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4887results about How to "High adjustment accuracy" patented technology

Device and method for detecting micro defects on bright and clean surface of metal part based on machine vision

The invention relates to a device and method for detecting micro defects on the bright and clean surface of a metal part based on machine vision. The device comprises an imaging, positioning and adjusting mechanism and a processing unit, wherein the imaging, positioning and adjusting mechanism comprises a base plate, a guide rod, a fixed support, a sliding support, a stepping motor, a CCD (Charge Coupled Device) camera, a telecentric lens and parallel light sources, wherein the imaging and coaxial lighting of the CCD camera are primarily adjusted; an image collection card, an industrial personal computer, an equipment control card and an alarm are electrically connected in the processing unit and are used for collecting, transmitting, storing, processing, displaying and alarming image. The method comprises coaxial lighting adjustment and image processing, wherein coaxial lighting adjustment comprises the steps of triggering the equipment control card via software of the industrial personal computer to drive the stepping motor, and adjusting the rotating angles of the parallel light sources until the coaxial lighting condition is satisfied; and image processing comprises the steps of detecting defects on the internal surface of the detected part, respectively detecting large and small defects on the outer edge on the surface of the detected part, displaying the processing images in real time and judging the results.
Owner:安徽中科智能高技术有限责任公司

Optimized operation control method and system of distributed energy system

The invention discloses an optimized operation control method and system of a distributed energy system. The method include: S1, collecting environmental information and actual operation data of a unit so as to acquire a change rule of cold and hot load of a distributed energy station user with season and moment, and establishing a cold, hot and electric load prediction model; S2, optimizing the cold, hot and electric load prediction model on line by introducing real-time calibration factors and the actual operation data of the unit; S3, on the premise that the energy utilization efficiency is met, establishing a dynamic optimized load distribution model according to the dynamic requirements of the predicated cold, hot and electric load by taking a whole-plant economic benefit optimization as an objective, and outputting dynamic optimized load distribution results; S4, based on the whole-plant economic benefit optimization, establishing an optimal combination model according to the dynamic optimized load distribution results, and outputting a unit operation optimization command. High-precision load prediction information can be acquired, a corresponding optimization command is formed, and online optimization control is performed on the load dynamics and unit operation.
Owner:CHINA HUADIAN SCI & TECH INST

Roundness/cylindricality measurement workbench capable of automatically regulating center and inclination

InactiveCN102102986AImprove adjustment efficiencyRealize the function of automatic centering and tiltingMeasurement devicesEngineeringLinear motor
The invention relates to a roundness/cylindricality measurement workbench capable of automatically regulating center and inclination, which comprises a pedestal fixedly connected with a power shaft, an operating platform for placing a measured workpiece, three support frames, a sensor for measuring the eccentricity of the measured workpiece, and a control computer for receiving an output signal of the sensor and regulating the space position of the operating platform. The output signal of the sensor is transmitted to the control computer; the support frames comprise two telescopic support frames and a fixed support frame, the upper ends of the telescopic support frames are in spherical contact with the operating platform, the lower parts of the telescopic support frames are connected with a Z-axis linear motor, the Z-axis linear motor is fixed on the pedestal, the upper end of the fixed support frame is connected with the operating platform through a Hooke hinge assembly, and the lower part of the fixed support frame is connected with a sliding block assembly; the sliding block assembly is connected with an X-axis linear motor and a Y-axis linear motor respectively; and the X-axis linear motor and the Y-axis linear motor are fixed on the pedestal. The workbench has high regulating efficiency.
Owner:西安威而信精密仪器有限公司

Image display apparatus and image display method

An image display apparatus and an image display method, by which a desired image formation state on a retina can be constantly maintained, are provided. Thus, the image display apparatus of the present invention includes a laser light source for emitting laser light; a focus position adjustment section for adjusting a focus position, of the laser light by adjusting a spread angle of the laser light emitted by the laser light source; a scanning section for scanning a predetermined to-be-scanned area by using the laser light adjusted by the focus position adjustment section as scanning light; a light deflection section disposed at the predetermined to-be-scanned area for leading the scanning light to a cornea of the user; a light detection section disposed at a position where the light detection section has an optically conjugate relation with a surface of the cornea through the light deflection section, for detecting a part the scanning light reflected on the surface of the cornea and generating a detection signal; and a control section for controlling the laser light source, the focus position adjustment section, and the scanning section, The control section controls the focus position adjustment section to adjust the focus position of the laser light such that the detection signal generated by the light detection section agrees with an initial setting signal that is set in advance by the light detection section during an initial setting operation.
Owner:PANASONIC CORP

System for automatically controlling opening degree of automobile window

A system for automatically controlling the opening degree of an automobile window is used or automatically regulating the opening degree of the automobile window so as to control wind dryness when an automobile runs with the automobile window opened. The control system comprises a rainfall detection unit, an automobile speed detection unit, a unit for detecting the opening degree of the automobile window, an automobile window controller, an automobile window lifting executing unit and the automobile window, wherein the rainfall detection unit is used for detecting information of rainfall outside the automobile, the automobile speed detection unit is used for detecting the speed information of the automobile, the unit for detecting the opening degree of the automobile window is used for detecting the current opening degree information of the automobile window, the automobile window controller is used for receiving the rainfall information, the automobile speed information and the current opening degree information of the automobile window, the target opening degree of the automobile window is obtained according to the rainfall information and the automobile speed information, and the lifting control information of the automobile window is output to the automobile window lifting executing unit after the target opening degree of the automobile window is compared with the current opening degree information of the automobile window; the automobile window lifting executing unit automatically lifts the automobile window up and down according to the lifting control information of the automobile window, and the automobile window can be lifted to the target opening degree of the automobile window.
Owner:山西吉利汽车部件有限公司

Fuzzy proportion integration differentiation (PID) control method and device for industrial environment high-precision air conditioner

The invention discloses a fuzzy proportion integration differentiation (PID) control method and a fuzzy PID control method device for an industrial environment high-precision air conditioner. The method comprises the following steps of: selecting an input quantity of a fuzzy PID controller as a deviation e between an expected value and an actual output and a deviation change rate ec, and establishing a bivariate continuous function relation between parameters Kp, Ki and Kd and the absolute value of the deviation and the absolute value of the deviation change, wherein output quantities are the correction quantities delta Kp, delta Ki and delta Kd of the PID parameters; and determining a fuzzy relation between the three PID parameters and the deviation e and the deviation change rate ec, continuously detecting e and ec in operation, adjusting the three parameters on line according to a fuzzy control theory to obtain adjusted Kp, Ki and Kd, and inputting Kp, Ki and Kd into the PID controller. The control device comprises a fuzzy control circuit on a circuit board, wherein a self-setting mechanism circuit for setting the parameters on line is also arranged on the fuzzy control circuit. The precision of the temperature, humidity and pressure difference control of the industrial environment high-precision air conditioner is improved by introducing the fuzzy control into the conventional PID controller and comprehensively using the characteristics of the conventional PID controller and the fuzzy controller.
Owner:XIAN XIYI INTELLIGENT TECH

Active-disturbance-rejection control method and system for speed regulation system of permanent-magnet synchronous motor

The embodiment of the invention discloses an active-disturbance-rejection control method and system for a speed regulation system of a permanent-magnet synchronous motor. The active-disturbance-rejection control method comprises the steps of acquiring a rotor angular speed and a torque current of the speed regulation system of the permanent-magnet synchronous motor; processing the rotor angular speed and the torque current by employing an active-disturbance-rejection model which is built in advance and is adaptive to disturbance to obtain a control output signal; performing rotational speed control on the speed regulation system of the permanent-magnet synchronous motor according to the control output signal, wherein the active-disturbance-rejection model is built according to a first-order linear active-disturbance-rejection control sub-model, a rotational inertia identification sub-model and a load torque observation sub-model, the rotational inertia identification sub-model is built according to a Landau identification algorithm, and the load torque observation sub-model is built according to an expansion state observer; and adjusting control gain b0 of the system according to the identified rotational inertia and a calculation relation b0=Kt / J. According to the active-disturbance-rejection control method disclosed by the embodiment of the invention, the adjustment accuracy of the control grain b0 is improved during the application process, and the anti-interference capability of the speed regulation system of the permanent-magnet synchronous motor is improved.
Owner:GUANGDONG UNIV OF TECH

Self-adapting real-time regulating method for linear array remote sensing CCD camera dynamic range

ActiveCN101588515ASolve difficult problems that cannot be predicted from the entire imageIncrease or decrease exposure timeTelevision system detailsColor television detailsProperty valueLimit value
A self-adapting real-time regulating method for the linear array remote sensing CCD camera dynamic range, includes the steps: (1)setting the statistical property values of the image data; (2)receiving the image data line by line and removing the noise spot; (3)predicting for the next line of image data by utilizing a attenuation factor; (4)calculating each statistical property value of the predicted image data; (5) if the calculated variance being smaller than the variance threshold value, keeping the linear array CCD integral time constant, otherwise, (6)if the calculated average value being more than the average value upper limit value, decreasing the linear array CCD integral time; if the average value being smaller than the average value lower limit value, increasing the linear array CCD integral time; if the average value being between the average value upper limit value and the average value lower limit value, transferring the step (7), (7) if the difference of the calculated grey scale maximum value to the calculated grey scale minimal value being smaller than the grey scale threshold value, increasing the linear array CCD integral time, otherwise keeping the linear array integral time constant. The method of the invention has high modulation accuracy and good real time, and is beneficial for the realization on the present remote sensing linear array CCD camera.
Owner:BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH

Control device and control method of air conditioner compressor and variable-frequency air conditioner

The invention provides a control device of an air conditioner compressor. The control device comprises a main circuit unit and a weak-magnetic closed-loop regulating circuit, wherein the weak-magnetic closed-loop regulating circuit acquires working data information of the compressor from the main circuit unit, performs analysis and computation according to the acquired information, and supplies a control signal to a contravariant circuit of the main circuit unit so as to control the working voltage and working frequency of the compressor. The invention also provides a variable-frequency air conditioner with the control device of the air conditioner compressor. The invention further provides a control method of the air conditioner compressor. The control method comprises the following steps of: supplying power to the compressor by the main circuit unit; acquiring the working data information of the compressor from the main circuit unit by using the weak-magnetic closed-loop regulating circuit; performing analysis and computation according to the acquired information; and supplying the control signal to the contravariant circuit so as to control the working voltage and working frequency of the compressor. A power factor correction (PFC) circuit is matched with the weak-magnetic closed-loop regulating circuit to realize the high-efficiency and stable running of the compressor in a high-frequency area and a low-frequency area.
Owner:HAIER GRP CORP +1

Inverter device for asynchronous motor with low voltage ride-through capability

The invention discloses an asynchronous motor frequency converter device with low-voltage ride through capability. An alternating-direct-alternating mode is adopted for a frequency converter, namely, firstly converting a working frequency alternating power supply into a direct current power supply by a rectifier; and then converting the direct current power supply into an alternating power supplywith controllable voltage and frequency through an inversion link and providing the alternating power supply to an asynchronous motor. A diode rectification module in the inner part is switched in after the working frequency alternating power supply is switched in the frequency converter; the alternating current is converted into direct current; the output of a rectifier bridge is switched into aBOOST module; the output of the BOOST module is switched into the input of a DC/AC (direct current/alternating current) inverter module; and the output of the inverter module, serving as an alternating current supply, is directly supplied to the asynchronous motor. Under the normal condition, the BOOST module is not started, when the drop of the power grid voltage is detected, the BOOST module starts automatically, sufficient direct current voltage sources for the inversion link are ensured, and the stable operation of the asynchronous motor is ensured.
Owner:NORTHEAST CHINA GRID +5

High-precision pose adjusting device for spliced grating

InactiveCN102156340ASolving Kinematic Coupling IssuesCompact structureMountingsIn planeGrating
The invention discloses a high-precision pose adjusting device for a spliced grating, and relates to a high-precision pose adjusting device for a grating set. The device solves the problem that the high-precision grating pose adjusting device cannot realize precise grating adjustment of multiple degrees of freedom. A pitch adjusting unit is driven by a pitch adjusting micro driver to drive a pitch adjusting right guide rail sliding block to slide on a corresponding guide rail so as to realize directional independent grating adjustment; a deflection adjusting unit is driven by a deflection adjusting micro driver to drive a deflection adjusting framework and front and rear deflection guide rail sliding blocks to slide on the corresponding guide rails so as to realize directional independent grating adjustment; an in-plane adjusting unit is driven by an in-plane adjusting micro driver to drive an in-plane adjusting front and rear guide rail sliding blocks to slide on the corresponding guide rails so as to realize independent grating adjustment; and a linear adjusting unit is driven by a linear adjusting micro driver to drive a linear adjusting framework and left and right linear guide rail sliding blocks to slide on the corresponding guide rails so as to realize directional independent grating adjustment. The device is used for high-precision pose adjustment of the spliced grating set.
Owner:HARBIN INST OF TECH
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