240results about How to "Good synchronization" patented technology

The invention relates to the technical field of data transmission and updating, in particular to a data transmission and updating system and method of a cloud mobile phone. According to the technical scheme, the system comprises an intelligent network monitoring module, a dynamic bandwidth allocation module, a server load balancing module, an intelligent data synchronization module and a cache management module, and the intelligent network monitoring module monitors network conditions, including network bandwidth, network congestion degree and network stability, between a user terminal and a cloud server in real time. Through the synergistic effect of the intelligent network monitoring module, the dynamic bandwidth allocation module, the server load balancing module, the intelligent data synchronization module, the cache management module and the like, the network condition is accurately monitored, the bandwidth is reasonably allocated, the server load is optimized, the data synchronization and completeness are ensured, and the cache efficiency is improved; stable and reliable network connection, preferential key data transmission and rapid data synchronization and loading are brought to users, and the use experience of the cloud mobile phone and the overall performance of the system are greatly improved.

The invention relates to the technical field of synchronous acquisition, in particular to a multi-camera synchronous data acquisition method and system, and the method comprises the following steps: based on a real-time video stream of a camera, analyzing a video frame, recognizing a moving object in a differentiated video stream, and carrying out the recognition of the moving object in the differentiated video stream; and synchronously recording the occurrence time and position change of the moving object in the differentiated camera to obtain view angle change data. According to the invention, the angle and focal length of the camera are synchronously adjusted to cope with the view angle change of different scenes, and the trigger time of the camera is uniformly configured and is synchronously started through the network, so that the time deviation is reduced, the analysis of the synchronous trigger data set and the timestamp adjustment are synchronously triggered, and the synchronization between the cameras is optimized; the consistency and synchronism of the video streams obtained from different angles are ensured, the data transmission parameters are dynamically adjusted according to the network condition, the efficiency and synchronization precision in the data transmission process are improved, and the influence of network delay and bandwidth change is effectively dealt with.

The invention relates to the technical field of toxic gas monitoring, in particular to a limited space operation environment gas monitoring device which comprises a shell, a controller and an audible and visual alarm, a gas cavity is formed in the shell, a pushing assembly, a detection assembly and a sealing assembly are arranged in the shell, and the pushing assembly comprises an air cylinder, a through hole and a pushing plate; the detection assembly comprises a servo motor and a rotating disc, a plurality of air storage cylinders are arranged on the circumference of the rotating disc, harmful gas sensors are arranged in the air storage cylinders, the sealing assembly comprises a mounting plate and a water through hole, a micro motor, a baffle a and a baffle b are arranged in the mounting plate, an air inlet and a water inlet are formed in the mounting plate, and a piston is arranged in the water through hole. The air cylinder drives the push plate to push air in the air cavity into the air storage cylinder to be detected through the harmful gas sensor, when the push plate descends, the micro motor drives the baffle a and the baffle b to seal the air inlet, and meanwhile, the piston squeezes water in the water through hole into the position between the baffle a and the baffle b to be further sealed, so that the detection result is more accurate.

The utility model discloses a transplanter duckbilled planter and brush transmission mechanism with a soil cleaning function, which comprises a mounting plate, a comprehensive transmission mechanism is mounted on the mounting plate, a brush support is further mounted on a frame of a transplanter, a swing plate is rotatably connected to the brush support through a hinge seat, a brush shaft is mounted at the other end of the swing plate, and the brush shaft is rotatably connected to the brush support through a hinge seat. The brush shaft is fixedly connected with a cylindrical brush, a brush transmission wheel is installed on the brush shaft, and the brush transmission wheel is in transmission connection with the brush driving wheel through a transmission chain. The comprehensive transmission mechanism is used for driving the duckbilled planting device to vertically rotate, driving the duckbilled planting device to periodically open and close and driving the brush to periodically swing along with the duckbilled planting device; an opening part and a closing part are arranged in the rotating track of the duckbilled planting device, and when the duckbilled planting device is located at the opening part in the rotating track of the duckbilled planting device, the brush swings along with the duckbilled planting device and is connected with the duckbilled planting device. When the brush rotates, the closed part in the rotating track of the duckbilled planting device is in close contact with the duckbilled planting device, soil impurities adhered to the inner wall and the outer wall of the duckbilled planting device are cleaned, the cleaning effect is good, the soil cleaning efficiency is high, manual cleaning can be carried out without shutdown, and the plant transplanting efficiency is remarkably improved.

The invention belongs to the technical field of cable processing, and particularly relates to cable processing equipment which is characterized in that a first supporting frame and a second supporting frame are rotationally connected with a first wrapping ring and a second wrapping ring respectively, the first supporting frame is provided with a positive driving wheel meshed with the first wrapping ring, and the second supporting frame is provided with a negative driving wheel and a negative synchronizing wheel meshed with the negative driving wheel; the reverse driving wheel is meshed with the second wrapping ring, the transmission ratio of the reverse driving wheel to the second wrapping ring is equal to the transmission ratio of the first wrapping ring to the positive driving wheel, and a driving device is arranged between the first supporting frame and the second supporting frame and connected with a controller. The output end of the driving device penetrates through the first supporting frame and the second supporting frame to be connected with the positive driving wheel and the negative driving wheel, and a wire guiding device is further arranged between the first supporting frame and the second supporting frame. And the problems of easy generation of gaps and high consumption of the wrapping tape in the same-direction multi-layer wrapping are reduced.

The invention discloses a mahjong machine and a horizontally-pushing tile feeding device and a tile supporting plate transmission mechanism thereof, the mahjong machine comprises a tile feeding seat, a tile supporting plate, two tile feeding curve cams, two tile feeding rocker arms, two tile feeding rocker arm shafts, two tile feeding rocker arm cams and two first gears, the tile feeding rocker arm cams are fixedly connected with the tile feeding rocker arm shafts, cam grooves are formed in the tile feeding rocker arm cams, and the tile supporting plate transmission mechanism is arranged on the tile feeding seat. The first gear is rotatably mounted on the mahjong feeding seat and is in matched transmission with the mahjong feeding rocker arm cam through a crank; and the two first gears are driven by a horizontal pushing mahjong tile feeding motor to rotate synchronously. According to the scheme, the gear transmission mechanism is adopted, the cam is installed on the mahjong tile feeding rocker arm shaft and is in matched transmission with the mahjong tile feeding rocker arm shaft through the crank gear, transmission torque is large, stability and synchronism are better, the torque transmission capacity and bearing capacity of the mechanism are improved, the supporting strength of the mahjong tile supporting plate is improved, the transmission structure is more reasonable, and lifting of the mahjong tile supporting plate is smoother and more reliable; installation and debugging are more convenient, and maintenance, disassembly and assembly are more convenient.

The present invention relates to the technical field of equipment in the logistics industry, and specifically to a linear cross-belt sorting machine, comprising a driving end mechanism, a driven end mechanism, and a driving chain connected between the driving end mechanism and the driven end mechanism, and also comprising a trolley driven by the driving chain and a tray belt conveyor for sorting installed on the trolley, wherein the driving end mechanism is provided with a driving disk, and the driven end mechanism is provided with a driven disk, the driving chain is wound around the driving disk and the driven disk to form a closed loop that runs back and forth, the left and right ends of the trolley are respectively provided with a left running wheel and a right running wheel, the driving end mechanism is provided with left and right driving end U-shaped guide grooves for respectively running and guiding the left and right running wheels, the driven end mechanism is provided with left and right driven end U-shaped guide grooves for respectively running and guiding the left and right running wheels, the driving disk and the driven disk are located between the left and right running wheels, and the operation is stable with low noise.

The invention belongs to the technical field of dual-computer hot standby, and discloses a dual-computer hot standby system and a dual-computer switching method. The dual-machine hot standby system comprises a machine A and a machine B which are hot standby for each other, and an internal switch; one of the A machine and the B machine is a host used for performing data communication with an external system, and the other one is a slave used for backing up data of the host; the machine A and the machine B are connected with an external system through respective external communication interfaces; and the machine A and the machine B are connected with respective reflective memory cards through optical fibers to serve as main synchronization channels, and are connected with an internal switch through the Ethernet to serve as a standby synchronization channel through respective internal communication network ports, so that data synchronization and backup between the machine A and the machine B are realized. The invention further provides a corresponding switching method. According to the invention, the reliability and stability of long-time uninterrupted operation of the dual-computer hot standby system can be improved, the switching recovery time is shortened, and the requirements of different network environments and application scenes can be met.

The invention discloses heat treatment equipment with a turn-over function and a method thereof, and belongs to the technical field of heat treatment, the heat treatment equipment comprises a shell, a conveying heating device used for conveying and heat treatment and a turn-over device used for turning over plates are mounted on the inner side of the shell, and the conveying heating device is connected with the turn-over device; the turnover device comprises a turnover pushing assembly used for turning over the plates and pushing the plates to the conveying and heating device and an intermittent driving assembly used for driving the turnover pushing assembly to operate intermittently, the turnover pushing assembly is installed on the inner side of the shell, and the intermittent driving assembly is connected with the turnover pushing assembly and the conveying and heating device. By means of the mode, due to the arrangement of the overturning and pushing assembly, plates can be overturned and pushed in the heat treatment process, the two sides of the plates are evenly heated, the subsequent machining effect is better, and the problem that the plates stay on the overturning and pushing assembly and cannot be conveyed and discharged by the conveying and heating device is solved.

The invention discloses a low-voltage transformer area terminal time synchronization method based on downsampling feature sequence maximum matching, which comprises the following steps that: a user side measurement terminal extracts a significant voltage change event, and uploads a time sequence of the significant voltage change event and a state sequence of the significant voltage change event to an edge terminal; the edge terminal calculates clock skew between any two user side measurement terminals through a down-sampling maximum sequence matching method; the edge terminal selects one user side measurement terminal as a reference, calculates clock skew between the other user side measurement terminals and the edge terminal, and issues the clock skew to the other user side measurement terminals; and the user side measurement terminal performs time offset when uploading section data based on the received clock skew, so that accurate time synchronization of the low-voltage transformer area terminal is realized. The method does not depend on GPS / Beidou synchronous time service, terminal equipment in a transformer area asynchronously collects feature sequences, transformer area edge equipment aligns the feature sequences of all the terminals, and finally clock synchronization among all kinds of equipment is achieved.

The invention provides a clamping assembly which comprises a clamping seat and a first clamping piece which are movably matched, a first clamping jaw is arranged at the outer end of the first clamping piece, a first elastic piece is arranged between the first clamping jaw and the first clamping piece, the clamping seat is provided with first clamping teeth, the first clamping jaw is provided with second clamping teeth, and the first clamping jaw is provided with a second elastic piece. When the first clamping teeth and the second clamping teeth are close to or meshed with each other, a wiping object is clamped, the thickness of the wiping object changes the clamping distance between the first clamping teeth and the second clamping teeth, and the elastic force of the first elastic piece enables the first clamping teeth and the second clamping teeth to keep the trend of approaching to each other. Therefore, the wiping object is clamped. The cloth clamping mop comprises a handle and the clamping assembly. The cleaning device has the advantage that by arranging the first clamping jaw capable of elastically stretching out and drawing back, the clamping assembly can clamp a wiping object with a larger thickness range so as to meet different cleaning requirements.

The invention discloses a cross-protocol document approval method, system and device, a medium and a program product, and the method comprises the steps: firstly building a cross-protocol bidirectional connection relation with a rear-end server for each application end; sending the approval document to a back-end server; receipt change information pushed by the back-end server is received; and finally, dynamically updating the state of the approval document according to the document change information. The method can effectively reduce the examination and approval delay and improve the examination and approval efficiency through the persistent connection and instant notification mechanism of the WebSocket, solves the problem that different protocols or application data are difficult to synchronize through the cross-protocol support of the WebSocket, effectively reduces the cross-application data integration difficulty through the unified data interface and the WebSocket communication function, reduces the development and maintenance cost, and improves the examination and approval efficiency. By dynamically adjusting a data updating strategy and an integrated security mechanism, the reliability of data transmission updating under various network conditions is ensured, and the security and integrity of data are protected at the same time.

The invention relates to the technical field of numerical control machine tools, in particular to a machine tool Z-axis brake anti-falling locking mechanism which comprises a saddle, a transmission mechanism is arranged at the top of the saddle, a limiting mechanism is arranged on one side of the transmission mechanism, the transmission mechanism comprises a mounting seat arranged at the top of the saddle, a servo motor is arranged at one end of the mounting seat, and a transmission shaft is arranged at the other end of the mounting seat. The limiting mechanism comprises a rotating shaft rotationally arranged at the top of the saddle and a circular ring in threaded connection with the top of the transmission shaft, the top of the rotating shaft is connected with a limiting piece, one end of the limiting piece is provided with a convex corner, the other end of the limiting piece is provided with a roller, and the roller is attached to the outer side of the synchronous belt a. The rotating shaft is sleeved with a torsion spring, convex teeth are arranged on the outer ring of the circular ring, the servo motor drives the transmission shaft and the lead screw to rotate through a synchronous belt a to achieve movement of the Z axis, and after the synchronous belt a is broken, the torsion spring drives the rotating shaft to rotate to lock the transmission shaft through abutting of convex corners and the convex teeth.

The invention provides a small whip antenna synchronous unfolding mechanism with controllable unfolding time, and mainly solves the problem that the occupied space of an antenna on a small unmanned aerial vehicle is large, and the scheme of the small whip antenna synchronous unfolding mechanism with controllable unfolding time is as follows: the antennas needing to be synchronously unfolded are arranged on a rotating shaft in series; a pin puller is adopted to restrain the rotating shaft at the folding position; when the antenna is unfolded, the pin puller relieves the constraint on the rotating shaft, and the rotating shaft drives the antenna to rotate to an unfolding position under the driving of the torsion spring; after the antenna is unfolded in place, the limiting pin extends out under the driving of the pressure spring to lock the antenna; the antenna unfolding mechanism has the outstanding advantages that the antenna unfolding time is controllable, the synchronism is good, and the space size occupied by the unfolding mechanism is small.

The fault recording system comprises a cloud server, a gateway and the high-power frequency converter, the cloud server is connected with the gateway through a wireless network, and the gateway is connected with the high-power frequency converter through a network cable. According to the invention, more monitoring means can be provided for testing, debugging, operation and maintenance personnel. Fault data collected by the system is wide in sampling period range and good in synchronization performance, the fault data is collected, stored and transmitted in a classified mode, key data are not lost in power failure, it is ensured that the data are not lost and not repeated in the communication process, and meanwhile network transmission blocking is avoided. A user can check a fault list or waveform data at a computer end and a mobile communication end.

The utility model discloses a walking swinging telescopic mechanism for tunnel construction ultrasonic detection, which belongs to the technical field of tunnel ultrasonic detection equipment and specifically structurally comprises a walking door frame, an electric walking mechanism, an arc-shaped synchronous driving transmission belt and a telescopic cylinder. An arc-shaped rail is installed on the rear side of the walking door frame, the arc-shaped rail is consistent with the inner arch face of the tunnel, the two ends of the arc-shaped rail extend to be close to the ground, the arc-shaped rail is connected to a sliding plate through a sliding block, and an arc-shaped synchronous driving belt is connected to the inner side of the sliding plate. According to the utility model, the detection position and orientation are accurate and reliable, the detection result is more accurate, the radial swing angle adjustment can always ensure the measurement perpendicular to the tangent line of the detection point, and the telescopic cylinder controls the telescoping through the measurement accuracy, so that the telescoping function is realized; and a certain protection effect on the probe is achieved.

The invention discloses a tilting folding wing and a vertical take-off and landing aircraft. Comprising a central wing (2), outer wings (3) capable of being folded / unfolded in a tilting mode are symmetrically connected to the two ends of the central wing (2), and tilting rotating shafts (501) of the outer wings (3) are located at the outer ends of the central wing (2) and located at the positions, close to the rear portions, of the front edges of the outer wings (3); the two outer wings are driven by the same folding driving mechanism (4) to be folded / unfolded in a tilting mode, and the connecting line of points on the outer wings (3) before and after tilting is perpendicular to the rotating shaft (501). The device has the advantages of being simple in structure, good in synchronism and high in safety.

The invention belongs to the field of unmanned aerial vehicle data transmission, and relates to an MIMO-OFDM time-frequency synchronization method suitable for a strong multipath channel of an unmanned aerial vehicle. Comprising the following steps: (1) determining the number of transmitting antennas, the length of a lead code and a pseudo-random sequence; (2) generating a multi-antenna sending lead code sequence by using the pseudo-random sequence; (3) generating a sending data frame by using the multi-antenna lead code; (4) correlation is carried out before and after the lead code sequence to carry out coarse time synchronization; (5) performing decimal frequency offset estimation, and compensating the received data; (6) calculating a two-dimensional metric function of integer frequency offset estimation and fine time synchronization; (7) jointly performing strongest path search and integer frequency offset estimation; and (8) searching on the basis of the strongest path to obtain a fine synchronization result. According to the method, the orthogonal preamble sequence independent of the number of antennas is designed at the sending end of the MIMO-OFDM communication system of the unmanned aerial vehicle, the coarse synchronization algorithm and the fine synchronization algorithm of the receiving end adapt to a multipath channel and are not affected by frequency offset, the frequency offset estimation range is large, and good synchronization performance can be achieved.

The invention discloses a thin film thickness measurement method, device and equipment based on an ultrasonic time domain signal, and relates to the technical field of liquid film thickness ultrasonic measurement. The method comprises the following steps: interpolating an obtained solid-liquid-air three-layer medium interlayer film echo signal, and recording an intersection position of a threshold voltage and the interpolated solid-liquid echo signal; moving the interpolated solid-liquid-air echo signal by taking the interpolated solid-liquid echo signal as a reference, so that the two echo signals are aligned; subtracting the solid-liquid echo signal after interpolation from the solid-liquid-air echo signal after alignment to obtain a liquid-air echo signal; and performing cross-correlation operation on the interpolated solid-liquid echo signal and the interpolated liquid-air echo signal to determine the thickness of the thin film. The problem that the reference signal and the echo signal are difficult to synchronize can be solved, and the thickness of the ultra-thin liquid film in the industry can be measured.

The invention relates to a device and a method for measuring the ablation thickness of a thermal protection layer of a metal cabin of an aircraft, belongs to the technical field of aerospace special parameter measurement, and solves the problems that an existing method for measuring the ablation amount of a dimensional ablative material needs to damage the structure and the integrity of a cabin wall surface, and the synchronism of a sensor and a measured thermal protection layer is poor. The invention discloses a device for measuring the ablation thickness of a heat-proof layer of an aircraft. The device comprises an ultrasonic transducer, a temperature sensor, an ultrasonic signal transceiver, a data acquisition device, a power supply, a data processing and display device, a special fixture and a screw, according to the invention, only the threaded hole fixing device needs to be arranged on the metal layer, the measurement can be completed without damaging the wall surface structure, the integrity of the metal cabin and any damage to the metal cabin of the aircraft, and the installation is convenient; according to the invention, the thermal protection layer of the metal cabin is directly measured, the limitation of a traditional trepanning measurement mode on the measurement position is broken through, and the synchronism is good.

The invention discloses a coaxial alignment device and a coaxial alignment method. The coaxial alignment device comprises a bearing, an adjusting mirror bracket, a display plate to be coaxially aligned, a microscopic system and a platform, an outer ring of the bearing is connected with the platform, an inner ring of the bearing is connected with the adjusting mirror bracket, and the adjusting mirror bracket is located above the bearing; the center of the display plate is provided with a center mark, and the display plate is connected to the center of the adjusting mirror bracket; and the microscopic system is erected above the adjusting mirror bracket and is used for observing the motion trail of the center mark of the display plate in the adjusting mirror bracket. According to the coaxial alignment device and the coaxial alignment method, the high precision of coaxial alignment can be met, meanwhile, the workload of adjustment and calibration personnel can be greatly reduced, the complexity and the cost of the whole mechanical structure are reduced, the external influence degree of the whole mechanical structure is reduced, and the stability is improved.

This application discloses a five-roll embossing machine, including a machine body, an embossing assembly, a paper feeding assembly, a main drive assembly, and a pressing roller. The embossing assembly includes five embossing rollers, a pair of main gears, and a pair of positioning assemblies. The pair of main gears are rotatably mounted on both sides of the machine body and driven to rotate by the auxiliary drive assembly. Each embossing roller is provided with a quick-release assembly at both ends. The quick-release assembly includes a bearing groove, a toothed cover, several pressure covers, and a fastening assembly. The fastening assembly achieves simultaneous locking of all pressure covers and toothed covers by a single bolt operation through a linkage. The main drive assembly drives the working position embossing roller and the pressing roller to rotate synchronously. The positioning assembly performs precise circumferential positioning of the main gears. This invention solves the problems of cumbersome roller changing, long time consumption, and low positioning accuracy of existing embossing machines, realizes quick roller changing by a single person and seamless switching of five patterns, and greatly improves production efficiency and equipment versatility.

The utility model provides an inclinometer with a water pressure and water level acquisition function, which relates to the technical field of hydraulic engineering and comprises a rod body, a first accommodating cavity for accommodating an acquisition mainboard is arranged in the rod body, and the acquisition mainboard is electrically connected with a communication cable mounted at the upper end of the rod body through a first through hole formed in the rod body; the switching circuit board is mounted at the top of the first accommodating cavity, an inclinometer is also welded on the switching circuit board, and the inclinometer is electrically connected with the acquisition mainboard; the pressure monitoring assembly is installed in a second containing cavity formed in the rod body, a second through hole is formed between the second containing cavity and the first containing cavity, the pressure monitoring assembly and the collecting mainboard are electrically connected through the second through hole, the space, except for the pressure monitoring assembly, of the second containing cavity is a water containing cavity, and a plurality of water inlet holes are formed in the water containing cavity; and the guide wheel structure is mounted on the outer surface of the rod body. The beneficial effects are that multiple parameters are measured at the same time, and the measurement efficiency and the data accuracy are improved; and the number of equipment and the purchase cost are reduced.

This invention discloses a pre-positioned steel support system suitable for small, ultra-deep foundation pits, comprising several lattice columns, several connecting devices, pre-positioned steel supports, several steel strands, several through-hole jacks, several servo cylinders, and a hydraulic system. The pre-positioned steel supports include a steel waler and several corner horizontal braces set at the four corners of the steel waler. Several servo cylinders are spaced along the circumference of the steel waler on its outer surface. The servo cylinders extend and retract under the action of the hydraulic system to achieve active deformation control of the diaphragm wall. Several through-hole jacks, under the action of the hydraulic system, simultaneously raise and lower the pre-positioned steel supports by synchronously extending and retracting the corresponding steel strands. This invention enables a construction method of pre-positioning concrete or steel supports for simultaneous excavation, lowering, and support, effectively shortening the construction period and reducing the time without support during over-excavation. It has advantages such as high mechanization, strong construction safety, and high turnover rate.

The invention relates to the technical field of internal mixers, and discloses an internal mixer for preparing a high-performance damping, shock-absorbing and noise-reducing rubber nano composite material, the internal mixer comprises a treatment cylinder, the bottom of the treatment cylinder is fixedly connected with a blanking pipe, the outer wall of the blanking pipe is provided with a valve, the outer side of the treatment cylinder is provided with a moving mechanism, and the top of the treatment cylinder is provided with a stirring mechanism; the stirring mechanism comprises a motor, the motor is fixedly connected to the top of the treatment barrel, the output end of the motor is fixedly connected with an output shaft, and a belt structure is arranged on the outer wall of the output shaft. The device has the characteristics of being high in practicability and good in mixing effect, by arranging the stirring mechanism and starting a motor to work, moving and rotating stirring of a stirring shaft and reciprocating stirring of a stirring frame can be achieved, and therefore high-performance damping, shock absorption and noise reduction rubber nano composite materials at multiple positions in a treatment barrel can be stirred and mixed; good machining quality is achieved, and the practicability of the device is improved.

The utility model provides a kind of vacuum chamber sealing door, including sealing cover and lifting mechanism, the front and back of sealing cover are equipped with the opening allowing material to go in and out;Two vertical sliding rails are equipped on the inner side wall of sealing cover, door frame is slidably installed on sliding rail, door body is slidably installed in door frame, limit block is equipped in sealing cover inside;Guiding hole is equipped in the side wall of door frame, guiding pin matched with guiding hole is equipped in the side wall of door body, sealing ring is equipped on the abutting surface of door body and sealing cover.The utility model determines the height position of door body by limit block, and utilizes the constraint of guiding hole, forcibly drives door body to move horizontally when door frame continues to drop, so that it is automatically pressed in the inner side of sealing cover opening, converts lifting movement directly into sealing pressing force, without additional pressing device, simplify overall structure and improve action reliability, significantly reduce the complexity of equipment, manufacturing cost and maintenance difficulty, while ensuring that sealing performance meets the stringent requirements of vacuum chamber.

The unfolding and locking mechanism suitable for the steering engine folding wing comprises a firer cylinder arranged at the end of a steering engine, the top of the firer cylinder is an open firer cavity, the middle of the firer cylinder is a connecting rod cavity, and the bottom of the firer cylinder is a sliding cavity; the combustion chamber is arranged in the firer cavity and is connected to a sliding sleeve in the sliding cavity through a connecting rod at the bottom; a plurality of through holes are formed in the bottom face of the combustion chamber and right face the pressure relief cavities in the bottom of the fire work cavity respectively. A plurality of hook grooves are formed in the side face of the sliding cavity, and hooks arranged in the hook grooves are arranged on the outer side wall of the sliding sleeve. And the hook is used for supporting the rear edge of the control surface in the hook groove, so that the control surface is overturned and unfolded based on a rotating shaft fixed with the steering engine. The locking device is simple in structure, good in synchronism and reliable in locking, is particularly suitable for guided ammunition folding wings which are large in impact magnitude, short in unfolding time and high in synchronism requirement, and has very high practicability and wide applicability.

The invention discloses a grid-connected inverter open-loop synchronization system suitable for a non-ideal power grid and a control method, and the method comprises the steps: carrying out the positive and negative sequence component decomposition of a common coupling point voltage dq axis component, extracting the positive sequence component, carrying out the filtering and phase compensation of a moving average filter (MAF), obtaining a system synchronization phase angle correction value, and carrying out the phase compensation of the system synchronization phase angle correction value. A grid-connected inverter switching tube of the system is controlled by adopting an open-loop synchronization technology, higher harmonic components in voltage alpha and beta signals are eliminated, the synchronization effect is improved, and the power supply quality of the system is improved. The device is simple in structure and easy to implement, alphabeta component higher harmonics in voltage can be eliminated, the synchronization effect is improved, and the electric energy quality and stability of a grid-connected inverter system are improved.

The application discloses a kind of block storage performance automation test method, system, storage medium based on FIO, it is related to cloud computing and storage performance test technical field, it is applied to the cloud platform environment including management node and multiple test nodes.By running environment deployment script on management node, automatically complete test node IP management, SSH password-free configuration, firewall processing and according to X86 / ARM architecture adaptive deployment FIO;Run test execution script, precheck is carried out to test disk and time synchronization, start FIO service on multiple nodes according to preset task queue, in turn complete the stress test of covering 4K / 32K / 128K / 1M block size and random, order, 7:3 mixed read-write scene;Run result arrangement script, automatically parse FIO log, extract and uniformly output the IOPS, bandwidth and latency index of each scene.The method reduces manual operation while improving the consistency and result reliability of block storage performance test.

The present invention relates to an automatic packing system and a packing method for bricks, comprising a brick splitter, an industrial robot, a stacking robot which is rotatably fixed with the mechanical arm of the industrial robot, a turntable device, an automatic packer, a blank vehicle and a forklift; bricks are placed on the blank vehicle; the brick splitter is used to split the bricks and reserve holes for forklifts; the stacking robot can clamp bricks and close the gaps between the bricks; the stacking robot can move the bricks on the blank vehicle to the brick splitter or the turntable device, or move the bricks on the brick splitter with reserved holes for forklifts to the turntable device; the turntable device can rotate 90 degrees to facilitate the packing of the brick stacks formed after the bricks are stacked on both sides; the automatic packer is used to pack the brick stacks on the turntable device; and the forklift is used to transfer the packed brick stacks.