83 results about "Positional Technique" patented technology

The invention provides an intelligent alarm monitoring method of a neural network. A brand-new intelligent communication network comprehensive monitoring analysis and fault locating system is built by adopting an alarm correlation analysis and locating technology based on an expert system of the neural network. The system guarantees effective monitoring of repeated alarming, alarm oscillation, alarm flash and alarm storm by collecting the alarm data of each piece of equipment of each network element system of each major, and filters out a storm alarm, a flash alarm, an invalid alarm and a secondary alarm correctly; and the system can pick out an important alarm event which is really required to be processed from the collected mass alarms based on a deep correlation rule analysis and neural network technology, and can locate and remove a network fault quickly and correctly. The correction rate of network alarm analysis and fault diagnosis can be improved obviously, customer satisfaction is improved, and operating cost and maintenance cost are reduced greatly, so that the aims of reducing the work load of an operator and a maintainer and improving the efficiency of fault management are fulfilled.

The invention belongs to the technical field of license plate locating, and discloses an R-CNN-based license plate locating method. The R-CNN-based license plate locating method comprises the steps of extracting license plate features through a CNN, and selecting a foreground candidate box by utilizing the extracted license plate features through an RPN; accurately correcting a license plate position through a target classifier and a coordinate regression device; and through training of a large amount of data, obtaining a license plate locating model with relatively high locating rate in a complex environment. An R-CNN license plate detection technology adopted in the method has very strong robustness and can detect license plates with blue, yellow and white backgrounds and different specifications in environments of foggy day, rainy day, light reflection, night, license plate contamination and damage, license plate inclination and the like. A detection model adopts offline training and online testing, so that the detection speed is more efficient than that of a conventional license plate locating algorithm.

The invention relates to a dynamic positioning thrust system for an all direction propeller and a lifting rudder, which belongs to dynamic positioning technical equipment in the field of ship marine technology. The dynamic positioning thrust system comprises the all direction propeller and the lifting rudder. The all direction propeller is arranged below the stern part of a ship, and a C1 axial line thereof vertically intersects with a longitudinal symmetric axis of the ship; and the lifting rudder is arranged below the bow part of the ship, and a C2 axial line thereof vertically intersects with the longitudinal symmetric axis of the ship. In an abyssal environment, when the ship is in the executive process of performing dynamic positioning, the lifting rudder and the all direction propeller cooperate together to finish tasks of overcoming surging, swaying and yawing of the ship; and under a control instruction of a control system, the all direction propeller and the lifting rudder are controlled to implement thrust executive function of the dynamic positioning according to the established proposal. The technology of the invention can be applied to large size, medium size and small size ships or semi-submersible ocean platform, has a positive significance on improving the dynamic positioning technology, and can produce obvious economic benefit.

The invention discloses a multi-system fusing and positioning method and device, and belongs to the technical field of positioning. The method comprises the steps that the pseudo range between a satellite selected from each positioning system and a receiver serves as a reference pseudo range, the deduction is carried out on the reference pseudo range and the pseudo ranges between the other satellites and the receiver to carry out position resolving, and then the position of the receiver is obtained when each positioning system carries out positioning this time; the weighted value of each positioning system in the positioning process this time is obtained according to the evaluation parameters of all satellites in each positioning system in the positioning process this time; the position of the receiver after the multi-positioning system fusing and positioning is determined according to the position and the weighted value of the receiver when each positioning system carries out positioning this time. According to the multi-system fusing and positioning method and device, low filtering efficiency caused by incorrect prior information in a kalman filter is avoided; the positioning errors of all positioning systems are restrained through the evaluation on all the positioning systems and the evaluated weighted values, and positioning precision is improved.

The present invention relates to ship position keeping technology, aims at solving the special problem of keeping ship position and discloses one kind of dynamic ship position keeping method. The method includes selecting power control system mode, setting the executing mechanism control in 'dynamic position keeping control' mode, acquiring the ship and environment information with the measurement equipment, sending out command with the dynamic ship position keeping control system and keeping the ship position dynamically with the executing mechanisms. The said method can realize fixed point control of ship, automatic heading, automatic tracking navigation, etc. and may be applied widely in military and civil ships with special position keeping requirement.

The invention discloses a distributed method for collecting zero-sequence current concerning load variation in the technical field of fault line selection and positioning of a power system. The method comprises the following steps: assembling current transformers in phases, transmitting detected current to an error setter and a synthesizer; setting detected current of each phase by the error setter to acquire the maximum error delta I (L max) and determine a radius r of a voltage error circle; determining collected zero-sequence current 3I'0 by the synthesizer by taking the phase of head end zero sequence voltage *0 as a reference phase; comparing sizes of the 3I'0 with the delta I (L max) by a comparer, outputting phase information phi(3*'0) of the current to a direction indicator when the 3I'0 is more than the delta I (L max), and ensuring that the direction indicator maintains the indication result; transmitting a locking signal to the direction indicator by a locking device when the 3I'0 is less than the delta I (L max), not outputting the phase information, and leading the direction indicator not to indicate; and completing flow direction determination of the zero sequence current of all collection points, and performing fault line selection and fault positioning according to the indication result. The method ensures the accuracy of flow direction determination of the current through locking the zero sequence current when unbalance current is small.

The invention discloses a rock sample hydraulic fracture morphology acoustic emission diagnosis experimental method and device, wherein the rock sample hydraulic fracture morphology acoustic emission diagnosis experimental method comprises the steps: a sensor array of a three-dimensional rock sample space is optimized to design, a rock sample emission speed filed is actively positioned and tested, and rock samples are done with a hydraulic fracturing physical simulation experiment, then are analyzed through sound wave arrival time recognition sound wave data, screen effective acoustic emission signals, and position acoustic emission event points in real time. Effective acoustic emission signals are analyzed through a focal mechanism and clusters, thereby obtaining extensional fracture and shear fracture spatial distribution regulations. The influence of geological stress conditions, natural fracture development degrees, net pressure construction and fluid viscosity to a hydraulic fracture extended mechanism is analyzed through many time experimental results of the hydraulic fracturing physical simulation experiment. The rock sample hydraulic fracture morphology acoustic emission diagnosis experimental method and device solves the difficult problems that effective signals in large size unconventional samples are difficult to collect and are low in positionaI accuracy.

The invention discloses a labor-saving linkage positioning and locking structure, and belongs to the technical field of positioning of machining equipment. The labor-saving linkage positioning and locking structure comprises a connecting rod, clamping jaws, screw rods, a frame, cross universal joints, a guide rail, a locking mechanism, a spring support base, a positioning groove and a steel plate spring, wherein the guide rail is horizontally mounted on the frame; the positioning groove is formed in the guide rail; the spring support base is arranged on the side surface of the frame, and is provided with the steel plate spring; the steel plate spring is parallel to the guide rail; the connecting rod is perpendicular to the guide rail, and is horizontally arranged below the guide rail; the screw rods are respectively connected to the two ends of the connecting rod; the cross universal joints are respectively arranged between the connecting rod and the screw rods; the clamping jaws are respectively matched and mounted on the screw rods at the two ends of the connecting rod; and the tail end of one screw rod is fixedly connected to the locking mechanism. Through the positioning of rollers and the linkage of the clamping jaws, mechanical loads with the rollers achieve a quick, stable and reliable positioning and locking effect on the guide rail for a long time; and the starting force in renewed starting is comparatively low and no scratches of the guide rail may be caused.

The invention provides an oblique-pulling rhombic amplification piezoelectric stick-slip linear motor and an excitation method thereof, and aims to solve the problem of an existing piezoelectric stick-slip linear motor that the output mechanism performance is limited by difficult comprehensive regulation and control of frictional forces. The oblique-pulling rhombic amplification piezoelectric stick-slip linear motor is composed of a pre-compression device, an oblique-pulling stator and a mover. An oblique-pulling rhombic movement conversion mechanism of the stator has a micro-displacement amplification function, and the distribution of the axial rigidity is uneven and a lateral displacement is generated, so that the friction driving force is increased, and the friction resistance is reduced; in addition, friction regulation and control waves are superposed to sawtooth driving waves in a coupled manner in a rapid deformation driving phase of the oblique-pulling stator, so that the friction resistance between the stator and the mover in the rapid deformation driving phase is reduced, the comprehensive regulation and control of the frictional forces is realized, and the mechanical output characteristic of the piezoelectric stick-slip linear motor is improved. According to the invention, the oblique-pulling rhombic amplification piezoelectric stick-slip linear motor has the advantages that the structure is compact, the assembling is convenient, the positioning precision is high, and the stroke is not limited, so that the oblique-pulling rhombic amplification piezoelectric stick-slip linear motor can be widely applied to the technical field of micro-nano precise driving and positioning such as precise optical instruments.

The invention relates to a wedge type diamond-shaped amplification mechanism piezoelectric stick-slip linear motor and excitation method thereof, aims to solve the problem that the output mechanical property of the current piezoelectric stick-slip linear motor is limited caused by difficulty in comprehensive control on a friction force. The piezoelectric stick-slip linear motor comprises a pre-stress adjustment device, a wedge type stator and a rotor, wherein a wedge-type diamond-shaped movement conversion mechanism of the stator has a function of micro-movement amplification, the axial rigidity of the wedge-type diamond-shaped movement conversion mechanism is not uniform in distribution, lateral displacement is generated, the friction driving force also can be increased, and the friction resistance is reduced; and meanwhile, a friction control wave is coupled and superposed to a sawtooth driving wave in a rapid deformation driving stage of the wedge-shaped stator, the friction resistance between the stator and the rotor in the rapid deformation stage is reduced, the comprehensive control on the friction force is achieved, and the mechanical output property of the piezoelectric stick-slip linear motor is improved. The piezoelectric stick-slip linear motor has the advantages of simple and compact structure, high positioning precision, large stroke and the like, is easy to assemble and convenient to control, and can be widely applied to the technical field of micro-nano precision driving and positioning such as semiconductor processing.

The invention belongs to the technical field of satellite precise navigation and positioning, and specifically relates to a whole-cycle ambiguity correctness checking method based on integrity monitoring capable of improving the reliability of satellite navigation and positioning. The method comprises the following steps: counting detection quantity and a probability density distribution model of the detection quantity under fault-free hypothesis and fault hypothesis in an observed quantity domain by constructing an ambiguity floating solution and an ambiguity fixed solution, and competing correctness checking for the ambiguity floating solution in the observed quantity domain; carrying out decorrelation treatment in an ambiguity space, using the floating solution as the center of the ambiguity fixed solution, searching and obtaining in the determined range of a variance-covariance matrix after decorrelation, and completing difference checking for the ambiguity floating solution and the ambiguity fixed solution. According to the method, the resolving success rate is maximized by adjusting the combined scheme of the observed quantity and adjusting an ambiguity organization region.

The invention discloses a high-power precision piezoelectric ultrasonic driving platform and a driving method thereof so as to solve the technical problems of unsatisfactory overall output performance and the like caused by independently adopting a beam-structure elastomer ultrasonic motor or a plate-structure elastomer ultrasonic motor to act as a positioning platform of a driver. The high-power precision piezoelectric ultrasonic driving platform comprises a fixed outer frame, a first elastomer, a second elastomer, a rotating platform, a rolling body, a thrust ball bearing, a butterfly spring, a fastening connector and an internal hexagonal bolt, wherein the first elastomer is of a beam structure, and the second elastomer is of a plate structure. According to the invention, ultrasonic frequency internal excitation electric signals are applied to a piezoelectric element, the first elastomer and the second elastomer are excited to generate a micro-amplitude high-frequency vibration mode, and driving friction is generated at a contact surface of the second elastomer and the rotating platform by using superposition coupling of the vibration modes, thereby realizing rotational displacement motion output. The high-power precision piezoelectric ultrasonic driving platform has the technical advantages of high output power, good running stability, wide application range and the like, and has wide application prospects in the technical fields of precision driving and micro positioning.

The invention relates to the technical field of GPS, in particular to an efficient GPS digital tracking method. The efficient GPS digital tracking method is characterized in that in the tracking process, the center frequency of a carrier wave is separated from the center frequency of a C/A code, a tracking ring only tracks and adjusts Doppler frequency deviation, corresponding deviation phase step length is calculated through the Doppler frequency deviation, and then the deviation phase step length is compensated with the center phase step length corresponding to the center frequency. According to the efficient GPS digital tracking method, the Doppler frequency is smaller than the center frequency and the largest Doppler frequency is only 1/818 of the center frequency of the carrier wave, and the width of 10 bits can be saved; the largest Doppler frequency of the C/A code is only 1/255750 of the central frequency of the C/A code, and width of 18 bits is saved, computation complexity is reduced when respective phase step lengths are computed, and the synchronous speed and efficiency of the GPS tracking ring are improved.

The invention discloses a micro-macro two-stage driver and a control method thereof, and belongs to the technical field of precision positioning. The micro-macro two-stage driver comprises an outer casing, a second coil skeleton, an output rod, an end cover, a pre-tightening screw and a wiring terminal, wherein a permanent magnet cylinder is arranged in the outer casing to provide a radial magnetic field; a first coil skeleton is arranged in the permanent magnet cylinder, and is used for winding a first coil; a second coil skeleton is arranged in the first coil skeleton, and is used for winding a second coil; a giant magnetostictive telescopic rod is arranged in the second coil skeleton; the end cover is fixedly connected with the first coil skeleton through a bolt; an output hole is formed in the center of the end cover; the output rod penetrates through the output hole; the pre-tightening screw penetrates through the circular hole and is connected with a threaded hole by threads; both ends of the first coil are respectively connected with a first conducting wire and a second conducting wire. The micro-macro two-stage driver has the advantages that by adjusting the size of currentwhich is led into the first coil to control the macro-moving of the driver, and adjusting the size of current which is led into the second coil to control the micro-moving of the driver, the large-travel and high-accuracy drive effect can be realized.

The invention relates to the technical field of vehicle positioning, and provides a method and device for obtaining vehicle positioning information. According to the method, firstly, navigation states representing a vehicle at a plurality of moments and a factor graph representing a constraint relation among the navigation states at the plurality of moments are constructed, and then an initial value of the navigation states of the plurality of moments in the factor graph is determined, and finally based on the initial value of the navigation states at the plurality of moments, and the constraint relation among the navigation states at the plurality of moments, the factor graph is optimized and solved, and further, the optimization value of the navigation state of a target moment in the plurality of moments is determined as the positioning information of the vehicle at the target time. According to the method, since the constraint relation among the navigation states is fully taken into account, the optimization value of the obtained navigation state can accurately estimate the real navigation state of the vehicle at the target time, and therefore, the optimization value is used asthe positioning information of the vehicle at the target time, the accurate positioning of the vehicle can be achieved and the effect of automatic driving can be improved.

The invention relates to a bidirectional interlocking type piezoelectric stick-slip driving device and an excitation method thereof. The invention aims to solve the technical problem of the poor bidirectional output performance of an existing piezoelectric stick-slip drive device. The device of the invention is composed of a sliding base, a sliding assembly and a driving assembly; the driving assembly is installed on the sliding base; and the sliding assembly is installed on the sliding base and contacts with the driving assembly. According to the bidirectional interlocking type piezoelectricstick-slip driving device and the excitation method thereof of the invention, a parallel double-clamping hinge is adopted; the comprehensive regulation of the friction force of the piezoelectric stick-slip driving device in a driving process is realized on the basis of a rhombus contraction and stretch characteristic; two rhombus hinges in central symmetry form a parallel interlocking type hinge structure; with the excitation of double-excitation electric signal groups realized, interference influence on the movement of the sliding assembly during the driving of the driving assembly is reduced, so that displacement backward movement is reduced, and therefore, the mechanical output performance of the bidirectional driving device is improved. The device has the advantages of large output thrust, high precision, small bidirectional interference and the like, and can be widely applied to the technical field of micro-nano precision driving and positioning.

The invention relates to a frame locating technique in optical synchronous digital transmission system; during STM-N frame data process of the optical synchronous digital transmission system, making frame locating operation at parallel system clock, and its characters: it can reduce working frequency of frame locator and provide system stability; and can select proper parallel digit according to actual requirement to apply to frame locating operation in the different-line speed frame data process.

The invention provides a radio-frequency signal distance measurement method and system which are capable of estimating a distance between an emission node and a receiving node on the premise of independence of radio-frequency receiving signal intensity measurement hardware. The method comprises the steps of: obtaining a relation table between occurance probabilities of different distance measurement codons and a distance between nodes, wherein the distance between the nodes is the distance between the emission node and the receiving node; emitting a distance measurement grouping row through the emission node, wherein the distance measurement grouping row comprises a plurality of groups of different radio-frequency emission power levels, and the grouping content includes radio-frequency emission power information of the group; receiving the groups emitted by the emission node through the receiving node, constructing the distance measurement codon according to the receiving result of the receiving node; estimating the distance between the emission node and the receiving node according to the constructed distance measurement codon and the obtained relation table between the occurance probabilities of different distance measurement codons and the distance between the nodes. The radio-frequency signal distance measurement method and system are applicable to the technical field of positioning.

The invention belongs to the technical field of wireless distance measurement and positioning and particularly relates to a vehicle wireless distance measurement method based on standard deviation iteration. The vehicle wireless distance measurement method mainly comprises four steps: A, performing correlation calculation and normalization processing on IEEE802.11p protocol receipt signals; B, performing grouping summation on the statistical result to obtain a summation sequence S; C, judging the normalized standard deviation stdS of the group comprising 16 samples in at least 160 samples in front of the maximum value of the current summation sequence S, if stdS [1] greater than 0.9 and stdS [10] smaller than 0.1 are not met, assigning the maximum value of the summation sequence S as 0 and continuing loop iteration, otherwise, returning to the subscript PeakIndex of the maximum value in the summation sequence S; D, calculating to obtain the distance according to the PeakIndex. According to the invention, correlation, summation and standard deviation iteration are used in wireless positioning of the IEEE802.11p protocol for the first time and can improve the vehicle distance measurement accuracy under the multipath, non-orthoptic and high Doppler shift environment.

Systems and methods for determining a position of an object are provided by the present invention. Light is captured by at least one collector. Each collector has a first opening through which light enters that is larger than a second opening through which light exits. The exiting light is used by at least one light detector to generate signals. The position of the object is determined based upon the generated signals.

The invention relates to the technical field of positioning of three-pin shaft forks, in particular to a positioning mechanism used for machining of a three-pin shaft fork of an automobile transmission system. The positioning mechanism comprises a base, a power mechanism, a fixed platform, a movable platform and a proximity switch, wherein the power mechanism is arranged on the base; the fixed platform is fixed to the output end of the power mechanism and used for driving the fixed platform to rotate; the movable platform is connected in the direction of the axis of the fixed platform in a sliding mode relative to the fixed platform, the movable platform is radially fixed relative to the fixed platform, a spring is arranged between the movable platform and the fixed platform, and one or more positioning blocks matched with shaft holes in the three-pin shaft fork are arranged on the movable platform; and the proximity switch is used for detecting whether the movable platform moves or not and is in signal connection with a controller, and the controller is in signal connection with the power mechanism. According to the positioning mechanism provided by the invention, adaptive adjustment of the positioning blocks on the movable platform relative to the three-pin shaft fork can be achieved, and the three-pin shaft fork is automatically positioned during automatic production and machining.

The invention discloses an automatic positioning and welding method adopting image recognition. The automatic positioning and welding method adopting image recognition comprises the following steps that 1, initialization is carried out on a system; 2, welding equipment is controlled to move along a main beam, whether the welding equipment reaches the end of the main beam or not is judged, the welding equipment moves continuously and imaging equipment is used for recognizing rib plates if the welding equipment does not reach the end of the main beam, the next step is executed if the rib platesare recognized, the welding equipment continues to move if the rib plates are not recognized, and the welding equipment stops working when reaching the end of the main beam; 3, the positions of the weld joints of the rib plates are recognized through the imaging equipment, and the welding equipment is controlled to move to the positions of the weld joints; and 4, welding is carried out on the weldjoints by controlling a welding gun of the welding equipment, and the step 2 is carried out again when welding is finished. Compared with the prior art, the automatic positioning and welding method adopting image recognition has the advantages that the technology that the weld joints of the rib plates are automatically positioned is achieved through image recognition; and the inner joints of a beam box of a crane can be effectively and automatically welded.