67results about How to "Avoid positioning failure" patented technology

The embodiment of the invention discloses methods and devices for measuring OTDOA (observed time difference of arrival) and sending positioning assistance data and a system, relating to the technical field of wireless communications. The methods, devices and system are used for solving the problem of failure of OTDOA positioning because UE can not carry out OTDOA measurement. The methods comprise the following steps that: the UE determines the cells which can detect the signals self and sends the information of the cells to a positioning server according to the determination result; the positioning server selects the OTDOA measurement cells for the UE according to the information of the cells and sends the OTDOA assistance data including the information of the OTDOA measurement cells to the UE; and the UE carries out OTDOA measurement according to the OTDOA assistance data. By adopting the methods, devices and system, the possibility of failure of OTDOA positioning can be reduced.

The invention is a biometric system based on iris texture analysis, which overcomes the defects in the prior art that lack the support of iris image quality analysis mechanism and cannot complete the evaluation of iris texture image quality. The invention acquires iris texture images, automatically locates iris, evaluates and analyzes the quality of iris texture images, automatically tracks and detects living iris, standardizes polar coordinate transformation of iris analysis area, demodulates and expresses iris texture features, and generates feature code IrisID by quantization coding. Encoding IrisID similarity measurement, similarity measurement judgment and other steps are realized. The invention realizes the basic characteristic requirements of an ideal system: automaticity, non-invasiveness, friendly man-machine operation interface and high-quality imaging image; no correlation between geometric affine transformation and nonlinear affine deformation; no dependence on external imaging conditions ; Random probability distribution coding; High-precision false acceptance rate and false rejection rate performance.

The invention provides an indoor positioning method adopting visible light and inert composition. A mobile carrier can detect a visible light signal in a process of moving in a room. The indoor positioning method comprises the following steps: judging whether the mobile carrier is positioned in a visible light strong coverage region according to a light intensity threshold value; if a light intensity value is less than the light intensity threshold value, directly taking a position estimation value acquired by an inert device as carrier positioning information; if the light intensity value is greater than or equal o the light intensity threshold value, calculating the position estimation value according to the visible light signal, subtracting the position estimation value acquired by the inert device from the position estimation value calculated according to the visible light signal, and performing Kalman filtering on an obtained difference value to obtain a drift error of the inert device, wherein the drift error is used for correcting the inert device, and the corrected position estimation value of the inert device is used as the carrier positioning information. According to the indoor positioning method, the influence caused by a cover blind area and a shadow in a visible light positioning process can be effectively avoided, and the shortcoming that the error of the inert device is accumulated along the time is overcome; continuous automatic high-precision indoor positioning is realized.

The invention discloses high-precision vegetable and fruit quick intelligent selecting equipment. The high-precision vegetable and fruit quick intelligent selecting equipment comprises a feeding conveying device, a horizontal conveying device and a pneumatic mechanism, wherein a horizontal conveyer belt comprising rollers is arranged on the horizontal conveying device; one or more groups of screening and discharging mechanisms which are opposite to the pneumatic mechanism in an up and down manner are arranged above the horizontal conveying belt; each screening and discharging mechanism comprises a discharging platform which is fixedly arranged above the horizontal conveying device; anti-falling baffles are respectively arranged on the front side and the rear side of each discharging platform; a rotational flow cover is arranged on each discharging platform; the side edge of each rotational flow cover is arc-shaped; a substandard product blowing-out opening is formed by two side edges of each rotational flow cover and two side edges of the corresponding discharging platform; each substandard product blowing-out opening is in up-and-down correspondence with air jet holes of the pneumatic mechanism. According to the high-precision vegetable and fruit quick intelligent selecting equipment disclosed by the invention, the screening and discharging mechanisms adopting special structures, a feeding and conveying device and rollers in the horizontal conveying device are arranged, the effects of positioning and precise photographing of vegetables and fruits are increased in an omnidirectional manner, and the screening efficiency is also greatly improved.

The invention discloses a coal mine fully mechanized mining face advancing degree detection system and method. The coal mine fully mechanized mining face advancing degree detection system is composedof positioning anchor points, positioning tags, positioning controllers, a master control system and the like. The positioning anchor points are fixedly installed on the rock walls of an air intake roadway and an air return roadway at equal distances, the positioning tags and the positioning controllers are deployed on a hydraulic support, a coal mining machine and the like, the distances betweenevery two positioning nodes are measured, distance measurement data are transmitted to a main control computer by the positioning controllers through communication network, the positions of the equipment in the mining face advancing process are worked out by the main control computer according to the data, and therefore automatic detection can be achieved in the mining face advancing process.

The embodiment of the invention discloses OTDOA (Observed Time Difference of Arrival) measurement, and a positioning assist data transmission method, a positioning assist data transmission system and a positioning assist data transmission apparatus, pertaining to the technical field of wireless communication, so as to solve the problem of OTDOA positioning failure caused by UE inability to perform the OTDOA measurement. According to the invention, a terminal determines residence communities which can detect signals by themselves, and on the basis of the determination result, information of the residence communities which can detect the signal by themselves is transmitted to a positioning server. The positioning server, on the basis of the residence community information, selects an OTDOA measurement residence community for the terminal, and transmits the OTDOA assist data which comprises the OTDOA measurement residence community information to the terminal. The terminal carries out the OTDOA measurement on the basis of the OTDOA assist data. According to the invention, the possibility of the OTDOA positioning failure can be reduced.

The invention discloses a wireless sensor node ranging method for tunnels. The method measures the time of message transmission between two nodes to acquire the measured distance between the nodes and reasonably screen measured distances, thus effectively overcoming the affection of the multipath effect, attenuation, distortion and the like of radio signals on the ranging precision in a tunnel environment, and the method has a good inhibition effect on transient faults occurring in the process of ranging. The invention also provides a sensor node positioning method, the measured distance between a mobile node and a reference node is first acquired according to the ranging method, the iteration method is then adopted to calculate the coordinates of the mobile node, the method is added with the process of iterative refinement on the basis of maximum likelihood estimate, and thereby the precision of mobile node positioning calculation is greatly increased.

The invention discloses a method and a die for molding a backseat side cover plate of an automobile. The method for molding the backseat side cover plate of the automobile comprises the following steps of: blanking and making a blank; performing drawing forming, namely performing primary drawing and secondary forming, wherein the primary drawing is used for the initial molding of a convex hull and the molding of a plate part of the backseat side cover plate, and the secondary drawing is used for the final molding of the convex hull; trimming and punching; and flanging, and performing hole flanging. The die for molding the backseat side cover plate of the automobile is used for primary drawing in the method for molding the backseat side cover plate of the automobile, and comprises an upper die holder, a lower die holder, an upper die, a lower die, a lower die support, a positioning block and an elastic device. According to the method and the die for molding the backseat side cover plate of the automobile, the die and a molded curved surface of the plate part of the blank of the backseat side cover plate are matched to resist the relatively large internal stress generated by a convex hull structure in the drawing process, so that the blank of the backseat side cover plate is reliably positioned, the positioning failure which is caused by the relative motion of the blank of the backseat side cover plate and the die can be effectively prevented, and the molding quality is ensured; and the product has high structural strength, and can meet the requirements of fatigue strength of vehicle bodies.

The invention discloses a vibration feeding device for fruit and vegetable intelligent selection equipment. The vibration feeding device solves the technical problems that in the case of a feeding transmission device in existing fruit and vegetable screening equipment, the transmission effect is poor and adjustment can not be achieved, so that the screening precision is seriously influenced. The vibration feeding device comprises a driving unit connected with a feeding plate, a rolling brush driven by a rotating motor is arranged above the feeding plate, the feeding plate comprises a pluralityof feeding grooves which are longitudinally arranged in parallel, the extending direction of the feeding grooves is the same as the feeding direction, the driving unit comprises an armature fixedly arranged at the lower end of the feeding plate, the armature is connected with a supporting base through a plate spring, a magnetic attraction box which is in magnetic attraction fit with the armatureperiodically is arranged behind the armature at an interval, the two ends of the rolling brush are fixed on a supporting frame through linear motors which are vertically arranged, and the rotating motor, the linear motors and an electromagnetic coil are connected with an industrial computer through a driving circuit. According to the vibration feeding device, the conveying process is stable, the brush is adjustable, arranging and positioning effects are reliable, and the function of directionally and stably conveying fruits and vegetables in line according to the categories is achieved.

The embodiment of the invention provides a vision-based positioning method, device and equipment. The method comprises the following steps: acquiring a plurality of images of at least two visual angles; extracting features of the plurality of images; according to the extracted features, determining matching point pairs of the plurality of images and a map database; according to the relative posesof the at least two visual angles and the matching point pairs, determining the scale information, the rotation information and the translation information between a camera coordinate system and a mapcoordinate system; and determining the position of a to-be-positioned image according to the scale information, the rotation information and the translation information. According to the method disclosed by the embodiment of the invention, the plurality of images of the at least two visual angles are obtained, a wider field of view is obtained, more matching point pairs can be obtained, and the positioning accuracy and the positioning success rate are improved.

The invention discloses a positioning method and device for a household electrical appliance, and a server. The method comprises the steps: obtaining the current operation state of the household electrical appliance; determining a target positioning mode corresponding to the current operation state; and carrying out the positioning of the household electrical appliance according to the target positioning mode. Through the arrangement of a plurality of different positioning modes, the household electrical appliance in different operation states is positioned through different positioning modes. Even if the household electrical appliance is not positioned through one positioning mode, the household electrical appliance can be positioned again through one positioning mode corresponding to another operation state when the household electrical appliance operates at the operation state, thereby achieving the positioning of the household electrical appliance through the combination of the plurality of positioning modes, avoiding positioning failure caused by a single positioning mode, achieving the accurate positioning of the household electrical appliance, improving the positioning success rate, and solving a technical problem that a single positioning mode in the prior art causes the lower positioning success rate of the household electrical appliance.

The invention discloses a double-tip positioning mechanism with a bearing. The double-tip positioning mechanism includes a gear shaft front frame center positioning mechanism and a gear shaft tailstock center positioning mechanism, the front end and the rear end of the gear shaft are positioned by the two positioning mechanisms to realize the axial positioning of the gear shaft. The gear shaft front frame center positioning mechanism comprises a mandrel, a spring is arranged at the tail end in the mandrel hole, a dustproof guide sleeve is arranged at the front end in the mandrel hole, the other end of the spring is connected with a center, and the center penetrates through the dustproof guide sleeve and extends out of the mandrel hole; a bearing inner ring is arranged on the periphery of the mandrel, the bearing inner ring is matched with the outer circle of the bearing through a bearing ball, a shell is arranged on the periphery of the outer circle of the bearing, and the mechanism issimple in structure and accurate in positioning. The invention discloses a positioning method of the double-tip positioning mechanism with the bearing, thereby being simple in positioning operation and accurate in positioning.

The invention discloses an artificial bee colony-based Monte Carlo localization method. In the Monte Carlo localization method, a behavior of simulating honey collection of bees is added for realizingthe localization. The method comprises the steps of firstly, initializing an initial particle sample set S1 of a certain quantity of particles in a given space; secondly, building a robot motion model, and forming a primary new particle sample set S2 according to the motion model based on all the particles in the initial particle sample set S1; thirdly, building an observation model, and taking the observation model as a fitness function of an artificial bee colony algorithm; fourthly, taking the primary new particle sample set S2 as an initial honey source position of an artificial bee colony, and simulating the honey collection behavior of the bees for performing global optimization; and finally, updating particle weights, and calculating out a robot pose. The exploration capability ofthe particles is effectively improved to avoid localization failure due to the fact that the particles fall into local optimum in complex environments or environments with similar structures; and while the particle diversity is ensured, the real position of a robot is quickly converged.

The invention discloses a distributed volume Kalman filtering cooperative positioning method based on confidence transfer. The method comprises the steps that the initial state of mobile agent nodes in a wireless sensor network meets Gaussian distribution, and the mobile agent nodes are cooperatively positioned and modeled into an edge posteriori distribution estimation problem of multivariable nodes in a time-varying factor graph; a Gaussian parameterization confidence transfer and reconstruction strategy and a distributed volume Kalman filtering method are proposed, the posteriori distribution of each variable node is calculated on the factor graph, and further a positioning result of each mobile agent node is obtained. According to the cooperative positioning method disclosed by the invention, only the Gaussian parameterization confidence coefficient needs to be transmitted between the adjacent agent nodes, the expansibility and robustness are good, the communication overhead and the calculation complexity are relatively low, and the overall network positioning precision and efficiency are improved.

The invention discloses an auxiliary positioning system based on moving state intelligent analysis, and an implementation method for the auxiliary positioning system. The system comprises a GPS satellite module, a base station module, a Wi-Fi module, a mobile terminal, and a hybrid positioning cloud platform. The mobile terminal obtains the GPS positioning data according to a GPS signal provided by a GPS satellite module, calculates the current position information according different base station signals through a triangle method, and obtains the current position information according to a Wi-Fi hotspot provided by the Wi-Fi module. The hybrid positioning cloud platform interacts with the mobile terminal to complete the hybrid positioning according to the current position information provided by the mobile terminal. The system solves a problem of positioning in different scenes, does not need to depend on a large amount of additional investment, can achieve the effective positioning indoors and outdoors through very commonly used mobile terminals, obtains as precise a positioning result as possible, and avoids the positioning failures which definitely happen in the technology of independent positioning.

The purpose of the invention is to provide a variable camshaft with simple structure and easiness in processing and an engine adopting the camshaft. The engine can utilize the camshaft to adjust valvelift, thereby achieving the purpose of improving the fuel economy and power performance. The variable camshaft is composed of hollow shafts on the two sides and a main shaft in the middle part, wherein the two sides of the main shaft extend into the hollow shafts on the corresponding sides, and are movably connected with the hollow shafts on the corresponding sides by spline fit; at least two cams corresponding to different lift curves are arranged on the shaft body of the main shaft; the main shaft and at least one hollow shaft on one side are provided with self-locking mechanisms which arematched with each other so as to fix the main shaft to a preset position; and a blanking cap is arranged at one end, far away from the main shaft, of each hollow shaft, and an oil pore passage used for being connected with a hydraulic oil pipe is formed in the blanking cap. The variable camshaft has the advantages of simple structure, convenience in control and high reliability, can ensure the good matching of different cams and a tappet, and is very suitable for adjustment of the valve lift of the engine.

The invention relates to the technical field of air adjustment, in particular to an air deflector positioning structure. The air deflector positioning structure comprises an air outlet frame, a set of parallel air deflectors arranged in the air outlet frame and a positioning mechanism; each air deflector is pivoted to the air outlet frame, and all the air deflectors are connected through a connecting rod; and the positioning mechanism limits movement of the connecting rod relative to the air outlet frame, and therefore the rotating angle of the air deflectors relative to the air outlet frame is further located. According to the air deflector positioning structure, when a user needs to change the air direction, one of the air deflector is pulled with the hand, and all the air deflectors synchronously rotate under driving of the connecting rod; in the rotating process, when the air deflectors rotate to a certain angle, due to the fact that movement of the connecting rod relative to the air outlet frame is limited by the positioning mechanism, rotation of the air deflectors relative to the air outlet frame is limited, and the different-angle air guide function of the air deflectors is achieved. The invention further provides a cooling fan.

The invention discloses a self-adaptive welding tool which comprises a tool body, a clamping mechanism A, a clamping mechanism B and a self-adaptive mechanism. The clamping mechanism A is arranged on the tool body. The self-adaptive mechanism comprises a sliding part and an elastic pressing part; the clamping mechanism B is arranged on the sliding part; the sliding part is connected with the tool body in a sliding mode; the elastic pressing part is arranged between the sliding part and the tool body; and the elastic pressing part has elastic pre-pressing force for enabling the sliding part to slide in a preset direction on the sliding part, so that an accessory clamped by the clamping mechanism B and an accessory clamped by the clamping mechanism A are located at a position suitable for welding. According to the self-adaptive welding tool, the position of the accessory can be automatically adjusted according to welding penetration, so that the influence of the welding penetration is eliminated.

The invention discloses an anti-interference transformer partial discharge positioning method and device based on sound pressure. According to the device, whether a sound source comes from the insideof a transformer is judged by utilizing sound pressure information of internal and external sensors, and when the sound source is judged to come from the inside of the transformer, the partial discharge position is judged through the sound pressure value of the built-in sensor group. According to the method, based on a sound pressure-distance model, the occurrence position of partial discharge isroughly judged according to received information of a sound pressure sensor, a sound pressure-distance equation set is established through the position of the sensor and sound pressure information, and the partial discharge position is solved through a simulated annealing algorithm to obtain the specific position of partial discharge. The sound pressure-distance model provided by the invention ishigh in positioning precision, can resist the interference of external sound waves, and avoids the impact on positioning from the refraction and reflection of the sound waves in the transformer.

The invention discloses a power field operator positioning method and system. The method comprises the steps: firstly, determining the coordinate positions of a plurality of cameras through a calibration object, shooting the images of an electric power field including an operator through the plurality of cameras with the determined coordinate positions, then recognizing the operator in the images, and calculating the relative position of the operator relative to each camera so as to determine the coordinate position of the operator. An operator does not need to be positioned in real time depending on a GPS, a Beidou positioning system and a UWB positioning system. The technical problem that the accuracy and convenience requirements cannot be met at the same time in the existing mode that a GPS (Global Positioning System), a Beidou positioning system and a UWB (Ultra Wideband) positioning system are adopted to position power field operators is solved.

The invention relates to a quick-detachment positioning structure for a rail component. The quick-detachment positioning structure for the rail component comprises an open hole formed in the rail component and a positioning component corresponding to the open hole, wherein the rail component comprises a first stopping part adjacent to the open hole; the open hole comprises an open part and a clamped part communicated with the open part; the positioning component comprises a base part, an elastic arm, a limiting part and a second stopping part; the base part is connected to the rail component and is positioned; the elastic arm extends from the base part and is connected with the limiting part; the limiting part has a first stopping end corresponding to the clamped part; the second stopping part is connected to the limiting part; and when the first stopping end and the clamped part surround into a locked closed area, the second stopping part props against the first stopping part of the rail component, so that the position of the first stopping end is more steady.

The invention relates to a quick-detachment positioning structure for a rail component. The quick-detachment positioning structure for the rail component comprises an open hole formed in the rail component and a positioning component corresponding to the open hole, wherein the rail component comprises a first stopping part adjacent to the open hole; the open hole comprises an open part and a clamped part communicated with the open part; the positioning component comprises a base part, an elastic arm, a limiting part and a second stopping part; the base part is connected to the rail component and is positioned; the elastic arm extends from the base part and is connected with the limiting part; the limiting part has a first stopping end corresponding to the clamped part; the second stopping part is connected to the limiting part; and when the first stopping end and the clamped part surround into a locked closed area, the second stopping part props against the first stopping part of the rail component, so that the position of the first stopping end is more steady.

The invention discloses an NFC position coordinate navigation system and a guiding method. The navigation system comprises an NFC active communication device and a plurality of NFC passive communication devices, the NFC passive communication devices are fixedly arranged at corresponding predetermined scene positions respectively, an NFC tag is installed in each NFC passive communication device, and the NFC tag stores an information code of the corresponding predetermined scene position; and the NFC active communication device comprises an NFC card reader and a mobile terminal, the mobile terminal stores a navigation database, and the mobile terminal receives an position information code read by the NFC card reader, and compares the position information code with the navigation database toobtain navigation information. The NFC position coordinate navigation system disclosed by the invention realizes the operations of device offline, non remote communication signal and non satellite positioning signal, and effectively solves the problem of positioning failure caused by external factors, and the NFC tag carries the information code of the corresponding predetermined scene position, so that targets different heights of the same coordinate can be identified, and the accuracy of the positioning i improved.

The invention relates to a positioning system for flange welding and a welding method. The positioning system for flange welding comprises a clamping jaw assembly and two transverse pushing assemblies, wherein the clamping jaw assembly is used for clamping the center of a flange, the two transverse pushing assemblies are oppositely arranged, the two transverse pushing assemblies are used for pushing and extruding the flange from two sides respectively so that a welding seam of the flange can shrink in the circumferential direction, and the two transverse pushing assemblies are further used forsynchronously abutting against two opposite side walls of the welding seam so that the two opposite side walls of the welding seam can be aligned in the axial direction. The positioning system for flange welding is advantaged in that positioning faults are not prone to occurring, and positioning before welding is facilitated.

The invention discloses a three-dimensional positioning method for an underwater fixed target based on multi-hypothesis depth. The method comprises the following steps of establishing a coordinate system and storing current moment-relevant information; screening current moment information and historical information through a threshold condition to match the current moment information and the historical information into pairs, listing an equation, and solving the equation to obtain a result; carrying out moving average on an equation result of the same depth; using a moving average result to eliminate values that are inconsistent with the assumed depth and corresponding positioning results, and detecting whether a new measurement value exists; when the new measurement value exists, repeating the above processes; and when the new measurement value does not exist, then ending the positioning. An underwater acoustic positioning system is a system for positioning a target under a certain reference system by ranging or direction-finding underwater targets, and in different target environments, different positioning methods are used.

The invention discloses a pipe fitting positioning device. The pipe fitting positioning device comprises a supporting rod, a positioning assembly and a driving part; the positioning assembly is arranged on the supporting rod in a sleeving mode, the positioning assembly can stretch into the pipe fitting, the positioning assembly comprises a fixed part and at least two movable parts arranged in the circumferential direction of the fixed part, the fixed part is provided with a sliding way in the radial direction of the supporting rod, and the movable parts are in sliding fit with the sliding way; and the driving part is arranged on the supporting rod in a sleeving mode and connected with the fixed part, a driving part is arranged at the side, facing the movable parts, of the driving part, and when the driving part rotates around the supporting rod, the driving part drives the movable parts to move along the sliding way so that the movable part can have a first state of tightly supporting the pipe fitting from the interior of the pipe fitting and a second state of being separated from the inner wall of the pipe fitting. According to the pipe fitting positioning device, the pipe fitting can be tensioned and supported from the interior of the pipe fitting, and the machined area of a pipe workpiece can be effectively increased; and the positioning device can be used for operating the pipe workpiece with a wide pipe diameter range, and has high operation flexibility and adaptability.

The invention discloses a wire clamp for installing a grounding wire at a copper-aluminum transition wire clamp of a transformer and a knife switch lead. The wire clamp comprises a wire clamp main body and wire clamp double tongues, wherein the wire clamp main body is of an inverted U-shaped structure; a middle stopper is arranged at the top of the wire clamp main body, strip-shaped through holesare formed in two sides of the middle stopper, the wire clamp double tongues are two arc-shaped structures, one ends of each of the wire clamp double tongues is hinged with the wire clamp main body, another end of each of the wire clamp double tongues penetrate through the wire clamp main body through a strip-shaped through hole, and reset torsion springs are arranged between the wire clamp doubletongues and the wire clamp main body; when the grounding wire is installed on a transformer lead copper-aluminum transition wire clamp lead, since the wire clamp double tongues are propped open by asemicircular positioning stop fixture, and the caliber of the double openings of the double tongues is greater than the diameter of the wire, the grounding wire can be easily assembled as long as thewire slightly touches the semicircular positioning stop fixture and the positioning stop condition is damaged, and no external force damage is caused to the copper-aluminum transition wire clamp of the transformer.

The invention belongs to the technical field of trackless rubber-wheel vehicles, and particularly relates to a trackless rubber-wheel vehicle auxiliary driving method based on a millimeter wave radar and a UWB tag. The method comprises the following steps: S1, installing a millimeter wave radar and an auxiliary driving device to a trackless rubber-wheel vehicle; S2, establishing a millimeter wave radar coordinate system by taking millimeter waves as poles, and establishing a trackless rubber-wheel vehicle coordinate system by taking the position of the trackless rubber-wheel vehicle as an original point; S3, enabling the auxiliary driving device to communicate with a dispatching center server through a network to obtain related data; S4, enabling the auxiliary driving device to obtain scanning data of the vehicle-mounted millimeter wave radar; S5, enabling the auxiliary driving device to fuse the analysis data and construct a surrounding environment map of the trackless rubber-wheel vehicle; and S6, enabling the auxiliary driving device to calculate the distance between the trackless rubber-wheel vehicle and the obstacle in real time. The trackless rubber-wheel vehicle auxiliary driving method based on the millimeter wave radar and the UWB tag overcomes the defect that accurate positioning cannot be achieved due to the fact that GPS signals are difficult to receive in a coal mine tunnel environment.