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

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 relates to a high-precision high-acceleration low-frequency sinusoidal vibration system which comprises a rotating motor, a crank disc, a crankshaft, a horizontal rolling guide rail, a vertical rolling linear bearing, an upright post, a worktable, a balance weight and a position sensor, wherein a left guide post and a right guide post are arranged on a base; a left linear bearing and a right linear bearing are respectively arranged on the left guide post and the right guide post and can move up and down on the guide posts; two ends of a transverse beam are respectively connected with the left linear bearing and the right linear bearing; the horizontal rolling guide rail is fixedly connected to the transverse beam; a horizontal guide rail slide block can move from left to right on the horizontal rolling guide rail; and the upright post and the worktable are arranged on the transverse beam. According to the mechanical system, high-precision and high-acceleration low-frequency sinusoidal vibration can be realized, the defects of a centrifuge test are overcome, the flexibility of research trial is improved, the problems that a low-frequency section of the conventional vibration table is low in vibration amplitude and vibration frequency precision, the testing requirements of a high-precision inertia type instrument cannot be met and the like are solved, and a high-order error item coefficient of the inertia type instrument is tested.

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 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 relates to a method and device for precisely and controllably cutting graphene bands through a photo-catalytic oxidation function. The method is characterized by comprising the steps that firstly, graphene with a substrate is fixed to a two-dimensional micromotion platform driven by piezoelectric ceramic; secondly, Z-direction locating of a semiconductor probe is achieved through a magnetostriction mechanism with the help of a power controller; thirdly, an atomizer is used for atomizing auxiliary liquid, and the atomized auxiliary liquid is adsorbed to the surface of the semiconductor probe; and fourthly, an ultraviolet source emits ultraviolet light, the ultraviolet light irradiates the semiconductor probe through a light source transmission device after being focused through a collecting lens, and meanwhile through combination of ultraprecise motion of the two-dimensional micromotion platform in the direction X and the direction Y, the graphene bands with different two-dimensional patterns are cut. By means of the method and device, the problems of equipment corrosion, environment pollution, human body hurt and easy failing caused by using a traditional enhancement reagent and the problems of expensive equipment, complex operation conditions, control difficulty and the like caused by plasma and transition metal are solved.

The invention discloses an electric spindle supported by a five-degree-of-freedom alternating current six-pole active magnetic bearing, comprising a three-degree-of-freedom active magnetic bearing, ahigh-speed spindle motor, a two-degree-of-freedom active magnetic bearing and a rotating shaft. The rotating shaft, a rotor of the three-degree-of-freedom active magnetic bearing, the high-speed spindle motor and a rotor of the two-degree-of-freedom active magnetic bearing are fixedly connected in a pivoted manner. Both of the three-degree-of-freedom active magnetic bearing and the two-degree-of-freedom active magnetic bearing adopt three-phase inverter drive cotnrol, which significantly reduces the power consumption and cost of the power amplifier circuit. Both active magnetic bearings adoptsix-pole structure in the radial direction, which greatly reduces the nonlinearity and coupling relationship of levitation force characteristics and makes it easier to achieve accurate control. The invention realizes frictionless rotation between the motor and the rotating spindle, and has the advantages of no mechanical friction and wear, no noise, low power consumption, high speed, high precision and the like.

The invention relates to a numerical control machining method of a brake head. The numerical control machining method is characterized by comprising the following steps that a), a numerical control machining program of the brake head is input into a storage unit of a machine tool; b), X, Y and Z coordinates values of a machining original point in a workpiece coordinate system of the machine tool are set; c), according to a), the workpiece is machined into the brake head through the numerical control machining program in the middle, and then the contour deviation position and the deviation sizecaused by deformation in the machining process of the brake head are determined; and d), according to the machining track and the c), the contour deviation of the brake head in the reverse directionis corrected. According to the numerical control machining method, machining parameters are controllable, the stability is good, the machining track can be accurately adjusted, accurate control on themachining process can be easily realized, and the method is high in flexibility and wide in application range.

The invention provides a single-channel optical super-resolution imaging instrument which at least comprises an excitation light source module and an imaging, scanning and detecting module, wherein the excitation light source module comprises an optical laser, an acousto-optic modulator and an optical fiber coupler; the optical laser, the acousto-optic modulator and the optical fiber coupler are arranged in sequence; the optical axes of the optical laser, the acousto-optic modulator, a frequency scanning and selecting device and the optical fiber coupler are positioned on the same straight line; the imaging, scanning and detecting module comprises two lenses, a polarization beam splitter, a microscope objective, a sample stage and an imaging device; the optical axes of the lenses, the polarization beam splitter and the microscope objective are positioned on the same straight line and the optical axes of the imaging device and the polarization beam splitter are positioned on the same straight line. According to the invention, a single-channel frequency scanning, resonance excitation and polarization filtering combined method is adopted, so that the single-channel excitation super-resolution imaging of samples is realized. The single-channel optical super-resolution imaging instrument provided by the invention is simple in structure, obvious in effect and applied to the technical field of experiential and industrial super-resolution imaging.

The invention relates to a production method of a synthetic fibre, in particular to a combined efficient low-temperature trickle dynamic mixing device and a special method thereof, which mainly solve the technical problems that the prior art cannot apply on-line addition on a direct spinning production line and that a fusion method has high cost, high energy consumption and the like. The combined efficient low-temperature trickle dynamic mixing device comprises a framework, wherein the framework is provided with a sleeve component which is provided with a feeding component and a discharge outlet; the inside of the sleeve component is provided with an efficient mixing shaft component; the shaft body of the efficient mixing shaft component is provided with a blending mechanism; and the blending mechanism consists of a trickle mixing unit, a cutting unit and a low-temperature homogenizing unit which are arranged in order. The special method comprises the following steps: inletting a blended melt into an arc-shaped ring groove through the feeding component; introducing the blended melt into a pre-cutting unit to be cut after being trickled by a pre-trickling unit; introducing the blended melt into the blending mechanism to blend uniformly; and discharging a mixture from the discharging outlet.

The invention discloses a variable-frequency heating system for an electric heating plate. The variable-frequency heating system corresponds to the electric heating plate and comprises a controller and a variable-frequency heating device, wherein the variable-frequency heating device is connected with the controller; the controller comprises a control box body; a circuit board is arranged in the control box body and is provided with a power module, a single chip microcomputer, a rectifier, a filter, an inverter, a load circuit and a display module; the power module is connected with an external power supply and is connected with the single chip microcomputer and the rectifier; the single chip microcomputer is connected with the display module; the rectifier is connected with the filter; the filter is connected with the inverter; the inverter is connected with the load circuit; the load circuit is connected with the variable-frequency heating device; and the control box body is provided with a display screen. The variable-frequency heating system is reasonable in design; the performance of the power supply is improved; the heating cost is reduced; the heating volume is reduced; local heating can be finished; and the heating capacity and the heating temperature can be accurately controlled according to the demand quantity, so that waste of energy is reduced; the cost is reduced; and the electro-thermal conversion energy efficiency ratio is greatly improved.

The invention discloses a micro-flow control system, a normally-closed micro-valve and a control method. The normally-closed micro-valve comprises a micro-flow pipeline which is formed inside a base body; a valve element is arranged inside the micro-flow pipeline and is used for dividing the micro-flow pipeline into a first pipeline and a second pipeline; when the valve element is molten or gasified, the first pipeline communicates with the second pipeline; the valve element and the wall of the micro-flow pipeline are made from the same material; and a transparent material is arranged betweenthe outer wall surface of the base body and the valve element. The micro-valve disclosed by the invention is simple in structure, can solve the problem of integration of the micro-valve and the micro-flow control system and greatly reduces the machining difficulty because the valve element and the wall of the micro-flow pipeline are made from the same material, so the production cost is lowered.

The invention relates to a freezing device capable of realizing rapid condensation of a chocolate coating in an ice cream cone. The freezing device comprises a condensation box, a vacuum pipe, an integrated vaporization box and a liquid nitrogen storage tank. A plurality of spray pipes are arranged in the condensation box, and connecting plates connected with an ice cream cone production line are welded to the lower end faces of the two sides of the condensation box; and the spray pipe is opposite to the opening of the ice cream cone on the production line. The device can be directly installed on a mature ice cream cone production line, chocolate coatings can be rapidly condensed, the structure is simple and compact, and cold energy is fully utilized.

The invention discloses an intelligent dual-circulation incubator. The intelligent dual-circulation incubator comprises at least two incubation spaces, a temperature control system and stirring fan units. The number of the incubation spaces is even; each incubation space is composed of a bottom plate, an upper cover plate, two side walls and at least two doors, wherein the side walls are vertically and fixedly arranged between the bottom plate and the upper cover plate, and the doors are arranged at the two ends of every two incubation spaces and installed on the side walls. The stirring fan units correspond to the incubation spaces and are installed in the incubation spaces respectively; specifically, the stirring fan units correspond to the incubation spaces and installed in every two incubation spaces. Aiming at a single-stage high-volume incubator, the air flow path can be shortened, then the temperature gradient of the incubator is improved, the uniformity of a temperature field is optimized, the incubation rate and the healthy nestling rate of eggs are improved, and the incubator has an important significance in incubation and breeding.

The invention discloses a trans-dimension six-freedom-degree automatic butt joint system. The trans-dimension six-freedom-degree automatic butt joint system comprises a self-walking mechanism, a horizontal adjusting mechanism, a plane adjusting mechanism and a bottom plate. The horizontal adjusting mechanism is arranged on the self-walking mechanism. The plane adjusting mechanism is arranged on the horizontal adjusting mechanism. The bottom plate is arranged on the plane adjusting mechanism. The self-walking mechanism drives the horizontal adjusting mechanism and the plane adjusting mechanism to move. The horizontal adjusting mechanism adjusts the X-direction rotation, the Y-direction rotation and the Z-direction large-stroke movement. The plane adjusting mechanism adjusts the X-direction movement, the Y-direction movement and the Z-direction rotation, and the bottom plate is fixedly connected with one butt joint module. Thus, the self-walking mechanism, the horizontal adjusting mechanism and the plane adjusting mechanism are used for adjusting the posture of the butt joint modules so that long-distance transportation and accurate six-freedom-degree posture adjustment and butt joint of two butt joint modules in the space are achieved.