70 results about "Libration" patented technology

A filtering apparatus comprises a microporous membrane and an actuator. The membrane is positioned to traverse across the hollow interior of a conduit used for the transport of molecules in bulk. In one example, the pores of the membrane comprise a plurality of open-ended carbon nanotubes. The actuator comprises a transducing material such as a polyvinyledene fluoride film that is operatively positioned in contact with the membrane and is capable of propagating acoustic vibration onto the membrane at a particular frequency so as to hasten the movement of the molecules through the membrane. Similarly, a method of filtering water comprises the steps of: (a) sifting molecules of water through the membrane, the pores of the membrane comprising a plurality of carbon nanotubes; and (b) propagating acoustic vibration onto the microporous membrane at a libration frequency of ice so as to hasten movement of the water molecules within the carbon nanotubes.

The invention relates to a libration simulator for a space laser communicating platform and is provided with a laser emission unit (6), an optical power adjusting unit (7), a beam servounit (8), a beam extending unit (9), a communicating optical transmitter and receiver (10) for the tested laser, a beam servo drive unit (11), a DA transfer card (12), a power spectrum generating unit (13) and an optical table (14). The invention can simulate on low frequency agitation and high frequency libration and can effectively inspect and verify the APT tracing precision of a space laser communicating system. A simulative bandwidth can reach to 100Hz, the maximum simulative extent of low frequency can reach to 20mrad, and the controlling precision of high frequency extent can reach to Mu rad magnitude. The invention has broader dynamic range, can librate randomly according to the wide spectrum of a power spectrum simulative platform, can also simulate the movement of a relative angle and sinusoidal excitation, and can detect on the dynamic lag error of the APT system, realize two-dimensional libration simulation, realize optical power adjusting and big caliber parallel beam emission and meet the test requirement for the tracing precision of the space laser communicating APT.

The invention discloses a mini-type electromagnetism low frequency energy collector in the field of electronic component which comprises a libration pick up structure, a support structure and a micro-coil structure. The libration pick up structure comprises a metal plane spring and a permanent magnet. The metal plane spring comprises four square spirality elastic arms and a metal platform. The permanent magnet is arranged at the metal platform. The micro-coil comprises a micro-coil winding and an insulated underlay. The metal plane spring and the support structure are integrated as a whole. The libration pick up structure and the support structure are at the micro-coil. The libration pick up structure of the utility model has a natural frequency near to 100 HZ and is easy to satisfy the integrated requirements such as improvement of the low frequency energy collecting efficiency, low production cost and integrated production.

This invention relates to information transmission channel equipment technology from ground to underground in underground closed loop guide intelligent borehole system, specifically relates to a kind of method and system for borehole that delivering down order. The existing technology is in narrow scope, its incept sensitivity and fault tolerant is low, the demand of installation is high and system structure is complex. To overcome the shortcomings of existing technology, the invention provides a kind of method for borehole that delivering down order. It is a kind of signal transmission and control method that uses the sensitivity libration change of the acceleration sensor which is set around the aiguilles in the down-hole, and coding this change to the tools in the down-hole. The invention also provides a kind of system for borehole that delivering down order, includes the sensors and decoding identification module set in the drill collar, its characteristic is: it includes signal adjustment module, the said sensor is acceleration sensor.

The invention relates to a method for designing an earth-moon libration point transfer orbit via moon leveraging constraint, and belongs to the field of design and optimization of spacecraft orbits. The method comprises the following steps: selecting an injection point position of a target Halo orbit and an expected moon leveraging constraint size, and integrating the state parameter of an injection point via an equation (1) until a spacecraft arrives at an expected moon leveraging position. The state parameter of the injection point is corrected and regulated by a related optimization algorithm, so that the state of a leveraging position satisfies the constraint condition of an equation (3), and then the increment size of a maneuvering speed necessary for the spacecraft for entering the Halo orbit is determined. Since the moon leveraging constraint condition and the Halo orbit injection point and other parameters are selected, a transfer orbit with low energy consumption and capable of satisfying task requirements can be effectively designed.

The present invention provides a device for generating librations which can thin-type ultrasonic and do not generate noise even though oscillating with low frequency and large amplitude. The above mentioned device contains: base part (1) with evenness shape soleplate (1a), the first spring part (2) installed on the mentioned base part (1), and the counterbalance composed of non-magnetic material. The mentioned counterbalance is supported by the first spring part (2) and oscillates in the horizontal direction parallel to the soleplate (1a) of the base part (1). On the above mentioned counterbalance, there are strip-shaped mandrils (13) composed of magnetic material enwind by loop (12), and on the top end of the mandril length direction setting magnet (7) with the regulation interval, inner the above mentioned loop (12) the magnetic flux generated by electrifying acts on the one of the above mentioned magnet (7), thus the above mentioned counterbalance (9) librates in the mentioned horizontal direction through the first spring part (2).

The invention relates to a characteristic detecting facility through gigantic magnetic resistance (GMR) feeler search. This invention is consist of magnetic field arisesing device, which include magnet position modulating parts and a revolution flat roof, and gigantic magnetic resistance (GMR) feeler search depositing device which located in the central of the magnetic field arisesing device. The invention disclosed a characteristic gigantic magnetic resistance (GMR) feeler search detecting method. In broad-band magnetic field, it can work well under the temperature and libration interferes. Due to this reason, the capability changing of a feeler search under such interfere is overall evaluated, then, an input-output characteristic curve will be built in nature. This facility is simple and convinence, especially proper for quick gigantic magnetic resistance (GMR) feeler search characteristic detecting in large quantities.

The invention belongs to measuring and controlling technique filed of electromechanic system, relates to realizing method and control system based on self-apperceive performer of double-direction electromechanic transducing material. Time division multiplexing decoupling and control system of self-apperceive performer adopts double-direction transducing element, using switching sequence control circuit to control double-direction transducing element as sensor or performer, when the double-direction transducing element is as the sensor, it used sensing switch, when the double-direction transducing element is as the performer, it used executing switch, it uses discharging switch to discharge the double-direction transducing element, the three switches are conducted or closed under control of switch sequence control circuit. The invention decreases volume and weight of electromechanic system, and makes structure controlled integrated and micromated, decreases difficulty of craftwork and installation; it is controlled in parity, increases stability of control. It fits for structure libration initiative control, system identification and health diagnosis, especially fits for flexible structure whose volume and weight are limited.

The invention relates to a method for dealing with water by adopting sweep-frequency technique and equipment thereof, which adopts sweep-frequency pulse electromagnetic field and direct current electric field to treat water simultaneously or in sequence by sweep-frequency technique. The sweep-frequency pulse electromagnetic field spectrum produced can change continuously and can be applied to the water in suspense with various properties; wherein, the sweep-frequency pulse electromagnetic field can facilitate the cellular elements of alga or microbe to generate libration, breakage of cell walls is aroused, the substances contained in cell accumulate together so as to arouse death of alga or microbe, and the effect of sterilization and killing alga is realized. And the electrolysis of the direct current electric field can generate much active substances in the water, such as OH<->, ClO<->, H2O2, HClO, and the like, and the effect of sterilization and killing alga can be enhanced. Additionally, direct current electric filed and the sweep-frequency pulse electromagnetic field can produce electrochemical reaction and electrocoagulation effect, thus removing organic matter and heavy metal ions in the water, lowering turbidity, removing suspended substance and lowering COD (chemical oxygen demand) and BOD (biological oxygen demand), etc.

The invention discloses a kind of waterpower dynamotor. The machine shell includes two layers between which there are hatches in the partition. The impellor is in it. The lamina of the impellor is columnar, whose cross section is arc. Outside the lamina is the power water lamina, which is hollow columnar. Above the shell there is the entrance of water linking with the hole of water-in. the below layer is linking with the water-out hole. Waste comes in between them from the water-in hole, then flows into the lamina, pushing the lamina, and then flows out from the circle hatch. Because of the power of water pushing is from everywhere which is even, the lamina can be smooth when operating, so it avoids the phenomenon of librations and swings.

The invention provides an autonomous navigation method for a libration point constellation. The method basically comprises the steps of firstly, constructing the state equation of a spacecraft based on the dynamic characteristic of the spacecraft at the libration point; secondly, observing a pulsar through a detector on a spacecraft in the constellation, calculating the included angle between the base line vector of the two spacecrafts and the absolute direction vector of the pulsar with the relative time delay of a pulse signal arriving at the two spacecrafts as the measurement quantity, and constructing a system observation equation on this basis; finally, processing a libration point dynamical model and observation information by means of the filtering algorithm, and obtaining the position information and velocity information of each spacecraft through time updating information and measurement updating information. The problem that autonomous positioning of a libration point constellation is hard to achieve currently is solved, and autonomous navigation and positioning of constellations are achieved through pulsar observation.

The invention discloses a position selection method for observing and tracking a small body based on a Sun-Earth libration point, which belongs to the technical field of aeronautics and astronautics. The method comprises the following steps of: acquiring five dynamic libration points by a three-body system consisting of space observation spacecrafts, the Sun and the Earth; selecting a qusi-periodic orbit near the L2 point as the location point of the first space observation spacecraft; and selecting the L4 point and the L5 point as the location points of the second space observation spacecraft and the third space observation spacecraft so as to construct the observation network of the three space observation spacecrafts to observe and track the small body in combination. In comparison to the prior art, the method provided by the invention can observe and track the small body for a long period, and has the advantages of good stability, less energy consumption for keeping the positions of the spacecrafts, long observation and tracking arc segments, and so on.

The invention provides an aircraft navigation method based on earth high orbit-earth and moon libration point heterogeneous constellations. The aircraft navigation method comprises the following steps of firstly, utilizing a pulsar detector and intersatellite ranging observing equipment to obtain the corresponding pulsar and intersatellite ranging observing amount, so as to realize the autonomous navigation of the earth high orbit-earth and moon libration point heterogeneous constellations; after the heterogeneous constellation realizes the autonomous navigation, arranging the intersatellite ranging observing equipment on the aircraft, and observing the heterogeneous constellations to obtain the corresponding position information; using a corresponding navigation method to determine the self position and speed, so as to realize the autonomous navigation of the aircraft. Compared with the navigation method based on a ground measuring and controlling system, the aircraft navigation method based on the heterogeneous constellations has the characteristics that the communication delay is little, the signal attenuation is little, the positioning accuracy is high, and the navigation efficiency is high.

A control device for sewing machine, predetermines that: during the forbidden period that the feed switch mechanism is forbidden to switch in feeding direction during the period that the main shaft rotates one circuit, when the feeding switch indicating part receives the switch indicating from the feeding direction, the feeding switch mechanism will not been acted until wait for the period except the forbidden period. The forbidden period is predetermined in the period with big libration of the needle bar and sewing needle generated with the action of the feeding switch mechanism, by making the feeding switch mechanism act in the period exception the forbidden period, namely the period with little libration, then not restraining the libration but preventing the sewing needle from contacting with the component formed by the needle hole in the big libration status, not only realizing favorable action responsibility of the feeding switch mechanism, keeping the feeding switch mechanism reliably at the feeding position, but also preventing the depreciation of the sewing needle reliably.

The invention provides a suction device of a capacity controlling rotary compressor. The suction device includes a motor, an upper cylinder and a lower cylinder which are arranged in the shell body of the compressor, a clapboard arranged between the cylinders, pistons arranged in the cylinders, a sliding vane arranged in a cylinder sliding vane slot, an eccentric crankshaft for driving the piston to operate, a bearing for supporting the eccentric crankshaft, and a capacity valve for controlling the capacity. The two cylinders share a same suction pipe. The suction pipe is communicated with a cylinder of normal working state in a two-step varactor or with a higher-displacement cylinder in a three-step varactor, or the suction pipe is communicated with the clapboard, the clapboard is respectively communicated with the upper and the lower cylinders. The upper cylinder is directly communicated with a first suction pipe; the lower cylinder is communicated with the first suction pipe through a lower suction hole arranged on the lower cylinder, a clapboard through hole arranged on the clapboard, and a cylinder axial communicating hole arranged on the upper cylinder. The invention has the advantages that the manufacturing cost is low, the noise is low, the libration is slight, and the process and the assembling techniques are simple.

The invention relates to the technical field of spacecraft formation reconfiguration, and provides a libration point spacecraft formation reconfiguration method based on a self-adaption agent model. The method comprises the steps that 100, a sun-terrestrial system libration point nearby spacecraft formation controlled kinetic equation is built; 200, according to the spacecraft formation reconfiguration mission requirement, an optimization target is selected to obtain the optimization problem of spacecraft formation reconfiguration; 300, the self-adaption agent model of spacecraft formation reconfiguration is built, and the optimal reconfiguration track of a spacecraft formation is obtained through the self-adaption agent model; 400, the value range of a variable in the self-adaption agent model is narrowed, the step 300 is repeated in sequence, and the validity of the self-adaption agent model is verified. On the premise of the high computational efficiency, the formation reconfiguration result very close to the actual optimal solution can be obtained.

A method to test multichannel noise and shake based on computer processing has two signal input mode: hardware input and file input used for signal ex post analysis. In hardware input, firstly, take sensor and data collecting module to form continuous data collecting module connected by BNC. Then, connect the module with computer by USB for inputting signal into computer. In file input, program read data from designated file and analyze. Its analyzing process is: set parameters for task, which includes signal analyzing parameters, window function selection of spectrum and coherence analysis, average mode and its parameters, selection of average mode and weighted window function in octave-band analysis. If in hardware input, it needs point file position.

The invention relates to an earth-moon libration point interorbital transfer design method. The method comprises the following steps that a, under the earth-moon mass center rendezvous coordinate system, an orbital kinetic equation of a detector is built; b, libration point invariant manifold data are stored; c, a transfer track splicing point range is searched; and d, a libration point interorbital optimal transfer track is determined. According to the libration point track invariant manifold state amount, splicing point positions of different track segments are rapidly determined, positionsof escape points and capture points are automatically adjusted, and the target track size are adjusted automatically, and the low-energy transfer track capable of meeting the task needs can be effectively designed.

The invention discloses an automobile engine oil pressure monitoring method. An automobile comprises an engine oil pressure sensor, an engine electric control unit (ECU) and a fault indicating device. The method comprises the following steps of: detecting the current engine oil pressure by using the engine oil pressure sensor at intervals of a predetermined time, judging whether the current engine oil pressure is in a calibration range by the ECU, and synchronously judging whether an insulate value of an engine oil pressure difference between the current engine oil pressure value and the engine oil pressure value of the last detection is in the libration range by the ECU; when the current engine oil pressure is not in the calibration range and / or the engine oil pressure difference between the current engine oil pressure value and the pressure value of the last detection is not in the libration range, performing fault treatment by the ECU and activating the fault indicating device. With the adoption of the automobile engine oil pressure monitoring method, the abnormal change of the engine oil pressure occurred in a libration zone can be monitored, so that a latent problem of the automobile is can be warned early.

The present invention provides an elastic bush adjusting mechanism of inverter scroll compressor to ensure radial sealing force of dynamic static vortex teeth when the inverter scroll compressor running in low frequency to enlarge the frequency range of inverter scroll compressor, decrease libration and noise of climb-down and reset after climb-down, improve stability of radial joggle of dynamic and static vortex teeth, reduce machining and assembling precision of main parts such as crank pin, dynamic and static vortex disk of inverter scroll compressor, prolong service life of dynamic and static vortex disk, sliding bearing of dynamic vortex disk. The elastic bush 4 is mounted on a crank pin 6 connected with the principal axis 5, a sliding bearing 2 is mounted on the elastic bush 4, a dynamic vortex disk 1 is mounted on the sliding bearing 2, an arc spring 3 is mounted between inner surface of sliding bearing 2 and side plane of crank pin 6, the convexity of arc is towards axes line O2 of the crank pin 6.

The invention discloses a kind of method and device to eliminate runner mouth eddy flow, this method is to set up 8 or more flow deflectors at the front-end of runner mouth, and make the runner mouth' spindle as the center when the fluid enters runner mouth then form many centripetal fluids and into the runner mouth. The mentioned guide plate is radial and equidistant set up. This invention can effectively eliminate all kinds of eddy flow which is resulted by the angular velocity brought when fluid flows, so that it increases the fluid's flowing efficiency largely and decreases resisting force libration and noise .When it is used in hydro power station, it can increase the water's speed in the channel, accordingly, increases the dynamo's power evidently. When it is used in airspace area, it can remarkably improve the air current' flow field station in the inlet channel, and decrease the possibility of engine surges or even ceases which is produced by eddy flow in the inlet channel when the plane flies. This invention is also suitable to use on the other mechanical devices which have runner and use fluid as mediator.

A filtration equipment cleaned by ultrasonic and cleaning method. The filtration equipment comprises a container and more than one filtration tubes which connects in order and sets up in the container fixed. The filtration tubes have a wate-inlet and water-outlet outside of the container. In the container there is at least one second-water-inlet which has a valve. In the side wall of the container fixed an ultrasonic displacement device that connects with ultrasonic electrical source. When cleaning the filtration tubes, we fill water that immerges filtration tubes and through second-water-inlet into the filtration tubes. High-frequency electricity is transformed to mechanical libration and transfered to the water in the container by ultrasonic displacement device.

The invention relates to a stacking rubber supporting rigidity variable protection device that belongs to structure trembling insulated and libration control technology field. The device includes fixed box body, stacking rubber supporting, spring, plugs, slot, rolling supporting and screw. The plugs incorporate with the stacking rubber supporting. The slot connects to the series connected spring group that is fixed on the side of the fixed box body. The device has the advantage of quick response speed, and can adapt different rigidity demand. And it is simple structure, small volume and no energy consumption.

The invention relates to a rendezvous control method for a libration point orbit with the unknown relative speed. The rendezvous control method comprises the steps that a nonlinear libration point orbit relative dynamic model is established, a finite time convergence differentiator is designed, and finite time convergence preset performance of libration point orbit rendezvousing is controlled. Through a provided finite time convergence preset performance controlling method based on a finite time convergence observer, it can be ensured that a rendezvous system state meets the actual preset performance in the finite time, that is to say, safe and accurate rendezvous between a tracking spacecraft and a target spacecraft can be achieved in the finite time, and a high-precision robust control strategy is provided for the libration point orbit rendezvous task in deep space exploration.

The present invention relates to the field of aerospace technologies, and provides an earth-moon libration point constellation arrangement method, comprising: launching a plurality of satellites to a first zone by using a rocket, if the first zone corresponds to an earth-moon collinear libration point L1, sending the satellites to an L1 orbit to finish arrangement, removing the satellites from the first zone to a second zone, and then correspondingly sending the satellites to an L2 orbit and two earth-moon triangle libration point orbits to finish arrangement, and end the process, wherein both distances between the first zone and L1 and between the second zone and L2 are no greater than 50 thousand Km; and if the first zone corresponds to an earth-moon collinear libration point L2, sending the satellites to the L2 orbit to finish arrangement, removing a part of the satellites from the first zone to the second zone, then sending the satellites to the L1 orbit to finish arrangement, and sending the remaining satellites to the two earth-moon triangle libration point orbits from the first zone to finish arrangement, and end the process, wherein both distances between the first zone and L2 and between the second zone and L1 are no greater than 50 thousand Km. The present invention can reduce arrangement costs of earth-moon libration point constellation.

The invention belongs to the technical field of mineral monomer liberation measurement, in particular to an iron ore dressing product mineral monomer liberation measuring method, which comprises the following detection steps: screening and elutriating dressing products by granularity level, recording granular weight, testing the all-iron grades of the dressing products of all granularity levels, observing dressing products of all granularity levels under a microscope, dividing the dressing products by the area ratio of iron minerals to grain into monomer iron minerals, 7 / 8 iron minerals, 3 / 4 iron minerals, 1 / 2 iron minerals, 1 / 4 iron minerals, 1 / 8 iron minerals, 1 / 16 iron minerals, 1 / 32 iron minerals and monomer gangue minerals, counting the numbers of the mineral grains of all area sections of dressing products of all granularity levels, obtaining an original record of liberation measurement, inputting the weights of all granularity levels, all-iron grades and original data on libration measurement into an original data input interface of iron mineral dressing product libration computing software, computing the theoretical libration values of all granularity levels by using a formula and correcting the actually measured libration J(D) of all granularity levels. The method provided by the invention can process a large amount of libration measurement data quickly, effectively and more accurately.

The invention relates to a current variable compounding stacking rubber supporting rigidity and damp variable passiveness control device that belongs to structure trembling insulated and libration control technology field. The device includes two steel frames, infrared emitter and receiver, electric controlled switch, supercharger and electric working circuit. When the horizontal displacement of the current variable compounding stacking rubber supporting caused by the loading libration is larger then the preset distance, the infrared receiving channel would be cut off, and the electric controlled switch is power on. The high voltage would inflict on the steel board and the state of current variable liquid would be changed to supply additive rigidity and damp. The invention is simple structure, small volume and no energy consumption.