608results about How to "Reduce design requirements" patented technology

The present invention is a double-layer multi-carrier ultra-wideband wireless communication method, wherein the frequency band for ultra-wideband communication is divided into a plurality of sub-bands, then one or more sub-bands are used for data transmission, and the Orthogonal Frequency Division Multiplex (OFDM) multi-carrier transmission technology is used in each sub-band. In the transmitting party, the data symbols to be transmitted are allocated on M branches corresponding to the M sub-bands, and the OFDM modulation is implemented on the data symbols on each branch to obtain M branches of parallel data, then digital baseband multi-carrier modulation is implemented on the M branches of parallel data. Thereby, the spectrum of data on each branch is moved onto the digital sub-band corresponding to the radio sub-band one to one, so the digital baseband signal of the radio signal to be transmitted is obtained. Then, the digital signal is converted to an analog signal with a D/A conversion and an up-conversion, and the signal spectrum is moved to the radio frequency band in use, then the analog signal is amplified, filtered and transmitted via an antenna, thus the task of modulating M branches of parallel data onto M sub-bands is completed.

The invention comprises: a switching unit and at least two switch control units. Said switching unit comprises a switching module with at least two uplink ports respectively connected to the root multiplexer of the control units. Said switch control units are used to control said switching module to turn on or turn off.

The invention discloses a supercritical fluid dyeing machine. A horizontal type cylindrical dyeing kettle, a magnetomotive cloth lifting wheel, a spray cavity, a wave-shaped cloth guide passage in the dyeing kettle, a heat exchanger, a dye kettle or/and an entrainer kettle and a circulating pump are used as main components to form a dyeing circulation system; and both ends of a fan are respectively connected with fluid outlets under the spray cavity and the dyeing kettle and form a cloth feeding system together with the magnetomotive cloth lifting wheel, the spray cavity and an operating opening. A rope-shaped fabric realizes circulated dyeing under the common action of the fluid in the magnetomotive cloth lifting wheel and the spray cavity, and the fluid in the dyeing kettle carries out forced circulation by the circulating pump. The dye and the fluid can realize recycling by a separating and recycling system after dyeing, and the whole dyeing circulation system and the separating and recycling system are clean to achieve the requirement during color changing and dyeing. The supercritical fluid dyeing machine can realize anhydrous dyeing processing on the fabric in a loosening type tension-free state without the production and discharge of pollutants, and has the characteristics of ecology, environmental pollution, wide adaptability of fabric variety, and the like.

The invention relates to a drive train (10) for a hybrid vehicle comprising an internal combustion engine (12) having a motor shaft (18) for providing a torque for driving the hybrid vehicle, and comprising an electric machine (30) for providing a torque for driving the hybrid vehicle, wherein the electric machine (30), in particular for starting of the internal combustion engine (12), can be coupled to the motor shaft (18) by means of a selectively engageable planetary gear unit (38) for providing at least two different transmission ratios, wherein the electric machine (30) can be coupled by means of a transmission gearing (48), in particular a sun gear system having a transmission ratio different from 1.0, having an intermediate shaft (46) for introducing the torque into the planetary gear unit (38).

The invention discloses a multi-AGV dispatching system based on a unidirectional and bidirectional mixed path. Each guide track is provided with two identification cards, each path node is provided with an identification card as an execution card, RFID readers installed on AGVs read identification card information and upload the information to a master control system, the positions of the AGVs are determined according to electronic tag information, then according to task allocation, an offline path is obtained through an A* algorithm and is sent to the AGVs, the positions of the AGCs are monitored on line in real time, and conflicts among the multiple AGVs are prevented through a point-side anti-conflict algorithm.

The invention discloses a method for driving displaying of a display unit through analog and digital hybrid drive. The method comprises the following steps that analog drive quantity controls the illumination brightness of the display unit; under the illumination brightness, digital drive quantity controls the illumination time of the display unit. The combination of the illumination brightness and the illumination time controls the illumination of the display unit, the rich gray scale and color are realized, the gray scale and color gradation expression ability of an image is obviously improved, the display of high contrast and high dynamic range is realized, and meanwhile, the system power dissipation and design requirements of a drive chip are reduced. The invention further discloses asystem for driving displaying of the display unit through analog and digital hybrid drive, and a drive circuit adopting analog and digital hybrid drive.

The invention discloses a capacitor coupling noncontact conductance measurement device and method. The device comprises an alternating-current excitation source, an insulated measurement pipeline, an excitation electrode, a detection electrode, a range resistor, a virtual inductor, a differential amplifier module and a signal processing module, wherein one end of the virtual inductor is connected with the range resistor, while the other end is grounded, meanwhile, two ends of the range resistor are connected with the differential amplifier module. The virtual inductor substitutes an actual inductor, thus effectively overcoming the adverse effect of a coupled capacitor on the measurement result according to the series resonance principle. The virtual inductor is a grounding inductor, and compared with a floating inductor, the virtual inductor is good in working stability and simple in circuit structure; compared with an actual inductor, the virtual inductor capable of adjusting the equivalent inductance value reduces the requirement for the frequency of the excitation source. In addition, different from a noncontact conductance measurement method adopting a current method, the capacitor coupling noncontact conductance measurement method adopts a voltage method to obtain the equivalent conductance value of measured conductive fluid, thus providing helpful reference for solving the conductance measurement problem of conductive fluid in a pipeline.

The invention discloses a current sharing control method for synchronously driving a parallel-connection power module converter and a current sharing controller and relates to the field of power electronic power conversion. A software current sharing method is used for overcoming shortages in an existing parallel-connection converter hardware current sharing method. According to the technical scheme, the method comprises the steps that the step 11, average currents output by the converter and currents output by a power module are collected; the step 12, inductive current control processing is conducted on the average currents output by the converter and the current output by the power module, and therefore drive correction parameters are obtained; the step 13, time correction processing is conducted on the drive correction parameters and the currents output by the power module, and therefore drive correction time is obtained; the step 14, the duty ratio of a synchronous PWM drive signal of a master controller of the power module is corrected according to the drive correction time, and therefore a module drive signal of the power module is obtained; the step 15, the module drive signal is used for controlling a power unit of the power module, and therefore the currents output by the power module are adjusted.

The invention relates to a method for calibrating the geometrical parameter error of an industrial robot based on a two-step method. A calibration coordinate system is established and comprises a measuring coordinate system and a constraint coordinate system, an error model is established according to the interconversion relationship between a robot connecting rod coordinate system and the calibration coordinate system, and thus the preliminary calibration result of a conversion matrix between the robot connecting rod coordinate system and the calibration coordinate system is obtained; and then the preliminary calibration result is utilized to establish an error correction model including the robot connecting rod geometrical parameter error and the conversion matrix error between the robotconnecting rod coordinate system and the calibration coordinate system according to a differential perturbation method, the corrected robot geometrical parameter error is obtained, and the calibration method is simple and precise.

The invention provides a method for distributing temporary-storage goods, a temporary-storage goods cabinet and an enterprise terminal system. According to the method, the enterprise terminal system distributes the temporary-storage goods cabinet and corresponding storage lattices for goods in an order according to order information of a user, and goods numbers of the goods and identifications of distributed storage lattices for the goods are sent to the temporary-storage goods cabinet, so that after the temporary-storage goods cabinet receives distribution information of the enterprise terminal system, the storage lattices where the goods need to be stored can be directly determined, the temporary-storage goods cabinet does not need complex distribution rules for storage and calculation capacity based on the distribution rules, the design requirement and design cost of the temporary-storage goods cabinet are lowered, and meanwhile corresponding goods cabinet addresses and storage lattices of corresponding specifications can be selected for goods bought by the user according to actual requirements of the user, and better online shopping experience is provided for the user.

The invention discloses a working medium contact cooling system of power batteries. An insulating liquid heat-conducting working medium is contained in a working medium box; a working medium pump sinks into the insulating liquid heat-conducting working medium; a filter is arranged at an inlet of the working medium pump; the working medium pump is connected with a spray main pipe; a plurality of spray branch pipes are connected with the spray main pipe in parallel; each spray branch pipe is provided with a plurality of nozzles; the nozzles are opposite to a high-power battery pack; the spray branch pipes and the spray main pipe form a cage frame; the high-power battery pack is placed in the cage frame; the spray branch pipes are distributed on the side surfaces and the upper part of the high-power battery pack to form a relatively open spray structure; and the insulating liquid heat-conducting working medium is a nonpolar substance and is free of a phase change in the spray process. The invention further provides a working method of the working medium contact cooling system of the power batteries. According to the working medium contact cooling system, the cooling structure is reasonable and the cooling efficiency is high.

The invention provides a wave-front sensor and corrector aligning device in a self-adaptive optical system, which consists of a wave-front sensor, a wave-front recorder, a wave-front corrector, an electric control transverse moving table, a position mismatching evaluating device, a transverse moving table controller and a computer, wherein the electric control transverse moving table can transversely move and rotate, the position of the wave-front corrector is marked in a mode of exerting the voltage to an independent unit of the wave-front corrector through the computer, and the position mismatching between the wave-front sensor and the wave-front corrector is measured through the self wave-front detection capability of the wave-front sensor. Light beams enter the wave-front sensor through being reflected by the wave-front corrector, the face shape information of the wave-front corrector detected by the wave-front sensor is recorded by the wave-front recorder, the position mismatching evaluating device carries out the calculation according to the recorded information of the wave-front recorder and outputs the position mismatching data into the transverse moving table controller, and finally, the transverse moving table controller is used for controlling the electric control transverse moving table for completing the position regulation of the wave-front sensor. The invention can accurately align the positions of the wave-front sensor and the wave-front corrector, can greatly improve the aligning precision and the aligning efficiency of the wave-front sensor and the wave-front corrector, and can ensure the wave-front control capability of the self-adaptive system.

The invention provides a MMC (modular multilevel converter) sub-module capacitor voltage fluctuation suppression method with harmonic coupling injection. The method comprises the following steps: inhibition of fundamental frequency and second harmonic generation fluctuation components of bridge arm instantaneous power is taken as a target; the injection amounts of the second harmonic generation loop current and the third harmonic generation voltage are optimally designed; and finally, the calculated second harmonic generation ring current and third harmonic generation voltage are injected intothe three phases through an injection controller, so that the voltage fluctuation of a sub-module capacitor of a whole converter valve is reduced, the requirement on the capacitance value of the sub-module capacitor is reduced, the size and the cost of the sub-module capacitor are reduced, and the light weight of the modular multilevel converter is favorably realized.

The invention relates to a detection apparatus for a neutron flux and a temperature of a reactor core. The detection apparatus comprises an assembly housing, a self-powered neutron detector set, an internal sealing structure, a connector and a terminal portion sealing plug, wherein the self-powered neutron detector set is fixed inside the assembly housing and comprises N self-powered neutron detectors, the N self-powered neutron detectors are uniformly arranged at intervals from bottom to top along the axial direction of the assembly housing, the connector is sealedly fixed on the upper end of the assembly housing, the terminal portion sealing plug is sealedly fixed on the lower end of the assembly housing, the internal sealing structure is sealedly fixed in the internal of the assembly housing positioned above the self-powered neutron detector set, and the armoured cables of the N rhodium self-powered neutron detectors are bundled up and fixed, upwardly extend along the axial direction of the assembly housing, penetrate through the internal sealing structure, and finally are fixed on the pin of the connector. According to the present invention, the neutron flux change of the reactor core can be rapidly responded, the reactor core neutron flux and the fuel assembly outlet temperature can be real-timely measured, and the design requirements of the transmission cable can be reduced.

The invention belongs to the mechanical manufacture field and relates to a parallel 3-DOF drive mechanism of a spindle head. A fixed platform is provided with 3 drive moving pairs distributed according to the position of the apex of an equilateral triangle; each drive moving pair is connected with an input member bar which is driven by the drive moving pair; the other end of the input member bar is connected with a globe hinge and is connected with link blocks via the globe hinge; a movable platform is provided with 3 uniformly aligned driven moving pairs which are chutes; 3 link blocks are respectively installed in the chutes of the driven moving pairs and can move horizontally in the chutes; a spindle is arranged in the central position of the movable platform. By adopting parallel structure, the drive mechanism obviously improves the rigidity of the spindle head structure; in addition, the drive mechanism has the characteristics of having small movement mass, good dynamic property and high movement precision, moving and decoupling along the moving direction, and is suitable for independent working and combined machining in coordination with other devices.

The invention discloses a method and kit for realizing multiple detection of nucleic acid through a colloidal gold chromatographic technology, and belongs to the field of medical biotechnology. The invention provides a nucleic acid detection test strip, a universal probe is marked with colloidal gold particles to be fixed on a glass cellulose film, the universal probe is designed into a universal sequence, an NC film on the test strip have one or more detection lines and a quality control line, each detection line is coated with a section of nucleic acid sequence which can be in specific hybridization combination with a corresponding specific probe B series; the quality control line is coated with a section of nucleic acid sequence which can in specific hybridization combination with a specific probe A series; the specific probe A series is in complementary pairing hybridization with the universal probe; the probe marked with gold and a nucleic acid amplified fragment are combined in series by virtue of the specific probe A series and the specific probe B series, so that the specific detection of the nucleic acid fragment can be realized. The method has the advantages that the technical requirements of experimenters are low, the required detection time is short, special instruments are not required, and the method is easy to popularize towards grass-roots and remote countryside medical institutions.

The invention relates to a red-tide living thing image automatic identifying device and method, provided with a LED, a light source lens, a mobile room, an objective, a depth of focus lens and a camera; the LED is at the focus of the light source lens, the mobile room is between the light source and the objective, and the depth of focus lens is between the objective and the camera. The identifying method: obtaining image, preprocessing, detecting object, separating image, obtaining image feature, classifying and identifying object, and outputting result. It adopts a far-focus objective, adds an operating space between the mobile room and the objective, giving a development space to the mobile room, and increases the application range of the apparatus. It can automatically analyze images, heightening automation degree of the apparatus, and meets the request for field monitoring red-tide living things, hopeful to implement real-time monitoring the generating and disappearing course of the red tide, and on this basis, provides a precaution to the danger degree of the red tide.