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

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 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 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.