41results about How to "Eliminate the effect of positioning accuracy" patented technology

The disclosed dead reckoning and positioning method combines satellite positioning data and comprises: receiving GPS signal, while detecting continually the vehicle angle and velocity; according to effective satellite number and horizontal error and the latitude and longitude variable error, deciding the reliability of GPS data flow for accurate positioning. This invention has well autonomy and precision, and will play important role in future satellite navigation technique and vehicle drive record technique.

The invention relates to a full-automatic cutting machine of numerical controlled valve, which comprises a machine body, a feeding mechanism, a positioning mechanism, a geared head, a knife rest mechanism, a pushing mechanism and a numerical controlled electric box. The positioning mechanism utilizes a rigid ball base rotary positioning head and a positioning fixture at the end face of a valve disk part in the geared head to realize the full length cutting processing of the valve, and utilizes a flexible ball base rotary positioning head and a positioning fixture at the conical surface of the valve disk part in the geared head to realize the L-check size grooving processing of the valve. The rigid and flexible ball base rotary positioning heads overcome friction between workpieces and a positioner, eliminate the influences of the flat beat of the valve on positioning precision and the length precision of the processed valve reaches + / - 0.025mm. The cutting machine has simple structure, convenient operation and high full-automatic processing efficiency, is applicable to the full length cutting and grooving of the valve, and can be expanded to use the conical surface of the valve to position and process a sandwich groove of a lock and chamfer the end face of a valve rod; therefore, the full-automatic cutting machine has a wide application prospect.

The method comprises: using a repeater coupled-to / integrated-in a location assistant function (LAF) unit as the location assistant device; the network side of the location system can either get TDOA (the time difference of arrival) corresponding to the pilot frequency signal from base station and the TDOA corresponding to the pilot frequency signal of the base station through the repeater, and or get the TDOA corresponding to the pilot frequency signal of LAF unit in the location apparatus; it uses the TDOA corresponding to the pilot frequency of LAF unit and the parameter information of the repeater predetermined at network to abandon the TDOA corresponding to the pilot frequency signals from base station through the repeater, and uses the rest TDOA-namely the TDOA corresponding to the pilot frequency signals from base station and the TDOA corresponding to the pilot frequency signals from LAF unit to make location calculation for the mobile station.

The invention discloses an environment self-adaption multi-target direct locating method which comprises that a locating center first performs grid point division on a location area and assembles point coordinates into a set; then an ideal dictionary pre-established according to a known base station and the point coordinates; the locating center utilizes two steps of an off-line dictionary study method and on-line dictionary study method to dynamically adjust the ideal dictionary and enables the ideal dictionary to be adapted to dynamic change of signal environments, furthermore, loose signals are reconstructed, the grid point position corresponding to a non-zero value in a sparse vector is the determined position of a moving terminal, and the number of the non-zero value is the number of the targets to be located. According to the environment self-adaption multi-target direct locating method, feature parameters of signal delay, angles, strength and the like do not need to be estimated. Due to the fact that the two-step dictionary study methods can enable the ideal dictionary to be adapted to the environments, high locating precision can be obtained, and simultaneously, the method does not need to let a user know the number of the targets to be located in advance.

The invention provides a vector arc stage switching method and device for double rotary balance mass-based dynamic magnetic steel type magnetic levitation workpiece stages, and belongs to a semiconductor manufacturing equipment technology. The device comprises a support frame, a balance mass block, a rotating shaft, magnetic levitation workpiece stages, a workpiece stage measurement device and a workpiece stage drive device, wherein the two workpiece stages work between a measurement station and an exposure station; the positions of the workpiece stages are measured by plane gratings; the workpiece stages are driven by magnetic levitation planar motors; and the two workpiece stages are driven by the planar motors to achieve single-beat arc fast stage switching in the double workpiece stage switching process. According to the vector arc stage switching method and device, the problems that an existing stage switching scheme has multiple beats, a long track, multiple starting and stopping beats, long stabilization time and the like are solved; the stage switching link is reduced; the stage switching time is shortened; and the productivity of a lithography machine is improved.

The invention provides a process method for co-bonding forming of composite I-shaped reinforced wallboards of planes. The method comprises the steps of skin laying and pasting, process cover plate placing, stringer preparing, stringer pre-assembling, stringer and skin combining, stringer mandrel filling, vacuum bag packaging, curing and demolding, wherein in the process cover plate placing step, aprocess cover plate is placed on a laid and pasted skin, and the process cover plate is provided with a plurality of stringer reservation slots for placing I-shaped stringers.

The invention provides an indoor pseudo-satellite differential relative positioning method. A local coordinate system is established in a world coordinate system by using a base station receiver as the origin of coordinates, and the actual position of a user is calculated through formula calculation. The indoor pseudo-satellite differential relative positioning method has the advantages that iterative operation is not required, the risk of engineering implementation is reduced, the indoor pseudo-satellite differential relative positioning method is a feasible practical technology, and is a new differential relative positioning method applicable to indoor pseudo-satellite positioning, the influence of the clock difference between a pseudo-satellite and a user receiver on positioning accuracy in the indoor pseudo-satellite positioning process is effectively eliminated, and positioning accuracy of indoor pseudo-satellite positioning is greatly improved. In addition, compared with an existing conventional differential relative positioning method, the indoor pseudo-satellite differential relative positioning method has the advantages that the calculated amount is not greatly increased, and engineering implementation is easy.

The invention discloses an acoustic emission source positioning method and system based on a linear weighted least square method. The method comprises the following steps: 1) obtaining a mean value reference equation according to a distance time equation between each sensor and an acoustic emission source; 2) obtaining a linear equation set based on the average reference equation; 3) based on thelinear equation set, calculating common least square solutions V (1) and K (1) of intermediate variables V and K so as to estimate a covariance matrix psi of the linear equation; 4) acquiring a weightmatrix W according to the psi, and calculating weighted least square solutions theta (2) and K (2) of acoustic emission source coordinates theta and K expressed by V; 5) substituting theta (2) and K(2) into the mean value reference equation to obtain a unary cubic equation about the V; and 6) solving the unary cubic equation, taking a root closest to V (1) as a V closed-form solution V (2), andsubstituting into theta (2) to obtain a final acoustic emission source coordinate. In the invention, positioning precision is high.

The invention relates to a full-automatic cutting machine of numerical controlled valve, which comprises a machine body, a feeding mechanism, a positioning mechanism, a geared head, a knife rest mechanism, a pushing mechanism and a numerical controlled electric box. The positioning mechanism utilizes a rigid ball base rotary positioning head and a positioning fixture at the end face of a valve disk part in the geared head to realize the full length cutting processing of the valve, and utilizes a flexible ball base rotary positioning head and a positioning fixture at the conical surface of the valve disk part in the geared head to realize the L-check size grooving processing of the valve. The rigid and flexible ball base rotary positioning heads overcome friction between workpieces and a positioner, eliminate the influences of the flat beat of the valve on positioning precision and the length precision of the processed valve reaches 0.025mm. The cutting machine has simple structure, convenient operation and high full-automatic processing efficiency, is applicable to the full length cutting and grooving of the valve, and can be expanded to use the conical surface of the valve to position and process a sandwich groove of a lock and chamfer the end face of a valve rod; therefore, the full-automatic cutting machine has a wide application prospect.

The invention relates to a high-precision indoor positioning method for WiFi signal direct line-of-sight propagation path mining. The method comprises the following steps: collecting channel state information and signal strength of WiFi signals through commercial WiFi equipment; estimating an arrival angle of a propagation path from the positioning target to the WiFi access point; identifying a direct propagation path between a positioning target and a WiFi access point by using embedded representation, and weighting and designing a positioning loss function. The beneficial effects of the method are that the method employs the WiFi devices which serve wireless network communication and are widely deployed to serve indoor positioning at the same time, and eliminates the impact on the positioning precision from a wireless signal multipath effect and noise interference in an indoor complex environment. The method comprises the following steps: capturing channel state information of commercial WiFi in an indoor environment, and decomposing arrival angles and flight time of different multipath components of the target signal arriving at a plurality of WiFi access devices by using the channel state information; therefore, centimeter-level high-precision indoor positioning with zero deployment cost is realized.

The invention discloses a double-end ranging method capable of eliminating the influence of wave velocities. According to the method, the time difference of the arrival of fault trip waveforms to a double-end ranging device and the time difference of the arrival of relay protection closing waveforms to the double-end ranging device are measured, multivariate equations concerning fault positions, traveling wave velocities and line lengths are established, and a fault location is solved according to the equation set; a fitting intersection algorithm is adopted for fault wave header recognition,the precise time of wave headers at two ends is calculated, such kind of algorithm is not affected by a wavelet basis function and decomposition scale and has high adaptability compared with a traditional algorithm in which a double-ended fault location device uses wavelet transformation to obtain a modulus maximum value. Compared with a traditional double-ended traveling wave fault location method which adopts fault tripping waveforms to realize fault location and ranging, the method of the present invention eliminates fault location errors caused by line impedance, traveling wave velocities,line sag and the like, and improves fault location accuracy.

The invention discloses an iBeacon-based indoor positioning method. According to the method, an area to be detected is reasonably divided; a BP artificial neural network is constructed by taking the final signal strength RSSI value of each access point AP in a sub-area as the input and the relative coordinate of a reference point corresponding to the coordinate origin as the output; furthermore, the BP artificial neural network is trained; and then, positioning is carried out. According to the indoor positioning method in the invention, only a sub-area in different types of sub-areas needs tobe trained in a training stage; the training cost is greatly reduced; all reference points do not need to be traversed in a real-time positioning stage; and only prediction needs to be carried out according to trained parameters.

The embodiment of the invention provides a fastener positioning method and device and a readable storage medium, and the method comprises the steps: carrying out the preprocessing of an obtained imagecomprising a to-be-positioned fastener, and obtaining a corresponding edge region image; wherein a plurality of connected regions contained in the edge region image form a first region set; removingdominant noise and dominant interference regions in the first region set based on the shape features of each region in the first region set and the edge region features of the steel rails and the sleepers to form a second region set; based on the shape feature of each region in the second region set and the relative position feature between the regions, obtaining the linear position of the edge ofthe steel rail; based on the shape feature of each region in the second region set, the relative position feature between the regions and the steel rail edge linear position, obtaining the sleeper edge linear position; and obtaining a fastener position based on the steel rail edge linear position and the sleeper edge linear position. The method is high in positioning precision, simple in processing process, small in calculation amount and suitable for detection environments of various speeds.

The invention provides a plane-grating-measurement-based dynamic-magnetic-steel magnetic levitation dual-stage vector arc switching method and device and belongs to the technical field of semiconductor manufacture equipment. The plane-grating-measurement-based dynamic-magnetic-steel magnetic levitation dual-stage vector arc switching device comprises a support framework, a balancing mass block, wireless charging and wireless communication magnetic levitation stages, a stage measurement device and a stage driving device, wherein the two stages work between a measurement site and an exposure site; the positions of the stages are measured by plane gratings; a passive compensation structure formed by both a planar leaf spring and an electromagnetic damper is adopted for motion compensation for the balancing mass block; the stages are driven by a dynamic-magnetic-steel magnetic levitation planar motor; in the switching process of the two stages, the planar motor drives the two stages to achieve quick single-beat arc switching. The invention solves the problem that a conventional switching scheme is more in beat, long in track, more in start and stop process, long in stabilizing time, large in cable interference and the like, the switching processes are reduced, the switching time is shortened, and the productivity of a lithography machine is improved.

The invention discloses a high-reliability stroke positioning method of a bucket wheel machine. Two positioning systems are mounted on the bucket wheel machine. The high-reliability stroke positioningmethod comprises the following steps of S1: obtaining two sets of measurement data, namely DL data and DN data, of a first positioning device and a second positioning device; S2: calculating the distance d1 between the first positioning device to a reference point P and the distance d2 between the second positioning device to the reference point P; S3: performing Kalman treatment on the two setsof data to obtain an estimated optimal distance; and S4: combining a predetermined coordinate of the reference point, calculating a current coordinate position of a big vehicle of the bucket wheel machine. The high-reliability stroke positioning method disclosed by the invention has the advantages of being simple in principle, easy to realize, high in reliability and the like.

The invention discloses a bluetooth indoor micro-positioning system based on an ELMAN neural network. The system comprises a system host, a bluetooth anchoring point and a positioning target, the system host comprises an embedded processor, a bluetooth main node and a communication module, the bluetooth main node (main node bluetooth module) adopts a low-power-consumption bluetooth wireless data transmission module RL-CC2541-S3, a SIM900A is used for communication with a host computer, a CC2541 acquires a host signal intensity indication required by positioning, one bluetooth module is fixed on the positioning target, the system host and the bluetooth anchoring point are arranged in a positioned indoor area, the bluetooth module fixed on the positioning target operates in a host mode, andthe bluetooth main node and the bluetooth anchoring point operate in a slave mode. According to the system, the precision and the stability of the positioning technology are improved, certain adaptability to the environment is achieved, and technical support is provided for implementation of a complex positioning algorithm.

The invention provides an automatic focusing microscopic imaging system for planet surface material in-situ detection. The automatic focusing microscopic imaging system comprises a lighting unit, a microscopic imaging unit, an image acquisition unit, a focusing transmission unit and an upper computer unit; the lighting unit and the microscopic imaging unit are located in the same optical path; the microscopic imaging unit includes a microscope objective lens and a microscope lens barrel; the focusing transmission unit is a gear external-engagement transmission device; the arrangement direction of the focusing transmission unit is perpendicular to the lighting unit; the focusing transmission unit converts the transmission of gears to the movement of the microscope lens barrel; the image acquisition unit and the microscope lens barrel are in the same optical path; the image acquisition unit is connected with the focusing transmission unit; and the upper computer unit carries out definition judgment on an acquired image and controls the whole system to make the same in a focusing state. With the automatic focusing microscopic imaging system of the invention adopted, definition judgment can be carried out on the image of a sample to be detected; a focusing position can be found out quickly through a fitting a focusing function, and therefore, the speed and precision of focusing can be improved. Unitization design is adopted, so that the automatic focusing microscopic imaging system has the advantages of small size, strong function and so on.

The invention discloses a method and a system for adaptively adjusting a positioning signal measurement mode. The method is applied to a mobile communication network system, the mobile communication network system comprises a base station and a terminal, and the method for adaptively adjusting the positioning signal measurement mode comprises the following steps: receiving a terminal positioning request, and obtaining a resident cell ID contained in the terminal positioning request; according to whether the resident cell ID is an independent cell, issuing a measurement instruction of the positioning signal to the terminal / a base station associated with the terminal; and receiving a measurement quantity fed back by the terminal / base station associated with the terminal based on the measurement instruction of the positioning signal, and performing positioning calculation according to the measurement quantity to generate position information. According to the invention, signal measurementcan be carried out based on the optimal measurement mode of the product form when the terminal is located in the coverage areas of different product forms, so that the positioning precision is improved and the user experience is improved.

The invention provides a process method for the co-gluing and forming of I-shaped reinforced wall panels of aircraft composite materials, which comprises the steps of: paving the skin; placing the process cover plate: placing the process cover plate on the paved skin Above, the process cover plate has a plurality of reserved slots for placing I-shaped stringers; stringer preparation; stringer pre-assembly; stringer and skin bonding combination; stringer mandrel filling; Vacuum bagging; curing; demoulding.

The invention provides an ontrack self-correction positioning method based on optical images. The ontrack self-correction positioning method comprises the steps: relevant parameters of a geometric positioning model on a satellite are calibrated through ground control point information, and the calibrated relevant parameters are marked on the satellite; direct positioning is conducted through the geometric positioning model on the satellite by combining with the calibrated relevant parameters, and the positioning result serves as a relative control point of a next frame of data; self-correctionis conducted on the relevant parameters through the relative control point; and whether the self-correction result is reasonable or not is judged, and if the self-correction result is reasonable, therelevant parameters are updated through the self-correction result. A system time-varying error source can be reduced without a ground control point, and the positioning precision is improved; through circulative iteration, influences of elevation change on the positioning precision can be eliminated, and thus elevation library information does not need to be stored during ontrack processing; andthrough double-DSP parallel processing, positioning timeliness can be improved greatly.

The invention provides an active-balance-mass-based dynamic-magnetic-steel magnetic levitation dual-stage vector arc switching method and device and belongs to the technical field of semiconductor manufacture equipment. The active-balance-mass-based dynamic-magnetic-steel magnetic levitation dual-stage vector arc switching device comprises a support framework, a balancing mass block, magnetic levitation stages, a stage measurement device and a stage driving device, wherein the two stages work between a measurement site and an exposure site; the positions of the stages are measured by plane gratings; an active compensation structure consisting of dual-motor crank and rocker mechanisms is adopted for motion compensation for the balancing mass block; the stages are driven by a dynamic-magnetic-steel magnetic levitation planar motor; in the switching process of the two stages, the planar motor drives the two stages to achieve quick single-beat arc switching. The invention solves the problem that a conventional switching scheme is more in beat, long in track, more in start and stop process, long in stabilizing time and the like, the switching processes are reduced, the switching time is shortened, and the productivity of a lithography machine is improved.

The invention relates to a micro-seismic migration imaging positioning method based on multiplication of waveform cross correlation coefficients, and belongs to the technical field of oil-gas reservoir fracture micro-seismic monitoring. The method includes the following steps of: preprocessing actual micro-seismic data; performing subsurface imaging point division, and calculating the travel timeof all imaging points to each receiving point on the ground; for a certain imaging point, eliminating the arrival time difference of the imaging point to different receiving points, calculating the cross-correlation coefficient of a micro-seismic record after the time difference correction; calculating the cross-correlation energy value E of the imaging point; repeating the third and fourth stepsto obtain the energy values E of all underground imaging points; and setting an energy threshold E0, obtaining the imaging point position of an energy maximum value greater than the energy threshold as the occurrence position of a micro-seismic source. The method realizes the dual-effect suppression of the noise by using the form of multiplication of the waveform cross-correlation coefficients soas to greatly improve an anti-noise capability, avoids the interference of the first arrival polarity on the positioning imaging results, has high calculation efficiency and satisfies the real-time monitoring of the micro-seism.

The invention provides an automatic focusing microscopic imaging system for planet surface material in-situ detection. The automatic focusing microscopic imaging system comprises a lighting unit, a microscopic imaging unit, an image acquisition unit, a focusing transmission unit and an upper computer unit; the lighting unit and the microscopic imaging unit are located in the same optical path; the microscopic imaging unit includes a microscope objective lens and a microscope lens barrel; the focusing transmission unit is a gear external-engagement transmission device; the arrangement direction of the focusing transmission unit is perpendicular to the lighting unit; the focusing transmission unit converts the transmission of gears to the movement of the microscope lens barrel; the image acquisition unit and the microscope lens barrel are in the same optical path; the image acquisition unit is connected with the focusing transmission unit; and the upper computer unit carries out definition judgment on an acquired image and controls the whole system to make the same in a focusing state. With the automatic focusing microscopic imaging system of the invention adopted, definition judgment can be carried out on the image of a sample to be detected; a focusing position can be found out quickly through a fitting a focusing function, and therefore, the speed and precision of focusing can be improved. Unitization design is adopted, so that the automatic focusing microscopic imaging system has the advantages of small size, strong function and so on.

The invention discloses a drone operator positioning system and method based on an aerial radio monitoring platform, and belongs to the technical field of radio direction finding and positioning. The invention includes an airborne direction finding system and a ground control system. The airborne direction finding system measures the incoming wave direction where the maximum energy of the target signal appears, and determines the position; the ground control system remotely controls the airborne direction finding system and the air monitoring platform, and obtains the positioning in real time. result. The airborne direction finding system collects and compresses the target signal, extracts the frequency hopping signal, and matches the azimuth angle, GPS position and time information with the frequency hopping signal in real time; the ground control system controls the air monitoring platform to change the air attitude, so that the airborne measurement Determine to the system the incoming wave direction where the maximum energy of the target signal appears. The present invention is applicable to areas where multi-point ground monitoring equipment is unconditionally erected in complex urban environments, saves manpower and funds, and realizes wide-band, all-round, and high-precision spatial positioning of frequency-hopping signals of remote controllers.

The invention provides a gravity-removing positioning method and a positioning jig for a contactor with an L-shaped mounting frame. When positioning the contactor to be sealed with an L-shaped mounting frame, the bottom surface of the contactor is suspended. In the invention, the bottom surface of the contactor to be sealed with the L-shaped mounting frame is positioned in the air, and the welding surface after the matching of the cover and the base is directly positioned, thereby improving the precision of the laser focal length in the welding process; The influence of welding deformation on the positioning accuracy ensures precise positioning; the positioning accuracy deviation ranges from 0.01 to 0.04 mm, and the positioning accuracy is increased by more than 10 times.

The method comprises: using a repeater coupled-to / integrated-in a location assistant function (LAF) unit as the location assistant device; the network side of the location system can either get TDOA (the time difference of arrival) corresponding to the pilot frequency signal from base station and the TDOA corresponding to the pilot frequency signal of the base station through the repeater, and or get the TDOA corresponding to the pilot frequency signal of LAF unit in the location apparatus; it uses the TDOA corresponding to the pilot frequency of LAF unit and the parameter information of the repeater predetermined at network to abandon the TDOA corresponding to the pilot frequency signals from base station through the repeater, and uses the rest TDOA-namely the TDOA corresponding to the pilot frequency signals from base station and the TDOA corresponding to the pilot frequency signals from LAF unit to make location calculation for the mobile station.

The invention provides a gravity-removing positioning method and a positioning clamp for a contactor with an L-shaped mounting frame. According to the method, the bottom surface of the to-be-edge-sealed contactor with the L-shaped mounting frame is suspended when the to-be-edge-sealed contactor is positioned, and the welding surface formed after a housing is matched with a base is directly positioned, so that the precision of the laser focal length in the welding process is improved. The influence of welding deformation of the mounting frame and the contactor housing on the positioning precision is eliminated, and precise positioning is ensured. The deviation range of the positioning precision is 0.01-0.04 mm, and the positioning precision is improved by more than 10 times.

The invention discloses an environment self-adaption multi-target direct locating method which comprises that a locating center first performs grid point division on a location area and assembles point coordinates into a set; then an ideal dictionary pre-established according to a known base station and the point coordinates; the locating center utilizes two steps of an off-line dictionary study method and on-line dictionary study method to dynamically adjust the ideal dictionary and enables the ideal dictionary to be adapted to dynamic change of signal environments, furthermore, loose signals are reconstructed, the grid point position corresponding to a non-zero value in a sparse vector is the determined position of a moving terminal, and the number of the non-zero value is the number of the targets to be located. According to the environment self-adaption multi-target direct locating method, feature parameters of signal delay, angles, strength and the like do not need to be estimated. Due to the fact that the two-step dictionary study methods can enable the ideal dictionary to be adapted to the environments, high locating precision can be obtained, and simultaneously, the method does not need to let a user know the number of the targets to be located in advance.

The invention discloses a multi-module position module based on the satellite position, which comprises a GPS OEM board with up-and -down structure and a DR circuit plate, wherein the two parts are connected with each other by the interface; the multi-module position module also possesses a position beacon interface, a matching electric map interface, an angle speed measuring unit, a car mileage and reverse signal matching receiving circuit, a MCU CPU, a computer communication interface and a power managing module.

The invention provides a method for synchronously adjusting the balance of a transverse beam of a numerical-control gantry machine tool with the movable beam. The method has the advantages that the pressure of an oil cylinder is linearly adjusted via an electro-hydraulic proportional valve, and a Y-axis sectioned compensation mode is adopted, so that the pressure which is applied by a ram milling head to the oil cylinder is gradually compensated when the ram milling head moves on the transverse beam, the balance of the transverse beam can be synchronously and stably adjusted, pressure impact is prevented, the transverse beam movement positioning precision is unaffected by gravitational unbalance loading caused by the fact that the ram milling head moves along the transverse beam, the transverse beam can run stably, and a phenomenon of out-of-tolerance of inclination can be effectively prevented.