42results about "Position fixation" patented technology

A wireless device uses position-indicating data to determine its location in relation to multi-layered wireless networks that the device may see concurrently. If location information is available, the device employs a user-defined priority table to select the order of user-contracted available networks. If location information is unavailable, the device employs a technology learning table to automatically adapt CAI protocol options (e.g., GSM, cdma2000, IS-136, IEEE 802.11x, etc.) to search for an available network. Information is gathered and stored in databases within the device to allow automatic adaptation to multiple wireless networks. The device provides unique access to each wireless network with which a user has contracted, without the intervention of any “anchor” network. This allows the device to obtain network service no matter what network it is traveling through and allows the user to traverse multiple wireless networks with seamless access to multiple applications and services provided by those networks.

The position of a mobile unit (12) within a detection zone is determined. An acoustic signal is emitted from the mobile unit and received along a first path (54). An echo of the signal is received after reflection from a surface (46) within said detection zone. The position of the mobile unit (12) within the detection zone is determined from the times of arrival of the signal and echo.

The present invention provides an industrial machine, which comprises an industrial machine main unit 14, a construction working implement 8 installed on the industrial machine main unit, two cameras 18 and 19 each mounted at a known position with respect to a machine center of the industrial machine main unit, at least three targets 21 being installed on the working implement so that the targets are within visual field of each of the two cameras, and an arithmetic processing device 23 for extracting the images of at least three targets in common to the images from stereo-images taken by the two cameras, for obtaining a three-dimensional position of each target image, and for calculating a position and a posture of the working implement with respect to the industrial machine main unit based on the three-dimensional position obtained.

A method of locating and tracking a cellular terminal (1) is described. The method comprises the detection of one or more handover events that take place when the cellular terminal (1) moves between transmission regions (3) of a cellular terminal network provider. Information regarding the handover events is recorded within a database (4) so that the location of the cellular terminal (1) can be calculated. The calculation of the location of the cellular terminal (1) is achieved by either comparing the information with previously stored data or by extracting information regarding the location and geometry of the individual transmissions regions (3) such that a handover region (9) can be calculated. The precise location and area of the handover regions (9) takes account of various factors including power, time of flight of the transmitted signals and timing synchronization within transmission regions (3) and the effects of shadowing of the transmitted signals.

The invention comprises a method of locating a vehicle, comprising: a) connecting a removable locator device to the vehicle, said locator device automatically noting when it has been connected to the vehicle and then using locating technology to retrieve, at regular intervals, location coordinates for the current location of said locator device, said location coordinates approximating the location of the vehicle; b) sensing a loss of connection between the locator device and the vehicle; c) automatically storing, as a waypoint on the locator device, the last location coordinates retrieved prior to sensing said loss of connection; and, d) removing the locator device from the vehicle to enable use of the locator device to return to the stored waypoint, wherein the stored waypoint represents the approximate location of the vehicle.

The invention discloses a positioning method and a positioning device based on Bluetooth. The method comprises the following steps of: transmitting a power setting instruction to target Bluetooth equipment, wherein the power corresponding to the instruction reduces gradually; obtaining a power threshold value when the target Bluetooth equipment is out of connection; and matching a preset communication distance mapping table according to the power threshold value, if matching, taking the corresponding distance value as the communication distance corresponding to the target Bluetooth equipment. By obtaining the communication distance from the target Bluetooth equipment, the identification error range of the position of the Bluetooth equipment is greatly reduced and the positioning precision is effectively improved.

The invention discloses a master-slave mode multi-UUV cooperative location method based on underwater acoustic communication delay, and relates to a cooperative location method. The method solves the problem of big location errors of a conventional master-slave mode multi-UUV cooperative location system, and comprises the following steps: the master and slave UUVs perform clock synchronization preparation, the master UUV measures the distance between the master UUV and the slave UUV through underwater acoustic ranging; the master UUV sends location information, spacing information and the time stamp during sending information all of the master UUV to the slave UUV through underwater acoustic equipment; delay duration of the underwater acoustic communication is calculated after the slave UUV receives the underwater acoustic of the master UUV, and the state equation of the cooperative location system is built; the slave UUV utilizes the state of the system to transfer the matrix, and the measurement equation of the cooperative location system is built; measurement update of the cooperative location system is completed through utilizing the measurement equation of the system; the state update of the cooperative location system is completed through utilizing the state equation of the system; the slave UUV compensates the state estimation errors. The method is suitable for the master-slave mode multi-UUV cooperative location.

The invention relates to an AOA-based two-dimensional wireless sensor network semi-definite programming positioning method comprising the following steps: assuming that there is no obstruction between a reference node and a target node to be positioned in a wireless sensor network, and measuring the angle of arrival of each signal; converting the angles of arrival of the signals into distance information between the nodes; converting a problem of wireless sensor network target node positioning into a mathematical optimization problem of maximum likelihood estimate MLE and solving the problem, and providing an optimized objective function for subsequent steps; introducing redundant variables to convert the mathematical optimization problem of maximum likelihood estimate MLE into a constrained optimization problem; converting the obtained constrained optimization problem into a semi-definite programming SDP convex optimization problem using a mini-max criterion and a semi-definite relaxation SDR method, and getting an optimal solution, thus completing positioning of the target node. Through the method, the precision of target node positioning is improved.

A method and apparatus for managing movement. A navigation system comprises a first inertial measurement unit enabled global positioning system device having a first inertial measurement unit with a first level of accuracy in a first vehicle and is configured to provide first information that identifies a position of the first vehicle relative to a second vehicle. The navigation system further comprises a second inertial measurement unit enabled global positioning system device in the first vehicle having a second inertial measurement unit with a second level of accuracy that is greater than the first level of accuracy and is configured to provide second information that identifies the position of the first vehicle relative to the second vehicle. The navigation system further comprises a controller that is configured to perform an action based on a desired level of accuracy of the first information.

A drive test locating method and device. The method comprises: determining fixed stop sampling points of a test vehicle in drive test data (101); according to identification information about a serving cell of the fixed stop sampling points of the test vehicle in the drive test data and line information matching with the drive test data, determining location information about the fixed stop sampling points of the test vehicle (102); and according to the line information, determining location information about sampling points operating among the fixed stop sampling points of the test vehicle in the drive test data (103). Thus, locating the sampling points in the drive test data can be completed efficiently and accurately, and the execution cost is low.

Each time mobile communication terminal 10 moves a distance of 150 kilometers, it computes its approximate position by performing a stand-alone position measurement, and stores the approximate position. When mobile communication terminal 10 needs to precisely measure its location it notifies position measurement assist server 30 of the stored approximate position, to thereby perform a GPS position measurement operation by using satellite capturing data transmitted, accordingly, from position measurement assist server 30.

A system and method for location detection is disclosed. The system and method may derive estimates of a user's location by interfacing with other sources of location data. In one aspect of the invention, a client device may determine the user's location by using locally configured location services. The client device may also query a remote server that contains recent geolocation data of the user. Both the local and remote estimates may be presented to a user. The user may also be allowed to select the location that most accurately represents the user's current location.

The invention discloses an intelligent following mobile device, which comprises a mobile body with power drive, a UWB base station, two communication antennas and a shielding cover, wherein the UWB base station is arranged on the mobile body and synchronously steers along with the mobile body and is in wireless signal connection with a UWB signal label arranged on a target tracking object; the twocommunication antennas are arranged on the UWB base station and are used for directionally detecting the orientation of the UWB signal label in a trusted precision detection area of the UWB base station; and the shielding cover is arranged on the UWB base station and is used for shielding wireless signals in an untrusted precision detection area of the UWB base station. When the mobile body is steered, the UWB base station can be driven to synchronously steer, so that the orientation of the UWB signal label relative to the UWB base station can be directionally detected by the two communication antennas of the UWB base station, and the interactive cooperation performance of intelligent following mobile device is improved.

Phase and amplitude deviations, which are generated, for example, by cables connecting an array antenna of a CDMA base station and the base station, are calibrated in the baseband.

The base station comprises: an antenna apparatus 1; couplers 2; an RF unit 3 that converts a receive signal to a baseband signal, converts a transmit signal to a radio frequency, and performs power control; an A/D converter 4 for converting a receive signal to a digital signal; a receive beam form unit 6 that multiplies the receive signal by semi-fixed weight; a despreader 7 for this signal input; a time-space demodulator 8 for demodulating user data; a despreader 9 for probe signal; a space modulator 14 for user data; a spreader 13 for user signal; a channel combiner 12; a Tx calibrater 11 for controlling calibration of a signal; a D/A converter 10; a unit 16 for calculation of correlation matrix for generating a probe signal used for controlling an Rx calibration system and a TX calibration system; a spreader 17 for probe signal; a power control unit 18; a D/A converter 19; an RF unit 20 for probe signal; an A/D converter 21 for signal from the couplers 2; and a despreader 22.

A method and system for determining a location of at least one stationary node of a wireless network, which includes providing a predetermined path within a geographic space of the wireless network, prior to localization, moving a mobile node along the predetermined path, measuring a network parameter with respect to the mobile node as it moves along the predetermined path, and performing a localization scheme to estimate the location of the at least one stationary node using the measured network parameter.

A method, apparatus, and augmented reality system comprising an active portable anchor used by an augmented reality device to display augmented reality information on a live view of an object. The active portable anchor is configured to output a current physical anchor position of the active portable anchor relative to an object.

The invention relates to a dynamic quantity sound source tracking method based on a microprocessor array. The method comprises the following steps: using a beam-forming algorithm to process a microphone array receiving signal and calculate a spatial spectrum; calculating the matching probability of spatial spectrum peaks and tracking sound sources so as to realize data association between the spatial spectrum peaks and the tracking sound sources; updating the particle weight of each tracking sound source and updating sound source positions according to the matching result; detecting the probability that the spectrum peaks are judged to be new sound sources, activating particle filters of the new sound sources and evaluating the possibility that the particle filters exist; monitoring the active states of the tracking sound sources and deleting non-active sound sources. By using the method, multi-target real-time tracking with a dynamic sound source quantity can be realized, and the method is widely applied in complex scenes such as human-machine interaction, teleconferences and virtual reality.

In a method of reporting hidden sector information from a base station node in a wireless communication system, obtaining (S10) enhanced cell-ID measurements associated with a first user equipment communicating with the base station, and formatting (S20) the obtained enhanced cell-ID measurements into information elements of a measurement report, each such information element comprising a plurality of symbols. Subsequently, retrieving (S30) hidden sector information for the first user equipment, which hidden sector information comprising an indication of an antenna sector of the base station in which the first user equipment is located, and encoding (S40) the retrieved dormant/latent sector information using at least one selected symbol of the plurality of symbols of the measurement report to provide a transformed measurement report. Finally, reporting (S50) the transformed measurement report.

The invention provides a magnetic induction through-the-earth positioning method based on path loss, and belongs to the technical field of magnetic induction through-the-earth positioning. According to the method, the horizontal distance between the transmitter and the receivers is calculated by utilizing the geometrical relationship between the intersection points of the central axes of the two receivers and a transmitter coil on the ground and the ground, the corresponding relation between the magnetic induction through-the-earth positioning signal intensity at a certain point on the groundunder a rectangular coordinate system and the depth from the underground transmitter to the ground is derived, and the distance between the transmitter and the ground is determined according to the magnetic induction through-the-earth positioning signal intensity at the certain point on the ground, so that the vertical depth positioning based on path loss is achieved. According to the method, thechange rules of the horizontal component, the vertical component and the sum vector of the through-the-ground positioning signal along with the distance between the underground transmitter and the ground is analyzed, the one-to-one correspondence relationship between the positioning signal and the vector and the depth between the transmitter and the ground is established, and more accurate through-the-ground positioning of the signal attenuation based on a ground medium is realized.

The method includes following steps: mobile positioning center receives positioning request; mobile positioning center sends request information to home location register (HLR) registered by corresponding mobile terminal requesting positioning service, the request information requests address of mobile exchanging center at location the said mobile terminal roams at; mobile positioning center sends positioning request to corresponding positioning entity; positioning message interaction is carried out between positioning entity and mobile terminal so as to calculate position information of mobile terminal; positioning entity sends position information to mobile positioning center. In the invention, mobile terminal is in area covered by GPS satellite data. The invention raises positioning precision and success ratio.

The invention discloses an unknown period acoustic beacon high-precision positioning method based on an underwater maneuvering platform. The method comprises the following steps: step 1, estimating asignal arrival time and a period number; step 2, selecting a positioning period and calculating a second-order time delay difference; step 3, carrying out positioning calculation by utilizing the second-order time delay difference and establishing a positioning calculation equation set according to second-order time delay difference information. The positioning precision can be effectively improved, and high-precision acoustic beacon position coordinates can be obtained.

The invention discloses a vehicle positioning method, an automobile, a storage medium and a positioning system. The method comprises the steps of periodically sending a broadcast message which requests to establish a connection; receiving first feedback information of a first marking point responding to the broadcast message, and acquiring first position information contained in the first feedbackinformation; taking the first position information as the self quasi-position information, and carrying out positioning on a pre-stored off-line electronic map according to the quasi-position information; acquiring the movement information of the self movement sensor; and calibrating the positioning information on the off-line electronic map according to the movement information. The pre-stored off-line electronic map is positioned according to the first position information, and the positioning information on the off-line electronic map is calibrated according to the movement information, soas to obtain the quasi-position information of a vehicle in the parking lot, so that a user can quickly confirm the position of the vehicle according to the quasi-position information, the searchingspeed of the vehicle is increased, and the turnover period of vehicles is also shortened.

The present invention discloses a three-dimensional spatial positioning method and system. When a signal receiving device detects first laser plane signals, second laser plane signals, and ultrasonicsignals, the method does not perform fusion processing on the multiple ultrasonic signals received by the signal receiving device, selects an ultrasonic signal receiving unit that receives the ultrasonic signals the earliest among a plurality of ultrasonic signal receiving units on the signal receiving device as an optimal ultrasonic signal receiving unit, calculates the distance between the signal receiving device and a signal transmitting device according to the time at which the optimal ultrasonic signal receiving unit receives the ultrasonic signals, then calculates a first rotation angleand a second rotation angle according to time at which the signal receiving device receives the first laser plane signals and time at which the signal receiving device receives the second laser planesignal, and further determines three-dimensional coordinates of the signal receiving device in a three-dimensional measurement coordinate system, and improves spatial positioning accuracy.

The invention provides a range finding system based on a customized range finding protocol. The range finding system based on a customized range finding protocol includes at least one range finding device, wherein the range finding device is used for performing range finding and communication through UWB (Ultra Wide Band) signals, and performing range finding in a TW-ToF mode; the range finding device includes a processor, a transceiver, an antenna, a setting module, an ID register and a communication interface; the processor is used for data processing; the transceiver is connected with the processor and is also connected with the antenna; the transceiver is used for outputting a range finding request through the antenna, and receiving the range finding requests of other range finding devices through the antenna at the same time; the antenna is used for data transmission; the setting module is connected with the processor; the setting module is used for setting the operating mode of the range finding device; the ID register is a nonvolatile memory, and is used for storing the ID identification numbers of all the range finding devices; and the communication interface is connected with the other range finding devices for performing many-for-one range finding.

The invention discloses an external device positioning method and device, and a virtual reality device and system. The virtual reality device is provided with an ultrasonic transmitter. The external device is equipped with at least two ultrasonic receivers. The method comprises: ultrasonic signal information of at least two ultrasonic receivers is obtained, wherein the ultrasonic signal information includes distances between the at least two ultrasonic receivers and the ultrasonic transmitter and the ultrasonic signal intensity; according to the ultrasonic signal intensity, a first ultrasonicreceiver for locating an external device is determined between the at least two ultrasonic receivers; according to the distance between the first ultrasonic receiver and the ultrasonic transmitter, location information of the first ultrasonic receiver is determined; and on the basis of the location information of the first ultrasonic receiver, location information of the external device is determined. According to the embodiment of the invention, the accuracy of the location information of the external device is improved, so that the positioning effect of the external device is further improved.