73results about How to "Accurate spatial positioning" patented technology

A parking space detection device and method thereof, wherein, firstly, store a plurality of border data relating to moved distance of a vehicle, and distance between vehicle and an obstacle for reverse transmission of ultrasonic waves; then determine if said border data satisfy evaluation conditions, such that it is in a first detecting parking space then obstacle state, or in a first detecting obstacle then parking space state. Wherein, in case that any of evaluation conditions is satisfied, start to calculate a first difference between each of said border data and their average, to determine if it is grater than a standard deviation; in case that answer is positive, fetch at least two data points, a first data point and a second data point, corresponding to border data, then calculate their difference to adjust weights of first data point and second data point, in obtaining a highly accurate parking space.

A device and method for joining and tacking several individual components independently of shape and/or size to form inherently rigid, transportable sections for transportation vehicles, such as an aircraft is disclosed. According to one embodiment of the invention, the individual components may be spatially positioned relative to each other independently of shape and/or size. The spatial positions of the individual components may be determined by a measuring device, such as a laser measuring device, and varied via several positioning devices until a preset spatial position of the individual components has been reached in which the individual component are tacked together to form a section. In another embodiment, the positioning devices may be designed as base positioners, a first lateral positioner, a second lateral positioner, an upper positioner as well as an inner positioner. Joining and tacking of several individual components 1 may form varying sections such as sections with varying cross sectional geometries and/or cross sectional dimensions and/or linear dimensions for different types of aircraft or for derivatives of the same aircraft types. In addition, the sections may have two working platforms on either side of the section.

The embodiment of the invention discloses a suspended-cable parallel robot for coal bunker inner wall defect detection. The suspended-cable parallel robot for coal bunker inner wall defect detection comprises a visual detection movable platform, four servo mechanisms, four pulley mechanisms and four flexible cables, the four pulley mechanisms are fixed to the four corners of a coal bunker correspondingly, and the visual detection movable platform is connected with the four flexible cables and connected with the four servo mechanisms through the four pulley mechanisms in a winding manner. The embodiment of the invention further discloses a control method of the suspended-cable parallel robot for coal bunker inner wall defect detection. By adopting the suspended-cable parallel robot for coalbunker inner wall defect detection and the control method, precise space positioning and real-time visual image processing of a visual detection pan-tilt are achieved, a traditional manual detectionmode is replaced, the working efficiency is greatly improved, and the maintenance cost of equipment overhauling is reduced. The suspended-cable parallel robot for coal bunker inner wall defect detection has the characteristic that in the moving process, even though a cable installing plate is uneven, a camera still can keep horizontal operation, and a novel solution is provided for unstability ofan end effector in the moving process of the suspended-cable parallel robot.

The invention relates to a milling tool that is formed for the hobbing of a workpiece having cogs, such as cogwheels, racks and the like, and comprises a cylindrical tool body that defines a rotation axis and comprises a plurality of disc-shaped segments. Each one of the segments includes a hub part having two opposite plane-parallel end surfaces, which extend perpendicular to the rotation axis, and a peripheral cam having a plurality of tangentially spaced-apart milling inserts. Bordering segments are detachably interconnected by means of one each of male and female members co-operating in pairs. The male and female members are situated so that the rotation axis extends through the male and female members. The male and female members include each a contact surface, which converges from a big end toward a small end and which, in a cross-section across the rotation axis, forms an out-of-round curve. The contact surfaces of the male and female members are dimensioned so that they, when the male and female members are being brought together, direct their two bordering segments toward an end position that is centred and mutually angularly determined by the out-of-round cross-section curve around the rotation axis and where the plane-parallel end surfaces abut against each other. In addition, the invention relates to an individual segment as such.

The invention provides an intelligent perception and identification method and device for a warehouse, and electronic equipment. The method comprises the following steps that: obtaining a warehouse laser point cloud panorama obtained when a laser radar scans the warehouse, wherein the warehouse laser point cloud panorama is a point cloud stitched image under a pre-constructed warehouse uniform coordinate system; in the warehouse uniform coordinate system, independently carrying out accurate mapping on the spatial region of the warehouse with area attributes and a business perception and identification rule; carrying out point cloud analysis and automatic resolving on the above warehouse laser point cloud panorama to obtain a target and an event to be monitored; according to the corresponding coordinates of the target and the event in the warehouse uniform coordinate system, calling a corresponding pick-up device to carry out video collection and image analysis on the target and the event, and judging the event type of the event; and reporting the coordinate, the event type and the video image of the above target and event. By use of the method, on the basis of the intelligent linkage of the laser radar and video monitoring, the intelligent target and event monitoring and identification of the spatial region of the warehouse can be realized.

The invention discloses an unmanned driving platform real-time target detection system based on a camera and a laser radar. Space-time synchronous pixel-level fusion is performed on original data of acamera and a laser radar; a clustering detection result is obtained by combining the obtained space-time synchronization data with a data analysis method of the laser radar; an improved faster-rcnn network architecture is constructed to perform parameter training and real-time detection; and the type, length, width and height of a target object around an unmanned driving platform, the distance ofa central point relative to the space coordinate of the unmanned driving platform, a yaw angle, a roll angle and a pitch angle are output. According to the system and a detection method thereof, a traditional clustering and artificial intelligence fusion algorithm is adopted, the defects that the image detection space positioning precision is low and the category is difficult to judge through point cloud detection are overcome, and a real-time 3D target detection system based on a camera and a laser radar in an unmanned driving platform scene is realized.

The present invention discloses a method for reducing gradient coil eddy current in magnetic resonance image-forming system. Said invention utilizes the method of reducing diameter of Z gradient coil to reduce the eddy current produced by gradient coil and adopts the mode of changing Z gradient coil winding to ensure that the image-forming space is not changed. Said invention also provides the concrete requirements for reducing Z gradient coil diameter, and said method can effectively reduce the eddy current produced by gradient coil.

A structural element for a fuselage cell structure of an aircraft, in particular a stringer profile or an annular former segment, the structural element being made from a composite material, in particular from a carbon-fibre-reinforced epoxy resin. The structural element comprises at least one positioning aid for facilitating position determination by means of a measuring system. A laser measuring system and/or a tactile measuring system may be used as a measuring system. As a result of the reflector which can be attached to the positioning aid without clearance as a target for the laser measuring system, which is preferably a laser tracker, a spatial position of the structural element in relation to a further component can be determined very precisely and without contact. Following position determination and orientation of the structural element, the reflector can be removed from the positioning aid.

The proposed solution includes the use of four reference bases on the ground at known positions, with a coded time signal transmitted by one of them which is retransmitted by the repeater station and received by each of the reference bases. Using two distinct sets of three reference bases it is possible to calculate the differences between two positions for the repeater station, assigning to the later changes in time, phase or frequency as well as temporal changes due to the signal propagation in the medium, for the respective elevation angles found for the repeater. It can be then identified which values attributed to the temporal changes produces a minimum difference between the two respective positions of the repeater station. The identified temporal change can be used for the correct determination of the repeater station and its use on pertinent applications.

The invention relates to a post-earthquake road disaster area rapid prediction method and system and a storage medium. The method comprises the steps of dividing a research area into a plurality of slope units; obtaining a training set composed of landslide units and non-landslide units based on historical earthquake landslide distribution data; training based on the training set to obtain a landslide probability evaluation model; performing landslide probability evaluation by using the landslide probability evaluation model to obtain a danger unit; and determining a landslide range of each dangerous unit by using a physical mechanical model to obtain a disaster area prediction result of the post-earthquake road. Compared with the prior art, the invention comprises training a landslide probability evaluation model by using a machine learning method to obtain a danger unit with a relatively large landslide probability; then using a mechanical model for researching the dangerous unit, so that the rapid evaluation of the landslide influence on the road in the post-earthquake research area and the accurate space positioning of the road disaster condition are realized. The invention can carry out the rapid evaluation of a wide area space, and provides a reference for the formulation of earthquake emergency rescue measures.

The invention relates to a test bed for realizing fuse of a nuclear magnetic resonance imaging and an in-vivo visible light three-dimensional image of an animal. The test bed comprises a test bed body and an animal fixing device arranged on the test bed body, the test bed body is provided with a marker hole on which a nuclear magnetic resonance imaging marker is packaged, and the test bed body is also provided with a penetrating hole for fluorescence transmission and three-dimensional imaging. According to the invention, the marker on the marker hole can be captured by a nuclear magnetic resonance imaging system and an in-vivo visible light three-dimensional imaging system, and thus the fuse of a nuclear magnetic resonance imaging and an in-vivo visible light three-dimensional image of an animal can be realized.

The invention provides a positioning routing method based on an ultrawideband signal. The method comprises the following steps: sending a ranging request to an ultrawideband base station; to obtain target data returned by the ultrawideband base station; fusing the target data in a real-time scene map, generating a positioning map, and getting a relative position coordinate according to the positioning map; and planning a real-time path from the relative position coordinate to a target coordinate, and arriving the target according to the real-time path. The invention further provides a positioning routing device based on the ultrawideband signal. The method is capable of completing the accurate space positioning by using a minitype ultrawideband signal device, not only effectively reducing the power consumption, but also greatly saving the calculation resources, and completely eliminating the time of running the complicated calculation so as to execute the task efficiently. The method is capable of accurately positioning and routing the different target users in the different running scenes so as to execute the specific service task.

The invention discloses a self-adaptive cotton harvesting method based on binocular vision recognition and an intelligent mechanical harvesting device. The intelligent mechanical harvesting device comprises a mobile platform, a mechanical arm, a picking component and a binocular stereoscopic vision system, the mechanical arm is mounted on the moving platform, the binocular stereoscopic vision system is mounted on a small arm of the mechanical arm; the picking component is mounted at the tail end of the mechanical arm; the picking part comprises a cotton storage device, a compression spring, a motor, a joint hinge, a bionic elastic flexible mechanical claw and a flexible baffle. According to the self-adaptive cotton harvesting method based on binocular vision recognition and intelligent mechanical harvesting device, good cotton images can be segmented through an image processing technology and the like, and the cotton recognition rate is high; an opening and closing degree of the mechanical claw can be adjusted in a self-adaptive mode, cotton of different areas can be picked rapidly, accurately and cleanly, the cotton doping rate is remarkably lowered, and cotton with good quality is obtained.

The invention discloses a three-dimensional dynamic positioning system for a mobile dual-plane X-ray system. The mobile dual-plane X-ray system comprises a first X-ray system and a second X-ray system; the three-dimensional dynamic positioning system comprises a control device, an registration device, a single-calibration device and a double-calibration device; and the control device controls radiation emitters and radiation receivers in the first X-ray system and the second X-ray system to lift, rotate, pitch or/and shift according to feedbacks from the registration device, the single-calibration device or/and the double-calibration device until completion of spatial positioning between the first X-ray system and the second X-ray system. The three-dimensional dynamic positioning system realizes accurate spatial positioning of the mobile dual-plane X-ray system by performing three-stage calibration; and thus, accurate use of the mobile dual-plane X-ray system is achieved.

The embodiment of the invention provides a data processing method of a virtual reality terminal and the virtual reality terminal. A specific application program is installed in the virtual reality terminal, and the virtual reality terminal comprises multiple sensors. The method comprises the steps that the specific application program is operated, and the sensors measure feature distance parameters of the virtual reality terminal in a three-dimensional space where the virtual reality terminal is located; the position where the virtual reality terminal is located at present is determined according to the feature distance parameters. When a user wears the virtual reality terminal and operates the game type application program in a building, the sensors measure and acquire the feature distance parameters of the building three-dimensional space where the virtual reality terminal is located, therefore, the position of the user can be positioned in real time, and accurate space positioning of the user in a virtual reality scene is achieved.

The invention discloses an ultrasonic lens electrode manufacturing method for effectively reducing an acoustic parasitic signal. The method comprises the following steps: processing an acoustic emission surface of a waveguide rod or block of an ultrasonic lens and related acoustic probes; manufacturing and preparing an electrode mold of a special shape according to the size of the acoustic emission surface; cleaning the acoustic emission surface of the waveguide rod or the probe block of the ultrasonic lens and related acoustic probes; preparing an electrode material with a specific shape; cleaning an evaporated ultrasonic lens or probe; mounting and fixing an ultrasonic transducer; preparing and fixing an electrode material of a corresponding polarity on the other side of the ultrasonic transducer; connecting and fixing the electrode material with a related lead; and mounting a metal sleeve for fixation and protection. By adopting the ultrasonic lens electrode manufacturing method, the parasitic signal can be effectively reduced, and the microscopy quality of an ultrasonic microscope system can be improved.

The present invention discloses a spatial positioning system. The spatial positioning system comprises a first light wave scanner, a second light wave scanner, a reflecting or receiving device, a data acquisition module and a calculation module; the first light wave scanner scans a space around a first direction axis and scans the space around a second direction axis sequentially; the second light wave scanner scans the space around the first direction axis or the second direction axis; in the space, the reflecting or receiving device sequentially reflects or receives scanning light waves emitted by the first light wave scanner or the second light wave scanner; the data acquisition module acquires reflected light waves received by the first light wave scanner or the second light wave scanner, or acquires light waves received by the reflecting or receiving device; and the calculation module performs calculation according to the data acquired by the data acquisition module to obtain the spatial position numerical value of the reflecting or receiving device.

The invention discloses a machine tool for repairing the surface of a die. The machine tool comprises a positioning frame mechanism and a finishing head mechanism, the positioning frame mechanism has six spatial degrees of freedom, each movable joint is provided with a graduated scale, the finishing head mechanism adopts five-gear variable-speed transmission, is fastened and mounted at the tail end of the positioning frame mechanism and is used for repairing the surface of the die, the finishing head mechanism adopts a gear with a small transmission ratio during idle stroke, so that the moving time of a grinding head can be shortened, the finishing head mechanism adopts a gear with a large transmission ratio during finishing of the surface of the die, the machining quality of the surface of the die can be improved, the gear is replaced by changing the position of a shifting rod, a worm and gear transmission structure is adopted in the finishing head mechanism, so that transmission is stable, a self-locking function is further achieved, so that the counter-acting force of the surface of the die to the grinding head cannot react on a hand wheel through a transmission mechanism, and the surface of the die can be stably finishing-machined by rotating the hand wheel.