223results about How to "Achieve speed" patented technology

One embodiment of the present invention includes a system comprising a housing having an upper end and a lower end. The housing carries a plurality of movable blades defining an entry aperture proximate to the upper end, an exit aperture proximate to the lower end, and a chamber there between. An adapter may be provided for connection to the housing and for receiving an article storage container. The upper end of the housing carries a sensor responsive to the presence and absence of the article storage container. A memory device carries information about the presence and absence of the article storage container. An article determining and actuating station has electronics for interrogating the memory device, for controlling the plurality of blades and for determining the number of items dispensed. A receptacle collects articles that have been dispensed. Methods of associating a flow control device with an article storage container and of dispensing items are also disclosed.

The invention discloses a five-axis linkage numerical control (NC) machining post processor and a processing method thereof, and relates to a post processor for an NC machining program and a processing method. The processor comprises computer program software which is used for processing a cutter location source file generated by a workpiece shape characteristic and a machining process, wherein the computer program software comprises a file management function module, a cutter management function module, a postprocessing function module, an NC file modification function module, a G code simulation function module, an NC file transmission function module, a coordinate system offset function module, an error compensation function module, a speed modification function module, a programming mode function module and a cutter-lifting and programming staring point function module. The processing method comprises the steps of setting a file, arranging a cutter, processing a programming mode, processing data of machine tool motion parameters, processing data of cutter dynamic cutting speed, outputting a G code file and the like. By the processor and the processing method, machining dynamic speed, speed compensation, non-linear error compensation and analog simulation of G code five-axis linkage can be realized.

The invention relates to the technical field of rainwater collection and processing, and discloses a novel rainwater retention infiltration system. The novel rainwater retention infiltration system comprises a pre-processing tank and a retention infiltration tank, wherein the pre-processing tank is arranged at the outer side of the retention infiltration tank; the pre-processing tank and the retention infiltration tank are separated by virtue of a perforated partition board; gravels are kept in the pre-processing tank; the retention infiltration tank is sequentially provided with plants, a water storage layer, a coverage layer, a planting soil layer, a packing layer, an isolating layer and a gravel layer in a thickness direction; a drainage pipeline is arranged in the gravel layer of the retention infiltration tank; an overflow pipe is vertically arranged in the retention infiltration tank; one end of the overflow pipe communicates with the drainage pipeline and the other end is exposed out of the retention infiltration tank; and a reoxygenation pipe is arranged in the packing layer. With the application of the system provided by the invention, stormwater runoff pollution load can be effectively reduced, rainwater runoff volume and peak can be diminished and the problem that the system gets blocked can be effectively prevented; and the system is simple in structure, low in maintenance cost, simple and feasible in implementation and broad in application scope.

Embodiments of the present invention recite a level shifting circuit for high voltage protection. In embodiments of the present invention, the level shifting circuit comprises a first transistor, a second transistor, a third transistor, and a fourth transistor coupled in a cascode configuration. The circuit further comprises a fifth transistor, a sixth transistor, a seventh transistor, and an eighth transistor coupled in a cascode configuration. The level shifting circuit further comprises an output coupled with the source of the first transistor, the gate of the seventh transistor, and with the drain of the second transistor. A first inverter is coupled with a second inverter in series and an input signal conveyed to the first inverter dynamically controls the bias level for said second and sixth transistors.

The present invention discloses a turbo-rocket combined ramjet engine, which comprises an air turbine ramjet and a rocket based combined cycle engine that share an air intake passage and an exhaust nozzle. An air intake passage guiding device is disposed on a duct of the air intake passage. The air intake passage guiding device is used for turning to seal an inlet of the rocket based combined cycle engine at low-speed start of the air turbine ramjet to achieve internal communication of the air intake passage and the air turbine ramjet, and further used for turning to seal an inlet of the air turbine ramjet when a speed of the air turbine ramjet is greater than or equal to Mach, thereby achieving internal communication of the air intake passage and the rocket based combined cycle engine to start the ramjet. A solution is provided for the problem that two existing power systems cannot independently and completely meet the power requirements of modern warfare on weapon systems in such aspects as ultrahigh acoustic velocity, superaltitude, high maneuverability and high airspace.

A mobile communication apparatus is disclosed, comprising a processor and a user interface UI connected to said processor, wherein said UI comprises a touch sensitive rotator input including a first sensor for providing a start signal indicating the starting position of a touch entry, and a second sensor for providing a rotation signal indicating an amount of rotation of said subsequent touch entry and the rate of movement. A processor uses a predictive system indicating a next likely entry and the sensor signals to present a selection on a display. Reliance on the predictive system is adjusted according to the speed of movement of the touch entry.

The disclosed method for controlling speed of servo system of AC motor combines inner and outer two control rings. In the inner control ring, using coded disc measures speed of motor based on object of motor. Using load - torque observer carries out feedback control. In the outer control ring, using model of electrical motor through lowpass filter obtains estimated speed of rotor. Calculated average speed is input to feedback loop so as to form feedback control in close loop for whole control system. The method possesses high load capacity and capacity of anti external interference. The invention is suitable to control speed of AC servomotor.

The invention discloses a multi-sensor multi-target cooperative detection information fusion method.acquiring original data of radar measurement equipment; preprocessing the original data to obtain processed data; performing sensor information registration according to a time registration algorithm and a space registration algorithm, so that all sensors obtain observation information at the same moment and at the same time and space; trace point-track association is carried out according to a target association algorithm and the maneuvering target model to obtain a target track; track-track association is carried out according to a K-means algorithm to obtain an accurate track; and performing fusion processing on the processing data according to a fusion algorithm to obtain an accurate track and real-time motion parameters of the tracking target. The multi-target cooperative detection information fusion scheme provided by the invention has the advantages of flexible configuration, strong universality and good expandability; and real-time data processing is carried out through the airborne data processing unit, so that the task load of a remote control center is reduced, and the timeliness and safety of the scheme are improved.

One embodiment of the present invention includes a system comprising a housing having an upper end and a lower end. The housing carries a plurality of movable blades defining an entry aperture proximate to the upper end, an exit aperture proximate to the lower end, and a chamber there between. An adapter may be provided for connection to the housing and for receiving an article storage container. The upper end of the housing carries a sensor responsive to the presence and absence of the article storage container. A memory device carries information about the presence and absence of the article storage container. An article determining and actuating station has electronics for interrogating the memory device, for controlling the plurality of blades and for determining the number of items dispensed. A receptacle collects articles that have been dispensed. Methods of associating a flow control device with an article storage container and of dispensing items are also disclosed.

The invention discloses a testing system for a double-fed motor and a testing method thereof. The system disclosed by the invention comprises a generator unit, a motor unit and a system starting unit, wherein the generator unit comprises a motor A and a double-fed frequency converter A; the motor unit comprises a motor B and a double-fed frequency converter B; the system starting unit comprises astator short circuit contactor A and a stator short circuit contactor B; and the motor A and the motor B are double-fed motors of the same specification and model and are in rigid connection through a coupling. The method disclosed by the invention comprises a stator short circuit rotor frequency conversion operating mode and a double-fed operating mode. In the invention, the short circuit is carried out on a stator assisting to test the motors, and a rotor is controlled by the double-fed frequency converters, thereby realizing the self-starting of a towing system. According to the invention,the problems that the speed regulation range is narrow and the double-fed motors cannot be started in the double-fed operating because of the limit of the rotor output voltage of the double-fed motors are solved; and the starting and low-speed operating of the system are realized by changing the control method of the double-fed motors, and the test cost is greatly saved.

A ship hull structure includes a main hull and a movable rearbody having an engine and a propeller. The movable rearbody is located at a lower side of a stern of the main hull, connected with an aft of the main hull to form an integral unit by a hinge linking device allowing the rearbody to pivot up and down. By a block, a crane or a winch and through a chain or a hanging wire, a pivoting angle of the movable rearbody with respect to the main hull can be adjusted and controlled. A bottom of the hull can be provided with at least one, usually plural, air cushion recess, which is filled with pressurized air to reduce a viscous force between a bottom of the ship and water. When a ship of this kind of structure is sailing, the rearbody can be lifted up by the block or the winch, allowing part of the propeller to be separated from a water surface to reduce resistance in the water that the engine can achieve a required rotational speed (RPM) in a short time. Next, the rearbody is laid down slowly, allowing the propeller to be put into the water, thereby increasing propulsion and quickly achieving a cruising speed. When the ship is sailing and encounters with wind wave, the stern will ascend by longitudinal pitching; at this time, the rearbody can descend by its own weight, with a hinge axis as a center, preventing the propeller to leave the water surface to rotate idly. On the other hand, when a bow ascends (that is, the stern descends), the rearbody will maintain a normal draught height by buoyancy of the water and the force between the water and running propeller Therefore, for the entire ship, a wetted surface area of the propeller can be adjusted automatically to keep at a best sailing condition, which can further save fuel consumption significantly. In another embodiment that the bottom of the ship is formed with the air cushion recesses, a friction force of the water can be reduced to increase a ship speed by the air cushion effect formed at the bottom of the ship.

The invention discloses a predicting method for longitudinal wave speed and attenuation in a pore fracture medium. The predicting method comprises the following steps of 1 obtaining ultrasonic speed experimental data of change along with pressure; 2, building an effective medium theory conforming to microcosmic pore structure characteristics of a pore fracture reservoir, and solving microcosmic pore structure characteristics inside rock in combination with the obtained experimental data; 3, deriving a stress strain relationship of the pore fracture medium; 4, deriving a motion equation of thepore fracture medium; 5, simulating the fractures as a coin-shaped embedding body to simulate flow of pore fluid among the pore fractures, and deriving a local area flow control equation of the pore fracture medium; 6, utilizing planar wave analysis for predicting longitudinal wave speed and attenuation of the pore fracture medium; 7, further guiding exploration and development of underground oiland gas reservoirs through the obtained longitudinal wave speed and attenuation of the pore fracture medium. According to the predicting method, the coin-shaped embedding body is utilized for simulating flow of the pore fluid among the pore fractures, and then transmission characteristics of seismic waves in the pore fracture medium are studied.

The sensitivity, diffraction efficiency, etc. of hologram recording materials is improved. Disclosed is a resin composition for a hologram recording material, the resin composition comprising: a photosensitive component comprising (a) a monomer having a vinyloxy group, (b) a compound having a (meth)acryloxy group, and (c) a photopolymerization initiator; and a prepolymer component, wherein the component (a) is designed so as to be relatively higher or lower in refractive index than the prepolymer component.

A manufacturing method for a three-dimensional formed object for manufacturing the three-dimensional formed object by stacking layers includes supplying a first forming material of the three-dimensional formed object to a contour region of the three-dimensional formed object in the layers, applying energy to the first forming material supplied to the contour region to solidify the first forming material, supplying a second forming material to a region corresponding to the three-dimensional formed object, the region being a contact region in contact with the contour region, and applying energy to the second forming material supplied to the contact region to solidify the second forming material.

The invention relates to a remote accelerator control method. An electronic manual accelerator and an accelerator converter box are arranged. The method is characterized in that: the accelerator converter box is connected in parallel with an accelerator pedal and the manual accelerator; an accelerator select switch controls the switching between the accelerator pedal and the electronic manual accelerator, and transmits a generated linear signal to an electronic control unit (ECU) to regulate the torque and rotating speed of an engine; and through the method, the remote accelerator control is realized, an operator can regulate oil supply amount outside a cab and control the rotating speed and the torque of the engine, and the modification of special vehicles is greatly facilitated.

The invention relates to an automatic winding machine. The automatic winding machine comprises a stand, and a flat cable mechanism, a fixing mechanism, a winding mechanism, a shifting mechanism and a programmable logic control (PLC) automatic control system which are arranged on the stand, wherein the flat cable mechanism comprises a bracket, a guide rod which is arranged on the bracket and a correction sensor roller which is arranged on the guide rod; the fixing mechanism comprises a fixed main shaft and a mounting and fixing block which is arranged on the fixed main shaft; the shifting mechanism comprises a shifting motor and a correction sensor roller shaft shifting piece which is connected with the shifting motor and into which a copper wire is inserted; both a winding motor and the shifting motor are electrically connected with the PLC automatic control system; the shifting mechanism is provided with a correction sensor which is connected with the PLC automatic control system; and under the coordination of the PLC automatic control system, the rotation speed of the winding motor and the shifting motor can be adjusted, the accumulative difference which is generated by a flat cable and a wound wire during multi-turn multi-layer winding can be randomly corrected, the flat cable is precise and attractive, and the working efficiency is improved.

The invention discloses multi-medicament loaded calcium phosphate cement powder. The multi-medicament loaded calcium phosphate cement powder is prepared by directly mixing more than one prophase release medicament, polymer microspheres loaded with a long-term release medicament and calcium phosphate cement powder, or performing precipitation blending on more than one prophase release medicament and an ingredient in the calcium phosphate cement powder and uniformly mixing the obtained product with other ingredients of the calcium phosphate cement powder and the polymer microspheres loaded with the long-term release medicament. The powder is suitable for filling and repairing bone defects with different volumes and different shapes; moreover, the loaded prophase release medicaments and the loaded long-term release medicament can be released for co-administration in different time sequences at local positions of the bone defects; and the powder, through the synergism, enhances therapeutic effect, promotes bone healing, improves the success rate of clinical filling and repair of the bone defects, and can reduce the side effect of the medicaments on organisms and meet the clinical demand on bone filling and repair materials at the same time.

The invention discloses a four-degree-of-freedom parallel mechanism capable of realizing three-dimensional translation and one-dimensional rotation. The parallel mechanism comprises a fixed frame, a movable platform, and four branch chains which are arranged between the fixed frame and the movable platform and adopt the same structure, wherein each branch chain comprises a rotating fork, an active arm, two parallel slave arms which are equal in lengths, and four T-shaped shafts; the rotating forks are connected with the fixed frame in a rotating manner; each active arm is connected to the inside of the corresponding rotating fork in a rotating manner; one ends of every two corresponding slave arms are connected with the corresponding active arm through two T-shaped shafts, and the other ends of the slave arms are connected with the movable platform through two T-shaped shafts. The movable platform of the parallel mechanism adopts a single-platform structure, and has the characteristics of simple structure, light weight and the like, and the realization of dynamic response characteristics with high speed and high acceleration is facilitated.

The present invention discloses a turret mounting machine, which comprises a rack electronic control module. The top of the rack electronic control module is provided with a carrier pallet basket lifting device. One side of the carrier pallet basket lifting device is provided with a carrier pallet grasping and conveying device. One side of the carrier pallet grasping and conveying device is provided with a carrier pallet automatic transmission device. The carrier pallet automatic transmission device is connected with a sorting XYtheta compensation system and one side of a sorting XYtheta videosystem is provided with a turret high-speed pick-and-place system. One side of the turret high-speed pick-and-place system is provided with a wafer XYtheta compensation system; the top of the wafer XYtheta compensation system is provided with a wafer CCD video system; the wafer XYtheta compensation system is provided with a XY self-correcting thimble system; one side of the XY self-correcting thimble system is provided with a wafer grasping and conveying device; and one side of the wafer grasping and conveying device is provided with a wafer basket lifting device. The invention solves the problems that a traditional mounting machine adopts a structure of single swing arm and single suction nozzle, the operation accuracy and production speed can not be improved, and the high-speed high-precision surface mounted product manufacturing requirements can not be satisfied.

The invention designs a three-axis acceleration sensor based on a diamond NV color center. A diamond NV color center is used as a sensitive component, the NV color center is excited by using 532-nm laser, fluorescent light is emitted on the condition of external microwave adding, and collection and data processing are carried out to obtain an ODMR spectrum. A three-dimensional coordinate axis is established; a magnetic field is applied in a certain direction to obtain a corresponding ODMR spectrum; the obtained ODMR spectrum is compared with known ODMR spectrums obtained by applying magnetic fields in three coordinate directions to obtain an externally applied magnetic field direction; and a resonance frequency difference between two fluorescence intensity peaks in the ODMR spectrum is measured to obtain the magnetic field intensity of the externally applied magnetic field. The size and the direction of the externally applied magnetic field are related to the value and direction of theacceleration speed, so that the direction and value of the acceleration speed are measured. Therefore, the design objective of a three-axis acceleration sensor is achieved.

The invention discloses a high frequency macro-energy hydraulic pile hammer which comprises a hydraulic pump and a hammer core, wherein the hydraulic core comprises an inner cylinder sleeve and an outer cylinder sleeve mounted in a spaced manner in a sleeving manner, and an oil inlet channel is formed between the inner cylinder sleeve and the outer cylinder sleeve; a piston rod fixedly connected to a piston penetrates through a cylinder cover and a static supporting sleeve axially to be supported on the static supporting sleeve, a cylinder oil inlet and a cylinder oil outlet are formed in thecylinder bottom, the cylinder oil inlet is communicated to the oil inlet channel between the inner cylinder sleeve and the outer cylinder sleeve; the oil inlet channel is communicated to a rod cavityof the hydraulic cylinder through the oil inlet hole in the inner cylinder sleeve, and a cylinder oil return hole is communicated to a rodless cavity of the hydraulic cylinder; the oil outlet of the hydraulic pump communicates to the cylinder oil inlet and a pressure oil hole of a second inserting valve in parallel, and an oil hole B of the first inserting valve is connected to the cylinder oil outlet; and a control valve as a pilot valve forms a direction control loop with the second inserting valve. The hydraulic pile hammer is simple and reasonable in structure and small in influence on ambient environment, can drive a pile at a high frequency with micro-energy, so that the hydraulic pile hammer is particularly suitable for large foundation pile construction.

The invention discloses a digital closed-loop optical fiber gyroscope full-loop detection and simulation test system which comprises an optical system module, a pre-amplification module, a digital processing module, a feedback module, a communication module and a ground detection and simulation test system. Under a condition of no turntable, the digital closed-loop optical fiber gyroscope full-loop detection and simulation test system can realize full-loop detection on an optical fiber gyroscope; under a condition of no angle vibration table and sudden stop table, a stand-alone bandwidth test on the optical fiber gyroscope can be implemented; the self-condition limitation of the conventional mechanical equipment is avoided in a test process; under a condition that any auxiliary ground detection circuit is not added, a dynamic simulation function of a branch system can be realized, and parameter limitation caused by auxiliary circuits is avoided; complicated dynamic simulation is implemented. According to the digital closed-loop optical fiber gyroscope full-loop detection and simulation test system, the power consumption and weight of a product are reduced, and the cost is lowered; minimized and low-cost design of the product is realized.

A ceramic material has piezoelectric characteristics, can be sintered at low temperature, and is suited to various piezoelectric devices. The ceramic material primarily includes Pb, Zr, and Ti and has the general formula ABOd, in which A is (Pb1−aM1a−b), where M1 is selected from the group consisting of group 3A elements, Li, Na, K, Mg, Ca, and Sr, and B is [(M21 / 3Nb2 / 3−c)αZrβTiγ], where M2 is one or more elements capable of forming at least a perovskite structure in the ceramic material, or the formula PbxM31−x[(M41 / 3Nb2 / 3)e(Co1 / 3Nb2 / 3)f(Zn1 / 3Nb2 / 3)gZrhTii]O3, where M3 denotes one or more elements selected from among the group consisting of La, K, Er, and Yb and M4 denotes an element selected from among the group consisting of Ni, Mn, and Sr. The ceramic material can be prepared by sintering at a temperature of 950° C. or less and has good piezoelectric characteristics, in particularly good longitudinal elongation (d33) and a low dielectric loss factor (tan δ), even at a high Curie temperature (Tc), as well as a good electromechanical coupling factor (Kp).

The invention discloses a three-degree-of-freedom high-speed parallel robot mechanism. The mechanism comprises a fixing frame, a supporting platform, a moving platform as well as a first branch chain,a second branch chain and a third branch chain which are arranged between the fixing frame and the moving platform; each of the three branch chains comprises a near frame rod, far frame rods and a rotating fork; the rotating forks of the three branch chains are rotationally or fixedly connected to the supporting platform; one end of each near frame rod is connected with the corresponding rotatingfork, and the other end is connected with the corresponding far frame rods; the far frame rods are connected with the moving platform; and the supporting platform is rotationally connected with the fixing frame. The mechanism is ingenious, simple and compact in structure and clear in motion mode, two-dimensional translational motion and one-dimensional rotation can be realized, the mechanism hasvery large working space, supporting rods are adopted between the far frame rods of the third branch chain, the rigidity and the dynamic response characteristic of the mechanism are favorably improved, and the high speed and the high acceleration are favorably realized.

The invention discloses a bodybuilding bicycle system based on a virtual reality technology. The bodybuilding bicycle system comprises a single chip microcomputer, a heart rate sensor, a sensor for measuring the blood pressure of an exerciser, a pressure sensor for measuring the weight of the exerciser, bluetooth communication, a human health data APP in a mobile phone, virtual reality glasses, amotor driving circuit, a stepping motor and a fan. The single chip microcomputer receives the information of the heart rate sensor, the sensor for measuring the blood pressure of the exerciser, and the pressure sensor for measuring the weight of the exerciser, and transmits the information to the human health data APP in the mobile phone through the bluetooth communication, meanwhile, the single chip microcomputer receives the gradient and speed information in the virtual reality glasses, the stepping motor and the fan are controlled to make corresponding response through the motor driving circuit, and the resistance sense and speed sense are achieved. According to the bodybuilding bicycle system provided by the invention, the synchronization of human body vision and human body perceptionis realized, the interaction with a virtual reality scene is increased, and the experience feeling of the exerciser is enhanced.

The invention discloses a five-degree-of-freedom parallel mechanism capable of achieving three-dimensional translational motion and two-dimensional rotation. The mechanism comprises a fixed frame, a movable platform, a large rotating shaft, a first branch chain, a second branch chain, a third branch chain and a fourth branch chain, wherein the first branch chain and the second branch chain are arranged between the large rotating shaft and the movable platform, and the third branch chain and the fourth branch chain are arranged between the fixed frame and the movable platform; the large rotating shaft is rotatably connected with the fixed frame, and the first branch chain and the second branch chain each comprise a rotating fork, a driving arm and two parallel and isometric driven arms; and the first branch chain and the second branch chain are fixedly connected with the large rotating shaft through the rotating forks, and therefore the two branch chains are synchronously and rotatably connected around the fixed frame. The first branch chain and the fourth branch chain each comprise a connecting shaft and are coaxially and rotatably connected with the movable platform through the connecting shafts. A single-platform structure is adopted in the movable platform of the parallel mechanism, and the five-degree-of-freedom parallel mechanism has the beneficial effects that the structure is concise, and the movable platform is light; and the high-speed and high-acceleration dynamic response characteristics are facilitated.

The invention relates to the field of health care and beauty products and medical instruments, in particular to a belly massager suitable for gastrointestinal motility insufficient patients and abdominal obesity patients. The belly massager can be manufactured in three types which are the single-disc belly massager, the four-disc belly massager and the two-disc belly massager. According to the single-disc belly massager, a motor is connected with a massage shaft component and a massage head component through an eccentric coupler and drive the massage shaft component and the massage head component to rotate, so that a bottom massage disc conducts parallel circular motion, and the belly of a patient is massaged. The four-disc belly massager and the two-disc belly massager are each provided with two gear motors, each motor drives two sets of massage shaft components and massage head components to rotate through a driving gear and a driven gear, and multiple portion massage is achieved. The massage head components can be rapidly detached and installed, and massage heads are convenient to replace. The belly massager is small in size and weight and can be held by hands or tightened through a pull belt to conduct massage, a user operates the belly massager conveniently and freely, and the belly massager has the relatively high use comfort level and massage efficiency.

An engine spray flow field near-field region optical diagnosis system comprises a light splitting system, a multiplexing system, an optical Kerr gate strobing imaging system, and a comparison imaging system, which are disposed along the incident direction of femtosecond pulse laser. The light splitting system split the incident femtosecond pulse laser into three beams of light pulses which are different in wavelength and polarization characteristic and adjustable in time interval. The three beams of light pulses respectively record information of a spray flow field near-field region at different time points through the multiplexing system and then go through the optical Kerr gate strobing imaging system for imaging respectively. The optical Kerr gate strobing trajectory light imaging system can be used to effectively remove the influence of diffusion light and increase the imaging signal-to-noise ratio. The particle speed and acceleration information can be calculated through a single particle track in three flow field graphs recorded by the comparison imaging system.

The invention discloses a device for dropping a buoy by adopting an unmanned boat. The device for dropping the buoy by adopting the unmanned boat includes the unmanned boat and the buoy; the unmannedboat includes a first cabin used as a ballast water tank, a water inlet with a solenoid valve is formed in the bottom of the first cabin, and the water inlet is used for guiding ballast water into thefirst cabin; and the buoy is placed on the unmanned boat, and the bottom of the buoy is connected with the unmanned boat through a flexible composite pipe. According to the device for dropping the buoy by adopting the unmanned boat, the work of dropping the buoy can be effectively completed, the consumption of a large number of human resources can be reduced, and meanwhile, the safety accidents of water staffs can be avoided. After the buoy is dropped, the unmanned boat is used as an anchor to reduce the scope of buoy activity, and the influence of water flow on the change of buoy position isreduced.

The invention relates to a milk-frothing device with a dynamic mixing unit, having a stator (1) and a rotor (2), which can be made to rotate (R) relative to the stator (1), wherein the rotor (2) and stator (1) are designed such that milk (M) and air (L, L / D) first of all can be directed to (3) the dynamic mixing unit, then can be subjected a number of times to a shearing action for frothing purposes in the dynamic mixing unit, by rotation (R) of the rotor (2) relative to the stator (1), and finally can be directed out (4) of the dynamic mixing unit.