302 results about "Synchronous switching" patented technology

The invention relates to the technical field of power electronic equipment testing, and discloses a special intelligent testing device and method for a power UPS, and the device comprises a multi-source power supply system which comprises a three-phase program-controlled variable-frequency power supply, a single-phase program-controlled variable-frequency power supply and a DC program-controlled power supply, the output voltage of the three-phase program-controlled variable-frequency power supply is 0-480V and is adjustable, and the output voltage of the single-phase program-controlled variable-frequency power supply is 0-480V; the output voltage of the single-phase programmable variable-frequency power supply is 0-280V and the frequency of the single-phase programmable variable-frequency power supply is 45-64Hz and adjustable; the output voltage of the direct-current programmable power supply is 50-1000V and adjustable; an electronic load system; a signal acquisition system; an embedded control system; and an upper computer software system. A three-phase program-controlled variable-frequency power supply, a single-phase program-controlled variable-frequency power supply and a direct-current program-controlled power supply are integrated to form a multi-source power supply system, a resistive and rectifying dual-mode electronic load is combined, millisecond-level synchronous switching of a voltage level and a load state is realized through an embedded control system, a closed-loop test capability of multi-dimensional performance of the power UPS is formed, and the test efficiency is improved.

The embodiment of the invention discloses a memory module, electronic equipment and a signal transmission method. The memory module is a dual-in-line memory module, a fool-proof bayonet and a locking bayonet are arranged on a circuit board of the memory module, and a plurality of memory chips are respectively arranged on two side board surfaces of the circuit board; wherein the plurality of memory chips are connected with the processing chip through a parallel bus, and the processing chip is connected with the golden finger interface through a serial bus. Through the arrangement, the memory module can realize a serial interconnection relation through the connector, the data transmission rate can be reliably improved, crosstalk and synchronous switch noise generated by high-speed transmission based on a parallel bus are avoided, and the SI is effectively improved; the actual occupied area is small, and high-density layout is facilitated. On the whole, technical guarantee is provided for high-density layout and high-performance operation of the architecture. In addition, the physical space occupied by the memory module is roughly the same as that occupied by a traditional memory bank, and structural standardization design of a mainboard is facilitated.

The invention discloses a converter grid following-grid construction control mode smooth switching method suitable for wide-range source-grid state change. The method comprises the following steps: constructing a phase-locked loop control loop, a power outer loop control loop and a current inner loop control loop of a grid following type converter based on constant power control; constructing a voltage control loop, a phase control loop and a voltage and current double-closed-loop control loop of the network construction type converter based on the virtual synchronous generator VSG; calculating real-time output active power P and reactive power Q of the converter; constructing a voltage phase synchronization loop switching control loop and a current instruction tracking loop, and realizing smooth switching of dq-axis current instruction values output by a power outer loop of a following network type and a voltage outer loop of a construction network type; and the output dq-axis current instruction value is transmitted to a current inner loop to generate a final voltage signal, and a PWM wave is output to the converter through a modulation link. According to the method, a voltage phase synchronous switching compensation mechanism is adopted, a voltage amplitude and a phase signal are synchronously corrected in the mode switching process, and smooth change of an inner ring current reference signal is achieved.

The invention discloses an OEO amplifier with a high-speed hard switching function and an optical transmission system, and relates to the technical field of optical amplifiers, the OEO amplifier comprises three magneto-optical switches, an optical splitter group, a photoelectric detector group, a real-time comparison circuit, a logic gate control circuit and a driving circuit; the photoelectric detector group collects optical signal power to generate an electric signal; the real-time comparison circuit performs voltage threshold judgment on the electric signal; the logic gate control circuit is connected with the output end of the real-time comparison circuit so as to synchronously control the switching states of the three magneto-optical switches according to a voltage threshold judgment result; the driving circuit is used for driving the magneto-optical switch to synchronously execute a switching action; when the OEO amplifier detects that optical signals in any direction are interrupted, all the magneto-optical switches finish synchronous switching within 100 microseconds, and the end-to-end optical signal switching time difference is smaller than 2 picoseconds. The method is suitable for a single-fiber bidirectional optical communication environment requiring high frequency, high precision and high stability.

The invention discloses a board card test load circuit and equipment, and the circuit comprises a regulation and sampling module, a synchronous switch module, a feedback comparison module, a first instrument amplification module, a second instrument amplification module, and a microprocessor. A first four-pin sampling resistor and a second four-pin sampling resistor are configured on a large-current branch, the measurement precision can be improved, a microprocessor controls synchronous switching of a single-path switch unit and a multi-path gating switch unit through a synchronous control unit of a synchronous switch module in measurement so as to adapt to large-current and small-current test application scenes, and the measurement precision is improved. The microprocessor performs signal acquisition through the first instrument amplification module and the second instrument amplification module to realize feedback adjustment, and adjusts control signals of the current regulation and control unit and the synchronous control unit according to error calibration data stored in the storage module and detection data from the DMM module. Precise control of the load pulling current is realized, and the test precision is improved.

The invention discloses a synchronous switching method and device for satellite communication and a storage medium, and the method comprises the steps: determining a first terminal which builds communication connection through a wave beam, and determining a second terminal which builds communication connection with a second current satellite; determining first beam position information corresponding to the first terminal at the current moment through the beam, and determining second beam position information corresponding to the second terminal at the current moment through the inter-satellite link; judging whether the first terminal needs to be switched to a first next-hop satellite or not according to the first wave position information, and judging whether the second terminal needs to be switched to a second next-hop satellite or not according to the second wave position information; when it is determined that the second terminal needs to be switched to a second next-hop satellite, a first switching instruction is sent to the first terminal through the wave beam, and a second switching instruction is sent to a second current satellite through the inter-satellite link; and sending the second switching instruction to the second terminal, and switching the first terminal and the second terminal to the first next-hop satellite and the second next-hop satellite at the same time.

The invention provides a multidirectional conveying system and method, and belongs to the technical field of conveying systems. The telescopic mechanism is arranged at the top of the bottom plate, an L-shaped frame and a hollow frame are fixedly connected to the top of the telescopic mechanism, a plurality of conveying rollers are rotationally connected between the L-shaped frame and the hollow frame through bearings, one ends of the conveying rollers extend into the hollow frame, an adjusting mechanism is arranged in the hollow frame, and the adjusting mechanism is connected with the conveying rollers; the control unit is used for controlling rotation of the conveying rollers; the multiple rollers are in rolling fit with the multiple auxiliary rails and the main rail to conduct lifting adjustment on the multiple conveying rollers and the material transmission chain, one-time synchronous switching modes are achieved through the swing assembly without the help of cooperation of a chain conveyor and a jacking transfer machine, distribution and diversion of tray goods are simplified, and the production efficiency is improved. Not only is quick and effective switching of distribution and diversion of pallet goods ensured, but also the purchase cost of enterprises is reduced.

The invention relates to a channel synchronous switching method in a large-scale matrix switch based on an asynchronous bus, and the method comprises the steps: adding a NOR gate in a control circuit of a matrix board card, and constructing an RS422 bus and SPI hardware bus circuit containing synchronous switching control enabling; the matrix device sends I / O data to the matrix board card through the RS422 bus, and the matrix board card receives the I / O data; and the matrix equipment sends a'switching preparation ' / 'synchronous switching' instruction through the RS422 bus, and the matrix board card opens the synchronous switching control enabling or closes the synchronous switching control enabling. By adding special logic control and utilizing rising edge of a data start bit of a serial RS422 bus and synchronous switching control to enable cooperative control, switch synchronous switching of a plurality of matrix board cards under a plurality of non-synchronous microprocessors is realized, the routing switching time of a large-scale matrix is improved to an ns level from a us level, and the routing switching efficiency of the large-scale matrix is improved. When a large-scale matrix switch carries out channel routing switching, signal receiving and demodulation are not affected, and the channel is lossless and non-inductive.

The invention discloses a double-fed unit network following-construction control bidirectional undisturbed switching method and system, and relates to the technical field of power grid control, and the method comprises the steps: 1, determining a dq axis orientation mode, and giving an orientation flag bit; 2, realizing switching of the machine-side networking control model between dq-axis orientation modes in combination with an orientation flag bit; selecting a root network or a constructed network in combination with the switching instruction; and 3, setting links of enabling triggering, pre-synchronization, switch switching and PI integral initial value resetting in a control loop of network following control and network construction control, when a switching instruction is received, performing on-demand enabling on the control loop, performing pre-synchronization on a network construction pre-synchronization ring and switching a judgment switch, and performing on-demand switching on the network construction pre-synchronization ring and the judgment switch. And triggering all PI integral initial values in the control loop to reset and accessing the switched control loop. The problems that in the prior art, due to the fact that directional consistency is not considered, severe switching fluctuation is likely to be caused, integral operation is excessive, and due to the fact that pre-synchronization precision is poor, large impact is likely to be generated in the switching process are solved.

The station switching mechanism comprises a station switching support, a station switching arm, a first driving part and a second driving part, the station switching arm is connected with a station switching arm shaft, and the station switching arm shaft is rotationally arranged on the station switching support; a sliding groove is formed in the station switching arm, a switching arm buckle is arranged in the sliding groove, and the station switching arm is connected with the workbench in a buckled mode through the switching arm buckle. The first driving part is connected with the station switching arm shaft, the station switching arm shaft is driven by the first driving part to rotate, and station switching of the station switching arm is achieved. The second driving piece is connected with the switching arm buckle, and the switching arm buckle is driven by the second driving piece to move along the sliding groove. The synchronous switching mechanism is simple and reasonable in structural design, high in practicability, small in overall size, high in applicability and convenient to operate, accuracy and reliability of operation actions are guaranteed, synchronous switching operation can be carried out on workpieces on two stations at the same time through the synchronous switching mechanism, the workpieces on the two stations are synchronously operated in a one-in-one-out mode, and therefore work efficiency is effectively improved.

The invention relates to the field of turning equipment, and discloses oil press pressing screw outer spiral machining equipment which comprises a rack base, an embedded stabilizing mechanism is located on an operation sliding table, and the embedded stabilizing mechanism is matched with an external rotary drum and a distribution guide rail of a guide roller shaft to be used for conducting circumferential clamping along the interior of a pressing screw blank. The linear traction mechanism is located on the center guide groove table, and the synchronous switching mechanism is located on the rack base and used for fixing thread groove cutting tools and synchronously switching the tools in cooperation with the side sliding table, the regulation and control screw rod, the linear opposite grooves of the center guide groove table and the U-shaped guide grooves of the linkage guide groove table. Synchronous clamping, fixing and rotating of two sets of pressing screw blanks are achieved through a concentric clamping mechanism and an opposite output mechanism which are symmetrically designed, double-station external spiral cutting is completed at a time in cooperation with a synchronous switching mechanism driven by linear traction, a mechanical structure that a center gear is in linkage with upper and lower opposite racks is adopted, strict synchronous movement of the clamping mechanisms on the two sides is ensured, and the working efficiency is improved. Machining errors caused by single-side stress are avoided, and meanwhile the power input requirement is simplified.

The invention provides mobile power generation equipment capable of realizing commercial power synchronous switching during commercial power maintenance, which comprises a box body, a generator is arranged in the box body, and an integrated control box is arranged on the box body and comprises an upper box chamber, a middle box chamber and a load junction box chamber; a synchronous control module is arranged in the upper box chamber, and a generator synchronous contactor, a generator main circuit breaker, a mains supply synchronous contactor and a current transformer are arranged in the middle box chamber; the synchronous control module is connected with the generator, the generator synchronous contactor is connected with the synchronous control module through a switching-on and feedback signal line, and the generator main circuit breaker is connected with the diesel generator synchronous contactor. According to the mobile power generation equipment, the integrated control box is arranged, the synchronous control module, the commercial power synchronous contactor, the current transformer and other modules are arranged in the integrated control box, a synchronous switching system can be conveniently constructed with commercial power, synchronous switching of commercial power supply and generator power supply can be achieved when a commercial power line is overhauled, and field operation is convenient and fast.

The invention provides a one-time synchronous switching system for mobile power generation equipment and commercial power. The one-time synchronous switching system comprises a synchronous control module, a generator synchronous contactor and a generator main circuit breaker, the commercial power input end is connected with the synchronization control module after passing through the synchronization sampling conversion change-over switch; the commercial power input line is provided with a commercial power synchronous contactor which is connected with the synchronization control module through a synchronization sampling conversion change-over switch. The commercial power synchronous contactor is connected with the load end of the user busbar after being converged with an output end line of the generator main circuit breaker; and a busbar parameter acquisition module is arranged between the user busbar load and the synchronous sampling conversion change-over switch. The synchronous control module, the commercial power synchronous contactor, the current transformer and other modules are arranged on existing mobile power generation equipment, field wiring operation is carried out according to a designed circuit, two-time synchronous switching of commercial power supply and generator power supply during maintenance of a commercial power line can be achieved, and loss caused by power failure to a user is avoided; and the field operation is convenient and fast.

The invention discloses a photoelectric simultaneous-cutting multichannel test fixture and a battery test system, which are characterized in that components such as a photomask plate, a bottom electrode block, a top electrode down-leading circuit board and a switching slide block are integrated in a fixture body, so that when a to-be-tested sub-battery of a solar battery sample is tested, the to-be-tested sub-battery of the solar battery sample can be tested by the photomask plate, the bottom electrode block, the top electrode down-leading circuit board, the switching slide block and the like; the switching sliding block slides to enable the light transmitting opening to be aligned with the to-be-tested sub-battery, and meanwhile the connecting piece is electrically connected with the electrode of the to-be-tested sub-battery, so that synchronous switching of illumination and electric connection is achieved. According to the technical scheme, synchronous switching of the illumination channels and the electric connection channels of the multiple sub-cells in the solar cell sample can be achieved through the operation of sliding (illumination positioning and electrode conduction of the target sub-cell are completed at the same time), and the situation that in the prior art, a photomask assembly and a circuit channel switcher need to be operated separately is effectively avoided; the testing process is simplified, the misoperation risk is reduced, and the photoelectric path consistency is improved.

The utility model provides a kind of foaming forming die die changing cooperation mechanism, including die changing device, foaming mould box and mould box clamp, mould box clamp includes upper clamp and lower clamp, foaming mould box includes upper die and lower die, first lock pin connecting mechanism and second lock pin connecting mechanism are respectively equipped between upper clamp and upper die and between lower clamp and lower die, die changing device includes device frame, device frame is also equipped with die changing assembly, first lock pin connecting mechanism and second lock pin connecting mechanism both have locking connection state and unlocking separation state, when being in locking connection state, upper clamp and upper die, lower clamp and lower die are connected as a whole, when being in unlocking separation state, upper clamp and upper die, lower clamp and lower die are disconnected, die changing assembly can drive first lock pin connecting mechanism and second lock pin connecting mechanism synchronous switching between locking connection state and unlocking separation state. The utility model can save artificial cost, improve die changing efficiency.

The application relates to the technical field of ring network boxes, and discloses a one-two fusion convenient maintenance ring network box, which comprises a box body and a plurality of electrical elements arranged in the box body, the box body comprises a top plate, side plates and a bottom plate, a plurality of heat dissipation holes for heat dissipation are formed in the side plates, a switching-on and switching-off knife is arranged on the electrical elements, a connecting groove is formed in the switching-on and switching-off knife, a magnetic block is arranged on the groove wall of the connecting groove, a driving rod is further connected to the switching-on and switching-off knife, a plurality of trigger rods are arranged on the driving rod, an adsorption block which is magnetically opposite to the magnetic block is arranged at the end of the trigger rod away from the driving rod, and the adsorption block extends into the connecting groove. The one-two fusion convenient maintenance ring network box realizes the synchronous switching-on and switching-off of a plurality of switching-on and switching-off knives through single operation of the driving rod and the trigger rod, and the condensate water on the inner walls of the side plates is scraped off through the dehumidification mechanism, so that the maintenance efficiency of the ring network box is improved, and the safe work of the electrical elements in the ring network box is ensured.

The invention discloses a layered suspension conveying structure for coffee powder boxes of a coffee machine, and particularly relates to the technical field of suspension conveying, the layered suspension conveying structure comprises a plurality of conveying upper-layer boxes, a wireless controller, a miniature electric cylinder and a layered synchronous switching conveying assembly; the layered synchronous switching conveying assembly comprises a connecting block, a frame strip, a plurality of linkage blocks, a linkage block, a switching sealing plate, an upper conveying hole, a lower conveying hole, a conveying pipe and a suspension rope. The layered synchronous switching conveying assembly is adopted, intelligent switching of four kinds of coffee powder and eight kinds of coffee powder is achieved, intelligent hanging synchronous conveying of various kinds of coffee powder is achieved, the conveying efficiency of various kinds of coffee powder is improved, and the use and maintenance cost in the conveying process is effectively reduced; therefore, the problems that synchronous conveying and discharging of various kinds of coffee powder are difficult to achieve according to different ingredients, and meanwhile the use and maintenance cost is increased are solved.

The invention relates to a single-motor-driven double-opening vertical hinged door driving device capable of being synchronously and independently opened and closed, which comprises a driving motor (1) and a synchronous transmission device (2), the driving motor (1) is provided with two output shafts (11) with opposite rotating directions, clutches (3) are respectively arranged on the two output shafts (11), the output part of one clutch (3) is connected with a door shaft (4) of one side door, and the output part of the other clutch (3) is connected with a door shaft (5) of the other side door. Or the clutch (3) is connected with the door spindle (4) of one side door through a synchronous transmission device (2), the output part of the other clutch (3) is connected with the door spindle (4) of the other side door through the synchronous transmission device (2), and the synchronous transmission device (2) is composed of two transmission wheels, a transmission belt, a transmission chain, a transmission rope or a transmission rod which are arranged on the output part of the clutch (3) and the door spindle (4) respectively. The door is better in using effect and convenient to control, the two doors can be opened and closed synchronously, and one door can be opened and closed independently. And when the two doors are not synchronous, the two doors are easier to recover to a synchronous state.

This application discloses a dual-network synchronous switch and a dual-network synchronous switching method, relating to the field of network communication technology. The dual-network synchronous switch comprises a field programmable gate array (FPGA) and a central processing unit (CPU). The FPGA includes a high-speed interface processing module, a time frame module, a MAC processing module, a clock synchronization module, a time maintenance module, an FPGA time interaction module, and a data exchange module. The CPU includes a data processing module, a CPU time interaction module, and an Ethernet MAC module. This application implements clock information exchange through the FPGA time interaction module and the CPU time interaction module, and data exchange through the data exchange module and the data processing module. The Ethernet MAC module encapsulates the received clock information and data, which can then be communicated with other networks after encapsulation, thereby achieving clock synchronization and data exchange between the dual networks.

This invention relates to the field of drilling equipment, specifically a badminton racket positioning drilling device, comprising a frame, a clamping head, a drilling head, and a feeding assembly. The feeding assembly includes two sets of alternately operating feeding shafts located on the inner and outer sides of the frame, respectively. The feeding assembly also includes a base, a front swing arm, and a rear swing arm. The feeding shafts are fixed on the front and rear swing arms, respectively. Each feeding shaft includes a long beam, a housing, and a conveyor belt. This invention provides two sets of feeding shafts for carrying and conveying racket frames. When one feeding shaft is carrying and conveying racket frames on the inner side of the frame, the other feeding shaft can be positioned near the outer side of the frame for convenient loading by the user. After the inner feeding shaft is empty, a synchronous switching mechanism can drive the two swing arm components to move alternately, sending the feeding shaft that has been carrying a new racket frame to the inner side of the frame for feeding, thereby achieving continuous cyclic feeding without stopping the machine.

The invention discloses a 6U dual-core radio frequency signal processing method and system based on a heterogeneous computing architecture, and relates to the technical field of radio frequency signal processing. The method comprises the following steps: the embedded processing unit analyzes an external task instruction and distributes the external task instruction to the radio frequency direct sampling unit; the radio frequency direct sampling unit collects a radio frequency signal and generates a noisy baseband data stream. The auxiliary sampling ADC synchronously collects broadband switch noise, and generates an interference signal through a time sequence AI model; the hardware acceleration unit cancels the baseband data stream based on the interference signal to generate a clean data stream; and executing hardware acceleration processing on the clean data stream and writing the clean data stream into a shared memory unit. The technical problem that broadband synchronous switching noise generated by a digital circuit interferes with a radio frequency receiving link, and consequently the quality of a baseband data stream is reduced is solved, and the technical effect that the precision, reliability and real-time performance of radio frequency signal processing are improved through real-time noise cancellation and hardware acceleration processing is achieved.

The invention discloses a piezoelectric energy acquisition circuit based on a parallel synchronous switch inductor, which comprises n piezoelectric transducers, n rectification circuits, n peak detection modules, an inductor, a first diode and an energy storage capacitor, and is characterized in that each piezoelectric transducer acquires vibration energy, converts the vibration energy into alternating voltage and outputs the alternating voltage; each rectifying circuit rectifies alternating current voltage into direct current voltage to be output, the first diode prevents load current from flowing back, the energy storage capacitor is used for storing electric energy and supplying power to a load, and a one-way conduction circuit, a switching circuit and a detection device are arranged in each peak value detection module; the detection device of each peak detection module can be connected in parallel with the inductor through the switching circuit of the detection device; the piezoelectric transducer has the advantages that only the positive half-cycle peak value of the output voltage of the piezoelectric transducer needs to be detected, the number of components needed by the peak value detection module is small, the overall circuit size is reduced, the cost is reduced, inductors can be shared at the same time during expansion, a time division multiplexing mode does not need to be adopted, and the expansion performance is high.

The utility model provides a micro electric energy collection circuit. The rectification unit is responsible for converting the alternating current output of the piezoelectric collector into a pulsating direct current signal; the synchronous charge extraction unit comprises a self-powered peak detection circuit and a synchronous switch controller and is responsible for efficiently transferring charges from a piezoelectric element to an electric quantity extraction inductor; the secondary electric energy storage unit comprises a primary electric energy storage device, a detection switch, a charging circuit, a secondary electric energy storage device and a voltage stabilization output circuit, input and output of each functional module are sequentially connected in series, and electric energy flows in a one-way mode; the absorption circuit is responsible for absorbing the electric energy in the inductor extracted by the circuit and effectively storing and stably outputting the electric energy; all the functional units are sequentially connected in series, and electric energy flows from the rectifying unit to the voltage stabilizing output circuit of the secondary storage unit in a one-way mode. The input end of the rectification unit is connected with the output end of the micro-electric energy collector, and the output end of the secondary storage unit is connected with the low-power-consumption internet-of-things sensor load. According to the utility model, intermittent weak AC electric signal energy from piezoelectric elements can be efficiently captured, and the intermittent weak AC electric signal energy can be adjusted to a stable output voltage of the Internet of Things sensor through secondary storage.

The invention discloses an industrial internet switching management system and method based on 5G communication, and relates to the technical field of industrial monitoring, and the method comprises the steps: obtaining the information of all fault subunits; judging whether the distribution condition of the fault subunit in the factory meets the preposed requirement of the 5G network fault, and analyzing the centrality and interference of the fault subunit if the distribution condition of the fault subunit in the factory meets the preposed requirement of the 5G network fault; synchronous switching and staggered switching of the 5G network and the wired network are carried out; analyzing the spatial distribution condition of the fault subunits as a precondition of 5G network fault judgment; the centrality and interference of fault subunits are further analyzed, so that the possibility of wrong judgment of 5G network faults is reduced, and the influence on factory operation is reduced; the 5G network state can be automatically judged, the switching between the 5G network and the wired network is realized, the DCS network safety is ensured, and the production equipment monitoring stability is ensured.

The invention discloses a water heater parameter processing method and device and a water heater, and relates to the technical field of water heaters, the method comprises the steps that storage synchronization parameters set by a user are received, and the storage synchronization parameters comprise a test switch, a user selection storage device, a storage area and a synchronization switch; if the user selects the storage device as the display panel, storing update parameters in the storage area of the display panel according to whether the test switch is turned on or not, and synchronizing the update parameters from the display panel to a mainboard according to whether the synchronous switch is turned on or not; and if the user selects the storage device as the mainboard, storing update parameters in the storage area of the mainboard according to whether the test switch is turned on or not, and synchronizing the update parameters from the mainboard to the display panel according to whether the synchronous switch is turned on or not. The development and test efficiency of water heater products can be improved, and the experience feeling of a user on the water heater is improved.

This invention relates to a non-contact, low-temperature, intermittent heat exchange pulsed-dynamic electrolytic machining apparatus and method, belonging to the field of electrolytic machining. The apparatus consists of a blade workpiece, a cathode plate, a cathode holder, and an insulating sleeve. The cathode plate undergoes high-frequency reciprocating vibration during radial feeding, coordinated with the synchronous switching of a pulse power supply, to achieve pulsed-dynamic electrolytic machining. In this pulsed-dynamic electrolytic machining method, the cooling medium flows into the insulating sleeve from the inlet of the cooling channel, flows through the cooling channel, and then flows out from the outlet of the cooling channel, reducing the temperature inside the insulating cavity. As the blade is shaped and enters the insulating cavity, the cooling medium undergoes convective intermittent heat exchange with the stray electrolyte within the cooling channel, reducing the temperature and conductivity of the stray electrolyte, and even freezing the stray electrolyte, creating a low-temperature environment around the shaped blade and inhibiting the electrolytic reaction in the stray corrosion zone. Pulsed-dynamic machining promotes the removal of electrolytic products and heat, further improving machining accuracy and surface quality.

The utility model discloses an identification friend or foe signal lamp and an identification friend or foe system, a main control board in the identification friend or foe signal lamp is provided with a wireless communication module, a shell is provided with a master-slave dial key and a mode key, and the identification friend or foe signal lamp can be configured as a host or a slave when the master-slave dial key is located at a host gear or a slave gear. The host is used for transmitting a light signal selected by the mode key to each slave through the wireless communication module so as to switch the light signals of the LED indicating lamps on the host and the slave, so that the light signals of the LED indicating lamps on the host and the slave are switched in group simulation confrontation activities; each team member in a team can set the host and the slave through the master-slave dial key on the worn identification friend or foe signal lamp, so that the team member wearing the host can select a light signal through the mode key and then control each slave to switch the light signal through the wireless communication module. The team members in the whole team can realize synchronous switching of light signals identified by friend or foe, and the team can conveniently carry out tactical adjustment.

The invention relates to the field of digital circuit design, and provides a method for optimizing noise influence of a synchronous switch in an IBIS model. When a traditional IBIS model measures pull-up / pull-down characteristics, it is assumed that a power supply and ground potential are constant, voltage fluctuation actually caused by a synchronous switch is ignored, and the simulation precision of a high-speed interface is reduced. By collecting current response data of a pull-up circuit and a pull-down circuit of the buffer under different power supply / ground fluctuations, pull-up and pull-down power supply modulation coefficients are calculated respectively, and the influence of power supply voltage disturbance on output current is represented. In the simulation stage, the output current in the IBIS model is dynamically modulated according to the power supply and ground potential change caused by the real-time SSN, so that the simulation is closer to the real chip behavior. The method does not need to modify a model structure, is compatible with an existing process, remarkably improves the accuracy of high-speed signal integrity analysis, is suitable for design verification of DDR, PCIe and other high-density parallel interfaces, and effectively supports the system-level power supply and signal co-simulation requirements.

The invention discloses a machining tool for a high-stability composite hub, and relates to the technical field of machine tool machining. Comprising a bed body, the bed body is connected with an installation top through a multi-axis linkage mechanism, an installation bottom plate is fixed to the bottom of the installation top, a plurality of second sliding grooves are formed in the upper end of the installation bottom plate, a fixing column is installed in the middle of the upper end of the installation bottom plate, and a first gear is connected into a groove in the outer end of the fixing column through a motor; the outer end of the first gear is connected with a first inner gear ring in a meshed mode, the lower end of the first inner gear ring is connected with an adjusting plate, the multiple drill bits are arranged through cooperation of the installation bottom plate, the adjusting plate and the installation sliding block, and the corresponding positions of the multiple drill bits can be synchronously adjusted according to the punching positions of hub bolt holes of different specifications. And the adjusting assembly is arranged to be matched with the oil liquid assembly, and when the bolt hole is polished, synchronous switching and position adjusting of the multiple drill bits and the polishing head are rapidly conducted.

The embodiment of the present disclosure provides a memory synchronous switching noise test method and test device, the test method comprises: determining one data input and output terminal of the memory as a first data terminal, and the rest data input and output terminals as second data terminals, and determining the transmission frequency of the first data terminal as a first frequency, and the transmission frequency of the second data terminals as a second frequency; wherein the first frequency is higher than the second frequency; writing first preset data to the first data terminal, and writing second preset data to the second data terminal; reading the written first preset data from the first data terminal; determining whether the memory has synchronous switching noise according to the frequency spectrum information corresponding to the data read from the first data terminal. The embodiment of the present disclosure distinguishes the transmission frequencies of the first data terminal and the second data terminals, and determines whether the memory has synchronous switching noise according to the frequency spectrum information in the data reading and writing process.