79results about How to "Solving synchronicity" patented technology

The invention relates to a design and implementation method of a multi-channel broadband electronic signal synchronous acquiring system, which realizes synchronously acquiring 64 broadband electronic signal array units. The system consists of a high speed AD (analog-to-digital) conversion module, an optical fiber aggregation module, a synchronous signal generating module and an optical fiber ingest card module and the like; the high speed AD conversion module receives a control command from a terminal processor through an optical fiber; an AD acquiring plate acquires data according to the requirement of the control command after receiving the synchronous signal of the synchronous signal generating module. After the acquisition is finished, the high speed AD conversion module transmits the acquired data to the optical fiber aggregation plate and the optical fiber ingest card in sequence, and finally the data is uploaded to the terminal processor through a PCIE (Peripheral Component Interface Express) bus. The method provided by the invention has a wide application prospect in high resolution digital array radar and other fields requiring broadband digital beam synthesis and the like.

The invention relates to a simulation / radio frequency integrated circuit design method based on SPICE software. The method comprises the following steps: (1) determining the demands of the circuit system characteristics on the reliability, and describing the amount of degeneration as a device characteristic function under the condition of the certain stress after some time; (2) adjusting the parameters of components, optimizing a circuit system, finding the key component with great effect on the circuit system characteristics and great effect by the stress, optimizing parameters of the key component, and lengthening the life cycle of the circuit system; (3) using the Monte Carlo simulation of the SPICE to carry out the model simulation on various technological parameters of the system; if the demands on the reliability are not accorded, returning to the step (2), and redesigning the key circuit to satisfy the demands of the system. The method greatly realizes the synchronism of the functional simulation and reliability simulation in the design stage, and the parameters affecting the life cycle are only required to be adjusted when the process is changed.

An integrated circuit comprises a first circuit portion (106) with a JTAG interface (108) and a test access port (110). A second circuit portion (114) has a serial bus interface (112); and a test access control circuit (104) is connected to the JTAG interface (108) via the test access port (110). The first circuit portion (106) is connected to the serial bus interface (112) via the test access control circuit (104) and the test access control circuit (104) is programmable to be in a transparent mode or a test mode in response to a test mode select (TMS) signal from the JTAG interface (108). Thus, there is provided generic access to hidden serial bus interfaces while also maintaining speed performance such that the circuit portion / device under test can still be operated at device specification.

The invention discloses a parallel variable frequency power supply for a high power and high voltage test, and belongs to the technical field of electric systems. The parallel variable frequency power supply comprises two or more parallel variable frequency power supply parts with current limiting reactors. The parallel variable frequency power supply solves the problem that a main variable frequency power supply controller decodes falsely due to the fact that the signal transmission quantity of optical fiber communication is large when two or more power supplies run in parallel; the parallel variable frequency power supply ensures that asynchronism of output voltage of the parallel variable frequency power supplies is controlled within 1 microsecond; the output synchronism of the variable frequency power supplies is improved; and circular current of output among the power supply parts is realized. In addition, as guard signals are arranged among a main variable frequency power supply and slave variable frequency power supplies, the deficiency in the prior art that when remedial operation cannot be conducted when the variable frequency power supplies fail is overcome.

The invention discloses a high-speed parallel D / A clock synchronization apparatus. The high-speed parallel D / A clock synchronization apparatus comprises a signal conditioning unit for adjusting the amplitude size of clock signals, increasing the amplitude of the clock signals to a saturation degree of an amplification unit before a switch unit is energized and then reducing the amplitude after a state is stable so as to enable the amplification unit to work at a linear interval, and the switch unit and the amplification unit. The invention further discloses a high-speed parallel D / A clock synchronization method. According to the apparatus and method provided by the invention, synchronization of a multichannel signal generation system can only be concentrated on on-off of a radio frequency switch, the transition time at the moment when the switch is turned on and turned off is substantially compressed, the influences of errors caused by clock jittering at D / A conversion initial time, and the stability and the reliability are good. On the other hand, by use of the feature of small noise of a radio frequency circuit, low-noise conversion of high-speed clock signals from a single end to a differential is finished, and the application requirement of circuit difference signals can be met.

The invention provides a power transmission line fault location system based on a PMU (phasor measurement unit) and a method, and relates to the technical field of power system fault location. The system comprises a data monitoring layer for classifying and storing measurement information acquired by the PMU and performing fault monitoring, and a fault location layer for analyzing a type of a fault and locating a fault point. The fault location method of the system comprises the steps of allowing the data monitoring layer to judge the fault of a power transmission line and upload relevant nodedata of the faulty power transmission line to the fault location layer, allowing the fault location layer to process the relevant node data of the faulty line to accomplish location of the fault point, calculating an equivalent node where a PMU node is arranged to obtain a position of the fault point, and performing iterative calculation to reduce a calculation error. The power transmission linefault location system based on the PMU and the method solve the problem in synchronism of the measurement information and achieve the quick and effective location and calculation of the fault of the power transmission system.

The invention discloses a low-voltage management system of a distributed battery management system. The low-voltage management system comprises a master control unit, a plurality of slave control units controlled by the master control unit and a group of power supply circuit, wherein the power supply circuit connects the master control unit and the slave control units in parallel to a power supply output end of a finished vehicle controller; a main node and a plurality of branch nodes are designed on the power supply circuit; the main node is connected with the master control unit to directly power the master control unit; any branch node is independently connected to one slave control unit to directly power the slave control unit simultaneously. The synchronism between low-voltage powering on and powering off of the distributed battery management system and the finished vehicle controller is realized, and meanwhile, the synchronism between low-voltage power supply powering on and powering off of each node in the distributed battery management system is realized.

The invention discloses a matrix warping winch observation system, which comprises a shore station system, a mother bomb system and a plurality of submunition systems. The shore station system is connected with the mother bomb system through an umbilical cord cable, and the plurality of submunition systems are carried by the mother bomb system before being released. A mast cartridge system includes a mast cartridge housing, A system control module is arranged on the upper part of the mast cartridge shell, and a air guide cover is arranged at the bottom of the mother shell case, and a first measuring sensor is arranged at the air guide cover, All the submunition systems are uniformly arranged along the circumference of the master shell, a release device for controlling the synchronous release of all the submunition systems is arranged at the middle part of the master shell, and a window for facilitating the submunition system to protrude from the master shell is arranged at a position corresponding to the submunition system on the master shell. The invention provides a method and a device for detecting the data of the whole sea depth space region, which effectively solves the attitude unity and synchronism of the simultaneous release of a plurality of submunition systems, and improves the accuracy of the measurement data of the submunition system.

The invention discloses a microgrid non-destructive island detection method based on harmonic current injection and harmonic impedance measurement. The method comprises the steps of utilizing an FFT algorithm to real-timely measure a harmonic voltage, a harmonic current and a system frequency at a PCC, comparing the harmonic voltage and the system frequency with a preset voltage threshold value and a preset frequency threshold value in real time, and if the harmonic voltage and the system frequency exceed the threshold values, judging as an island state directly; otherwise, utilizing the harmonic voltage and the harmonic current to calculate an equivalent harmonic impedance amplitude and a phase angle, calculating a ratio of the harmonic impedance amplitude to the last harmonic impedance amplitude, judging whether the ratio of the harmonic impedance amplitude is greater than a proportionality coefficient or not, if so, judging whether the impedance phase angle is less than zero or not,and if not, judging as an island. According to the method, the amplitude change and phase change of the harmonic impedance are used as the island detection criteria, so that the island detection accuracy is improved, the island detection can be realized without needing to force the voltage and frequency to exceed the threshold values, and the island detection method is non-destructive.

The invention provides a bridge jacking method. The bridge jacking method comprises the steps of erecting a scaffold operation platform, determining the jacking height of each observation point, installing a displacement control system and an anti-roll device, performing hydraulic system inspection, control system inspection and monitoring system inspection, pressurizing jacks, slowly pressurizingall the jacks and repeating until the jacking height is reached, taking out an original bearing longitudinally along a bridge and along a beam, cleaning a placement position of the bearing and removing litter around the placement position, replacing the original bearing with a new bearing, and lowering the beam.

The invention relates to the technical field of rubber tyre shaping equipment, and particularly provides a two-time radial expanding-type shaping drum which includes a main shaft arranged horizontally, and an adjustable outer back-wrapping mechanism, a positioning disc, an adjustable primary expanding drum cylinder, an adjustable secondary expanding drum cylinder, a position limiting block and anadjustable inner back-wrapping mechanism, which are distributed on the main shaft from the left to right. In the invention, a set of axial two-sectional separated cylinder for driving a drum bush to achieve two-time drum expansion instead of a plurality groups of two-sectional cylinders, so that a problem of synchronism of a plurality groups of drum bushes of cylinders. The number of cylinders isreduced, so that the load on the main shaft is lowered, and the inertia during rotation is lowered too; by introducing a linear guide rail, the circumferential precision is increased, so that producedtyre carcass is improved.

The invention discloses an all-electric ejecting-type super-speed injection molding machine which mainly comprises a mold closing mechanism, an injecting device and a rack. The injecting device comprises a nozzle, a machine cylinder, a heating ring, a screw, a feeding hopper, a hopper seat, a mobile device, a draw bar, a plastifying device, an injecting seat, an ejecting device and an ejecting seat. The nozzle, the machine cylinder, the screw, the hopper seat and the plastifying device are connected with the injecting seat sequentially in an axis aligning way. The ejecting device comprises an electromagnetic ejector and an ejecting sliding block. The tail end of the ejector is fixed on the ejecting seat and is capable of performing relative motion on an ejecting platform along with the injecting device. The ejecting sliding block slides on the electromagnetic ejector and one end of the ejecting sliding block is connected with the injecting seat. During injection, the ejecting sliding block is driven to move forwards by the electromagnetic ejector, so that the injecting seat is driven to move forward and the screw is driven to inject forwards finally. The injection molding rack has the advantages of high responsiveness, saving energy, protecting environment and the like. Thus, the problems of high energy consumption and difficulty in increasing speed of hydraulic-type super-speed injection molding machines are solved. The mechanical mechanism becomes simple and the assembly difficulty is reduced.

The invention discloses a multi-mode immersive synchronous acquisition system based on eye movement tracking and brain function activity detection. The multi-mode immersive synchronous acquisition system includes VR display equipment, the VR display equipment is internally provided with a display module, an eye movement acquisition module, a brain blood oxygen acquisition module and a communication module, the eye movement acquisition module is used for collecting tested eye images, the brain blood oxygen acquisition module is used for collecting a brain oxygen signal of a tested head, and theVR display equipment, the eye movement acquisition module and the brain blood oxygen acquisition module respectively realize data transmission and clock synchronization with external terminal equipment through the communication module. According to the multi-mode immersive synchronous acquisition system, the VR display equipment with virtual immersion experience is adopted in the whole acquisition system, in the whole process of testing and data collection, the interference of the external environment on tested personnel can be completely avoided, meanwhile the multi-mode immersive synchronous acquisition system takes into account simultaneous acquisition of eye movement and the brain blood oxygen signal, data transmission is conducted through the communication module directly with the external terminal equipment, and a clock synchronization mode is adopted to solve the synchronization problem of real-time characteristics and multi-mode signals.

The present invention provides a multi-source heterogeneous data synchronous replaying method, and thus various data can be combined and synchronously replayed according to needs. The method comprises a step of collecting multi-source heterogeneous data, wherein a system adds a time stamp mark in each data packet or data frame in the multi-source heterogeneous data, and the time stamp conversion is carried out, a step of carrying out multi-process collaborative synchronization and realizing multi-source heterogeneous data synchronous replaying, a step of designing a multi-source heterogeneous data replaying process, and a step of controlling multi-source heterogeneous data replaying. According to the method, the synchronous replaying technology of the multi-source heterogeneous data such as a screen video, a radar echo video, a radio / telephone audio and system processing data can be realized, thus various data are confirmed mutually, and the completeness, the accuracy and work efficiency of user event verification analysis are improved.

The invention provides a stairway mold which comprises a base and a step assembly arranged on the base. End molds are arranged at the ends of the step assembly. Side molds are arranged on the upper portion and / or the side faces of the step assembly. The step assembly comprises a plurality of step units. The step units are arranged on the base through adjusting mechanisms and can move and / or rotate on the base. According to the stairway mold of the structure, step panels can rotate by a certain angle relative to the base under the action of the adjusting mechanisms, so that the included angle between the step panels and the base is changed. Meanwhile, the step panels can move by a certain distance relative to the base under the action of the adjusting mechanisms, that is, the distance between every two adjacent step units can be changed, and therefore the aim of producing stairways of different specifications can be achieved by moving and / or rotating the step panels. Therefore, one mold has multiple purposes, the use efficiency of the stairway mold is improved, and the production and action cost is lowered.

A die holding frame for the die press of powder is composed of punch die and its jointer, the upper, external lower, medium lower and internal lower formworks, female and its holder, guide columns, three coaxial annular cylinders, and three annular drive rods associated with said three coaxial annular cylinders. Its advantages are synchronous drive to said formworks, and high quality of workpiece.

The invention discloses a smart home system and a data information coordination and synchronous updating method thereof. A modular design is adopted, and the system comprises a data node module, an acquisition module, a control system, an intelligent gateway, a server and an APP terminal. The data node module comprises all intelligent furniture household appliances, various sensors, monitoring equipment and the like; the acquisition module is a Zigbee wireless sensor network; the control system receives and sends the data information and the control instruction; the intelligent gateway is built between the control system and the server so as to analyze the data and the messages, so that the purpose of data information communication is achieved; the server performs data updating and storage, and pushes a message service to the APP terminal and the intelligent gateway; and the APP terminal displays functional interfaces of control, monitoring, security and protection and the like of thesmart home system to a user. According to the method and the system, the problems of data chaos, discordance, asynchronization and the like caused by simultaneous login and simultaneous operation of aplurality of clients are solved by adopting a mode of login of users with different authorities and a mode of message pushing.

A multi-motor hydraulic synchronous control system adopts an open-loop control system. The open-loop hydraulic synchronous control system has a throttle valve synchronous circuit, a speed control valve synchronous circuit, a diverter valve synchronous circuit, a synchronous diverter (synchronous diverter motor) synchronous circuit, Parallel pumps synchronize the loop. The multi-motor control system has a simple structure, adopts an open-loop control system to achieve high synchronization accuracy, can effectively solve the multi-motor synchronization problem, and has certain practical application significance.

The invention provides a profiling track rubber tapping device. The profiling track rubber tapping device comprises a profiling rubber tapping track part and a tool rest part, and the profiling rubber tapping track part comprises a profiling rubber tapping track and a track-imitating rack; the track-imitating rack is fixedly installed in the middle of the inner side of the profiling rubber tapping track 11, and the profiling rubber tapping track 11 plays a guiding role so that the tool rest part 2 can move along the profiling rubber tapping track 11 to achieve rubber tapping operation. The profiling rubber tapping track imitates a cutting line of manual rubber tapping to be in a spiral-like shape. According to the profiling track rubber tapping device, the difficulty of manual rubber tapping and the limitation of a'one-machine-one-tree 'type rubber tapping device is overcomed to a certain extent, and is suitable for rubber trees with different diameters and uneven places on the surfaces of tree bodies; during rubber tapping operation, an upper computer controls a mechanical arm to move the rubber tapping device to the position in front of the last rubber tapping position of a rubber tree, the distance between the profiling rubber tapping track and the rubber tree is controlled and fixed through distance measurement of a depth sensor, and the situation that the rubber tapping device shakes during rubber tapping operation and influences the rubber tapping effect is avoided.

The invention discloses a micron-gap different-surface interdigital photoconductive switch which comprises a substrate, an ion sputtering passivation layer is plated on the substrate, an interdigitalelectrode is longitudinally connected in the substrate in an interpenetrating manner, and two polar plates of the interdigital electrode are respectively connected with a transmission line. Accordingto the invention, a small-gap different-surface interdigital electrode is used, so that uniform distribution of light energy is easy to trigger, and the problem of synchronism of trigger light pulsesis solved. A traditional transverse electrode structure is replaced by the different-plane interdigital electrode structure, multi-channel carrier transport is formed in the photoconductive switch through laser cascade triggering, and filamentous current distribution is dispersed, so that a transient working electric field in the photoconductive switch is uniformized, and the voltage endurance capability of the switch is improved.

The invention discloses a mid-span closure method for steel box girders of a cable-stayed bridge, which adopts a single-side crane to hoist a closure section steel box girder and a single tower for pushing, avoids the problem of synchronism of construction on two sides, adopts a pushing device for locking, does not need to weld a stiff skeleton and does not need to carry out balance weight in advance. The closure section steel box girder is placed on the girder tops of the cantilever steel box girders installed on the two sides in a simple support mode, the whole closure construction process is short in duration time, easy and convenient to operate, capable of saving resources and low in construction risk, various closure error adjusting methods are embodied, and high closure precision is ensured.

The invention relates to an intelligent substation modeling method. The method comprises the following steps of distributing an application identifier for each link of each intelligent substation within an area; establishing a branch station application identification information table belonging to each intelligent substation according to the application identifiers of all the links of the corresponding intelligent substation within the area; ranking the branch station application identification information tables of all the intelligent substations, summarizing the branch station application identification information tables into a unified application identification information table of the intelligent substations within the area, distributing new application identifiers for all the links of each intelligent substation according to the unified application identification information table, and establishing a new unified application identification information table of the regional intelligent substations; establishing a regional intelligent substation model according to the new unified application identification information table. According to the technical scheme, the unified application identification information table of the intelligent substations within the area is established, and the regional intelligent substation model is established according to the unified application identification information table, so that the operation reliability of the intelligent substations is effectively improved.

The invention provides a synchronous control method for load-deflection resistance of a servo pump. Under synchronous control of the servo pump of a servo oil press, a flow pressure dead zone is compensated, oil pressure characteristic function and oil pressure compensation gain values are designed, a synchronous offset threshold value and a pressure threshold value are set, practical synchronousoffset and practical system pressure are used as input for real-time judgment, when an absolute value of the practical synchronous offset is larger than the synchronous offset threshold value and it is judged that the system pressure is smaller than the pressure threshold value, oil pressure characteristic compensation is carried out on control output of an oil pressure cylinder, if not, the oil pressure characteristic compensation is not carried out on control output of the oil pressure cylinder, and synchronous control is carried out according to an originally decided synchronous control method. According to the compensation synchronous method combining with the oil pressure characteristics, the synchronous performance problem in the multi-cylinder synchronous pressing process and especially at an initial contact workpiece segment is solved, the load-deflection influence is overcome, the system synchronous performance is further improved, the workpiece quality is ensured, meanwhile,a mould is protected, the machining quality is improved, machine tool abrasion is reduced, and the life cycle of equipment is prolonged.

The invention provides a full-bridge IGBT drive circuit and an implementation method thereof. According to the invention, the two IO interfaces of the CPU are used as control signals at the same time;when the two control signal levels are the same; the IGBT driving signals are not output, the full-bridge circuit does not act, the driving signals are output and the full-bridge circuit acts only when one control signal is low and the other control signal is high, and when the levels of the two control signals are different and overturn at the same time, the driving signals are switched and theoutput voltage of the full-bridge circuit overturns, so that the problem of mutual exclusiveness is solved; the driving ends of the driving chips for controlling the opening and closing of the two groups of IGBTs are connected in series, and a current-limiting resistor is connected in series in a loop, so that the two groups of IGBTs for opening and closing operations are ensured to be simultaneously switched on and off, and the problem of synchronism is solved; the input ends of the two driving chips which are connected in series are connected with the small-capacity capacitor in parallel, the capacitor and the current-limiting resistor form an RC time-delay circuit, dead zone time delay of switching-on and switching-off operation is increased, immediate switching-off after switching-on or immediate switching-on after switching-off is prevented, and the intermittent problem is solved.

The invention belongs to the technical field of circuit board manufacturing and machining and in particular to a device for eliminating dust on a cut board edge and preventing sparks. The device comprises a board holding table and an ion fan movably mounted on the board holding table. Slide rail seats are fixedly mounted on both ends of the upper surface of the board holding table. Fan mounting brackets are slidably mounted on the slide rail seats. The ion fan is installed between the two fan mounting brackets. When a board is cut, the dust on the cut board edge is eliminated, and the synchronization of the sparks with the operation of the device is prevented. The device mainly acts to remove static electricity to prevent dust and sparks during the lamination process after the board is cut, so as to avoid generating dust on the edge of the board with the static electricity after cutting and prevent the dust from entering the board to scratch the board surface and cause internal open-circuit and internal short-circuit hidden dangers and prevent the sparks from burning the board edge. The device achieves a purpose of eliminating the dust generated by the cutting the board and preventing sparks, removes static electricity, and is safe to operate and simple.

The invention discloses a time-frequency difference compensation method of multistage simulation platform bridging. The method is as follows: a main frame period T of a simulation system is bisected for n times, main simulation solution and sensory system solution are separately accomplished within T and T / n periods, no fixed period is set for the conversion of the multistage simulation platform bridging, and a main simulation period of a tactical simulation system is responded by a handshake signal. By adoption of the time-frequency difference compensation method disclosed by the invention, the instantaneity and the synchronism of data transmission between different levels of tactical simulation systems can be effectively solved, and the occurrence of a pause phenomenon of a sensory system with relatively high time period requirements is avoided, such as pause or jitter of a scene.

The invention provides a nuclear power plant personnel airlock and an installation method thereof. The nuclear power plant personnel airlock is applicable to a double-layered containment of a nuclearpower plant. The double-layered containment includes an outer containment body and an inner containment body, wherein an inner pre-buried penetrating piece and an outer pre-buried penetrating piece are arranged on the inner containment body and the outer containment body correspondingly, the personnel airlock runs through the inner containment body and the outer containment body, and the inner pre-buried penetrating piece is fixedly connected with the personnel airlock; the outer pre-buried penetrating piece is flexibly connected with the personnel airlock in a sealed mode, and the personnel airlock includes a shell ring assembly, an outer sealing door, an inner sealing door and an intermediate transmission box, wherein the shell ring assembly is used for supporting the inner pre-buried penetrating piece and the outer pre-buried penetrating piece, the outer sealing door is used for establishing a shielding sealing barrier on the boundary of the outer containment body, and the inner sealing door is used for establishing a pressure-bearing sealing barrier on the boundary of the inner containment body; and sealed space is formed through enclosure of the shell ring assembly, the outersealing door and the inner sealing door, the intermediate transmission box can be detachably disposed in the sealed space, can be movably connected with the inner sealing door and the outer sealing door, and is used for controlling opening and closing of the inner sealing door and the outer sealing door. The reliability of the personnel airlock of the nuclear power plant is improved.