49results about How to "Ensure positioning reliability" patented technology

The invention relates to a CORS (Continuously Operating Reference Stations) system-based real-time positioning service method for local coordinates. The method has the beneficial effects that the encryption of seven real ellipsoid conversion parameters is realized by adopting a custom ellipsoid encryption method and the influence of the encryption method on RTK (Real-Time Kinematic) positioning istaken into account to strictly control the offset at the same time; the ellipsoid parameters are converted by adopting an ellipsoid deformation method, thereby eliminating the projection high parameters and solving the contradiction that the projection high parameters cannot be broadcasted in RTCM (Radio Technical Commission for Maritime services) message; generating a grid around a user positionby using the user position as the center, interpolating elevation abnormal values of grid points by using an existing elevation conversion model, generating RTCM residual grid message and broadcasting to the user end, thereby obtaining the normal height of the user end, solving the elevation conversion problem and not affecting the RTK baseline solution at the same time; and by implementing the method disclosed by the invention, after the user terminal receives pseudo conversion parameter message, the Gaussian plane coordinates and the normal height can be directly obtained with no need for configuring any parameters, thereby guaranteeing the security, the real-time performance and the universality of the local coordinate positioning.

The invention discloses a pot washing machine which comprises a base and a brush. A guide shaft is arranged at the bottom of the brush in an axially telescopic manner and connected to the middle of the base through a spherical pair, and the brush is provided with a plurality of water spraying holes. In a use process of the pot washing machine, a pot is put on the base in an upside down manner to enable the brush to be positioned in the pot and contact with the inner wall of the pot; in an operating process of the pot washing machine, the brush is capable of realizing large-angle spiral brushing operation through the spherical pair to completely clean the inner wall of the pot; in a cleaning process, clean water or a detergent can be sprayed through the water spraying holes so as to make itconvenient to flush off greasy dirt in a brushing process. In addition, the guide shaft with an axial telescopic structure is capable of guaranteeing complete fitting of the brush and pots in different depths to guarantee cleaning effects of the pot washing machine. The pot washing machine is integrally compact and delicate in structure, capable of efficiently cleaning single pots in the cleaningprocess, low in power consumption and water consumption and simple, convenient and feasible in an the operating process.

Disclosed is an X-Y movement device for a simple chip mounter. A Y-axis driving motor is arranged on the outer side of a pedestal, the inner side of the pedestal is connected with a Y-axis light bar fixing base through a light bar, the Y-axis light bar fixing base is connected with a fixing pedestal through a Y-direction light bar, a Y-direction gear is arranged on the outer side of the Y-axis light bar fixing base, a gear is arranged on the outer side of the fixing pedestal, a synchronous toothed belt is arranged between the Y-direction gear and the gear and connected with a second fixing pedestal, the second fixing pedestal is slidably connected with the Y-direction light bar, an X-direction gear and an X-direction light bar are arranged on the second fixing pedestal, an X-direction toothed belt is arranged on the X-direction gear 7, a chip mounting head pedestal is arranged on the X-direction light bar, a PCB (printed circuit board) fixing support is arranged below the chip mounting head pedestal, a feed chute is connected with the PCB fixing support, the motor drives the gear to drive the synchronous toothed belt to linearly reciprocate within a certain range, and the synchronous toothed belt moves to drive a linear bearing fixed on a shaft pedestal to realize linkage movement in an X-Y axis direction. The X-Y movement device has the advantages of simple structure and low maintenance cost.

The invention discloses a cable wire stripping mechanism. According to the cable wire stripping mechanism, a structure is simple, the operation is convenient, and the working efficiency is improved. The cable wire stripping mechanism comprises a worktable, wherein a wire releasing roller, a wire stripping assembly and a wire collection assembly are set on the worktable in sequence. The wire stripping assembly comprises a bushing, a pair of brackets and a pair of cutters. The busing is set on the pair of brackets. The pair of brackets are set on the worktable. Penetration holes are set at two ends of the bushing. The pair of cutters are located in the penetration holes. The outer sides of the cutters are connected with cylinders. The wire collection assembly comprises a wire winding roller.The wire winding roller is driven by a motor. The cable wire stripping mechanism is convenient for processing and operation.

The invention discloses a positioning system and method for an automatic driving vehicle, belongs to the technical field of automatic driving of automobiles, and aims to provide a vehicle positioningresult by using an integrated navigation module in a place with a good GPS signal so as to ensure that the vehicle can normally run along a preset track. When the integrated navigation state is not good, a multi-angle coverage laser radar SLAM positioning algorithm is used for providing vehicle state information; when the method is used in a scene with poor integrated navigation and laser SLAM states, short-distance positioning is carried out through lane line information obtained through current data; three positioning schemes are adopted for safety redundancy, and vehicle positioning safetyand positioning reliability are fully guaranteed.

The invention discloses a multifunctional positioning fixture used for production of radar slotted waveguide antennas. The multifunctional positioning fixture comprises a tapered groove mandrel, a pressing mechanism and a central shaft. A tapered groove is formed in the outer surface of the tapered groove mandrel. An adjustment nut is connected to the upper portion of the tapered groove mandrel ina threaded mode. The pressing mechanism is connected to the lower portion of the tapered groove mandrel in the axial direction. The central shaft is connected to the lower portion of the pressing mechanism in the axial direction. A central shaft correction mechanism is arranged in the central shaft. A positioning pin is connected to the lower output end of the central shaft correction mechanism in the axial direction. A bolt is connected to the lower portion of the positioning pin in the axial direction through a washer. The whole multifunctional positioning fixture has the advantage of central shaft positioning and overcomes the defects of large gaps and low machining precision in the mandrel positioning process, the position precision of a shaft hole relative to main machining faces such as the upper and lower surfaces of a shaft body and a main bearing hole is effectively ensured, the center of the shaft hole is used for positioning to achieve machining, and thus, the positioning precision is improved.

The invention provides an integrated navigation positioning method and device based on a short base line. The method comprises the steps of obtaining a PPS signal of a multimode receiver, and carrying out the positioning through an RTK mode, taking positioning information in the PPS signal as an initial value of INS, conducting INS calculation, and acquiring INS information, and combining the successfully positioned PPS signal and the INS information through Kalman filtering to obtain optimal attitude position information. A short base line is adopted, the length of the base line is only 320 mm, two receiving antennas are arranged, the weight is only 5 kg, the device is small and exquisite, movement is convenient, GNSS and INS combined navigation is achieved, fast positioning can be achieved through the INS when a carrier is shielded, a high-precision INS inertial element is adopted, meanwhile, errors of the inertial element are optimized through Kalman filtering, deviation of the INS inertial element can be corrected through positioning information of the GNSS, and the positioning precision and reliability of the system are ensured.

The application discloses an aerial robot integrated positioning method. Data fusion is carried out on GPS and inertial navigation positioning information of an aerial maintenance robot by adopting aKalman filter and optimal estimation is performed on positioning errors, so that correction of integrated navigation errors is realized, and the positioning precision is improved. Meanwhile, an improved neural network is introduced, and a problem that the positioning precision of the overhead maintenance robot becomes poor under the condition that GPS signal receiving is abnormal is solved. When aGPS signal is shielded, the navigation error is predicted by improving the neural network, so that the positioning precision and reliability of the maintenance robot when the GPS signal is unavailable are ensured, and a technical problem that the positioning information of the aerial robot is inaccurate when the GPS signal is abnormal is solved.

The invention belongs to the field of intermediate case design, and relates to an engine intermediate fulcrum outer ring supporting structure which comprises a bearing, a low-pressure rotor, a high-pressure rotor and a sealing ring. The outer ring of the second bearing is axially compressed and positioned by arranging the mounting side plate to be in bolted connection with the sealing ring and the low-pressure rotor, a bearing seat and a first compression nut in a traditional structure are omitted, and the mounting side plate is arranged between the sealing ring and the low-pressure rotor, so that the outer ring of the second bearing is axially compressed and positioned at the same temperature. Thermal barrier deformation on the sealing ring and the low-pressure rotor can only be transmitted to the mounting side plate, the outer ring of the second bearing cannot be influenced by the sealing ring and the low-pressure rotor, the bearing cannot be loosened, the problems of vibration of the whole machine, damage to the bearing and the like cannot be caused, and the safety of the engine can be guaranteed; and the relative positions of the sealing ring, the mounting side plate and the low-pressure rotor are not changed, so that the mounting side plate, namely the reliable axial and radial positioning of the bearing, is realized, and the positioning reliability of the intermediate fulcrum outer ring is ensured.

The invention relates to a cutting device for angle steel. The cutting device comprises a rack (1) and a V-shaped positioning block (2) arranged on the rack (1). The angle steel (3) is placed in the V-shaped positioning block (2). A cutter (4) which is located at the upper portion of the V-shaped positioning block (2) and corresponds to the V-shaped positioning block (2) is arranged on the rack (1). The cutter (4) comprises a positioning block (41) and a cutting knife (42). The section of the positioning block (41) is in a V shape, and corresponds to the inner wall of the angle steel (3) to position the angle steel (3). The section of the cutting knife (42) is in a V shape. The cutting knife (42) comprises a knife body (421) and a blade (422). The blade (422) is arranged on one side of the knife body (421) and protrudes out of the knife body (421). The positioning block (41) is lower than the cutting knife (42). The cutting device for the angle steel is simple in structure, and can well cut the angle steel.

The invention relates to the technical field of satellite positioning systems and positioning measurement, and provides a BDS/GPS reference station low altitude angle satellite integer ambiguity determination method. The method comprises the following steps: dividing BDS/GPS high altitude angle and low altitude angle satellites; calculating three kinds of wide lane carrier phase integer ambiguityby using a high altitude angle satellite three-frequency carrier phase observation value and a pseudo-range observation value; calculating the carrier phase integer ambiguity by utilizing the carrierphase observation value for eliminating the ionospheric delay error based on the forced distance limiting relation, and establishing ionospheric and tropospheric delay error models by utilizing the carrier phase observation value; calculating a delay error corresponding to the low altitude angle satellite and the second and third wide lane carrier phase integer ambiguity, and calculating the carrier phase integer ambiguity by using the third wide lane observation data according to the carrier phase observation value for eliminating the ionospheric delay error and a tropospheric delay error model. According to the method, the precision of determining the BDS/GPS low altitude angle satellite carrier phase integer ambiguity can be improved.

The invention relates to a universal aircraft airborne integrated navigation system and method, and solves the problems of single navigation mode, low navigation precision and reliability and incapability of realizing an autonomous navigation function of the existing universal aircrafts. The system comprises a navigation data receiving module, a navigation mode judging module and a navigation positioning resolving module; the navigation data receiving module is used for receiving real-time information sent by airborne receiving equipment, and the airborne receiving equipment comprises a GPS/Beidou satellite receiver, a VOR receiver, a DME receiver and an atmospheric navigation attitude system; the navigation mode judgment module is used for judging which navigation mode is adopted for comprehensive positioning, and the navigation modes comprise a GPS/Beidou satellite navigation mode, a radio DME/DME navigation mode, a radio VOR/DME navigation mode and a bitwise reckoning navigation mode; and the navigation positioning resolving module is used for calculating position information of a current airplane according to the selected navigation mode.

The invention discloses an indoor positioning method based on WiFi, and the method comprises the steps: selecting a plurality of reference position points indoors, and collecting the WiFi signal intensity of each WiFi signal source at each reference position point; performing noise reduction processing on the WiFi signal intensities of the plurality of WiFi signal sources of each reference position point to obtain a signal intensity characteristic value of each reference position point; when positioning is carried out, acquiring WiFi signal intensities of a plurality of WiFi signal sources collected by a current position point, and carrying out noise reduction processing to obtain a signal intensity characteristic value of the current position point; and performing similarity comparison on the signal intensity characteristic value of the current position point and the signal intensity characteristic value of each reference position point, and setting the reference position point with the highest similarity as the current position point. The problems that in the prior art, positioning interference is large, positioning precision is poor, and equipment needs to be rearranged for public places with different indoor patterns can be solved.

The invention discloses a composite hole machining cutter capable of being spliced and combined. The composite hole machining cutter capable of being spliced and combined comprises a first cutter body and the like; the first cutter body is fixed above a second cutter body which is fixed above a third cutter body; an upper fastening screw is located on the second cutter body; a lower fastening screw is located on the third cutter body; an outer blade is installed on one side of the first cutter body; an auxiliary blade is installed on one side of the second cutter body; an inner blade is installed on one side of the third cutter body; a square table is arranged on the upper portion of the second blade body; a square table is arranged on the upper portion of the third cutter body; a conical table is fixed to each square table; a protective edge is fixed to the first cutter body; a protective edge is fixed to the second cutter body; a protective edge of fixed to the third cutter body; conical grooves are located above square grooves and located below the square tables; the first cutter body, the second cutter body and the third cutter body are each provided with a step hole; and threaded holes are located in the left sides of the step holes. The composite hole machining cutter capable of being spliced and combined is simple in structure, reliable in performance and capable of being used under the heavy load condition, the cutter utilizing rate is increased, and cost is saved.

The invention relates to the technical field of squirrel-cage elastic support bearings, and discloses a squirrel-cage elastic support bearing capable of improving installation accuracy. The squirrel-cage elastic support bearing comprises mounting blocks and a rotor, cylindrical grooves are transversely formed in the left sides of the mounting blocks, round holes are formed in one sides, far away from the groove openings, of the cylindrical grooves, the right end of the rotor penetrates through the cylindrical grooves and the round holes and extends to the outside of the mounting blocks, fixedrings are arranged in the cylindrical grooves, the inner sides of the fixed rings are in interference fit with the side wall of the rotor, the side walls of the fixed rings are movably connected withretainers in a sleeved mode, a plurality of uniformly distributed rollers are slidably connected in the retainers, and annular mounting grooves are formed in the outer sides of the fixed rings. The squirrel-cage elastic support bearing capable of improving installation accuracy can reduce installed parts and reduce installation error between matched components, ensures the positioning reliabilityof a bearing outer ring and a squirrel-cage elastic support, effectively lubricates and cools the squirrel-cage elastic support bearing to prevent faults such as bearing locking can be prevented.