78 results about "Metal sphere" patented technology

The invention discloses a phased array weather radar calibration method based on a generalized metal ball calibration theory. Comprising the following steps: in a microwave anechoic chamber, collecting two-dimensional antenna pattern data of a phased array weather radar in at least one working mode and pointing to a plurality of different beams; performing numerical integration on the two-dimensional antenna pattern data, calculating a combined beam main lobe solid angle of the transmitting antenna and the receiving antenna, and calculating an equivalent beam width product; calculating a calibration theoretical reflectivity factor of the metal ball based on the product of the theoretical radar scattering sectional area and the equivalent beam width of the metal ball; actual detection echo data of the phased array radar on the metal ball under different working modes and beam pointing is acquired, and an actual reflectivity factor is calculated; and comparing the actual reflectivity factor with the calibration theoretical reflectivity factor to complete calibration of the phased array weather radar. Aiming at the non-Gaussian working mode of the phased array weather radar, the reflectivity factor of the phased array weather radar can be quantitatively evaluated, and the radar detection performance is improved.

The invention discloses a weather radar metal ball calibration precision improving method, and belongs to the technical field of metal ball calibration, and the method comprises the following steps: carrying out the quantification of a background clutter error of a metal ball calibration position, and removing the background clutter error in the calibration process: constructing a metal ball stability model, and carrying out the calibration of the metal ball stability model; dynamic errors caused by swinging of the metal ball body are quantified and compensated; after the background clutter error is removed and the stability of the metal ball meets a certain condition, the deviation error of the metal ball from the beam center is quantized and compensated; and meanwhile, the cross-library phenomenon of the metal balls is identified, adjusted and compensated. According to the method, the calibration precision of the metal ball of the weather radar is improved.

The invention relates to a geometric parameter calculation and performance evaluation algorithm based on an integrated motif, which is applied to the integrated motif comprising a geometric parameter calculation module, a spatial resolution module, a contrast module, a uniformity module and a spatial accuracy module. Comprising the following steps: calculating geometric parameters of a CBCT system by using position information of a metal ball in a geometric parameter calculation module and known information; acquiring a line spread function of the metal wire by using position information and known information of the metal wire in the spatial resolution module, and then calculating the spatial resolution; sampling by using position information and known information of an annular insertion block in the contrast module; automatically selecting a center area and a peripheral area of a uniformity module to carry out gray value average value calculation to obtain uniformity information of the image; and the distance and the included angle between the positioning small holes are calculated by using the position information of the positioning small holes in the space accuracy module and known information. According to the invention, high-frequency, high-precision and low-cost performance evaluation requirements in the research and development process can be met.

The application belongs to the technical field of low-altitude aircraft detection, and particularly relates to a static electricity radar device for low-altitude aircraft detection and a working method thereof. The device comprises: a metal spherical shell configured to be grounded; an insulating material arranged on the surface of the metal spherical shell; a plurality of static electricity sensing electrodes embedded in the insulating material, the plurality of static electricity sensing electrodes being arrayed on the surface of the metal spherical shell, and the normal directions of the plurality of static electricity sensing electrodes converging at the geometric center of the metal spherical shell; and a signal processing module comprising a gating unit, a conditioning unit and a processing unit. The gating unit is connected to the static electricity sensing electrodes and is used for selecting specified static electricity sensing electrodes to be connected to subsequent circuits in time. The conditioning unit is configured to convert the induced charge signals into voltage signals and amplify and filter the voltage signals. The processing unit receives the digitized static electricity signals, and analyzes the spatial pose information of the low-altitude aircraft according to the signal intensity difference of different static electricity sensing electrodes. The spatial positioning of the low-altitude aircraft is realized by using the static electricity sensor array.

The invention discloses a preparation method of high-purity refractory metal spherical powder, which comprises the following steps: preparing high-purity refractory metal of which the initial shape is a block, cleaning and drying the refractory metal, smelting the refractory metal into alloy metal liquid, carrying out vacuum suction casting on the molten metal liquid, pouring a material into cooling water after suction casting is completed, and carrying out ingot casting and cooling, so as to obtain the high-purity refractory metal spherical powder. After the cast ingot is cooled, a metal bar is obtained, and finally the metal bar forms refractory alloy powder; the prepared powder is sprayed out through smelting atomization equipment, refractory alloy powder is put into a radio frequency induction plasma device, technological parameters are adjusted, and spherical powder is obtained; oxidation and impurity introduction of powder in the machining process can be effectively reduced through the radio frequency induction plasma device; when the refractory metal spherical powder is prepared, melting or spheroidizing can be achieved only when the metal powder reaches the specific temperature, the metal material can be rapidly and evenly heated through the high-frequency magnetic field effect of radio frequency induction heating, and temperature fluctuation is reduced.

The utility model provides a calibration auxiliary device applied to a millimeter wave ceilometer, and the device comprises an upper pedestal which is fixed at the bottom of the millimeter wave ceilometer; the lower base is supported on the ground and is rotationally connected with the upper base; the sliding rail is fixed on the upper surface of the lower base; the sliding block is arranged in the sliding rail and is in sliding connection with the sliding rail; one end of the supporting rod is hinged to the bottom surface of the upper base, and the other end is hinged to the sliding block; the screw is arranged in the sliding rail, one end of the screw is rotationally connected with the sliding rail, and the screw penetrates through the sliding block and is in threaded connection with the sliding block; one end of the universal joint is fixedly connected with the end part of the screw rod; and the handle is detachably connected to the other end of the universal joint. According to the technical scheme, by inclining the angle of the millimeter wave ceilometer, on one hand, the length of the rope between the unmanned aerial vehicle and the metal ball can be reduced, and because the unmanned aerial vehicle is located outside the beam irradiation range, interference sources are reduced, and the test precision is improved; meanwhile, the accuracy of position control of the metal ball is greatly improved, and the testing efficiency is improved.

This utility model relates to the technical field of rail vehicle components and discloses a uniformly stressed rubber stack for rail vehicles, including a support base. A central metal sphere is fixedly installed inside the support base. A first rubber layer is fixedly installed on the outer side of the central metal sphere. A first supporting sphere is fixedly installed on the outer side of the first rubber layer. A second rubber layer is fixedly installed on the outer side of the first supporting sphere. A second supporting sphere is fixedly installed on the outer side of the second rubber layer. This uniformly stressed rubber stack for rail vehicles has a cylindrical support plate with a first and second inclined surface, reducing stress concentration. Through a multi-layer metal reinforcement structure design, local stress concentration is reduced, dynamic load transfer efficiency is improved, and the longitudinal and lateral stiffness of the rubber stack is increased, resulting in uniform stress distribution, extended service life, longer replacement cycles, lower failure rates, and reduced maintenance costs.

The utility model relates to the technical field of simple harmonic motion analysis under the action of a magnetic field, in particular to a simple harmonic motion analysis device and equipment based on a torsional pendulum under a magnetic field condition, and the device comprises a magnetic field torsional pendulum mechanism, a data acquisition mechanism and a control mechanism, the magnetic field torsional pendulum mechanism comprises a torsional pendulum assembly and a magnetic field generation module, and a metal ball in the torsional pendulum assembly is located in a magnetic field generated by the magnetic field generation module. The data acquisition mechanism comprises an encoder and a photoelectric door, and the encoder is mounted on a rotating shaft of the metal ball and is in contact with the metal ball; the photoelectric door is arranged on a motion path of the metal ball, and when the encoder synchronously rotates along with the metal ball, the edge of a coded disc of the encoder passes through a detection area of the photoelectric door; and the control mechanism is connected with the encoder and the photoelectric door. According to the utility model, automatic data acquisition and processing can be realized, and the motion state of the pendulum ball can be accurately monitored in real time.

To provide a micro-metal sphere manufacturing apparatus capable of stably producing micro-metal spheres with high precision and small variations in sphere diameter. [Solution] The micro-metal ball manufacturing apparatus 1 has a crucible 20 for containing molten metal M and a cooling tower 30 connected vertically to the crucible 20. An orifice 40 is provided at the bottom 24 of the crucible 20, connecting the crucible 20 and the cooling tower 30. The crucible 20 has a pressurized gas supply means 70 for supplying pressurized gas G1. The micro-metal ball manufacturing apparatus 1 has an excitation rod 54 that extends from outside the crucible 20 through the inside of the molten metal M to just before the orifice 40, and a vibrator 53 that is positioned outside the crucible 20 and vibrates the excitation rod 54 in the axial direction. The cooling air blowing means 70 blows cooling air around the entire circumference of the exposed part of the vibrator 53.

The microchannel liquid cooling plate comprises a plate body with an internal cavity, a plurality of regularly arranged blade teeth are arranged in the internal cavity of the plate body, and a plurality of metal balls are filled in gaps between the adjacent blade teeth. The metal balls and the blade teeth are connected in a metallurgical bonding mode and form a disordered micro-channel network in the gaps. The design is reasonable and ingenious, on the basis of form relieved tooth blade teeth, disorderly-arranged metal ball filler is introduced and combined with the form relieved tooth blade teeth, a high-specific-surface-area and strong-disturbance three-dimensional random micro-channel network is constructed, and therefore the heat exchange efficiency is remarkably improved, meanwhile, the process is kept relatively simple, and the cost is controllable.

The invention provides a spacecraft based on a spherical solar cell array as a shell, the spacecraft comprises a spacecraft spherical shell, the spacecraft spherical shell comprises a metal spherical shell and solar cells arranged on the metal spherical shell, and heat pipes with heat transfer capability are uniformly distributed and attached on the inner side surface of the metal spherical shell. A polyimide film is attached to the surface of the idle outer side, without the solar cell, of the heat absorption area of the spherical shell of the spacecraft. The invention further provides a thermal control design method of the spacecraft based on the spherical solar cell array as the shell. Compared with the prior art, the spacecraft with the spherical solar cell array as the shell and the thermal control design method of the spacecraft have the advantages that the spacecraft with the spherical solar cell array as the shell serves as the basis, temperature equalization is conducted on the spherical solar cell array of the spacecraft through the high-heat-conduction heat pipes, and therefore the spherical solar cell array keeps a small temperature gradient.

The invention discloses a wafer packaging structure and a wafer packaging method.The wafer packaging structure comprises a cap and a wafer which are oppositely arranged, a device structure is arranged on the wafer, a sealing ring is arranged between the cap and the wafer, and therefore a sealing cavity is defined by a metal layer and an organic material layer in the cap, the sealing ring and the wafer; the metal layer in the cap comprises a first metal region and a plurality of second metal regions which are insulated from each other, the second metal regions are electrically connected with the device structure through metal bumps, and metal balls electrically connected with an external power supply are arranged on the second metal regions; therefore, the device structure obtains the electric energy of an external power supply through the metal bumps, the second metal regions and the metal balls, breaks through the existing MEMS wafer level packaging mode, optimizes the process flow, shortens the process time, reduces the cost, and improves the production efficiency. In addition, the metal protruding block is located in the sealing cavity and can support the cap structure, so that the cap structure is firm and stable.

A spherical designer electromagnetic surface plasmon open resonator is provided. The open resonator includes a resonator inner core and a resonator outer shell. The resonator inner core is located in an inner center of the resonator outer shell, and the resonator inner core and the resonator outer shell are coaxial. The disclosure provides a device that implements the superscattering function for incident waves in all incident directions and in all polarization directions, and a spherical open resonator is implemented. The scattering cross section of the disclosure can be more than five times greater than that of a metal sphere of the same size, and the operating frequency can be flexibly designed. By utilizing the characteristic that the scattering cross section of the spherical designer electromagnetic surface plasmon resonator is much greater than its own geometric cross section, the electromagnetic super-scattering device can be implemented.

The invention relates to the field of preparation of metal spherical powder, in particular to a preparation method of niobium alloy spherical powder, and a spherical powder preparation process including coarse powder recycling is constructed by integrating plasma rotating electrode powder preparation and induction plasma spheroidizing processes. The fine powder accounts for more than 99% of 15-53 [mu] m and can be directly used for 3D printing, and the coarse powder is more than or equal to 53 [mu] m; and carrying out hydrogenation, ball milling, secondary screening, induction plasma spheroidizing and vacuum dehydrogenation on the coarse powder, and mixing the coarse powder with the fine powder to obtain the final niobium alloy spherical powder. According to the technology, efficient preparation of the high-quality niobium alloy spherical powder is achieved, the proportion of the finished product 15-53-micron fine powder is larger than or equal to 96%, the fine powder yield is larger than or equal to 85%, the oxygen content is smaller than or equal to 250 ppm, the spheroidization rate is larger than or equal to 95%, and the technology is suitable for powder bed laser melting additive manufacturing and suitable for the fields of aerospace, nuclear power, military industry and the like.

The utility model provides a floating disc liquid drainage structure with a ball. The floating disc liquid drainage structure comprises an upper fixing plate, a lower fixing plate, a side wall, a limiting component and a metal hollow ball, the upper fixing plate is provided with a flow guide pipe, the lower fixing plate is provided with a backflow pipe, and the flow guide pipe extends into the backflow pipe; a side wall is arranged between the upper fixing plate and the lower fixing plate and located on the outer side of the backflow pipe. The upper end of the backflow pipe is open, the lower end of the backflow pipe is closed, and an opening is formed in the area, between the backflow pipe and the side wall, of the lower fixing plate; the metal hollow ball is located at the top opening of the flow guide pipe in a floating mode, the movement range of the metal hollow ball is limited through a limiting part, and the limiting part is fixedly installed on the upper fixing plate. Through the design of the annular cavity structure, the floating disc liquid drainage structure with the ball has a better liquid accumulation prevention effect, and is simple in structure and convenient to mount and dismount.

The application discloses a phased array weather radar calibration method based on generalized metal ball calibration theory. The method comprises the following steps: collecting two-dimensional antenna pattern data of a phased array weather radar under at least one working mode and multiple different beam directions in a microwave darkroom; performing numerical integration on the two-dimensional antenna pattern data, calculating a combined beam main lobe real solid angle of a transmitting antenna and a receiving antenna, and calculating an equivalent beam width product; calculating a calibration theory reflectivity factor of a metal ball based on a radar scattering cross section of the metal ball and the equivalent beam width product; acquiring actual detection echo data of the phased array radar on the metal ball under different working modes and beam directions, and calculating an actual reflectivity factor; and comparing the actual reflectivity factor with the calibration theory reflectivity factor, thereby completing calibration of the phased array weather radar. The application can quantitatively evaluate the reflectivity factor of the phased array weather radar in a non-Gaussian working mode, and improves radar detection performance.

The utility model discloses a portable gas concentration detection equipment, include: self -priming gas detector, gas hose, metal ball, universal pipe and by the hard pipe of detachable connection of multiple section constitution's hard gas guide pipe, one end of gas hose with the one end of hard gas guide pipe can respectively with the air inlet interface of self -priming gas detector of can detachable connection, the other end of gas hose is connected with the connector on metal ball, the other end of hard gas guide pipe is detachable connection with universal pipe, the metal ball is hollow, and one end with connector has several air inlet holes on it. The application has the beneficial effects that: after the universal pipe is connected with the gas hose, the universal pipe can be bent in any direction, and after bending, it can be inserted into the inside of the high-altitude turning space, the inside of the turning space is detected, and the practicability is improved.

The invention relates to the technical field of pneumatic conveying of powdery materials, and discloses a long-distance conveyor suitable for powdery raw materials, which comprises a conveying pipeline, the conveying pipeline is sequentially communicated with an air blower, at least one feeding bin and a collecting bin along the conveying direction, and each right-angle corner of the conveying pipeline is communicated with a protection mechanism. The protection mechanism comprises a right-angle bent pipe, a ball cavity cylinder and a backflow pipe. In the initial stage of conveying, the backflow pipe introduces part of airflow and trace materials of the discharging section into the ball cavity cylinder, the materials are promoted to gather towards the middle of the ball cavity cylinder, and a bridging structure is rapidly established at the positions of the metal balls in an auxiliary mode; along with continuous conveying, the powdery raw materials are gradually stacked at the bridging structure and completely fill the ball cavity cylinder, and a compact and stable material cushion layer is formed. The process does not depend on first abrasion of the bent pipe, but a protective layer can be actively formed at the initial stage of normal conveying, and follow-up high-speed powder is thoroughly isolated from the inner wall of the bent pipe.

The utility model relates to glass cover plate polishing and dust removing equipment which comprises a machine table, a box body is arranged at the top of the machine table, a movable seat is arranged in the box body, a vacuum adsorption mechanism is arranged at the top of the movable seat, a circle of arching part is arranged on the side wall of the box body in an outward protruding mode, and a circle of dust removing pipes are arranged in the arching part. Dust collection hoods are uniformly arranged on the dust removal pipe; a cover plate driven by a hydraulic rod is arranged at the top of the box body, a circular hole is formed in the middle of the cover plate, a circular plate is arranged in the circular hole, arc-shaped grooves are formed in the outer arc wall of the circular plate and the side wall of the circular hole in a surrounding mode, a plurality of metal balls are arranged in two sets of arc-shaped grooves, and the circular plate is sleeved with a gear ring. A gear meshed with the gear ring is arranged on the gear ring and driven by a motor I. A motor II is further arranged on the top of one side of the circular plate, and a circular polishing seat located on one side of the top of the movable seat is arranged on an output shaft of the motor II. The device is simple in structure and convenient to use.

The invention discloses and relates to a visual illusion demonstration device based on a graph-ski double circle, and belongs to an optical science popularization education instrument. A visual illusion demonstration device based on Figure and Stronus double circles comprises an exhibition stand, a track device, a magnet disc, a planetary gear device and a control panel. An audience controls the servo motor to rotate forwards or backwards through the control panel, the sun wheel is driven to rotate forwards or backwards, then the planet wheels are driven to rotate forwards or backwards, and the upper planet wheels are meshed with the gears to move anticlockwise along the upper inner gears. As the magnet disc is fixedly connected with the upper planet wheel, based on the Figuus bicircle theory, the circular magnet adsorbs the metal ball to do linear reciprocating motion along the groove track; when all the metal balls independently reciprocate in the respective groove tracks, a small circle formed by all the metal balls can form a clockwise or rolling visual illusion effect on the track disc. The scientific and technological exhibition hall demonstration device well solves the problem and makes up for the situation that a scientific and technological exhibition hall is lack of the demonstration device.

The invention discloses a terahertz frequency band unmanned aerial vehicle radar cross section (RCS) dynamic measurement method, and relates to the technical field of radar detection. A terahertz radar is used for transmitting electromagnetic waves and receiving echo signals reflected by a target, measurement data including an azimuth angle, a pitch angle, a distance and an amplitude are output, and missing value filling, abnormal value removal and smoothing processing are carried out on the data by adopting multiple algorithms. A correction model is established through measurement of a metal ball with a known RCS value, and an unmanned aerial vehicle RCS calculation result is corrected. And outputting a final unmanned aerial vehicle RCS value according to a radar formula in combination with the pre-processed data and the correction result. Compared with the prior art, a microwave darkroom with high cost is not needed, the terahertz radar is adopted to measure the outdoor dynamic unmanned aerial vehicle, the RCS measurement error is + / -2.2 dBsm, and periodic RCS fluctuation caused by rotation of a propeller can be captured. Compared with a static measurement result of a conventional method, data of the method is closer to an actual flight scene, and the accuracy of unmanned aerial vehicle detection probability estimation is remarkably improved.

The utility model provides a stable toy block connector structure which comprises a fixed block and a rotating block. The fixing block is a cylindrical shell, an annular closed channel is formed in the inner wall face of the opening side of the front end of the fixing block, and the electrode bar is installed at the axis position of the rear end. The rotating block is a shell formed by connecting a polygonal table body with a cylindrical shell, a round hole connector device is installed at the front end of the rotating block, and two round through holes are axially symmetrically formed in the edge of an opening at the rear end. A plug cap is installed on an opening of the cylindrical shell, an elastic clamping structure composed of a compression spring and metal balls at the two ends of the compression spring is embedded in the opening of the cylindrical shell, and the metal balls are embedded in a channel of the cylindrical shell to form rotatable connection. The fixing block can be formed by splicing a plurality of arc-shaped shell pieces in a surrounding mode and is reinforced through a hoop sleeve. Electrical connection and mechanical connection are formed in a connection mode of the inner ring and the outer ring, and the connector has the advantages of being flexible, stable and reliable.

The invention discloses a staged composite energy dissipation and shock absorption device capable of effectively reducing harmful deformation. The high-strength friction plate is composed of I-shaped steel, a rectangular friction plate, a sawtooth-shaped metal strip, a small gear, a large gear, a follow-up gear, a metal disc, a metal ball, a high-strength metal spring, T-shaped steel, a limiting baffle, a U-shaped high-strength metal plate, a low-yield-point metal cylinder, a high-strength metal cylinder, an arc-shaped friction plate, a round friction plate and the like. Under the action of an earthquake, the rectangular friction plates, the circular friction plates and the arc-shaped friction plates can dissipate energy through friction, the low-yield-point metal cylinders can dissipate energy through buckling, meanwhile, through the amplification effect of the gears, small translational motion of the structure can be converted into large rotation of the follow-up gears, and metal balls in the metal discs are driven to exert collision energy dissipation; therefore, harmful deformation of the structure is effectively reduced. Earthquake energy is dissipated through collision and buckling. In addition, the purpose of self-resetting can be achieved through the high-strength metal springs, and therefore post-earthquake residual deformation of the structure is reduced.

The invention discloses a large metal ball high-altitude falling experiment device, and relates to the technical field of metal ball detection experiments. Comprising a screw elevator, the screw elevator is obliquely arranged upwards from an inlet to an outlet, a slide way is arranged at an outlet of the screw elevator, a weight detection table is arranged at an outlet of the slide way, a sliding table is arranged on one side of the weight detection table in a sliding mode, and a limiting box is arranged above the sliding table in a sliding mode; one surface and the bottom surface, facing the weight detection table, of the limiting box are open, a limiting plate is rotationally arranged on one surface, facing the weight detection table, of the limiting box, and a blocking piece used for blocking the limiting plate from rotating outwards is further arranged on the limiting box; the driving device I is used for driving the sliding table to move; the driving device II is used for driving the limiting box to move; a plurality of falling pipelines with different diameters are sequentially arranged on one side of the weight detection table in the sliding direction of the sliding table, outlets of the falling pipelines are in butt joint with a backflow sliding way, and the outlet end of the backflow sliding way is in butt joint with an inlet of the screw elevator.

The utility model relates to the technical field of spherical metal part polishing, and discloses outer surface polishing equipment for spherical metal parts. The surface grinding equipment for the spherical metal part comprises a rectangular shell and a metal ball, a hemispherical shell which extends into the rectangular shell and is flush with the top of the rectangular shell is embedded in the top of the rectangular shell, the hemispherical shell is matched with the metal ball, and balls which are distributed in an annular array and movably connected with the hemispherical shell are embedded in the inner wall of the hemispherical shell; the device has the advantages that manpower participation is less, the grinding efficiency is greatly improved and the like, and solves the problems that in the prior art, when a spherical metal part is ground, the spherical metal part is clamped through a clamp, the grinding efficiency of the spherical metal part is greatly improved, and the grinding efficiency of the spherical metal part is greatly improved. The problem that the grinding efficiency is reduced due to the fact that manual adjustment is needed when a grinding surface is adjusted by manually operating a grinding instrument in the prior art is solved.

The application discloses a nano-lens array and a preparation method thereof. The preparation method of the nano-lens array comprises the following steps: coating photoresist on one surface of a substrate, shielding the photoresist by using a mask plate with a circular hole array, and then performing exposure treatment and development treatment on the photoresist, so as to obtain a photoresist film with a circular hole array on the substrate; plating a metal layer on the substrate with the photoresist film with the circular hole array; stripping the photoresist film from the substrate to obtain a metal disc array; performing annealing treatment on the substrate with the metal disc array, so that the metal disc array is melted and condensed into a metal sphere array, and the metal sphere array is used as an etching mask of the substrate; and performing dry etching on the substrate with the metal sphere array to obtain a nano-lens array. The nano-lens array prepared by the preparation method has low cost and simple operation.

The invention discloses a high-specific-gravity elevator balance compensation chain with built-in metal balls, and relates to the technical field of elevator balance compensation chains, the high-specific-gravity elevator balance compensation chain comprises metal chain links, the high-specific-gravity metal balls and a composite coating layer, and the metal chain links are flexible chain bodies formed by hinging multiple sections of arc-shaped chain links; a chain link cavity of each metal chain link is provided with a high-ratio metal ball, the high-ratio metal balls are tungsten alloy or lead-antimony alloy, the density of the tungsten alloy is 19-17.5 g / cm < 3 >, the density of the lead-antimony alloy is 13-11.3 g / cm < 3 >, and the surface of each metal chain link is covered with a composite coating layer. The composite coating layer comprises a high-molecular bonding layer and a metal ceramic coating from inside to outside, the high-molecular bonding layer is prepared from the following materials in percentage by weight: 60-80% of epoxy resin, 5-10% of graphene and 3-8% of a silane coupling agent, and the metal ceramic coating is a WC-10Co-4Cr layer prepared by oxyacetylene flame spraying. The layer thickness of the metal ceramic coating is 50-200 [mu] m, and the porosity of the metal ceramic coating is 1.2-1.5%.

This invention proposes an electric field sensing device and method for achieving three-dimensional electric field measurement using single-axis motion. The device is designed as a field mill structure, employing a motor-driven rotating rod that rotates a set of metal spherical shields distributed around the rotating rod, periodically blocking horizontal and vertical induction plate groups. The induction plate groups generate induced currents, which, after processing by a signal processing circuit, produce optical signals carrying electric field information. These signals are then connected to a host computer via optical fiber, allowing for visual online measurement of the three-dimensional electric field around the sensing device. This sensing device can simultaneously acquire electric fields from three directions in a Cartesian three-dimensional coordinate system. Through signal processing, optical fiber, and the host computer, the induced current signals are converted into visual signals representing the corresponding electric fields.

The utility model relates to the technical field of light and shadow art devices, and discloses a light and shadow art device with interactive lamplight, which comprises a hemispherical lower shell and an upper shell connected with the upper end of the lower shell, a metal ball capable of rolling is arranged in the lower shell, a vibration sensor and a bulb are arranged in the upper shell, and the bulb is connected with the upper end of the lower shell. And the vibration sensor outputs a vibration sensing result to adjust the brightness of the bulb. According to the utility model, the light and shadow art device is shaken through collision / striking of a person on the light and shadow art device, and then the vibration sensor senses the vibration when the light and shadow art device shakes and outputs a vibration sensing result to adjust the brightness of the bulb, so that the problems that most of the light and shadow art devices in the prior art are lack of an interaction function, and the brightness of the bulb is influenced can be solved. And the brightness cannot be automatically adjusted according to the collision / striking of people on the light and shadow art device.