalk exceeding or space waste is avoided, and experience dependence is got rid of.

Systems and methods for calibrating a radar sensor based upon synthetic aperture radar (SAR) principles are described herein. A relative motion is induced between a radar sensor and a calibration target in the field-of-view of the radar sensor. The radar sensor receives returns from the calibration target. The radar sensor outputs, based upon the relative motion between the radar sensor and the calibration target, detections that are indicative of locations of points on the calibration target. A computing system generates calibration data based upon the detections, the calibration data comprising a correction factor between a position measured by the radar sensor and a corresponding true position of an object. The computing system programs the radar sensor based on the calibration data such that subsequent to being programmed, the radar sensor outputs detections based upon radar returns and the calibration data.

The invention discloses a laminated scanning imaging system and an imaging algorithm based on inclined illumination multi-angle rotation fusion, and relates to the technical field of computational optical imaging. A sample is obliquely illuminated and scanned through a coherent light source, and a series of diffraction information of the sample to be detected in the illumination direction is obtained; and then rotating the angle of the sample to change the illumination direction, repeating the steps to obtain a series of diffraction information at multiple angles, and based on the diffraction information at multiple angles, performing reconstruction through an iterative algorithm to obtain a complex amplitude image of the to-be-detected sample. According to the invention, by means of inclined illumination and sample rotation, multi-angle diffraction information of the sample to be measured is fused in an algorithm, and a high-resolution reconstruction result is obtained. Meanwhile, the technology does not require height superposition of scanning positions at different angles, and has very strong experimental feasibility.

The present invention discloses a method for determining a drivable area based on millimeter-wave radar and related equipment. The method includes: obtaining obstacle point cloud information based on millimeter-wave radar scanning data, wherein the millimeter-wave scanning data includes periodic scanning data, uniform scanning data, and angle scanning data; performing aggregation processing based on the obstacle point cloud information to obtain aggregated point cloud information; determining obstacle associated point information based on the aggregated point cloud information and the kernel density estimation method; extracting target road information based on the obstacle associated point information; and determining a drivable area based on the target road information. The method provided in the embodiment of the present application is aimed at millimeter-wave radars that can realize partial scanning and tracking functions, and realizes tracking and scanning of environmental scenes in low-speed specific environmental scenarios, and realizes demarcation of drivable areas with the assistance of millimeter-wave radars in specific scenarios, so that subsequent vehicles can be planned to the drivable area for vehicle control.

The application provides a dual-polarized planar tightly coupled array antenna, wherein the antenna unit comprises a metasurface matching layer, a radiator and a metal floor, the upper surface of a radiation plate in the radiator is provided with a cross-shaped boss fixed with the metasurface matching layer, and the metal floor is fixed with a metal wall composed of two cross metal plates, the upper end of the metal wall penetrates through the radiation plate and is connected with the metasurface matching layer, and the antenna works through exciting the connecting slot gap formed between adjacent radiators. The gap formed by the cross-shaped boss and the upper end of the metal wall can be equivalent to a capacitive load to offset the inductance generated at low frequency, the metal wall can break the original loop mode resonance, the radiation plate avoids the introduction of common mode resonance, the bandwidth at low frequency is widened, meanwhile, the metasurface matching layer can transform the impedance between the radiator and the free space, the impedance stability during wide-angle scanning of the antenna is improved, and the structure is simplified.

The invention discloses an angle locator for ablation biopsy needle puncture under CT guidance, which belongs to the technical field of ablation biopsy needle angle locators. During the movement, the main gear at the outer end of the rotating rod drives the slave gear one and the slave gear two to be linked, and drives the positive screw and the reverse screw to rotate. During the rotation, the positive screw and the reverse screw push the abutment pad to extend outward for fixation, so as to realize the function of fixation during the movement and the function of double linkage. The abutment pad can also be moved outward and inward by manual rotation. The internal angle scanning part and the angle identification groove are used in combination to realize the measurement of the rotation angle of the biopsy needle angle adjustment part during the rotation, so as to improve the rotation accuracy and quickly focus. The alignment laser is used in combination with the biopsy needle placement groove, and the alignment laser is connected with the focusing points of the fixed laser and the rotating laser accordingly, so as to realize the function of the biopsy needle being able to be adjusted separately.

The application discloses a nonlinear calibration method and device of a magnetic encoder. The method comprises the following steps: setting multiple inflection points on an angle curve diagram formed based on an angle scanning result to divide an angle period into multiple angle curve segments, wherein each angle curve segment is approximately a first-order curve; acquiring a compensation coefficient of each angle curve segment; acquiring an angle output threshold value of each angle curve segment; and starting calibration after detecting a data valid signal, acquiring a target output angle after calibration based on the corresponding compensation coefficient and the angle output threshold value according to an input angle. The application divides a complete angle period into multiple angle curve segments by setting multiple inflection points, and each angle curve segment is approximately a first-order curve. Then, the slope of each angle curve segment is approximated to 1 through a compensation coefficient, and a target output angle compatible with an angle measurement value of an angle measuring instrument is obtained after calibration. The compensation algorithm is simplified, and resource consumption is reduced.

A method for testing an airflow field in a take-off and landing related area of a shipboard aircraft is characterized in that two Doppler coherent laser wind measurement radars are respectively carried on decks on two sides of a ship tail to measure ship wake flow and wind field information of a take-off and landing area, and the method comprises the following steps: S1, measurement of a glide path: at least one radar continuously scans a glide path area of the ship tail, and radial wind speed detection of the glide path is carried out; s2, measurement of deck wind: rotating the Doppler coherent laser wind measurement radar to a specified angle to scan an interested deck area, and adopting a PPI scanning mode; one Doppler coherent laser wind measurement radar adopts a PPI scanning mode to scan a 360-degree range to obtain the wind field condition of the height of the deck around the whole ship, and the other Doppler coherent laser wind measurement radar adopts a DBS-5 scanning mode to obtain the wind field information of the zenith angle above the deck to reconstruct a three-dimensional wind field model around the ship. According to the invention, high-precision and real-time three-dimensional measurement is carried out on the ocean wind field and wake flow around the ship, and a shipboard aircraft can be guided to take off and land in a real sense.

The present disclosure describes a system and a method for an ion implantation (IMP) process. The system includes an ion implanter configured to scan an ion beam over a target for a range of angles, a tilting mechanism configured to support and tilt the target, an ion-collecting device configured to collect a distribution and a number of ejected ions from the ion beam scan over the target, and a control unit configured to adjust a tilt angle based on a correction angle determined based on the distribution and number of ejected ions.