117results about How to "Meet positioning accuracy requirements" patented technology

The invention relates to a multi-beam feedback automatic switch device and driving device, in large-scale flexible antenna, wherein said switch 10 is formed by rotation platform 14, multi-beam feedback source 13, and hollow support bearing 21; the multi-beam feedback source 13 is uniformly distributed on the platform 14, to be supported by hollow support bearing 21, to rotate relative to the fine adjusting platform 9; then switching the feedback source at any frequency, to adjust it at the center of fine adjusting platform, to receive the radio signal at one signal focus and large frequency range; said driving device is formed by a servo motor 23, a flexible coupler 25, a speed reducer 26, a secondary coupler 27, a bearing base 28, and a coiler 29, while they are connected to the ground via bottom frame 30. The invention has wider frequency range, to be used in large flexible antenna and large radio telescope.

The invention discloses a smooth satellite selection method for a signal source of a navigational satellite system. The method comprises the following steps of first satellite selection and subsequent satellite selection, wherein the step of subsequent satellite selection comprises the following substeps of: taking a satellite which is selected last time and is visible this time as a selected satellite this time; selecting NUM satellites and judging a geometric dilution of precision (GDOP) value; modifying newly selected satellites if selection modification is required, and the like; and moreover, in the step of subsequent satellite selection, a judging rule of ascending satellites and descending satellites, a priority sorting rule and a corresponding process flow are newly introduced. Bythe method, the number of variable satellites in two adjacent satellite selection results is reduced, the smoothness of the satellite selection results is kept, a receiver for receiving a navigation signal transmitted by the signal source has high positioning accuracy at a satellite changing moment on the premise of meeting the requirement of positioning accuracy, and a phenomenon that positioning cannot be performed in a short time is avoided basically.

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 an indoor position fingerprint map generation method and system based on an adversarial migration network, and the method comprises the steps: collecting WIFI position fingerprint data in a source domain indoor environment, dividing a data collection region into grids, and collecting the WIFI signal intensity in each grid; when the position fingerprint data in the indoor environment of the target domain are collected, randomly and uniformly selecting a control point grid set with a preset percentage, collecting the WIFI signal intensity of control points, and recordingthe serial number of each grid; training an anti-migration network model, setting, initializing and training a first classifier, a second classifier, a first generator, a second generator and a discriminator, and outputting a loss function value of the discriminator; and continuously optimizing the anti-migration network model until the generated WIFI position fingerprint data meets the positioning precision requirement. The WIFI position fingerprint data of the target domain are generated through migration of the WIFI position fingerprint data of the source domain, and accurate positioning ofthe indoor environment is achieved.

The invention discloses a mine TOA target positioning method for suppressing an NLOS time delay error. The method includes steps: firstly, positioning base stations and a positioning card are set; secondly, the positioning card sends distance detection signals to a positioning base station A and a positioning base station B; thirdly, a synchronous time delay and a timing error are eliminated by employing an SDS-TWR method; fourthly, a roadway random NLOS time delay error is suppressed by employing a Kalman filtering algorithm based on an innovation threshold; fifthly, a distance measured valueafter Kalman filtering based on the innovation threshold is calculated; sixthly, an error brought by a roadway fixed NLOS time delay error is eliminated according to a parameter fitting method; and seventhly, the target position of a to-be-positioned target is further estimated by employing a geometric algorithm. According to the method, the steps are simple, the realization is convenient, the roadway NLOS time delay error can be effectively suppressed, the mine TOA positioning precision can be effectively improved, the practicality is high, the usage effect is good, and the promotion and theapplication are facilitated.

The invention relates to a method for improving base station location success rate. By means of the method, location information of a base station and a list of neighbor base stations are loaded when a mobile locating system loads base station information, for any base station with unknown location, the location information of the base station is estimated through location information of neighbor base stations in the neighbor base station list, the estimated location information is used in location calculation of the mobile locating system, the neighbor base station list for estimating the location information of the base station with unknown location is composed of part of or all of base stations with known location of the neighbor base stations of the base station with the unknown location, and the estimation method can be a centroid method, an outer center method and the like. In addition, direction information and/or height information of the neighbor base stations can be loaded for further improving the estimation accuracy, and requirements for high location accuracy can be met. By means of the method, the location of the base station can be estimated through the location information of the neighbor base stations under the condition that the location information of the base station is not timely loaded or updated, and accordingly the success rate of mobile location can be effectively improved.

The invention provides a multi-angle shooting support and system, and relates to the technical field of shooting. The support comprises a base, a supporting arm and a connecting portion arranged between the base and the supporting arm; the supporting arm and the base can relatively move under the effect of the connecting portion; the supporting arm is used for containing at least one designated object which is fixed to the supporting arm or can move along the supporting arm; each designated object comprises an image collection device or a shot object; each image collection device comprises a camera or a microscope. By means of the multi-angle shooting support, the positions of the image collection devices or the shot objects are transformed to achieve multi-angle shooting, the shooting effect is good, and the cost is low.

The invention discloses a positioning and checking tool for side vertical control over optical prisms and a processing method, and belongs to the technical field of optical prism processing. The positioning tool comprises a base plate, positioning triangular prisms, an end surface positioning block and a side surface positioning block; the two positioning triangular prisms are oppositely arrangedon the base plate and form a V-shaped positioning groove; the end surface positioning block is arranged on the position, on one sides of the positioning triangular prisms, of the base plate and is provided with an end positioning surface; the end positioning surface is perpendicular to the upper surface of the base plate and is perpendicular to the projection plane, on the base plate, of the groove surface of the V-shaped positioning groove; the side positioning block is arranged above the V-shaped positioning groove and is provided with a side positioning surface; and the side positioning surface is perpendicular to the groove surface of the v-shaped positioning groove and the end positioning surface of the end surface positioning block. The processing method comprises the following stepsof firstly, assembling the positioning tool through a checking tool; then carrying out vertical positioning on a square prism by using the positioning tool; and finally, grinding the bevels at the two ends of the square prism. According to the positioning and checking tool and the processing method, the square prism can be conveniently and quickly positioned, and the side vertical precision of the bevels at the two ends can be guaranteed to be within 20 arc seconds.

The invention provides a PPP positioning method applied to satellite navigation landing outfield detection. On the basis of mobile communication data transmission, a precise ephemeris and a precise clock difference of an IGS network station are obtained in real time, and a broadcast ephemeris and observation data are obtained by a receiver antenna; an influence on an ionized layer is eliminated based on double-frequency ionized-layer-free zero-difference observation value combination, and ambiguity and coordinate accumulation is carried out by using extended Kalman filter, and rapid convergence is carried out; and ambiguity information and a covariance matrix that are obtained each time are introduced into a Lambda algorithm to carry out resolution, thereby obtaining a correct ambiguity value and a correct receiver coordinate. According to the invention, a requirement that the cm-level positioning precision can be reached by the signal receiver can be realized. Meanwhile, because the precise track and the precise clock difference that are issued by the IGS network station are obtained in an on-line mode in real time and the high-precision positioning is realized in real time, the practical engineering requirement can be met well.

The invention relates to an orthopaedic robot guide needle positioner, a navigation unit and a positioning system. The orthopaedic robot guide needle positioner comprises a curved guide positioning device. The curved guide positioning device comprises a connecting rod and a support which are mutually connected, a sliding sleeve capable of sliding along the axis of the connecting rod is arranged on the connecting rod, a sleeve fixing structure is arranged on the support, a guide sleeve used for guiding a guide needle is fixedly disposed through the sleeve fixing structure, and the axis of the guide sleeve forms an angle ranging from 15 to 75 degrees with the axis of the connecting rod after the guide sleeve is disposed. By the arrangement of the curved guide positioning device, the guide needle for cooperation can be greatly shortened and is enabled to be far away from a mechanical arm of an orthopaedic robot, interference of the C-shaped arm and the guide needle is removed, and requirements on operation can be well met.

The invention discloses a power transmission line double-end fault positioning method and system based on golden section search. The method comprises the steps of collecting the positive sequence voltage and positive sequence current at a double-end bus of a line at a fault moment when a short-circuit fault happens to a power transmission line, and listing a voltage calculation equation along theline by combining with a line impedance admittance parameter; selecting two test points on the line with the short circuit fault according to the golden section proportion; and respectively comparingthe double-end reckoning voltages of the two test points according to the voltage calculation equation along the line so as to judge a fault interval. The method is based on the voltage distribution characteristics along the line of the lumped parameter model, and the fault point is the minimum value point of the positive sequence voltage distribution curve, so that the search algorithm can be used for infinite approximation until the positioning precision requirement is met. The calculation pressure can be reduced, and meanwhile, the iteration speed is higher. The fault positioning calculation efficiency and reliability are effectively improved.

The invention discloses a two-freedom-degree hybrid stepping motor for bionic eyeballs of a robot. The stepping motor comprises a first freedom degree motor, a second freedom degree motor and output shafts, wherein the first freedom degree motor is of a circular structure with a notch, the second freedom degree motor is of a circular structure with an opening, the notch is matched with the opening, and the planes of the two motors are perpendicularly orthogonal; the first freedom degree motor and the second freedom degree motor both comprise stators and rotors, the stators and the rotors can relatively move in the planes of the motors, and the two-freedom-degree movement of the output shaft of one freedom degree motor can be achieved through respective independent movement of the two freedom degree motors. The two-freedom-degree hybrid stepping motor has the advantages of being simple in structure and manufacture technology, convenient in analysis design, high in mechanical integration level, high in open-loop operation location accuracy, easy in performance experiment test and favorable for shortening the development period of products and improving the performance and the competitiveness of the products.

The invention discloses a method and system for controlling an industrial crane capable of self-adapting a speed planning. Under the limit conditions of a given acceleration and a maximum speed, a bridge crane motion trial is planned on line; a crane multi-pulse speed planning curve is provided according to a motion distance calculation model at the same time; the pulse number of the speed can self-adapt the planning; and smaller swing angle and higher positioning precision in the carrying process of the crane can be achieved without adding an off-line optimization calculation, so that the carrying safety, reliability and working efficiency of the crane in industrial production are greatly improved. The method and system for controlling an industrial crane capable of self-adapting a speedplanning mainly comprise a PLC (1), an angle measuring instrument (2), a laser range finder (3), a frequency converter (4), an alternating-current asynchronous motor (5), the crane (6) moving along the direction of a cross beam, and an upper computer (7).

The invention discloses a tool and processing method used for precise induction brazing of an annular thin-walled part and relates to the field of induction welding. The tool used for precise induction brazing of the annular thin-walled part comprises a combination tool body of asbestos cement and carbon steel and a heating rod. An asbestos cement tool body directly makes contact with the to-be-welded surface of the part without precision requirements, a carbon steel tool body directly makes contact with the non-welded portion of the part, and the positioning precision is ensured. The heating rod is placed in an induction coil, and one end of the heating rod makes contact with the part. After induction heating of the heating rod is conducted, heat is uniformly and gently input into the to-be-welded annular thin-walled part through heat conduction to complete welding. According to the tool and processing method used for precise induction brazing of the annular thin-walled part, reliable and high-frequency induction welding of the annular thin-walled part is achieved, the problem that a traditional nonmetal tool is low in positioning precision is solved, and the problem that the annular thin-walled part is prone to oversintering and partial fusing through high-frequency brazing is solved. The processing method is simple, low in cost, easy to achieve and capable of providing a new method for machining of other similar parts.

The invention relates to a surgical instrument fixing device comprising a base, a horizontal rotating part, a vertical rotating part and a clamping part which are successively connected, wherein the clamping part comprises a V-shaped block and a wedge block; the V-shaped block and the wedge block are both arranged on the vertical rotating part; and the V-shaped groove of the V-shaped block corresponds to the slope of the wedge block. According to the surgical instrument fixing device, a navigation robot body and a pilot sleeve can be effectively isolated so as to satisfy the requirement on the precision positioning of the pilot sleeve.

The invention discloses an airport low-speed unpowered vehicle energy-saving positioning method. The method comprises the steps that when the airport low-speed unpowered vehicle is in an energy-savingmode, a positioning module and a communication module are in a standby state or a dormant state or a closed state, the airport low-speed unpowered vehicle establishes communication connection with anintelligent terminal through a main communication channel, and sends related data of the airport low-speed unpowered vehicle to an airport management server; when the airport low-speed unpowered vehicle is in an emergency mode, a positioning module and a communication module in the positioning terminal are started, the airport low-speed unpowered vehicle establishes communication connection withthe base station through an emergency communication channel, and sends related data of the airport low-speed unpowered vehicle to the airport management server; when it is detected that the airport low-speed unpowered vehicle stops for a period of time, the positioning terminal enters a micro-power-consumption state, and when it is detected that the airport low-speed unpowered vehicle moves, the Bluetooth module or the positioning module and the communication module are started. Through the method, the overall power consumption of the positioning alarm terminal can be reduced.

The invention relates to a design and construction method for a flexible composite, seepage-proofing, fabricated and recyclable row pile supporting structure with a circular cross section. The design and construction method comprises the following steps: (1) constructing row piles with circular cross sections; (2) installing section steel top beams; (3) installing steel panels and performing post-grouting on the steel panels; (4) excavating in layers and sections sequentially in the vertical direction; (5) repeating the steps (3) and (4), and constructing up to the design depth; and (6) performing recycling step by step along with pit backfill after the supporting structure completes the using function. The flexible composite, seepage-proofing, fabricated and recyclable row pile supporting structure with the circular cross section constructed by adopting the design and construction method has the advantages that high safety and reliability are achieved, the construction is fast, the technology is advanced, high recyclability and reusability are achieved and the comprehensive economy and environmental protection indexes are superior, is a new method with advanced technology, high safety and reliability, high recyclability and reusability and superior comprehensive economy and environmental protection indexes for excavation and support of projects such as foundation pits, side slopes, subway stations, municipal pipelines and the like, and further has a considerable development and application prospect.

The invention discloses an embroidery machine with a replaceable and detachable embroidery frame, which comprises an operating table, and the lower side of the operating table is provided with more than four groups of upright columns equidistant and symmetrically distributed, and a PLC controller is provided on one side of the operating table. , the first lead screw is connected to the support frame through a bearing, and two sets of first slide shafts are symmetrically distributed on both sides of the shaft support frame close to the first lead screw, and the first slide shafts are all operated in the X direction. The upper side of the Y-direction operation platform is provided with a fixed sliding table, the middle position of the fixed sliding table is provided with a second screw, and the two sides of the fixed sliding table close to the second screw are provided with symmetrical distribution. Two sets of second sliding shafts, the present invention sets the adjustment handle, support plate, embroidery frame, positioning hole, third sliding shaft and positioning column, and the embroidery frame is slidingly connected with the operation table, so as to achieve the effect of replaceable and dismountable and the positioning accuracy The requirement and tightening and fixing of the embroidered cloth to be processed improves the embroidery efficiency and facilitates the user.

The present invention belongs to the technical field of radiator tests, and especially discloses a micro-channel two-phase flow radiator test device. The device comprises a bottom plate, a glass steelcavity, a transparent glass plate and a cover plate which are connected to each other from bottom to top. An inner cavity formed by the bottom plate and the glass steel cavity is internally providedwith a copper block, a metal block module is internally provided with a heating bar device, a tested microchannel is etched at the top surface of the metal block module, the middle portion of the glass steel cavity is provided with an opening groove, the shape of the opening groove is adaptive to the shape of the microchannel flow channel, the opening groove is provided with a fluid inlet and output corresponding to the microchannel, and the position of the outlet of the fluid is correspondingly provided with a thermocouple device and a pressure sensor device. The test device can more conveniently dismount and replace the microchannel, can achieve microchannel visualization through the transparent glass plate, and is high in practicability and good in test effect.

The invention discloses a classified sliding window method, an SLAM positioning method, a system thereof and electronic equipment. The classified sliding window method comprises the following steps: S110: determining whether the number of all observation frames in a window reaches the maximum window number of the window; s120, when the number of the observation frames reaches the maximum window number, according to the relative pose between the oldest first frame and the oldest second frame in the window, eliminating a preset number of observation frames from the window in batches at intervals; and S130, when the number of the observation frames is smaller than the maximum window number, further determining whether the number of the observation frames is larger than a preset frame number threshold value or not, and if yes, selectively rejecting the observation frames from the window according to the feature point tracking rate of the current observation frame, and if not, selectively rejecting the observation frames from the window according to the feature point tracking rate of the current observation frame; and if not, reserving all observation frames in the window.

The invention relates to a design and construction method for a flexible composite lattice type recyclable double-row pile supporting structure. The method comprises the following steps that (1), a front pile row and a rear pile row are constructed; (2), profile steel crown beams are installed; (3), the earthwork is excavated in layers, panels are installed, and polymer grouting is carried out; (4), waist beams and contra-pull connecting rods are installed; (5), the earthwork is excavated vertically, hierarchically and sectionally in turn, the third step and the fourth step are repeated, the earthwork is excavated to the base elevation, and the construction of the flexible composite lattice type recyclable double-row pile supporting structure system is completed; and (6), after the supporting structure completes the use function, the supporting structure can be recycled step by step with the backfilling of a foundation pit. The constructed supporting structure system has the beneficialeffects of more reasonable structural stress, stronger resistance to lateral earth pressure, avoidance of crossing red lines, safety and reliability, quick construction, advanced technology, recyclability, superior economic and environmental protection indexes and the like and has considerable development and application prospects.

The invention discloses an indoor positioning method based on wearable equipment and the wearable equipment, and the method comprises the steps: judging whether the wearable equipment enters a room from the outside or not according to the change of GPS signal intensity detected by the wearable equipment; if it is judged that the wearable device enters the room from the outdoor, determining the airpressure change trend during movement of the wearable device; judging whether the air pressure is stable or not according to the air pressure change trend; if it is judged that the air pressure is stable, calculating the floor where the wearable device is located according to the air pressure value when the air pressure is stable; and in combination with the floor information, detecting the specific position of the wearable device by using a wireless signal. By implementing the embodiment of the invention, the floor positioning precision during indoor positioning can be improved, and the increasingly high positioning precision requirement of the current application is met.