158results about How to "Isolation impact" patented technology

The invention discloses a permanent magnetic direct-drive type offshore wind power plant grid-connected system topology structure and a control method thereof. A grid-connected system comprises a DC bus current collection type wind power plant, a wind field network-side converter station, a dual-stage boost transformer, an offshore rectification station, a seabed DC cable, a shore inversion station, a grid-connected side boost transformer and a land power grid which are successively connected, wherein the DC bus current collection type wind power plant employs a DC bus current collection topology structure and comprises multiple groups of wind turbines which are successively connected, a permanent magnetic synchronous generator, a machine-side rectifier and a DC bus for current collection. The control method is that the machine-side rectifier employs dual-closed-loop control of a rotating speed outer loop and a current inner loop, the wind field network-side converter station employs dual-closed-loop control of a voltage outer loop and the current inner loop, the offshore rectification station employs control of fixed AC voltages and fixed frequencies, and the shore inversion station employs dual-closed-loop control of fixed DC voltages and fixed reactive power. According to the invention, multi-machine parallel-connected operation can be realized, the electric energy conversion efficiency is improved, and the grid-connected AC harmonic quantity is reduced.

The embodiment of the invention provides a Web service simulating method and system and service agent system thereof. The Web service simulating method and system and service agent system thereof are used for solving the problem that a research and development test is interrupted or online services can not be normally provided due to the fact that a service providing system breaks down. The Web service simulating method includes the following steps that the service agent system is used for intercepting a calling request message sent by a service calling terminal, the calling request message is analyzed and a simulation manner corresponding to a method which is requested to be called by the calling request message is found out; if the research result is a full-simulation manner, the service agent system generates a responding message and returns the responding message to the service calling terminal; if the research result is a partial simulation manner, the service agent system forwards to the calling request message to a service providing system. After the responding message returned by the service providing system is received, the received responding message is processed and returned to the service calling terminal. The Web service simulating system comprises the service agent system and the service providing system.

The invention, which relates to the field of aircraft model identification technology, discloses an aerodynamic derivative identification method and system based on a wind tunnel free-flying test so that the flying state of the aircraft can be simulated truly and thus an accurate aerodynamic derivative is obtained. A wind tunnel free-flying test system is arranged and is used for carrying out freedom releasing testing on an aircraft model to obtain testing data; the obtained testing data are analyzed to obtain attitude and angular velocity information of the aircraft; a corresponding dynamic model is established and unknown parameters of the model are determined; according to an output error method based on a maximum likelihood method, state quantity values being corresponding attitude angle and angular velocity values as well as attitude angle and angular velocity values obtained by testing are substituted into an objective function and a derivative, iterative calculation is carried out, the objective function is optimized continuously and thus the derivative reaches a minimum value, and the unknown parameter value is determined to be an identification result. The identification process is simple; the model precision is high; and the convenience of model parameter acquisition is improved.

The invention discloses a three-dimensional integrated front-face wind-feeling heat type wind speed and direction sensor device and a packaging method. The device comprises a heat type wind speed and direction sensor in a front-face wind-feeling mode, a CMOS circuit chip and a printed circuit substrate. The heat type wind speed and direction sensor comprises a low-heat-conductivity substrate (with heat conductivity lower than 1W/m K). A heating element, a temperature measurement element and a bonding pad are arranged on the front face of the substrate, a passivation protection layer is deposited on the front face of the substrate to achieve front-face wind feeling, and the heating element, the temperature measurement element and the bonding pad are sealed with the passivation protection layer. The CMOS circuit chip is arranged between the back face of the substrate and the printed circuit substrate, a through hole corresponding to the bonding pad in position is formed in the substrate and the CMOS circuit chip, the through hole is filled with a metal substance, and the two ends of the metal substance are connected with the welding points on the bonding pad and the printed circuit substrate respectively. The packaging structure and method can obtain high reliability and the high integration level.

The invention discloses a construction method for a high side slope of loosen and calaclastic rock. According to the method, the loosen and calaclastic rock is pre-reinforced by grouting to form into a solidified composite layer which effectively isolates influence of blasting shock waves to the slope and the rock behind the slope when subsequent blasting excavation is performing, and thus the completeness of the slope is improved and the stability of the side slope is increased; meanwhile, after the construction of first-level side slope is completed, the slope is immediately supported by cable anchors, so that the stability of the first-level side slope is well controlled, disturbing influence of presplitting blasting in the excavation of next level of side slope to the upper level of side slope is reduced at the same time, and engineering accidents are avoided. According to the stable excavation method employed by the invention, excavation is performed after the slope is pre-reinforced, and supporting is performed immediately, so that the first-level side slope is reinforced and supported at one time, the construction efficiency is improved, and the construction cost is saved.

A fault tolerant topology structure of a high-speed rotor inverter of a magnetic suspension control torque gyroscope is mainly composed of a Buck DC-DC converter with a redundancy tube, a four-leg phase redundancy inverter, a fault protection circuit, a small armature and inductance permanent magnet brushless DC motor and the like. According to the characteristics of the small armature and inductance permanent magnet brushless DC motor, the redundancy topology structure is designed based on a motor drive circuit with the Buck DC-DC converter and a three-phase full-bridge inverter, reliability of a high-speed rotor drive circuit of the magnetic suspension control torque gyroscope is improved, and fault tolerant control is achieved after a power tube is disconnected or short-circuits; meanwhile, a drive system has the advantage of low power consumption before and after a fault happens, and the structure has high application value for spacecrafts paying attention to low power consumption and high reliability.

The invention provides an equal-arm-length heterodyne laser interferometry ranging system at least comprising a vibration isolation system, a vacuum system, a light source system, an interference system, and a phase monitoring and data analysis system. The vibration isolation system is used for isolating and filtering external low-frequency noise to eliminate system vibration noise. The vacuum system is used for reducing thermal noise caused by system temperature fluctuation. The light source system is used for providing two high-stability high-stable-frequency laser beams which have corresponding differential frequencies. The interference system is used for generating two equal-arm-length heterodyne interference signals and acquiring the information of displacement change between two tested objects according to the displacement and phase relationship. The phase monitoring and data analysis system is used for phase detection for the interference signals, acquiring phase information, inverting displacement, and indicating ranging precision of the interference system under each frequency. The equal-arm-length heterodyne laser interferometry ranging system has the advantages that frequency instability of the laser can be eliminated, the influence of various noise sources upon the ranging precision can be eliminated, and long-period picometer-level measurement precision is realized.

The invention relates to a primary mirror installing and adjusting mechanism, which comprises a support base, a primary mirror base, a connection assembly for connecting the primary mirror base with the support base and a primary mirror flexible support device arranged on the top surface of the support base and connected with a foundation, wherein a primary mirror is fixed in the primary mirror base through a pressure ring; a glue injection hole is formed in the primary mirror base; a glue guide ring is arranged between the primary mirror base and the primary mirror; the glue guide ring is communicated with the glue injection hole; the primary mirror base and the support base are concentrically arranged; the connection assembly comprises a primary mirror base insert embedded on the primary mirror base, a support base insert embedded on the support base, a spring arranged between the primary mirror base insert and the support base insert, and an adjusting screw connected with the support base and the primary mirror base; one end of the spring is fixed on the primary mirror base insert; and the other end of the spring is fixed on the support base insert. According to the invention, the technical problems of complexity and poor stability in the traditional adjustment manner can be solved. The adjusting mechanism provided by the invention has a simple and convenient adjustment manner and is capable of adjusting in six degrees of freedom without influence on the shape of the primary mirror surface shape.

A primary mirror flexible support mechanism relates to a primary mirror flexible support mechanism. The mechanism is provided to solve the problem of the existing primary mirror support mechanism, namely, the existing mechanism cannot isolate outside temperature change and has alignment error, the axial support component mechanism and the radial support mechanism interfere with each other as the pitch angle changes, and thus, the surface shape of the primary mirror is affected. The primary mirror flexible support mechanism comprises a support base, an axial support component supporting a primary mirror, a tensile component glued onto the back of the primary mirror, a radial support component glued to the center of the primary mirror, and a protective component. The radial support component comprises a flexible mandrel adhered into the center hole of the primary mirror, a center cylinder installed in the middle of the support base through spigot fitting, and a flexible diaphragm arranged between the center cylinder and the flexible mandrel. The protective component comprises an O-shaped rubber ring and a protective ring. The problem that the primary mirror may be broken due to overturn after failure of the axial support is prevented. The protective device ensures that the primary mirror can be protected under certain amplitude of vibration.

The invention discloses an optical measurement system. The optical measurement system comprises a light source, a first optical unit, a second optical unit, a dispersion element, a linear array detector, an area array detector and a main control system. A light beam emitted by the light source is transmitted by the first optical unit, then the emitted light beam is split by the second optical unit, and a light beam penetrating through the second optical unit is focused on a measured object along the optical axis direction. The light beam reflected or scattered by the measured object is partially reflected by the second optical unit and then is focused on the dispersion element, the front surface of the dispersion element reflects part of light beams before dispersion to the linear array detector, and part of light beams penetrating through the front surface of the dispersion element are focused on the area array detector. The light waves at different angles correspond to different imaging heights, and the main control system decodes the information of the measured object according to a pre-stored algorithm. According to the invention, the gray level image and the height informationof the measured object can be obtained at the same time, the complexity of the system is reduced, and the stability is improved.

The invention relates to a flexible primary mirror supporting device. The primary mirror comprises two supporting plates, and a plurality of supporting rods arranged between the two supporting plates, wherein each supporting rod comprises a middle rod, two connecting rods arranged at two end parts of the middle rod, and flexible transitional components arranged between the connecting rods and themiddle rod; each flexible transitional component comprises a transitional block, an end part connecting plate and a middle connecting plate; the end part connecting plate and the middle connecting plate are parallel to the axial line of the middle rod and are perpendicular to each other; the other ends of two connecting rods are fixedly connected with the corresponding supporting plates; two L-shaped through slots are formed between the transitional block and the end part connecting plate and the connecting rod; two L-shaped through slots are formed between the transitional block and the middle connecting plate and the middle rod; L-shaped through slots are filled with elastic damping cushions. The technical problem that the primary mirror supporting device cannot isolate the influence ofexternal environment and an installing base on a primary mirror is solved; and through the flexible transitional components, the influence of the structural deformation of the installing base and a heat flow on the primary mirror can be effectively isolated.

The invention discloses a damping pipeline system based on friction energy dissipation and belongs to the technical field of structure damping engineering. The damping pipeline system comprises a pipeline, an inner pipe clamp, a friction energy dissipation layer, an outer pipe clamp and damping supports. The inner pipe clamp is fixed to the pipeline through bolts. The friction energy dissipation layer is arranged between the inner pipe clamp and the outer pipe clamp. The pipeline system is fixed to a structural element through the damping supports. Under an earthquake load, the damping supports provide supporting rigidity for the pipeline system, a friction energy dissipation material serves as the damping energy dissipation layer of the pipeline system and dissipates input earthquake energy, the earthquake acceleration of the pipeline system is decreased, and earthquake internal force of the pipeline system is reduced. The damping pipeline system is simple in structure, convenient touse, low in cost, remarkable in damping effect, and capable of reducing the earthquake internal force of the pipeline system as well as isolating influences of power pipeline vibration on the structural element.

The invention relates to a navigation mark power circuit with topology structure, stable power, and high application. The invention is characterized in that the power supply of function circuit uses LDO as controllable method, using high-efficiency DC-DC-a, DC-DC-b modules and two high-efficiency LDO-a, LDO-b, assisted with a GPRS/GSM communication module and a GPS module, via relative control circuits to form a navigation mark power circuit with high power stability and high application. The invention can insulate the effect of external power supply on the system power, with high power conversion, which can be used in accumulator power supply with various voltages. The invention can improve the interference resistance of terminal, restrain high-order harmonic wave generated in the DC-DC circuits, provide stable power to following circuit and confirm the accuracy of analogue-digit conversion, and support various working modes and low-power-consumption of terminal.

The invention provides a rapid measurement circuit of a two-dimensional resistive sensing array. The rapid measurement circuit includes a two-dimensional resistive sensing unit array sharing row lines and column lines, a column multipath selector and a scanning controller, one end of each resistive sensing unit in the two-dimensional resistive sensing unit array is connected with a corresponding row line, the other end is connected with a corresponding column line, one end of the resistive sensing unit R<ij> is connected with the y<cj> end of the column multipath selector, the ac1, ac2,..., acN ports of the column multipath selector are connected with test voltage Vin, the scanning controller outputs a scanning control signal to control the column multipath selector, the rapid measurement circuit also includes M rows of resistance sampling circuits to perform one-time measurement on M resistive sensing units in the two-dimensional resistive sensing array, the M rows of resistance sampling circuits include M resistance sampling circuits, and correspond to M rows of the two-dimensional resistive sensing unit array, and each resistance sampling circuit includes an operational amplifier A<mpi> and a resistor R

. The rapid measurement circuit of the two-dimensional resistive sensing array can realize rapid detection.

The invention relates to a two-axis pod system based on geographic coordinate system pointing control. The two-axis pod system comprises a two-axis pod structure system, a measuring and control unit, a transmission system and a ground monitoring station, wherein the two-axis pod structure system is composed of a base plate, an azimuth frame and a pitching frame and is used for bearing a high-precision automatic driverscope and remote-sensing load; the measuring and control unit is composed of the high-precision automatic driverscope, a coded disc, a pitching motor and drive board and an azimuth motor and drive board and realizes measurement and control of a remote-sensing load visual shaft under a geographic coordinate; the transmission system is composed of a data transfer radio station and an image transfer radio station and realizes the real-time transfer of two-axis pod system data and remote-sensing load images; the ground monitoring station is composed of a data transfer receiver, an image transfer receiver and a ground display terminal, displays the angular information of the remote-sensing load of the two-axis pod system under a geographical coordinate system in real time and transmits a control command to the two-axis pod system according to task demands. According to the two-axis pod system provided by the invention, direct control is performed based on the pointing information of the remote-sensing load visual shaft under the geographical coordinate, so that the control precision of the two-axis pod system in an more-disturbing environment is ensured; the two-axis pod system is low in cost and convenient to apply and has important engineering values.

The invention discloses an intelligent collaborative transaction mode of a block chain, and relates to the technical field of block chains. The mode comprises a collaborative transaction chain and a collaborative transaction state recording block, wherein the collaborative transaction chain is an independent intelligent contracted main chain, all collaborative transactions are deployed on the collaborative transaction chain, the collaborative transaction state recording block is generated by deriving when each collaborative transaction occupies a transaction record in a block while the collaborative transactions are deployed by the collaborative transaction chain, data of the collaborative transaction state recording block is gradually increased along with execution of the collaborative transactions, each time the operation is executed, the collaborative transaction skips a state, and a record is added in the intelligent transaction state recording block, and the record itself comprises a hash check value of the front state and a signature of an executor. According to the mode provided by the invention, the main chain block space is effectively saved, the influence on the collaborative transaction chain block is isolated when the collaborative transaction state recording block is changed, the extremely complex state machine can be supported, almost all commercial scenes can bemet, and the execution and query efficiencies can be greatly improved.

The invention discloses a large area penetrating goaf bag-type filling treating method by areas and by steps. The filling treating method comprises the following steps that a, according to the occurrence situations of a goaf and ore pillars, the goaf is divided into partitions to be filled and blank leaving partitions; b, strip-shaped bag-type filling blocking walls are constructed on the outer periphery of the partitions to be filled; c, the partitions to be filled are filled by steps according to treating orders; and d, filling treating by areas and by steps of the goaf is completed. The technical problems that the blocking and filling treating process of the large area penetrating goaf cannot be controlled, the filling quality is poor and the treating effect is poor are solved. The potential safety hazard of the large area goaf can be eliminated by steps; the influence of the goaf on the earth surface and regional geologic environment can be controlled, and safety accidents caused by the goaf are avoided. The filling treating method is suitable for treating of large area penetrating goafs, especially for gently-inclined ore bodies, and treating of goafs exploited through a room-and-pillar method and a comprehensive method.

The invention discloses a low-vibration low-temperature testing device. The low-vibration low-temperature testing device comprises a vacuum chamber provided with an opening, an optical vibration isolation platform used for fixing the vacuum chamber and isolating the vacuum chamber from external vibration, a G-M refrigerating machine, a corrugated pipe, a sample to be cooled, and a flexible cold guide belt; the G-M refrigerating machine is composed of a refrigerating machine main machine and a refrigerating head assembly, and the refrigerating head assembly is composed of a refrigerating head and a refrigerating head pedestal; the end parts of the corrugated pipe are connected with the opening of the vacuum chamber and the refrigerating head pedestal respectively in a sealing manner; a sealed vacuum space is formed by encircling of the corrugated pipe, the vacuum chamber, and the refrigerating head assembly; the refrigerating head is arranged in the sealed vacuum space; the sample to becooled is arranged in the sealed vacuum space, and is arranged in the vacuum chamber using a sample support; the flexible cold guide belt is arranged in the vacuum space, and the end parts of the flexible cold guide belt are connected with the sample to be cooled and the refrigerating head through hot connection. The low-vibration low-temperature testing device is capable of avoiding direct contact of the refrigerating head and the sample to be cooled, and reducing influences of vibration on samples effectively.

The invention discloses a microvibration prevention building structure and a constructing method thereof. Multiple microvibration prevention measures are taken, and the method comprises the steps that environmental vibration testing and geological exploration are carried out on a planned site in an early stage, and a plot which is away from main lines of communication and away from factories having large machinery is selected; and the anti-microvibration rigidity of a building is enhanced by constructing structures, such as pile foundations, raft foundations, densified column nets, dense-hole floors and microvibration prevention walls. A power area, support areas and a production area are separated, and block-by-block and layer-by-layer pouring and vibration are carried out on concrete structures, such as ultra-thick and large-size rafts, the dense-hole floors and the microvibration prevention walls during construction, so that quality of concrete is ensured, the production plant building meets the anti-microvibration requirement of precision production equipment, the traditional thinking mode that anti-microvibration can only be performed from certain aspect is changed, for example, vibration isolators or other vibration isolation devices can be installed on precision equipment, and thus the microvibration prevention building structure has certain reference and enlightening significances for people constructing other similar buildings in the future.

The invention discloses a damping vibration attenuation metacentric-type electric spindle centrifugal machine and aims at solving the problems that a motor rotor of an existing chemical fiber and textile fiber centrifugal spinning electric spindle centrifugal machine is in a rigid connection with a centrifugal spinning pot of the existing chemical fiber and textile fiber centrifugal spinning electric spindle centrifugal machine, and in the process of starting, normally operating and stopping of the electric spindle centrifugal machine, the factors such as manufacturing and installation of the centrifugal spinning pot, and spinning and spindle forming of the fiber in the centrifugal spinning pot cause dynamic unbalanced inertia moment to influence normal operation of equipment and even damage the equipment. The damping vibration attenuation metacentric-type electric spindle centrifugal machine comprises a base, an electric spindle shell body, the motor rotor, a hollow output shaft, a cone-shaped central spindle, the centrifugal spinning pot and an upper back-up bearing. On the premise of fully retaining the advantages of the existing electric spindle centrifugal machine, the damping vibration attenuation metacentric-type electric spindle centrifugal machine is capable of effectively improving reliability of equipment operation, prolonging service life, reducing power loss and energy consumption, improving the comprehensive performance index of the equipment through adoption of an improved structure, and effectively solves the problems of fatigue bearings, short service life, large energy consumption, high damage rate and high manufacturing cost, and the like of the existing electric spindle centrifugal machine.

The present invention discloses a test device of satellite-borne flywheel disturbance vibration force test in a vacuum environment. The device comprises a plurality of air vibration isolators, a marble mass block, a support device, force sensors, a production installation table board, a vacuum tank and the like. The air vibration isolators are configured to support the marble mass block, the top portion of the marble mass block is configured to support the vacuum tan and is provided with the vacuum tan, the internal portion of the vacuum tan has a certain vacuum degree, the force sensors are arranged at the bottom portion of the internal portion of the vacuum tank, the force sensors are configured to test micro disturbance generated by a satellite-borne flywheel disturbance source above the installation table board, the disturbance vibration generated when the satellite-borne flywheel disturbance source works is transmitted to the force sensors through an installation board and then istransmitted to a signal processor connected with the force sensors, and a data collector performs signal collection. The device provided by the invention performs test of the flywheel output disturbance vibration force, a test result is more accurate and is close to the actual work state of the flywheel, and the data more has the guiding.

The invention relates to a power battery protection structure of a new energy automobile. The structure comprises a voltage regulating mechanism and a fireproof mechanism which are arranged on a battery bin; the pressure regulating mechanism and the fireproof mechanism are both connected to a central controller; the pressure regulating mechanism comprises a standard part, a differential pressure sensor, a pressure release valve and a filter; the fireproof mechanism comprises a fire extinguisher connected with the battery bin and at least one composite detection unit arranged in the battery bin; each composite detection unit comprises a microprocessor as well as a temperature sensor, a smoke sensor and a CO sensor which are in communication connection with the microprocessor. The inventionaims to solve the problems in the prior art. The power battery protection structure of the new energy automobile performs multi-directional monitoring and real-time monitoring on air tightness and fire in the battery bin, timely gives an early warning and an alarm when a fire occurs, avoids missed alarms, reduces false alarms, timely and automatically extinguishes the fire, effectively controls the fire, and maintains the stability of the air pressure in the battery bin.

The invention discloses a protective film for an STP building exterior wall thermal-insulation fire-retardant material. The protective film comprises an aluminum-coated glass-fiber gridding cloth layer, an aluminum layer, a polyester (PET) layer, a two-way stretch nylon layer, an aluminum layer, a two-way stretch nylon layer and a compound polyethylene layer which are respectively arranged from outside to inside. Compared with the prior art, the protective film for the STP building exterior wall thermal-insulation fire-retardant material comprises the following characteristics that a flexible packaging material is good in smoothness effect and excellent in barrier effect and ageing resistance. The protective film disclosed by the invention is packaged outside a panel, and thus, not only is a protection function performed but also the barrier effect is performed on cement and adhesives, and the barrier effect is performed on temperature and noise.

A linear encoder consists of a master grating rule, a sliding body with two sleeve initial cuts, an indication grating rule, a circuit box and two groups of constrict connection mechainsm which comprises a ball bead, a cylindrical sleeve, a compression spring and spring steel wire. The contact between initial cuts and connection mechanisms is either contact of cylinder and plane or contact of ball and plane for decreasing frictional force.