1967 results about "Deflection angle" patented technology

The invention discloses a control method and a control system for magnetic steel polishing, and relates to the technical field of polishing control, and the control method comprises the following steps: setting a magnetic steel positioning center coordinate and a polishing reference point, and configuring a polishing control path; a preset fixed position and a preset fixed posture are collected, and initial polishing process parameters are set in combination with the polishing control path; setting a magnetic steel polishing virtual environment, collecting pressure distribution simulation data of a polishing contact surface, dynamically correcting the feeding speed and the axial deflection angle of a polishing head, establishing a nonlinear mapping model, and adaptively adjusting the polishing power; and a laser contour scanning plug-in is arranged at the tail end of the polishing path, the simulated curved surface and the actually-measured point cloud data are compared for simulation compensation, and a polishing process parameter set is output to execute batch machining control. The technical problems that in the prior art, the grinding precision is not high, and technological parameters are not flexible to adjust are solved, and the technical effects of improving the grinding precision and achieving intelligent optimization of the technological parameters are achieved.

The invention relates to the field of cableway transportation safety control, in particular to a cableway lift carriage operation deflection attitude monitoring device and a control method, and the method comprises the steps: collecting the position, speed, attitude angle and local micro deflection disturbance information of a lift carriage in real time by constructing a multi-mode sensing network; the frequency of the sensor is dynamically adjusted by adopting an adaptive sampling mechanism, and space-time alignment and fusion of heterogeneous data are completed in combination with dynamic time warping and minimum mean square estimation; strengthening the key disturbance dimension based on a disturbance-driven attention mechanism, and predicting a future deflection angle sequence; a decoupling torque is generated through spatial deflection vector field modeling, regional coupling tensor analysis and a dynamic direction alignment matrix, and power consumption constraint and a dynamic environment parameter optimization control instruction are fused; and finally, driving the quadrilateral moment gyroscope to execute correction, and constructing a multi-dimensional evaluation index based on the attitude response residual error. According to the method, adaptive closed-loop adjustment of the control strategy is realized, and the robustness under wind speed disturbance and load variation is improved.

The invention relates to a high-single-mode ultra-low-loss hollow-core anti-resonance optical fiber which comprises an outer cladding and an inner cladding, the inner cladding is composed of nested structure units, the nested structure units are arranged in the circumferential direction of the inner wall of the outer cladding and are connected with the inner wall of the outer cladding, a fiber core is formed by a central cavity wrapped by the inner cladding, and the fiber core is connected with the inner cladding through the nested structure units. The embedded glass tube is characterized in that each embedded structure unit comprises three or more layers of embedded glass tubes with different radiuses, at least one embedded glass tube with at least one layer of embedded glass tubes deflects towards one side relative to the adjacent outer embedded glass tube, and the deflection included angle is 5-55 degrees. According to the invention, through the change of the cladding structure, the reasonable nested structure unit shape capable of being prepared, the optimized nested size combination and the deflection of the embedded glass tube, the leakage loss of the LP11 mode is obviously improved, the influence on the fundamental mode performance is small, and finally the single-mode performance of the optical fiber is effectively improved.

The invention discloses a textile production defect detection method and system based on image processing, and belongs to the field of textile defect detection. According to the method, the point cloud data is generated by collecting the surface deformation stripes, and the penetrability reflection signal containing the sound wave propagation time is obtained through the multi-frequency ultrasonic probe. Denoising the point cloud data and then positioning a surface deformation candidate area based on a curvature gradient and a normal vector deflection angle; and an internal abnormal region is determined by separating and extracting a reflection wave amplitude value and a time delay parameter through an ultrasonic frequency band. And matching the surface point cloud coordinates with the ultrasonic propagation time by adopting an iterative nearest point algorithm to establish feature association between the normal vector deflection angle and the reflected wave amplitude. And dynamically distributing fusion weights for the surface features and the internal features according to the curvature gradient change rate and the amplitude attenuation rate to generate a multi-modal defect distribution diagram. And geometric shape and reflection intensity parameters are extracted and matched with a preset defect template to realize type and position judgment, and the method can be suitable for production defect detection of the thick textile with a multi-layer composite material structure.

The invention provides a three-dimensional galvanometer correction method and laser processing equipment. The method comprises the steps of controlling a motion platform to move to a reference surface of a galvanometer assembly; determining a contour line of a circle with a preset value as a radius on a medium of the motion platform by taking the central point of the galvanometer assembly as a circle center; a plurality of first marking grids are marked on the contour line in the preset direction through laser, each first marking grid in each first marking grid corresponds to one deflection angle, and each first marking pattern corresponds to the position of one zoom lens; detecting each first marking grid based on a visual component so as to determine a first target position corresponding to the focal point of the laser from the positions of the zoom lens corresponding to the plurality of first marking patterns of each first marking grid; fitting the radius of the contour line and the first target positions corresponding to the plurality of first marking grids to obtain a first curve; and compensating the position of the zoom lens according to the first curve. By means of the method, the three-dimensional galvanometer can be accurately corrected.

The invention discloses a laser channel atmospheric turbulence fading real-time compensation device and method based on a galvanometer system, and the method comprises the steps: enabling an incident light beam to irradiate a transparent PCB integrated with a photodiode array after the incident light beam is focused through a convex lens, obtaining the light intensity distribution of a current light spot through the photodiode array, and transmitting the light intensity distribution to a signal processing unit; the signal processing unit coarsely adjusts the deviation direction of the light spots according to the received light intensity distribution data, and aligns the part with the strongest light intensity in the light spots to the end face of the optical fiber; and based on the roughly adjusted light spot deviation direction, the signal processing unit dynamically adjusts the deflection angle of the galvanometer by using a gradient descent method according to the power measurement value of the receiving coupling module, so that the fine adjustment of the light spot deviation direction is realized, and the receiving coupling power is maximized. The objective of receiving optical power maximization is achieved, optical design, electronic control and algorithm optimization are combined, and atmospheric turbulence compensation with high cost performance is achieved.

The invention discloses a rotating mirror system target tracking method for optical flow auxiliary prediction, and the method comprises the steps: obtaining a target image in real time through a rotating mirror system, and dividing the image into a plurality of regions through uniform grid division; and based on the image gray values of the current frame and the previous frame, matching each region by adopting a mean shift algorithm to obtain an initial center coordinate and an optical flow vector. And the optical flow vector is iteratively optimized, so that the luminosity consistency error is minimized, and the accurate target position and motion information are obtained. And predicting the target position of the next frame according to the target position and the optical flow component thereof, and correcting the deflection angle in combination with the optical flow residual error. According to the method, efficient target tracking can be carried out in a complex dynamic environment, and continuous and accurate positioning of the rotating mirror system on the target is ensured. By adopting the method, the target tracking precision and the system response speed can be remarkably improved, the robustness and the real-time performance are high, and the method is suitable for high-precision target tracking application.

The invention relates to a charged particle beam scanning aberration correction method and system. The method comprises the following steps: determining a reference deflector and a deflector to be calibrated; respectively acquiring a first scanning image of the reference deflector and a second scanning image of the deflector to be calibrated; determining a first scanning deflection angle of the reference deflector according to the first scanning image, determining a second scanning deflection angle of the to-be-calibrated deflector according to the second scanning image, and determining a scanning deflection angle difference according to a difference value between the first scanning deflection angle and the second scanning deflection angle; obtaining a design angle difference between the reference deflector and the deflector to be calibrated; determining a mechanical deviation angle according to a difference value between the scanning deflection angle difference and the design angle difference; determining an imaging compensation angle according to the mechanical deviation angle, and outputting a target scanning waveform based on imaging parameters of the pattern generator adjusted according to the imaging compensation angle; and correcting the scanning signal according to the target scanning waveform. According to the invention, the scanning aberration of the charged particle beam scanning imaging system can be corrected, so that the imaging quality is improved.

The utility model discloses a lagging jack mounting trolley capable of accurately positioning a lagging jack. The lagging jack mounting trolley comprises a trolley main body and a steering system, an arch frame lifting and jacking device is arranged on the trolley body, the arch frame jacking device comprises two jacking longitudinal beams which are arranged in parallel in the longitudinal direction of the trolley and provided with a plurality of arch frame carrying trolleys, and the jacking longitudinal beams ascend and descend based on jacking oil cylinders at the two ends; the two plane scanning laser radars are located at the front end and the rear end of the vehicle and used for obtaining tunnel side wall contour data; the bearing cross beam is arranged between the jacking oil cylinder and the jacking longitudinal beam, and a position adjusting device is connected between the jacking longitudinal beam and the bearing cross beam. The device has the advantages that the plane radar is used for obtaining tunnel contour data to control a vehicle to run in the middle, the position adjusting device is used for adjusting the left-right position and the deflection angle of the vehicle, and the purpose of accurately positioning the arch center is achieved. Labor intensity can be relieved, potential safety hazards are reduced or eliminated, accurate centering of the arch center can be rapidly achieved, and the installation efficiency of the arch center is improved.

The invention relates to a calibration method, device and equipment of a laser scanning galvanometer performance detection device. The method comprises the steps that a laser is controlled to emit laser, a rotating table and / or a scanning galvanometer are / is controlled to rotate until a position sensitive detector detects that a light spot of the laser is located at a preset zero point position, and the deflection angle of the rotating table is determined as an initial angle; determining an angle range based on the initial angle and a preset angle, controlling the rotating table to rotate in the angle range, and obtaining light spot positions detected by the position sensitive detectors at multiple angles in the angle range; based on the light spot positions at the multiple angles, calibration parameters in the target calibration function are solved; the solved target calibration function is used for carrying out performance detection on the scanning galvanometer. By adopting the method, the laser scanning galvanometer performance detection device can be automatically calibrated.

The invention discloses a pipeline flange butt joint method based on multi-sensor cooperation and a storage medium, and the method comprises the following steps: when a mechanical arm carries a movable pipeline to approach a fixed pipeline, a magnetic encoder is utilized to detect the axial relative deflection angle of the pipeline, and the mechanical arm is controlled to adjust the axial posture of the movable pipeline to realize axial alignment. Under the axial alignment condition, the mechanical arm moves horizontally, the laser distance measuring sensor measures the linear distance, and meanwhile the axial deviation is continuously corrected by combining data of the magnetic encoder. And after the linear distance meets a preset threshold value, the industrial camera collects images of the movable pipeline flange and the fixed pipeline flange, a bolt hole coordinate set is recognized through an image processing algorithm, the rotating angle of the mechanical arm is calculated, the mechanical arm is controlled to rotate, bolt holes of the two flanges are accurately aligned, and butt joint is completed. According to the method, precise positioning of the pipeline flange in the axial direction, the plane direction and the rotating direction is achieved through closed-loop cooperation of the magnetic encoder, the laser ranging device and the visual sensor, and the butt joint precision and reliability are improved.

This system and method of for providing a tunable orbital angular momentum system for providing higher order Bessel beams comprising: an acousto-optical deflector configured to receive an input beam, deflect a first portion of the input beam a first deflection angle relative to an axis of propagation and along an optical axis and deflect a second portion of the input beam a second deflection angle relative to the optical axis; a line generator disposed along the optical angle for receiving the first portion and the second portion of the input beam and provide an elliptical Gaussian mean; a log-polar optics assembly disposed along the optical angle for receiving the elliptical Gaussian beam and wrapping the elliptical Gaussian beam with an asymmetric ring; and, a Fourier lens configured to receive the wrapped elliptical Gaussian beam.

The invention discloses an S-wave seismic phase first arrival identification method based on actually measured blasting-induced particle vibration signals, and relates to the field of negative effect monitoring and safety evaluation of blasting vibration induced by rock blasting excavation, and the method comprises the steps: determining a blasting scheme based on a scanning result; arranging a blasting vibration sensor; acquiring actual measurement waveforms of blasting vibration at different blasting center distances; constructing an S-wave seismic phase first arrival recognition function; and obtaining the first arrival moments of the S-wave seismic phases of the actually measured vibration waveforms at different explosion center distances. Compared with the prior art that the recognition precision of the S wave of the blasting vibration signal under the engineering scale is low and the like, by comprehensively utilizing the differences of the S wave, a noise signal, a P wave and a P wave tail wave in the aspects of energy, frequency, polarization characteristics and the like, recognition parameters such as the ratio of transverse energy to total energy, the polarization degree and the deflection angle are introduced, and the transverse energy serves as a weight coefficient; an S-wave recognition function suitable for actual measurement of blasting vibration is provided, and the technology has the advantages of small recognition error, high efficiency and the like.

The invention relates to a sight angle rate extraction method based on depth target tracking, and relates to the field of navigation control and computer vision. Comprising the steps of deploying a variable-focus optical camera on an unmanned aerial vehicle, and setting a normal of the center of a mirror surface of the camera to be inclined at a certain angle with a horizontal plane for acquiring complete information of a target; calibrating the target in the camera based on an optical parameter calibration method, and obtaining a field angle of the target relative to the center of the camera; deploying a target tracking algorithm on the unmanned aerial vehicle, and identifying a target position based on the target tracking algorithm; obtaining a horizontal deflection angle and a pitching deflection angle of the target relative to the center of the camera by combining a target position identified by a target tracking algorithm based on the field angle; and estimating the line-of-sight angular rate through Kalman filtering based on the obtained horizontal deflection angle, the obtained pitching deflection angle and the flight parameters of the unmanned aerial vehicle. Through combination of parameter calibration of the optical camera and a target tracking algorithm based on deep learning, the horizontal deflection angle and the pitching deflection angle of the target can be accurately obtained.

A system for deflecting an optical beam is provided. The system includes a first substrate, a first metasurface fabricated on a surface of the first substrate, a second substrate substantially parallel with the first substrate, a second metasurface fabricated on a surface of the second substrate, and an actuator configured to translate one of the first substrate and the second substrate relative to the other of the first substrate and the second substrate by a first translation distance in a first direction parallel to the surface of the first substrate and the surface of the second substrate. The first translation distance corresponds to a first target deflection angle of the optical beam.

The invention discloses an aircraft front wheel electrical zero calibration method, device and equipment and a medium, relates to the technical field of aircraft front wheel control, is applied to ground comprehensive maintenance equipment, and comprises the steps that a target angle instruction is used for controlling a scale line of a rotating sleeve in a nose landing gear to be aligned with a scale line of a front supporting column outer cylinder; a front wheel shimmy damping instruction is sent to a front wheel operation control box of the aircraft, so that the front wheel operation control box controls front wheels to keep stable; the current angle information of the front wheel angle sensor is determined as current electrical zero position reference information; the front wheel and the rotating sleeve are controlled to rotate through a front wheel rotating instruction, and if the deflection angle of the scale mark of the rotating sleeve is matched with the front wheel rotating instruction, it is judged that front wheel electrical zero calibration of the aircraft is completed. And the accuracy and simplicity of the electrical zero calibration of the airplane front wheel are improved.

The invention discloses a three-degree-of-freedom measurement method based on a planar two-dimensional time grating sensor, and the method comprises the following steps: enabling a movable ruler base body and a fixed ruler base body to be installed in a parallel and opposite manner, and leaving a certain gap between the movable ruler base body and the fixed ruler base body; after same-frequency and equal-amplitude sine excitation signals with the phase difference of pi / 2 are applied to the four-phase excitation electrode groups on the fixed ruler base body respectively, the movable ruler base body moves in the X direction and the Y direction and deflects around the Z axis relative to the fixed ruler base body; the single sensing unit on the movable ruler base body can solve output signals deflecting in the X direction and the Y direction and around the axis, the output signals of all the sensing units are subjected to combined operation, and displacement values of the movable ruler base body in the X direction and the Y direction and the deflection angle theta can be decoupled. According to the method, displacement measurement in the X direction, the Y direction and the deflection angle around the Z axis can be achieved through combined calculation between the induction units on the movable ruler base body, the calculation speed is high, interference can be further eliminated, and the measurement precision is improved.

The invention relates to the technical field of bag-type dust removers, and particularly discloses a high-efficiency low-heat-loss bag-type dust remover which comprises a dust remover body and further comprises a detection assembly arranged on one side of the dust remover body and used for detecting the gas pressure difference of the two sides of a bag according to the deflection angle. Through the detection assembly, the gas pressure difference on the two sides of the cloth bag can be converted into the deflection angle of the pressing rod for detection, and according to the deflection angle, detected by the detection assembly, of the pressing rod, when the deflection angle of the pressing rod reaches a limit value, the triggering assembly can automatically control the dust removing assembly to remove dust on the surface of the cloth bag; the trigger assembly can also automatically adjust the trigger limit value of the detection assembly according to the humidity condition of the dust-containing gas, the cleaning strength of the dust removal assembly can be adjusted according to the humidity of the dust-containing gas through the regulation and control assembly, the dust stripping effect is improved, the cleaning effect on the cloth bag can be improved, and the subsequent filtering efficiency of the cloth bag can be improved.

The invention discloses a visual labeling mechanism device and an automatic labeling method thereof, and the method comprises the steps: obtaining a workpiece surface image in motion in real time through a visual assembly, extracting a pose parameter of a workpiece in combination with an image processing algorithm, generating a pose data set containing a coordinate parameter and a deflection angle, and inputting a motion prediction model. Calculating a future movement track of the workpiece in combination with the speed parameter of the conveying line, and generating an adjustment instruction set of the labeling head; the movement track of the multi-axis mechanical arm is controlled based on the adjusting instruction set, the attaching pressure of the label contact face is adjusted through the pressure feedback module, and labeling operation of the curved surface of the workpiece is completed; a line scanning camera module is used for scanning the geometric position of the labeled label, a real-time detection result is generated by comparing the geometric position with a preset quality standard, a compensation signal is triggered if position deviation exists, and compensation operation is conducted through a compensation pressure head so as to ensure that the labeling quality meets the preset standard; and through cooperative control of visual identification, track prediction and compensation, the stability and the fitting precision of dynamic labeling are effectively improved.

The invention relates to the technical field of underwater robot control, in particular to an autonomous line patrol motion control method of an underwater cable detection robot, which comprises the following steps of: establishing a six-degree-of-freedom kinematics equation and a kinetic model of the robot, and collecting position information of the robot and a current heading angle of the robot; the target heading angle of the robot is calculated through an optimal deflection angle fusion algorithm, the current heading angle, collected by a sensor, of the robot is compared with the target heading angle, an error epsi is obtained, and the error epsi is added into a single-ring PID algorithm for adjustment; and controlling the thrust and direction of a propeller in the underwater cable detection robot according to a control signal tau (t) output by the single-loop PID algorithm and robot position information, judging whether a target heading angle of the underwater cable detection robot is consistent with a current heading angle, if so, completing autonomous line patrol, otherwise, continuing to correct, and if not, completing the detection of the underwater cable detection robot. The attitude control precision and the path navigation stability of the robot in the underwater environment are improved.

The invention discloses a beam synchronous phase on-line measurement method, device and equipment and a medium. The beam synchronous phase on-line measurement method comprises the steps of obtaining an original cavity pressure Vc * and an original forward voltage Vf * of a radio frequency cavity; processing the original cavity voltage Vc * and the original forward voltage Vf * to obtain normalized cavity voltage Vc and forward voltage Vf; calculating steady-state values UC and UF of the cavity pressure Vc and the forward voltage Vf, and solving detuning delta omega in a steady state; carrying out linear fitting on the cavity pressure change Vcb caused by the beam current to obtain a phase angle Vcb; according to the selected time window TW, calculating a deflection angle alpha th of a phase angle Vcb caused by detuning delta omega; deducting the deflection angle alpha th from the phase angle Vcb to obtain the phase angle Vb of the beam equivalent voltage; and extracting a beam phase # imgabs0 # based on the phase Vb of the beam equivalent voltage. The calculation result of the method is not influenced by phase drift caused by environmental factors any more, and is not influenced by cavity detuning any more.

The invention discloses a leveling device and leveling equipment, relates to the technical field of mine blast hole environment detection, and aims to solve the technical problem that the accuracy of a detection result is affected as an existing hole environment detection device is easily in an inclined state during use. The leveling device comprises a base, an adjusting assembly, a mounting frame, a gradienter and a control module, wherein the adjusting assembly is connected with the base; the mounting frame is connected with the hole environment detection device, the gradienter is arranged on the mounting frame, and the mounting frame is in transmission connection with the adjusting assembly; the control module is electrically connected with the gradienter and the adjusting assembly. The leveling device is connected with the hole environment detection device through the mounting frame, the control module can automatically drive the adjusting assembly to adjust the space posture of the mounting frame according to the deflection angle data fed back by the gradienter, it is ensured that the mounting frame is always kept in the horizontal state, and the posture of the hole environment detection device is synchronously corrected; and the detection result accuracy of the hole environment detection device is improved.

The invention discloses an ultra-deep well winding and lifting deflection angle self-adaption head sheave system which comprises a head sheave, a swing platform, a constraint platform, a swing mechanism, an angle adjusting mechanism, a detection feedback device and an adjusting module. The whole system is erected on a shaft tower platform; the center of the slewing mechanism is provided with a hole for the steel wire rope to penetrate; the swinging platform is arranged on the constraint platform and swings on the constraint platform by taking the slewing mechanism as a circle center; the head sheave is erected on the swing platform, a rope groove of the head sheave is arranged in the radial direction, and the head sheave swings along with the swing platform. The angle adjusting mechanism is connected with the swinging platform; a steel wire rope is led out from the winding drum, passes through a rope groove in the head sheave and then penetrates through a hole in the slewing mechanism to be connected with a hoisting container; the detection feedback device is used for acquiring steel wire rope related data; the adjusting module is used for adjusting the swing amplitude and frequency of the swing platform according to the feedback information. The function of real-time angle adjustment is achieved, friction between the head sheave and the steel wire is avoided, and the stability and safety of the system are improved.

The invention provides a vector nozzle, a multi-degree-of-freedom vector nozzle and an aircraft, the vector nozzle comprises a first air injection section, a second air injection section and a third air injection section, the first end of the first air injection section is provided with a convex ring; an annular groove is formed in the first end of the second air injection section; the rack and the driving gear are meshed with each other, the rack is fixed on the outer surface of one of the first air injection section and the second air injection section, and the driving gear is fixed on the outer surface of the other one of the first air injection section and the second air injection section through a base; the protruding ring is clamped in the annular groove, and at least one set of balls are arranged between a plurality of sets of faces, directly opposite to the annular groove, of the protruding ring. And a deflection angle exists between the axis of the air inlet and the axis of the air outlet of at least one of the first air injection section and the second air injection section. According to the vector nozzle, the air injection direction of an engine can be changed.

The invention relates to a prediction backstepping control method for a hypersonic flight vehicle. The method comprises the following steps: S1, constructing a mathematical model of the hypersonic flight vehicle; s2, decoupling the mathematical model of the hypersonic aircraft into a speed subsystem and a height subsystem; s3, taking the weighted sum of the speed tracking error and the accelerator opening degree as an optimization performance index, and solving through the speed subsystem to obtain the accelerator opening degree of the hypersonic aircraft; s4, designing a prediction backstepping controller for the height subsystem, and solving the rudder deflection angle of the hypersonic aircraft through the prediction backstepping controller by taking the weighted sum of the height tracking error and the trajectory inclination angle as an optimization performance index; and S5, the hypersonic aircraft is controlled according to the rudder deflection angle and the accelerator opening degree.

The invention discloses an April Tag positioning and attitude resolving method based on an LM algorithm, and belongs to the technical field of computer vision, and the method comprises the following steps: 1) carrying out camera calibration on a camera for positioning; 2) an April Tag graph is arranged on a carrier plane needing to be positioned, and a camera is used for shooting; (3) the shot April Tag image is subjected to preprocessing; 4) analyzing the preprocessed April Tag graph, and marking the image; 5) carrying out preliminary attitude calculation on the image; 6) performing iteration by using an LM algorithm; and 7) constructing a three-dimensional coordinate system for representing the attitude of the camera, drawing an arrow on the image, and displaying the deflection direction of the arrow and the camera. The method has the beneficial effects that the attitude calculation result is more accurate by using the LM algorithm for iteration, and the accuracy of the attitude calculation is improved by calculating and drawing the arrow of the deflection angle. And the deflection difference between the direction of the carrier on a two-dimensional plane and the positive direction of the camera can be more intuitively and conveniently seen.

The utility model discloses a collimator for optical instrument parallelism adjustment, which relates to the technical field of optical instrument detection equipment and comprises a laser generator and a cylinder fixedly connected to the output end of the laser generator, a frame is slidably connected to the inner arc wall of the cylinder, and a convex lens is coaxially arranged on the inner side of the frame. The outer arc wall of the convex lens is slidably connected with four fixing seats which are distributed in an annular array, and the ends, away from the convex lens, of the fixing seats are rotatably connected to the inner arc wall of the frame body; according to the utility model, the deflection angle of the lens is adjusted through the plurality of first adjusting knobs, the direction of a light beam output by the laser generator after being refracted by the lens can be finely adjusted, so that the light beam can more accurately point to a target position, and the second adjusting knob enables the lens to axially move so as to adjust the focusing position of the light beam. It is ensured that the light beam forms a clear focus at the target position, meanwhile, the adjustable lens can eliminate light beam deflection caused by manufacturing or assembling errors, and therefore the adjustment and calibration precision is improved.

The invention relates to an ultra-low side lobe row feed array. The main types of current engineering include a traveling wave waveguide array and passive row feed with unequal power division feed. Due to the existence of an azimuth frequency scanning angle, zenith scanning blind spots exist, the larger the frequency deflection angle is, the larger the scanning dome blind area is, and azimuth beams are fixed, so that multiple beams cannot be formed; although the beam points to the normal direction, the defect of large loss exists. Aiming at the defects in the prior art, the invention provides the ultra-low side lobe dual-polarization active row feed array with variable unit number and unequal power division, a form based on an unequal unit active subarray is adopted, dual-polarization active row feed is realized, and the ultra-low side lobe dual-polarization active row feed array has the characteristics of ultra-low side lobe, low cost and low loss.

The invention discloses an impact resistance detection device and method for light guide film production, and relates to the technical field of film production. The device comprises a supporting frame and a light guide film which are arranged on a supporting base, and further comprises a positioning unit which is arranged on the supporting base and comprises a positioning assembly and a pushing assembly; the impact unit provided with an impact ball is arranged on the positioning unit and comprises a deflection assembly, an impact assembly and a distance adjusting assembly, the deflection assembly is used for adjusting the angle of the impact assembly, and the distance adjusting assembly is used for adjusting the stroke of the impact ball according to the deflection angle to achieve equal-force impact. The device has the advantages that multi-angle impact resistance detection can be carried out on the light guide film, the detection range is wider, the impact stroke of the impact ball is flexibly adjusted according to the inclination angle after the inclination angle is adjusted, the impact force of the impact ball impacting the light guide film at different inclination angles is kept the same, drop point deviation cannot occur under the action of gravity, and the detection accuracy is improved. And the detection result is more accurate.

The invention belongs to the technical field of aerospace, and relates to a trailing edge flap driving mechanism for adjusting a rotor cone and dynamic balance and controlling vibration, a driver transmits high-frequency dynamic motion to a trailing edge flap through a push-pull rod, and the trailing edge flap is driven to dynamically deflect at high frequency to change aerodynamic load and aerodynamic-elastic coupling response of a blade; when the trailing edge flap dynamically deflects at high frequency, the push-pull rod drives the trailing edge flap to change the initial deflection angle through stretching and retracting of the piston rod so as to change the aerodynamic load and elastic deformation of the paddle; the trailing edge flap driving mechanism drives the trailing edge flap to dynamically deflect at high frequency, and passing frequency vibration of a rotor wing can be restrained; meanwhile, the push-pull rod can change the initial deflection angle of the trailing edge flap, so that the rotor cone is actively adjusted, and the vibration load of the rotor is reduced.