447 results about "Aerial survey" patented technology

The invention discloses a multi-angle unmanned aerial survey system. The multi-angle unmanned aerial survey system is provided with a six-rotor-wing unmanned aerial vehicle, and each multi-view-angle inclined camera composed of five camera lenses is carried on the six-rotor-wing unmanned aerial vehicle. Each multi-view-angle inclined camera comprises a shooting unit, a controlling unit and a hanging unit. The six-rotor-wing unmanned aerial vehicle comprises an unmanned aerial vehicle flying platform system, a GPS, a flying controlling system, a remote sensing shooting system, a ground controlling system and a signal transmitting system. Ground images can be collected at the same time at multiple angles, in this way, the defect that according to a traditional aerial photography technology, shooting can be performed only at a vertical angle is overcome, the actual conditions of a ground feature can be reflected more really, and the defects in orthophotography are overcome; through integrating POS data, DSM data, vectors and others, a three-dimensional model establishing technology based on image intensive matching is established, a digital city model is rapidly and efficiently established, and therefore the working cost for three-dimensional model establishing is greatly lowered.

A method of taking an aerial survey maps boundaries of a first image and a second image from a first plane to a second plane to determine boundaries of an output image in the second plane. For a plurality of pixels in the output image, the method determines a corresponding pixel of either the first image or second image in the first plane.

The invention relates to an unmanned aerial vehicle ribbon-shaped slanted image aerial survey method and system. The unmanned aerial vehicle ribbon-shaped slanted image aerial survey method comprisesthe following steps: acquiring coordinate positions of an aerial survey start point, a corner point and an end point; setting aerial survey parameters and acquiring parameters of a photographing device; generating a ribbon-shaped aerial survey area; determining whether the ribbon-shaped aerial survey area covers a to-be-detected area, and if yes, generating a ribbon-shaped flight route according to the aerial survey parameters, the parameters of the photographing device, the start point, the end point and the ribbon-shaped aerial survey area; and flying according to the ribbon-shaped flight route and a deviation distance, and acquiring an image of the to-be-detected area. As long as the aerial survey parameters are manually set, the ribbon-shaped aerial survey area conforming to the to-be-detected area and the unmanned aerial vehicle flight ribbon-shaped route can be generated, so that the unmanned aerial vehicle can flight according to the set ribbon-shaped route, the complexity of the manual operation can be alleviated, and the data acquisition efficiency and the data processing efficiency can be improved.

The invention provides an unmanned aerial vehicle tilt photography fine grid earthwork measurement method. The aerial survey data are obtained by aerial survey of the unmanned aerial vehicle and the data are integrated and processed so as to obtain a three-dimensional model of a real scene; the model restoration technology is applied to eliminate the interference objects such as trees and houses in the real scene three-dimensional model, the elevation around the pores left after the interference objects are deleted is applied to fit the curved surface, and the pores are filled with the curved surface so that the restored real scene three-dimensional model is finally obtained, and the real surface point cloud is generated based on the restored real scene three-dimensional model; and an irregular triangular network model is constructed according to the point cloud and then a regular grid model is further constructed, and the earthwork calculation value is obtained through a fine grid earthwork measurement formula based on the regular grid model. The accurate calculation of earthwork filling and excavation can be realized based on the fine grid, and the method has the advantages of high accuracy, safe operation and saving manpower and time cost.

The invention provides a method and device for simulating detection efficiency of a calibration detector by adopting a virtual source. The virtual source is used for replacing gas for efficiency calibration, and the efficiency split principle, an collimation conical point source and a virtual point source in a Monte Carlo program and a line source are ingeniously applied to aerial survey Monte Carlo calibration simulation work. The method and device can replace a body source to do the daily calibration work of labs and field instruments, that is, energy calibration and efficiency calibration are achieved through one-time experiment calibration, and therefore calibration work links are reduced, and source purchasing cost is lowered.

The invention discloses a method for directly positioning a ground target by self-checking POS. The method comprises the steps of: according to the ultimate principle of directly positioning ground target, deducing a theory relationship between an error in an image exterior orientation element and an error in a target point measurement, building a POS system error compensation module, guiding the module into a space intersection rigor formula based on a collinear condition, building a strict error compensation module for self-checking POS directly positioning ground target, and then solving a three-dimensional ground coordinate of an additional parameter and a point to be fixed according to the least squares error compensation principle so as to directly position ground target by self-checking POS having the additional parameter. The precision for directly positioning ground target by self-checking POS meets the demand of measuring the detail point of aerial survey topography mapping, avoids building a specific checking field to check required by using the POS system, decreases the technical difficulty of aerial photograph, saves the measuring cost of aerial photograph and provides a method for decreasing the vertical parallax for rebuilding a three-dimensional model.

The invention discloses a spliced large area array digital aerial camera, which comprises a full color camera module and a multispectral camera module, wherein the full color camera module comprises a full color camera objective lens, a reflective pyramid beam splitting prism and four full color charge coupled devices (CCDs); and the multispectral camera module comprises four multispectral objective lenses and a CCD; the full color camera objective lens is positioned in the middle, and the four multispectral objective lenses and the CCD are symmetrically arranged at the periphery of the full color camera objective lens; the rear of the full color camera objective lens is provided with the reflective pyramid beam splitting prism; and the periphery of the reflective pyramid beam splitting prism is provided with the four full color CCDs. By the camera, the problem that a digital aerial camera has small breadth is solved, and a 20k*20k large-breadth high-resolution aerial image is provided; the camera comprises wide-angle, middle-angle and normal-angle full color camera objective lenses and multispectral objective lenses; and during work, the full color camera objective lenses at different angles can be flexibly selected according to different mapping applications, the angles of the multispectral objective lenses are matched with those of the full color camera objective lenses, and the problem that the conventional area array digital aerial camera has small field of view and single objective lens type is solved. Meanwhile, due to a mode of splicing a single full color objective lens and multiple full color CCDs, the image splicing difference caused by exposure difference of various full color cameras in the mode of splicing the multispectral objective lenses and the multiple CCDs is avoided.

The invention discloses a highway reorganization and expansion surveying method and relates to the fields of surveying and mapping and highway engineering design. The method comprises the following steps of: laying a ground target control point, and acquiring a three-dimensional space coordinate; performing vehicle-mounted movable laser scanning measurement, and acquiring a vehicle-mounted measured original data result; taking the three-dimensional space coordinate of the ground target control point as a reference, performing data processing on vehicle-mounted point cloud in the vehicle-mounted measured original data result, and acquiring a high-precision vehicle-mounted ground point cloud; establishing a first triangulation network for the high-precision vehicle-mounted ground point cloud, and generating a highway pavement digital elevation model; performing survey area vehicle-mounted LIDAR aerial survey, and acquiring a vehicle-mounted measured original data result; acquiring a digital elevation model and a high-precision central pile cross section map by using a 1:2000 measuring scale according to the vehicle-mounted measured original data result; and taking the vehicle-mounted measured original data result as the basis, and manufacturing digital line graphs by using the 1:2000 measuring scale in a respective 300m range on two sides of the highway by integrating the vehicle-mounted ground point cloud and digital aerial photos.

The invention relates to a two dimensional calibrating device of a digital aerial survey camera and a calibrating method thereof; the two dimensional calibrating device consists of an internal azimuth instrument, a computer, the aerial survey camera to be detected and a collimated light tube; the internal azimuth instrument is a two dimensional fine internal azimuth instrument and mainly includes a fixing frame of a detected system, a pitch axis, an azimuth axis and two axle tables; the aerial survey camera to be detected is arranged in the fixing frame of the detected system of the internal azimuth instrument; the collimated light tube is arranged in front of the aerial survey camera to be detected; in the calibrating process, the computer controls the rotation of the pitch axis and the azimuth axis of the internal azimuth instrument by driving a controlling device; collects the data outputted by the coders arranged in the pitch axis and the azimuth axis; carries out image point location collection on the aerial survey camera to be detected through an image collecting card; the computer calibrates the internal orientation elements and aberrances in the aerial survey camera to be detected by utilizing the collected angle values of the pitch and the azimuth coders and the pixel coordinate of the corresponding image point and through a mathematical model. The two dimensional calibrating device of the digital aerial survey camera and the calibrating method thereof of the invention realizes the accurate calibrating of the digital aerial survey camera with large field coverage and large area array; moreover, the calibrating device is simple and has high calibrating precision.

The invention discloses an integrated real-time correction system for atmosphere convection layer and ionized layer radio wave refraction errors, which comprises a microwave radiometer, a single-station GPS (Global Positioning System) and an integrated real-time correction unit, wherein the microwave radiometer is used for detecting a convection layer refractivity profile; the single-station GPS is used for detecting an ionized layer electron density profile in real time; and the integrated real-time correction unit is used for calculating radio wave refraction error corrections in real time by adopting a ray tracing method based on the convection layer refractivity profile, the ionized layer electron density profile and the apparent distance and the apparent elevation angle parameter of a detection target, wherein the radio wave refraction error corrections comprise a distance error correction, an elevation angle error correction and a speed error correction. The integrated real-time correction device for atmosphere convection layer and ionized layer radio wave refraction errors overcomes the defect that the parameters of a convection layer and an ionized layer cannot be simultaneously detected by adopting the traditional method, realizes the real-time correction of the radio wave refraction errors of the convection layer and the ionized layer, has the advantages of high accuracy, good real-time performance, unattended operation, strong mobility, low cost, simplicity in operation and the like, and provides a technical support for improving the accuracy of systems for aerial survey, deep-space survey, ballistic trajectory measurement and the like in China.

The invention discloses a three-dimensional real scene modeling method based on aerial survey of an unmanned aerial vehicle. The three-dimensional live-action modeling method based on aerial survey ofthe unmanned aerial vehicle comprises the following steps that 1, three-dimensional live-action modeling is carried out, aerial survey data are obtained through aerial survey of an unmanned aerial vehicle, image analysis is conducted through an aerial triangular analysis method, a series of two-dimensional aerial images are converted into three-dimensional dense point clouds of the to-be-measuredconstructional engineering, then data post-processing is conducted, a digital line drawing map and a digital surface model of the to-be-measured constructional engineering are obtained, and a live-action three-dimensional model is obtained; performing live-action patrol of the to-be-tested constructional engineering based on the live-action three-dimensional model and real surface point cloud toobtain construction execution data of the to-be-tested constructional engineering; and based on comparison of the three-dimensional planning design and construction execution data of the to-be-testedconstructional engineering, researching and issuing a construction scheduling instruction, and checking and correcting the execution effect of the scheduling instruction. The three-dimensional real scene modeling method based on aerial survey of the unmanned aerial vehicle is high in efficiency and low in cost.

The invention discloses a building texture extraction method based on a UAV low-altitude aerial survey system. The method comprises the first step of automatic registration between a building contour line and an image, the second step of semi-automatic registration between the building contour line and the image on the basis of multi-view image linear matching, the third step of building facade texture extraction and the fourth step of building facade texture geometric correction. The building texture extraction method has the advantages that the method for automatic registration between the building contour line and the image is provided for solving the problem that registration is not achieved between a vector line and an image during building texture mapping; in consideration of the complexity that the mapping relation between a building space contour line and the image linear feature is built in multiple images, the image linear feature semi-automatic matching strategy based on multi-view geometric constraints is provided.

The invention relates to the technical field of aerial survey and especially relates to a system and a method for measuring line sag height based on an unmanned aerial vehicle. The system for measuring line sag height based on an unmanned aerial vehicle comprises a rotor unmanned aerial vehicle, a digital camera, a ground control station, a microwave emitter, a microwave reception antenna, a data line and a computer measurement system. The rotor unmanned aerial vehicle is provided with the digital camera and the microwave emitter. The digital camera is connected to the microwave emitter by a flying control panel of the rotor unmanned aerial vehicle. The computer measurement system is installed in the ground control station. A computer serial interface of the ground control station is connected to the microwave reception antenna by the data line. The rotor unmanned aerial vehicle does not need a special-purpose rising-landing runway, has strong place adaptability and is especially suitable for height measurement on engineering in an area having complex landform conditions. The system saves time and labor and has high measurement efficiency. Through use of the rotor unmanned aerial vehicle, safety is high and the damage on people is avoided.

The invention relates to the field of the aerial photogrammetry of the unmanned aerial vehicle and in particular relates to a device for determining the exposure moment of an aerial survey camera in the unmanned aerial vehicle. The device comprises an unmanned aerial vehicle flight control system, the aerial survey camera and a GNSS (Global Navigation Satellite System), which are connected sequentially, wherein the unmanned aerial vehicle flight control system generates a first exposure signal according to the preset exposure control information, the aerial survey camera is used for exposing according to the first exposure signal and generating a synchronizing signal simultaneously, and the GNSS system is used for determining the accurate exposure moment of the aerial survey camera according to the synchronizing signal. The invention also relates to a method for accurately determining the exposure moment of the aerial survey camera in the unmanned aerial vehicle. According to the device and the method, the technical problem that the exposure moment of the industrial digital camera is accurately determined is solved, and the accuracy of resolving the elements of exterior orientation of the aerially surveyed photo through post interpolation of data of the GNSS is greatly improved.

The invention belongs to the technical field of unmanned aerial vehicles, in particular relates to a positioning cradle head for performing aerial photogrammetry of an unmanned aerial vehicle and positioning a ground target, and aims to enhance anti-vibration capability, improve control accuracy, enhance fixing torque, improve linearity and reduce weight and size at the same time. The positioning cradle head comprises a cradle head frame structure, a camera moving mechanism and a cradle head elevating mechanism, wherein the movement of a camera is driven by a model airplane steering engine and a circular-arc synchronous belt which is matched with the model airplane steering engine; and transmission of the elevating mechanism is realized by using a lead screw structure. The positioning cradle head has the advantages of high anti-vibration performance, high positioning accuracy, small size and light weight. When the unmanned aerial vehicle is taking off or landing, the cradle head can be accommodated in a ventral, so that air resistance can be reduced and the cradle head and the load of the cradle head can be protected under the situation that the terrain clearance of the ventral of the unmanned aerial vehicle cannot be accurately predicted in taking-off and landing processes.

The invention discloses a measuring method of an airborne single-station passive positioning system on a measure target radiation wavelength. The measuring method comprises the following steps: making an airborne single-station passive probing platform do constant motion along a straight line; firstly, using the receiving front end to process received probing signals; then, sending the received probing signals into a digital signal processing unit; sending signal frequency values obtained through regular detection under the control of a synchronous clock into a memory; and calling the latest three frequency values from the memory by the data processing unit in a mode of automatic or manual commands under the triggering effect of the regular synchronous clock to measure the wavelength of the measured signals. The invention can accurately estimate and obtain the wavelength of the measure target radiation signals through the simple frequency measuring technology, and the measuring method can be applied to the execution of long distance positioning measuring tasks. However, an aerial measuring platform which has simple equipment and can not be supported by a ground measuring system can also be applicable to the monitoring management of aerial radio signals.

The invention provides an automatic modeling method based on oblique photography, and a system and an auxiliary device thereof. The automatic modeling method comprises following steps: planning of a shortest route of an aerial survey region of interest is carried out based on preset route height and overlapping degree information; equipment state information of an unmanned plane and oblique photography equipment of the unmanned plane in aerial survey based on the route is detected; screening of plotting missed areas is carried out based on the equipment state information, replanning of the route is carried out, and aerial survey is carried out until effective aerial survey data covering the aerial survey region of interest is obtained; the aerial survey data is subjected to image correction, texture characteristic matching, per pixel grade dense matching, and aerial triangulation, and a three dimensional plotting model is generated. The automatic modeling method is capable of solving problems such as complex operation process and low intelligent degree in the prior art which are induced because of misunderstanding on the working states of each other.

The invention discloses a ground-air-combined multifunctional high-precision rapid geomagnetic information measuring device and measuring method. The device includes ground earth magnetic field information measuring parts and an aerial suspension type high-precision rapid earth magnetic field information measuring part. The plurality of ground parts are arranged along a measuring line to be used for measuring information such as an earth surface magnetic field, and the aerial suspension type high-precision rapid earth magnetic field information measuring part is loaded on a flying platform and has a certain height from the ground to be used for measuring information such as an aerial earth magnetic field. The ground parts sends measured information to the aerial suspension type high-precision rapid earth magnetic field information measuring part through wireless communication, overall information data measured on the ground and in the air are transmitted to a satellite network through a satellite communication terminal to a ground monitoring query terminal. The ground-air-combined multifunctional high-precision rapid geomagnetic information measuring device provided by the invention has the beneficial effects of high precision, rapidness and high efficiency and multi-parameter measurement in earth magnetic field measurement through ground-air organic combination, combines earth magnetic field measurement, cartographic information and a GIS, has good system intelligence advancement, and has an advantage of long-term measurement of geomagnetic information of a region with complex terrain.

The invention discloses a Microstation v8i-based city rapid-modeling method, which comprises the following steps of: performing an aerial survey on a tested area according to a conventional aerial photogrammetric survey method by adopting an aerial photogrammetric survey system; and 2, performing analysis processing on aerial survey data in a Microstation v8i software environment by using a processor, namely, establishing a three-dimensional aerial photogrammetric survey model, performing land feature classification and marking, correspondingly establishing a land feature type layer-color mapping table, performing vector data acquisition, establishing models of houses, scattered trees and land features of other types respectively, processing all the land features in the tested area respectively, and obtaining three-dimensional geometric models of all the land features in the tested area.

An aerial survey image capture system for a survey aircraft is disclosed. The system comprises a camera system arranged to capture successive images of ground beneath a survey aircraft. The camera system has associated camera parameters, and a loss of separation (LOS) avoidance system for a survey aircraft. The LOS avoidance system is arranged to determine a predicted closest point of approach (CPA) distance between the survey aircraft and the nearby aircraft based on their locations and movements, compare the CPA distance with a defined minimum separation distance corresponding to a LOS and determine an estimate for at least one navigation parameter of the survey aircraft required for the CPA distance to remain above the defined minimum separation distance. The system is further arranged to modify camera system parameters so as to at least partially compensate for a change in survey efficiency when the estimated at least one navigation parameter is used to navigate the survey aircraft.

The embodiment of the present application provides a method and a device for generating an unmanned aerial vehicle route. The method comprises the following steps of: acquiring a rectangular operationarea of the unmanned aerial vehicle, wherein the rectangular operation area comprises a target edge; determining an air strip space value of the unmanned aerial vehicle during operation; extending the target edge of the rectangular operation area such that a length value of the extended target edge is an integer multiple of the air strip space value; and generating an operation route of the unmanned aerial vehicle according to the air strip space value, so that the unmanned aerial vehicle can perform operations such as surveying and mapping according to the operation route. According to the method and the device for generating the unmanned aerial vehicle route, the problems that the aerial survey data of the unmanned aerial vehicle in the prior art in agricultural surveying and mapping service and surveying and mapping related operation is prone to abnormal problems such as loopholes and missing data during later data processing are solved.

The invention discloses an optimization design method for aerial survey parameter of an airborne laser radar. Taking the number of scanning aerial strips as an independent variable and the least scanning time as the target, the method can determine the optimal aerial survey parameter by using the mapping relationship of laser parameters, flight parameters, scanning system parameters and laser foot-point distribution as a constraint condition and meeting the requirements of the aerial survey operation for the laser foot-point distribution density and the actual range of each parameter.

The invention provides a road and building simulation modeling method based on real road surface data, the method comprising the following steps: S10, establishing a road network simulation model by using aerial photograph images; S20, generating building simulation models along the road by aerial survey data, and matching the building simulation models with the road network simulation models; S30, importing the digital elevation model data, so that the simulation model of the road network and the building conforms to the digital elevation model, and simulating the undulation condition of thereal pavement; S40, optimizing the overall appearance ratio of the model with reference to the real image to obtain the final model. According to the idea that the model attribute information groupware is modeled and matched with the space, by means of multi-source data fusion, the road model and the building model along the road are combined and matched with reference to the actual pavement, so that the model can show more details of the pavement, can restore the shape of the real street scene, undulation and other details, and can be better used in driving perspective simulation and other application scenes.

The invention discloses an open-pit mine production dispatching commanding method based on a drone, the method is as follows: firstly using an aerial survey drone to perform orthophoto image acquisition of an open pit mine, and then performing image analysis by an aerial triangle analysis method to convert a series of two dimensional aerial images into three-dimensional dense point cloud of the whole open pit mine, performing specialized data post-processing to obtain a digital line map and a digital surface model of the open pit mine, performing three-dimensional modeling and production planning design of the open pit mine, and performing real-time inspection of the open pit mine based on the digital surface model to master production execution data of the open pit mine; then based on comparison of the three-dimensional planning design and the production execution data of the open pit mine, researching and releasing production scheduling instructions, checking the execution effect ofthe scheduling instructions, and correcting errors. The open-pit mine production dispatching commanding method has the characteristics of combination of thickness and thickness, timeliness and high efficiency of dispatching commanding and has the functions of self-checking correction and continuous improvement of management level.

The invention discloses a laser point cloud radar data-based method for making a cross-section diagram of a power transmission line passage. The method comprises the steps of (1) laser point cloud data preprocessing; (2) point cloud classification of preprocessed data; (3) power transmission line conductor vectorization; (4) power transmission line splicing and bunching; (5) making of a digital elevation model; and (6) making of the cross-section diagram of a power transmission line. The technical problems that the feasibility and precision of making the cross-section diagram of the power transmission line passage in mountainous areas with rugged terrains are relatively poor, the DEM made by adopting the mode of making a contour line through aerial survey or field mapping in the mountainous areas with rugged terrains is relatively poor in precision and the making precision of the cross-section diagram is affected, and the workload of field work is heavy in the prior art are solved.

The invention discloses a method for planning a shortest path of agricultural machinery based on a Dijkstra algorithm, and relates to a method for planning a shortest path. The method comprises the following specific operation steps of: constructing a grid map of an operation area of the agricultural machinery, the grid width being divided according to a vehicle body width; enabling the vehicle body width to be (2i+1) times the grid width according to an accuracy requirement and an actual need; dividing the grid map into a passable state and an impassable state according to unmanned aerial vehicle aerial survey and obstacle distribution fed back by a sensor; and in order to control the diffusion of optimized nodes in a reasonable range, introducing a maximum estimation value K. According to the method provided by the invention, a group of better nodes are selected and the maximum estimation K is introduced to limit the diffusion degree of the group of nodes, and the group of better nodes is taken as a vertex set of the Dijkstra algorithm, so that the search time is reduced, and meanwhile, a found path is guaranteed to be an optimal path rather than a better path.

The invention provides an aerial survey device and method for geomagnetic field intensity. The aerial survey device comprises an aero-model helicopter, a magnetometer and a flight control system, wherein, the flight control system comprises an airborne part and a ground station part; and the airborne part is arranged on the aero-model helicopter body and is wirelessly connected with the ground station part. The aerial survey method comprises the following steps: the flight control system transfers flight status data of the aero-model helicopter, geographic and geomorphic photography data and magnetic survey data from the magnetometer to the ground station control system in real time; and the ground station control system controls the flight height and flight path of the aero-model helicopter according to the received data so that the magnetometer can acquire geomagnetic field intensity data. The contour-chasing high-precision magnetic survey device has the advantages of control capabilities for the contour-chasing flight height as well as hovering and low-speed flight, low cost, high safety, convenient carrying procedure, small overall volume, no need of an airport and auxiliary equipment during the takeoff and landing processes, no need of a pilot and the like.

The invention relates to an underwater photography measurement method for the profile accuracy of a semi-rigid self-resilience reflector and effectively realizes underwater quick detection of the profile accuracy of the reflector by using a digital camera to automatically and quickly measure points to be measured on the underwater reflector and providing the deformation analysis data of the profile accuracy in a zero-gravity environment after the reflector is manufactured. The method comprises the following steps of: firstly, adhering coding points and marking points to the surface of the reflector in a radial mode; and secondly, respectively performing air measurement and underwater photography measurement, performing coordinate system conversion on an object space coordinate which is obtained through the air measurement and the underwater measurement, and thus obtaining the object space coordinate (X3, Y3, Z3) which is measured in air and water under the same coordinate system and obtaining a three-position coordinate difference (dx, dy, dz) of a point position, during the air measurement and the underwater measurement, of each characteristic point on an antenna. The method has the advantages of high measurement speed, high efficiency, low detection cost and high detection accuracy.