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

75results about How to "Reduce calibration process" patented technology

Absolute calibration method for radiation intensity of Hadamard transform imaging spectrometer

The invention relates to an absolute calibration method for the radiation intensity of a Hadamard transform imaging spectrometer. In the method, an integrating sphere light source, a uniform attenuation sheet, an electric translation platform capable of translating along a direction vertical to an optical axis, a Hadamard transform spectrometer, a spectrometer radiation intensity meter, a main control computer and a camera obscura are arranged, wherein the Hadamard transform spectrometer and the spectrum radiation intensity meter are fixedly arranged on the electric translation platform respectively, and are arranged at the two ends of the electric translation table along the translation direction; the electric main control computer can be used for controlling the translation of the electric translation table; the electric main control computer is connected with the Hadamard transform spectrometer and the spectrum radiation intensity meter respectively to acquire output data of the Hadamard transform spectrometer and the spectrum radiation intensity meter; and light emitted from the integrating sphere light source can vertically enter the Hadamard transform spectrometer or the spectrum radiation intensity meter after passing through the attenuation sheet. Due to the adoption of the method, the technical problem of the lack of a calibration method for the radiation intensity ofa front slot type Hadamard transform spectrum spectrometer is solved. The calibration method is simple, and has high efficiency.
Owner:西安中科英特光谱科技有限公司

Rapid vehicle distance measurement optimization method for vehicle-mounted binocular system

The invention discloses a vehicle distance measurement method based on a vehicle-mounted binocular camera. The method is characterized by comprising steps as follows: S1, vehicle detection is performed at the angle of view on one side of the binocular camera according to target vehicle texture information and prior road information, the position of a vehicle and the distance away from the vehicleare determined; S2, similarity matching of the target vehicle at the angle of view on the other side of the binocular camera is performed, a matching position with higher similarity is selected, the center offset of the target vehicle at two angles of view is determined, and the actual position of the target vehicle and the distance away from the vehicle are determined according to the center offset; S3, a confidence interval of the binocular camera is determined according to parameters of the binocular camera, the actual position of the target vehicle and the distance away from the vehicle, which are determined according to the center offset, are output in the confidence interval of the binocular camera, and the vehicle detection reliability is verified through an offline training classifier outside the confidence interval. With the adoption of the method, the vehicle distance measurement accuracy is improved.
Owner:ZHEJIANG LEAPMOTOR TECH CO LTD

Calibration device and method for loading position of mining area driverless system

The disclosure provides a calibration device for loading position of a mining area driverless system . The calibration device is characterized by comprising loading equipment for bearing a vehicle-mounted computer system, a vehicle-mounted positioning system and a vehicle-mounted wireless communication system and for calibrating a loading position. The vehicle-mounted positioning system is used for acquiring position coordinates and attitude directions of the loading equipment; the vehicle-mounted wireless communication system is used for realizing communication between the vehicle-mounted computer system and external equipment; and the vehicle-mounted computer system comprises a data acquisition unit, a data release unit and an information data transmission control unit, and is used for calculating the loading position according to the position coordinates and the attitude direction. According to the invention, the loading position is rapidly calibrated in the modes of attitude position model fitting, topographic data matching, loading position model calculation and the like, the tedious sensor calibration process of other bucket positioning modes is reduced, the loading positioncalibration difficulty is greatly reduced, and the calibration precision and speed are improved.
Owner:上海易澳科技有限公司

Calibration method and calibration system for tool coordinate system of robot

The invention provides a calibration method and calibration system for a tool coordinate system T-xyz of a robot. The calibration method comprises the following steps that a target ball of a laser tracker is mounted on a tool; according to DH parameters of the robot, a base coordinate system O-xyz of the robot and the tool coordinate system T-xyz are established, and the tool coordinate system T-xyz is established with a preset position of the target ball as the coordinate center, wherein the tool coordinate system T-xyz is consistent with a coordinate system E-xyz of the joint at the tail endof the robot in direction; the robot is moved to any non-singular point, and the angles of joints are recorded; and a relative distance H between the preset position of the target ball mounted on thetool and the laser tracker is measured through the laser tracker, and the tool coordinate system T-xyz is calibrated according to the data. According to the calibration method and calibration systemfor the tool coordinate system T-xyz of the robot, the test cost is reduced under the condition that the measurement precision is not reduced; according to the calibration method, the coordinate system of a tool can be solved theoretically by calibrating only one point, so that the calibration process is shortened; and according to the calibration method, the laser tracker and a software system are used, and a closed-loop system among the coordinate systems is formed by building a mechanical model and actual measurement data, so that the calibration method is convenient and rapid and high in operability.
Owner:GREE ELECTRIC APPLIANCES INC

Self-adaptive control method for synchronizer-free transmission intermediate shaft brake of commercial vehicle

ActiveCN106438779AAutomatic adjustment of control parametersAchieve consistent shift qualityGearing controlBrake actuating mechanismsElectricitySelf adaptive
The invention relates to a self-adaptive control method for a synchronizer-free transmission intermediate shaft brake of a commercial vehicle. The method is characterized by specifically including the steps a transmission control unit (TCU) needs to learn initial parameters of a newly-matched transmission intermediate shaft brake system and learns the initial parameters of the intermediate shaft brake on the conditions that the vehicle is static and an engine is idle; the TCU learns control parameters of separation of a clutch and braking of the intermediate shaft brake in the learning process of the initial parameters of the intermediate shaft brake, outputs the parameters of the intermediate shaft brake after learning is completed and gets connected to the clutch; and the TCU realizes the function of learning the parameters of the intermediate shaft brake and automatically loads data of the parameters of the intermediate shaft brake after recharged. The method has the advantages that the control adaptability is high, the control robustness is good, data of the TCU are calibrated little, the research and development cycle of products is short, and the homogeneity of the products is good.
Owner:CHINA FIRST AUTOMOBILE

Single-sensor double closed-loop urea-selective catalytic reduction (SCR) feedback control method based on observer

The invention discloses a single-sensor double closed-loop urea-selective catalytic reduction (SCR) feedback control method based on an observer. According to a calibration test of a relation map between cross-sensitivity factors of an NOx sensor and the exhaust gas temperature and on the basis of a urea-SCR system mathematical model, a non-linear Kalman filtering observation theory is adopted and the diesel engine urea-SCR system C<NOx> and C<NH3> parameter observer based on data/mechanism is designed. Two estimators of C<NOx> and C<NH3> and the difference value of the respective target values are used as inputs of a controller, and a urea injection double closed-loop feedback controller is designed. The observer/controller and the NOx sensor arranged at the exhaust end of a urea-SCR system are used as main parts to establish the urea injection feedback control system. By means of the single-sensor double closed-loop urea-SCR feedback control method based on the observer, the hardware cost is reduced; the compromise control effect can be achieved through a double closed-loop system under the condition of single control input, limits of authority, double-output constraint and mutual contradiction; the observer is simple and reasonable in design; too many calibration processes during development of an engine electronic control unit can be reduced through the data/mechanism observer, and the strategic flexibility and universality are controlled.
Owner:JILIN NORMAL UNIV

Pintle chain bending plate forming device

The invention relates to a pintle chain bending plate forming device. The pintle chain bending plate forming device comprises an upper die structure and a lower die structure, wherein the upper die structure comprises an upper die plate, an upper base plate, an upper die base and an upper forming die, the upper die plate, the upper base plate and the upper die base abut against one another, the upper forming die is installed on the upper die base, the lower die structure comprises a positioning block, a lower forming die, a lower base plate, a bottom plate, a floating block, an ejector rod and an elastic block, a groove used for bending of a workpiece is formed in the center of the lower forming die, the positioning block is installed on the lower forming die, the floating block is arranged in the groove, the lower forming die and the bottom plate are installed in a matched mode through the lower base plate, ejector rod through holes are formed in the middle of the lower base plate and the middle of the bottom plate, the size of the groove is larger than that of the through hole in the middle of the lower base plate and that of the through hole in the middle of the bottom plate, the elastic block is fixed through an upper clamping plate and a lower clamping plate, one end of the ejector rod abuts against the floating block after penetrating through the through hole in the middle of the lower base plate and the through hole in the middle of the bottom plate, and the other end of the ejector rod is installed on the upper clamping plate and is in contact with the elastic block. According to the pintle chain bending plate forming device, the depth of parallelism of the two edges of a chain bending plate is increased, the precision of arcs bent by the chain bending plate is improved, the correction process and the chamfering process are omitted, and the quality of a chain is improved.
Owner:HUANGSHAN ZHONGYOU CHAIN MFG CO LTD OF ANHUI

Automatic calibration device and method for laser displacement sensor

PendingCN113608198AEasy to adjustReduce the calibration processWave based measurement systemsLight spotLight beam
The invention relates to an automatic calibration device and method for a laser displacement sensor. A laser displacement sensor and a laser interferometer are arranged on the two sides of a moving table top respectively, a light beam analyzer is arranged on the moving table top to achieve light spot measurement, and during calibration, a standard measured object is controlled to move in a stepping mode from the near end of a measuring range to the far end of the measuring range; laser displacement sensor data, laser interferometer data and light beam analyzer data at each sampling position are recorded, after full-scale scanning is completed, linear deviation is calculated according to laser displacement sensor readings and laser interferometer readings at different positions, and a calibration table is generated for calibration; and the shape and direction of the measurement light beam are fitted according to the section light spot data at different positions so as to adjust parameters such as focus and direction. The device can realize simultaneous measurement of linear deviation of the laser displacement sensor and single scanning of a light beam shape, is suitable for calibration of laser displacement sensors with various measuring ranges, and can remarkably improve calibration precision and production efficiency.
Owner:苏州创视智能技术有限公司

Beidou RDSS radio frequency transmission signal detection device

The invention discloses a Beidou RDSS radio frequency transmission signal detection device, comprising a host, a Beidou RDSS unit for receiving BeiDou RDSS satellite data, and a BeiDou RNSS / GPS unit for receiving BeiDou RNSS navigation satellite data and GPS satellite data. A power supply management unit is used for supplying power to the Beidou RDSS unit, the Beidou RNSS / GPS unit and the host. Further included is a radio frequency transceiver frequency conversion chip for receiving an output signal of a low noise amplifier. An intermediate frequency output end and an intermediate frequency input end of the radio frequency transceiver frequency conversion chip are both connected with an intermediate frequency filter. While detecting radio frequency signal parameters, such as power, frequency accuracy, modulation errors and the like, the device of the invention realizes digital signal processing through a built-in ADC module and an FPGA, can accurately demodulate modulated information,realizes the diagnostic function of a RDSS user equipment transmission link, greatly reduces the inspection cost, is convenient and quick, and greatly improves the inspection efficiency. The device ofthe invention not only allows the free selection of an analog intermediate frequency signal and a digital intermediate frequency signal, but also facilitates the adjustment of a clock output frequency.
Owner:GUANGXI TEACHERS EDUCATION UNIV

Knurling machine

The invention discloses a knurling machine comprising a motor and a reduction gearbox. A motor shaft of the motor is in transmission connection with an input shaft of the reduction gearbox, a workingshaft is fixedly connected to the outside of an output shaft of the reduction gearbox, the working shaft is fixedly provided with a first gear, a transverse slide rail is arranged at one side of the working shaft, the slide rail is provided with a sliding plate seat which is in slide match with the slide rail, the sliding plate seat is rotatably provided with a first transmission shaft and a second transmission shaft parallel to the working shaft, the first transmission shaft and the second transmission shaft are provided with knurling wheels matched with each other, the second transmission shaft is provided with an eccentric wheel, an idle wheel seat is arranged at the right side of the slide rail, the idle wheel seat is rotatably provided with an idle wheel fork, and the front end of theidle wheel fork is provided with an idle wheel in matched transmission with the eccentric wheel. By using a symmetric processing method of active and passive knurling machines, the invention ensuresconcentricity of workpieces, saves correction procedures, greatly improves the processing accuracy and efficiency of products, and also reduces the processing cost, greatly saves the investment of apparatus, reduces the maintenance expense and saves the occupation of work sites.
Owner:铜陵长江电动工具二厂

Non-welding type piezoelectric vibrator connecting device and ultrasonic flow detection device adopting same

The invention discloses a non-welding type piezoelectric vibrator connecting device and an ultrasonic flow detection device adopting the non-welding type piezoelectric vibrator connecting device. The non-welding type piezoelectric vibrator connecting device comprises a turncap, a sleeve and a piezoelectric vibrator seat. A turncap inner cavity is formed in the turncap, a turncap inner cavity step surface is arranged in the turncap inner cavity, one end of the sleeve is inserted into the turncap inner cavity and abuts against the turncap inner cavity step surface, and the other end of the sleeve is fixedly connected with the piezoelectric vibrator seat; an annular cavity is arranged in the piezoelectric vibrator seat, the annular cavity is used for embedding and installing a piezoelectric vibrator, and an annular cavity step surface for limiting the piezoelectric vibrator is arranged in the annular cavity; a first wire hole and a second wire hole which are communicated with the annular cavity are formed in the side walls of the two sides of the piezoelectric vibrator seat respectively. and a first signal wire and a second signal wire are electrically connected with two electrodes of the piezoelectric vibrator through the first wire hole and the second wire hole respectively. According to the invention, the signal wires are connected with the piezoelectric vibrator electrodes in a crimping manner, so that the influence ofhigh welding temperature and welding spot consistency on the working characteristics of the piezoelectric vibrator is avoided; and a piezoelectric vibrator can be replaced more conveniently when being damaged.
Owner:ZHEJIANG CHEER TECH CO LTD
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