641 results about "Fast speed" patented technology

The invention includes a mutant Taq polymerase, which can significantly extend and amplify a target sequence where the extension conditions are time limited to as little as one second. The mutant Taq polymerase, or a biologically active fragment thereof, has one or more substitutions differing from the wild type as shown in Table I.

The invention belongs to the technical field of mechanical lifting platforms, and particularly relates to a pushing chain type synchronous lifting platform and a control method.The synchronous lifting platform is formed by combining two lifting platform bodies, and each lifting platform body comprises a pushing chain driving system and a guiding mechanism; the multi-axis virtual axis electronic gear is combined with a fuzzy reasoning library to realize synchronous accurate control of the double servo motors, and the synchronous control system has the advantages of high speed, high bearing capacity, multi-point control, high precision, low initial height, large stroke, small occupied space, no maintenance, high efficiency, energy conservation and the like.

The utility model relates to a handcart type switching device for power supply or distribution, in particular to a circuit breaker. The circuit breaker comprises a fixed base, a mechanism box and a three-phase solid-sealed polar pole are arranged on the fixed base, an opening and closing mechanism for driving the three-phase solid-sealed polar pole to conduct opening and closing is arranged in the mechanism box, and the opening and closing mechanism comprises an electromagnetic mechanism and a permanent magnet maintaining mechanism which are integrated in the mechanism box and used for driving the closing action. An output shaft is arranged on a movable iron core of the electromagnetic mechanism, the permanent magnet holding mechanism and the repulsive force mechanism both act on the output shaft, so that each stage in the opening and closing process can be rapidly completed, the repulsive force mechanism is high in response speed, needed repulsive force can be rapidly generated, and the reliability of the opening and closing operation is improved. The permanent magnet holding force is overcome, rapid opening is realized, the opening time is shortened, and the opening speed is obviously improved.

The embodiment of the invention provides a silicon wafer lifting method and a silicon wafer, and the method comprises the steps: completely cutting a crystal bar into silicon wafers through a cutting line, and controlling the silicon wafers to move upwards; and in the process of controlling the silicon wafer to move upwards, controlling the cutting line to alternately and circularly move in the positive and negative directions. According to the silicon wafer lifting method provided by the embodiment of the invention, the contact area of the silicon wafer clamping the cutting line is smaller by utilizing the characteristic that the wire bow of the forward and reverse routing is smaller than that of the one-way routing, so that the probability that the cutting line forms scratches on the surface of the silicon wafer in the lifting process can be reduced, the condition of wafer falling during lifting can be reduced, and the lifting efficiency of the silicon wafer is improved. The method has the advantages of fast speed increase, high surface quality of the prepared silicon wafer and small secondary damage.

The invention belongs to the technical field of traffic intelligent perception, and particularly relates to a road area traffic perception and intervention low-speed operation vehicle collision early warning system and method, and the system comprises a data collection module, a data transmission module, a data processing module, a collision risk judgment module and an early warning information issuing module. Data used by the method are collected data of millimeter wave radar and camera detection equipment installed on a movable device, the method is convenient and rapid to use, real-time radar data is adopted, the method has the characteristics of high detection precision and high detection speed, real-time video data is adopted, the method has the characteristics of light weight and low deployment cost, and the method is suitable for popularization and application. And real-time sensing of vehicle position and size information, weather information and personnel position information can be realized through the edge calculation unit. And the constructor out-of-bound early warning module can judge the position information of the constructors according to the outer contour of the construction operation area and perform early warning prompt on the constructors exceeding the construction operation area, so that the possible interference of the constructors on traffic operation is reduced.

The invention aims to provide a virtual simulation method of a diesel engine movement mechanism considering rotation speed fluctuation. The method comprises the following steps: acquiring structure and material parameters of a valve mechanism, acquiring contact parameters of the valve mechanism, acquiring cam lift data, acquiring rigidity damping parameters and structure parameters of a gear transmission system, and acquiring cylinder pressure data. The output torque of a gas distribution unit, the angular acceleration of a cam shaft and the angular acceleration and torque of each gear are predicted respectively, the load torque state is judged, the crankshaft rotation angular acceleration is predicted, and the crankshaft dynamic angular velocity and the angular velocity fluctuation quantity are calculated. All motion mechanisms of the diesel engine are included, all kinetic parameters of the motion mechanisms of the diesel engine can be predicted, and the prediction result is complete. The influence of crankshaft rotating speed fluctuation caused by the load on the kinetic parameters of the diesel engine movement mechanism is considered, and the prediction result better conforms to engineering practice. Complex mathematical theories are not needed, a common numerical method can be adopted for solving, the calculation scale is small, and the calculation speed is high.

An indoor simulation device and method for a wheel rolling on an icy and snow-covered road surface. The temperature, humidity, and the surface temperature of the test piece in the experimental chamber are respectively collected by a temperature sensor, a humidity sensor, and an infrared temperature sensing device. Then, the start and stop of the snow-making system are controlled through a control box, so as to adjust the experimental environment to meet the conditions of simulating harsh winter driving conditions such as snowfall and freezing rain. Finally, the start and stop of the wheel rolling device are carried out. The snow-making system of this device has the advantages of good refrigeration effect, fast cooling speed, and can reach -196°C. At the same time, this device can simulate the process of a wheel rolling on the road surface during actual driving, and is used to evaluate various fast, effective, and environmentally friendly snow removal methods and the anti-slip performance of the road surface after the wheel rolls on the road surface indoors.

According to the method, a fuzzy subset is set according to the required torque, the current SOC value and the difference value between the engine rotating speed and the motor rotating speed, and the torque of an ISG motor is dynamically adjusted through a fuzzy control algorithm. The fuzzy control adopts a fixed fuzzy rule, so that a Q table is established through a Q learning algorithm, the compensation torque of the ISG motor is obtained, the final output torque of the ISG motor is determined to be the sum of the output torque of the fuzzy controller and the compensation torque output by the Q learning algorithm, and the torque output by the ISG motor is determined. According to the method, the advantage of high response speed of the torque of the motor is utilized, the difference value between the required torque and the actual torque is effectively compensated, the rotating speed fluctuation of the engine caused by overlarge change of the torque of the engine is avoided, and the fuel economy and the driving operation stability are improved.

The utility model discloses a centering positioning mechanism which comprises positioning blocks arranged in pairs, the positioning blocks are arranged on a guide rail sliding block, and the guide rail sliding block is arranged on a linear guide rail. The positioning blocks are connected with a ball screw assembly, the ball screw assembly is provided with a ball screw, the ball screw is provided with a left-hand thread and a right-hand thread, and the ball screw rotates to drive the paired positioning blocks to move in the middle at the same time or move away from the middle in the reverse direction. According to the centering and positioning mechanism, the positioning blocks are arranged in pairs to clamp the steel backing, the ball screw is driven to rotate, the ball screw is provided with the left-hand thread and the right-hand thread, the two positioning blocks can be driven to move in a centering mode at the same time or move away from the middle in the reverse direction, clamping and positioning of the steel backing are achieved, the positioning precision is high, and the positioning speed is high; rigid positioning is achieved through the ball screw, and reliability is high.

The present application relates to a kind of narrow body vehicle balance control method based on control moment gyro, belong to narrow body vehicle active roll control system field.The dynamics equation of control moment gyro is established, the active roll dynamics model of narrow body vehicle is calculated to obtain the roll angle error and roll angular velocity error of vehicle, then the active roll controller is designed using sliding mode control method to control the roll angle error and roll angular velocity error, and the rotational angular velocity of control moment gyro frame is obtained;Finally, the control moment gyro on narrow body vehicle is adjusted in real time, and vehicle balance is realized.The vehicle roll scheme in the present application uses control moment gyro device, with high control precision, fast response speed, and independent of suspension system, can realize greater balance torque.By controlling the frame angular velocity of control moment gyro, the dynamic balance of narrow body vehicle when steering can be realized, to assist the safe steering of driver.

The invention discloses a vehicle control method, a computer readable storage medium, a controller and a vehicle, and the vehicle control method comprises the steps that when it is determined that the vehicle is in a floating state, a load module in the vehicle is controlled to move, so that the vehicle is adjusted to a second posture from a first posture. According to the vehicle control method, when it is determined that the vehicle is in the floating state, the load module in the vehicle is controlled to move, the gravity center of the whole vehicle is adjusted, control over the floating posture of the vehicle is achieved, and the vehicle control method has the advantages of being high in leveling speed, low in cost, good in platform expansibility, high in engineering application and low in matching work amount.

The invention discloses an electronic wedge brake system of a sprung actuator. An angle module part, a vibration reduction system, an electronic wedge brake system, a wheel unit and a steering system are integrated. The system executes braking work completely through a mechanical and electrical integration device, compared with an electro-hydraulic braking system, a hydraulic pipeline device is omitted, and the system has the advantages of being few in structural parts and high in response speed; compared with an existing electronic mechanical braking system, the scheme of the sprung actuator is adopted in the system, the braking execution motor and the planetary gear reducer are installed on the angle module supporting arm, braking torque is transmitted to the electronic wedge-shaped braking device through the universal transmission device, and the electronic wedge-shaped braking device is made to complete service braking work. And meanwhile, the electronic wedge-shaped braking device is arranged on the virtual main pin axis, and the problem that braking torque transmission is unstable under the steering working condition can be effectively solved. According to the system, unsprung mass can be effectively reduced, the driving operation stability is improved, the wheel side space is saved, and the arrangement problem of all systems of a distributed driving wheel side is solved.

The invention relates to a three-channel loading station and method with loading capacity exceeding ten thousand tons per hour, which comprises a steel structure frame, a first channel, a second channel and a third channel, and a transition chute is arranged between a surge bin and a discharge chute of the third channel. One-time weighing of the quantitative bins of the first channel and the second channel is a large part of a carriage, one-time weighing of the quantitative bin of the third channel is a small part of the carriage, and at least one-time weighing of the quantitative bin of the third channel can be contained in the transition chute. The three buffer bins, the quantitative bin discharging chutes and the transition chute specially arranged on the third channel are utilized, the efficient loading requirement of the heavy-load train exceeding ten thousand tons is met in a three-channel alternate operation mode, the loading capacity reaches 10,000-13,000 t / h, the loading speed ranges from 1.5 km / h to 2 km / h, and whole-column loading of the heavy-load train of 30 thousand tons can be completed within about 2 hours. The loading speed is high, the loading capacity is large, the adaptive capacity is high, the transportation efficiency is remarkably improved, and the logistics cost is reduced.

The utility model provides a hydraulic control two-wheel belt sander and a polishing system, which comprises a driving mechanism, a hydraulic control mechanism and a belt sander, the polishing mechanism comprises abutting wheels and abrasive belts, the abutting wheels and the driving wheels are arranged at intervals, and the abrasive belts are arranged on the abutting wheels and the driving wheels in a sleeving mode; and the force control mechanism comprises a control assembly and an adjusting assembly, the adjusting assembly is connected to the driving mechanism and the polishing mechanism, and the control assembly comprises a force sensor, a displacement sensor and a central control module. Driving force is provided for the polishing process of the polishing mechanism through the driving mechanism, in the process, the force control mechanism can adjust the operation position of the polishing mechanism so that the polishing mechanism can keep high precision and high rigidity of polishing all the time, the force control mechanism can conduct self-adaptive adjustment on the process, and the polishing precision of the polishing mechanism is improved. Therefore, the method has the advantages of high response speed, accuracy and high efficiency. Compared with conventional grinding equipment at the present stage, the grinding equipment has the remarkable advantages in the aspects of grinding quality, the regulation and control process, the machining efficiency and the like.

The invention provides a design and application method of a sliding-mode deadbeat reaching law, and relates to the technical field of electrical engineering, and the method comprises the steps: designing a sliding-mode deadbeat reaching law SMDRL, designing a control strategy through a deadbeat control principle, defining a state change law on a sliding-mode surface through a sign function, and achieving the design of the sliding-mode deadbeat reaching law SMDRL. It is ensured that the system state converges to the sliding mode surface at the fastest speed in a control period; an improved sliding mode deadbeat reaching law ISMDRL is designed, a traditional sign function is replaced with a hyperbolic tangent function, and parameters of the hyperbolic tangent function are adjusted according to the system state; the SMDRL and the ISMDRL are applied to a speed driving system of a permanent magnet synchronous motor (PMSM), and the speed driving system comprises a PMSM mathematical model, a sliding mode speed controller with a speed disturbance observer and model prediction current control. The SMDRL is introduced from the traditional sliding mode reaching law for the first time through theoretical derivation, the convergence time of the SMDRL is the shortest, and the SMDRL is applied to a permanent magnet synchronous motor speed driving system.

The invention discloses a high-reliability quick electric firing device, which comprises a firing unit, the firing unit comprises a pull ring, a firing bin, a gas cylinder bin, a limiting unit, a first spring, a pull rod and a firing pin, one end of the firing bin is rotationally clamped and connected with the pull ring, the other end of the firing bin is connected with the gas cylinder bin, the first spring, the pull rod and the firing pin are arranged in the firing bin, one end of the pull rod is connected with the pull ring, and the other end of the pull rod is connected with the limiting unit; the two ends of the first spring abut against the firing bin and the firing pin respectively, the firing pin conducts axial movement limiting through the pull rod, the end, away from the first spring, of the firing pin is a sharp end and faces the gas cylinder bin, a limiting groove is further formed in the firing pin, and the limiting unit comprises a motor and a limiting assembly; the launching unit is detachably connected with the gas cylinder bin and comprises a gas cylinder connecting unit, a connector and a launching head, the gas cylinder connecting unit and the launching head are both detachably connected with the connector, and the gas cylinder connecting unit is further used for mounting a gas cylinder and launching the launching head when the firing pin is used for firing and puncturing the gas cylinder. Response speed is fast, safety and reliability are high, and cost is low.

A traveling device and a self-moving plunger pump. The traveling device comprises a working platform (10) and a traveling assembly, wherein the traveling assembly is arranged below the working platform (10); and a power driving assembly, a plunger pump assembly (20) and a control assembly (30) are provided on the working platform (10). The plunger pump is integrated in the traveling device, such that the plunger pump can autonomously move underground without depending on pulling apparatuses such as rails and winches any more, thereby avoiding the risk of safety accidents such as vehicle rolling and rope breakage during an apparatus pulling process, thus achieving the characteristics of a fast movement turn-around speed and flexible movement, and facilitating an improvement in the production efficiency and a reduction in the production cost.

This invention relates to a high-speed sweeper, comprising a dust collection device (6) and a sweeping device (7) disposed below a chassis (1); the dust collection device (6) includes a plurality of suction ports (62), a front rubber plate (63), a side rubber plate (64), and a roller brush (67) mounted on a suction cup body (61); the sweeping device (7) includes two front sweeping discs (71) and two rear sweeping discs (72); wherein the outermost edges of the two rear sweeping discs (72) respectively cover more than 1 / 3 of the area from the center to the outermost edge of the corresponding front sweeping disc (71) in the left and right directions; the suction area of ​​the suction cup body (61) respectively covers more than 1 / 4 of the area from the center to the outermost edge of the rear sweeping discs (72). This invention provides a high-speed sweeper with fast suction speed, no missed areas during high-speed sweeping, high sweeping efficiency, and good cleaning effect.

The invention provides a reverse pull rod center valve type hydraulic brake master cylinder, which is characterized in that a secondary piston and a primary piston are arranged in a cylinder body and are connected through a spring and a connecting rod; a reverse pull rod center valve type device serves as a core, is composed of a return spring, a pull rod, a valve seat, a sealing spring and the like and is of a plane sealing structure. The master cylinder solves the problems that a traditional brake master cylinder is lagged in response and unstable in braking. During braking, the push rod pushes the piston, the valve type device rapidly closes the channel, and high pressure is established to achieve braking. And braking is relieved, the piston resets under the action of the spring, the channel is opened, and oil flows back. The brake device has the advantages of high response speed, good sealing performance, efficient space utilization, low cost, stable and safe braking and the like, and meets the performance improvement requirement of a brake system.

According to the differential wheel limiting detection device and method, the rotating direction and the rotating speed of a wheel set can be limited in advance before the differential wheel moves in two directions and collides with a hard limit, so that the control performance of a vehicle is improved, the situation that an oil cylinder and the like fall off due to collision with the hard limit when the speed is high is avoided, and the problem that a traditional differential wheel set is poor in safety is solved. The system has the advantages of quick response, high safety, simple structure and the like, and is suitable for differential wheel control systems of equipment such as AGVs (Automatic Guided Vehicles) and mobile robots.

The application relates to the field of network security, in particular to an IPSec anti-replay detection method based on multiple caches. The latest window information which has not been stored in DDR is cached by means of the cache space of FPGA. When the sn window information of the previous message is not updated in the algorithm decryption stage, the un-updated sn window information is stored in the cache space of FPGA, the anti-replay detection of the next message is not affected, the processing time of two messages is shortened to the algorithm processing time, the preparation time before the algorithm decryption is greatly compressed, the method has the characteristics of fast speed, less resource occupation and the like, and is suitable for devices which have strict performance requirements and need to perform anti-replay detection.

The application discloses a rope climbing device, which comprises a moving chassis, a supporting roller mechanism and at least two power mechanisms, wherein the rollers of the supporting roller mechanism are used for rolling along the handrail ropes to bear the moving chassis to move along the handrail ropes; each power mechanism comprises a power piece and a power roller connected with each other, the power piece is arranged on the moving chassis and is used for driving the power roller to rotate; wherein the power rollers of the two power mechanisms are used for being oppositely or oppositely pressed on two parallel handrail ropes to enable the power piece to drive the power roller to roll along the handrail ropes. Under the action of the power mechanisms, the moving chassis can continuously move along the handrail ropes. Obviously, the rope climbing device has the advantage of fast climbing speed, and correspondingly, the working efficiency of the main cable maintenance robot is improved.

This invention discloses a CVT drive clutch with downhill braking function, relating to the field of clutch technology. It includes a drive shaft, with a drive wheel assembly and a transmission wheel assembly connected to its two ends respectively. A braking assembly is provided between the drive wheel assembly and the transmission wheel assembly. The braking assembly includes a one-way bearing sleeved on the drive shaft; a bearing housing is sleeved on the outside of the one-way bearing; the inner ring of the one-way bearing is fixed to the drive shaft, and the outer ring of the one-way bearing is fixed to the bearing housing; a flange sleeve for connecting a drive belt is slidably sleeved on the outside of the bearing housing; the outer ring of the flange sleeve near the drive wheel assembly has a protruding structure for blocking the drive belt; an annular guide slider is sleeved on the outside of the bearing housing near the drive wheel assembly. The advantages of this invention are: it can achieve braking by clamping both sides of the drive belt, with fast response speed, good braking effect, and high reliability.

The invention relates to a fast latch based on logic isolation. The fast latch comprises a transmission gate module which adopts a plurality of transmission gates controlled by clock signals to transmit input signals to corresponding generation nodes. The generation module is used for generating a feedback node signal by adopting a plurality of mutually connected phase inverters; the feedback module is used for receiving feedback node signals and feeding back each feedback node signal to a corresponding generation node by adopting a cross feedback loop, and in a normal working state, when a clock signal is at a high level, the fast latch works in a transparent mode; when the clock CLK is at a low level, enabling the fast latch to work in a holding mode; and when a single node or double nodes are overturned, the quick latch is self-repaired. According to the latch, logic isolation is realized through a cross feedback loop, and soft errors can be repaired and correct data can be stored even if a radiation event occurs; the fast latch can provide complete DNU elasticity, and has a faster speed and a smaller area.

The invention relates to the technical field of power system control, and discloses a wind turbine generator target type pitch angle cooperative control method and system for the high-frequency problem of a sending-end power grid and a medium. According to the wind turbine generator target pitch angle cooperative control method for the high-frequency problem of the sending-end power grid, target pitch angle control is adopted, and a plurality of target values of wind turbine generator pitch angle changes participating in high-frequency problem adjustment can be determined, so that the active output of a wind power plant is reduced at the fastest speed, the output of the wind turbine generator is reduced more quickly, and the wind power generation efficiency is improved. The frequency rising trend is effectively slowed down, the rotating speed of the rotor is improved in cooperation with rotor kinetic energy control, the rotating speed of the rotor can be effectively improved after the frequency crosses the highest point, and the pitch angle is kept at a large value, so that the frequency modulation participation time of the wind turbine generator is remarkably prolonged, the frequency maximum value can be more effectively reduced, and the frequency tends to be gentle more quickly; and the control effect of wind power participating in high-frequency regulation of the sending-end power grid is improved.

A special gauge for rapidly detecting the shape and size of an automobile front axle comprises a base, a left limiting block, an inclined plane supporting block, a right limiting block, a double-axis sliding block, a sliding block baffle and a forge piece, the section structure of the base is of a U-shaped structure, and the left limiting block and the double-axis sliding block are installed at the left end and the right end of the base respectively. A bevel supporting block is installed in the middle of the base, a right limiting block is installed on the upper surface of the double-axis sliding block, a sliding block baffle is installed on the edge of the double-axis sliding block, and a forge piece is installed between the left limiting block and the right limiting block. The device is high in detection speed, low in manufacturing cost and good in environment adaptability; and the training cost is low.

The present invention relates to the field of battery technology, and more particularly to a battery intelligent discharge control method, system, and charging and discharging device. The method includes inserting a device into a port for protocol identification, calculating the remaining maximum power of the current theoretical output based on the maximum output power; when the remaining available power cannot meet the port power requirements under the condition that each port has a reserved minimum output power, the remaining available power is allocated to other ports according to the reserved minimum power, and the actual output power of the port is obtained by subtracting the sum of the minimum powers of other ports from the remaining available power; and monitoring the actual discharge power of each port in real time, and limiting the maximum discharge power of other ports based on the actual discharge power. This invention utilizes an intelligent power allocation method to dynamically adjust power output based on the power requirements of connected devices, ensuring that each device can charge at the fastest speed and improving charging efficiency.

The invention provides a high-side driving circuit device and method for overcurrent protection and a vehicle, and belongs to the technical field of vehicles. The device comprises a power supply module, an overcurrent protection module, a high-side driving module and a regulation and control module. A regulation and control module is connected with the input end of a high-side driving module, a regulation and control signal is output, on-off of the high-side driving module is controlled according to the regulation and control signal, a driving function is achieved, the high-side driving module is connected with a power module through an overcurrent protection module, the overcurrent protection module detects driving current of a driving power supply, and according to the driving current, on-off of the high-side driving module is controlled. On-off of the driving power supply is controlled, so that on-off of output of the driving power supply to the power supply load is controlled; the over-current protection circuit is constructed by using discrete devices instead of a special high-side driving chip, can trigger the turn-off protection in an over-current scene while realizing the basic function of high-side driving, does not need software monitoring and control, and is high in response speed, high in reliability and low in cost.

The invention provides a control method and device of a braking system, electronic equipment and a storage medium, and belongs to the technical field of automobile braking, in the method, a collaborative architecture of AI dynamic prediction, 14-degree-of-freedom physical model constraint verification and multi-target model prediction control is adopted to carry out coupling analysis on road condition-vehicle-tire data, and a control result of the braking system is obtained. Wherein in the multi-objective model prediction control, optimization objectives comprise brake distance error, wheel cylinder pressure change rate, yaw velocity and energy recovery efficiency, the process retains the advantage of processing complex nonlinearity by AI, and the obtained four-wheel adaptive optimal brake pressure distribution scheme ensures physical rationality and also has the optimal brake pressure distribution effect. The electro-hydraulic servo braking system has the advantages that multi-dimensional optimal balance of braking distance, stability, comfort, energy efficiency and the like is achieved, the self-adaptive capacity is good, the response speed of electro-hydraulic servo braking is high, and the collaborative requirements of functional safety and energy recovery in an automatic driving scene can be met.

This application relates to the field of hydraulic technology for injection molding machines, and provides a high-speed, precision mold-opening control circuit board. In use, the hydraulic fluid enters the P port of the first directional valve from the main return port. Adjusting the valve core position directs the fluid to the A / B ports of the first directional valve, entering the rodless / rod-side connection port, thus supplying oil to the rodless / rod-side chambers of the mold-locking cylinder. Simultaneously, oil from the rod / rodless chambers of the mold-locking cylinder discharges to the rod / rodless interface, allowing the fluid to flow to the T port of the first directional valve. Because a differential circuit is provided, activating the differential circuit connects the passage between the A port of the first directional valve and the rodless / rodless connection port with the passage between the T port of the first directional valve and the main return port. This allows the fluid entering the rodless / rodless chamber of the mold-locking cylinder simultaneously with the fluid entering the rodless / rodless chamber, creating a confluence effect that enables the mold-locking cylinder to move at a faster speed, improving production efficiency.