37results about How to "Easy to achieve precise control" patented technology

The invention provides a zoom lens system, which comprises a zooming unit, a compensating unit and an imaging unit arranged on a same optical axis in turn, a driving transmission mechanism and a micro-processing control unit, wherein the driving transmission mechanism comprises a zooming stepping motor and a compensating stepping motor. The zooming unit is arranged on an output shaft of the zooming stepping motor through a driving piece; the compensating unit is arranged on an output shaft of the compensating stepping motor through the driving piece; and the micro-processing control unit adjusts the distance between the compensating unit driven by the compensating stepping motor and the imaging unit according to the distance changes between the zooming unit driven by the zooming stepping motor and the imaging unit. The zoom lens system has the advantages of compact structure, small volume, simple manufacturing, low cost, economization and portability.

The invention provides a satellite attitude controlled ground full-physical simulation intelligent control system, comprising a pressure regulating valve, a pressure sensor, a spirit level, a weighing sensor and a controller, wherein the control end of the pressure regulating valve and the output end of the pressure sensor are connected with the controller, and the spirit level and the output end of the weighing sensor are connected with the controller; the spirit level measures the levelness of a base and outputs data to the controller, and the weighing sensor measures the weight of a test bed in real time and outputs data to the controller; based on the thought of fussy intelligent control, a dependent variable is selected for establishing a system model, the controller enabling the system to be asymptotically stable is designed according to the Lyapunov stability analysis theory, the conservatism of the system design is lower by adopting the thought of piecewise linearization, and the description rules of the controlled object and the controller are not limited so as to improve the flexibility of the system design. The system is simple in principle and convenient to maintain.

The invention provides an air humidifier. The air humidifier comprises a humidifying device, a left supporting table, a right supporting table and a control element, the humidifying device comprises abase shell, an arc-shaped groove is formed in the top face of the base shell, the left supporting table and the right supporting table are fixedly arranged on the positions, located on the two sidesof the arc-shaped groove, of the top face of the base shell respectively, the control element is installed on one side, close to the right supporting table, of the base shell, an annular multi-stationwet spraying device capable of controlling and blocking air spraying is arranged at position, between the left supporting table and the right supporting table, of the top of the base shell. Accordingto the air humidifier, the moisture spraying stations are uniform, moisture can be emitted more rapidly through rotation, the spraying range is comprehensive, the humidification of the surrounding environment is effectively improved, the humidification uniformity is good, and therefore accurate control over air humidity can be achieved conveniently; and meanwhile, compared with traditional fixedinstallation of an air outlet part, the disinfection treatment difficulty is simplified through convenient disassembly of the wet spraying device, resistance caused by later disinfection is reduced, maintenance by a user is facilitated, and the use safety is improved.

The invention discloses propeller type surface contour error measurement instrument and method. The propeller type surface contour error measurement instrument is characterized in that a gantry structure is adopted, a left upright, a right upright and a top cross beam are arranged on a base, and a revolving spindle is arranged on a cross beam; the lower end of the revolving spindle is horizontally and fixedly connected with a measuring arm; a linear guiderail is arranged on the bottom surface of the measuring arm along the radial direction of the revolving plane of the measuring arm, a working platform capable of doing linear movement along the linear guiderail is arranged on the linear guiderail, and a displacement sensor is arranged on the working platform; and a Y-direction working platform and an X-direction working platform are arranged on the base in an overlapping, and the blade of a detected propeller is arranged in a positioning groove at the top surface of the X-direction working platform. The measuring device and the measuring method are established by adopting a cylindrical coordinate system according to the axial symmetry structure characteristics of the propeller blade. The measuring device and the measuring method are fast in data acquisition, have no objective errors of an operator, and are simple in follow-up error processing and analysis, and can be used for precision measurement on size parameters and geometric error parameters of large revolving parts.

The invention discloses an eccentric mechanism used on a working table of a vertical grinder, which comprises a working table, wherein a rotating shaft is installed on the working table, a bearing is assembled on the rotating shaft, an eccentric rotary table is installed on the working table and matched with a bearing outer ring, a worm gear is installed in the eccentric rotary table, a worm is assembled on the working table and meshed with the worm gear, and a disc spring is installed in a circular arc shaped groove of the eccentric rotary table; and the disc spring and the eccentric rotary table are connected together with the working table through screws. As the worm gear and worm drive mode is adopted, the accurate control of eccentricity is easy to realize; the rotating shaft is supported through a preloaded bearing during the assembly, and not only the high rotation accuracy of the eccentric rotary table is ensured, but also zero clearance in the rotating shaft of the eccentric rotary table is ensured, so that the stability and the accuracy in eccentric adjustment are ensured; and as the eccentric rotary table is fixed on the working table through the preloaded bearing and the disc spring, the eccentricity during the machining process is more convenient to adjust.

The invention discloses an aluminum and aluminum alloy spiral tube molding welding device. The aluminum and aluminum alloy spiral tube molding welding device is characterized by mainly comprising a spiral tube molding device fixedly installed at one end of a machine frame and a stirring friction welding device fixedly installed at the other end of the machine frame. The stirring friction welding device mainly comprises a high-speed motor, a stirring head connected to an output shaft of the high-speed motor and comprising a stirring needle and two shaft shoulders and at least two sets of rotary rollers arranged on the stirring friction welding device in a rotary mode. The aluminum and aluminum alloy spiral tube molding welding device is wide in adaptation, high in efficiency and capable of satisfying welding production of aluminum and aluminum alloy spiral welding tubes of various types.

The invention relates to a blade-type hydraulic transformer controlled by a motor, which comprises a shell, a rotating shaft, a left end cover, a valve plate, stators, rotators, a right end cover, a gear, a wedge-shaped plate, an impeller, a motor and the like. The blade-type hydraulic transformer is characterized in that centers of one set of rotators and the stator are fixed and superposed, thecenters of the other rotators and the stator are all fixed, and if the centers of the rotators and the stators are not superposed, the impeller is radially arranged along the rotators; one rotator isin matched connection with a left half shaft of the rotating shaft through splines, while the other rotator is in matched connection with a right half shaft of the rotating shaft through flat keys; the excircle of one stator is manufactured into a gear shape by taking a long-radius arc center as the center in the range of 150 degrees and form a gear driving pair with the gear, and the outer surface of the other stator is in matched contact with the right lateral surface of the wedge-shaped plate; and the valve plate is arranged on the rotating shaft and tightly pressed on the left lateral surfaces and the right lateral surfaces of the stators, the left end of the rotating shaft is arranged on the valve plate on the left side, the right end of the rotating shaft is arranged on the right end cover, and the left end cover and the right end cover are fixed on the shell through bolts.

The invention discloses a numerical control whirlwind milling method for middle-convex and varying ellipse pistons. The method comprises the following steps of inputting parameters: the design size and the technical requirements of a workpiece are input into a numerical control system; selecting a cutting tool and calculating the tool path data via the numerical control system according to the input parameters in step one to determine the linkage tool path data of C, Z and X axes of a machining tool; checking the tool path data via a simulation module; clamping and positioning; machining, starting a numerical control machining procedure, using a motor to drive a cutter head to revolve at high speed, and simultaneously controlling the spindle of the machine tool to drive the workpiece for C axis movement; controlling the cutter head for Z axis and X axis movement, and obtaining the outer surface of the piston through the linkage machining of C, X and Y axes. The method adopts the whirlwind milling process to machine the middle-convex and varying ellipse piston; the machine tool has the advantages of high movement accuracy and good dynamic stability. The method is easy to realize the accurate control to the machining process, and does not require corresponding high-frequency actuating mechanisms such as a linear motor, a magnetostrictive actuator and the like; therefore, the equipment cost is reduced.

The invention discloses a design method for a diffusing section of a narrow-slit spray pipe of a lateral-force engine. According to the design method for the diffusing section of the narrow-slit spray pipe of the lateral-force engine provided by the invention, transition from a circular inlet to a rectangular outlet with a large length-width ratio is realized through rectangular smoothing.

The invention discloses a preparation method of carbon-coated cobalt metal nano-particles, which relates to a gaseous compound decomposition-based chemical plating by which reaction product of surface material is not preserved in a plating layer and only carbon is deposited, and is a method for decomposing ethyne and synthesizing carbon-coated cobalt metal nano-particles on potassium chloride carrier by means of chemical vapor deposition. The preparation method comprises the following steps: firstly, preparing cobalt-potassium chloride catalyst, then, synthesizing carbon-coated cobalt metal nano-particles, and finally, performing purification to obtain the carbon-coated cobalt metal nano-particles with purity of 95-99%. The preparation method overcomes the defects that the carbon-coated metal nano-particles synthesized by the existing technology have low purity, poor performance and low yield, and contains overmuch impurities, and the impurities are not easy to remove.

The invention discloses a difunctional vane type hydraulic transformer controlled by a motor, comprising a housing, a rotation axis, a left end cap, a port plate, stators, rotors, a right end cap, a gear, a vane, a motor, etc. The invention is characterized in that the centers of the rotor and the center of the stator are fixed and coincident, and the vane is arranged along the radial direction of the rotor; one rotor is connected with the left half axis of the rotation axis in a matching mode by a spline, and the other rotor is connected with the right half axis of the rotation axis in a matching mode by a spline; the outer ring of one stator is made into a gear form by taking the major radius arc center as the center and ranging within 150 degrees, and one stator and the gear form a gear transmission pair; the gear is installed on the output axis of the motor, the motor is arranged on the housing, and the port plate is arranged on the rotation axis and is tightly pressed on the leftside surface and the right side surface of the rotor; and the left end cap and the right end cap are fixed on the housing via bolts. The invention has the beneficial effect that the invention can adjust the voltage of a constant-voltage network system to any value within induced pressure variation range in the way of no throttle loss, and can be used in medium-voltage hydraulic systems and high-voltage hydraulic systems.