173results about How to "Meet the positioning requirements" patented technology

The invention discloses a thrust distribution method for a power positioning system of an offshore drilling platform, which solves the problem of thrust distribution optimization of the power positioning system by applying a particle swarm algorithm through taking minimized propulsion system power consumption and a thrust error as target functions of the thrust distribution optimization and considering the thrust, thrust change rate, azimuth change rate and constriction conditions of a thrust forbidden sector. The method comprises the following steps of setting input quantity of the thrust distribution, including vertical resultant force, transverse resultant force and yawing moment, as given parameters; setting the thrust amplitude and direction of each thruster as unknown variables, namely, solutions to be optimized; analyzing platform stress, wherein the resultant forces and resultant force moments generated by all the thruster are equal to the input quantity of the thrust distribution; and building a thrust distribution mathematical model according to the distribution of offshore drilling platform thrusters and applying the particle swarm algorithm to solve the problem of thrust distribution optimization. The thrust distribution method has no special requirements to the target functions of the thrust distribution and less parameter to be regulated, is simple in operation, easy for realizing and fast in calculation speed, so that the requirement of high real-time capability of the power positioning system is fulfilled.

The present invention relates to a method to measure dose distribution in a patient-shaped phantom with high accuracy. The invention consists of a method of measuring dose distribution in a phantom for radiation therapy treatment verification, a detector configuration in such a phantom, detector improvement and measurement methodology to enable application of correction factors in an accurate way.

The invention discloses a quick replacement visual positioning system for a mechanical arm tool in a nuclear environment and a positioning method, and relates to the technical field of special equipment. The quick replacement visual positioning system comprises an image acquisition unit, a target feature extraction unit, a target position and pose calculation module, a mechanical arm attitude calculation module and a mechanical arm control system which are communicated and connected in sequence, and is characterized in that the target feature extraction unit is further communicated and connected with a camera calibration module, and the target position and pose calculation module is further connected with a hand-eye calibration module, thereby solving a problem of how to quickly and accurately position a tool to be clamped on a tool placement frame by a mechanical arm tail end tool clamping head during the process of tool replacement in a radioactive environment, improving the efficiency of tool replacement, realizing multiple purposes of a manipulator, reducing the cost of nuclear three-waste processing, and improving the working efficiency of nuclear three-waste processing.

In a lithographic projection apparatus, a measuring system configured to measure the position of the projection system relative to a reference frame includes sensors rigidly mounted in relation to counterpart sensors of a measuring system measuring the substrate table position. An angular encoder which sends light from a target down two optical paths having opposite sensitivities to tilt is used to measure rotation of the projection system about its optical axis.

The invention provides an intelligent terminal positioning method and system and relates to the technical field of mobile positioning. The intelligent terminal positioning method comprises the steps that the accelerated speeds of an intelligent terminal at different times are acquired, and a curve of the relation between the accelerated speeds and the times is generated; the motion state and the displacement of the intelligent terminal are obtained according to the curve of the relation between the accelerated speeds and the times; a positioning mode is selected according to the motion state and the displacement of the intelligent terminal, and positioning is conducted in the selected positioning mode, wherein positioning modes include the base station positioning mode, the intelligent positioning mode and the GPS positioning mode. According to the intelligent terminal positioning method and system, the three positioning modes are set, the positioning modes can be switched automatically by the intelligent terminal according to the motion state and the displacement of the intelligent terminal, positioning power consumption is reduced on the premise that the positioning precision is guaranteed, and the requirements of people for positioning precision and positioning power consumption are met.

The invention discloses a vehicle wireless positioning method and a vehicle wireless positioning method system in a parking lot. The method comprises the following steps: transmitting a positioning request to a landmark reference node arranged in the parking lot through a vehicle node arranged in a vehicle to be positioned, wherein the landmark reference node is arranged between two adjacent parking spaces in the parking lot; after the landmark reference node receives the positioning request transmitted by the vehicle node, transmitting a positioning reply to the vehicle node; and after the vehicle node receives the positioning reply transmitted by a preset quantity of landmark reference nodes, calculating vehicle position information through the vehicle node or other entities according to the preset quantity of positioning replies and in combination with the position information arranged by the preset quantity of landmark reference nodes in the parking lot and realizing vehicle positioning. The vehicle wireless positioning method and the vehicle wireless positioning method system disclosed by the embodiment of the invention have the beneficial effects that the accuracy of the vehicle positioning can be effectively improved, and the lower cost and the lower complexity are realized, so that the requirements that the parking lot is accurately positioned, and the realization is simple are satisfied.

The invention provides an annular elastic pair-containing three-degrees-of-freedom micro operating table, which comprises a fixed platform, a movable platform, micro-displacement driving devices and three branched chains connected between the fixed platform and the movable platform, and is characterized in that: three micro-displacement driving devices are arranged on the fixed platform; each branched chain comprises an elastic sliding pair and an annular elastic pair, wherein the side wall of the annular elastic pair is fixedly connected with the movable platform and one side of the elastic sliding pair respectively; two connecting parts are positioned on the same plane passing through a centre line of the annular elastic pair; and the middle part of the other side of the elastic sliding pair is fixedly connected with a driving end of each micro-displacement driving device. By introducing the annular elastic pair to construct a parallel micro operating table, due to the characteristic of short branched chains, the accumulative error is small, the operating table has higher bearing capacity and higher rigidity, and the movable platform can output two-dimensional translation and one-dimensional rotation around a normal vertical to a translational plane.

The invention belongs to the technical field of medical apparatus, and in particular relates to a set of spinal surgical positioning device, which consists of longitudinal railings, transverse railings and positioning symbols. The spinal surgical positioning device is characterized in that: the longitudinal railings and the transverse railings are fixedly connected two by two to form a grid structure, and the positioning symbols are positioned at connecting positions among the longitudinal railings and the transverse railings; or two transverse railings are provided, the two ends of each longitudinal railing are connected with the two transverse railings to form a structure like a Chinese character 'mu' meaning eyes respectively, and the positioning symbols are positioned on the longitudinal railings, wherein the plurality of positioning symbols have different shapes and are distributed and welded on the railings uniformly. The positioning symbols can be identified conveniently due to the different shapes, thereby judging a corresponding position accurately. The spinal surgical positioning device is simple in structure, accurate in positioning and convenient in use, and can meet the requirement of spinal surgical positioning.

The invention discloses a wireless node relative positioning method based on differential global positioning system, which belongs to the technical field of wireless communication. Nodes start positioning competition after an synchronization with a GPS module, a node with successful competition sends a positioning request, and other nodes enter a positioning response state after receiving the positioning request; At the positioning time of arrival specified by the positioning request, the node starts sampling the GPS module output, and the node in positioning response returns a positioning response composed of the positioning data and the positioning information back to the node sending the positioning request; and the node receiving the positioning response processes the positioning data, if satisfying the positioning calculation condition, the relative position between two nodes are calculated and the calculation result to the node sending the positioning response is sent in wireless way, otherwise, the positioning response is discarded. The invention can obtain higher positioning accuracy of relative position under the conditions of being unable to determine the accurate position of the reference station, with a shifting reference station or without a stationary reference station.

The invention discloses an instrument positioning method applicable to a substation patrol inspection robot, which is characterized in that firstly preliminary positioning is performed on an image to be detected by using an Adaboost classifier, then secondary positioning is performed on a plurality of candidate regions acquired by positioning by using an SVM classifier, and a region which is judged to be an instruction in the two times of positioning is the regional location of the instrument in the image. According to the invention, regions similar to the instrument are positioned by using the Adaboost classifier, so that the detection rate of the instrument is greatly improved; deficiencies of the Adaboost classifier are made up by using the SVM classifier, color features and textural features are fused, and finally the candidate regions are accurately classified. The instrument positioning method not only improves the detection rate, but also increases the expandability of the system, and meets requirements of a substation for instrument positioning.

The invention provides a magnetic sensor array based rotation-movement magnetic anomaly target detection device and method. The device comprises a magnetic sensor array, a rotation mechanism, a rotation angle collection module, a GPS module, a signal collection module, a data processing module and a power supply. The geographic coordinate of a detected target is determined according to magnetic field information, collected by the magnetic sensor array, of the magnetic anomaly target, the rotation angle of the rotation mechanism, and the real-time geographic position of the magnetic sensor array. Dynamic measurement is carried out by circular motion, more comprehensive magnetic anomaly information is obtained, and a positioning result is more accurate.

The invention relates to a combined antenna, in particular to an iridium and GPS (Global Positioning System) combined antenna for an underwater robot. The iridium and GPS combined antenna comprises an antenna adapter component, a fixed base, a connecting pipe and an antenna assembly which are sequentially and hermetically connected, wherein the antenna adapter component comprises a watertight cable, a setting framework, a connector locating ring and a coaxial connector; the setting framework is hermetically connected with the fixed base; one end of the setting framework is provided with the connector locating ring; the coaxial connector is inserted into the connector locating ring, and one end of the coaxial connector is connected with the watertight cable; the watertight cable is hermetically connected with the setting framework; the antenna assembly comprises an antenna housing fixing piece, an iridium antenna, a GPS antenna and an antenna housing; one end of the antenna housing fixing piece is in hermetical and threaded connection with the connecting pipe, and the other end of the antenna housing fixing piece is hermetically connected with the antenna housing; the iridium antenna and the GPS antenna are both encapsulated in the antenna housing and are respectively connected with the other end of the coaxial connector by virtue of a coaxial signal wire. The iridium and GPS combined antenna has the advantages of simple structure, good underwater sealing property and antenna signals, easiness for installation and the like.

The invention discloses a heavy truck fuel tank oil shaking characteristic testing device and method, and belongs to the technical field of oil tank testing. The device comprises a power unit and a test piece connecting unit, the power unit comprises a bottom frame and a driver, the bottom frame is fixedly arranged on the ground, the driver is installed on the bottom frame, and a reciprocating transmission mechanism is arranged at the output end of the driver; the test piece connecting unit comprises a sliding bracket, a fixed bracket and an oil tank connecting piece; the sliding support is slidably arranged on the bottom frame, the sliding bracket is movably connected with the reciprocating transmission mechanism; first hinge supports are fixedly connected to the middle positions of the front side and the rear side of the sliding bracket, second hinge supports are fixedly connected to the middle positions of the front side and the rear side of the fixed bracket, the two second hinge supports and the corresponding first hinge supports are jointly connected with connecting pins, an elastic buffer structure is connected between the fixed bracket and the sliding bracket, and the oil tank connecting piece is fixedly installed on the fixed bracket. The motion condition of the fuel tank of the heavy truck is truly simulated, and a positive effect is achieved for the structural improvement or research and development of the fuel tank.

The invention provides a dual-translation orthogonal decoupling parallel micro-positioning platform which comprises a motion workbench, a fixed platform, four pairs of motion branched chains and two driving branched chains, wherein the motion branched chains and the driving branched chains are connected between the motion workbench and the fixed platform. The dual-translation orthogonal decoupling parallel micro-positioning platform is characterized in that the motion workbench is a cube, two adjacent side faces of the motion workbench are provided with horizontal semicircular grooves, the fixed platform is a rectangular block with a square groove in the middle, one ends of the motion branched chains are correspondingly connected with the four side faces of the motion workbench, the other ends of the motion branched chains are correspondingly connected with the four side faces of the square groove of the fixed platform, the two drive branched chains are drive blocks, wherein two side faces opposite to each other of the two drive branched chains are respectively provided with a horizontal semicircular groove and circular pressing marks, the side face, with the horizontal semicircular groove, of each drive block is pressed on the side face, with the horizontal semi circular groove, of the motion workbench through a hard ball, and the side face, with the circular concave marks, of the drive block is connected with the fixed platform through a piezoelectric ceramic driver. The dual-translation orthogonal decoupling parallel micro-positioning platform can completely achieve completely-decoupled dual-freedom degree translation, and the motion branched chains enhance the rigidity and bearing capacity of the micro-positioning platform.

The invention discloses a vacuum centrifugal static spinning device, which mainly consists of eight major systems including a transmission system, a feeding system, a heating system, a sealing system, a spinning system, a collecting system, a temperature control system and a box body system, and is used for melt or solution centrifugal electrostatic spinning. The transmission system drives a yarn spraying device to rotate at a high speed, a receiving device is connected with a high-voltage power supply, the heating device heats polymer particles, a melt is stored in the yarn spraying device, an infrared temperature measuring instrument measures the temperature through emitting infrared rays and feeds back the result to the heating system for controlling the spinning temperature, under the effect of centrifugal force and electrostatic force, the melt is spun out, and nanometer level fiber is formed on the collecting device. In the whole spinning process, a transmission device, a feeding device and a magnetic fluid sealing device are positioned in a protection box body, the heating device, the yarn spraying device, the collecting device and a temperature control device are positioned in a vacuum box. The vacuum centrifugal static spinning device has the advantages that no disturbance of jet flow in vacuum environment can be ensured, and the goal of more stably preparing high-performance and high-quality nanometer fiber is achieved.

A mass spectrometer is disclosed having a mass analyser with a mass-to-charge dispersive element for separating ions according to their mass-to-charge ratios along a dispersive plane and an ion deflector to deflect ions leaving the mass analyser in the dispersive plane. A shielding arrangement, located between the dispersive element and the ion deflector is arranged to define the portion of the beam to be deflected by the ion deflector. The deflected beam is steered onto a beam defining aperture, located at the focal plane of the mass analyser is detected by at least one ion detector, located downstream from the beam defining aperture.

A device for welding plastic profiles, including at least two carriages for holding plastic profiles, stoppers for adjustment, stoppers for welding and at least one heating element. The motion of the plastic profiles can be controlled by the device during the welding in such a way that optionally at least two plastic profiles which have to be connected with each other move against each other or one plastic profile stops and the other moves toward it.

The invention discloses a method and system for supermarket shopping guide based on Bluetooth iBeacon. The system is composed of a mobile terminal, a server, a database and a plurality of iBeacon modules arranged in a supermarket. The mobile terminal collects a shopping list established by a user according to a commodity information table; a shopping route is planned based on the shopping list andlocation information of the mobile terminal of the user and the iBeacon modules send message information to the mobile terminal, wherein the message information includes location information; the server calculates the location information of the mobile terminal and returns the result; and the database stores the commodity information table, the location information of the iBeacon modules in areasof all types of commodities, and signal information of connection between the mobile terminal and all iBeacon modules. According to the invention, the mobile terminal device obtains information and plans the optimal route, so that lots of time is saved and the shopping efficiency is improved; and the iBeacon is used as the support for the indoor positioning technology, so that the cost is loweredand the positioning accuracy is improved.

The invention discloses a method for three-dimensional positioning. The method is used for performing three-dimensional positioning on a to-be-positioned object in an interested space, and three-dimensional space coordinates and the direction of the to-be-positioned object are reflected through three-dimensional space coordinates of a photosensitive sensor of a positioning device assembled on the to-be-positioned object. The method comprises a step a) of performing timing on a plurality of light sources having the same emission wavelength, and determining the time and sequence of scanning an interested space by the light sources; a step b) of using plane laser to scan the interested space according to the scanning sequence, so as to irradiate the photosensitive sensor located in the interested space; a step c) of recording time data of the photosensitive sensor subject to plane laser irradiation; a step d) of judging validity of the recorded time data; a step e) of calculating the three-dimensional space coordinates of the photosensitive sensor according to the valid time data; and repeatedly executing the steps b) to e) until the execution of the method is stopped. Moreover, the invention further discloses a system for three-dimensional positioning.

The invention discloses a corrugated case linkage production method. The corrugated case linkage production method includes the following steps which are sequentially executed on a production line, the steps include that corrugated paperboards are subject to die cutting molding and waste removing in a flat pressing and flat die-cutting machine; connecting points between paperboard units are broken on a sheet dividing machine; left-and-right paper neatening is carried out on the corrugated boards obtained after sheet dividing; case pasting and packaging are carried out; front-and-back paper neatening and left-and-right paper neatening are carried out on a packaged corrugated case; and stacking and film winding are carried out. The invention further discloses the linkage production line for implanting the above method, the linkage production line sequentially comprises the flat pressing and flat die-cutting machine, a paperboard rotating machine, the sheet dividing machine, a left-and-right paper neatening mechanism, a paper feeding machine, a case pasting machine, a packaging machine, a paperboard positioning machine, a robot stacking machine and a winding machine, and the production line controls communication and speed synchronization of all single-unit equipment through a central electronic control system. According to the method and the production line, the production efficiency of the corrugated case is improved, and the production cost is reduced.