31results about How to "Positioning data is accurate" patented technology

The invention discloses a bridge inspection method comprising the following steps: S10, establishing a three-dimensional map of a detected bridge; S20, erecting a base station and controlling an unmanned aerial vehicle manually to plan corresponding inspection routes for all parts of the detected bridge; S30, after completion of inspection route planning of all parts of the detected bridge, loading a corresponding inspection route for a flight control module to control the unmanned aerial vehicle to carry out automatic inspection; S40, collecting, processing, and managing data sent by the unmanned aerial vehicle in an automatic inspection working process by a ground station and detecting defects existing in the detected bridge; and S50, locating the defects existing in the detected bridgeaccording to the data received by the ground station in the automatic inspection working process of the unmanned aerial vehicle. Therefore, technical problems that the automation degree is low, the workload is large, the stability of the acquired data is poor, and the safety is low because the existing UAV bridge inspection mode mainly relies on the manual operation for bridge surface data collection by the UAV are solved.

The invention discloses a mobile robot positioning method and system based on instance segmentation and multi-sensor fusion, and a medium. The method comprises the following steps: carrying out target instance segmentation on a camera image; extracting and tracking feature points of the segmented image; calculating a depth value of the feature point and carrying out pose calculation by using an EPnP algorithm; carrying out pose calculation based on IMU pre-integration; selecting an updating mode of the pose initial value according to the instance segmentation information and the feature point extraction condition; and enabling the visual sensor and the IMU to be subjected to tight coupling pose optimization, and obtaining an accurate pose. According to the method, the instance segmentation information of the image is acquired, the static feature points in the complex environment are selected as the reference, the pose state of the robot is estimated, and the IMU can be switched to update the positioning initial value information when the camera positioning is not ideal, so that the positioning of the robot also has accuracy and robustness in a highly dynamic environment.

The invention belongs to the technical field of dangerous goods transportation safety detection and discloses a dangerous goods transportation safety detection method and a system thereof. The systemcomprises a video monitoring module, a temperature detection module, a pressure detection module, a central control module, a wireless communication module, a positioning module, an environment identification module, an alarm module, a fire extinguishing module and a storage module. On the basis of detecting the shape of the dangerous goods itself and surrounding environment requirements by the environment identification module, surrounding environment factors which affect the safety of the dangerous goods are detected; then, according to the shape of the dangerous goods itself and the surrounding environment requirements and the surrounding environment factors which affect the safety of the dangerous goods, the safety level of the dangerous goods surrounding environment is compared and judged, the surrounding environment in the case of dangerous goods transportation is recognized, the environment surrounding the dangerous goods can be effectively identified, and guarantee is providedfor safety transportation of the dangerous goods; and through the alarm module and the fire extinguishing module, quick fire extinguishing can be carried out, and accident losses are reduced.

The invention relates to a method and a device for processing projection calibration information on the basis of information feedback. The method includes the steps of 1) adjusting a projector and a projection screen to locate at preset positions and directions, then executing the step 2); 2) calibrating a projected image by a main controller, adjusting edges and integration borders to enable the image to be fit with the screen, and then executing the step 3); 3) acquiring specific information about the projected image by a camera, and the like. The device for processing projection calibration information on the basis of information feedback comprises the main controller, the projector, the camera, the projection screen and a user terminal. The main controller is connected with the projector, the camera and the user terminal respectively, and the projector and the camera are arranged in alignment to the projection screen. Compared with the prior art, the method and the device have the advantages that cost is lower, operation is more convenient, and positioning data is more accurate and the like.

The invention discloses a control device for a ground transport vehicle. The device comprises an ultrasonic automatic following receiving system and an AGV system; the ultrasonic automatic following receiving system is fixed to a ceiling of a needed indoor space, the AGV system can move on the ground of a warehouse, the ultrasonic automatic following receiving system comprises multiple single ultrasonic receiving systems, the AGV system comprises multiple single AGV systems, and the ultrasonic automatic following receiving system can receive signals of ultrasonic sending system ultrasonic sending units in the AGV system. Accordingly, the phenomena of errors caused by wave loss and limitation of a blind area can be avoided, the positioning range of each ultrasonic receiving system is wider,positioning data is more accurate, and the reliability is high; a vehicle-mounted display screen can display the location, speed and local obstacle information in real time; meanwhile, an obstacle avoidance system is adopted, and the error-tolerant rate is increased; the whole system performance is stable, and the running cost and maintenance cost are low.

The invention discloses a GPS drift data filtering method and system, and a terminal. The method comprises: acquiring GPS positioning data, searching for a WIFI hotspot and storing the hotspot; and correcting positioning data according to the change of the acquired WIFI hotspot. Because the GPS data are corrected by using the WIFI hotspot, when a user carries a GPS filter terminal and moves in anenvironment with a WIFI signal, short-distance GPS drift data can be filtered, so that the accuracy of positioning data is improved.

The invention discloses a vehicle positioning data acquisition method and device, vehicle-mounted equipment and a storage medium, and the method comprises the steps: receiving the positioning data ofa vehicle, and detecting whether the vehicle is in a driving state or not; when the vehicle is in the driving state, judging whether the driving state of the vehicle is abnormal or not according to the positioning data; when the driving state of the vehicle is abnormal, filtering the positioning data; and when the driving state of the vehicle is not abnormal, sending the positioning data to a server. According to the method provided by the invention, relatively accurate positioning data can be obtained so that a vehicle driving track formed by the obtained positioning data subsequently does not have a drifting phenomenon and the driving track is smooth and accurate.

The invention relates to a method for selecting global positioning system (GPS) positioning and base station positioning during store visit. The method comprises the following steps of: judging whether the GPS positioning of a handheld terminal is valid or not at first, if the GPS positioning of the handheld terminal is valid, preferably selecting GPS positioning data as valid positioning data and storing the GPS positioning data in a data base, otherwise, selecting base station positioning data as valid positioning data and storing the base station positioning data in the data base; and when the position information of a target store is valid, comparing the distance between a base station positioning position and the position of the target store with the distance between a GPS positioning position and the position of the target store, selecting the shorter distance as the valid positioning data and storing the valid positioning data in the data base. Therefore, by the method, more accurate positioning data can be acquired, the accuracy of store visit tracks is improved, and more valid data is provided for enterprise store management.

The invention discloses a GPS drift data filtering method, system and terminal, comprising: acquiring GPS positioning data, searching for WIFI hotspots and saving them; and correcting the positioning data according to the changes of the acquired WIFI hotspots. Using WIFI hotspots to correct GPS data, when the user carries a GPS filter terminal and moves in an environment with WIFI signals, it can filter short-distance GPS drift data to make the positioning data more accurate.

The present invention relates to a gyroscope-based GPS packet capture time interval determination method during a curve driving process. The method comprises the steps of obtaining the parameters of a gyroscope and a change matrix to calculate the total angular velocity at a vehicle initial position during the curve driving; restarting the gyroscope to eliminate the error of the obtained gyroscope parameter data, and obtaining the horizontal direction angular velocity at the initial position again; carrying out the horizontal correction on the turning angular velocity at the vehicle initial position during the curve driving by the operation of a spatial geometric coordinate system; obtaining the critical value of the sharp turning angular velocity at vehicle turning by a real vehicle experiment and the normal distribution calculation, and gathering and comparing the angular velocity data; analyzing the degree of error between the GPS packet capture time interval and sharp turning data to obtain the packet capture time interval of a GPS minimum error on different angular velocity conditions. The method of the present invention can remind the users to decelerate timely during the driving process, guarantees the curve driving safety, at the same time, enables a mobile phone APP to obtain the positioning data more accurately.

The invention discloses a remote vehicle detection and alarming device, which relates to the detection and alarming device and aims to solve the problem that the conventional vehicle failure checking device cannot detect electronic failures of electrical appliances of a vehicle in real time. The satellite positioning signal input end of a central processing module is connected with the satellite positioning signal output end of a satellite positioning module; the mobile communication signal output and input ends of the central processing module are connected with the mobile communication signal input and output ends of a mobile communication module; a burglary prevention triggering signal output end of a burglar alarm module is connected with the burglary prevention triggering signal input end of the central processing module; and the power supply end of a power supply module is simultaneously connected with the receiving end of the central processing module, the receiving end of the satellite positioning module, the receiving end of the mobile communication module and the receiving end of the burglar alarm module (6). The remote vehicle detection and alarming device has the advantages of vehicle electrical appliance electronic failure real-time detection, high alarming speed, accurate vehicle positioning data and the like, and can be widely applied to various types of vehicles.

The invention relates to a method for locating an unmanned aerial vehicle in a diversion culvert based on single-line laser. The method comprises the steps: step 1, constructing a point cloud model ofa diversion culvert; step 2, acquiring height information and original attitude data acquired by an unmanned aerial vehicle; step 3, obtaining unmanned aerial vehicle position data through a positionobtaining sub-method, and obtaining optimized unmanned aerial vehicle attitude data through an attitude obtaining sub-method; and step 4, obtaining accurate positioning of the unmanned aerial vehiclein the diversion culvert according to the position data of the unmanned aerial vehicle and the optimized attitude data. Compared with the prior art, the method has the advantages of high positioningprecision, high processing speed and the like.

The invention relates to curved surface correction information processing method and device based on a laser locator, wherein the method comprises the following steps: 1) firstly, adjusting projection hardware equipment to locate a projector and projection screen equipment at set positions and directions, and performing step 2); 2) correcting a projection image through a main control machine, adjusting the edge fusion part to enable the image to be tangent to the screen, and performing step 3); 3) locating the specific information of the projection image through the laser locator; 4) judging whether to receive a projection equipment adjusting command through the main control machine, if so, performing step 5); and if not, performing step 7); and 5) adjusting the projection equipment and performing step 6), wherein the device comprises the main control machine, the projector, the laser locator and a projection screen. Compared with the prior art, the method and device disclosed by the invention have the advantages of low cost, convenience in operation and accurate locating data.

The invention discloses an article tracking control method and device based on a mirror cabinet and a readable medium, and the method comprises the steps: obtaining positioning point UWB data of different positioning points in a designated region, and building a positioning relation between the positioning point UWB data of each positioning point in the designated region and the corresponding positioning point; establishing an association relationship between the unique identification code of the tracker installed on the to-be-tracked article and the information of the to-be-tracked article; and obtaining UWB positioning data and Bluetooth positioning data corresponding to the unique identification code of the tracker, and determining positioning information of the to-be-tracked article according to the UWB positioning data, the positioning relationship and the association relationship in response to determining that a first difference value between the Bluetooth positioning data and the UWB positioning data is within a first threshold range, the positioning information comprises to-be-tracked article information and a position in a specified area; and controlling a display screen on the mirror cabinet to display the positioning information of the to-be-tracked article. Therefore, tracking and accurate positioning of the articles can be realized, a good visualization effect is provided, and the articles are more convenient to find in combination with alarm control of the tracker.

The invention discloses a positioning system and positioning method based on multi-sensor data fusion. Encoders and omnidirectional wheels are fixed on encoding disk frames. Main rotation shafts of the omnidirectional wheels are connected with rotation shafts of the encoders. The three encoding disk frames are fixed on a fixing holder. Included angles between vertical planes in which axes of the three encoder rotation shafts are 120 degrees. The three omnidirectional wheels contact with a moving ground at the same time. A three-encoding-disk whole field positioning system is employed, when a mobile robot moves, the three omnidirectional wheels are passively rotated, and robot omnidirectional movement data can be accurately obtained, so the influence that positioning is inaccurate resultingfrom angle drift of a gyroscope is reduced. Change condition of a to-be-positioned robot at three degrees of freedom is obtained through utilization of an updating formula for three encoding disk coordinates, relative positioning is realized, precision of the positioning system when the robot is in a high speed driving state and under different site conditions is improved, and according to the system and the method, in practical operation, relatively accurate positioning data can be obtained for a sudden event or ground condition.

The invention discloses a storage and stacking goods positioning method and device, which are used for accurate positioning of storage and stacking goods. The storage and stacking goods positioning method includes: dividing the target area into a two-dimensional grid according to preset division rules, and selecting reference points on the two-dimensional grid; comparing the first measured coordinates of each reference point with the actual coordinates , obtain the vector error of each of the reference points; obtain the second measurement coordinates of the target goods in the target area, and determine the reference point corresponding to the target goods; Second, the measurement coordinates are corrected to obtain the positioning coordinates of the target goods. By adopting the technical solution of the present invention, the reference point vector compensation is carried out for the measurement and positioning of storage and stacked goods, thereby reducing the positioning error of the goods, improving the monitoring ability of special items such as dangerous chemicals, and eliminating potential safety hazards in the storage and stacking process.

The invention discloses an indoor wireless positioning method and system. The method is characterized by arranging a plurality of fixed anchor nodes indoor, and arranging a mobile node on a target tobe positioned, wherein the mobile node is used for sending a radio-frequency positioning signal to the anchor nodes; obtaining radio frequency signal intensity RSSI received by each anchor node, and carrying out filtering processing on the RSSI; according to the radio frequency signal intensity RSSI obtained after filtering processing, calculating distance value between the mobile node and each anchor node, and comparing the distance values with infrared communication distance and rejecting the distance values, which are not within the infrared communication distance range; according to the distance value between the mobile node and each anchor node and the position of each anchor node, calculating the position of the mobile node within a certain time, and drawing a moving path of the mobile node; according to the moving path of the mobile node, calculating speed [delta]s of the mobile node and correcting the RSSI by utilizing the [delta]s; and calculating the distance between the mobile node and each anchor node by utilizing the corrected RSSI, and based on the calculated distance, determining the position of the mobile node.

The present invention provides a vehicle positioning method, device, electronic equipment, and storage medium. The method includes: collecting acceleration data and angular velocity data of the inertial navigation system of the vehicle at time k; based on the acceleration data and angular velocity data of the inertial navigation system and The updated state variable of the vehicle at time k-1 predicts the state variable of the vehicle at time k, the state variable includes the speed variable and position variable of the vehicle; the observation of the vehicle at time k is determined according to the rolling distance data and map data of the wheel sensor Position: Update the state variable of the vehicle at time k according to the predicted state variable of the vehicle at time k and the determined observed position of the vehicle at time k, and use the updated state variable of the vehicle at time k as the vehicle's position at time k data, k is an integer greater than 1. The method and device provided by the invention realize accurate vehicle positioning.

The invention discloses a method for estimating heading angle deviation between a water surface / an underwater vehicle and a positioning device. Firstly, the vehicle performs directional straight navigation on the water surface or underwater, and at the same time, through self-positioning and positioning by use of the positioning device, discrete registration point data of the vehicle in geodeticcoordinates in the northeast direction can be obtained; self-motion track points of the vehicle and positioning device test data are fitted into straight lines by data fitting, and an angle differencebetween the two straight lines is a heading angle deviation value of the vehicle and the positioning device; multiple tests are performed in the same direction, the average of data of the multiple tests is computed to obtain the heading angle deviation of the direction; the vehicle is controlled to perform straight navigation in different directions, the above steps are repeated to obtain the heading angle deviations of the directions, and if the relative error of the heading angle deviations in the multiple directions is less than 5%, the average of the heading angle deviations in the multiple directions is computed. The method is convenient to operate, the positioning data acquired by the positioning device is more precise, and the method is suitable for various different vehicle navigation environments.