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 reducing power consumption of a GPS (Global Positioning System). The method comprises the following steps of obtaining information of a related cell base station by the GPS and further obtaining position information of a current base station by accessing a cloud server; acquiring satellite-correlated data of current position according to the position information, thereby realizing quick acquisition of the satellite-correlated data; on the other hand, receiving a signal of a radio controlled clock (BPC) and restoring an accurate clock, thereby shortening positioning time of a GPS receiver; and finally, judging the position where the current receiver is positioned by calculating signal-noise-ratio data and further controlling a switching strategy of a receiver GPS module. By using the method for reducing the power consumption of the GPS, the time for successfully positioning a GPS chip is greatly shortened, thereby correspondingly reducing the consumption of electric energy.

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 a robot vision inertial point linear feature positioning method and device. The robot vision inertial point linear feature positioning method comprises the steps that a priorithree-dimensional map of a current scene and measuring data of an inertial sensor are obtained, and the priori three-dimensional map is constructed in advance and comprises the three-dimensional pointlinear feature; and a current image of a robot and measuring data of an inertial sensor are obtained. According to the robot vision inertial point linear feature positioning method and device, fusionof multiple sensors is utilized, advantage information of all the sensors are fully exerted in an algorithm, and the effect of improving the position accuracy and robustness is finally achieved.

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 provides a single-camera navigation image-based inspection detector positioning method and belongs to the technical field of aerospace. According to the method, a plurality of coordinatesystems are defined; the coordinates of a certain navigation camera photography center in an inspector zero-position coordinate system and the image plane rectangular coordinates of an image point ina navigation image which is corresponding to a feature point in the navigation image are obtained, so that the coordinates of the point in the zero-position coordinate system, a body coordinate system and an inspection coordinate system are obtained; and the coordinates of the origin of the inspector body coordinate system under the inspection coordinate system are obtained according to the deviation quantity of the origin of the zero-position coordinate system and the photography center, and the deviation quantity of the origin of the body coordinate system and the origin of the zero-position coordinate system under the inspection coordinate system, so that final positioning is realized. With the single-camera navigation image-based inspection detector positioning method provided by theinvention adopted, high-precision positioning can be realized with two control points even when one navigation camera fails, and therefore, the method depends on fewer initial conditions.

The invention discloses a repositioning method and a repositioning device in a centralized cooperative SlAM, which are applied to a centralized cooperative SLAM system comprising a server and at leastone client, and the method comprises the following steps: acquiring a to-be-positioned key frame in the current client under the condition that the current client loses positioning, positioning the to-be-positioned key frame based on each key frame in the key frame database of the current client; and under the condition of positioning failure, judging whether the current client has a combined mapin the target map or not, if so, selecting a preset number of key frames in the combined map, and sending the preset number of key frames to the current client, so that the current client performs repositioning based on the preset number of key frames to be positioned. In the above process, after positioning based on the client fails, the preset number of key frames are continuously selected fromthe server and sent to the client, so that the client performs repositioning based on the preset number of key frames, and the probability of successful positioning is improved.

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.

The invention discloses an arterial-puncture positioning assisting device. The arterial-puncture positioning assisting device comprises a shell and a detecting structure, wherein the detecting structure comprises a positioning rod fixedly connected at the bottom of the shell, a fixing pressing block is slidingly arranged on sliding grooves in the two sides of the positioning rod, limiting assemblies are arranged between the sliding grooves and the fixing pressing block, and a puncture through groove is formed in one long edge of the fixing pressing block; a V-shaped groove is formed in the bottom of the positioning rod, a laser lamp is arranged at the groove bottom of the V-shaped groove, vibrating sensors are arranged at the bottoms of all the side walls of the V-shaped groove, and pulsereminding modules are correspondingly embedded into the groove balls of the V-shaped groove in the corresponding positions of all the vibrating sensors. The arterial-puncture positioning assisting device is simple in structure and convenient and fast in operation, the two vibrating sensors are simultaneously used for detecting arterial pulse signals, when arterial pulse signals with large intensity are detected through the two vibrating sensors, arteries between the two vibrating sensors are puncture parts, projection points between the two vibrating sensors of the laser lamp are striking puncture points, and the arterial positioning success rate is increased.

The invention relates to a traffic scheduling method and device for a positioning platform. The method comprises the following steps: detecting the positioning request amount of each priority service specific to the positioning platform in real time; computing the capability real-time occupancy rate of the positioning platform; judging whether or not to start dynamic scheduling according to the request amount of each priority service specific to the positioning platform or the capability real-time occupancy rate of the positioning platform; comparing the capability real-time occupancy rate of the positioning platform with the positioning request threshold value of each priority service in response to the start of the dynamic scheduling; and when the real-time occupancy rate reaches the positioning request threshold value of a certain priority service, accepting positioning requests higher than the priority service, limiting positioning requests lower than the priority service, and determining a positioning request amount capable of accepting the priority service according to the maximum positioning processing capability of the positioning platform, the positioning request threshold value of the priority service and positioning request amounts higher than the priority service. Through the adoption of the traffic scheduling method and device, the positioning success rate of low priority services is increased.

The invention provides a radiation source direct positioning method based on a global narrowband model under a sparse Bayesian framework, and belongs to the technical field of radiation source positioning. The radiation source direct positioning method comprises the following steps of 1, carrying out sparse modeling on the global array reception data; 2, carrying out posterior updating on the signal statistical parameters; and 3, solving the model parameters. The method is suitable for the condition that a radiation source signal has a narrowband characteristic for a global array composed of all base stations, only the angle information of the signal is needed in processing, and the reception synchronization does not need to be carried out on all the stations. Compared with a traditional positioning method, the radiation source direct positioning method provided by the invention does not need to carry out data association and does not need to know the number of information sources, andcompared with a sparse positioning method, the method provided by the invention can obtain a higher positioning success probability.