1184 results about "Indoor positioning system" patented technology

A method for indoor navigation in a venue derives positioning of a mobile device based on sounds captured by the microphone of the mobile device from the ambient environment. It is particularly suited to operate on smartphones, where the sounds are captured using microphone that captures sounds in a frequency range of human hearing. The method determines a position of the mobile device in the venue based on identification of the audio signal, monitors the position of the mobile device, and generates a position based alert on an output device of the mobile device when the position of the mobile device is within a pre-determined position associated with the position based alert.

The present invention relates to systems, methods, and devices for consumers using RFID-tagged items for multichannel shopping using smartphones, tablets, and indoor navigation, preservation of consumer's privacy related to RFID-tagged items that they leave a retail store with, and automatically reading and locating retail inventory without directly using store labor. Robots and aerial mobile automated RFID reading devices are disclosed.

The invention discloses a mobile robot indoor positioning system based on an infrared road sign. The system is structurally characterized in that: a dot matrix road sign is manufactured by using an infrared emitting diode and is adhered to an indoor ceiling; a wide-angle infrared camera is fixed on the body of a mobile robot to shoot the infrared road sign upwards; and a computer on the body of the robot performs image analysis and calculates out the position and pose of the robot in real time. The positioning system disclosed by the invention can be used for the positioning of the mobile robot at indoor places with a relatively large range, and has the characteristics of fast calculation speed, high positioning accuracy and strong anti-interference performance.

The invention provides a new indoor accurate positioning system based on a RFID technology. The system is shown in a figure 1 and mainly comprises components, such as RFID reader-writers, RFID reference tags, RFID track tags, and the like, and a user can obtain corresponding positioning service by connecting a personal intelligent device to a wireless local area network. The system uses wireless signal intensity as a positioning reference, the tags are communicated with the reader-writers by radio waves, and each reader-writer can read and record the signal intensity of all tags at set intervals. A certain reference tags at known positions are used as reference points, and the signal intensity of the track tags are compared with the signal intensity of the reference tags by the positioning method according to the signal intensity characteristics of the reference points so as to obtain more accurate position information of the track tags.

The invention relates to the technical field of four-rotor aircrafts, in particular to a small four-rotor aircraft control system and method based on an airborne sensor. The small four-rotor aircraft control system based on the airborne sensor comprises an inertia measurement unit module, a microprocessor, an electronic speed controller, an ultrasonic sensor, an optical flow sensor, a camera, a wireless module and a DC brushless motor. By merging the information of a light and low-cost airborne sensor system, the six-DOF flight attitude of the aircraft is estimated in real time, and a closed-loop control strategy comprising inner-loop attitude control and outer-ring position control is designed. Under the environment without a GPS or an indoor positioning system, flight path control and aircraft formation control based on the leader followed strategy over the rotorcraft are achieved through the airborne sensor system and the microprocessor, wherein the flight path control comprises autonomous vertical take-off and landing, indoor accurate positioning, autonomous hovering and autonomous flight path point tracking. According to the small four-rotor aircraft control system and method, a reliable, accurate and low-cost control strategy is provided for achieving autonomous flight of the rotorcraft.

The invention discloses a high-precision three-dimensional real scene indoor and outdoor integrated positioning method and device. The method comprises the steps that the GPS positioning result is introduced to the indoor, multiple reference points of which the GPS coordinates are measurable are selected in the indoor, and a platform coordinate system is established with the reference points acting as the origins of coordinates; a laser three-dimensional scanner is introduced to the reference points so that indoor three-dimensional point cloud information is acquired, and high-precision indoor scene reconstruction is completed; an optimized coordinate transformation model is constructed according to the relationship between the platform coordinate system and a scanner coordinate system to unify the point cloud to the platform coordinate system; and coordinate transformation is further performed on an ultra-wideband indoor positioning system coordinate system and the coordinate data so that indoor target positioning is completed. The beneficial effects of the positioning method and device are that the point cloud data are introduced on the basis of the indoor positioning system, the high-precision visual indoor three-dimensional scene with geodetic coordinates is obtained by using the optimized coordinate transformation model, and the indoor positioning precision can be the decimeter level; and integration of indoor and outdoor positioning can be realized, and a browsable spatial information management system is provided.

The invention relates to a positioning method and a terminal. The method comprises the following steps of: judging whether the terminal is in an indoor environment or not; and when the terminal is in the indoor environment, positioning the indoor height of the terminal by a first positioning mode and/or positioning the indoor level of the terminal by a second positioning mode. The indoor height of the terminal is positioned by a pneumatic height gauge or an air pressure gauge and/or the indoor level of the terminal is positioned in combination with a height positioning result. By the two positioning modes, the problem of different requirements on height, the positioning accuracy of a horizontal plane and positioning delay time in indoor navigation positioning service is solved, positioning accuracy is enhanced, positioning delay time is shortened, user experience of indoor navigation positioning is improved and various application requirements of indoor navigation positioning and the like are met.

The invention discloses a method for identifying a walking mode and tracing a track of a pedestrian in a room. The method comprises the steps: firstly, defining a walking mode of the pedestrian in the room by using directions and speeds as the classifying basis according to the characteristic of a terrain under an indoor environment; then establishing a mathematical modeling for the indoor walking mode by applying a hidden Markov model (HMM) through using acquired acceleration sensor and geomagnetic sensor data; because of the interference of a metal object and the influence of body joggling in the walking process, a track primarily obtained by an indoor positioning system through dead reckoning possibly has large errors, and in the method, calculating the probability of each walking mode by using a viterbi algorithm of the HMM, and finding one group of walking modes with highest possibility; finally, matching an original location to a corresponding walking mode according to an identification result of the walking mode so as to correct an original track, and obtain a walking correcting track of the pedestrian in the room. According to the method, the precision of indoor positioning and track tracing can be remarkably improved.

The system relates to an indoor positioning method, an indoor positioning apparatus and an indoor positioning system. The method comprises the steps of taking an indoor picture; acquiring characteristic information of an image of an LED light source according to the picture; taking at least preset number of communication images of the LED light source at a speed of a preset frame to acquire identification information uniquely corresponding to the LED light source; determining a position of a picture-taking spot in relative to the LED light source according to the characteristic information corresponding to the LED light source and an image-forming principle; determining an indoor position of the LED light source according to the identification information of the LED light source and an indoor layout diagram; and acquiring the indoor position of the picture-taking spot according to the indoor position of the LED light source and the position of the picture-taking spot in relative to the LED light source. Electromagnetic interference can be prevented because the indoor positioning method is in no need of installing wireless signal transmitting device. The indoor positioning system for realizing the indoor positioning method is simpler in structure and lower in cost.

The invention discloses an indoor navigation method including: locating a user and a target location by the aid of the location technique based on marker recognition; finding out the shortest route from the user current location to a parking place according to the routing algorithm; and computing the direction and the displacement of a user by the aid of an internal sensor of an intelligent terminal during user movement, so that real-time tracking of the user location is completed. The invention further discloses an indoor navigation system, a navigation client-side system and the intelligent terminal. Based on marker recognition and by combining direction and acceleration sensor data for locating and navigation, the method and the systems are high in precision, low in cost and insusceptible to external signals.

The invention discloses an indoor positioning system and method based on Bluetooth and MEMS (Micro-Electro-Mechanical Systems) fusion. A particle filter for Bluetooth/MEMS fusion positioning is designed, usable information of two subsystems is sufficiently utilized, wherein a Bluetooth system matches and acquires information of a user on line after off-line database building, and an MEMS combined system acquires position prediction information of the user through course angle calculation and dynamic step length estimation; an extended Kalman approximate particle filter is taken as a fusion navigation filter, user position information data of the two subsystems are fused, a state equation and an observation equation are constructed by reasonably selecting the state variable and the observational variable, finally, the optimal user position information is obtained, and indoor accurate positioning is realized. Through Bluetooth/MEMS indoor fusion positioning, the defects that a conventional indoor positioning system is low in positioning accuracy, the equipment cost is high, the coverage range is narrow, the positioning continuity is poor and the like can be overcome.

The invention discloses a Wi-Fi (Wireless Fidelity)-based indoor positioning system and a Wi-Fi (Wireless Fidelity)-based indoor positioning method. The positioning system comprises a positioning server, a local area network, a plurality of first wireless APs (Access Points), a plurality of known-position second wireless APs and a mobile terminal to be positioned. According to the system, the first wireless APs are adopted to position the mobile terminal, and the second wireless APs are used for amending a positioned result; according to an amending method, the existing K nearest neighbor (KNN) points obtained by a KNN method are subjected to selection, distances from the mobile terminal to be positioned to the wireless APs of fixed positions are obtained by adopting an RSSI (Received Signal Strength Indicator) ranging manner, and the KNN points are selected by using the distances. The system and the method have the advantages that the adopted APs of the fixed positions have the maximum received signal strength and are less affected by environmental factors, such as wall bodies, so that the measurement error is reduced, and the positioning is more accurate.

The invention discloses a mobile auxiliary indoor positioning method and a mobile auxiliary indoor positioning system based on a smart phone platform. For the mobile auxiliary indoor positioning method and the mobile auxiliary indoor positioning system, the position of a user in a room is located by establishing a fingerprint database and a mobile database. The positioning method comprises the following steps of: after receiving a positioning request sent by a user, collecting RSSI (received signal strength indicator) fingerprints of the position of the user according to the positioning request, matching the RSSI fingerprints with RSSI fingerprints in the fingerprint database, and returning a set containing candidate positions with fixed quantity according to the matching result; according to data in the mobile data, the information of moving information and moving distance of the user, calculating the candidate positions in the set containing the candidate positions with the fixed quantity as the probability of the position of the user, so as to obtain the position of the user. Compared with the traditional indoor positioning method, the mobile auxiliary indoor positioning and the mobile auxiliary indoor positioning system have the advantages of high positioning precision and small maximum error, and can continuously and accurately positioning in a positioning process in real time.

The invention discloses a geomagnetic indoor positioning system and method based on a self-adaptive particle filter algorithm. The geomagnetic indoor positioning system comprises the novel self-adaptive particle filter algorithm and an efficient geomagnetic fingerprint data collecting unit. The efficient geomagnetic fingerprint data collecting unit has the main function of quickly collecting indoor geomagnetic signals by using a mobile phone magnetometer and converting the indoor geomagnetic signals into a geomagnetic fingerprint model to be stored. The novel self-adaptive particle filter algorithm is the improvement to an existing filter algorithm to improve the robustness, the precision and the usability. The key technology of the self-adaptive particle filter improvement algorithm mainly comprises a self-adaptive behavior model, a novel measurement model, a self-adaptive resampling model and a positioning precision estimation and positioning failure detection model. The geomagnetic indoor positioning system is suitable for various smart phones integrated with acceleration sensors, gyroscopes and magnetometers. The geomagnetic indoor positioning system has the advantages that the facing directions, the placing positions and using of the smart phones are not limited, and positioning precision is high.

The invention discloses a wearable personnel gait-detection indoor-positioning system and a method therefor. The wearable personnel gait-detection indoor-positioning system comprises attitude sensors, a data acquisition device, a data transmission unit and a data processing unit. The attitude sensors are installed respectively at leg parts and the waist part of a user. A first input end of the data acquisition device is connected to the attitude sensors. A second input end of the data acquisition device is connected to a correction module. The data transmission unit and the data processing unit are orderly connected to an output end of the data acquisition device. The data acquisition device acquires data measured by the attitude sensors. The data transmission unit transmits the acquired data to the data processing unit. The data processing unit carries out data synthesis processing to obtain attitude angles of the corresponding parts, carries out gait detection according to the attitude angles, acquires walk step length and a walk direction according to leg and waist length parameters of the user, and carries out vector superposition of the walk step length and the walk direction to obtain user positions in the room. The wearable personnel gait-detection indoor-positioning system and the method can simultaneously realize gait detection and positioning and has high positioning precision.

A method, including: receiving, at an apparatus, first and second radio signals from a first location; discriminating the first and second radio signals, in order to estimate a bearing from the first location; and estimating, using the bearing and constraint information which is independent of the radio signals, a position of the apparatus.

The invention discloses a construction method for a fingerprint database in a WiFi indoor positioning system, and belongs to the technical field of indoor wireless communication and networks. The method comprises the steps that original signal intensity RSSI is acquired on reference points; then RSSI data are preprocessed; selection of excellent APs is performed by the preprocessed data; then excellent AP signal intensity characteristics of each reference point are extracted; integrity of AP signal intensity is detected; compensation of signal intensity is performed on the reference points with missing data through detection; reference point signal intensity which is not acquired is reckoned; and finally the fingerprint database is generated. According to the method, influence of indoor environment on signal intensity is considered, and the propagation law of signal intensity is fully utilized so that the problems that the conventional fingerprint database construction process is high in acquisition workload and fingerprint information is incomplete can be solved. Field acquisition cost of the construction phase of the fingerprint database is reduced and redundant APs with fuzzy distinguishing of position points are eliminated under the condition that accuracy of the fingerprint database is not reduced so that storage space of the fingerprint database is reduced.

The invention provides a UWB based three-dimensional indoor positioning system which relates to the wireless communication network positioning technology field and comprises a label fixedly attached on a positioning target, at least four base stations fixedly arranged indoors with their coordinates known and a positioning terminal. Through the use of label polling and communication within the base stations for two-way ranging, the clock synchronization problem required between the label and the base stations can be avoided; and since the distances from the label to the base stations are packaged and transmitted to the positioning terminal, the complexity and cost of the positioning system are reduced greatly. The operation for the positioning data are placed on a computer, which greatly reduces the burden of a single-chip microcomputer and enables smaller positioning delays. The utilization of the amplitude limit weight recursion mean value filtering algorithm can process the obtained three-dimensional coordinates respectively so as to achieve higher positioning accuracy.

The invention provides an indoor positioning navigation method. The indoor positioning navigation method comprises the following steps: acquiring an image shot by a user; positioning the user who shoots the image according to the image; calculating view angle shooting information of the user according to the image and acquiring the destination of the user and an indoor map corresponding to the destination of the user; and generating an indoor navigation map according to the position of the user, the view angle shooting information of the user, the destination of the user and the indoor map corresponding to the destination of the user, and displaying the view angle shooting information of the user on the indoor navigation map. According to the indoor positioning navigation method, characteristic information in the shot image is acquired without dependence on markers arranged in advance, so that the user can realize positioning and navigation in an unfamiliar or complex indoor environment through the shot image, and the user also clearly knows the own orientation in the indoor environment through the view angle of the shot image under a condition that the user is disoriented.

The invention discloses an indoor positioning method based on a distributed AP selection strategy. The method comprises the following steps of using mobile equipment to collect k times of signal intensities of AP nodes on each reference point and processing data; equally dividing a target area into m subareas, classifying fingerprint information of the different subareas, using a fingerprint information base to train a subarea module and selecting the corresponding subarea according to RSS fingerprint information; calculating a correlation of each AP node and each subarea, sorting correlation coefficients, selecting the AP node whose correlation coefficient is greater than Ptau as a positioning node of the subarea; in each subarea, taking the selected positioning node as input of a DBN model and a corresponding position point as output of the DBN model, training the DBN model and constructing a positioning prediction model. By using the method, big noise and the AP node with a weak position distinguishing capability can be effectively removed; positioning precision of an overall WIFI indoor positioning system is increased and algorithm operation time is shortened.

The invention disclose an indoor positioning system and an indoor positioning method based on three-dimensional multipoint wireless and micro-inertia navigation as well as an expansion type indoor control system. The indoor positioning system comprises a calibration device and a sensing device, wherein the calibration device comprises at least three first wireless transceiver units used for sending signals at intervals of first preset time; and the sensing device comprises an inertia sensing unit, a second wireless transceiver unit and a processing unit, wherein the inertia sensing unit is used for sensing the motion of a target object, the second wireless transceiver unit is used for producing a response signal when receiving the signal transmitted by each first wireless transceiver unit, and the processing unit is used for respectively calculating a first space coordinate of the target object according to the motion of the target object sensed by the inertia sensing unit, calculating a second space coordinate of the target object according to the response signal, and combining and processing the first space coordinate and the second space coordinate to obtain the final space coordinate of the target object. With the adoption of technical schemes of the indoor positioning system and the indoor positioning method, the positioning accuracy is high, and the motion response of the target object is sensitive, and the response rate achieves the millimeter.

The invention provides an indoor and outdoor fusion navigation parking system and method. The system is composed of a central server, a group of parking lot servers and a user mobile terminal arranged on a vehicle. The central server comprises a communication and business processing module. Each parking lot server comprises vehicle positioning, data management and communication modules. The user mobile terminal comprises outdoor navigation, indoor navigation, decision and communication modules. The central server acquires real-time parking place information of each parking lot so as to provide the available parking lot information near the destination for the vehicle; and the vehicle arrives at the selected available parking lot entrance according to the outdoor navigation, switches to the indoor navigation mode, receives the vehicle position transmitted by the parking lot server and a parking lot real-time map including the available parking place information, plans the vehicle driving path to perform navigation and arrives at the parking place. "Navigation" and "parking" are associated so that the efficiency and the convenience of the parking system can be enhanced.