3047 results about "Optical measurements" patented technology

The invention provides an aluminum alloy auxiliary frame welding accurate positioning and quality control method and system. The method comprises the steps that S4, welding gun track control parameters are updated through a dynamic adjustment instruction, laser tracking data are fused to optimize the welding path angle in real time, and the accurate movement track of each section of welding seam is determined; s5, acquiring real-time thermal expansion data during welding execution, monitoring temperature field distribution of a welding seam area by adopting an optical measurement technology, and judging whether thermal deformation adjustment exceeds a preset threshold value or not; s7, micron-sized welding spot positioning operation is executed according to the stable positioning state, the dynamic path optimization result is fused to generate a final welding instruction, and consistent welding seam quality data is output; and S8, after weld joint quality data are obtained, weld joint deviation and geometric consistency are detected through a laser tracking technology, whether welding quality meets design requirements or not is judged, and a quality verification report is generated. According to the method, the precision and consistency of intelligent welding of the aluminum alloy auxiliary frame are remarkably improved.

The invention discloses a display screen image visual angle unevenness correction method and device and a storage medium, which are used for improving the optical measurement precision of a display screen Mura inspection and compensation system. Aligning the central position of the sampling camera to the central position of the calibration screen; inputting the visual angle non-uniform calibration picture with the gray scale of g into a calibration screen; detecting an ROI (Region of Interest) on the calibration screen to generate a brightness array; inputting the pure-color picture with the gray scale of g into the calibration screen, and acquiring the pure-color picture through the sampling camera to generate a pure-color display screen image; calculating a gray average value of the pure color display screen image in the ROI region, and generating a gray average value array; performing centering normalization processing on the brightness array and the gray average array to generate normalized data; calculating a correction coefficient set according to the normalized brightness mean value data and the normalized gray mean value data; generating a group of distance arrays; and according to the distance array and the correction coefficient set, constructing a visual angle non-uniform model of the calibration screen under the gray scale g.

The invention discloses an indoor water tank sediment starting speed measurement system and method, and aims to solve the technical problem that data accuracy is affected due to the fact that a sensor disturbs a flow field in an existing measurement method. The core of the technical scheme is that the non-contact measurement characteristic of the PIV technology is applied to the whole process from flow field construction to data acquisition. The device is mainly composed of an imaging unit, a laser lighting unit, a movable sliding frame, a water flow adjusting unit and a buffer plate. Optical measurement is carried out through the imaging unit and the laser illumination unit, a physical sensor does not need to be arranged in a flow field, and interference of a measuring instrument on a water flow structure and a sediment starting process is fundamentally avoided. The movable sliding frame which is integrally designed integrates the functions of sediment laying, particle throwing and measuring, so that a test area can be quickly positioned; and the buffer plate and the water inlet and drainage adjusting unit are combined, so that a gradually-changed flow field from weak to strong can be accurately and stably simulated.

The invention relates to the technical field of optical measurement and geometric position measurement, in particular to a remote multipoint monitoring system and method for roadbed surface settlement, and the system comprises a plurality of distributed monitoring nodes and a remote data platform; the monitoring node comprises a heterogeneous sensor group and an edge processing module which is connected with the sensor group and is used for carrying out local preprocessing and fusion on multi-source data; the wireless communication module is used for sending the data to a remote data platform; the power supply and maintenance module provides electric energy and supports node cleaning and environment adaptation; the remote data platform comprises a data receiving and storage unit, a data fusion and analysis unit, an early warning unit and a visual user interface. According to the invention, a multi-sensor fusion intelligent monitoring network is constructed, all-weather and high-precision remote monitoring of urban road subgrade settlement and associated crack deformation thereof is realized, settlement trend prediction and early warning are provided through AI analysis, and the initiative and safety guarantee level of urban road maintenance are improved.

The invention relates to the technical field of optical measurement, in particular to a laser-based building engineering flatness measurement method and system, and the method comprises the following steps: obtaining point cloud data through three-dimensional laser scanning, dividing grids, removing low-density units, carrying out the statistics of a reflectivity mean value and a variable coefficient, extracting a normal main direction, and generating optical features; and constructing a weighted linear model to correct a classification threshold, performing density clustering analysis based on the corrected threshold, calculating height range and normal deviation distribution, outputting flatness and gradient indexes, and generating a construction surface flatness evaluation result. According to the method, through combination of three-dimensional laser scanning and point cloud density screening, a multi-dimensional optical feature vector is constructed, a classification threshold value is dynamically corrected through weight distribution, a normal and a height feature are integrated through density clustering, a regional collaborative index is constructed, matching performance and evaluation precision are enhanced, and construction surface flatness continuity, data relevance and deformation capture precision are improved.

The present invention proposes an electronic component appearance defect detection method and system based on multispectral imaging, which belongs to the field of optical measurement technology, including: obtaining an appearance image dataset of an electronic component to be detected, performing image preprocessing, extracting an area of ​​interest of the appearance of the electronic component to be detected, and obtaining a multispectral image of the area of ​​interest; extracting the spectral reflectance characteristics and spatial characteristics of the multispectral image of the area of ​​interest through a spectral reflectance reconstruction method combining a genetic algorithm and a neural network, and performing feature fusion to form a spatial-spectral joint feature dataset of the area of ​​interest, which is input into a trained appearance defect detection model to obtain the defect type and size of the appearance of the electronic component to be detected; and displaying the appearance defect detection results of the electronic component to be detected. The present invention improves the accuracy and efficiency of appearance defect detection of electronic components.

The invention provides an optical measurement miss distance processing method based on tracks and same-frame picture constraints. The method mainly comprises the steps of same-frame picture angle difference calculation, conversion from a space coordinate system to an observation station coordinate system, motion characteristic parameter representation, track speed constraint model construction and miss distance moment and miss distance calculation. That is to say, according to the method, the same-frame picture and the target motion trail speed constraint are utilized at the same time, multi-device measurement data are comprehensively applied, and key technical contents such as same-frame picture difference calculation, coordinate conversion, target trail motion characteristic representation extraction and miss distance parameterization solving model are elaborated; a data processing problem is converted into parameter estimation of a nonlinear regression model, so that a reliable miss distance result of the meeting section is obtained, and a new thought and a new solution are provided for application development of optical measurement equipment, processing of the miss distance in the air and application of optical measurement data.

The invention discloses a vision-based molded lens edge thickness detection method and a related device. The method comprises the following steps: introducing visible gas into an edge area of a molded lens to form a gas film disturbance layer; the gas film disturbance layer is excited by illumination to generate refractive index change; collecting an interferometric phase image corresponding to the scattered light intensity; carrying out Fourier transform analysis on the interference fringes and carrying out temperature correction; and finally, calculating edge thickness distribution through feature space mapping. A gas film disturbance layer is introduced to the edge of the lens to serve as a physical signal conversion bridge, and a multi-light-path interference imaging and spectrum analysis technology is matched, so that the interference problem of a transparent material in direct optical measurement can be effectively avoided, high-precision and non-contact detection on the edge thickness of the molded lens is realized, and the detection precision is improved. And meanwhile, the device has the characteristics of high environmental interference resistance and good measurement stability.

The invention relates to the technical field of display screens, aims to solve the problem that dynamic influence of environmental parameters on optical performance is not fully considered in calibration of a standard screen in the prior art, and provides a method and a system for improving the stability of the standard screen. The method comprises the following steps: controlling a standard screen to display a corresponding test pattern according to a preset measurement point layout; controlling an optical measurement instrument to measure a standard screen according to a preset sampling frequency to obtain optical measurement parameters, and obtaining physical parameters of the standard screen at the same time; compensating the optical measurement parameters according to a pre-constructed environmental parameter influence model and environmental parameters during optical measurement; constructing a physical optical parameter correlation model according to the compensated optical measurement parameters and physical parameters; and inputting real-time physical parameters of a standard screen into the physical optical parameter correlation model to obtain optical deviation prediction parameters, and dynamically correcting the standard screen. According to the invention, the stability of the standard screen in practical application can be obviously improved.

The embodiment of the invention provides a half-coal rock roadway surrounding rock loose circle dynamic detection device based on three-dimensional laser scanning, and belongs to the technical field of optical measurement. According to the dynamic detection device for the loose circle of the surrounding rock of the half-coal-rock roadway based on three-dimensional laser scanning, three-dimensional point cloud data of surface characteristics of the surrounding rock of the roadway are obtained by performing three-dimensional laser scanning on the surrounding rock of the half-coal-rock roadway, and a three-dimensional surrounding rock model of the surrounding rock of the roadway is newly built based on the preprocessed three-dimensional point cloud data; and performing surrounding rock surface characteristic comparison based on the three-dimensional surrounding rock model and the surrounding rock reference model, and determining a loosening circle area where the roadway surrounding rock is loosened. And finally, a monitoring report is generated based on the newly built three-dimensional surrounding rock model of the roadway surrounding rock, and the surrounding rock surface characteristics of the three-dimensional surrounding rock model are displayed in real time, so that the spatial distribution and change conditions of the loose circle of the roadway surrounding rock can be accurately obtained in real time, dynamic monitoring can be performed, and the safety of mine engineering is ensured.

The invention discloses an optical imaging and coding hole technology fused optical imaging system and method, and aims to integrate scattered polarization components in a reflected light signal into coding light field data with clear layers by constructing a polarization coding modulation system, so as to highlight a coupling relationship among optical elements. A refocusing sequence and a focal plane chromatography technology are adopted, spatial geometric information and light intensity distribution characteristics of different depth layers are fully excavated, and a three-dimensional distribution rule of surface topography is disclosed; wavefront correction and deformable mirror control technologies are introduced, imaging parameters of an optical system are adjusted in a self-adaptive mode, and the application range of measurement precision is expanded; light intensity modulation analysis and phase unwrapping window processing are combined, the change trend of the surface curvature is depicted, and key feature points of morphology measurement are grasped; finally, multi-dimensional and multi-level optical measurement information is fused, three-dimensional measurement output with rich content and reliable precision is formed, and comprehensive and high-quality measurement technology resources can be provided for application scenes such as precision optical detection and surface quality evaluation.

The invention relates to the technical field of optical data processing and simulation, in particular to a simulation analysis method and a simulation analysis system for an optical lens. The method comprises the following steps: collecting geometric parameters and material characteristics of an optical lens, and recording initial parameter information of the lens; based on the initial parameter information of the lens, constructing an initial simulation model of the lens through computer aided design software; acquiring feature data of the optical lens in a use scene, and recording an imaging demand and scene environment temperature and humidity of the use scene to obtain feature data of the use scene; through a data processing technology, a three-dimensional modeling technology and an optical measurement technology, lens geometric parameters and material characteristics are simulated and analyzed for use scene characteristics of the optical lens, a lens simulation optimization model is constructed, and optical performance evaluation is performed on the optical lens with specific use scene characteristics. Therefore, the simulation analysis effect of the optical lens is improved.

An optical measurement system may improve the accuracy with which it estimates distances to surrounding objects by upgrading various aspects of its data path. Spatial resolution may be increased by subdividing histogram buckets or integration registers based on spatial location. Saturation at any point in the data path can be detected and used to stop counting photons in individual pixels, which can then be normalized after a measurement is over. Multiple peaks can be detected using recursive or iterative techniques to identify a largest remaining peak at each stage. Instead of iterating through the histogram memory multiple times, a threshold can be pre-calculated based on an estimated ambient noise level, and peaks can be detected in a single pass.

The invention discloses an optical time stretching sweep frequency interference measurement Doppler effect compensation method and device, and relates to the technical field of non-cooperative target absolute distance measurement. In order to solve the defect that the absolute distance measurement precision is reduced due to the fact that the Doppler effect cannot be efficiently suppressed in a complex environment in the prior art, the technical scheme provided by the invention comprises the following steps: generating a sweep frequency laser signal and splitting the sweep frequency laser signal to form measurement light, reference light and resampling light; performing time stretching processing on the reference light to obtain a chirp signal; performing interference on measurement light and the chirp signal to obtain a measurement interference signal; performing interference on the reference light and the resampling light to obtain a reference interference signal; performing cross-correlation processing on the measurement interference signal and the reference interference signal, and extracting an optical path difference; and carrying out distance calculation by combining the resampling data, and outputting a target distance after the Doppler effect is compensated. The method is suitable for optical measurement work for performing high-precision absolute distance measurement on a non-cooperative target in a tiny vibration or disturbance environment.

The present invention relates to the technical field of inner diameter laser measurement, and specifically to a metal workpiece inner diameter laser measuring instrument, comprising a support frame, a main measuring column is installed through the left interior of the mounting plate, and the upper end of the main measuring column is connected to the output end of the motor above the mounting plate; an air storage airbag is installed in the internal slot of the support frame; a flow channel is opened inside the main measuring column, a circle of upper through holes is opened on the upper outer side surface of the main measuring column, and a circle of lower through holes is opened on the lower outer side surface of the main measuring column. The metal workpiece inner diameter laser measuring instrument is convenient for blowing away dust and impurities on the surface of the first laser ranging component, thereby greatly reducing the amount of dust in the surrounding environment of the first laser ranging component, thereby avoiding a large amount of dust from affecting the optical measurement accuracy of the laser measuring instrument, and thus facilitating the first laser ranging component to measure the inner diameter of the metal workpiece well.

To provide a technique capable of inversely transforming a detection signal of a photodetector by using an optimal transformation matrix.SOLUTION: An optical measurement device includes: an optical sensor unit for detecting pulse-like signal light so as to output a detection signal composed of exponential responses; an A / D conversion unit for converting the detection signal into a digital signal; a setting unit for setting a transformation matrix for inversely transforming the digital signal; and a calculation unit for inversely transforming the digital signal by the transformation matrix set by the setting unit so as to calculate an estimated pulse of the signal light.SELECTED DRAWING: Figure 1

An electronic device includes a device body having a back surface, a band configured to fasten the device body to a user with the back surface facing a body part of the user, an optical sensor system, and a device removal detector. The optical sensor system has a first optical measurement path and a second optical measurement path. The first optical measurement path has a first optical path length that differs from a second optical path length of the second optical measurement path. The device removal detector is configured to generate a device removal indication responsive to either of, a first set of object proximity measurements received from the optical sensor system for the first optical measurement path, or a second set of object proximity measurements received from the optical sensor system for the second optical measurement path.

The invention relates to the technical field of capacitance displacement sensor calibration, and particularly provides a differential capacitance displacement sensor scale factor test method and system based on a torsional pendulum, a detection pole plate is suspended through a suspension wire to form the torsional pendulum, and the rotation angle of the detection pole plate is measured through a high-precision optical measurement instrument; after excitation voltage is applied to the excitation pole plate, induced voltage is generated on the detection pole plate and interacts with the induction pole plate to generate electrostatic negative stiffness, so that the resonant frequency of the torsional pendulum is reduced, the induced voltage generated on the detection pole plate is calculated through the change of the resonant frequency, and then a scale factor is obtained. The induction voltage of the detection pole plate is indirectly tested in a non-contact mode, then the scale factor is obtained, actual measurement of the scale factor of the differential capacitance displacement sensor is achieved, errors generated by using simulation or theoretical calculation results are avoided, interference introduced by existing direct measurement of the induction voltage is also avoided, and the measurement accuracy of the differential capacitance displacement sensor is improved. And the measurement precision of the scale factor is effectively improved.

The invention provides an optical measurement method and device, and belongs to the technical field of optical measurement, and the method comprises the steps: starting a light source with the wavelength changing dynamically to generate a sweep frequency optical signal; dividing the light into a measuring beam and a reference beam by using a light splitting component, guiding the measuring beam to irradiate a target to be measured and then return along the same path, and guiding the reference beam to enter an optical component of which the optical path changes along with the wavelength and then return; based on the low-coherence characteristic of the light source, when the optical paths of the two light beams meet the interference condition, detecting an interference signal by using a sensing component; the optical path difference is determined according to time information in the interference signal, and the thickness of each reflection interface is calculated by combining refractive index data of a target to be measured. Different from the traditional low-coherence interference measurement which depends on a motor and the like to control the movement of a reflector, the method avoids the limitation of mechanical driving on the measurement frequency, and achieves the high-speed optical thickness measurement.

The invention relates to the technical field of spacecraft orbit control and space safety, and discloses a space debris orbit prediction and avoidance method, which comprises the following steps that: a ground computing center screens candidate targets and generates enhanced data packets for uploading; the spaceborne computer combines real-time navigation data to carry out geometric feature screening, and an instant high-risk target list is generated; controlling the star sensor to execute optical observation, and resolving an optical measurement relative orbit state by utilizing displacement superposition and Kalman filtering; selecting a high confidence coefficient or a conservative probability threshold according to the optical measurement state acquisition condition, and generating an avoidance instruction when the collision probability exceeds the limit; and the propulsion system responds to the instruction to execute avoidance, verifies the effect by confirming the semi-major axis variation and executes track recovery by selecting an aircraft. According to the method, the ground-air collaborative screening and shift superposition enhancement technology is adopted, the problems that the low-precision ephemeris false alarm rate is high and the detection capability of a satellite-borne sensor on a dark and weak target is insufficient are solved, and the accuracy of evasion decision making and the execution reliability are improved.

The invention discloses a multi-discharge efficient precision machining device and method for a milling cutter. The multi-discharge efficient precision machining device comprises a high-precision machining tool, an electric spark machining pulse power supply, a discharge monitoring device and a detection device. The high-precision machining machine tool comprises an electric spark machining machine tool, a spindle, a grinding wheel, a workbench and a machine tool body. The main shaft supports accurate movement in three directions; stable and controllable pulse current and voltage are output through the electric spark machining pulse power supply; a voltage probe and a current probe are arranged on the discharge monitoring device, and discharge voltage and current data are collected in real time through the voltage probe and the current probe; the detection device comprises a non-contact optical measuring instrument, the abrasion of the grinding wheel is monitored through the non-contact optical measuring instrument, meanwhile, the machining allowance of the milling cutter blank placed on the workbench and the size precision after finish machining are measured, and the surface quality of the milling cutter is detected; the machining precision and efficiency of the milling cutter are improved, and efficient precision machining of the milling cutter is achieved.

The invention relates to the technical field of machine vision and optical detection, in particular to a tea color automatic evaluation method and system based on machine vision. The method comprises the following steps: constructing a stable and repeatable optical measurement environment and calculating radiation baseline parameters; performing multi-band polarization sequence imaging on the tea sample to obtain original data with spectrum and structural characteristics; separating mirror surface and diffuse reflection components on the surfaces of the tea leaves, and performing spectrum consistency correction by combining a radiation baseline; performing multiband spectrum reconstruction and normalization processing on the basis of the corrected diffuse reflection image, mapping to a CIE Lab color space, extracting pixel-level brightness, chromaticity and color distribution statistical indexes, and generating a color feature vector in combination with spatial weighting matrix optimization; a final score is calculated by constructing a quantitative evaluation and grade judgment model and integrating perception color separation, drying calibration color separation and a penalty term, and a grade result is output. According to the method, objective, accurate and automatic evaluation of the color of the tea leaves is realized.

The embodiment of the invention provides an optical measurement method and system based on camera calibration and a distortion model, and a medium. The method comprises the following steps: shooting a plurality of calibration images and distortion measurement images at different angles and positions based on a three-dimensional calibration workpiece; analyzing the calibration image and the distortion measurement image based on a calibration algorithm to obtain camera parameters and a distortion model; obtaining a to-be-measured object image based on the calibrated camera, and extracting features of the to-be-measured object image; performing distortion correction on the image features of the to-be-measured object based on a distortion model to obtain corrected image features of the to-be-measured object; performing three-dimensional reconstruction on the corrected image features of the to-be-measured object to obtain a measurement image, and analyzing parameter information of the to-be-measured object based on the measurement image to obtain a measurement result; parameter calibration and distortion correction are carried out on the camera, so that the distortion error is reduced, and the measurement precision is improved.

The invention belongs to the technical field of flow field optical measurement, and particularly relates to a high-enthalpy plasma gas temperature measurement method, system and device based on an absorption spectrum. Generating a composite modulation signal through a high-frequency sine wave and a low-frequency sawtooth wave, and enabling incident light to pass through a flow field measurement area in parallel through laser modulation and beam shaping; the detector receives the transmission light and converts the transmission light into an electric signal containing harmonic information, the signal acquisition device is used for performing signal acquisition, the phase-locked demodulation algorithm is used for extracting second harmonic, and the temperature is inversely deduced by combining the double-spectral-line temperature measurement method and the Fourier coefficient amplitude ratio of the second harmonic with the HITRAN database. The system comprises a signal driving module, a laser emission module, a detection acquisition module and a temperature measurement module. The device is composed of a signal generator, an in-phase adder and the like, and a laser is matched with a driving power supply to guarantee stable work. According to the scheme, aiming at the problems of weak signal absorption and insufficient signal-to-noise ratio under complex working conditions, the measurement accuracy and reliability are improved by composite modulation, harmonic extraction and a bispectral line algorithm, and an effective means is provided for research on thermal characteristics of the high-enthalpy plasma.

The invention discloses an optical measuring device, a measuring method and application of the optical measuring device to a glass insulator, and relates to the technical field of glass insulator detection.The optical measuring device comprises a machine table, a machine cover is fixedly installed at the left side position of the top end of the machine table, and two side shafts which are symmetrical front and back are rotatably installed on the outer wall of one side of the machine cover; one end of each side shaft extends into the hood and is fixedly provided with a left chuck, and a main shaft is rotationally mounted on the outer wall of the hood between the two side shafts. According to the invention, the driven belt wheel traction structure drives the Y-direction adjustable double-station optical measurement mechanism to move in the axial direction of the glass insulator string, so that the glass insulator string completes optical measurement by the Y-direction adjustable double-station optical measurement mechanism which continuously and axially moves while rotating; therefore, through a synchronous motion phase structure of autorotation of the insulator string and Y-direction adjustable double-station axial movement, optical shielding limitation is broken through, and full-surface dynamic scanning of the glass insulator string is realized.

The invention discloses a weight function phase shift method for deformation field measurement, belongs to the technical field of optical measurement, is suitable for phase extraction and deformation field measurement of periodic structure images such as gratings and stripes, and has the characteristics of high speed and high precision. Weight function windows (a rectangular window, a triangular window, a cosine window and a Gaussian window) are applied in image processing, discrete Fourier transform is carried out after pixel gray values in the windows are multiplied by corresponding weights, and image phases at the center pixel positions of the windows are obtained. After the weight function window traverses all image pixels, the phase distribution of the whole image is obtained. And solving an image deformation field by using the phase difference of the images before and after deformation. Compared with the existing phase-based deformation field method, the method does not need complex image processing operation, and can solve the high-precision phase in one step and obtain full-field deformation only by using the weight function and the global pixel gray scale.

The invention relates to the technical field of optical measurement and metering equipment, in particular to an on-line precision calibration method for a laser line module in a high-low temperature environment, which comprises the following steps: acquiring horizontal and vertical offsets of a projection light spot of the laser line module, and collecting the temperature of the position of a laser transmitter; respectively calculating a horizontal offset interference degree and a vertical offset interference degree at each acquisition moment, and further obtaining a horizontal interference ratio and a vertical interference ratio; according to the change trend of the horizontal offset interference degree and the vertical offset interference degree within the preset duration before each acquisition moment, the horizontal and vertical interference variation of each acquisition moment is obtained, and then the compensation regulation factors of the horizontal offset and the vertical offset of each acquisition moment are obtained, and the horizontal offset and the vertical offset are compensated. And compensation correction values of the horizontal offset and the vertical offset are obtained, so that the projection precision of the laser line module is calibrated. According to the invention, the precision of projection calibration of the laser line module can be improved.

The invention relates to the technical field of optical measurement, in particular to a complex reflective object surface reconstruction method and system based on multi-system point cloud fusion, and the method comprises the steps: carrying out the joint calibration of the spatial relation among a camera, a projector and an LCD screen; projecting to a target object based on a projection grating phase method and a phase deflection operation path, and collecting structured light patterns of the two through a camera; phase solving is carried out on the structured light pattern collected by the camera, and a three-dimensional reconstruction result is obtained in combination with the joint calibration information; and world coordinate system matching and point cloud fusion are carried out on the three-dimensional reconstruction result based on the joint calibration information, and the three-dimensional morphology of the target object is generated. According to the method, the problems that in diffuse reflection reconstruction, patterns projected by a projector cannot be comprehensively collected due to exposure and height and gradient ambiguity cannot be solved by a monocular phase deflection technology in high reflection can be solved complementarily, high reflection and diffuse reflection objects can be solved, a complete reconstructed object can be obtained, and the reconstruction precision is improved.

The invention provides a high-precision optical pose measurement method based on tower recovery, which adopts a close-range bidirectional optical cooperation mode, measures a mark point of a recovery tower through an optical detector on a rocket, and determines the distance and the pose of the rocket relative to the recovery tower; and the optical measurement system of the recovery tower synchronously detects and identifies the rocket and controls a capture arm and a buffer mechanism of the recovery tower to move, and optical measurement data of the recovery tower are fed back to the rocket and are integrated with optical measurement data on the rocket to control landing of the rocket. According to the invention, optical measurement and navigation are introduced into rocket tower type recovery, and the method has the advantages of high measurement precision, high data frequency, interference resistance and the like. The relative relation between the rocket and the recovery tower can be directly obtained through optical pose measurement, compared with inertial navigation, the coordinate conversion process can be reduced, and the advantage of no accumulated error is achieved. Compared with satellite navigation, optical pose measurement does not depend on external signals, and higher independence and electromagnetic resistance are achieved.