Patents
Literature
Eureka-AI is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Eureka AI

1229 results about "Rotary encoder" patented technology

A rotary encoder, also called a shaft encoder, is an electro-mechanical device that converts the angular position or motion of a shaft or axle to analog or digital output signals. There are two main types of rotary encoder: absolute and incremental. The output of an absolute encoder indicates the current shaft position, making it an angle transducer. The output of an incremental encoder provides information about the motion of the shaft, which typically is processed elsewhere into information such as position, speed and distance.

High-precision map generation system and method based on high-definition ortho-photo map

The invention provides a high-precision map generation system and a high-precision map generation method based on a high-definition ortho-photo map. The system comprises an image shooting module, a horizontal laser radar, a GPS (global positioning system) processing module, an inertial navigation module, a rotary encoder, an image and data preprocessing module and a geographical information processing module, wherein the vehicle-mounted image shooting module is used for acquiring a road image; the laser radar is used for scanning a barrier and acquiring geographical information data; the precision of GPS information is optimized; the ortho-photo map of the road image is acquired and then is rotated and sheared to generate corresponding geographical information file operation; a full ortho-photo map sequence and a corresponding geographical information file are combined and spliced to generate a base map of a global map; various types of geographical information data are marked on the base map of the map. According to the method and the system, a high-precision navigation map can be generated, and the data precision can reach centimeter level; the method and the system are extremely high in practical value on an advanced auxiliary driving system and an unmanned vehicle.
Owner:SHANGHAI JIAO TONG UNIV

High-precision map data structure, high-precision map data acquiringand processing system and high-precision map data acquiringand processingmethod

The invention provides a high-precision map data structure, ahigh-precision map data acquiringand processing system and a high-precision map data acquiringand processingmethod. The high-precision map data structure adopts a layering structure and comprises four layers of structures in total, wherein all layers of data are inter-related, i.e., the first layer is a road network; the second layer is a lane network and is related to roads of the first layer; the third layer is lane line information and simultaneously is related to roads of the second layer; and the fourth layer is special information data. The system comprises a panoramic image shooting and processing module, a GPS processing module, an inertial navigation module, a rotary encoder and a geographicinformation processing module. According to the invention, a panoramic camera is used for shooting panoramic images of the roads, simultaneously, GPS original data, inertial navigation device data, rotary encoder data are acquired, different perspectives of projection images of single panoramic image, corresponding GPS and vehicle course angle information are obtained by processing the data, and then geographicinformation data of roads is labeled according to the defined data structure, so that a high-precision map is obtained.
Owner:SHANGHAI JIAO TONG UNIV

Metro tunnel fracture surface deformation detection system

ActiveCN101943577AWith long-term useWith automatic monitoringMeasurement devicesRailway auxillary equipmentData processing systemEngineering
The invention discloses a metro tunnel fracture surface deformation detection system, belonging to the tunnel engineering monitoring technical field. The system comprises a fracture surface scanning device, a mileage positioning device, an electrical equipment control device, a power source, a track detection vehicle and a station data processing system, wherein, the fracture surface scanning device, the mileage positioning device and the electrical equipment control device are arranged on the track detection vehicle; the power source is respectively connected with the fracture surface scanning device, the mileage positioning device and the electrical equipment control device through a power source convertor to supply power for the fracture surface scanning device, the mileage positioning device and the electrical equipment control device; a PLC controller is arranged in the electrical equipment control device; a rotary coder in the mileage positioning device, a sensor in the fracture surface scanning device and a rotary table stepped driver are respectively connected with the PLC controller; the PLC controller is connected with a wireless communicator through a wireless communicator in the station data processing system. The whole detection system of the invention has high portable integration degree, automatic operation process, convenient operation, low specialty technical requirements, rapid operation speed, extremely-time section surface measuring and high measuring precision, and the system precision is less than 3mm.
Owner:上海地铁盾构设备工程有限公司

Multiple-loop absolute type rotary encoder based on rotating transformer

The invention relates to a multiturn absolute rotary encoder based on a rotary transformer, which is characterized in that: a sensor is displaced by taking the rotary transformer as a shaft angle; a shaft angle decoding circuit can be formed by adopting DSP as a core processor; a sine wave which can be controlled by frequency and phase in the method that the circuit is synthesized by direct digital frequency for the numerical control of an oscillator; and the sine wave is directly taken as an excitation rotary transformer signal via a power amplifier and a filter circuit; the rotary transformer signal is transferred to A/D converter after being run through a matching circuit of electronic transformer; after sampling, digital filtering and digital signal processing, the sine and cosine value for the actual angle of two channels is generated; the angle error change is tracked dynamically by the PI algorithm; the mechanical displacement of the rotating object is converted into digital shaft angle position and speed. The multiturn absolute rotary encoder based on a rotary transformer has the advantages of high tracking speed, high conversion accuracy, high reliability, simple structure, sensitive movement, low environmental condition, strong anti-interference capability, high measuring accuracy and speed voltage output.
Owner:连云港杰瑞电子有限公司

High-precision laser photocuring 3D (three dimensional) printer

The invention relates to a high-precision laser photocuring 3D (three dimensional) printer. The high-precision laser photocuring 3D printer comprises a shell and a pedestal. The high-precision laser photocuring 3D printer has the beneficial effects that one end of a high-precision ball screw is connected with a servo motor, the control precision of the servo motor is guaranteed by a rotary encoder at the rear end of a motor shaft and is accurate, and the high-precision laser photocuring 3D printer utilizes the servo motor, so that the printer is stable, and the energy consumption is reduced; as the ball screw has the characteristics of high positioning precision, small friction force, high rigidity and strong load capacity, the molding precision of the printer is high; a circuit control module is connected with a touch screen and a power supply switch respectively through data wires to intelligently control the printer, so that the control precision and processing efficiency are increased; a digital projection device comprises a digital projector horizontally fixed on the upper side of the pedestal, and a plane mirror, so that the structure of the printer is compact; the digital projection device comprises an ultraviolet source and a focusing lens, and the focusing lens is arranged above the ultraviolet source, so that the realizing theory is simple, and the cost performance is high.
Owner:RUIAN MAITIAN NETWORK TECH

Device for detecting comprehensive performance of ball screw assembly in loaded state

InactiveCN103389205ARealize detectionReal-time detection of the number of rotationsMachine gearing/transmission testingCouplingBall screw
A device for detecting comprehensive performance of a ball screw assembly in a loaded state comprises a testboard machine body fixed on a cast iron platform, wherein a servomotor is arranged at one end of the testboard machine body; the output shaft of the servomotor is connected to one end of the ball screw assembly through a first coupler, a dynamic torque sensor and a second coupler; an eddy current sensor and a rotary encoder are arranged at the other end of the testboard machine body; a grating scale and an infrared temperature sensor are arranged on the testboard machine body; a rolling guide rail is arranged on the testboard machine body, and is provided with an analog working table; the analog working table is connected to the rolling guide rail through a rolling guide rail slide block, and is connected to a loading device; a ball screw assembly nut is arranged on the analog working table through a nut support base. The device is stable in properties, quick in movement and testing response speed, comprehensive and accurate in testing performance parameters, and simple in structure, and can realize the comprehensive performance detection of ball screw assemblies with different models in no-loaded states or loaded states.
Owner:XI AN JIAOTONG UNIV

Foldable radar antenna lifting mechanism based on space link multi-oil-cylinder coordinated drive

The invention relates to a foldable radar antenna lifting mechanism based on space link multi-oil-cylinder coordinated drive. The foldable radar antenna lifting mechanism based on space link multi-oil-cylinder coordinated drive comprises a first-stage parallel mechanism, an auxiliary turnover mechanism, a second-stage parallel mechanism, a supporting platform mechanism, a first rotary encoder, a second rotary encoder and a horizontal sensor, wherein the first-stage parallel mechanism is installed on the auxiliary turnover mechanism, the upper portion of the second-stage parallel mechanism is installed on the auxiliary turnover mechanism, the bottom portion of the second-stage parallel mechanism is installed on the supporting platform mechanism, the first rotary encoder, and the horizontal sensor are installed on the first-stage parallel mechanism, and the second rotary encoder is installed on the second-stage parallel mechanism. The foldable radar antenna lifting mechanism based on space link multi-oil-cylinder coordinated drive has the advantages that the control accuracy and the safety are high, the rigidity is high, the stability during lifting is better, the lifting capacity is great, the spreading and folding speed is fast, the space occupied by the mechanism after being folded is small, multiple transportation manners are compatible, and the contradictions between the lifting height and the lifting capacity and between the lifting height and the mobility are effectively solved.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST

Automatic sorting machine

The invention relates to logistics equipment, in particular to an automatic sorting machine used for sorting parts of cased objects including a cased medicine. The automatic sorting machine comprises a roller type rack, a sorting mechanism, a horizontal moving mechanism, a helical gravity collector groove, a belt type conveyer and an electric control system corresponding to the belt type conveyor, wherein a sorting electromagnet and a shutter electromagnet of the sorting mechanism as well as a drive motor and a rotating coder of the horizontal moving mechanism are respectively connected with the electric control system of the belt type conveyor through control lines, and the electric control system is connected with an upper control computer though a data bus. The invention has the advantages of compact structure, large medicine or object storage quantity, wide application range, high sorting efficiency, flexible sorting action without damaging medicines or objects and good sorting quality; and the medicine or objects sorted from all layers are automatically collected to the belt type conveyor through the helical gravity collector groove, and can be conveyed to a medicine or object package working station according to the demands or directly to a medicine distributing window or object selling window, thus the automatic sorting machine is convenient for operation and high in automation, and saves time and labor.
Owner:QILU UNIV OF TECH

Coarse and fine scanning rotating prism device

InactiveCN102955251ASatisfy rough scan requirementsMeet fine scanning requirementsOptical elementsElectric machineGear wheel
The invention relates to a coarse and fine scanning rotating prism device, which comprises a prism and an inner and outer prism frame assembly, a worm and gear movement mechanism, a rotary motor, a yaw motor and a rotating half shaft assembly, an anti-backlash motor and an anti-backlash gear assembly, a rotary encoder assembly, a deflection encoder assembly, a rectangular frame and a base, wherein the rotary motor drives the prism and the inner and outer prism frame assembly through the worm and gear mechanism to realize full circumferential rotation, and the yaw motor is directly coupled with the rectangular frame to realize the yaw movement of the prism and the inner and outer prism frame assembly; and the whole device is arranged on the base. The prism is driven by the worm and gear mechanism to realize the full circumferential large-range rotation, and the coarse scanning requirements of dynamic beams are met; and a rotary movement mechanism and a yaw movement mechanism are nested to be combined, so that the integration of coarse and fine scanning functions is skillfully realized in a single set of devices, and the problems that the dispersal spatial structure is brought by a coarse and fine scanning separation design and the coarse and fine error term of the system is difficult to separate and traceably amend are avoided.
Owner:TONGJI UNIV

Simulation experiment platform and experiment method for motion of cord suspension parallel mechanism

A simulation experiment platform and an experiment method for motion of cord suspension parallel mechanism, mainly comprise a machine frame, a suspension platform, wire ropes, directive wheels, rope devices, plates and a detection control system. The directive wheel is installed on the top of the machine frame. One end of each wire rope is enlaced on the rope device, and the other end is connected to the suspension platform rounding the directive platform. Rope devices are installed on the plates, and the plates are fixed on the plate brackets at the two sides of the machine frame. The detection control system comprises tension sensors, stay rectilinear transducers, rotary encoders, an attitude reference, a wireless data collection launcher, a wireless data receiver, a PLC controller, a transducer and an industrial personal computer. The experiment platform can simulate the suspension platform dynamic behavior and wire rope strain change event when process during the suspension platform centroid eccentricity and wire rope operation speed out of sync, and can examine the control performance of the controller when the designed suspension platform is in a steady operation. The experiment platform and the experiment method have a tight structure, a small space usage and a high automaticity.
Owner:CHINA UNIV OF MINING & TECH

Liquid level detection type self-calibration high-precision water gauge

A liquid level detection-type self-calibration high-precision water level gauge comprises a controller, a steel wire take-up pulley, a motor, a measurement driving wheel, a rotary encoder, a steel wire rope and a heavy hammer. A rotating shaft of the motor is connected with a rotating shaft of the steel wire take-up pulley; the steel wire take-up pulley is wound with one end of the steel wire rope, and the other end is connected with the heavy hammer through the measurement driving wheel; the rotary encoder is connected with a measurement driving wheel shaft; the controller includes a central processing unit which outputs a motor control signal to a motor driving unit to drive the motor to rotate; a zero position detection signal of a heavy hammer zero position detection unit, a water surface detection signal of the heavy hammer arriving at a water surface detection unit, and an encoding impulse signal of an encoder impulse detection unit are input to the central processing unit; and the data is processed by the central processing unit which also transfers the data to an external data processing unit. By adopting the active liquid level detection method and the zero position self-calibration method, the invention can prevent the heavy hammer from dropping into the water, and eliminate the accumulated error produced by the skidding of the steel wire rope and the impulse loss of the encoder, thereby ensuring high-precision and wide-range measurement of the water level.
Owner:GUANGZHOU SUNTRANS MEASUREMENT & CONTROL SYST

Variable pitch system for offshore high-power wind driven generator group and control method for variable pitch system

The invention discloses a variable pitch system for an offshore high-power wind driven generator group and a control method for the variable pitch system. The system comprises independent variable pitch driving systems on each blade, a variable pitch control system, a limit switch, an angular coder and a sliding ring, wherein the variable pitch driving systems are arranged in a hub on the front part of a cabin; the communication and the motive power of the variable pitch driving systems are realized through the sliding ring connected with the main control system in the cabin; and the variable pitch control system is used for allocating instructions from the main control system in the cabin to drivers and feeding back related signals detected by the angular coder, a rotation coder, the limit switch and a blade root sensor to the main control system in real time. In the variable pitch system, the force bearing acceleration sensor is arranged at a blade root and is used for detecting different applied forces of blades at different positions and feeding back to the variable pitch control system, and the variable pitch control system is used for sending a corresponding instruction to the driving systems, so that the size of a pitch angle is separately corrected, and the variable pitch system is completely independent.
Owner:DALIAN DESIGN INST CO LTD CHINA FIRST HEAVY IND +1

Machine vision based full-automatic rotation printed product defect detection device

InactiveCN106525873AGood quality inspectionOvercome the problem of not being able to detect the defects of printing products on complex curved surfaces of rotary bodiesMaterial analysis by optical meansPrinting press partsSoftware systemEngineering
The invention discloses a machine vision based full-automatic rotation printed product defect detection device which comprises an industrial control computer, supporting facilities of the industrial control computer, an image defect detection software system, a signal transmission unit, an image collection unit, a loading manipulator system, an unloading manipulator system and a product clamping rotation system; the industrial control computer is electrically connected with the image collection unit through the signal transmission unit; the image collection unit is formed by combining an image collection processing card, a CCD industrial camera, an optical lens and a detection light source together; the signal transmission unit is formed by three parts including an I/O (input/output) card, a synchronous card and a rotary encoder; and the product clamping rotation system is mainly used for fixing a product and driving the product to rotate. The machine vision based full-automatic rotation printed product defect detection device has the characteristics of no contact, high detection precision, rapidness, accuracy, high repeatability and high automation degree, relieves the manual detection pressure, solves various problems in manual detection, improves the detection quality, and increases the detection speed.
Owner:广州市申发机电有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products