73results about How to "Improve positioning quality" patented technology

A method and an apparatus for selecting a location platform for a user equipment to roam and a method for determining the location of the user equipment using the same. The method for selecting a location platform includes: checking a visiting network of the UE in response to a location request message transmitted from the UE which is roaming; and selecting a location platform to calculate a location of the UE by comparing positioning capability information of the checked visiting network and positioning capability information of a home network of the UE. According to such a method, it is possible to efficiently perform the positioning of the UE, regardless of the location of the UE, thereby improving the quality of the positioning service.

The invention relates to a face recognize system, comprising a network interface module, a dual-core chip SOC module connected with the network interface module, a CPLD address code, a DDR2 high-speed operation memory, and an external program memory, or even with a hard disk with an IDE. The dual-core chip module is connected with the high-speed operation memory via a data bus. The CPLD address code via an EMIF bus is connected with the external program memory NAND Flash or connected with the IDE hard disc too. And the whole system is powered by a power module. The recognize method comprises video code compression, pretreatment, motion check, face positioning, organ positioning, normalizing, character extraction, face comparison, and data communication. The invention has the advantages in high recognize rate and high recognize speed, strong data processing ability, better compatibility with prior detect network, stable operation, easy upgrade and maintenance, with low cost.

The invention discloses a medicine bottle foreign matter detection method based on medical visual detection robot image correction. The method comprises the following steps: accurately calculating the rotating angle and the horizontal offset of a medicine bottle on the basis of determining the characteristic of the medicine bottle; determining the longitudinal offset in a maximal matching degree mode based on a template matching method; realizing precision correction of an image; and realizing eligible judgment of medical foreign matters through differentiation, binaryzation, superposition and the like. The sequence image high-precision registering method can be used under the environment of insufficient medical anti-shaking inhibition, effectively makes up the shortage of hardness, and is suitable for high-speed high-precision detection of a visual detection robot for medical foreign matters of ampoule, infusion solution, oral liquid, soft bags and the like.

The invention relates to a DM (Data Matrix) code locating and identification method and system. The method comprises the steps of obtaining a binary image of an original image; extracting an effective region which contains a DM code from the binary image; obtaining a confidence single-edge image from the effective region; performing Hough transform on the confidence single-edge image, establishing an angle shielding region after finding a response point corresponding to a first search mode edge in a parameter space of a Hough transform domain, searching for a second search mode edge outside the angle shielding region, and obtaining three locating points at the end points of the two search mode edges; obtaining two switching mode edges of the DM code by rotating a pixel accumulator with a direction, and solving a fourth locating point; performing inverse perspective transformation on the DM code according to the four locating points to obtain a standard DM code image and performing mesh division on the standard DM code image; and performing codon extraction on the DM code subjected to the mesh division, and recovering codon information. According to the method and the system, the DM code still can be efficiently located and identified when a DM image is seriously defiled.

The invention discloses a fixture device for machining large-scale thin-walled impellers and a finishing method for large-scale thin-walled impellers. The fixture device includes a bottom plate, and the working surface of the bottom plate is provided with a first recess and a second recess. The circular surface fits, and the second concave part cooperates with the second circular surface of the impeller end. The edge of the first concave part is provided with a first pressing part for pressing the impeller wall, and the center of the second concave part is detachably provided with a The second circular surface is locked to the second pressing part of the bottom plate. In the present invention, the first circular surface at the end of the impeller is positioned by setting the first recess, and the impeller is locked to the bottom plate through the first pressing part without welding. The fixing is convenient and fast. After the first round of machining of the impeller, the second concave part is set to position the second circular surface of the impeller, and the second pressing part is used to fasten the impeller to realize sequential machining of the impeller. Avoid the situation that some surfaces are not processed due to fixtures or other reasons, and improve the surface accuracy of the impeller.

For enhancing the quality of a relative positioning, a filter is adjusted depending on information on a movement of a satellite signal receiver. A position of the satellite signal receiver is determined relative to a reference station using the filter, wherein measurements on satellite signals received by the satellite signal receiver and measurements on satellite signals provided for the reference station are used as input to the filter. The measurements for the reference station may be received in messages which are assembled and provided for transmission and which may include in addition an indication of a current movement of the reference station.

The invention provides a sub-pixel positioning method and system based on spatial gravity and pixel aggregation degree. The method comprises the steps of S1, based on abundance values of various ground objects in mixed pixels of a remote sensing image, obtaining a total gravity value of sub-pixels belonging to the various ground objects in central mixed pixels and sub-pixels of the same ground object types in 8-neighborhood adjacent mixed pixels, and based on the calculated gravity value, allocating initialized ground object types to the sub-pixels in the central mixed pixels; and S2, carryingout pixel aggregation degree optimization on sub-pixel distribution in the step S1: S21, calculating a pixel aggregation degree objective function; S22, exchanging the pixels to optimize sub-pixel spatial distribution and updating the objective function in the step S21; S23, traversing all the mixed pixels in the remote sensing image, and executing the step S22 for each mixed pixel; and S24, by using an iteration algorithm, repeating the steps S22-S23. A sub-pixel positioning result calculated by the method and the system has not only relatively high spatial correlation but also effective ground object spatial distribution, so that the applicability of a sub-pixel positioning model to the ground objects with different sizes is improved.

For enhancing the quality of a relative positioning, a filter is adjusted depending on information on a movement of a satellite signal receiver. A position of the satellite signal receiver is determined relative to a reference station using the filter, wherein measurements on satellite signals received by the satellite signal receiver and measurements on satellite signals provided for the reference station are used as input to the filter. The measurements for the reference station may be received in messages which are assembled and provided for transmission and which may include in addition an indication of a current movement of the reference station.

The invention belongs to the technical field of visual SLAM processing technology and mobile chassis navigation path planning, and particularly relates to an active visual SLAM system based on a panorama camera, which comprises an intelligent chassis module, a panorama camera module, a camera dynamic bracket, a monocular camera module and a processor; the processor comprises an evaluation module, a visual SLAM processing module, a global planning module, a local path planning module and a dynamic support planning control module. By adding the intelligent chassis module capable of doing curvilinear motion at any radius, the monocular camera module installed on the multi-degree-of-freedom camera dynamic support and the panoramic camera module used for evaluating the whole environment, the problem that traditional visual SLAM mapping scanning is not purposeful is solved. According to the invention, visual mapping and positioning are more purposeful, the mapping and positioning speed is increased, the mapping and positioning quality is improved, and the mapping and positioning reliability and flexibility are enhanced.

The invention provides a guide positioning operation frame for steel pipe pile construction. The operation frame comprises an operation cage, a first guide frame, a first positioning mechanism, a second guide frame and a second positioning mechanism. The first guide frame is connected with the top of the operation cage, and the first guide frame is provided with a first channel for a steel pipe pile to penetrate; the first positioning mechanism is arranged on the first guide frame and used for adjusting the size of the first channel; the second guide frame is connected to the bottom of the operation cage, the second guide frame is provided with a second channel for the steel pipe pile to be penetrate, and the second channel and the first channel are completely coincided with each other inthe penetrating direction of the steel pipe pile; and the second positioning mechanism is arranged on the second guide frame and is used for adjusting the size of the second channel, and the second positioning mechanism and the first positioning mechanism are completely coincided in the penetrating direction of the steel pipe pile. The guide positioning operation frame can quickly realize verticalcorrection of the steel pipe pile, improves the precision of the verticality of the steel pipe pile, prevents displacement of the steel pipe pile and improves the positioning efficiency and the positioning quality of the steel pipe pile.

The invention discloses a capacitor production positioning device, which comprises a length positioning mechanism and a width positioning mechanism. The length positioning mechanism comprises a positioning rod. The middle portion of the positioning rod is provided with two first positioning through holes. The two first positioning through holes are corresponding to space between capacitor electrode leading-out terminals in the length direction; downward limit vertical arms are arranged close to the two ends of the positioning rod; and the distance between the inner side surfaces of the two limit vertical arms is in limit cooperation with the distance of housing outer walls of a capacitor in the length direction. The width positioning mechanism comprises a positioning pressing plate and an electrode leading-out terminal positioning plate arranged under the positioning pressing plate. The two ends of the positioning pressing plate are downwardly and respectively connected with a limit positioning block with a trapezoid limit positioning step. The two trapezoid limit positioning steps jointly form a limit positioning member of the capacitor in the width direction. Effective and quick production positioning and limit of the electrode leading-out terminals in the length direction and width direction are realized; the electrode leading-out terminals are positioned accurately and do not deviate; the production efficiency is high; and one-time qualified rate is high.

A method for controlling a production process for the manufacture of customized production objects. A sequence of production objects runs through at least one partial process of a production process. The method ensures that, in series production, the processing of an order in the partial process is begun at the latest after a maximum waiting time. The sequence of electronically available orders is handled separately from the sequence of production objects and a copy of the order sequence is generated. If the first order of the copy does not match the first production object, the order is stored in an electronic buffer memory and a matching order for the first production object is determined. The order with the greatest waiting time is removed from this buffer memory whenever the previous waiting time exceeds a prescribed waiting time limit. A production object matching this order is brought forward and processed according to the order.

The invention provides a method for assisting location of user equipment (120) based on time measurement in a signal device (150). The signal device is associated with an s cell (160). The s cell (160) is identified as the s cell with limited functionality by a first network node (110). Therefore, for the user equipment (120), the s cell cannot be taken as a candidate cell which is used for serving the user equipment (120) and transmitting data. The s cell associated with the signal device is contained in a location neighbor list of a neighbor cell. The user equipment can carry out time measurement on the neighbor cells in the list, thereby facilitating location. The signal device is configured for transmitting a predefined reference signal according to a predefinition mode correlated to a pre-selected time slot and a pre-selected sub-carrier in a predefined sub-frame. The signal device obtains sync information. The signal device transmits the reference signal according to configuration. When the s cell associated with the signal device is contained in the location neighbor list, the user equipment can receive the transmitted reference signal and carry out time measurement on the transmitted reference signal for location.

The invention discloses a three-dimensional image fragile watermark method based on joint just noticeable distortion and in particular relates to a three-dimensional image location tampering and restoring fragile watermark algorithm based on JJND (Joint Just Noticeable distortion). Firstly, a three-dimensional image block is divided into a relative sensitive block and a relative insensitive block according to a JJND model and the number of three-dimensional image match blocks, then discrete cosine transform and quantization compression are carried out on the image blocks to generate watermarks, and unsymmetrical watermark embedding of different type blocks of the three-dimensional image is built according to the JJND model and types of the image blocks. Restored watermarks can be used for locating the positions of the tampered portions to further improve transparency of the image. Meanwhile, copy embedding of the restored watermarks in the three-dimensional image can improve the capacity for the watermarks to restore tampered information. Experiments show that the three-dimensional image fragile watermark method based on the joint just noticeable distortion is accurate in location on the tampered positions and has higher restoring capacity on the tampered areas.

The invention discloses a robot positioning method based on particle filtering. The method comprises the following steps: (1) obtaining visual map coordinates; (2) converting map coordinates; (3) estimating the motion of a wheel speedometer and a gyroscope; and (4) carrying out Kalman filtering. The invention belongs to the technical field of robots, and particularly relates to a robot positioning method based on particle filtering, which combines vision and a gyroscope, utilizes a data association and multi-sensor fusion technology, improves the positioning effect and provides a more ideal technical scheme for scenes such as robot distribution and transportation.

A navigation receiver operating in a differential navigation mode transmits primary estimates of coordinates with an accuracy estimate that can vary during operation. To improve the positioning quality when the accuracy estimate changes, smoothed estimates of coordinates are generated according to a two-branch algorithm. The current-epoch accuracy estimate is compared to a current-epoch value of threshold accuracy. Upon determining that the current-epoch accuracy estimate is greater than or equal to the current-epoch value of threshold accuracy, the current-epoch smoothed estimates of coordinates are set equal to the current-epoch extended estimates of coordinates calculated from the sum of the previous smoothed estimates of coordinates and coordinate increments calculated from carrier phases. Upon determining that the current-epoch accuracy estimate is less than the current-epoch value of threshold accuracy, the current-epoch smoothed estimates of coordinates are generated based on the sum of the current-epoch extended estimates of coordinates and a correction signal.

The invention discloses a two-stage active instant positioning and mapping algorithm based on graph topology. The algorithm is divided into a global stage and a local stage. The method comprises the following steps: firstly, acquiring a current pose, a pose map and a navigation map of an unmanned platform by an algorithm, and calculating local leading edge points and candidate loopback points; if the points exist, entering a local exploration stage, constructing a local topological graph through a fast random spanning tree algorithm, solving a shortest path to any vertex of the local topological graph by using a Dijkstra algorithm, scoring a path set according to a local exploration and active loopback joint objective function, solving an optimal path, and finally obtaining the optimal path. And updating the global topological graph and the global frontier points according to the local topological graph and the local frontier points. On the contrary, when no local leading edge point exists in the local range and no loopback requirement exists, the algorithm enters a global exploration stage, the unmanned platform goes to the unexplored area to conduct local exploration again according to the global topological graph, and after exploration of the designated area is completed, the unmanned platform returns to the starting point, and the exploration task is completed.

The invention discloses a portable multi-directional steel bar net piece space positioning device, which comprises a positioning clamping element, a hole connecting disc and a head connecting disc. A hollow design concept is used; in addition, an entity of the portable multi-directional steel bar net piece space positioning device is formed by assembling all parts; the carrying, the assembly and the operation are convenient; meanwhile, the arrangement of the portable multi-directional steel bar net piece space positioning device is flexible; the precision is controllable; each part can be designed and processed according to unit length; after the assembly, the integral precision is also controlled in the unit length; no artificial operation error and no processing error exist; in addition, the cost of the portable multi-directional steel bar net piece space positioning device is low; the processing is convenient; the positioning is firm; the space is adjustable. The portable multi-directional steel bar net piece space positioning device can also be widely used in different terrains without limitation; meanwhile, the one-way positioning function can be realized; in addition, the space positioning function in any direction can also be realized, for example in the X direction, the Y direction, the Z direction, the XY direction, the XZ direction, the YZ direction and the like; meanwhile, the space positioning device can be used for the steel bar net space positioning of various components such as beams, plates, posts, walls and blinding layers.

A method of communication between a vehicle and a wayside unit for controlling an inductive energy transfer to the vehicle, a vehicle and an arrangement are provided. The invention relates to a method of communication between the vehicle (1) and the wayside control unit (11) for controlling the inductive power transfer to the vehicle (1), wherein the control unit (11) controls a generation of an electromagnetic field by a primary unit (9) with a primary winding structure of a system for inductive power transfer, wherein the vehicle (1) comprises a secondary unit (3) with a secondary winding structure for receiving the alternating electromagnetic field, wherein charging-related data is transmitted in between the vehicle (1) and the control unit (11) via a first communication link (13), wherein the authentication-related data is transmitted from the vehicle (1) to the control unit (11) via a second communication link (17, 18), wherein the authentication-related data is used to authenticate the charging-related data, and the vehicle (1) and the arrangement of the vehicle (1) and the primary unit.

The invention discloses a roller weldment hydraulic positioning and rotating device. The roller weldment hydraulic positioning and rotating device comprises a power control device and a hydraulic positioning device, wherein the power control device comprises a base (6), a rotating control device (3), a rotating cable (13), a rotating motor (12), a hydraulic motor (11), a hydraulic cable (10), a hydraulic pump (9), a hydraulic oil supply pipe (8), a hydraulic oil tank (7), a hydraulic oil inlet pipe (15) and a hydraulic oil return pipe (5); the hydraulic positioning device comprises an arc grooved rail (14), a rotating wheel (4), a rotating wheel positioning pin (16), a positioning supporting platform (2), a positioning turnplate (1), a positioning groove (18), a hydraulic control valve (17), a roller positioning pin (20), a hydraulic piston rod (22) and a hydraulic cylinder barrel (21). The roller weldment hydraulic positioning and rotating device is simple in structure, convenient to use, low in cost, easy to popularize, and capable of effectively improving controllability of welding operation, positioning accuracy and welding-joint quality of rollers.

The invention provides a locating correction method for improving coaxiality of bonded dual-pedal bearing inner rings. The locating correction method is as follows: three inner rings with the same type as the A-pedal inner ring (1) and the B-pedal inner ring (2) are taken as standard rings (8), wherein, the end face of each standard ring is marked with an end A and an end B, the end A is corresponding to the A-pedal inner ring, and the end B is corresponding to the B-pedal inner ring; one of the standard rings is sheathed on a fixed shaft of a working platform and the end A is contacted with the working platform, the other two standard rings (8) are respectively sheathed on two stressed shafts of the working platform and the A ends are also contacted with the working platform, wherein, the fixed shaft and the two stressed shafts are distributed at an angle of 120 degrees; the bonded A-pedal inner ring and B-pedal inner ring are placed in the middle of the three standard rings, wherein, the A-pedal inner ring is also contacted with the working platform; and at such time, the force is applied synchronously to the two stressed shafts, and then the two stressed shafts are matched with the fixed shaft to carry out locating correction on coaxiality errors generated when the A-pedal inner ring (1) is bonded with the B-pedal inner ring (2). The locating correction method in the invention is simple and practical.

The invention belongs to the technical field of service robots, particularly relates to a visual repositioning method, system and device based on a scene coordinate regression network, and aims to solve the problem that the visual repositioning method based on the scene coordinate regression network is difficult to adapt to large camera visual angle changes. The method comprises the following steps: acquiring an original color image of the surrounding environment of the service robot; constructing a first coordinate graph, a second coordinate graph and a distance graph; obtaining a source feature map through feature extraction; performing feature transformation on the source feature map; adding the transformed feature map and the source feature map, and performing regression through a regression device to obtain a 3D coordinate map and an uncertainty map; obtaining a 2D pixel coordinate graph, and filtering the 3D coordinate graph and the 2D pixel coordinate graph based on the uncertainty graph; acquiring the pose of the service robot through a PnP algorithm so as to achieve the visual repositioning of the service robot. According to the invention, the robustness of the visual repositioning method based on the scene coordinate regression network to large camera visual angle changes is improved.

A navigation receiver operating in a differential navigation mode transmits primary estimates of coordinates with an accuracy estimate that can vary during operation. To improve the positioning quality when the accuracy estimate changes, smoothed estimates of coordinates are generated according to a two-branch algorithm. The current-epoch accuracy estimate is compared to a current-epoch value of threshold accuracy. Upon determining that the current-epoch accuracy estimate is greater than or equal to the current-epoch value of threshold accuracy, the current-epoch smoothed estimates of coordinates are set equal to the current-epoch extended estimates of coordinates calculated from the sum of the previous smoothed estimates of coordinates and coordinate increments calculated from carrier phases. Upon determining that the current-epoch accuracy estimate is less than the current-epoch value of threshold accuracy, the current-epoch smoothed estimates of coordinates are generated based on the sum of the current-epoch extended estimates of coordinates and a correction signal.

Precise omega-type full lock positioning method for reinforcement of flood control wall implements the space position firstly, and by using omega-type lock catch (5) to fix the galvanized steel pipe (6) and install and make framework, the disc slot type weight pad (4) is prefabricated and then is used for supporting and fixing the concrete protective coating and implementing the thickness positioning of the protective coating; the prefabricated disc slot type weight pad (4) is additionally provided with perforated screws for fixing, the galvanized steel pipe (6) and the omega-type lock catch (5) is token out before the pouring of concrete, while the disc slot type weight pad (4) is remained in the concrete; the framework is fixed firstly, and then the colligation or the welding is implemented, and the stability of the stereotyped reinforcing bar is improved effectively; in the dismantling of later period, only the fixing units is removed, thereby the locator can be dismantled rapidly, and the locator and related auxiliary tools can be reused. Besides, the overall aesthetic of the stereotyped reinforcing bar is better.

The invention relates to a method for operating user equipment (QQ110) in a wireless network. The method comprises: measuring radio characteristics of a first set of physical resources, the first set of physical resources being available for receiving downlink reference signals for positioning (RSa-RSc) and the first set of physical resources being indicated by a first message (S211) received from a network node (QQ160), selecting a second set of physical resources from the first set of physical resources based on the measured radio characteristics, sending a second message (S122), indicative of the selected second set of physical resources to the network node (QQ160).

The invention provides a locating pin with better locating quality and relatively-high stability. The locating pin comprises a pin body (10) made of a metal material, wherein a guiding part (A) with an upper narrow part and a lower wide part is arranged on the top of the pin body (10). The locating pin is characterized by also comprising a protecting body (20) made of a softer material; the protecting body (20) comprises a connecting part (201) and a protecting part (204); the protecting part (204) radially outward extends from the top of the connecting part (201), the maximum outside diameter of the protecting part (204) is smaller than or equal to that of the pin body (10), and the lower surface of the protecting part (204) is attached to the top of the pin body (10); a connecting blind hole (101) which longitudinally downward extends is formed in the top of the pin body (10); the connecting part (201) of the protecting body (20) is in interference fit with the connecting blind hole (101) of the pin body (10).