165results about How to "Achieve size" patented technology

The invention relates to an infrared dynamic triangular target simulator, belonging to the technical field of infrared simulation. The simulator comprises a vertically-arranged triangular target assembly, a beam combiner, a horizontally-arranged round interference assembly and a collimation projecting lens, wherein the triangular target assembly is used for generating a triangular target with continuously variable size, light intensity and gesture; the round interface assembly is used for generating a round interface with continuously variable size, light intensity and position; and the triangular target and the round interface are respectively reflected and transmitted by the beam combiner and then projected to a tested infrared imaging guide head through the collimation projecting lens in parallel beams. According to the invention, the triangular target is used for simulating a marauding aircraft or missile, the round interface is used for simulating baits released by the aircraft or missile, not only the fidelity problem of the target simulator for simulation is solved, but also the simulation test evaluation precision of dynamic tracking and anti-jamming property of the infrared imaging guide head is improved.

A compact wireless security sensor having a magnetically operated plunger switch. The compact nature of the sensor of the present invention makes it ideal for being substantially concealing into a door frame or window as part of a wireless security system. The sensor unit includes a housing having an inner end, an outer end, and a magnet positioned within a moveable plunger, and an antenna, preferably a flexible wire antenna. The housing further contains a sensor switch, a microprocessor with a PCB, a wireless transmitter, such as an RF transmitter, and a power source, such as a small coin cell battery, for emitting signals to a master station or controller when the plunger switch is depressed and activates the internal sensor switch.

The invention discloses a flexible MEMS resistance-reducing skin and a manufacturing method thereof used for reducing skin friction resistance during the advancing of on-water or underwater vehicles, which employs micro-fine resident bubbles to reduce resistance and belongs to the fields of micro-machinery and fluid dynamics. The upper surface of the skin is a surface layer coated with micro-pit arrays and processed by surface soakage; electrolytic anodes and cathodes of comb-shaped micro-fine planar metal, which are attached on an insulating layer, are arranged at the bottom of the micro-pits; a flexible substrate is positioned below the insulating layer; wire leading terminals for electrodes are arranged on the lower surface of the skin; and both the surface layer and the substrate are made by flexible materials. The overall thickness of the resistance reducing skin is at sub-millimeter level, and the skin is in the status of flexible film. The manufacturing method is an MEMS micro machining technique compatible with the flexible MEMS technology. The flexible MEMS resistance-reducing skin is coated on the outer surfaces of the on-water or underwater vehicles, with power thereof supplied by the on-water or under-water vehicles. Micro-bubbles stably residing in the micro-pits are formed by water electrolysis reaction to coat most parts of the surfaces of the on-water or under-water vehicles, thus realizing the function of reducing skin friction resistance.

The invention relates to the nano caliper measurement technology of an AFM and discloses a nano caliper based on a double-probe AFM and a method for measuring the key dimension of a micro-nano structure through the nano caliper. The nano caliper based on the double-probe AFM and the method for measuring the key dimension of the micro-nano structure through the nano caliper aim to solve the problem that relevant key dimension measurement of two adjacent or opposite side walls to be measured is difficult to achieve through a traditional AFM. Based on the principle of the double-probe AFM, two rotary probe frames are designed, so that any angle ranging from -90 degrees to 90 degrees is formed between two probes and the bottom face, and when the two probes are the same in rotation angle and are opposite in direction, the nano caliper is formed, the surfaces of the two adjacent or opposite side walls can be scanned, and the key dimension of the micro-nano structure can be obtained according to scanning data. On the premise of not destroying samples, the adjacent and opposite areas of the surfaces of the two side walls are scanned to form an image, and the key dimension of the samples is obtained according to the scanning data. The nano caliper based on the double-probe AFM and the method for measuring the key dimension of the micro-nano structure through the nano caliper are applicable to measurement of the key dimension of micro-nano devices and can be applied to micro-nano manufacturing, testing and micro-nano operating fields.

The invention relates to an automatic fruit sorting system. The automatic fruit sorting system comprises a stander, wherein a conveying device is mounted on the stander, a dividing mechanism is arranged on the conveying device, a color distinguishing device and a main control device are mounted on the stander, and one side of the conveying device is connected with a collection tank through a guiding mechanism. According to the automatic fruit sorting system, the classification on the sizes and colors of fruits is realized by virtue of a PLC (Programmable Logic Controller) in a machine vision manner, the labor intensity of the manual fruit sorting is reduced, and the sorting efficiency is increased.

The invention relates to a method for measuring steel rail appearance geometric dimension and surface quality and a device thereof. Three sets of laser devices, a total of eight two-dimensional laser sensors, are adopted to acquire steel rail cross section contour data, data fusion is performed by computer software, all cross sections are spliced and the three-dimensional contour of a steel rail is acquired. Each cross section contour of the steel rail is automatically analyzed, the appearance geometric dimension of the steel rail is detected, steel rail surface quality is detected and detection results are uploaded to a welded rail production and management system so that automatic rail distribution and steel rail information recording can be realized. The detection results are displayed in real time, and three-dimensional contour pictures of surface quality with defects are recorded. The detection results are displayed in real time, and real-time sound-light alarm is performed when the detection results exceed standard values. The steel rail appearance geometric dimension and surface quality can be effectively detected by the method so that utilization rate of the steel rail can be greatly enhanced and safety hidden trouble in subsequent use can be reduced.

The invention provides a high-density Ti2AlNb powder alloy near-net forming technology.The technology comprises the following steps that 1, a Ti2AlNb alloy bar is smelted by taking components of Ti2AlNb-based alloy as ingredients; 2, the alloy bar processed through finish turning is put into plasma rotation electrode powder preparing equipment, and the Ti2AlNb alloy bar is prepared into Ti2AlNb spherical powder under the inert gas shielding condition; 3, the prepared Ti2AlNb spherical powder is located into a stainless steel or low-carbon steel sheath; 4, the sheath which contains the Ti2AlNb spherical powder and is compacted through vibration is degassed; 5, hot isostatic pressing forming is performed on the degassed sheath.The Ti2AlNb powder alloy prepared through the method has the isotropic character and is high in density degree, uniform in tissue and component, excellent in mechanical property and capable of achieving Ti2AlNb alloy parts with the large size and complex shapes.

The invention discloses a hydraulically-driven roadblock machine, which comprises a base, a cover plate and a hydraulic driving device. The cover plate is installed on the base. The hydraulic driving device is coupled on the cover plate and comprises a hydraulic source, a transmission mechanism, a rolling shaft, an inclined block, a cover plate supporting rod and an elastic piece. One end of the cover plate is fixedly hinged on the base. The hydraulic source is coupled to the rolling shaft through the transmission mechanism. The rolling shaft is arranged in a way that the rolling shaft can be driven by the transmission mechanism and can roll on the inclined block to move up, wherein the upwards moving direction faces towards one side of the fixed end of the cover plate. The elastic piece is arranged in a way that the elastic piece can transmit force to the rolling shaft to enable the rolling shaft to be restored downwards along the inclined block when the hydraulic source is turned off. The first end of the cover plate supporting rod is hinged on the rolling shaft. The second end of the cover plate supporting rod is hinged on the internal side of the cover plate. The hydraulically-driven roadblock machine provided by the invention ahs the advantages of compact and ingenious structure, small size, light weight, small thickness and wide application scope.

The invention discloses a spheroidizing annealing temperature control process of a cold-rolled steel coil. The temperature control process comprises the following steps: (1) the steel coil is fed in an annealing furnace, is heated up to 400 DEG C from room temperature within 3 h, and is kept at 400 DEG C for 2 hours; (2) the steel coil is heated up to 680 DEG C from 400 DEG C within 5 h, and is kept at 680 DEG C for 18 hours; (3) the heating is stopped in the annealing furnace; and the steel coil is cooled for 2 h in the annealing furnace; (4) the steel coil in the annealing furnace is cooled by air for 7-8 hours to reach 300 DEG C; and (5) the air-cooled steel coil is cooled by water to reach 90 DEG C; and after the spheroidizing annealing operation is finished, the steel coil is discharged from the furnace. The temperature control process realizes that the size and the uniformity of carbide particles of the steel coil are suitable for cold rolling through precise annealing temperature of the steel coil and time length control, and facilitates smoothness of cold rolling process.

Belonging to the field of diamond material preparation, the invention discloses a method for preparation of large size CVD diamond by vertical splicing and cutting. Specifically, epitaxial growth of large size CVD diamond is carried out on the sides of a plurality of vertically and tightly arranged monocrystal diamond seed crystals, and then the seed crystals and epitaxial diamond are separated bylaser cutting process in order to obtain large size CVD diamond. The process steps include: a. conducting precision mechanical polishing treatment on the upper surfaces of the plurality of verticallyand tightly arranged monocrystal diamond seed crystals to obtain seed crystals with a height difference within 10microm and surface roughness less than 1nm; b. conducting patterned grooving treatmenton the seams of all the seed crystals by laser etching, electron beam lithography, ICP etching, focused ion beam bombardment or other methods; c. employing microwave plasma chemical vapor deposition(MPCVD) method for epitaxial growth of the seed crystals' sides subjected to grooving treatment; and d. separating the seed crystals from the epitaxial large size diamond by laser side cutting in order, thus obtaining the large-size and high-quality monocrystal diamond.

The invention belongs to a tool clamp of the glue joint technology and discloses a glue joint structural part manufacturing tool adapting to different sizes. The tool comprises a male die, a female die, a pressure applying device and a temperature raising device, wherein the male die and the female die are connected through a guiding pin (10). The male die is composed of a rectangular cover plate (7) and pressing blocks (8) with different geometric sizes. The female die is composed of a rectangular bottom plate (1), side plates (2) which are installed on the bottom plate (1) and located on the left side and the right side, and end plates (3) which are located at the front end and the rear end. The side plates (2) and the end plates (3) are long rectangular blocks. Two kidney-shaped holes are formed in each long rectangular block. Each long rectangular block is connected to the bottom plate (1) through screws (4). The distance between the side plates (2) and the end plates (3) can be changed in the width direction and the length direction through the kidney-shaped holes. According to the tool clamp, by adjusting the relative positions between parts of the tool and the sizes of individual parts, the sizes of glue joint structural parts can be diverse, and tool cost is reduced. The tool body is provided with the temperature raising device and the pressure applying device, and the tool can be conveniently used in different occasions.

A fuel cell system includes a fuel cell, a battery, and a DC / DC converter capable of connecting the fuel cell and the battery on a power feeding circuit. A method of starting operation of the fuel cell system includes the steps of connecting a bypass line connected to a battery for bypassing the DC / DC converter to the power feeding circuit, and directly supplying electrical energy from the battery to an air compressor of an oxygen-containing gas supply apparatus through the bypass line in a state where the fuel cell is disconnected from the power feeding circuit.

The invention discloses a preparation method of a Pd / Ag nano-alloy catalyst for a direct ethanol fuel cell. The method comprises steps as follows: alcohol is added to water in the volume ratio of alcohol to water being (3-7):1, the mixture is stirred and sequentially mixed with polyvinylpyrrolidone, a metal palladium chloride precursor, a metal silver salt precursor and sodium citrate, the mixture is stirred at the temperature of 20-25 DEG C for 1.5-2.5 h and reacts for 1.8-12 h under a light condition, centrifugal separation is performed, precipitates are collected, washed and dried, and the Pd / Ag nano-alloy catalyst can be obtained. Polyvinylpyrrolidone is taken as a stabilizer and a guiding agent, the Pd / Ag nano-alloy catalyst is synthesized in one step under a mild condition by the aid of the reducing action of alcohol and sodium citrate, the synthesis efficiency is improved, the yield is increased, besides, the morphology of the catalyst has controllability, the catalyst has better catalytic activity for ethanol and can be used for the direct ethanol fuel cell, the preparation process is simple, the production cycle is short, large-scale production is easy to realize, and the catalyst has good application prospects.

The invention belongs to the field of navigation satellite applications and data processing, in particular to a new GNSS observation value data compression and decompression method which comprises the compression and the decompression of rough coordinates and antenna height information in GNSS observation values, the compression and the decompression of time data based on a sexagesimal system, the compression and the decompression of satellite numbers based on the sexagesimal system, the compression of the GNSS observation values based on the sexagesimal system and the recurrence differentialalgorithm, and the integration of the GNSS observation values based on the sexagesimal system and the recurrence integration algorithm.

To provide a compact image forming optical system in which an incident angle to an imaging plane of a solid-state imaging device is small and whose chromatic aberration, astigmatism, field curvature, and distortion are reduced. An image forming optical system of a first embodiment of the present invention comprises four lenses arranged from the object side to the imaging plane side in order, that are a first lens that is a double-convex lens, a second lens that is a double-concave lens, a third lens that is a positive meniscus lens that is convex toward an image side, and a fourth lens that is a negative meniscus lens that is convex toward an object side. An aperture is placed closer to the object than the image side surface of the first lens. The image forming optical system of the first embodiment of the present invention satisfies the following equations, where fi is an absolute value of a focal length of i-th lens, f is an absolute value of a focal length of a whole optical system, vdi is Abbe's number of i-th lens, and TTL is a distance from the object side surface of the first lens, in the object side surface and an aperture side surface, to the imaging plane. 0.425<f1 / f4<0.7  (1) 25<vd2<28  (2) 50<vd1,vd3,vd4<57  (3) 0.595<f2 / f4<1.05  (4) 1.5<f / f1<2.2  (5) f1<f3  (6) 1.05<TTL / f<1.18  (7)

A sensor vehicle of the present invention has one or more rotatable track means (parallel if two or more) spaced apart by a support frame and adapted to be towed or otherwise moved in a forward direction parallel to a forward axis of said track means. Rotatable track means have two or more supporting wheels aligned on a vertical plane along the forward axis, which axis is generally parallel to a ground surface upon which said sensor vehicle travels. Tracked vehicles are well known in the art of ground and earth moving equipment having flexible, elastomer-based tracks or segmented metal tracks with associated support frames and wheels, most of which may be adapted to achieve the objects of the invention.

The invention provides a rotary process three-dimensional knitting platform capable of increasing the number of carried yarns and a knitting method thereof. The knitting platform comprises inner carried yarn trays and outer carried yarn trays which are connected with the inner carried yarn trays located at the edge positions. 2*N notches are evenly formed in the edge of each inner carried yarn tray, N is a natural number which is larger than 1, every time the outer carried yarn trays are rotated by a circle, all the inner carried yarn trays are rotated by the 1 / (2N) circle, and the notches in the inner carried yarn trays are sequentially in butt joint with notches in the outer carried yarn trays. By means of the three-dimensional knitting platform and the knitting method thereof, on the premise that the size of the platform is not changed, the number of the carried yarns can be changed into about N times of an original number, and three-dimensional knitting pre-forming pieces of the larger size can be knitted on the limited knitting platform surface.

The invention discloses a control system for integrated synchronous jacking of a cut pier and a control method. The control system comprises two hydraulic jacking devices for providing jacking power, two hydraulic circuits connected with the two hydraulic jacking devices respectively, two oil feeding amount adjusting devices and a jacking balancing state monitoring device, wherein the two oil feeding amount adjusting devices are installed on the two hydraulic circuits respectively, and the jacking balancing state monitoring device performs real-time monitoring to a balancing state of a structure needing to be jacked in the jacking process and controls the two oil feeding amount adjusting devices according to monitoring results. The control method comprises the steps of jacking preparation and jacking, upward jacking is performed to the structure through the two hydraulic jacking devices in actual jacking until the structure is jacked to a preset height, and timely dynamic deviation rectification is carried out to the structure. The control system for integrated synchronous jacking of the cut pier and the control method are reasonable in design, high in automation, good in coordinating performance and safety performance and simple and convenient to control, enables the jacking process to be smooth and efficient, and can effectively solve the construction problem that unbalanced elevation discrepancy limitation in the pier cutting integration jacking process cannot be automatically controlled.

The invention relates to an optical cage light beam generation system based on a self-accelerating light beam. The system comprises a Gaussian light emission unit, a computer, a spatial light modulator and a Fourier lens, wherein the Gaussian light emission unit is used for emitting a Gaussian light beam and transmitting the Gaussian light beam to the spatial light modulator; the computer is usedfor pre-loading a predetermined optical cage light beam phase diagram to the spatial light modulator; the optical cage light beam phase diagram is obtained by performing radial symmetry on a self-accelerating light beam phase; the spatial light modulator is positioned on a transmission light path of the Gaussian light beam and is used for carrying out phase modulation on the Gaussian light beam according to the optical cage light beam phase diagram; and the Fourier lens is used for carrying out Fourier transform on the Gaussian light beam subjected to phase modulation to obtain an optical cagelight beam based on the self-accelerating light beam. According to the optical cage light beam generation system, the one-dimensional self-accelerating light beam is changed into the circularly-symmetrical annular self-accelerating light beam in a radial symmetry mode, the optical cage light beam phase diagram is obtained, the system is simple and efficient, the requirement for the experimental environment is low, and more flexible optical capture can be achieved.

The invention provides a polypyrrole modified Ag-Pd double-metal compound electro-catalytic cathode. The electro-catalytic cathode comprises a matrix and a catalyst layer attached to the outer surfaceof the matrix, wherein the matrix is prepared from a Ti sheet with a polypyrrole modified outer surface; the catalyst layer comprises Ag and Pd, which are deposited on the matrix in sequence. The polypyrrole modified Ag-Pd double-metal compound electro-catalytic cathode is prepared through a unique reparation technology provided by the invention; the cathode has the advantages of high catalytic activity, good stability, good chlorophenol wastewater degradation and reduction effect and low raw material cost, and has relatively good economic benefits. The technical problems of an electro-catalytic cathode in the prior art that the price is expensive, the stability is poor, the service life is short, the efficiency of a catalyst is not high and the like are solved.

The invention discloses a preparation method of a nanocellulose film precipitated by applying a water solution. The preparation method comprises the following steps: dissolving cellulose with concentration of 10-40g / L into a mixed solution of sodium hydroxide, urea and water at minus 15-minus 8 DEG C; after heating the cellulose solution to the room temperature, dropwise adding water to the cellulose solution to precipitate cellulose to obtain nanocellulose colloid dispersion liquid; filter-pressing the nanocellulose colloid dispersion liquid to obtain the nanocellulose film, wherein the mixed solution contains 5-10% of sodium hydroxide, 10-15% of urea and the balance of water by mass percent, and the volume ratio of water to the cellulose solution is (1-3):1. The method overcomes the defects of difficulty in acid waste liquor recovery, high preparation cost, high preparation energy consumption, heavy environmental pollution and the like in the existing preparation method of nanocellulose and the film thereof, and has the advantages of simplicity and high efficiency in operation, solvent reusability, environment friendliness and low energy consumption.

The present invention relates to an automatic document feeder having a document size detecting device. The document size detecting device includes a first paper guide plate, a second paper guide plate, a first elongated perforation, a second elongated perforation, a rack movement mechanism and a plurality of sensing members. The first paper guide plate includes a first paper stopping slice, a first rack and a rib, wherein the rib is disposed on the bottom of the paper input tray. The second paper guide plate includes a second paper stopping slice and a second rack. By moving the first paper guide plate to have the rib located between an optical emitter and an optical receiver of a specified sensing member, the size of the document placed on the paper input tray is realized.

A fuel cell system includes a fuel cell, a battery, and a DC / DC converter capable of connecting the fuel cell and the battery on a power feeding circuit. A method of starting operation of the fuel cell system includes the steps of connecting a bypass line connected to a battery for bypassing the DC / DC converter to the power feeding circuit, and directly supplying electrical energy from the battery to an air compressor of an oxygen-containing gas supply apparatus through the bypass line in a state where the fuel cell is disconnected from the power feeding circuit.

The invention discloses a resistive type space debris detection device. The resistive type space debris detection device comprises a detection casing, a first film group, a second film group and a piezoelectric effect detection layer, wherein the first film group and the second film group are identical in structure and are respectively composed of two layers of polymer films, parallel metal conductive wires at equal intervals are plated on each polymer film layer, the metal conductive wires between the adjacent film layers are perpendicular to each other, and the square grid closely-packed structure is formed. The invention further discloses a method utilizing the detection device to carry out space debris detection. The device is advantaged in that the structure is simple, control is convenient, and detection on the size, the speed, the direction and the mass of the space debris can be realized.

The invention discloses a computer graphics teaching device, which includes a projection support frame and a projection device. The projection device is composed of a projection screen and a projection shell. The top and bottom of the projection screen are provided with first slide rails. Each of the Two first sliders are slidably connected on the first slide rails, and a sliding screen is connected between the two first sliders corresponding to positions on the two first slide rails. The bottom end of the projection housing The side close to the first slider is provided with a first block, the inner bottom of the projection housing is fixed with a motor, and the driving end of the motor is fixedly connected with a first gear, and the inner side wall of the projection housing passes through the first bearing , a rotating shaft is rotatably connected, and a second gear is fixed on one side of the rotating shaft. The invention has simple operation and high practicability, and can well solve the modern problem that the graphics cannot be accurately displayed on the projection screen caused by insufficient installation precision of the projector.

The invention relates to a rectangular waveguide-based sweep frequency microwave imaging system based on matrix decomposition. The rectangular waveguide-based sweep frequency microwave imaging systemcomprises a computer, a display unit, an XYZ displacement mechanism, a directional signal beam splitting circuit, a signal analysis unit, a microwave signal source and a waveguide, wherein the computer is connected with the XYZ displacement mechanism by a serial port, controls the XYZ displacement mechanism to move the waveguide and executes data acquiring and processing; the display unit displaysa final detection result image; the XYZ displacement mechanism moves the rectangular waveguide or a detected object, realizes control over the detection distance between the waveguide and the detected object and acquires detection data; the directional signal beam splitting circuit separates and directs part of a transmission signal and a reflection signal; the waveguide is a rectangular openingwaveguide and realizes transmitting and acquiring functions of a microwave signal; the signal analysis unit is a vector network analyzer and realizes measurement of microwave signal amplitude and phase; the microwave signal source transmits the microwave signal to the waveguide by the directional signal beam splitting circuit; the waveguide is connected with the signal analysis unit by a coaxial cable; and the computer is connected with the signal analysis unit by a general purpose interface bus (GBIP).

The invention discloses a method for preparing a nanometer Pd electrocatalyst. The method comprises a hexagonal phase lyotropic liquid crystal preparation process, a Pd salt precursor reduction process and a unit aftertreatment process; and the shape of the generated nanometer Pd can be regulated and controlled by changing reaction time, illumination intensity and the like. By the method, the shape and the size of the prepared nanometer Pd electrocatalyst can be controlled and regulated; nanometer Pd electrocatalysts with controllable sizes and shapes are obtained according to different reaction time and bulb power; and the method is suitable for preparing electro-catalysis formaldehyde and other organic small molecular electrocatalysts. The preparation method is mild in condition, simple in process, short in production period and uniform in product and makes the nanometer Pd electrocatalyst easily produced on a large scale.

The invention is suitable for the field of mobile terminals and provides a mobile phone and an antenna thereof. The antenna comprises a first antenna radiating body, a second antenna radiating body, a third antenna radiating body, a feed end, a complete machine metal arm and lumped parameter elements. The first end of the first antenna radiating body is connected with the feed end. A gap is formed between the first end of the second antenna radiating body and the first end of the third antenna radiating body. The second end of the first antenna radiating body and the second end of the second antenna radiating body are connected through the one or more lumped parameter elements. The second end of the third antenna radiating body and the complete machine metal arm are connected through the one or more lumped parameter elements. The antenna is simple in whole structure, convenient to produce and manufacture and small in size.

The invention provides a conveying device for sectional bars. The conveying device comprises a longitudinal sectional bar feeding mechanism, a transverse sectional bar feeding mechanism, a sectional bar sorting mechanism and a control mechanism. The longitudinal sectional bar feeding mechanism is used for measuring the length and the width of the sectional bars and conveying the sectional bars to a transverse conveying station. The transverse sectional bar feeding mechanism is used for measuring the weight of the sectional bars on the transverse conveying station and conveying the sectional bars to a sorting station. The sectional bar sorting mechanism is used for arranging the sectional bars on the sorting station, and therefore the arranged sectional bars can fall into a sectional bar storage frame. The conveying device for the sectional bars is simple in structure, low in cost and high in practicability. The conveying device for the sectional bars conveys the sectional bars and meanwhile can measure the size and the weight of the sectional bars, and a sorting function is achieved. The conveying device for the sectional bars effectively solves the problems that in the current sectional bar machining machine industry, the automation degree is not high, measuring is prone to being disturbed, cost is high, and the production efficiency is low, and therefore the machining efficiency and the machining precision and quality of the sectional bars are improved.