131 results about "Horizontal angle" patented technology

The invention discloses a micron-sized high-precision automatic three-dimensional positioning device and method based on frequency interference and binocular vision, and the device comprises a horizontal and pitching rotary table, a distance measurement module, a binocular vision positioning module, and a multi-station networking control system. Calculating relative orientation parameters between hosts; a frequency scanning interference ranging module of the host is driven by the rotary table to align with the same target ball to obtain high-precision ranging data; and based on the relative orientation parameters and the multi-station distance measurement data, calculating three-dimensional space coordinates of the target ball through a forward intersection adjustment algorithm. According to the invention, through adjusting contrast light and shade information, target ball image information with high reflection brightness is obtained, according to binocular vision positioning information, a horizontal angle and a pitching angle of a point location relative to a current distance measurement module are calculated, angle information is transmitted to a rotary table, the distance measurement module is guided to align a corresponding target ball, and automatic target searching and align functions are realized.

The invention discloses a power transmission line foundation pit three-dimensional laser radar equipment error self-correction control method, and relates to the technical field of power transmission line construction, and the method comprises the following steps: firstly, defining the distance from three-dimensional laser radar equipment to a target point, a horizontal included angle and a vertical included angle based on a Cartesian coordinate system; determining an initial coordinate of the target point; secondly, selecting a reference control point, removing noise and gross error points, correcting offset in the vertical direction, and finely processing point cloud data; thirdly, defining errors in the X-axis direction, the Y-axis direction and the Z-axis direction, and establishing an error correction model; and finally, based on the observation value and an error correction model, carrying out self-correction on the target coordinate, and carrying out correction through an environment feature self-adaptive error weight distribution mechanism. According to the method, closed-loop iterative optimization is performed through a multi-level data verification mechanism, the measurement precision is ensured, the operation efficiency is improved, the environmental adaptability is enhanced, and the method is suitable for power transmission line foundation pit division operation under complex terrains.

The invention discloses a physical omnidirectional antagonistic interference method for a 3d infrared target detection system, and belongs to the technical field of artificial intelligence safety and infrared image processing. The method comprises the following steps: firstly, carrying out three-dimensional modeling and UV texture expansion on a target vehicle, and constructing a patch based on particle information; then generating a multi-view infrared confrontation sample covering multiple groups of pitch angles, horizontal angles and observation distances by utilizing Pytorch3D rendering; further constructing a multi-target fitness function considering the minimization of the detection confidence and the minimization of the patch area, and jointly optimizing the position, the shape and the size of the patch through a self-adaptive particle swarm optimization algorithm; and finally, introducing an expectation transformation (EOT) mechanism, and simulating imaging noise and patch offset in complex environments such as rain, fog, sand and dust, so as to verify the environment robustness of the scheme. The designed flexible disturbance patch can be physically arranged on the surface of a vehicle, and full-view infrared interference detection is achieved.

The invention discloses a method for positioning the position of an offshore structure based on an unmanned aerial vehicle loading monitoring system, the unmanned aerial vehicle loading monitoring system adopts a rigid platform suspended by an unmanned aerial vehicle cluster, and the rigid platform is provided with a full-automatic tracking total station, a GPS, a double-shaft tilt angle sensor and an ultrasonic distance measuring sensor. After the unmanned aerial vehicle cluster suspends the rigid platform to the inclined sky of the offshore structure, hovering is carried out; the flight height of the unmanned aerial vehicle cluster is adjusted through data of an ultrasonic distance measuring sensor, inclination angle data is measured through a double-shaft inclination angle sensor, and the levelness of the rigid platform is further calibrated; the full-automatic tracking total station is used for measuring the horizontal angle, the vertical angle and the slant distance of the offshore structure and uploading the horizontal angle, the vertical angle and the slant distance to the upper computer, the upper computer calculates the three-dimensional coordinates of the full-automatic tracking total station according to coordinate data of the GPS, and then the three-dimensional coordinates of the center point of the offshore structure are calculated. According to the invention, positioning of the offshore structure can be realized, monitoring dead angles are avoided, and personnel risk is reduced.

The invention relates to the technical field of flow field measurement, in particular to an ocean flow field measurement method and device, and provides the following scheme: the method comprises the following steps: collecting ocean environment parameters through a vertical sensor, determining an overlook angle of an inclination sensor based on an optimization algorithm, and generating a virtual Doppler measurement array through micro-amplitude scanning; inputting to a chaotic oscillator network to identify a Lyapunov exponent maximum direction, and determining a horizontal included angle of a second inclination sensor; furthermore, a frequency shift signal is collected, and the flow velocity and the flow direction are calculated by combining adjusting parameters, so that high-precision and high-adaptability flow field measurement is realized; the method has a dynamic response capability, and is suitable for direction structure identification and real-time flow direction calculation under complex sea conditions.

The invention discloses an automatic traverse measurement method for a tunnel, and the method comprises the following steps: setting a control point outside the tunnel, installing a prism on the control point, measuring the height of the prism, setting traverse points on the relatively stable inner walls of the two sides of the tunnel, installing a total station and a prism on each traverse point, measuring the instrument height and the prism height of each observation station; measuring a horizontal angle, a zenith distance and a slope distance through each traverse point to obtain observation data at each traverse point; data acquisition and transmission: acquiring angle and distance data at each lead point, and transmitting and summarizing the angle and distance data in a wireless or optical fiber manner; conducting traverse calculation to obtain coordinates of each traverse point; and result analysis is carried out. Through cooperative work of the total station, the automatic control platform and the data processing and analysis module, automation and high precision of wire measurement are realized. The system has the advantages of high automation degree, high precision, high reliability, strong adaptability and the like, and can meet the requirements of modern tunnel engineering on the measurement technology.

The invention discloses an intelligent inspection data acquisition method for a partial discharge instrument, and the method comprises the steps: starting a corresponding detection process according to the type of detected equipment; if it is judged that the defect exists, the type and grade of the defect are obtained, and the defect condition is calibrated, specifically, the step comprises the following steps that a to-be-detected part is scanned through an ultrasonic sensor of the partial discharge instrument; and if the detected signal is abnormal, measuring from different angles to eliminate noise influence and determine the position of the fault point, comprising the following steps of: performing measurement at different horizontal angles and vertical angles around the equipment fault point at a certain angle interval; and storing the test result information, and storing the test result information as a preset DAT data format and a WAV audio format. The invention also discloses a partial discharge instrument. According to the partial discharge instrument and the intelligent inspection data acquisition method thereof, the function integration level is further enhanced, and the detection efficiency is improved; the structure is simple and reasonable, and operation, repair and maintenance are easy.

This invention provides a portable surveying device for water conservancy projects, relating to the field of water conservancy engineering surveying technology. It includes a support frame; a motor A is fixedly installed at the upper part of the support frame, with the top of the motor A's shaft fixedly connected to the bottom of a gear assembly. An angle disk is fixedly installed at the top of the gear assembly. Motor B, in conjunction with the gear assembly, enables electric micro-adjustment of the horizontal angle. Combined with the angle disk and indicator frame, the angle value can be read intuitively, achieving high adjustment accuracy. When the slider is centered, the angle disk automatically returns to zero, quickly establishing a surveying benchmark and improving angle adjustment efficiency. This invention solves the problems of existing water conservancy surveying devices, which mostly rely on manual adjustment of the horizontal angle, resulting in low adjustment efficiency, poor positioning accuracy, and a lack of automatic zeroing and precise angle locking structures, making it difficult to meet the high-precision surveying requirements of water conservancy projects.

This invention discloses an automatic leveling geographic surveying instrument, belonging to the field of geographic surveying technology. The invention first acquires the tilt angle and tilt angle change rate of the total station base in real time, dividing station settlement into three stages: micro-settlement, significant settlement, and sudden settlement. For the micro-settlement stage, real-time error compensation is achieved through elevation correction of the line-of-sight height-time fitting curve and vertical axis tilt horizontal angle correction. For the significant settlement stage, high-precision automatic leveling based on a kinematic model, physical compensation for the three-dimensional displacement of the instrument center, and orientation reset are executed sequentially. For the sudden settlement stage, shutdown alarm and abnormal data marking are implemented. This invention also includes surveying instrument hardware with electrically telescopic outriggers and a multi-sensor system, adaptable to surveying operations in complex geological conditions, balancing measurement accuracy, operational continuity, equipment safety, and data utilization.

This invention discloses a self-correction control method for errors in a three-dimensional lidar device for foundation pit marking in power transmission lines, relating to the field of power transmission line construction technology. The invention is implemented through the following steps: First, based on a Cartesian coordinate system, the distance, horizontal angle, and vertical angle from the three-dimensional lidar device to the target point are defined to determine the initial coordinates of the target point. Second, reference control points are selected, noise and gross errors are removed, vertical offsets are corrected, and point cloud data is refined. Next, errors in the X, Y, and Z axes are defined, and an error correction model is established. Finally, self-correction of the target coordinates is performed based on the observed values ​​and the error correction model, and correction is achieved through an environmental feature-adaptive error weight allocation mechanism. This invention uses a multi-level data verification mechanism for closed-loop iterative optimization to ensure measurement accuracy, improve operational efficiency, enhance environmental adaptability, and is suitable for foundation pit marking operations in complex terrain.

Provided in the present application are an antenna, a communication device and a communication system. The antenna comprises a radome, a reflector plate and an adjustment device. The reflector plate and the adjustment device are arranged inside the radome to prevent impurities such as dust and moisture from damaging the adjustment device, thereby improving the reliability and stability of the adjustment device. The reflector plate is provided with a radiation unit array; and the adjustment device comprises a driving mechanism and a transmission mechanism, the transmission mechanism being connected between the driving mechanism and the reflector plate, the driving mechanism driving, by means of the transmission mechanism, the reflector plate to rotate around a first direction and a second direction, the first direction being perpendicular to the second direction, and the first direction and the second direction being respectively parallel to the reflector plate. The adjustment device adjusts the reflector plate to rotate around the first direction relative to the radome, thereby achieving the adjustment of the pitch angle of a radiation beam. The adjustment device adjusts the reflector plate to rotate around the second direction relative to the radome, thereby achieving the adjustment of the horizontal angle of the radiation beam emitted by the radiation unit array.

The invention relates to the technical field of radar calibration equipment, in particular to a high-precision radar static calibration adjustable test bench which comprises a base, and a multidirectional fixing frame is arranged on the base. The multidirectional fixing frame comprises a supporting frame rotationally installed on the base, a transverse rotating frame is arranged on the supporting frame, the rotating axis of the transverse rotating frame is parallel to the base, and a longitudinal moving frame capable of linearly moving in the width direction of the transverse rotating frame is arranged on the transverse rotating frame. According to the invention, the multidirectional fixing frame is arranged, the supporting frame capable of realizing autorotation on the multidirectional fixing frame and the transverse bogie transversely rotating on the supporting frame are utilized, so that rotation simulation in two directions can be realized, and the longitudinal moving frame capable of linearly moving in the width direction of the transverse rotating frame is arranged on the transverse bogie; the reflecting plate is fixed on the longitudinal moving frame, so that the reflecting plate can simulate application scenes of various pitching and horizontal angles, and the test precision is improved.

The invention belongs to the technical field of water level monitoring, and particularly relates to a water level monitoring method which comprises the following steps: acquiring point cloud data of a single-line laser radar for scanning a target area; determining a water surface height range according to the lowest point in the point cloud data and the maximum water penetration distance of the single-line laser radar in clear water; clustering the point cloud data, selecting data clusters within the water surface height range, and screening out the data cluster with the minimum distance from the lowest point to the single-line laser radar from the data clusters as a target data cluster; calculating the relative echo slope of each point in the target data cluster, and determining the point with the maximum value as a water bank junction point according to the relative echo slope of each point; and determining a water level value according to the water-bank junction point. According to the method, data errors caused by laser water penetration can be eliminated, meanwhile, the data errors caused by radar image inclination are eliminated by calibrating the horizontal angle of the single-line laser radar, and finally the accuracy of water level monitoring is improved.

The present application provides a precise photogrammetric control measurement method, device and system. The method includes: obtaining the control point coordinates of a plurality of control points arranged in the surrounding area of the object to be measured; a plurality of measured points are arranged on the object to be measured; by using a first total station instrument installed at a first measurement station, obtaining the first positional relationship between the first total station instrument and the control points, and obtaining the second positional relationship between the first total station instrument and the measured points; the first positional relationship includes the first distance, the first horizontal angle and the first zenith distance between the first total station instrument and the control points, and the second positional relationship includes the second distance, the second horizontal angle and the second zenith distance between the first total station instrument and the measured points; according to the control point coordinates of the control points, the first positional relationship and the second positional relationship, obtaining the measured point coordinates of the measured points, and determining the contour of the object to be measured according to the measured point coordinates. The method of the present application can accurately measure the coordinates of the measured points of the object to be measured.

The invention relates to a radar pitching error measurement method, device and equipment, a storage medium and a vehicle, and the method comprises the steps: obtaining a target point in a radar point cloud in front of a vehicle, and measuring the Doppler velocity of the target point, the horizontal angle of the target point, and the pitching angle of a radar and the target point; according to the installation angle of the radar, the vehicle speed, the Doppler speed and the horizontal angle, the target pitch angle of the radar and the target point is calculated through an anti-trigonometric function, and due to the fact that the target point and the vehicle speed have an accurate conversion relation, the accuracy of the calculated target pitch angle is higher; according to the method, the pitching error between the pitching angle and the target pitching angle is calculated, the radar pitching error is calculated in real time, operation of a driver is not needed, the calculated amount is small, time is saved, the labor cost is reduced, and the measurement precision and the measurement efficiency of the radar pitching error are improved.

The application provides a resistivity-based apparent resistivity correction method, system, medium and equipment, and relates to the technical field of electric field detection. The technical scheme provided by the application generates an in-group control scheme by matching a preset optimization target corresponding to an attribute label, adjusts a target control scheme according to inter-group influencing factors, and can adaptively adjust a measurement strategy according to geological characteristics. After collecting a vector receiving voltage, the initial apparent resistivity is vector synthesized according to a horizontal angle to obtain a target apparent resistivity, effectively solving the problem that a single component signal is weak and susceptible to noise interference in the traditional resistivity method. When a certain direction component signal is particularly weak or abnormal, the vector synthesis mechanism can avoid the appearance of negative apparent resistivity, improving data stability. The improvement of the final input data quality and the full use of vector information significantly improve the convergence of the inversion algorithm and the stability of the solution, can perform vector synthesis on the component signal, and improve the inversion effect of the resistivity method.

The invention relates to the technical field of astronomical teaching instruments, and discloses a teaching science popularization horizontal type celestial globe which comprises a base and symmetrically arranged arc-shaped supports, the tops of the arc-shaped supports are fixedly connected with a horizontal ring, the inner sides of the arc-shaped supports are rotatably provided with a meridian circle, the outer side of the base is provided with a horizontal adjusting assembly, and the horizontal adjusting assembly is fixedly connected with the arc-shaped supports. An auxiliary assembly is arranged at the top of the mounting ring, the levelness adjusting assembly comprises vertical grooves symmetrically formed in the bottom of the base and piston blocks slidably mounted in the vertical grooves, an upper ring body is fixedly connected to the top of the base, and adjusting rods are symmetrically mounted on the outer side of the upper ring body in a threaded mode. The supporting rod and the horizon ring can be adjusted to a horizontal angle according to the liquid bubble display of the liquid bubble level meter, so that the base and the placing surface are stably adsorbed and compressed, the levelness of the celestial globe during observation is conveniently kept, and the placing stability and the observation precision of the device main body are kept during subsequent rotating observation.

The present invention discloses a laser water ruler device, comprising a laser detection module for detecting altitude and horizontal angle; a control module connected to the laser detection module and configured to control the device based on the detection data from the laser detection module; a laser projection module connected to the control module and configured to project data onto a projection surface based on control signals from the control module; a mobile phone communication module; a network communication module; and a power supply module for supplying power to the laser detection module, the laser projection module, the control module, the mobile phone communication module, and the network communication module. Laser detection and laser projection allow the device to directly project altitude values ​​without manual conversion, and laser distance measurement is unaffected by the shape of the projection surface, resulting in more accurate measurement results and smaller errors.

The invention discloses a beacon rapid positioning and tracking system and method, and belongs to the field of atmospheric measurement. The ground receiving end comprises a scanning rack, a telescope, a wedge mirror, an imaging unit, a receiving end main antenna, a receiving end radio station and a receiving end auxiliary antenna; the transmitting end comprises a transmitting end shell, a transmitting end antenna, a transmitting end radio station, a beacon light, a tripod and an unmanned aerial vehicle. During measurement, the transmitting end transmits the position of the transmitting end antenna to the ground receiving end in real time, and the horizontal included angle between the transmitting end antenna and the receiving end main antenna and the height included angle between the transmitting end antenna and the ground horizontal plane are obtained through calculation by combining the position of the receiving end antenna. The ground receiving end adjusts a tracking and pointing system to enable the angles of the transmitting end and the receiving end to be matched based on the included angle and pitch angle data between the front and rear end antennas of the ground receiving end and the due north direction in combination with the angle information between the transmitting end and the receiving end, so that the beacon of the transmitting end can be stably tracked in different scenes, and parameter measurement can be efficiently and accurately realized after the beacon is locked.

The invention discloses a TBM (Tunnel Boring Machine) tunneling attitude control method in snakelike and multi-class surrounding rock stratums of a tunnel, and relates to the technical field of double-shield TBM tunneling construction. Comprising the following steps: initializing a VMT guiding system additionally provided with a laser transmitter; setting a balance pressure value, a tunneling unearthing amount and a propelling speed; tunneling is started, and construction coordinates on the TBM are determined by measuring the inclination distance, the horizontal angle and the vertical angle through the total station; the pea gravel blow-filling and grouting timeliness, the control point rechecking timeliness and the gap between the shield tail and the duct piece are controlled; the double-shield TBM curve tunneling posture and the deviation correction amount are calculated; the tunneling deviation correction amount of the dual-mode TBM is controlled through posture direction adjustment, rolling deviation correction, vertical deviation correction and horizontal deviation correction; it is ensured that the shield tunneling machine smoothly goes out of the hole and reaches the receiving base. According to the method, the problems of line type overrun of the shield tunneling machine, duct piece cracking, excavation face instability and the like are effectively avoided, and the construction quality and safety of a shield tunnel are guaranteed.

1. The name of the design product: Inclinometer. 2. The use of the design product: For detecting horizontal angles and inclination angles. 3. The design key points of the design product: Lies in the shape. 4. The picture or photo that best shows the design key points: Stereogram.

The application discloses a kind of angle measurement method, device, equipment and storage medium of double-inclined angle plate piece, the method comprises: the angle plate piece of two-way inclined structure in ship is modeled, respectively original near center line, original angle line and original upper edge line vertical projection in plan view, obtain vertical near center line, vertical angle line and vertical upper edge line, then horizontal projection to horizontal near center line, horizontal angle line and horizontal upper edge line, according to vertical near center line, vertical angle line and vertical upper edge line, and horizontal near center line, horizontal angle line and horizontal upper edge line construct the angle of angle plate piece angle line method surface angle, finally measure the degree of angle line method surface angle as the angle of angle plate piece. With the normal angle of double-inclined angle plate piece as processing basis, accurate reference is provided for angle rolling processing, the processing difficulty of double-inclined angle plate piece is reduced, the lofting development efficiency of double-inclined angle plate piece is effectively improved, and production cost is saved.

The invention provides a jig correction method and operation equipment. The jig correction method comprises the following steps of: providing a jig which is positioned in a carrying flow path capable of carrying an object to be carried and can selectively hold the object to be carried; providing an operation device, wherein the operation device is provided with a distance sensor; the operating device is driven to move to the position above the jig, the distance sensor measures different positions of the jig to obtain a plurality of measured values, and the horizontal angle of the jig is adjusted according to the measured values; therefore, the levelness of the jig can be automatically measured, and the levelness is used as a basis for subsequently adjusting the horizontal angle of the jig.

The application discloses a kind of based on background point cloud fine processing laser radar and camera joint calibration method, comprising: using laser radar and visible light camera to build experimental device, and construct the optimization equation for solving calibration matrix;The foreground point cloud of the calibration object scanned by laser radar is fitted as a straight line;For the straight line fitted, obtain the background point cloud of laser radar in the same scan line with it;According to horizontal angle, solve the edge point of calibration object;The three-dimensional feature point of calibration object is solved using the obtained edge point;The three-dimensional feature point obtained and the corresponding two-dimensional feature point obtained by visible light camera are brought into optimization equation to solve calibration matrix.The application can obtain the edge point of calibration object scanned by laser radar with high precision and solve accurate three-dimensional feature point, avoid the problem of insufficient feature point accuracy caused by low horizontal resolution of laser radar, thereby improve joint calibration accuracy.

The invention relates to a surveying traverse auxiliary teaching example generation method and system, which can realize horizontal angle observation, vertical angle observation, distance observation, automatic generation of traverse measurement examples, observation records and handbooks and automatic inspection of calculation results, and randomly generate different traverse examples based on traverse point coordinate results. The invention also discloses a traverse calculation method of the traverse measurement example. The system randomly generates different traverse calculation examples, reversely calculates traverse derivation theoretical numerical values according to traverse results, simulates observation errors existing in actual observation, reversely calculates traverse measurement example observation values and automatically generates a traverse observation handbook and a calculation handbook, and students perform traverse observation forward calculation through the observation handbook. And after the calculation result is submitted, the system automatically checks and scores. According to the invention, the problem of single traverse measurement example in the measurement textbook is effectively solved, and students can independently master the traverse measurement interior work calculation method.

The present invention discloses a beacon rapid positioning and tracking system and method, which belongs to the field of atmospheric measurement. It is composed of a ground receiving end and a transmitting end. The ground receiving end includes a scanning rack, a telescope, a wedge mirror, an imaging unit, a receiving end main antenna, a receiving end radio, and a receiving end auxiliary antenna; the transmitting end includes a transmitting end housing, a transmitting end antenna, a transmitting end radio, a beacon light, a tripod, and a drone. During measurement, the transmitting end sends the position of the transmitting end antenna to the ground receiving end in real time. Combined with the position of the receiving end antenna, the horizontal angle of the line connecting the transmitting end antenna and the receiving end main antenna and the altitude angle with the earth's horizontal plane are obtained by solution. Based on the angle and pitch angle data of its own front and rear antennas and the true north direction, the ground receiving end adjusts the tracking and aiming system in combination with the angle information between the transmitting end and the receiving end, so that the angles of the two match, ensuring stable tracking of the transmitting end beacon in different scenarios. After locking the beacon, parameter measurement can be achieved efficiently and accurately.

The invention discloses a speed-up railway precision conductor construction method with virtual control points added, which comprises the following steps: S1, arranging conductor points in a staggered manner along two sides of the advancing direction of a speed-up railway line, and arranging the virtual control points between the adjacent conductor points; s2, arranging total stations on each traverse point one by one, and arranging prisms on two front and back adjacent traverse points and adjacent virtual control points; observing each prism by using a total station to obtain a horizontal direction, a slant distance and a vertical angle from the center of the total station to the center of each prism; s3, performing gross error detection analysis on the observation values, and rejecting the detected gross error observation values or re-measuring the observation stations where the gross error observation values are located; and S4, establishing an acceleration railway conductor control network with virtual control points by using all reliable horizontal angles and horizontal distances. According to the method provided by the invention, on the premise of not increasing the burying cost of the control points, on the basis of the connecting wires, only several temporary target points are observed by each observation station, so that the effect of remarkably improving the precision and reliability of the control network is achieved.

The invention is suitable for the technical field of nuclear power stations, and provides a nuclear power station containment vessel defect detection method and device and electronic equipment.The nuclear power station containment vessel defect detection method comprises the steps that an image obtained by conducting image collection on the surface of a containment vessel through an image collection module is obtained, and the image collection module is carried on a cradle head; when the image contains the defect information of the containment, determining the distance between the defect information and the holder, and the current pitch angle and horizontal angle of the holder; and determining coordinates corresponding to the defect information according to the distance between the defect information and the holder, the current pitch angle and the horizontal angle of the holder, the surface radius of the containment and the vertical distance between the holder at the horizontal zero position and the surface of the containment. Through the method, the detection efficiency can be improved, and the cost can be reduced.

The application discloses a multi-scene robust Bluetooth AOA indoor positioning method, which comprises the following steps: obtaining the IQ value of each antenna array element; solving the phase of each antenna array element; performing eigenvalue decomposition on the covariance of the antenna array phase to obtain a signal space and a noise space; calculating the horizontal angle and the pitch angle that make the spatial spectrum P MUsIC The horizontal angle and the pitch angle that make the spatial spectrum P The application can improve the robustness of the angle, thereby improving the positioning precision.

The invention belongs to the technical field of interference direction finding, and relates to a broadband high-precision quadratic correlation interferometer direction finding method based on an FPGA. The method comprises the following steps: carrying out first phase correlation calculation by adopting an FPGA parallel calculation mode; performing second phase correlation calculation; performing quadric surface fitting on a curved surface formed by extending in the horizontal direction and the pitching direction; traversing all sample angles, calculating a matrix coefficient required by quadric surface fitting and an inverse matrix of a matrix, and storing a result in a BRAM (Block Random Access Memory) of the FPGA; solving a quadric surface coefficient to obtain a surface equation; and calculating a final horizontal angle and a final pitch angle according to the extreme points of the curved surface equation. According to the invention, quadratic fitting of the curved surface is realized in the FPGA based on a result storage mode, so that the direction finding precision of the correlation interferometer is improved; the phase correlation calculation and resource overhead of the direction finding of the primary correlation interferometer are obviously reduced, and the bandwidth performance and the real-time performance of direction finding are ensured while the direction finding precision is effectively improved.