341results about How to "Low positioning accuracy requirements" patented technology

According to one embodiment, a method of manufacturing a magnetic recording medium includes depositing a magnetic recording layer on a substrate, forming masks on areas corresponding to recording regions of the magnetic recording layer, partially etching the magnetic recording layer in areas not covered with the masks with an etching gas to form protrusions and recesses on the magnetic recording layer, modifying the magnetic recording layer remaining in the recesses with Ne gas to form non-recording regions, and forming a protecting film on an entire surface.

A method of and computer-readable medium containing instructions for high accuracy, reliable position determination. A high precision GPS-RTK system using the present novel techniques is initialized instantaneously or near instantaneously. To improve the computational efficiency and to improve the reliability of the procedure, advances in data functional and stochastic modeling, validation criteria, adaptation and system design were achieved. A position estimate using an integrated method is determined. Ambiguity resolution of the position estinate is enhanced by applying a quality control procedure using derived validation criteria. A second position estimate based on the enhanced ambiguity resolution is derived.

A method of, apparatus for, and computer-readable medium for rapid, real time kinematics determination requiring lowered information transmission for position updates than traditional RTK systems. Position signals are received from a base station and roving system and a compressed position signal is received from the base station. A position estimate using an integrated method is determined using the received position signals from the base station and the roving system and the compressed position signal from the base station. Ambiguity resolution of the position estimate is enhanced by applying a quality control procedure using derived validation criteria. A second position estimate is derived based on the enhanced ambiguity resolution. Because of the use of the compressed position signal smaller transmissions may be performed at a more rapid rate providing a higher position update rate.

A semiconductor chip-embedded substrate comprising a supporting substrate and an insulating layer thereon, members for the connection to external circuits, and a plurality of semiconductor chips embedded in the insulating layer, wherein at least some of the plurality of semiconductor chips are embedded as a stack or stacks thereof. A method of manufacturing such a semiconductor chip-embedded substrate is also disclosed.

The invention relates to a position-based security early warning method, a terminal and a system. The method includes the following steps that: the actual position of a first device is obtained; when it determines that the actual position exceeds preset normal areas of the first device, an early warning prompting message is transmitted to a second terminal associated with the first device; the second terminal receives the early warning prompting message and the current position of the second terminal; and whether the distance between the current position and the actual position is greater than a sett threshold value is judged, if the distance is greater than the sett threshold value, a security early warning program is executed, otherwise, early warning prompting is relieved. With the position-based security early warning method, the terminal and the system of the invention adopted, the effect of nursing of a device carrier can be greatly improved, positioning accuracy requirements for the device are low, and power consumption requirements for the device can be reduced.

The invention relates to a priori analysis based iterative method for segmenting characters of a licence plate. Method comprises the following steps of: firstly, preprocessing the image of the licence plate, segmenting the preprocessed image of the licence plate by utilizing the vertical projection method, calculating the parameter of each character block, and carrying out preliminary screening according to the parameters; secondly, carrying out binaryzation on the characters processed by preliminary screening by utilizing the threshold value iteration method, calculating the priori knowledgecontained by each character block according to the standard licence plate system, and obtaining the characters processed by secondary screening; and thirdly, calculating the quantity of blocks of thecharacters processed by secondary screening, calculating the width of characters of the licence plate and the mean width of all characters under the condition that set conditions are met, and determining whether ultimate characters can be obtained or not according to the two parameters, or carrying projection again when the set conditions are not met. The method reduces the requirement on positioning accuracy of the licence plate, overcomes the adverse effects due to a complex background, eliminates the common segmentation results of conglutination, breakage and the like of the other methods,and further improves the accuracy of segmentation.

The invention relates to radiation therapy system. The system includes a five-degree-of-freedom O-shaped arm radiation therapy device and a six-degree-of-freedom parallel radiation therapy bed. The five-degree-of-freedom O-shaped arm radiation therapy device includes an O-shaped arm movement mechanism, a linear accelerator device, a radiation dose detection device and a double-X-ray machine image positioning mechanism. The O-shaped arm movement mechanism includes an O-shaped arm, an accelerator displacement device, a rotational displacement device, a turning displacement device, a horizontal transverse displacement device, and a horizontal longitudinal displacement device. The double-X-ray machine image positioning mechanism includes an X-ray transmitter and receiver. The six-degree-of-freedom parallel radiation includes a base assembly, a connecting rod assembly and a bed plate assembly. The radiation therapy system of the invention achieves five-degree-of-freedom control of a radiation therapy process with high control accuracy and stability, and has flexible spatial positions and high positioning accuracy of the radiation therapy bed.

The invention provides an automatic plug-in machine. The automatic plug-in machine comprises a machine seat and a printed circuit board (PCB) transmission device, a mechanical arm, a first charge coupled device (CCD) recognition device and a component feeding mechanism which are arranged on the machine seat, the first CCD recognition device is used for pin recognition of an electronic component, the mechanical arm comprises a fixed end and a free end, the fixed end is used for installing and fixing, the free end is used for acquiring the component and a plug-in, a transmission mechanism is arranged between the free end and the fixed end, a component fixture and a second CCD recognition device are arranged at the free end of the mechanical arm, and the second CCD recognition device is used for recognizing and positioning a PCB. The automatic plug-in machine provided by the invention can be suitably used for automatic plug-in operation of a large amount of electronic components, manual labor is completely substituted, and the production cost is saved; and with the dual and automatic compensation of the component and PCB, the installation accuracy is high, and the reject ratio is reduced.

The invention relates to the field of a picking end effector, in particular to a large-tolerance strawberry picking end effector capable of picking up multiple strawberries once based on a hand-eye system, and a working method thereof. The invention aims to provide a strawberry picking end effector which can pick up clustered fruits, has low demanding degree on picking positioning of a mechanical arm, and a working method thereof. According to the picking end effector and the working method, the strawberry fruit region (single grain or adjacent graininess mature strawberry fruits) is taken as the picking objects; the separation of adhering mature fruits is not necessary; the algorithm complexity and calculation time consumption of identifying and positioning the target fruits can be reduced; the image degree coordinate of the target fruits can be exactly converted into a world coordinate according to an internal reference and an external reference of a camera, and the positioning precision and speed can be improved; many strawberries can be picked up once; under the condition that the mature fruits are close or adhered, the picking efficiency can be greatly improved; the picking end effector has large-tolerance; under the condition that the positioning precision on the mechanical arm is not demanding, the picking success rate can be improved.

An electroluminescence display device is provided in which a plurality of pixels are arranged in row and column directions, including: a gate line extending in the row direction; a first thin film transistor whose gate is connected to the gate line; a drain line extending in the column direction; a capacitor connected to the drain line via the first thin film transistor; a second thin film transistor whose control electrode is connected to the capacitor; and an EL element connected to a supply line via the second thin film transistor and having a luminescent layer between an anode and a cathode. The first thin film transistor is disposed in a region between the gate line and the capacitor.

A sine propulsion mechanism with adjustable swinging amplitude for robot dolphin is composed of machine frame, main motor, amplitude regulating motor, mainshaft with slide sleeve having ring slot, a conversion box with internal gear and external horizontal U-shaped and curved rack bars, a drive fork screwed on leading screw, a short axle inserted in vertical guide track, a horizontal slide way, and a rockerarm for controlling the tail swinging.

The invention provides a detection device for surface-shape errors of a solar trench type curved surface reflector, relating to the field of mirror surface detection, which solves the problems that the when the surface-shape errors of the trench type curved surface reflector are detected by the conventional detection device, the detection process is complicated and time-consuming and is not suitable for rapid and online detection, and the subsequent image processing is complicated. The device comprises a light source device, a self-calibration device and an image acquisition and processing device, wherein the light source device comprises a laser, a beam expander and a beam splitter group; light beams emitted from the laser are expanded by the beam expander, are split by the beam splitter group and are reflected; a test light beam split by the beam splitter group is projected on the curved surface reflector to be detected; a self-calibration light beam reflected by the beam splitter group is transmitted into the self-calibration device; the self-calibration device is used for calibrating the parallel degree of the test light beam projected to the curved surface reflector to be detected; and the image acquisition and processing device is used receiving light spot information reflected by the curved surface reflector to be detected and determining the surface-shape errors of the curved surface reflector to be detected. The detection device is easy to operate and has low cost.

The invention relates to a device for measuring the diameter of a large shaft working piece by non-contact-type online measurement, which solves problems of heavy detection tools, inconvenient operation and low measurement precision and measurement efficiency during precisely measuring a machined workpiece with large diameter. Three guide rails are arranged on a tripod head of a measurement base and connected by screws and threads; an upright post is mounted on the base and sleeved with four guide rail sliding blocks and provided with locking screws; sliding plates which are fixed on upper and lower guide rail sliding blocks have same length and provided with respective sensors connected by locking screws; two guide rail sliding blocks sleeved in the middle of the upright post are provided with sliding plates and sensors connected by locking screws; the length of sliding plates of the middle guide rail sliding blocks is smaller than the upper sliding plate and the lower sliding plate; the sensors are connected with a computer by cables; symmetric supporting seats are fixedly mounted on a calibration base, connected with a rotating shaft and provided with bearings; the center of the rotating shaft is provided with a large disc and a small disc the diameters of which are different; an adjustable-speed motor is connected with a bracket and fixed on the calibration base; the shaft of the adjustable-speed motor is connected with one end of the rotating shaft the other end of which is connected with a rotating speed coder fixed on the bracket of the calibration base; and a measurement base and the calibration base are connected by a large platform.

The invention provides a strip line waveguide switch, which comprises a laminated combined body consisting of an upper strip line floor (1), a strip line (3), a matching unit (6) and a lower strip line floor (7), wherein the upper strip line floor (1) is fixedly connected onto a waveguide interface (9) of a standard waveguide (8); the strip line (3) is provided with metallized via holes (5); the upper strip line floor (1) and the lower upper strip line floor form navigation-limiting electromagnetic wave energy through the metallized via holes on the strip line (3) and the navigation-limiting electromagnetic wave energy only enters a carinal cavity transmitted by a main die of the standard waveguide, so that the energy is concentrated at the periphery of a clearance formed between two ends of the matching unit (6) and the wide side of the standard waveguide and the strip line is transmitted to the standard waveguide. The invention has the advantages of low insert loss, high conversion efficiency, simple and compact structure and low requirement for the positioning precision of the connection, can be connected by screws and is especially suitable for a Ka waveband transmission line mode.

The invention discloses a force-controlled flange for the polishing operation of an industrial robot and a polishing method. The force-controlled flange comprises an upper base, a lower base, an air spring and a proportional valve. The upper base and the lower base are arranged in a spaced mode up and down. The air spring is arranged between the upper base and the lower base. The proportional valve can adjust the pressure in the air spring. A displacement sensor is arranged between the upper base and the lower base. The proportional valve comprises a pressure sensor for monitoring the pressure in the air spring. According to the force-controlled flange for the polishing operation of the industrial robot and the polishing method, the adjustment of the contact force can be achieved; the requirement for position precision of the industrial robot in the polishing process is lowered; the production cost is reduced, and the quality of products can be improved. The force-controlled flange is simple in structure, convenient to control and easy to popularize in a grinding production line. A ball spline is selected for replacing a guiding rail and a rectilinear motion ball bearing, and the rotational degree of freedom is restrained, accordingly, the influence of the radial force (relative to the guiding rail) can be better eliminated.

The invention discloses a socket and spigot joint type connection structure for a bridge prefabricated pier stand column and a bearing platform. The structure comprises the stand column and the bearing platform, the stand column comprises an exposed end and an embedded end, the bearing platform is provided with a stand column installing groove in the vertical direction, the cross section shape and the size of the stand column installing groove are matched with the cross section shape and the size of the embedded end so that the stand column can be embedded in the stand column installing groove, and the gap between the outer wall of the embedded end of the stand column and the inner wall of the stand column installing groove is greater than or equal to 2 cm; mud jacking holes are formed in the top face of the bearing platform, first mud outlets are formed in the bottom face of the stand column installing groove, and a mud jacking channel is formed between each mud jacking hole and the corresponding first mud outlet. The invention discloses a splicing method of the socket and spigot joint type connection structure. According to the socket and spigot joint type connection structure for the bridge prefabricated pier stand column and the bearing platform and the splicing method of the socket and spigot joint type connection structure, it is not needed to pre-bury a large number of pre-buried parts in the prefabricated stand column or the bearing platform, the positioning accuracy requirement for site operation is low, the adjusting redundancy is large, and requirements for construction machinery and the like are not high; site steel bar binding and welding and large-scale concrete pouring work are not needed, and site installation is fast, convenient and small in working load.

The invention provides a sea-land dual-purpose self-powered unmanned aerial vehicle navigation assurance base station. The sea-land dual-purpose self-powered unmanned aerial vehicle navigation assurance base station comprises a wind-solar hybrid generation layer, an unmanned aerial vehicle supply layer, a core component layer and a support which are arranged in sequence from top to bottom. The wind-solar hybrid generation layer comprises a solar power generation device and a wind power generation device. The unmanned aerial vehicle supply layer comprises a charging platform, a guiding module and a charging module which are located on the charging platform. The core component layer comprises an energy storage unit, a control circuit and an information relay module. The energy storage unit is used for storing electric power generated by the wind-solar hybrid generation layer. The control circuit is used for controlling the opening and closing of a solar panel which is used as a cabin door of the unmanned aerial vehicle supply layer, and performing the electric power supply switching of the solar power generation device, the wind power generation device and the energy storage unit. The information relay module is used for strengthening and relaying signals collected by the unmanned aerial vehicle within a signal range to transfer to a shore-based management center. The design of the sea-land dual-purpose self-powered unmanned aerial vehicle navigation assurance base station prolongs the cruise duration of an unmanned aerial vehicle and expands the cruising range.

The invention provides a bag-of-word model based vehicle type identification method for an unlicensed vehicle at a gate. The method comprises: firstly, finishing vehicle detection based on a histogram; finishing vehicle face positioning based on gradient density; performing vehicle type classification based on a bag-of-word model, which comprises two parts of training and testing; and for the problem of poor classification effect caused by correlation of throwaway vocabularies of the bag-of-word model, constructing spatial information. When the spatial information is constructed, the spatial information is divided into two parts of global spatial information and local spatial information to perform calculation, wherein the global spatial information is obtained from a spatial angle relationship between image blocks with the same marks; the image blocks, with the same marks, of an image are sorted according to distances between the image blocks and an origin first, included angles between two adjacent image blocks and a horizontal axis are calculated in sequence, and global angle histogram information about each mark is subjected to statistics; and for the local information, a local frequency histogram of occurrence of the blocks with the same marks is calculated with a specific method. The histograms of the global information and the local information are combined to finish the construction of the bag-of-word spatial information. The method is relatively high in accuracy, has relatively low vehicle face positioning requirements in positioning accuracy, is short in running time, and can meet general application requirements.

The invention relates to an X-ray-imaging automatic exposure control method, a storage medium and medical equipment. According to one execution mode, the X-ray-imaging automatic exposure control method includes the steps that a to-be-detected object is pre-exposed with the set pre-exposure dose Mp, and a low-dose exposure image is obtained; the outline of the to-be-detected object is determined onthe low-dose exposure image; on the low-dose exposure image, based on a selected pixel position, an interested region ROI is defined in the outline range of the to-be-detected object; the average pixel value G<ROI> of the interested region ROI is calculated; according to the average pixel value G<ROI>of the interested region ROI, the main exposure dose Mr is calculated. According to the X-ray-imaging automatic exposure control method, the storage medium and the medical equipment, a physical AEC chamber does not need to be used, and the requirement for the placement accuracy is reduced while the image quality is guaranteed.

The invention relates to the technical field of magnetic coupling resonance type wireless power transfer, in particular to a dynamic stable endurance wireless charging system for an unmanned aerial vehicle. The system comprises the unmanned aerial vehicle, a charging platform, a power transmitting unit and a power receiving unit, the power transmitting unit is arranged in the charging platform, and the power receiving unit is arranged on the unmanned aerial vehicle; the power transmitting unit transmits energy to the power receiving unit. By means of the wireless charging system, the error-tolerant rate between a transmission coil and a receiving coil is increased; dynamic stable endurance wireless charging can be achieved; a matrix type transmission coil is adopted, the coupling coefficient between the transmission coil and the receiving coil is increased, and the overall efficiency of the system is improved; the receiving coil adopts a three-dimensional five-coil structure, and the intensity of a magnetic field parallel to the plane where the transmission coil and the receiving coil are located is fully utilized; therefore, waste of a transmission coil non-directional magnetic field is reduced, and by means of a positioning auxiliary cover installed above a charging area, the requirement of the positioning precision is lowered.

The invention belongs to the field of license plate character image processing, in particular to a license plate character segmentation method after the license plate is accurately positioned by an intelligent transportation system. Aiming to solve the problem that the character radical is considered to be the background and is cut due to the local minimum caused by a horizontal projection method, the invention provides a novel method for analyzing and segmenting the license plate characters; and according to the principle that elements belonging to the same character form a connected domain, and combined with the fixed proportion relation of the fixed height and space of the license characters, the segmentation problem of the characters of the automobile license plate under complex condition is better solved, thereby lowering the requirement for accurately positioning the license plate.