814 results about "Vertical distance" patented technology

The invention relates to the technical field of computer vision detection, and discloses a height feature information generation method, device and equipment based on point cloud and a medium, and the method comprises the steps: obtaining three-dimensional point cloud data of the surface of an object to be detected, carrying out the preprocessing of the data to obtain a target point cloud, and carrying out the reference plane fitting of the target point cloud, and calculating the vertical distance of each point in the target point cloud based on the reference plane obtained by fitting and generating height difference data, and finally extracting and outputting surface height feature information according to the height difference data. According to the method, the three-dimensional point cloud data is subjected to preprocessing noise removal, datum plane accurate fitting and height difference data separation, high-precision extraction of tiny height changes of a complex surface is achieved, the detection efficiency is improved, dependence on high-cost optical equipment is reduced, and the method is compatible with various workpiece shapes.

The invention discloses a picture occlusion relation processing method and device and a storage medium, and relates to the technical field of rendering, and the method comprises the steps: determining a vertical distance between a target element in a to-be-rendered frame and a preset base point; performing normalization processing on the vertical distance to generate a floating point value corresponding to each target element; encoding the floating point value to generate at least one integer channel value corresponding to the element; storing the integer channel value corresponding to the target element to vertex color information of the grid data corresponding to the target element to generate a rendering grid; and rendering the target element based on the rendering grid. According to the method, the normalized and coded depth value is borne through the vertex color information, so that the technical problem that the rendering performance is low due to the fact that the node tree needs to be traversed in each frame and massive elements need to be sorted in the prior art is solved, seamless fusion of the depth data of the rendered elements and the vertex colors is realized, and the rendering efficiency of the elements is improved.

The invention relates to the field of mobile robot motion planning, and discloses a quadruped robot motion planning method and system based on height self-adaption. The method comprises the following steps: constructing 3D and 2D local obstacle maps according to coordinate transformation, and calculating a grid vertical distance through ray casting to generate a 2.5 D local obstacle map; determining an initial control sampling space by combining speed, acceleration and height constraints; discretizing a sampling space and simulation time, deducing a control value sequence and recursively calculating a local trajectory; then calculating a shaft alignment bounding box in a directed bounding box of the robot, screening grid units in the shaft alignment bounding box, comparing the height of a machine body with the allowable height of grids, and rejecting collision trajectories to obtain a feasible trajectory set; and finally selecting an optimal track by the evaluation function, extracting a control value and sending the control value to hardware for execution. According to the method, the 2.5 D local obstacle map containing height information is constructed, the four-dimensional control sampling space is designed, and the robot height self-adaptive adjustment is realized in combination with the collision detection and evaluation function.

The invention relates to a welding gun self-adaptive swing adjusting system and method. The system comprises a detection module, a control module, an execution module, a man-machine interaction module, a power module and a storage module. The detection module detects welding seam unevenness information, and after receiving the information, the control module judges whether to drive the execution module to adjust a welding gun to swing or not according to a preset threshold value determined on the basis of the vertical distance between a replaced plate welding initial point and the detection module and the process fluctuation range; meanwhile, a welding seam is tracked through a point-by-point comparison method based on the linear interpolation principle, the moving direction is judged through a deviation function, the feeding direction is determined through a coordinate absolute value and a symbol in a full quadrant, interpolation is stopped when the total step length is gradually decreased to zero, and the method comprises the steps of module initialization, parameter setting, communication detection, judgment and adjustment and welding seam tracking. The invention aims to solve the problems of poor welding quality, low efficiency and more manual intervention caused by poor welding seam flatness, large gap and high-low misalignment in the welding process.

The utility model provides a calibration device, which is used for calibrating a base of laser annealing equipment, and mainly comprises at least three laser range finders, the laser range finders are arranged above the base, the at least three laser range finders are located at the same horizontal height and are not collinear, and the laser range finders are used for measuring the vertical distance between the laser range finders and the base; the plurality of adjusters are arranged on the edge of the base, and the adjusters are used for adjusting the levelness of the base; and the controller is electrically connected with the laser range finders and the plurality of adjusters respectively, and the controller controls the plurality of adjusters to adjust the levelness of the base based on the at least three vertical distances measured by the at least three laser range finders. The levelness of the base can be monitored in real time based on the laser range finder no matter whether the laser annealing equipment is executing the laser annealing process or not, the levelness of the base is adjusted in real time through the adjuster, the adjusting time of the levelness of the base can be shortened, and the adjusting efficiency can be improved.

The invention discloses an RF-CNN-based power transmission line tree obstacle recognition and positioning method and device and a medium, and belongs to the technical field of image processing, and the method comprises the steps: collecting data through a laser radar system and an RGB image collection device, carrying out the preprocessing of the collected data, carrying out the feature fusion through an RF-CNN model, and carrying out the recognition and positioning of a tree obstacle. And training a multi-task learning model to perform three-dimensional positioning of tree types and tree positions, performing classification through fused feature data in tree identification, identifying different types of trees, positioning the position of each tree in a three-dimensional space, calculating horizontal and vertical distances between the tree and the power transmission line, and evaluating whether the tree forms a tree obstacle risk or not. According to the method, the defects of the prior art in the aspects of tree identification, positioning precision, tree obstacle risk assessment and the like are effectively overcome, the efficiency, precision and reliability of tree obstacle monitoring are improved, and a powerful technical support is provided for intelligent inspection and safety management of a power transmission line.

The invention relates to the field of power transmission line risk hidden danger monitoring, and provides an unmanned aerial vehicle wire crossing intelligent detection method and system fused with real-time atmospheric compensation, and the method comprises the steps: measuring an atmospheric extinction coefficient in real time, and obtaining a flight path parameter perpendicular to the axial direction of a wire; synchronously collecting multi-source sensing data to generate an observation data set; generating a lead initial point cloud with a credibility label through feature extraction and Bayesian confidence weight; generating a lead complete three-dimensional track based on a catenary equation and a locust optimization algorithm; generating three-dimensional wire space structure data with sub-meter precision by taking the track point as a control point; and calculating an actual vertical distance based on the elevation difference value and generating a crossing identification report. The system comprises a data acquisition module, a multi-source data acquisition module, a point cloud generation module, a catenary parameter optimization module, a three-dimensional structure optimization module and a safety evaluation report module. According to the invention, through real-time atmospheric compensation and dynamic weight fusion, the detection precision and robustness are improved, and the method is suitable for power transmission line inspection in a complex environment.

The utility model relates to the technical field of edible mushroom planting frames, in particular to a multi-layer three-dimensional edible mushroom planting frame which comprises four vertical rods arranged vertically, a plurality of sliding grooves formed in the vertical rods in the height direction of the vertical rods are formed in the vertical rods, fixing frames are fixedly installed at the bottoms and the tops of the four vertical rods, and the fixing frames are arranged in the sliding grooves. A plurality of bracket assemblies are arranged on the vertical rod, each bracket assembly comprises a left sliding strip and a right sliding strip which are symmetrical to each other, the sliding strips are located in the sliding grooves and are in sliding connection with the sliding grooves, a front reinforcing supporting rod and a rear reinforcing supporting rod which are symmetrical to each other are fixedly installed between the two sliding strips, and a plurality of clamping grooves arranged at equal intervals are formed in the sliding strips; the side edge portions and the tops of the clamping grooves communicate with the outside, and carrying rods are clamped and matched in the two clamping grooves which are right opposite to each other in the left-right direction. The vertical distance can be conveniently adjusted, strain planting is facilitated, and using is more convenient and faster.

A system may include a cable tensioning system, comprising: a first support structure having a first securement point; a second support structure spaced from the first end pile and having a second securement point; a third support structure positioned between the first support structure and the second support structure, the third support structure having a cable support; and a cable extending between the first support structure and the second support structure having a tension value, wherein the tension value corresponds to at least one environmental factor related to where the system is geographically located, and a maximum possible vertical distance from the cable at the first securement point to a low point along a length of cable between the first securement point and the second securement point.

The utility model belongs to the technical field of paper manufacturing, and particularly relates to a paper coating device which comprises a machine base, and a liquid containing groove, a transfer roller, a first rubber roller, a second rubber roller and a first height adjusting assembly are arranged on the machine base. The liquid containing tank is used for containing coating liquid; the transfer roller is rotationally arranged above the liquid containing tank, and the lower part of the transfer roller is immersed in the coating liquid in the liquid containing tank; the first rubber roller is arranged above the transfer roller and is attached to the peripheral surface of the transfer roller; the second rubber roller is arranged above the first rubber roller, and a paper passing gap is formed between the second rubber roller and the first rubber roller and allows paper to pass through; the first height adjusting assembly is used for adjusting the vertical distance between the liquid containing tank and the transfer roller. The vertical distance between the liquid containing groove and the transfer roller is adjusted through the first height adjusting assembly, so that the height of the transfer roller immersed in liquid in the liquid containing groove basically meets the requirement, the height is not too large or too small, and waste is reduced.

The method comprises the following steps that a paint nozzle and a distance measuring device are installed at the tail end of the mechanical arm, and an assembly at least comprises a set of distance measuring devices with adjustable distance measuring directions; determining a reference time source, and stamping reference timestamps for all ranging data; before paint spraying or during operation, a distance measuring device scans the surface of a front workpiece to obtain front distance measuring data, and the shape change trend of the surface of the workpiece is predicted in combination with a reference timestamp and the moving speed of a mechanical arm; the distance measuring device measures the vertical distance between the nozzle and the surface of the workpiece in real time to obtain center distance measuring data. And generating a control instruction based on the two types of data, dynamically adjusting the tail end position, speed and / or posture of the mechanical arm, and maintaining the preset vertical distance and / or angle between the nozzle and the surface of the workpiece. Dynamic distance measurement, interference resistance, foresight prediction and real-time regulation and control are integrated, and high-quality automatic paint spraying operation on non-specific workpieces through the mechanical arm can be achieved.

The invention relates to a conducting bar shell cutting device and method, the cutting device comprises a driving mechanism, a cutting blade and a guide block, and the driving mechanism is movably arranged and comprises a rotating shaft capable of rotating around the axis of the rotating shaft; the cutting blade is fixed on the rotating shaft and is provided with a cutting part for cutting the conducting bar; a guide block is arranged on the rotating shaft in the mode that the guide block can rotate around the axis of the rotating shaft, the guide block is relatively fixed in the axial direction of the rotating shaft, the guide block and the cutting blade are arranged in a spaced mode in the axial direction of the rotating shaft, and the peripheral side of the guide block is provided with an abutting face. The abutting face is in a circular ring shape with the axis of the rotating shaft as the center line. The vertical distance between the outer edge of the cutting part and the axis of the rotating shaft is larger than the vertical distance between the abutting surface and the axis of the rotating shaft. The cutting operation is simple and can be completed at a time, and the conducting bar does not need to be adjusted or fixed again.

The invention discloses a near-ground distance measurement method based on virtual large baseline four-eye vision, a medium and equipment, and the method comprises the steps: synchronously obtaining four images when a lifting appliance enters a near-ground operation range; based on the calibration relation between the cameras, the high-altitude images are respectively projected and transformed to the visual angles of the corresponding lifting appliance cameras and fused, two virtual camera images are generated, and therefore a virtual large base line far exceeding the physical distance is constructed; performing three-dimensional correction and cutting on the virtual image pair to obtain a row-aligned three-dimensional image pair; performing feature matching and triangulation on the virtual image pair to generate a sparse reference depth map; and inputting the stereo image pair and the sparse depth map into a pre-trained depth estimation neural network model together, outputting a dense depth map, and converting the dense depth map into a coordinate system taking the lifting appliance as an original point to obtain a vertical distance. According to the invention, the ultra-large baseline is virtually synthesized by using the existing camera, the remote distance measurement precision is improved, the cost is low, and the reliability is high.

The invention discloses a high-precision measurement method for internal gaps and infinitesimal displacement of a closed area based on magnetic-force-sound coupling. The high-precision measurement method comprises the following steps that (1) a sensor module is installed at the tail end of an automatic scanning mechanical arm; (2) controlling the automatic scanning mechanical arm to move, so that the sensor module is close to the surface of the detected material, thereby detecting the magnetic acting force between the magnetic force detection probe (3) and the detected material, and calculating the vertical distance between the magnetic force detection probe (3) and the surface of the detected material; 3) synchronously measuring the film thickness T on the surface of the measured material by using an ultrasonic detection probe; and 4) based on the vertical distance between the magnetic detection probe (3) and the surface of the detected material and the thickness T of the film on the surface of the detected material, calculating the micro-gap between the film and the surface of the detected material. The detection signal is not influenced by factors such as environment temperature and material heat conductivity difference, and existence and specific size of the gap can be accurately detected.

The invention relates to the technical field of robots, in particular to a head structure and a robot, and solves the problem that the head structure cannot reduce the damage probability of a cable while having three active degrees of freedom of pitching, head swinging and head shaking. The head structure comprises a head body, at least two first driving assemblies, a rotating assembly and a head shaking driving assembly, the first driving assemblies are used for driving the head body to pitch and swing, the head shaking driving assembly and the rotating assembly are used for driving the head body to shake, and therefore three active freedom degrees of pitching, head swinging and head shaking of the head structure are achieved. Besides, the rotating assembly rotates around the first axis and comprises a first through hole, the vertical distance between the center line of the first through hole and the first axis is smaller than a first preset distance, and a cable of the first driving assembly penetrates through the first through hole and passes through the position near the first axis, so that the head structure does not generate friction with the cable as much as possible when shaking the head; therefore, the probability of cable damage is reduced.

The invention discloses an inner diameter measuring method, device and equipment based on 3D modeling and a storage medium, belongs to the technical field of industrial detection, and aims at solving the technical problems that when the inner diameter of a pipe hole is manually detected, the labor intensity is large, errors are likely to be generated, and results are difficult to trace. The method mainly comprises the following steps: acquiring the distance from a probe to a pipe wall, a rotating angle and a moving distance which are acquired in real time in the process that an inner diameter measuring sensor rotatably exits from a pipe hole; converting the data into a three-dimensional point cloud data set; calculating an axis coordinate set corresponding to the three-dimensional circular tube model based on the point cloud data; calculating the vertical distance from each point in the point cloud to the axis to obtain the radius in the pipe, and judging whether the inner diameter is normal or not according to preset standard parameters. The invention further discloses a corresponding device for implementing the method, electronic equipment and a computer readable storage medium. According to the technical scheme, automatic, high-precision and high-efficiency measurement of the inner diameter of the pipe hole can be achieved, and a traditional manual detection mode is effectively replaced.

The invention discloses an antenna signal calibration method, and relates to unmanned equipment and remote control equipment with a display unit which are in communication connection. During two-dimensional plane movement, the remote control equipment and the unmanned equipment detect and display the real-time antenna angle, the remote control equipment or the antenna is swung, and the unmanned equipment drives the antenna to swing, so that the antennas of the remote control equipment and the unmanned equipment are calibrated in parallel; during three-dimensional space movement, the unmanned equipment records the difference between the vertical distances at the initial moment and the to-be-calibrated moment and the horizontal distance between the to-be-calibrated moment and the remote control equipment and sends the difference to the remote control equipment; the remote control equipment calculates and displays the pitch angle at the moment to be calibrated; the remote control equipment and the unmanned equipment detect and display the real-time antenna angle, and the remote control equipment compares the initial antenna angle with the pitch angle to obtain and display the swing angle; the remote control equipment sends a swing angle, the unmanned equipment drives the antenna to swing, and the remote control equipment or the antenna is swung, so that the two antennas are calibrated in parallel. According to the invention, the antenna signal calibration precision and the signal transmission quality can be improved.

The invention relates to the technical field of building models, in particular to a BIM-based building construction drawing design model construction method. The method comprises the following steps: extracting three-dimensional space coordinates and construction attributes of a component from a preset BIM building design model, wherein the construction attributes comprise layered material information of the component and the material thickness of each layer; projecting the three-dimensional space coordinates of the component to a two-dimensional view plane to generate a two-dimensional projection contour; calculating the vertical distance from the component to the view plane, and determining the display level of the component according to the size of the vertical distance; and identifying a construction node position on the two-dimensional projection contour, matching the construction node position with the construction attribute, and generating a detailed drawing index mark at the construction node position according to a matching result. According to the space distribution and the sideline direction of the blank area, the size marking lines are automatically generated, the reasonable spacing is kept, and the problems of shielding and overlapping are avoided.

The invention relates to a ship loader operation control optimization method, device and equipment and a medium, and relates to the field of ship loading control, and the method comprises the steps: determining a cabin three-dimensional center coordinate corresponding to a target cabin according to laser radar point cloud data corresponding to the target cabin; when it is detected that the front-back inclination angle or the left-right inclination angle is larger than a preset angle threshold value or the vertical distance is smaller than a preset safety distance, a preset blanking point correction model is adopted to update the first blanking datum point according to the front-back inclination angle, the left-right inclination angle and the static offset correction amount of the first blanking datum point so as to determine a second blanking datum point; a cart walking mechanism in the ship loader is driven to horizontally move along the wharf ground and / or the rotation angle of a cantilever in the ship loader is adjusted till a chute tube in the ship loader is aligned with the second blanking datum point, and the target bulk cargo continues to be loaded to the target ship; and the steps are repeated until loading of the target ship is completed. According to the ship loading device, stable and efficient ship loading operation can be kept under the complex operation working conditions.

The invention relates to the technical field of computer vision, and discloses a personnel positioning method and device based on monocular vision, equipment and a storage medium, which are used for reducing the hardware deployment cost of personnel positioning and improving the personnel positioning accuracy. The monocular vision-based personnel positioning method comprises the following steps of: estimating depth information by utilizing a depth detection model, and determining an actual vertical distance from a ground contact point to a monocular camera and an actual horizontal distance of a horizontal point pair; fitting the depth information and the actual vertical distance through a polynomial regression equation so as to determine a vertical coordinate mapping relation of the pixel coordinates in a camera reference coordinate system; determining a horizontal coordinate mapping relation according to the actual horizontal distance of the horizontal point pair and the pixel pitch of the horizontal point pair; and determining target positioning information through a coordinate system conversion matrix between the working position and the correction position in combination with the vertical coordinate mapping relation, the horizontal coordinate mapping relation and the relative position information.

The utility model provides an impeller press-fitting device of a double-press structure, which comprises an upper press head and a lower press head which are oppositely arranged, the upper press head is provided with a displacement sensor I and a displacement sensor II, the vertical distance between the mounting positions of the displacement sensor I and the displacement sensor II is a known constant h, and the known constant h is equal to the known constant h. The lower pressing head is used for supporting the lower end of the rotating shaft and applying upward pre-tightening force F, and the upper pressing head is used for driving the impeller to move downwards so that the impeller and the rotating shaft can be subjected to press fitting; the first displacement sensor is used for detecting the vertical distance H1 from the installation position of the impeller to the upper surface of the impeller when the impeller is pressed, and the second displacement sensor is used for detecting the vertical distance H2 from the installation position of the impeller to the upper datum plane of the shell when the impeller is pressed. The finally obtained impeller press-fitting height is not affected by dimensional tolerance and assembly tolerance of related parts, so that products with high press-fitting consistency can be obtained, and the performance consistency of electronic water pump finished products is guaranteed.

The embodiment of the invention provides an intelligent alarm method and device for tumble monitoring, and the method achieves the effective protection of the privacy of a user through the innovative design of a low-position visual angle collection mechanism, the setting of the installation height of a camera not exceeding the knee joint, and the starting of collection only during the abnormal motion. A detection mechanism based on a human skeleton model is constructed, and an accurate fall judgment strategy is established by combining multi-part vertical distance analysis and motion state parameters. An intelligent alarm mechanism is introduced, and quick response of an emergency contact person is realized through key video packaging and emergency channel establishment. According to the method, while the privacy of the user is protected, the defects of the traditional technology in the aspects of data acquisition, tumble detection, alarm response and the like are effectively overcome, and the practicability and reliability of tumble monitoring are remarkably improved.

The invention provides a rock burst prevention and control measure evaluation method and device and a medium, and the method comprises the steps: obtaining prevention and control measure data which comprises a prevention and control measure implementation engineering drawing and various monitoring data; in the simulation software, a three-dimensional model conforming to an actual mine is established, geological parameters and control measure data of underground rock mass of the mine are input, dynamic numerical analysis is conducted through the simulation software, numerical simulation results are obtained, and the numerical simulation results at least comprise a stress concentration coefficient and the vertical distance between a stress concentration area and a roadway; acquiring micro-seismic monitoring data within a preset time period after implementation of the prevention and control measures; and judging the effect of the rock burst prevention and control measure according to the stress concentration coefficient, the vertical distance between the stress concentration area and the roadway and the micro-seismic monitoring data. The method solves the problem of limitation of evaluating rock burst prevention and control measures by a single index in the prior art.

The invention relates to a hole bottom sediment thickness adaptive direction measurement method for irregular hole shapes. The method comprises the following steps: acquiring hole wall images and vertical distance data in multiple directions; image preprocessing is carried out, hole wall feature points are extracted, three-dimensional coordinates are converted, a dynamic three-dimensional model is fitted, deformation grades are divided, and an inclination angle is determined; preferentially distributing detection points in a serious deformation area, calculating an optimal angle, monitoring by a gyroscope, correcting by an electromagnetic damper, adjusting by a servo motor, and ensuring that an included angle between a probe axis and a hole bottom tangent line is compliant; transmitting multi-frequency ultrasonic waves according to deformation grades, analyzing reflected signals through wavelet transformation, extracting sediment layering characteristics, and calculating the distance from a probe to a layering surface through speed correction; the reference distance is calculated based on the reference coordinates, the sediment total thickness and the dense layer thickness are finally obtained, and the measurement method which is adaptive to hole wall deformation, eliminates interference, dynamically adjusts detection parameters and is accurate in reference positioning can meet the high-precision requirement of engineering for sediment thickness and compactness quantification.

The invention relates to the technical field of unmanned aerial vehicles, and discloses a method for displaying the relative position between an unmanned aerial vehicle and unmanned aerial vehicle detection countering equipment, and the method comprises the steps: obtaining the first position information of a target unmanned aerial vehicle and the second position information of the unmanned aerial vehicle detection countering equipment; determining a horizontal distance and a vertical distance between the target unmanned aerial vehicle and the unmanned aerial vehicle detection countering device according to the first position information and the second position information; a first coordinate system is established with the position of the unmanned aerial vehicle detection countering device as a reference position, the first position of the schematic diagram of the target unmanned aerial vehicle in the first coordinate system is determined, and the abscissa and the ordinate of the first position are the horizontal distance and the vertical distance respectively; and displaying the first coordinate system and displaying the schematic diagram of the target unmanned aerial vehicle at a first position in the first coordinate system. According to the invention, the relative position between the target unmanned aerial vehicle and the unmanned aerial vehicle detection countering device can be visually reflected through the two-dimensional view.

The invention provides a high-precision calculation method for weighing a farm feed tower under a wind load condition, and belongs to the technical field of weight calculation methods. The method specifically comprises the following steps that the dead weight of a feed tower, the total weight after feed is added and the static supporting force of each supporting leg are determined; the wind direction is measured, and the supporting legs are divided into a windward group and a leeward group according to the vertical symmetry plane, perpendicular to the wind direction, of the center of the material tower; respectively calculating the vertical distance from each supporting leg of the windward group and the leeward group to the symmetry plane, calculating the wind load force and the upsetting moment by combining the wind speed to establish a supporting leg counter-force mathematical model under the wind load, and obtaining the dynamic supporting force of each supporting leg; superposing the static supporting force and the dynamic supporting force of each supporting leg to obtain an estimated supporting force of each supporting leg; the estimated supporting force of each supporting leg under the wind load and the supporting force, measured in real time, of each supporting leg are used for conducting filtering calculation to obtain accurate dynamic supporting force of the wind load; and deducting the accurate wind load dynamic supporting force and the dead weight of the feed tower to obtain the actual accurate weight of the feed.

A hydrofoil arrangement for a boat includes a fastening device, first and second rigid elements, and a main hydrofoil. The fastening device is fastened on an outside of a hull below a waterline of the resting boat. The first rigid element pivots in a first pivot plane into and out of engagement with the hull, vertical and parallel to a forward direction. The second rigid element is connected to the first rigid element and extends at an angle to the first rigid element so that a second end of the second rigid element is at a vertical distance from the hull. The main hydrofoil is fastened to the second end of the second rigid element. The first rigid element can be pivoted downwards and backwards, and thereafter upwards and further backwards, to a position where its second end is arranged stern of the hull. A method is also described.

An aircraft includes a rotary wing comprising a main rotor and a tail rotor, a drive unit configured to rotate the rotary wing, an information acquirer for acquiring position information of an obstacle relative to the aircraft, a display, and a controller including at least one processor and at least one memory coupled to the processor. The processor executes processing including deriving a direction, a horizontal distance, and a vertical distance of the obstacle with respect to the aircraft, based on the position information of the obstacle, determining, for one or both of the main rotor and the tail rotor, whether the direction, the horizontal distance, and the vertical distance satisfy a first distance condition, and displaying an index corresponding to the vertical distance at a display position on the display when the first distance condition is satisfied, the display position being identified by the direction and the horizontal distance.

The invention discloses an electrode stem straightness detection method based on point cloud, and relates to the technical field of machine vision and automatic detection, and the method comprises the steps: collecting and fusing multi-frame point cloud data through combining a line laser camera and a manipulator with a hand-eye calibration technology, and generating a complete electrode stem three-dimensional model. After preprocessing, an improved PointNet + + network is adopted for segmentation, and foreground point cloud of the electrode stem is extracted from a complex background; carrying out the principal component analysis of the foreground point cloud to correct the attitude, carrying out the projection to generate a depth map, carrying out the binarization processing, extracting central axis scatter points, and carrying out the fitting of an ideal reference straight line through a least square method; and a pair of parallel containing lines containing all axis scatter points and having the minimum distance are determined according to an interphase criterion by adopting a minimum containing area method, and the vertical distance of the parallel containing lines is the final straightness error. According to the invention, non-contact and automatic detection is realized, the detection precision and efficiency are better than those of a traditional scheme, and the real-time quality inspection requirement of industrial online production can be met.

The application provides a kind of double camera three-stage frog jump test method and system based on computer vision, belong to visual identification technical field. Including: build three-stage frog jump test site, by take-off line is divided into area for preparation area and long jump area, the preparation area and long jump area same side are equipped with one camera respectively;Image captured by camera is regionally calibrated and distortion corrected;Tester enters test area, starts test;Preparation area camera real-time acquisition test image, real-time judge whether there is take-off violation;Tester takes off, start long jump area camera, long jump area camera real-time acquisition test image, judge whether there is jump incoherence violation;Calculate the score of non-violation test, obtain the landing point after removing distortion and take-off line, the vertical distance between the corrected landing point and take-off line is the actual long jump distance. The application unifies the detection standard, reduces the consideration participation guarantee test accuracy and fairness.