70results about How to "Improve positioning success rate" patented technology

This invention discloses a method and a system for positioning switching between the indoor and the outdoor, a terminal and a positioning application platform, which relate to the mobile Internet field. The method comprises steps of collecting quantity of GPS visible satellites and RSSI of WIFI accessing points, reporting the GPS visible satellite quantity and RSSI of WIFI accessing points to a positioning application platform in order to provide convenience to the positioning application platform to determine what environment the terminal is positioned (outdoor environment, indoor environment and shielding environment) by combining the report information, choosing the corresponding positioning mode according to the environment where the terminal is positioned, and starting positioning by the terminal according to the positioning mode chosen by the positioning application platform. This invention realizes seamless switching between the indoor positioning and the outdoor positioning and improves the positioning success rate when the indoor environment or the outdoor environment changes.

The invention discloses a method for extracting typhoon objective forecast information from a numerical forecasting product. The method includes the steps of firstly, determining a forecasting position of a typhoon center of a typhoon forecast field; secondly, determining the air pressure forecasting position of the typhoon center of the typhoon forecast field according to a sea level pressure field, determining a vortex forecasting position of the typhoon center of the typhoon forecast field according to a 850 hPa vortex field, and determining the forecasting position of the typhoon center of the typhoon forecast field according to the vortex forecasting position of the typhoon center of the typhoon forecast field by comprehensively considering the 850 hPa vortex field, a 850 hPa wind field and the sea level pressure field of the typhoon forecast field; thirdly, extracting typhoon strength forecast information according to the forecasting position of the typhoon center of the typhoon forecast field. The method has the advantages that the forecasting position of the typhoon center can be automatically extracted, accuracy is high, and the typhoon strength forecast information can be more accurately extracted.

The present invention provides a method for long-term maintaining the target connection state of a pseudo base station for 4G detection and control, which is characterized in that: a positioning device is used as a pseudo base station, and after a designated UE is allowed to reside on the positioning device, the positioning device is used to locate the designated UE, including continuously repeating at the designated Before the UE connection times out, modify the tracking area code TAC of the positioning device to trigger a tracking area update request, thereby maintaining the connection process and supporting unlimited time to obtain the precise location of the target during the process of locating the specified UE. The object of the present invention is to solve the problem of the designated UE being disconnected in the above process, solve the time limit caused by the number of TAUs in the positioning process, and improve the positioning success rate.

The invention discloses an array sound source positioning method based on signal-to-noise ratios of frequency points and offset soft judgment. A sound source signal is collected through a microphone array; the sound source signal is divided into single-frame signals in a time domain; the single-frame signals are converted into frequency domain signals through windowing and discrete Fourier transform; the single-frame signals are continuously segmented into sub-frame signals; the sub-frame signals are converted into frequency domain signals through the windowing and discrete Fourier transform;the signal-to-noise ratios of the frequency points are calculated and mapped into offset soft judgment values; corrected controllable response power values of candidate positions are calculated; and the candidate position with the maximum controllable response power value is estimated as a sound source position. The array is composed of microphones, so that three-dimensional positioning is realized; the signal-to-noise ratio is estimated for each frequency point of the whole frequency band; direct positioning is carried out without considering a time delay difference between the time of reaching the two microphones by a sound source, and a Sigmoid function is used for increasing an offset to realize soft correction; the specific frequency points are restrained by reference to the signal-to-noise ratios; prior information of the signal statistical property is not needed, and a noise power spectrum does not need to be estimated by using data of mute frames; the method is suitable for anenvironment with relatively quick noise transformation; the indexes including a positioning success rate and a root-mean-square error (RMSE) are better; and the positioning success rate is obviously improved in medium and low-signal-to-noise ratio environments, and the algorithm robustness is better.

The invention discloses a robot multi-camera visual inertia point-line feature positioning method and device. The method comprises the steps of obtaining a priori three-dimensional map of a current scene, and enabling the map to be constructed in advance; acquiring a current image of a robot and measurement data of an inertial sensor; matching the two-dimensional point and line features detected in the current image with the three-dimensional point and line features in the prior three-dimensional map; and calculating the yaw angle and translation of the current robot pose according to the twopairs of matched two-dimensional to three-dimensional point features or one pair of point features plus one pair of line features. At present, the main application fields of mobile robots are warehouse logistics, inspection monitoring and the like, and the requirements of the mobile robots on the robots are that the mobile robots can stably operate for a long time in a relatively fixed environmentand can realize accurate self-positioning. A visual sensor is low in production cost and large in acquired information amount, and related positioning methods are widely researched and applied.

The present invention provides an answer sheet image correction method and device, a readable storage medium and an electronic device. The method comprises: obtaining a template answer card image filecomprising a template answer card image and location frame information, wherein the location frame information comprises sizes of location frames and positions of the location frames in the templateanswer card image, and identifying target content selected by each location frame in the template answer card image; obtaining an answer card image, matching the answer card image and the template answer card image, determining positions of the location frames on the answer card image, and identifying content selected by the location frames on the answer card image; and if content selected by eachlocation frame is not the same as the selected target content by each location frame, sending prompting information to prompt recording of location point position information; and receiving recordedlocation point position information, obtaining positions of special contents, being the same as the target content, on the answer card image according to the location point position information, and realizing location of the answer card image. The correction efficiency is improved.

The invention discloses an implementation method of mobile phone third party positioning based on a BREW platform. A positioning system comprises a mobile phone, a network, a universal positioning management platform and a position service application platform; and a high pass GPSOne positioning technology in a CDMA network is adopted for positioning. In the third party positioning, a positioning request is initiated by the universal positioning management platform, and the positioning calculation process is implemented on the mobile phone. The mobile phone position information is transmitted to the universal positioning management platform through a CDMA network data channel or a short-term channel after being acquired. Compared with the traditional GPSOne third party implementation method, the implementation method provided by the invention greatly improves the positioning speed and positioning success rate.

The application relates to a positioning method and device. The method comprises the following steps: acquiring first positioning information transmitted by at least two positioning modules of different positioning modes at a point to be positioned; and matching the first positioning information with second positioning information corresponding to a position pre-stored in a pre-storing positioning data fingerprint database to determine positions corresponding to the positioning modes, and acquiring the position of the point to be positioned according to the positions corresponding to the positioning modes. The point to be positioned is positioned through the at least two positioning modules of different positioning modes, thereby solving the problem of low accuracy in positioning of the point to be positioned according to a single positioning mode in the prior art.

The invention discloses a positioning method and device for a household electrical appliance, and a server. The method comprises the steps: obtaining the current operation state of the household electrical appliance; determining a target positioning mode corresponding to the current operation state; and carrying out the positioning of the household electrical appliance according to the target positioning mode. Through the arrangement of a plurality of different positioning modes, the household electrical appliance in different operation states is positioned through different positioning modes. Even if the household electrical appliance is not positioned through one positioning mode, the household electrical appliance can be positioned again through one positioning mode corresponding to another operation state when the household electrical appliance operates at the operation state, thereby achieving the positioning of the household electrical appliance through the combination of the plurality of positioning modes, avoiding positioning failure caused by a single positioning mode, achieving the accurate positioning of the household electrical appliance, improving the positioning success rate, and solving a technical problem that a single positioning mode in the prior art causes the lower positioning success rate of the household electrical appliance.

The invention provides a robot positioning method and device, electronic equipment and a storage medium, and belongs to the technical field of robots. The method comprises: when the robot is not located at a preset pile point, controlling the positioning device to perform repositioning; when the repositioning fails, controlling an acquisition device to acquire a first image of the surrounding environment and displaying the first image; when a selection operation of selecting an identification area in a preset map based on the first image is detected, controlling the positioning device to perform repositioning in the identification area; and when the repositioning is successful in the identification area, determining the re-determined position as the current position of the robot. The frequency of map reconstruction can be reduced, so that the frequency of map reconstruction is reduced, and manpower and material resources are saved.

The invention relates to a road traffic event positioning method, a system, readable storage medium and equipment, and belongs to the traffic technology field. Initial road name information and eventlocation description information of a traffic event are acquired from the acquired recorded information of the traffic event. The event location description information comprises the initial road nameinformation and first location information, and by searching the word segmentation sequence of the first location information and the initial road name information in a preset word segmentation database, corresponding word segmentation index data and road name index data can be acquired, and in addition, a first positioning position where the traffic event occurs can be determined by using the mutual relation between the word segmentation index data and the road name index data. The positioning way is suitable for a road linear reference method or a relative position reference method, and canbe used to analyze and locate the recorded information of the road traffic events, and is capable of guaranteeing that the positioning position is in the road area, and therefore the positioning success rate of the road traffic events can be improved.