10results about How to "High acceleration" patented technology

The invention discloses a cloud storage acceleration method and system based on edge computing, and relates to the field of electrical digital data process.The method comprises the steps that a file access track ring is constructed; extracting historical access files as a first associated file set; calculating the access time difference of each historical access file; determining a plurality of association clusters and two association file sets according to the access time difference; performing cyclic displacement in the second associated file set to obtain a displacement associated cluster; extracting a third associated file set; determining a prefetching file; setting an annular cache queue, and determining a prefetching position according to the position information; when the space of the annular cache queue is smaller than a preset value, the prefetched file corresponding to the prefetched position in the preset interval of the annular cache queue is reserved, and a final prefetched file is obtained; and when it is detected that the user accesses the target file, loading the final prefetched file from the cloud storage server to the edge server. The method and device are used for solving the problem that the cache hit rate of the associated files is reduced, and the cloud storage acceleration speed is increased.

The invention discloses a biaxial complete decoupling cutter servo device and a design method thereof, and the biaxial complete decoupling cutter servo device comprises a compliant mechanism platform, a piezoelectric stack I, a piezoelectric stack II, a diamond cutter, a measuring baffle plate, a capacitive displacement sensor I, a capacitive displacement sensor II and an upper cover plate, the diamond cutter is installed on the cutter holder platform, the compliant mechanism platform further comprises a topology compliant mechanism, a first input guide mechanism, a second input guide mechanism and an output guide mechanism, the output guide mechanism is located at the front end of the compliant mechanism platform, and the rear end of the topology compliant mechanism is connected with the front end of the first input guide mechanism and the front end of the second input guide mechanism. According to the method, the compliant mechanism is designed by adopting a topological optimization method, and the optimal mechanism configuration-parameter design can be sought under the condition that a design domain and specified input and output effects are given and a series of constraint conditions are met, so that the mechanism performance is optimal.

The invention relates to the technical field of consumer goods detection, and discloses a detection method for rapidly determining the content of twenty-two flame retardants in consumer goods, which comprises the following steps: S1, preparing a liquid sample; s2, putting a solid sample to be detected into a reaction tube, and adding a liquid sample; step S3, extracting; and S4, analyzing the sample solution by adopting a liquid chromatograph-mass spectrometer. The method can simultaneously detect the content of twenty-two organic flame retardants, utilizes ultrasonic extraction and LCMSMS analysis, makes up the disadvantages of gas chromatography, can rapidly determine the content of twenty-two organic flame retardants, is simple in operation and short in analysis time, and has very high test efficiency. According to the method, the repeatability is 0.3%-3.8%, the reproducibility is 1.3%-2.7%, the detection limit of the method is as low as 0.02 mg / kg, and the method completely meets the control requirements of all countries and the test requirements of customers.

The utility model discloses a shaft driving type linear motor with an external encoder, which belongs to the technical field of linear motors, and comprises a magnetic shaft assembly and a body assembly, the body assembly is fixed on a working platform, the magnetic shaft assembly is arranged in the body assembly in a sliding manner, a plurality of cylindrical magnetic steels are arranged in the magnetic shaft assembly, and the magnetic steels are arranged in the magnetic shaft assembly. Different magnetic poles of adjacent magnetic steels are close to each other, a three-phase winding is arranged in the body assembly, three leads of the three-phase winding are electrified with three-phase alternating current, an alternating magnetic field generated after the three-phase winding is electrified is coupled with a magnetic field of the magnetic steels in the magnetic shaft assembly, and then the magnetic shaft assembly is driven to reciprocate in the body assembly. The linear motor disclosed by the technical scheme of the utility model has the advantages of low inertia, high acceleration and no cogging effect, is relatively high in response speed and precision, and is suitable for application scenes with high frequency requirements.

The utility model belongs to mobile equipment technical field discloses a linear motion platform, including bottom plate, first mobile platform and second mobile platform, first mobile platform is placed on the bottom plate, including first drive part and first platform, first drive part can drive first platform relative bottom plate moves along the first direction, second mobile platform is placed on the first platform, including second drive part and second platform, second drive part can drive second platform relative first platform moves along the second direction, first drive part and second drive part are linear bar -like motor, and the first direction and the second direction are perpendicular. The linear motion platform of the utility model not only high distance precision of moving but also can move fast and steadily, and still need not frequent maintenance simultaneously.

A launch system and method for a launch vehicle that can save initial launch fuel includes a support structure, characterized in that: the support structure consists of a horizontal support frame (3) and an ascending section support frame (4), a horizontal track section (5) is installed on the horizontal support frame (3), an inclined track section (6) connected to the horizontal track section (5) is installed on the ascending section support frame (4), a launch acceleration pipe (10) is fixedly installed on the horizontal support frame (3) and the ascending section support frame (4), an electromagnetic catapult (14) is installed on the electromagnetic catapult slide rail (13), a rocket trolley (8) is installed on the horizontal track section (5) and the arc track section (6), and a rocket bracket (9) is provided on the rocket trolley (8). The present invention has a reasonable structure, can obtain sufficient initial velocity before launch ignition, can save launch fuel, can increase the effective payload, and is conducive to saving launch costs.

The invention relates to the technical field of plate stacking and carrying, in particular to an intelligent continuous plate production and stack transfer robot which comprises a transfer support, and the space below the transfer support is divided into a plate grabbing station, a middle transfer area and a stacking area in the length direction; a transfer hanging bracket is arranged under the transfer support, and a rope driving mechanism matched with the transfer hanging bracket is arranged on the transfer support and used for achieving lifting of the transfer hanging bracket. A composite grasping mechanism is arranged below the transfer hanging bracket, comprises a clamping unit and a vacuum adsorption unit, and is equipped with a buffer height control assembly; a positioning locking mechanism matched with the transfer hanging bracket is further arranged on the transfer support, comprises a transverse driving assembly, a locking base rod and an anti-falling frame and is used for achieving horizontal accurate movement and locking and anti-swing. Through combination of rope-driven lifting and positioning locking, the stability problem in the heavy-load plate transferring process is solved, the adaptability is improved by combining grabbing, efficient, continuous and automatic transferring and stacking of a production line are achieved, the structure is simple, cost is low, and reliability is high.

The invention provides a positioning mode switching system, method and device for a sounding rocket and a medium. The system comprises four GNSS positioning antennas, a baseband processing unit and a mode switching unit, the baseband processing unit comprises a first baseband SOC and a second baseband SOC, and the four GNSS positioning antennas are used for receiving navigation signals; the first baseband SOC is used for carrying out positioning processing on a first navigation signal of the first GNSS positioning antenna and a third navigation signal of the third GNSS positioning antenna by adopting a high-precision positioning algorithm to obtain first positioning information; the second baseband SOC is used for carrying out positioning processing on a second navigation signal of the second GNSS positioning antenna and a fourth navigation signal of the fourth GNSS positioning antenna by adopting a carrier phase adaptive fast tracking algorithm to obtain second positioning information; and the mode switching unit is used for switching the positioning mode according to the relationship among the first positioning information, the second positioning information and the threshold range.

The invention provides a parameter-controllable landslide test device, and the device comprises a track panel which comprises a track; the box body comprises a box body power wheel and a rolling bottom plate for loading a test object, and the box body power wheel is located on the track; the driving device is arranged on the box body and is used for driving the box body power wheel to drive the box body to move along the track based on a preset speed; the movable top plate is arranged at the top of the box body; one end of the shape keeping module is detachably fixed on the movable top plate, and the other end of the shape keeping module is used for keeping the outline shape of the test object; wherein when the box body moves to a preset position of the track along the track, the movable top plate moves to separate the form keeping module and the movable top plate, and the test object continues to move on the rolling bottom plate along with the box body based on the preset speed so as to carry out a landslide test.

The utility model belongs to electric fire range technical field discloses a kind of plasma generation assembly and electric fire, wherein, plasma generation assembly includes nozzle, plasma needle and cyclone tank;The nozzle is cylindrical structure, the cyclone tank is connected in the nozzle bottom end and is formed wind cavity with the nozzle inner side wall, one end of the plasma needle passes through the bottom wall of the cyclone tank and is located in the wind cavity;Several spiral grooves are equipped on the outer side wall of the cyclone tank, the spiral groove extends from the bottom wall of the cyclone tank to the upper wall of the cyclone tank, the wind cavity is communicated with outside by the spiral groove.Set up this spiral groove, wind can obtain higher acceleration in the process of flowing through spiral groove, the loss generated in the process that wind enters spiral groove is less, so that the flow and flow rate of wind that can enter the inside of wind cavity are all greater, more easily blow arc.