393results about How to "High precision" patented technology

A navigation-controlling method of agricultural machine includes measuring out current attitude and movement state data of agricultural machine by navigation transducer, applying dynamic-target point searching algorithm to calculate out horizontal tracking error and longitudinal heading deflection, using fuzzy-PID control algorithm to calculate out operation-control value and carrying out actual control on agricultural machine according to said operation-control value for realizing path-tracking.

There is provided a system and method for operating at least one electronic parcel compartment facility. The parcel compartment facility comprises several compartments in a number amounting to F, with which mailpieces of at least two user groups A and B having different access rights can be deposited into the compartments of the parcel compartment facility, whereby the parcel compartment facility is in communication with a central data processing unit. The occupation status of the compartments of the parcel compartment facility is transmitted to the data processing unit so that the number Y of different sizes of free compartments of the parcel compartment facility is stored in a memory of the data processing unit. The central data processing unit is also in communication with at least one mail distribution center where destination information about the mailpieces is acquired, whereby the destination information is associated with the parcel compartment facility. An exemplary method comprises specifying a period of time Z between a starting point in time and an ending point in time and storing the period of time Z in a data processing unit of the mail distribution center. The exemplary method also comprises acquiring destination information and sizes of the mailpieces in the mail distribution center using a data acquisition device. The exemplary method additionally comprises determining the X number of mailpieces whose destination information acquired during the period of time Z matches the destination information of the parcel compartment facility by the data processing unit of the mail distribution center and transmitting the number X by the data processing unit of the mail distribution center to the central data processing unit. The exemplary method further comprises comparing the number X to the number Y of free compartments and assigning X free compartments of the parcel compartment facility to a first user group A by the central data processing unit if Y≧X. The exemplary method also comprises transmitting a control command for the reservation of the X free compartments of the parcel compartment facility assigned to the first user group A by the data processing unit to a control unit of the parcel compartment facility, and subtracting the number X of reserved compartments from the number Y of free compartments for purposes of determining the number V of available compartments remaining in the parcel compartment facility. The exemplary method additionally comprises assigning at least some of the remaining available compartments V to a second user group B, if V>1 and transmitting a control command for a reservation of the compartments assigned to the second user group B from the data processing unit to the control unit of the parcel compartment facility. The exemplary method further comprises acquiring user identifications and / or mailing information through a user interface at the parcel compartment facility and associating a user and / or a mailpiece with the user groups A or B on the basis of the acquired user information and / or mailing information. The exemplary method also comprises controlling access to free compartments of the parcel compartment facility on the basis of the reservations made for the two user groups A and B and determining a point in time P by the control unit of the parcel compartment facility. The exemplary method additionally comprises canceling the reservations of compartments for the user groups A and B after the point in time P and releasing access to free compartments of the parcel compartment facility to all user groups.

The invention provides a public transport card passenger commuter OD (origin and destination) distribution estimation method based on APTS (advanced public transportation systems). The method includes collecting APTS data, obtaining station information where public transport passengers getting on according to association between public transport IC (intelligent card) data and intelligent scheduling system data, judging public transport commuters according to travel frequency of morning and evening peaks, and determining places of residence and places of work according to time and space characteristics of commuter traveling. The public transport card passenger commuter OD distribution estimation method has the advantages of high accuracy and strong operability, a novel manner for obtaining public transport commuter OD distribution rapidly and economically is provided, ratio of the commuters traveling by public transport can be increased, and the urban traffic congestion problem can be relived effectively.

The invention relates to an air bridge and an automatic abutting method therefor. The air bridge comprises an airplane connector, a lifting mechanism, a travelling mechanism and an automatic abutting device. The automatic abutting device comprises an image data acquisition unit, a preprocessing unit, a database, a visual identification and positioning unit, a motion control unit and a bridge control system. When an airplane parks at a parking position and the air bridge automatically abuts at an initial position, the automatic abutting device is started; image data of a hatch door of the airplane, included in the image data acquisition unit, is preprocessed; an image meeting the features of the hatch door of the airplane is recognized from the processed image data; information about the position of the airplane connector relative to the hatch door is calculated; travel control information is generated according to the information about the relative position; the relative position information and the travel control information are encoded and transmitted to the bridge control system; finally, the received information is decoded, the travel control information is executed, and the air bridge is driven to move until automatically abutting to the hatch door.

A control circuit is for an electric power plant including an asynchronous generator of an AC voltage, a motor to rotate a rotor of the asynchronous generator as a function of a first control signal of a developed motor torque, and a bank of capacitors coupled to the asynchronous generator and having a total capacitance varying as function of a second control signal. The control circuit may include a monitor circuit to monitor at least one parameter of the AC voltage, and a control signal generator circuit cooperating with the monitor circuit to generate the first and second control signals by soft-computing techniques both as a function of the frequency and of a representative value of an amplitude of the AC voltage to make the AC voltage have a desired amplitude and frequency.

The invention discloses a precision improvement calibrating method for a current vortex sensor, which is used for calibrating precision by finding an optimal linear range in which the current vortex sensor can meet requirements so that the current vortex sensor measures at the highest precision in the range meeting the requirements and the established mathematical models are simultaneously minimum. The invention has the advantages of convenient use, high stability and good economical efficiency and furthest utilizes the existing measuring range of the current vortex sensor on the basis of improving the precision of the sensor. A method in the greatest range simplifies the error correction process of the sensor and achieves the purpose of improving the measuring precision by using minimum mathematical models.

The invention discloses a camera calibration method based on an improved distortion model. The method comprises the following steps: according to the transformation relationship between a world coordinate system and an image coordinate system, establishing a camera calibration model; according to orthogonal property of a matrix, obtaining a constraint equation of internal parameters of a camera; approximately calculating an initial value through a linear solution method, and then, calculating a homography matrix through a gradient method; according to the calculated constraint equation and the homography matrix, calculating camera model parameters; combining Zhengyou Zhang and Heikkila calibration models, changing solving order of the two ends of a distortion model equation according to radial distortion and tangential distortion, and calculating the initial value through a linear least square method; and carrying out optimization solution on the camera parameters through a Levenberg-Marquardt algorithm to obtain optimal camera parameters. The method realizes camera calibration and has the advantages of high calibration precision and easy implementation.

The invention relates to a helicopter automatic inclinator spherical hinge bearing comprehensive fatigue testing machine which comprises a support, a base, an inner ring parallel mechanism, an outer ring parallel mechanism, a power transmission mechanism and a control system. The helicopter automatic inclinator spherical hinge bearing comprehensive fatigue testing machine is characterized in that the base is fixed on the support, stand columns are arranged on the same circumference of the base at intervals, an upper cover is arranged on top ends of the stand columns, a main shaft is arranged between the base and the upper cover, the inner ring parallel mechanism is composed of an inner ring upper platform, a joint bearing, a first twist preventing arm, and an electric power booster, the outer ring parallel mechanism is composed of an outer ring lower platform, a first bearing, a first gear, an outer ring upper platform, an adjustable pressure controller, and a second twist preventing arm, the power transmission mechanism comprises a motor and a second gear fixed on a motor shaft, the motor is fixed on the base, and the second gear is meshed with the first gear. The helicopter automatic inclinator spherical hinge bearing comprehensive fatigue testing machine has the advantages of being capable of realizing fatigue experimental tests on a ball hinge bearing, a joint bearing, a double-row contact bearing, and the like in a helicopter rotor system.

The invention discloses a digital closed loop optical fiber gyroscope with a double-interferometer system. The digital closed loop optical fiber gyroscope comprises a light source driver, a light source, a third beam splitter, a first angular speed sensing module, a second angular speed sensing module, an optical fiber ring and a logic circuit, wherein light emitted by the light source is divided into two beams of incident light after passing through the third beam splitter, and the two beams of incident light respectively enter the first angular speed sensing module and the second angular speed sensing module; the two modules uses the same optical fiber ring, so that two different interferometers are formed in the polarization maintaining optical fiber ring and respectively output signals; the logic circuit receives the signals and performs differential calculation to obtain speed information sensed by the interferometers. The digital closed loop optical fiber gyroscope disclosed by the invention controls a polarization state through a polarization beam splitting / combing device through the same polarization maintaining optical fiber ring, so that the two interferometers in different polarization states are formed in the optical fiber ring; the two polarization states are separated, so that the light-based double-polarization double-interferometer system is implemented, and the precision of the digital closed loop optical fiber gyroscope can be obviously improved, and the intensity noise of the light source is suppressed.

The invention provides a calibration system, a calibration method and a fluid spreading device. The calibration method is used for calibrating the position of a glue dispensing head, the glue clearingposition and the weighing position of the calibration system and used for automatic calibration adopted after a glue dispensing head device of the calibration system is replaced. The calibration method comprises the steps that S1, through cooperation between a calibration camera and the coordinate position of the glue dispensing head, the horizontal position of the glue dispensing head is calibrated; S2, a laser height measuring sensor and a tool setting gauge cooperate to calibrate the vertical position of the glue spreading head; S3, through cooperation between the glue dispensing head or the calibration camera and a glue clearing device, the glue clearing position is calibrated; S4, the glue head or the calibration camera cooperates with the weighting device so as to calibrate the weighing position; S5, after the step S1, the step S2, the step S3 and the step S4 are completed, automatic calibration is achieved after replacement of the glue dispensing head device. According to the calibration method of the calibration system, the precision of the set glue dispensing height can be effectively improved, and good glue dispensing is achieved.

The invention relates to the technical field of air conditioners, and discloses an air conditioner control method and an air conditioner. The control module of the air conditioner controls the opening of the communication module of the air conditioner, and an intelligent terminal is used to control the air conditioner to establish a connection with the Internet through the communication module; the intelligent terminal obtains its own positioning information and The positioning information is sent to the cloud server; the communication module is connected to the cloud server, and the cloud server sends the control parameters corresponding to the weather information at the geographic location of the smart terminal to the communication module; the control module controls the air conditioner according to the control parameters received by the communication module. Adjust the working method. Since the low-cost communication module is installed on the air conditioner in this application to replace the expensive positioning module and its peripheral circuits, the cost is the lowest, and a higher cost performance is achieved while achieving the same function. The built-in positioning device locates the position of the air conditioner, and the location information of the air conditioner is collected with high accuracy.

A rapid molding method based on an electrorheological fluid, and an apparatus thereof are provided. The electrorheological fluid is jetted to a deposition base station with electric field, the electrorheological fluid is rapidly cured through utilizing an electrorheological effect, and the electrorheological fluid deposits on the deposition base station layer by layer to construct a three dimensional entity; a liquid storage container, a driving pump and a nozzle are sequentially communicated through a pipeline to form an electrorheological fluid conveying path; two control lines are set by a computer, a first control line controls the flow of the driving pump, and a second control line controls the three dimension movement of the nozzle through a servo mechanism; and electrodes which comprise an anode and a cathode closely adhere to two sides of a model to be deposited on the deposition base station to provide the electric field required by the curing of the electrorheological fluid. The apparatus which utilizes the electrorheological effect of the electrorheological fluid and utilizes the electric field to replace a temperature control module and a constant temperature environment in traditional fusion jet rapid molding has the advantages of simple structure, substantial reduction of the cost and energy, and realization of micromation; and the method and the apparatus can be applied to fields of prosthesis models, industrial design, mechanical manufacturing, three dimensional scene display, entertainment and art, and the like.

The intelligent gas spring includes a casing, an inner cylinder with cylinder cap and piston to separate the space inside the casing into main gas chamber and subsidiary gas chamber communicated through an on-off gas channel, and a stroke valve installed on the inner cylinder cap to suit with the damping cylinder on the piston. The gas channel may be opened or closed accurately and timely based on the varying road condition so as to regulate the rigidity of the gas spring intelligently to suit for different road condition. The present invention has excellent shock absorbing performance to make the automobile possess high riding comfort and excellent operation stability, and may be installed widely in various kinds of automobile.

The invention belongs to the technical field of gyroscopes and relates to a magnetic shielding method used for a magnetic resonance gyroscope. The active-passive magnetic shielding method includes 1) a step of passive shielding, namely a step of setting a passive shielding layer at the outside of the magnetic resonance gyroscope, with the shielding layer being a high-magnetic-permeability material, and 2) a step of active compensation, namely a step of setting an active compensation device inside a passive shielding device and outside a sensitive structure of the magnetic resonance gyroscope, wherein the active compensation device comprises an atom magnetometer, a three-dimensional magnetic field coil and a current source. The technical problem to be overcome is a problem that magnetic shielding methods at present cannot meet efficient environment magnetic field shielding requirements for small-size magnetic resonance gyroscopes. The method improves magnetic shielding performance on the base of not increasing hardware components of the magnetic resonance gyroscope.

The invention discloses a multi-feature identification method based on a high-resolution remote sensing image and relates to the field of remote sensing image processing, in particular to a multi-feature recognition method based on a high-resolution remote sensing image. According to the identification method based on multiple features of the high-resolution remote sensing image, remote sensing multi-feature data serve as an input source of a neural network, multi-scale feature information of the remote sensing image is constructed, extracted and fused, an auxiliary loss function is added to improve the accuracy of a model, and the identification precision of the remote sensing image is improved. According to the invention, remote sensing image information can be better mined to improve the recognition capability of the deep convolutional network for the remote sensing image; an auxiliary loss function is set to assist the training of the network of the invention, so that the identification precision of the network can be improved; the network structure can extract and fuse different scale information of the remote sensing image, and can screen feature information beneficial to remote sensing image identification, so that the identification precision of the remote sensing image is improved; compared with a fusion method, the overall precision of remote sensing image identification can reach 1.4%.

The invention discloses a terahertz active imaging radar system phase compensation method. The method comprises the following steps: S1) opening an internal calibration channel; S2) obtaining phase information of a terahertz wave echo signal of the internal calibration channel; S3) extracting phase error of the terahertz wave echo signal of the internal calibration channel; S4) through a polynomial fitting phase correction function, obtaining monomial and nonlinear term coefficient values of the phase correction function; S5) opening a reception channel; S6) obtaining an intermediate frequency echo signal of the reception channel; S7) analyzing the intermediate frequency echo signal of the reception channel to obtain target distance information; and S8) according to the target distance information and the phase correction function in the step S4), calculating compensation phase, and finishing phase compensation of intermediate frequency echo signal data of the reception channel according to the calculation result of the compensation phase. The advantages are that compared with a conventional phase compensation method, the method is high in adaptation, and can overcome the defects of a conventional terahertz active imaging radar phase compensation method.

The invention provides an industrial fault analysis expert system based on a Knowledge Graph. The industrial fault analysis expert system based on the Knowledge Graph comprises the following steps that expert experience knowledge is obtained and preprocessed to eliminate anomalies and complement missing values; knowledge data fuzzification is carried out, and a knowledge graph is constructed in the field of industrial fault analysis by applying a semantic net technology and a graph calculation engine according to the knowledge data fuzzification. The simplification and high efficiency of a knowledge graph structure are ensured through a graph dynamic self-optimization process, and the calculation efficiency is improved; industrial faults are diagnosed and analyzed based on a fuzzy reasoning method, and data or equipment abnormity is efficiently and accurately judged.

The present invention provides a motor control device, which realizes desired high-accuracy advanced angle control of brush-less DC motor with simple and low-cost structure. In the motor control device, a phase adjusting circuit is provided, which is composed of a combined circuit of resistances (R1-5) and diodes (D1-4), and processes the speed instruction into voltage similar to fold lien of optimum phase angle control characteristic corresponding to speed of the brush-less DC motor to form phase angle signal, and by adjusting the combination of resistances (R1-5) and diodes (D1-4), the speed instruction is processed into voltage similar to fold lien of optimum phase angle control characteristic corresponding to speed of the brush-less DC motor to form phase angle signal of the voltage corresponding to the optimum phase angle control characteristic, and execute high-accuracy advanced angle control for phase of power supply of the brush-less DC motor according to the phase angle signal.

The invention relates to a digital signal processor (DSP)-based rotating machine vibration detection and protection system. The system mainly comprises a power module, a sensor power supply module, a sensor signal acquiring and conditioning module and a microprocessor microprogrammed control unit (MCU) module, wherein a DSP module is arranged between the sensor signal acquiring and conditioning module and the microprocessor MCU module and is used for processing a sampled signal; the microprocessor MCU module is used for determining a corresponding numerical value signal processing algorithm of the DSP module according to conditions of different sensors, control modes and the like; and the DSP module is used for transmitting processed data to the microprocessor MCU module through a host port interface (HPI). In the system, a DSP is used as a vibration signal operation central processing unit (CPU), so that vibration signals can be acquired at a high speed; and the DSP has high signal processing capability, so that calculation accuracy is improved, a state monitoring and protecting function can be quickly finished, and the operation load of an upper computer is reduced.

The invention relates to a method for controlling temperature of crude oil for emulsion of a rolling mill and a control device. The method comprises the steps of: arranging a heating device on the outer part of a crude oil tank; adopting a circulation heating pump arranged at the tail of the crude oil tank to transfer crude oil to a heat exchanger for heat exchange; simultaneously adopting a temperature controller on the crude oil tank to control the on and off of the heating device; and transferring crude oil to the top of the crude oil tank for outer circulation heating so as to keep the temperature of crude oil inside the crude oil tank at a preset value. A control device comprises the heating device consisting of the circulation heating pump and the heat exchanger, the temperature controller, a steam control valve, a steam trap and pipelines connecting the components, wherein the circulation heating pump is arranged at the tail of the crude oil tank, the heat exchanger is arranged on the side of the crude oil tank and the temperature controller is arranged on the crude oil tank. The invention has the advantages of good heating effect, equal crude oil temperature, high temperature-control property and precision, simple and convenient operation process, non-steam entering the crude oil and non-impact on crude oil quality.

The invention discloses a monitoring device and a method for predicting a tire burst, belonging to the technical field of automobile safety. The present invention replaces the pressure monitoring withthe height of the distance sensor at the point where the wheel meets the ground, and the height at which the joint for wheels and the ground to a distance sensor, wheel speed of wheels and tire temperature are taken as the predicted samples of tire burst, the obtained data are processed according to a certain algorithm, Height after application (img file= 'DDA0001806738120000011. TIF' wi= '82' he= '63' / ) Wheel speed (img file= 'DDA0001806738120000012. TIF 'wi=' 78 'he=' 63 ' / ) temperature (img file=' DDA0001806738120000013. TIF 'wi=' 71 'he=' 72 ' / ) determine that data processing module of each factor ratio weight algorithm by multi-factor fusion, you can find out exactly where the wheel of a flat tire is, or where the wheel of a flat tire is going to be. It can accurately and timely predict the risk of vehicle tire blowout, so as to avoid traffic accidents and protect the safety of personnel inside the vehicle.

The invention discloses a neuromorphic calculation circuit based on a multi-bit parallel binary synapse array. The neuromorphic calculation circuit comprises a neural axon module, the multi-bit parallel binary RRAM synapse array, a time division multiplexer, a plurality of integrators and a shared successive approximation analog-to-digital converter, wherein the neural axon module comprises two basic units, namely a time sequence scheduler and an adder, and the time sequence scheduler is used for arranging the time sequence of signals, so that input signals are sequentially input into a multi-bit parallel binary RRAM synapse array by adopting a dendritic priority strategy; the adder is used for expanding the array scale, and when the configured neural network input layer is greater than the input of one RRAM array, the adder is used for adding the calculation results of the plurality of arrays to obtain the output of the network layer. Compared with the current system, the method has the advantages of high precision and low power consumption, can be configured into most deep neural network applications, and is particularly suitable for being deployed in edge computing equipment with high energy consumption requirements.