67results about How to "Continuous positioning" patented technology

The present invention relates to a light-emitting device including a light source, a first light-emitting material spaced apart from the light source, and at least one additional light-emitting material. The first light-emitting material includes low reabsorbing semiconductor nanocrystals having an emission-center core, an exterior protective shell, and at least one inner light-absorbing shell. The device is useful for efficiently producing white light having a high color rendering index.

The invention discloses a VHF (very high frequency) frequency-range intracloud lightning detecting and positioning system, which comprises a central treatment station and a plurality of detection and treatment sub-stations arranged in different positions, wherein the detection and treatment sub-stations and the central treatment station are accessed into a public wide area network in a wired or wireless mode; and through the wide area network, on one hand, obtained intracloud lightning detection data is uploaded to the central treatment station by the detection and treatment sub-stations, andon the other hand, the working state of each detection and treatment sub-station is remotely monitored by the central treatment station. The system can be used for precisely estimating the incidence directions of lightning radiation signals of a plurality of simultaneously occurring lightning radiation sources or the same lightning radiation source arriving at the detection sub-stations through different propagation paths, the arriving time difference of the lightning signals between any two detection and treatment sub-stations is calculated at the central treatment station (TDOA estimation),and the spatial position of an intracloud lightning radiation source is determined by DOA and TDOA information.

The invention relates to a navigation positioning technology, particularly an implementing method for vehicle positioning. The invention discloses a vehicle positioning implementing method aiming at the disadvantages of GPS and DR in prior art and combining GPS and DR to implement positioning with high efficiency, accuracy and continuation. The key points of the technical scheme are as follows: judging whether the latitude and longitude data obtained from GPS is abnormal, if not, then figuring out the vehicle current road and the specific position on the road by a matching algorithm of GPS and electronic map, if yes, then figuring out the vehicle current road and the specific position on the road by a matching algorithm of DR and electronic map. The invention combines GPS and DR and is suitable for positioning vehicles with high efficiency, accuracy and continuation.

The invention relates to an acoustic-electric detection device for the insulation defects of a power cable, characterized by comprising a cable to be detected and a two-channel detection mechanism connected with the cable to be detected. The output end of the two-channel detection mechanism is connected with a receiving device and comprises an electromagnetic wave detecting head and an ultrasonicwave detecting head; the electromagnetic wave detecting head is connected with the cable to be detected; the surface of the ultrasonic wave detecting head is coated by silicone grease; the electromagnetic wave detecting head and the ultrasonic wave detecting head are electrically connected with respective signal acquisition processors and transfer cable insulation defect signals detected by the two-channel detection mechanism to the signal acquisition processors; and the signals processed by the signal acquisition processors are sent to a signal displaying and alarming system to detect and alarm the insulation defects of the cable. Partial defects in the cable are found and positioned as early as possible by the online monitoring or the routing inspection of the partial discharge of the cable. The invention finds the partial defects in the cable as early as possible, grasps the operation conditions of the cable in time and prevents major accidents from occurring.

A bone anchoring device is provided that includes an anchoring element with a shank to be anchored in a bone or a vertebra, a connection element for connecting at least two anchoring elements, the connection element being made of an elastic material, a receiving part being connected to the shank for receiving the connection element and connecting the connection element to the shank, a seat for the connection element the seat being provided in the receiving part, and a locking element being engageable with the receiving part for fixation of the connection element in the seat. At least the portion of the connection element which is received in the recess has a substantially smooth-surface. The locking element has an engagement structure which contacts the surface of the connection element in such a way that a form-fit connection is provided.

The invention provides a three-dimensional positioning and attitude-determining method and a system for a track detection platform in a dynamic environment. The method comprises the steps of calibrating the relative spatial positions and attitudes of the left and right cameras of a binocular stereo camera; calibrating the relative position and attitude parameters of the binocular stereo camera relative to the laser inertial navigation; taking the photos of a CPIII control point by means of the binocular stereo camera to obtain multiple photos of the control point; obtaining the position and the attitude of the binocular stereo camera through the stereo intersection process; adopting the position and the attitude of the binocular stereo camera as weighted observation values and inputting the weighted observation values into an INS / OD navigation system for filtering, smoothing and interpolating treatments so as to obtain the positioning and the attitude of the track detection platform. According to the technical scheme of the invention, the data of a track line high-precision control network and the data of an inertial navigation meter / speedometer are fused based on visual techniques, and the combined resolving method is adopted. In this way, the continuous and high-precision positioning and attitude-determining effect of the dynamic track detection platform is realized. The method and the system can be widely applied to the track detection of high-speed rails and subways, and the mobile road measurement.

The invention discloses a method for tracking an extended target by multiple sensors with partially overlapped monitoring areas. A Gaussian component which is used when a current measurement set is subjected to wave filtering serves as a Gaussian component which is predicted at a current moment rather than a Gaussian component after the measurement of any one sensor is updated, so that the results of the sensors after wave filtering updating are mutually independent; after the measurements of all sensors participate in the wave filtering updating, Gaussian items in the results of all the sensors are judged: if a component representing a target position in the Gaussian item estimated by the sensor falls into an overlapping area, the weight value of the component is subjected to averaging optimization treatment; finally, the weight values, the average values and the covariances of the Gaussian items estimated by all the sensors are combined into one Gaussian component which serves as the Gaussian component predicted at a next moment. By using the method for tracking the extended target by the multiple sensors with the partially overlapped monitoring areas, which is provided by the invention, the problem that a target quantity is over-estimated due to the overlapping areas and the problem that measurement information is seriously lost due to non-overlapping areas are solved.

The invention discloses a highly reliable fused vehicle positioning method in the vehicle and road coordinated scene, and aims at solving the problems that vehicle satellite navigation in the urban environment tends to be limited and is low in positioning accuracy and reliability. On the basis of traditional vehicle-mounted satellite and inertia combined navigation, the UWB positioning technologyis introduced, UWB nodes are laid reasonably, and an NLOS (Not Line of Sight) error processing algorithm is combined, so that an observed UWB value error is reduced. Further, fused vehicle positioningis realized on the basis of an expanded Kalman filtering algorithm. Compared with the traditional vehicle-mounted satellite and inertia combined navigation, the method is high in reliability in the urban environment especially in the complex environment that satellite signals are shielded (as in a canyon or crossing), and the vehicle can be positioned continuously, completely and reliably in realtime.

The invention provides a terrain auxiliary navigation method based on mixture of a terrain contour matching (TERCOM) algorithm and particle filtering, aiming at solving the problems of large initial position error and the diffusing of a wave filter when an aircraft flies at high maneuverability in a flat terrain region. The navigation method comprises a searching mode, a tracking mode, a losing mode and mode logical shift. In the searching mode, measurement information is processed in batches respectively by a mean absolute deviation (MAD) algorithm, a mean-square deviation (MSD) algorithm and a cross correlation (COR) algorithm, and initial positioning is quickly and exactly realized under the large initial position error according to a consistent voting algorithm; under the tracking mode, the measurement information is processed in a recurrence way by means of particle filtering, and the continuous matching and position can be realized under the tracking mode; and the searching mode is shifted into the tracking mode after the initial positioning is realized by the losing mode and the mode logical shift, and the tracking mode is shift to be the searching mode after pseudo positioning exists. The continuous positioning under the large initial position error can be guaranteed to be stably and reliably realized.

The invention discloses a locomotive positioning method and system. The locomotive positioning method comprises the following steps: determining the state of current positioning environment; when an LKJ is in the monitoring state and satellite signal is available, obtaining the position data of the LKJ and the position data of a GPS / BD, wherein the LKJ positioning manner is used as the main manner, and the GPS positioning assists to rectify deflected positions; when the LKJ is in the monitoring state and no satellite signal is available, obtaining the position data of the LKJ, wherein positioning is performed by the LKJ manner; when the LKJ is in the non-monitoring state and satellite signal is available, obtaining the continuous preset number of GPS coordinate data of a locomotive, and the locomotive is positioned according to the GPS coordinate data; and when the LKJ is in the non-monitoring state and no satellite signal is available, positioning the locomotive by adopting a speed-measurement positioning method and a dead reckoning method. An LKJ positioning method and a GPS positioning method are combined, so that the problem that the locomotive cannot be accurately positioned in a whole journey is solved, and the locomotive positioning method is continuous in positioning, and high in positioning precision.

The invention relates to a Beidou / GPS dual-mode navigation positioning device and method, and the method comprises the steps: receiving a Beidou / GPS satellite signal, and reading satellite data; analyzing and calculating the satellite data, obtaining a first Beidou / GPS difference correction number, and storing the first Beidou / GPS difference correction number at a reference station; receiving a Beidou / GPS satellite signal and reading the satellite data; carrying out the analyzing and calculation of the satellite data, and obtaining a second Beidou / GPS difference correction number; carrying out the matching and correction of the first and second Beidou / GPS difference correction numbers, obtaining a corrected Beidou / GPS difference correction number, carrying out the position analysis, and carrying out the dual-mode positioning; and enabling an airborne moving station to carry out the continuous positioning. Compared with the prior art, the method can improve the positioning speed and precision. The method also can achieve the continuous positioning under the condition of no satellite signal, and improves the positioning precision.

A vehicle seat comprising a seat back pivotally mounted on a seat proper to pivot about a transverse horizontal axis of rotation, the seat proper having a rigid framework which carries flexible padding and on which a support member is movably mounted to move vertically, the support member being adapted to form an abutment preventing the user of the seat from plunging into the padding downwards and forwards when the seat is subjected to high forward deceleration. The seat further comprises a coupling device connected to the support member and adapted to raise said support member when the seat back pivots backwards, and to lower the support member when the seat back pivots forwards.

The invention relates to a thermo-forming packaging machine and a method which are characterized in that the location of trays in a base film upstream of a sealing station is detected by a measuring system and that the sealing station is immediately subsequently positioned such as to allow a top film to be sealed with highest accuracy matching the tray and thereby to be able to compensate for irregularities and tolerances, for example, in the film feed, in a true-to-cycle manner.

The present invention relates to a light-emitting device including a light source, a first light-emitting material spaced apart from the light source, and at least one additional light-emitting material. The first light-emitting material includes low reabsorbing semiconductor nanocrystals having an emission-center core, an exterior protective shell, and at least one inner light-absorbing shell. The device is useful for efficiently producing white light having a high color rendering index.

A switching apparatus having an actuating shaft, an actuator, at least one switch and a housing. A switching apparatus is in the form of at least one actuating guide which is connected with a first actuating guide portion to the actuating shaft and which with a second actuating guide portion at least partially embraces the actuating shaft at a predetermined spacing, wherein provided on the convex side of the second actuating guide portion is an actuating track for the switch or switches, insofar as at least one predetermined position the spacing between the outer peripheral edge and the actuating shaft is greater for a predetermined arcuate dimension than at other positions of the second actuating guide portion.

To provide a production method of a liquid crystal display device and a liquid crystal display device, in which generation of a joint line on a display screen is suppressed and yield can be improved even if a substrate is subjected to an alignment treatment by completing exposure for the substrate through several exposures in a liquid crystal display device including pixels each having two or more domains. The present invention is a production method of a production method of a liquid crystal display device, the liquid crystal display device including: a pair of opposed substrates; a liquid crystal layer formed between the pair of opposed substrates; and an alignment film arranged on a liquid crystal layer side surface of at least one of the pair of opposed substrates, and the liquid crystal display device having two or more regions which differ in alignment azimuth in a pixel, wherein the production method comprises an exposure step of exposing the alignment film in such a way that a substrate plane is divided into two or more exposure regions through a photomask in each exposure region, and in the exposure step, exposure is performed in such a way that adjacent two exposure regions have an overlapping exposure region where the adjacent two exposure regions partly overlap with each other, and the photomask has a halftone part corresponding to the overlapping exposure region.

The invention relates to a method for contactless recording of a track geometry of a track by means of a rail vehicle which is moved along the track on on-track undercarriages (4), wherein profile data of the track extending in transverse direction are compiled by means of a laser scanner. In this, it is provided that, by means of an evaluation device, profile data are evaluated relative to a reference base pre-defined on the rail vehicle in order to derive from this the course of a track central axis and / or a rail. The invention additionally relates to a rail vehicle which comprise an evaluation device configured for carrying out the method. Thus, no further measuring system is required to determine a track position.

The invention discloses a construction method of a visual point cloud map. The method includes the steps of: carrying out feature extraction on an acquired source image frame of the space of the to-be-built map; obtaining a source image frame feature point; performing inter-frame tracking on the source image frame; determining key frames, matching the feature points in the current key frame with the feature points in the previous key frame; obtaining matching feature points of the current key frame, calculating spatial position information of the matching feature points in the current key frame, taking the spatial position information of the matching feature points as map point information of the current key frame, and taking point cloud formed by map point sets of all key frames as a first visual point cloud map. According to the method, mapping and positioning are separated in the map construction process, the mutual influence of mapping and positioning is effectively removed, and the method has better adaptability and stability in a complex and changeable environment.

The invention discloses a GNSS positioning method and a GNSS positioning device. The method comprises steps that when the differential positioning result obtained by a first positioning module of theGNSS positioning device meets the preset condition, the differential positioning result is outputted as a high-precision positioning coordinate; when the differential positioning result obtained by the first positioning module of the GNSS positioning device does not satisfy the preset condition, according to a pre-established multipath error correction model and a time delay error correction model, first satellite observation data obtained by a second positioning module of the GNSS positioning device is error-corrected to obtain high-precision positioning data. The method is advantaged in thatthe high-precision positioning data can be continuously obtained in the case of relatively poor satellite signals.

The present invention discloses a method for meter location based on fusion of the reverse RTD (Real Time Differential) and the pedestrian dead reckoning. The method comprises the following steps: a central server performs real-time decoding of RINEX binary data uploaded by a base station to perform base station satellite position calculation and obtain the observation satellite coordinates of a current epoch; the received original observation data uploaded by a moving station and the decoding data of the base station are subjected to data preprocessing; the time correlations of the observation epochs of the base station and the moving station are matched, pseudo-range difference location or difference is selected according to a matching result to calculate the coordinates of the moving station, and the meter location precision is obtained; and the obtained three-dimensional coordinates of the moving station are converted to a BLH, a standard GGA is generated, and the real-time continuous location of the moving station is completed. Further, the present invention provides a system for meter location based on the method provided by the invention. The method and system for meter location based on fusion of reverse RTD and pedestrian dead reckoning can realize continuous real-time location of the moving station in a complex environment and obtain meter location precision.

An intraluminal graft includes a tubular graft body extending along a cylindrical axis, a plurality of wires spaced apart from each other and arranged to circumferentially reinforce said tubular graft body along a substantial portion of its length, and a body surface including an inner surface region and an outer surface region. The body surface defines a plurality of apertures extending from an exterior space, and a first portion of a first wire is in the interior space while a second portion of the first wire is in the exterior space.

The invention relates to the technical field of indoor positioning, in particular to a high-precision indoor three-dimensional positioning method based on UWB (ultra-wideband), optical flow and inertial navigation. The method comprises the steps of performing error compensation on an accelerometer and a gyroscope to complete initial alignment; entering a navigation stage, performing navigation calculation on parameters measured by the accelerometer and the gyroscope in real time to obtain real-time speed, position and attitude information of a carrier, and constructing a measurement matrix with ultra-wideband UWB positioning information and speed information of an optical flow sensor; constructing a state equation of indoor three-dimensional positioning of the carrier, and solving the state equation according to a Kalman filtering algorithm and measurement matrixes at different moments to obtain estimated values of the state matrixes at different moments, wherein the estimated values are indoor three-dimensional positioning information of the carrier. Through the method disclosed by the invention, full-autonomous indoor navigation can be realized, the required base stations can begreatly reduced in comparison with the indoor positioning of Bluetooth beacons, and the base arrangement can be greatly reduced in comparison with pure UWB indoor positioning, and the positioning is more continuous.

The invention discloses a two-dimensional vehicle positioning method in a tunnel environment and based on radio frequency identification. A radio frequency identification (RFID) technology is adopted in the urban tunnel environment and combined with an RFID positioning algorithm and a constrained optimization algorithm to position a vehicle, so that accuracy of vehicle positioning is improved, and two-dimensional position information of the vehicle in the tunnel environment can be accurately estimated in real time. The two-dimensional vehicle positioning method has the remarkable advantages of being high in positioning speed and accuracy, good in real-time performance and the like.

An intraluminal graft includes a tubular graft body extending along a cylindrical axis, a plurality of wires spaced apart from each other and arranged to circumferentially reinforce said tubular graft body along a substantial portion of its length, and a body surface including an inner surface region and an outer surface region. The body surface defines a plurality of apertures extending from an exterior space, and a first portion of a first wire is in the interior space while a second portion of the first wire is in the exterior space.

The invention provides a bus recognition method. According to the bus recognition method, a bus line projection calculator conducts comprehensive calculation according to the position of a user and bus line data and through the combination between historical virtual bus data and last-time position information of the user, and updates virtual bus data and position information. According to the bus recognition method, due to the mode that the bus position is judged through GPS information of the user, the high equipment cost and the high maintenance cost for installation of a large number of vehicle-mounted GPSes are avoided; the specific positions of buses can be located more accurately and continuously under the condition that a plurality of users use the bus recognition method, and the better usage experience is provided for the users.

A method for installing a plurality of rotor blades to a rotatable hub secured atop a tower of a wind turbine includes providing a counterweight assembly having, at least, an arm member and a counterweight mass secured at a distal end of the mounting assembly. The method also includes securing the arm member of the counterweight assembly to the hub of the wind turbine. Further, the method includes consecutively installing the plurality of rotor blades onto the hub of the wind turbine. Moreover, the method includes rotating the arm member about a rotation axis of the hub to continuously adjust a position of the counterweight mass between each consecutive installation of the plurality of rotor blades to change a center of gravity of the hub and maintain a balanced rotor of the wind turbine during installation of the plurality of rotor blades.

The invention relates to a Bluetooth indoor positioning method for improving PDR and RSSI fusion, and the method comprises the following steps: 1), constructing an RSSI positioning gray image set as a training set of a CNN positioning model, carrying out the RSSI positioning through employing the trained CNN positioning model, and obtaining an initial RSSI positioning result; (2) constructing an IMU data set according to walking data, collected by an IMU, of pedestrians, adopting a PDR algorithm for positioning, and obtaining an initial PDR positioning result; 3) correcting the initial PDR positioning result by adopting a PDR correction algorithm based on the stay duration; and 4) fusing the corrected PDR positioning result with the RSSI positioning result by using an EKF filter to obtain a final positioning result. Compared with the prior art, the method improves the problem of PDR error accumulation, improves the positioning precision, has higher system stability and universality, and can provide a more accurate positioning result for indoor personnel.

A magnetic recording medium has a substrate, and a servo signal recording magnetic layer whose magnetization is oriented in a direction perpendicular to a surface thereof, a non-magnetic layer and a data recording magnetic layer, which are stacked on the substrate in the order mentioned. The servo signal recording magnetic layer has a coercivity higher than that of the data recording magnetic layer. The servo signal recording magnetic layer has servo tracks formed with a track pitch Tps, the servo tracks adjacent to each other in a track width direction being magnetized to opposite directions perpendicular to the film surface.

The invention discloses a three-dimensional positioning and attitude determining method for a rail detection platform under dynamic environment. The method comprises the following steps that: A: calibrating the relative spatial position attitude of a left camera and a right camera of a binocular stereo camera; B: calibrating a relative position attitude parameter between the binocular stereo camera and inertial navigation; C: according to the binocular stereo camera, photographing a CPIII control point to obtain multiple control point pictures, and according to stereo rear intersection, obtaining the position and the attitude of the binocular stereo camera; D: taking the position and the attitude of the binocular stereo camera as an observation value with weight to be input into an INS (Inertial Navigation System) / OD (ODometer) navigation system, and carrying out filtering, smoothening and interpolation processing to obtain the position and the attitude of the rail detection platform,wherein the INS / OD navigation system is an inertial navigation system / odometer navigation system. The method aims to solve the problems in the prior art that blocking formed by urban subway tunnel environment on a GNSS (Global Navigation Satellite System) signal enables the combined positioning and attitude determining method of the GNSS / INS is greatly affected and the accuracy and efficiency requirements of the detection system can not be met.