31results about How to "Adjustment range" patented technology

The invention provides a picosecond balance pulse signal generator. The picosecond balance pulse signal generator comprises a pulse signal generation circuit, a first shaping circuit and a second shaping circuit. The pulse signal generation circuit comprises an avalanche triode pulse generation circuit which is formed by two cascaded avalanche triodes and used for generating a bipolar nanosecond balance pulse signal by an inputted negative polarity trigger pulse signal via triggering. The front end of the first shaping circuit is electrically connected with the pulse signal generation circuit and used for shaping the nanosecond balance pulse signal so that a picosecond pulse signal is generated. The front end of the second shaping circuit is electrically connected with the first shaping circuit and used for shaping trailing and overshoot of the picosecond pulse signal. The high-amplitude picosecond balance pulse signal generator is simple in structure and small and exquisite in circuit structure, and the generated balance pulse waveform is great in symmetry, small in trailing and high in amplitude so that the picosecond balance pulse signal generator can be applied to a pulse type ultra wide band radar system, and detection requirements of the pulse type radar system for different depth and resolution can be met.

The invention relates to a method and a device for adjusting an intelligent antenna calibrating plate. The device is provided with the intelligent antenna calibrating plate, one or more plastic thin film(s) and a configuration device, wherein the plastic thin film(s) cover(s) the intelligent antenna calibrating plate and is or are used for adjusting a power amplitude value and a phase position value of the intelligent antenna calibrating plate; the configuration device is used for adjusting the intelligent antenna calibrating plate and comprises a net division meter and a quantized adjusting judging device, the quantized adjusting judging device is used for judging a phase position difference value and a power amplitude difference value between antenna ports of the intelligent antenna calibrating plate according to a signal of the net division meter, determining the power amplitude value needing to be adjusted and the phase position value needing to be adjusted according to the judged difference values and the product standard of the intelligent antenna calibrating plate and determining the position and the number of the plastic thin film(s) covering the intelligent antenna calibrating plate according to the values needing to be adjusted, and the quantized adjusting judging device also comprises a visual user interface capable of displaying a schematic diagram of the intelligent antenna calibrating plate and the position and the number of the plastic thin film(s) covering the intelligent antenna calibrating plate. Therefore, the quantized adjusting on the power amplitude value and the phase position value of the intelligent antenna calibrating plate can be realized.

The invention discloses staged porous charcoal, and a preparing method and applications thereof, and belongs to the field of material preparation and application. One or two of potassium citrate or sodium citrate, adopted as a raw material A, and one or more than two of calcium citrate, iron citrate or zinc citrate, adopted as a raw material B, are fully mixed; a template agent and an activating agent are generated through high-temperature carbonization and self-activation so that addition of extra template agents and activating agents is not needed; and the staged porous charcoal having a micropore-mesopore-macropore structure having three types of pores is prepared through one step, omitting a step of secondary activation. The preparing method is simple, short in period, low in cost andenvironmentally friendly. Through adjusting the mass ratio of the raw materials, the pore sizes and distribution of micropores, mesopores, and macropores in the staged porous charcoal can be adjusted.The prepared staged porous charcoal is wide in pore diameter distribution, high in pore capacity and high in specific surface area, and has a certain graphene structure. A solid microextraction probeprepared by utilizing the staged porous charcoal can achieve trace detection of organic pollutants in water environments.

The invention provides a large-amplitude high repetition frequency nanosecond balance pulse signal generator. The large-amplitude high repetition frequency nanosecond balance pulse signal generator includes a unipolarity pulse signal generation circuit and a balance pulse generation circuit, wherein the unipolarity pulse signal generation circuit includes a triode pulse generation circuit which is formed by triodes; each triode includes two cascades, has a cascaded connection design, and has avalanche effect; the unipolarity pulse signal generation circuit is used for generating a large-amplitude high repetition frequency nanosecond negative pulse signal, started by the input bipolarity start pulse signal; the front end of the balance pulse generation circuit is electrically connected with the unipolarity pulse signal generation circuit; and the balance pulse generation circuit is used for converting the large-amplitude high repetition frequency nanosecond negative pulse signal into a balance pulse signal, and generating a large-amplitude nanosecond balance pulse signal. The large-amplitude high repetition frequency nanosecond balance pulse signal generator has the advantages of being novel in design, being simple in the circuit structure, being high in the waveform symmetry of the generated nanosecond balance pulse signal, being low in the ringing level, being high in amplitude, and being high in repetition frequency, and being able to be applied to a pulse ultra wide band radar system to guarantee greater detection distance and good detection performance.

The invention discloses a photoelectric receiving sensor for an incremental displacement measurement device. The photoelectric receiving sensor solves the problems that displacement measurement precision is low, maintenance and debugging of finished products cannot be realized and optical signals cannot be output stably for a long term. The photoelectric receiving sensor comprises a photoelectric detector array, a summator, subtracters and a gain-variable amplifying circuit, wherein the photoelectric detector array outputs sinusoidal current signals corresponding to the optical signals, the gain-variable amplifying circuit receives the sinusoidal current signals, amplifies the sinusoidal current signals and converts the sinusoidal current signals into voltage signals, the summator sums the voltage signals output by the gain-variable amplifying circuit so as to obtain a direct-current voltage signal, the subtracters convert the voltage signals output by the gain-variable amplifying circuit into sinusoidal signals or cosine signals. The photoelectric receiving sensor adapts to multiple light source requirements and can analyze displacement information amount precisely, influences caused by light source nonuniformity and distribution nonuniformity of the photoelectric detector array are obviously reduced, the optical signals can be output by a light source stably for long term, and the photoelectric receiving sensor is adjustable in gain and simple in structure.

The invention discloses a jitter tolerance simulation verification method of a clock data recovery circuit. The jitter tolerance simulation verification method is implemented through the following three modules: a test data generating module, a clock data recovery (CDR) circuit and an error code detection module, wherein the test data generating module generates a pseudo random sequence superposed with jitter information as an input of the CDR circuit, consists of a jitter modulating clock and a pseudo random code generating module, and is implemented via VerilogA language design; the error code detection module performs an error code detection on an output data file of CDR simulation, and is implemented through Python scripts. The jitter tolerance simulation verification method comprises the following two steps: first, simulating the test data generating module and the CDR circuit to obtain the output data file of the CDR; then, performing the error code detection on the output data file by using the error code detection module. By the jitter tolerance simulation verification method, the jitter resistance of the CDR is evaluated in a design stage, so that tape-out risks are effectively reduced; in addition, the jitter tolerance simulation verification method is easy to implement and short in verification time and has relatively strong practicability.

The invention relates to a planar four-channel power combining amplifier, belonging to the technical field of communication, which solves the problems of limited adjustable range of amplitude and phase of the existing power combining amplifier and poor combining efficiency. The planar four-channel power combining amplifier comprises a power distributing module, a phase adjusting module, a power amplifying module and a power combining module which are connected in turn. The power distribution module is used for performing power distribution processing on the input signal according to the presetpower distribution demand to obtain four-channel power distribution signal. A phase adjusting module performs phase adjusting processing on four signals after power distribution. The power amplifyingmodule performs power amplifying processing on four signals after phase adjusting, and a power combining module performs power combining processing on four signals after power amplifying, so as to obtain the final signal output satisfying the preset power demand. The invention has the advantages of simple structure, small volume, high system stability and high output power, and the output power can reach more than 10W.

The invention provides a device for feeding shrimps and crabs. Both sides of a horizontal axle have a roller respectively; a machine frame is fixed above the axle, and the center of the machine frame is fixedly provided with a generator; the generator is connected with a transmission box; the axle is connected with a main shaft of the transmission box, and an auxiliary shaft of the transmission box is sequentially connected with a rotor of the generator and an impeller middle shaft of a centrifugal fan by couplings; a saddle-shaped hopper is arranged above the generator, two lower ends of the saddle of the hopper are connected with each other by a spiral feeder, and the bottom part of the output end of the spiral feeder is provided with a discharge hole which is communicated with an opening of an air discharge tube by a downwards inclined material-conveying tube; and the other end of the hopper is provided with a motor. The device has multiple functions; the device can realize movable feeding, plowing and the like; and the device has high flexibility and adjustable traveling speed and feeding quantity.

The invention discloses a pneumatic double-jaw chuck for mini-tillers. The pneumatic double-jaw chuck comprises a base, jaws, a positioning block, levers, a cone and a draw bar. The right end of the hollow base is detachably connected onto a spindle of a machine tool, two through strip-shaped grooves are formed in the outer edge of the left end of the base, the left end of the draw bar is connected with the cone, the cone is gradually diminished from the left to the right and is positioned in a middle cavity of the base, the middles of the levers are pivotally connected into the strip-shaped grooves, the jaws are connected to the left ends of the levers, the right ends of the levers extend into the middle cavity of the base and are butted onto the outer edge of the cone, the positioning block is positioned between the two levers and is arranged in the cavity of the base, and a positioning boss is arranged at the left end of the positioning block. According to the scheme, the pneumatic double-jaw chuck has the advantages that clamping effects can be conveniently and quickly realized, the pneumatic double-jaw chuck is easy to operate, castings of the mini-tillers can be quickly fixed, and accordingly the production efficiency can be greatly improved.

The invention provides a fabrics inspection device, belongs to the weaving machine technical field, and solves the problems that an existing fabrics inspection device is hard to release fabric and inconvenient to collect fabrics; the novel fabrics inspection device comprises a frame having an inspection screen; an LED lamp is arranged in the inspection screen; the frame is also provided with an upper roller group and lower roller group in an axially fixed and peripherally rotating manner; a mounting rod is fixed between the upper and lower roller groups, and sleeved with a mount; the mount is provided with a pressure roller capable of always pressing the fabric on the inspection screen; one side of the inspection screen is provided with a fabric release device used for releasing the fabrics, and the other side of the inspection screen is provided with a fabrics collector used for collecting the fabrics. The fabrics inspection device can clearly and conveniently inspect the fabrics, and can help to release and conveniently collect fabrics.

The invention discloses an intelligent electric cradle capable of conveniently pacifying a baby. The electric cradle comprises a cradle main body, a cradle support frame, a driving mechanism and a controller, wherein arc-shaped sliding blocks are symmetrically arranged at two ends of a length direction of the cradle main body; arc-shaped sliding grooves, which are matched with the arc-shaped sliding blocks, are formed in the cradle support frame; the driving mechanism comprises a drive motor, a speed-reducing rotary disc and a transmission rod; one end of the transmission rod is connected to an eccentric position of the speed-reducing rotary disc via a hinge and an electromagnetic pushing plate is connected to the other end of the transmission rod via a spherical hinge; a shaking magneticplate is arranged at the bottom of the cradle main body; and a sound sensor is arranged in the cradle main body. According to the intelligent electric cradle provided by the invention, as baby's crying is detected by the sound sensor, a system is started to automatically control the cradle to get shaking so as to pacify the baby, and the cradle is stable in shaking, safe and reliable and is relatively low in noise; and the cradle can achieve a good effect of soothing the baby and improve baby's sleep quality; therefore, the cradle is conducive to baby's growth.

The invention discloses an adjustable pressure sensor and a using method thereof and relates to the technical field of electronic devices. The device comprises a cylindrical base body, wherein a thermal resistor is arranged in the cylindrical base body and is of an annular structure; a plurality of guide grooves are formed in one side face of the cylindrical base body in the circumferential direction, guide pieces are slidably matched with the interiors of the guide grooves, and connecting rods are fixedly connected to the surfaces of the guide pieces; one end face of the connecting rod is fixedly connected with a pressure detection mechanism, and the pressure detection mechanism is matched with the thermal resistor in position. Through the design of the reset elastic piece, the thermal resistor, the spherical stress plate and the heat conversion element, when pressure acts on the spherical stress plate, a distance between the heat conversion element and the thermal resistor can be flexibly adjusted, and the heat conversion element is utilized to sense the temperature change near the thermal resistor, so pressure acting on the spherical stress plate is detected; compared with a traditional pressure sensor, output of capacitance or resistance variation is easier to measure.

The invention provides a child neurology lower limb training device, and relates to the technical field of rehabilitation training equipment.The child neurology lower limb training device comprises a training table and a supporting structure, and the supporting structure is fixedly installed at the bottom of the inner side of the training table; the fixing frame is fixedly installed at the bottom of the inner side of the training table, and the fixing frame is installed on the front side of the supporting structure; the swing rod is connected and mounted on the supporting structure; the first round rod is mounted on the supporting structure in a penetrating manner; the second round rod is installed on the supporting structure in a penetrating mode, and the second round rod is installed on the front side of the first round rod; the connecting rod is connected and mounted at the top end of the upper side of the swing rod, and the problems that a lower limb training device is complex in structure and cannot well adapt to children, the training process is boring, and consequently the training efficiency and the training effect are relatively low are solved.

The invention discloses a spraying device with an adjustable spraying distance, which comprises a box body, self-suction assemblies, a spraying assembly and an adjusting assembly; the spraying assembly is arranged on the top of the box body in the circumferential direction, and the spraying assembly is used for directionally spraying water flow to a target area; the self-suction assemblies are installed on the two sides in the box body, and the self-suction assemblies are communicated with the spraying assembly; a partition plate is horizontally arranged in the box body; the adjusting assembly is installed between the partition plate and the top of the box body; a through hole is arranged at the top of the box body; the adjusting assembly is in sliding fit with the through hole; auxiliary liquid adding assemblies are installed on the two sides of the box body and communicated with the spraying assembly; and rotation of the spraying assembly is adjusted through the adjusting assembly, while high-speed spraying is achieved, adjustment of the water flow spraying range and the spraying distance is guaranteed, and large-range agent spraying can be achieved.

A power supply circuit for the filament of high-power electronic tube features that it uses a voltage-stabilized switching power supply controlled by PWM circuit and a smoothing controller for raising up its reference voltage from zero to rated value smoothly. It can make the voltage smoothly applied to the filament until a steady value, preventing current shock to elongate the service life of electronic tube by more than 5 times.

The invention discloses a combined lamp. The combined lamp comprises a lamp shell. An illuminating lamp is arranged on the lamp shell. The lamp shell is of a hollow cylindrical structure. The illuminating lamp comprises a main illuminating lamp body and a plurality of auxiliary lamp bodies. The main illuminating lamp body is arranged in the center of the lower end of the lamp shell. The auxiliarylamp bodies are uniformly arranged on the periphery of the main illuminating lamp body. The edge of the lamp shell is provided with an annular containing cavity. The lower end of the containing cavityis of an opening structure. The edge of the lower end of the lamp shell is provided with two fixing rings. The two fixing rings are arranged on the two sides of the opening of the containing cavity correspondingly. The distance between the two fixing rings is less than the width of the opening of the containing cavity. A shielding curtain is arranged in the containing cavity. The lower end of theedge of the lamp shell is provided with fixing components.

The invention discloses a transmission device for an electrically tunable base station antenna. The transmission device comprises a radome bottom plate, wherein one end of the radome bottom plate is vertically and fixedly provided with a radome side plate, the upper side of the radome bottom plate is horizontally provided with a threaded rod, one end of the threaded rod penetrates through the radome side plate and is coaxially and fixedly provided with an adjusting knob, the other end of the threaded rod is provided with an electric driving assembly in a matched manner, the threaded rod is coaxially sleeved with a movable seat, the movable seat is matched with the threaded rod in a threaded mode, a mounting block is fixedly arranged on one side of the movable seat, a ruler is horizontally and fixedly connected to the mounting block, a guide limiting mechanism matched with the ruler is arranged on the radome side plate, a mounting table is fixedly arranged on the other side of the movable seat, a supporting plate is horizontally and fixedly arranged on the mounting table, a pull rod is arranged on the upper side of the supporting plate in a matched mode, and one end of the pull rod is matched with a rotation control mechanism. According to the invention, the antenna of the electrically tunable base station can be accurately adjusted, the downward inclination angle can be adjusted, the horizontal direction can also be adjusted, and the effect of better optimizing the communication quality can be realized.

The invention discloses an integral device for paving and pressing a graphite raw material and extracting a graphite single crystal. The integral device comprises a graphite sheet material producing device and a graphite single crystal preparing device. A special thin graphite sheet is produced, and then a single crystal is separated out by utilizing the thin graphite sheet. In comparison with the prior art, by using the integral device, a graphite powder solution discharged from a graphite dust outlet and an adhesive outlet in a paddle is flatwise paved and pressed; a thin graphite sheet material is formed; the thin graphite sheet material is placed on an interlayer to be heated; the single crystal separated from the sheet material is peeled off in cooperation with a vibrating device; after the thin graphite sheet material is heated at a high temperature, a single crystal layer is more easily separated; the efficiency of extracting the graphite single crystal is higher; the energy consumption is less.

The invention relates to a multifunctional car connector detecting system. The multifunctional car connector detecting system comprises a test table, a clamp, conveyor belt conveyors, a plurality of sorting box bodies and a mechanical hand, and further comprises a central controller, a label identifier, a rotary disc mechanism, a camera, an image identifying processor and a standard connector picture storage, wherein the conveyor belt conveyors and the sorting box bodies are separately arranged at the two sides of the test table; the label identifier is arranged on the conveyor belt conveyors;the clamp is arranged on the test table through the rotary disc mechanism; the camera is arranged at one side of the rotary disc mechanism; the camera is aligned to a terminal of the connector; the image identifying processor is separately connected with the label identifier, the camera and the standard connector picture storage; and the central controller is separately connected with the image identifying processor and the mechanical hand. Compared with the prior art, the multifunctional car connector detecting system has the advantages of being capable of quickly and accurately detecting the terminal of the car connector, effectively controlling flow-out of defective products and overcoming the defect that the car cannot be seen by a tool microscope and labor power.

The invention discloses a side support structure for auxiliary installation equipment of an air conditioner indoor unit. The installation equipment includes a base plate and a lifting machine. The side support structure includes a first side support, a second side support, a third side support, a fourth side support and an electric push rod which are arranged outside the lifting machine. The telescopic end of the electric push rod is hinged to the first side support, the motor end of the electric push rod is hinged to the lifting machine, the first side support and the second side support arein adjacent connection and in linkage, the second side support and the third side support are in adjacent connection and in linkage, the third side support and the fourth side support are in adjacentconnection and in linkage, second castors are arranged at the bottom ends of the first side support, the second side support, the third side support and the fourth side support, and clamping and fixing structures are arranged on the second side support, the third side support and the fourth side support. The side support structure can be automatically unfolded by one-key operation, is convenient to operate, does not occupy too much space, is convenient to fold, collect and move, and is good in side support stabilization effect, the risks of damage to equipment and indoor units can be reduced,and the safety and practicality are improved.

The invention discloses a storage type camera for teaching and a control system, and relates to the technical field of cameras. The camera comprises a mounting plate and a camera body, and a storage barrel is rotatably arranged at one side of the mounting plate; a driving assembly is arranged in the storage barrel; the driving assembly is movably connected with the camera body; the camera body isarranged in a mounting shell in a sliding manner; a driving motor is arranged at one side of the mounting plate; an output shaft of the driving motor is fixedly connected with a connecting rod, and the connecting rod penetrates through the mounting plate; the other side surface of the mounting plate is fixedly connected with a sleeve; a limiting ring is formed at an opening of the sleeve; a fixingplate and a fixing pipe are fixedly connected to one side surface of the storage barrel in sequence; and an annular channel is formed in the fixing pipe in the axis direction of the fixing pipe. Through the effects of the mounting plate, the camera body, the storage barrel, the driving assembly and the mounting shell, the problems that when an existing camera is protected, the camera needs to bemounted again in use, and the angle is inconvenient to adjust are solved.

The invention provides a respiration detection device, a respiration detection method and a magnetic resonance imaging system. The respiration detection device comprises a transmitting coil, a receiving coil and a decoupling module, wherein the transmitting coil is configured to transmit a radio frequency signal for detecting the respiratory movement of a detected body; the receiving coil is configured to receive a respiration receiving signal, wherein the received respiration receiving signal comprises a radio frequency interference signal and a respiration modulation signal, the radio frequency interference signal is a signal that the radio frequency signal directly reaches the receiving coil through spatial coupling, and the respiration modulation signal is a signal that the radio frequency signal reaches the receiving coil after passing through the detected body and being modulated by the respiration of the detected body; and the decoupling module is configured to generate a cancellation signal corresponding to the radio frequency interference signal during scanning of the magnetic resonance system, and the radio frequency interference signal in the respiration receiving signalis cancelled by using the cancellation signal to obtain the respiration modulation signal so as to detect the respiratory movement of the detected body.

The invention discloses an ornithopter driving device and an ornithopter. The flapping wing aircraft driving device comprises a driving bracket and a flapping wing structure, wherein the flapping wing structure is arranged on the driving bracket through a rotating shaft. The driving support is provided with an iron core, and the iron core is sleeved with a coil. The flapping wing structure is located above the iron core, a permanent magnet is arranged on the side, facing the iron core, of the flapping wing structure, when the coil is powered on, the coil and the iron core generate a magnetic field, and the magnetic field attracts or repels the permanent magnet, so that the flapping wing structure rotates close to or away from the iron core. According to the flapping-wing air vehicle driving device, current and reverse current are alternately supplied to the coil, vertical flapping of the flapping-wing structure can be achieved, power can be provided for the flapping-wing air vehicle, the flapping force degree, amplitude and frequency of the flapping-wing structure can be adjusted by adjusting the magnitude and turning frequency of the supplied current, and the flapping effect of the flapping-wing air vehicle is improved. Different lift forces and speeds are provided for the ornithopter, the driving modes of the ornithopter can be enriched, and the loading capacity of the ornithopter is improved.

The invention relates to the technical field of fire fighting, and discloses a fire hose rack convenient for fixed-point and movable use, the fire hose rack comprises a bottom plate, the top of the bottom plate is fixedly provided with a mounting rack, the top of the mounting rack is fixedly provided with a storage turntable, the top of the bottom plate is fixedly provided with a sleeve, and the top of the bottom plate is fixedly provided with a vertical plate; a lifting plate is fixedly mounted on the outer wall of the vertical plate, a threaded transmission rod is movably mounted in the sleeve, a lifting assembly is mounted on the outer portion of the threaded transmission rod in a threaded mode, and a bevel gear is mounted on the outer portion of the threaded transmission rod in a threaded mode. According to the fire hose frame convenient for fixed-point and movable use, one end of a fire hose is connected with a spray gun head, the other end of the fire hose is connected with a water source, the spraying direction of the spray gun head can be adjusted in cooperation with a steering assembly, and when an adjusting assembly is rotated, a bevel gear and a threaded transmission rod are driven to rotate, so that a lifting assembly in threaded connection drives a limiting assembly.

A pulse driver with variable level displacement and variable output amplitude belongs to the technical field of pulse electronic circuits, in particular relates to a topological structure of a driving circuit in the electronic circuit. The invention comprises the following steps: two basic electronic circuits are composed of two triodes and a resistance, wherein a first basic electronic circuit is designed as a paraphase follower and a first voltage reference point is led, and a second basic electronic circuit is connected as an emitter follower and a second voltage reference point is lead. The structure of the invention is that: the two basic circuits are connected and communicated with each other by diodes at a positive direction; the two voltage reference points are connected by the resistance. The pulse driver has the effective results that usual diodes, triodes and resistors employed in the circuit realize the reference level displacement between a driving circuit and a driven circuit, meanwhile, conveniently regulate pulse extent, and the large output power facilitates integration. The invention provides the pulse driver which can be easily mass-produced, with low cost and can be widely applied in every electronic field to market.

The invention discloses a photoelectric receiving sensor for an incremental displacement measurement device. The photoelectric receiving sensor solves the problems that displacement measurement precision is low, maintenance and debugging of finished products cannot be realized and optical signals cannot be output stably for a long term. The photoelectric receiving sensor comprises a photoelectric detector array, a summator, subtracters and a gain-variable amplifying circuit, wherein the photoelectric detector array outputs sinusoidal current signals corresponding to the optical signals, the gain-variable amplifying circuit receives the sinusoidal current signals, amplifies the sinusoidal current signals and converts the sinusoidal current signals into voltage signals, the summator sums the voltage signals output by the gain-variable amplifying circuit so as to obtain a direct-current voltage signal, the subtracters convert the voltage signals output by the gain-variable amplifying circuit into sinusoidal signals or cosine signals. The photoelectric receiving sensor adapts to multiple light source requirements and can analyze displacement information amount precisely, influences caused by light source nonuniformity and distribution nonuniformity of the photoelectric detector array are obviously reduced, the optical signals can be output by a light source stably for long term, and the photoelectric receiving sensor is adjustable in gain and simple in structure.

The invention discloses a preparation device for a single-crystal graphite material. The preparation device comprises a reactor, wherein multiple interlayers for arranging graphite sheets are arranged in the reactor and fixed on the inner wall of the reactor; multiple wear plates corresponding to the multiple interlayers are fixed on the inner wall of the reactor and partially located above the interlayers; friction particles are arranged on the side, facing the corresponding interlayer, of each wear plate, and a resistance heater is arranged on the other side of the wear plate; a vibration device is arranged and connected with all the wear plates; an internal blower device is arranged on the reactor. Compared with the prior art, the preparation device for the single-crystal graphite material is characterized in that the graphite sheets are heated at a high temperature firstly and then worn physically by the wear plates, single crystals separated at the high temperature on the surfaces of the graphite sheets are separated from the graphite sheets, and single graphite crystals are prepared.

The invention discloses a variable-speed shake mechanism. The variable-speed shake mechanism comprises a base, an oscillating bar, a gear connected to the base and a rack slidingly connected to the base, wherein the rack is driven by a cylinder, the gear is engaged with the rack, a cam is coaxially connected to the gear, the cam is detachably connected with the gear and propped against the oscillating bar, the oscillating bar is a telescopic structure, and one end of the oscillating bar is hinged to a frame, while the other end of the oscillating bar is connected to the frame through a spring. The variable-speed shake mechanism is characterized in that the cylinder drives the rack to move and then the rack drives the gear to rotate, as the cam is coaxially connected with the gear, the gear is capable of driving the cam to rotate, and the cam drives the oscillating bar to swing. In use, the amplitude and the swinging speed of the oscillating bar can be regulated by selecting the number of teeth of the gear and the shape of the cam. Simultaneously, the cam is detachably connected with the gear, so that different gears and cams can be selected conveniently. The oscillating bar is the telescopic structure so that the length of the oscillating bar can be regulated according to practical situations.