166results about How to "Realize the control effect" patented technology

The invention discloses a terminal control method, a terminal control apparatus and a system, belonging to the field of computer networks. The method comprises the following steps that: a gateway device establishes a network connection with at least one third party intelligent terminal, at lest two third party intelligent terminals adopting different third party transmission protocol and / or different third party message format exist; the gateway device acquires a primitive control message, wherein the primitive control message is the one adopting a gateway side transmission protocol; the gateway device converts the primitive control message into a third party control message, wherein the third party control message is the one adopting the third party message format; the gateway device transmits the third party control message to the third party intelligent terminal through the network connection. The method, the apparatus and the system, provided by the invention, solve a problem that the same manufacturer has difficulty in simultaneous manufacturing of the intelligent terminals of all types and application range of the current smart home system is limited, and achieve the effect of implementing unified management and control even if the third party intelligent terminals are manufactured by different manufactures.

The invention provides an energy-saving and stable distributed-type electric automobile driving control method. The energy-saving and stable distributed-type electric automobile driving control methodcomprises the following steps that, 1, longitudinal force is estimated; 2, the yaw velocity and the side slip angle are estimated; 3, an upper layer controller is designed; and 4, a lower layer controller is designed. According to the energy-saving and stable distributed-type electric automobile driving control method, vehicle yaw stable control and energy optimization are effectively combined together, and the multi-objective vehicle control effect under a single control strategy can be achieved; in the energy optimization process, the energy-saving effect brought by optimizing distributionof torque of front and rear wheel hub motors is taken into account, the theoretical foundation and feasibility of achieving energy saving through the torque in the steering process are further proved,and a new torque optimizing distribution scheme which takes stability, motor energy saving and steering energy saving into account is provided. The energy-saving and stable distributed-type electricautomobile driving control method can be used for replacing a GPS and an inertial navigation device to obtain the vehicle yaw velocity and the side slip angle, the estimated cost is reduced, and the foundation is provided for vehicle control.

The invention relates to an energy management method for an electric quantity maintaining stage of an external charge type hybrid vehicle, which comprises the following steps: designing integrated control curves of each shift according to an optimal fuel economy curve of an engine of a target vehicle and the speed ratio of a speed changer; and designing a control method of the shifts of the speedchanger, the opening of an electronic air throttle of the engine and the torque of a motor by using the opening of an accelerator pedal, the vehicle speed and the charge state value of a storage battery as control parameters. The method can control the electronic air throttle of the engine, the torque of the motor and the shifts of the speed changer in real time so as to ensure that the engine canrun along an optimal efficiency curve. When the advantages of high transmission efficiency, low cost, and the like of an electric control type automatic transmission are exerted, the control effect of a conventional stepless transmission is realized, and the defects of complicated manufacturing process, high manufacturing cost, low strength of a transmission belt, short service life, and the likeare also avoided.

The invention provides an antitumor prodrug with novel amphiphilic hyper branched polyester as a carrier and a preparation method thereof. The novel biodegradable amphiphilic hyper branched polyester is constructed as being based on dimethylol propionic acid, an oligomer of glycolic acid or lactic acid and polyethyleneglycol or polyethylene glycol monomethyl ether. A peripheral functional group of the obtained hyper branched polymer is a hydroxyl group. The hyper branched polymer is reacted with estolide to be transformed into the hydroxyl group, the hydroxyl group is esterified with antitumor drug with the existence of condensing agent to obtain a prodrug of the antitumor drug. The introduction of the oligomer of the glycolic acid or the lactic acid or an alternative oligomer thereof improves the biocompatibility of drug carrier material, and the degrading speed of the oligomer in body is controlled by regulating the polymerization degree and the chemical composition of the oligomer to realize the action of controlling the release speed of the drug, so that the invention has very good drug sustained controlled release action and avoids the toxic side effect to normal cells caused by the burst release of the antitumor drug. The prodrug has an amphiphilic property, so that the prodrug can be made into a water-based preparation and improves the hydrophilicity of the antitumor drug greatly.

The invention discloses a self-actuated air flow control pipe fitting. The pipe fitting comprises a tubular valve body and an air inlet orifice plate and an air outlet orifice plate; the air inlet orifice plate is sealed by one end of a conical valve core which is matched with a moving orifice plate and a spring in the valve body, and the other end extends into the air outlet orifice plate to form an outlet circulation annular space. Air flow passes the air inlet orifice plate to propel the conical valve core to shift along the flow direction, thus changing area of the circulation annular space. The area of the circulation annular space decreases if the air flow pressure increases; the area of the circulation annular space increases if the air flow pressure decreases; meanwhile, adjustment and control of the self-actuated flow rate are realized by dynamic compensation of the compression force of the spring and change of equilibrium pressure. The pipe fitting is characterized in that the pipe fitting is only provided with an air chamber, and one valve core in the air chamber has both functions of starting a self-actuated valve and adjusting the flow rate, thus the pipe fitting has the advantages of simple and compact structure, small size, and convenient manufacture and use, and the pipe fitting is especially suitable for the flow control within the exhalation pressure range.

The invention discloses an automatic driving control method and system based on vehicle-road cooperation. The method comprises the steps that a blind area detection device sends blind area obstacle information to road end detection equipment, the blind area detection device comprises a monocular camera and a laser radar which are built on a crossroad, and the blind area obstacle information comprises the type, the position and the speed of a blind area obstacle; the roadside detection device receives the blind area obstacle information and then broadcasts the blind area obstacle information toan OBU installed on the automatic driving vehicle; the OBU on the automatic driving vehicle sends the received information to a V2X module of the automatic driving vehicle; a V2X module of the automatic driving vehicle analyzes the received information and sends the analyzed information to an automatic driving control module of the automatic driving vehicle, and the analyzed information comprisesthe type, the position and the speed of a blind area obstacle; and an automatic driving control module of the automatic driving vehicle plans an automatic driving path according to the analyzed information. The safety of the automatic driving automobile can be improved.

The invention provides a passive fault-tolerant control method of an automotive active suspension and relates to the technical field of automobile suspension control. The fault pre-considered passive fault-tolerant control method of the automotive active suspension is offline designed by using the active suspension of the automobile as the research object, combining the shortcomings or defects existing during completed fault-free component and part based research by combining current automotive active suspension control based on a fault-tolerant control theory, using the reliability and usage quality improvement of automotive active suspension control and suspension design method optimization as targets, avoiding parameter perturbation and actuator faults of the automotive active suspension and meanwhile considering time-domain hard constraints of a suspension system. The passive fault-tolerant control method can ensure the stability and safety of the active suspension system, and the taking comfort and control stability of an automobile are improved.

The invention provides a residential area access control system based on face recognition, and belongs to the field of access control. The residential area access control system comprises a controller module, a database module, a face recognition module, a power source module, an action execution module, an infrared induction module, a video collecting module, a wireless communication module, a householder remote module and an inquiry display module. The output end of the face recognition module, the output end of the video collecting module and the output end of the infrared induction module are connected with the input end of the controller module, the database module is connected with the controller module, the input end of the action execution module is connected with the output end of the controller module, the inquiry display module is connected with the controller module, the output end of the power source module is connected with the controller module for power supply, the wireless communication module is connected with the controller module, and the wireless communication module is wirelessly connected with the householder remote module. The problems that an existing access control system is inconvenient and has potential safety hazards are solved.

The invention discloses a communication protocol configuration method and device based on OPC UA. The method comprises the following steps: collecting first data of at least one terminal device; mapping the first data into a data object in the OPC UA; adding the data object as a node into the address space of the OPC UA; forming profiles; mapping data acquired through different communication protocols to an OPC UA address space; forming a data mapping configuration file from different communication protocols to a data table structure according to the corresponding relationship. By setting theconfiguration file, flexible configuration of the whole process from different communication protocols to OPC _ UA protocol data transmission and data database storage is realized, and the efficiencyof unified acquisition, transmission, storage and analysis of various automatic equipment data at the bottom layer is improved, so that the production efficiency is improved.

The invention discloses a high-intensity magnetic field assisted pulsed laser deposition system which comprises a pulse laser, and a pulse laser deposition columnar vacuum chamber, wherein the pulse laser deposition columnar vacuum chamber comprises a double-layer jacket type columnar cavity with water cooling, the double-layer jacket type columnar cavity is placed in a boring hole of a superconducting magnet, a substrate heating platform or laser heating platform and a rotating mechanism thereof are arranged on a flange at one side of the double-layer jacket type columnar cavity, a target assembly and a moving / rotating mechanism thereof are arranged on a flange at the other side of the double-layer jacket type columnar cavity, the substrate heating platform or laser heating platform and the target assembly are positioned at the middle of a strong magnetic field of the superconducting magnet, the pulse laser deposition columnar vacuum chamber is integrally arranged on a sliding guide rail, and a closed laser guide cavity and a vacuum sealed video device guide cavity are arranged on a flange at one side. The high-intensity magnetic field assisted pulsed laser deposition system is low in manufacture cost, reasonable in structure, simple and convenient to assemble and operate, and stable and reliable in working, can be used for in-situ growth and post-annealing thermal treatment of a pulse laser deposition film under the strong magnetic field, and realizes a control function of a microstructure and a physical property of the material.

The invention discloses a safety control system for a fork of a forklift and a method of the control system. A controller acquires a fork angle signal detected by a tilt angle sensor, a fork altitudesignal detected by an altitude switch and a fork load signal detected by a load sensor, controls the opening changes of a forward tilting solenoid valve, a backward tilting solenoid valve, a lifting solenoid valve and a falling solenoid valve, and realizes a fork extreme position buffer function, a fork forward tilting angle limiting function, a fork backward tilting speed limiting function and afork one-key leveling function. The safety control system and the method realize fork low-position buffer control, high-altitude forward tilting angle control, backward tilting speed control and one-key leveling control, so that the safety, the comfort and the convenience of drivers are improved.

The invention relates to a control method of an ultra-high direct-current transmission voltage, which is characterized by comprising the following steps: (1) in a pole control system on the inversion side, calculating the voltage drop between a direct-current line and an earthing pole line according to the direct current and direct-current voltage of the local pole, the direct current of the opposite pole and the direct-current voltage of the opposite station, and setting the reference value of the direct-current voltage as the voltage level of the single valve bank on the rectifying side; (2) and subtracting half of the voltage drop between the direct-current line and the earthing pole line from the reference value of the direct-current voltage to obtain the control device voltage reference value of each valve bank, controlling the direct-current voltage on the two ends of the local valve bank to the obtained voltage reference value, and determining the operating voltage level on the rectifying side by using the direct-current voltages of the two valve banks. The invention solves the technical problems in rectifying-side fixed current control and inversion-side fixed voltage control in the ultra-high direct-current transmission engineering.

The invention discloses a rural sewage wastewater recycling system with remote monitoring function, comprising a water inlet, a filter mesh, a sewage pool, a conveying pipe, a water pump, a mixed mud precipitating pool, a valve, a pressure sensor, a dewatering pool, a sterilizing tank, a sludge collector tank, nozzles, a controller, a storage battery, a support, a solar panel, a microprocessor, a water detector, a filter tank and a dosing tank; the nozzles are 3 m spaced, the filter mesh is 1 mm in mesh diameter, and the conveying pipe is made of aluminum-plastic composite; by providing remote monitoring, it is possible to implement remote detection and control, there is no need for special arrangement of managers, monitoring and controlling are facilitated, the system is greatly optimized, and the need of people for wastewater treatment is met.

The invention provides a combined suction system for improving the periodicity of a planar cascade and the quality of an outlet flow field. The combined suction system comprises an upper end wall suction cavity, a left turntable, a left turntable slideway, a cascade wind tunnel experiment table, a cascade wind tunnel experiment table fixing seat, a right turntable and a right turntable slideway. In the system, symmetric suction is conducted through the left grid plate and the right grid plate, symmetric suction is conducted through the front boundary layer structure of the left grid plate andthe right grid plate, the suction device arranged on the blade grid is controlled through the throttle valve, and control over the periodicity and the dense flow ratio of a flow field in the blade grid is achieved; according to the requirements of different blade grids. the number and the relative positions of the suction holes formed in the left grid plate and the right grid plate are adjusted, and the control effect of the periodicity and the dense flow ratio of a blade grid outlet flow field is achieved more efficiently in an energy-saving mode.

The invention provides an integrated control method and a system for a monitoring device and a lighting device. The integrated control method comprises the following steps: a main control module is set; a visible light camera module of the monitoring device is controlled to be opened; whether the brightness of the environment is insufficient is judged according to visible light monitoring image information, and if yes, an infrared camera module of the monitoring device is controlled to be opened; whether to exist a behavior to open the lighting device is recognized according to the infrared monitoring image information, if yes, the lighting device is controlled to be opened, the infrared camera module is controlled to be closed, and the visible light camera module is controlled to be opened; and whether to exist a behavior to close the lighting device is recognized according to the visible light monitoring image information acquired by the visible light camera module, if yes, the lighting device is controlled to be closed, the infrared camera module is controlled to be opened, and the visible camera module is controlled to be closed. Integrated control and good matching between themonitoring device and the lighting device can be realized, and effects of achieving energy conservation and enhancing the device performance can be effectively realized.

The invention discloses an intelligent lamp post control system which comprises an intelligent lamp post, a core gateway and an intelligent cloud platform; a camera, an advertisement screen, a charging pile, a meteorological station and other peripherals on the intelligent lamp pole are networked through the core gateway, power management is carried out, and then data transceiving with the intelligent cloud platform is carried out through the core gateway so as to realize remote communication and remote monitoring. In the present invention, according to the intelligent lamp post control system, the embedded core gateway is adopted, all external power supply devices on the intelligent lamp pole can be communicated with the core gateway; the core gateway is enabled to perform integrated management on the power supply so that the control effect of remote independent power-on and power-off of each peripheral device can be realized, all spare parts on the intelligent lamp pole can be integrated, hardware upgrading can be performed from product integration and product performance, the safety of product wiring can also be enhanced and intelligent control of the intelligent lamp pole can be more facilitated.

The invention relates to the field of technologies for controlling photovoltaic solar energy to charge batteries, and in particular relates to a photovoltaic solar charging control device with zero loss and a realization method thereof. The device comprises a solar panel, a diode, a transistor, a battery and two mechanical relays A and B. In the device, two ends of the diode for preventing back discharge are connected with the controlled mechanical relay A in parallel, so that a charge current can flow through a contact of the mechanical relay A directly rather than flowing through the diode in a return circuit when the system works, thus the diode is not subjected to tube voltage drop loss. For the purpose of improving the reliability of the solar charging system, a charging voltage is controlled by parallel combination of the controlled mechanical relay B and the transistor rather than a working control mode of a switching power supply, thus the system can not only capture an opportunity that normal sunlight is utilized to charge the battery but also eliminate reactive loss caused by controlling devices of the transistor in the return circuit, thereby reaching the zero loss control effect.

The invention relates to a vibrating machine MCU (microprogrammed control unit) control device, in particular to a high vibrating-intensity performance vibrating machine MCU (microprogrammed control unit) advance control device and a control method thereof, and belongs to the technical field of vibrating utilizing engineering. A closed-loop control system is formed by an upper computer, a frequency converter, a single-chip computer, an integral charge amplifier, a sensor and vibrating machine. The upper computer is used for interacting information with the single-chip computer, downloading and uploading programs and operating real-time monitoring to the operation of the single-chip computer combing VB (visual basic) program. By utilizing the single-chip computer, a digital-to-analogue conversion extended module on periphery of the single-chip computer and the frequency converter together, digital quantity can be converted into analog quantity which is connected with a frequency converter 0-5 V voltage frequency setting port through the digital-to-analogue conversion extended module to perform frequency converting control to the frequency converter, so that changeable sine wave period outputting setting of frequency curve can be realized, and different rotate speed of the vibrating machine can be further controlled.

The invention provides a device for reducing rotor wing vibration and relates to the field of aviation. The problem that the performance of a mechanism is greatly reduced due to the fact that the drive displacement of existing drivers used for driving a rotor wing trailing edge little wing is small, and the restoring force needs to be provided by a spring is solved. Five piezoelectric stack ceramics are installed between the inner walls of the short edges of a spring steel oval amplification mechanism and are connected through two wedge-shaped pre-tightening blocks. The spring steel oval amplification mechanism is used for amplifying the drive displacement produced by the piezoelectric stack ceramics. The amplification multiple alpha of the spring steel oval amplification mechanism is related to the wall thickness l of the spring steel oval amplification mechanism and the angle theta formed by arc edges. After applying voltage, a piezoelectric driver shrinks to the left side so as to produce the drive displacement, drives a trailing edge little wing connecting rod to move and then drives a trailing edge little wing to deflect around a little wing connection piece. The device is used for reducing rotor wing vibration.

The embodiment of the invention discloses a customer service function access method and a related device. The method comprises the steps that when a target applet needs to be accessed to a customer service session plug-in system to obtain customer service, the customer service session plug-in system can obtain channel parameters sent by the target applet, and the channel parameters are used for identifying configuration information needed by the customer service session plug-in system to be accessed to the target applet. And if the configuration of the target applet is successful according tothe channel parameter, completing the access of the target applet and the customer service session plug-in system, and returning a configuration success message to the target applet. Customer servicesession plug-in system access applets are carried out in a specific mode of channel parameters, customization of requirements of the customer service session plug-in system by the applets is realized,and one customer service session plug-in system can reuse a plurality of applets. Any applet does not need to independently develop a customer service system any more, the customer service session plug-in system can be conveniently accessed through the channel parameters, and applet development and maintenance cost is reduced.

The invention discloses a moulded coal additive, which consists of the following materials with the weight percentage: 0.7 to 1.4 percent of magnesia, 4 to 7 percent of potassium permanganate, 1 to 3 percent of olefin, 2 to 6 percent of potassium chlorate, 2 to 6 percent of potassium nitrate, 2 to 6 percent of sodium nitrate, 3 to 7 percent of manganese dioxide, 0.8 to 2 percent of calcium carbonate, 0.5 to 2 percent of cobalt chloride and the balance of sodium chloride. The adding of the moulded coal additive can lead the moulded coal to be burnt more completely, thereby improving the burning efficiency. The moulded coal additive can lead the sulfur in the moulded coal to participate in burning; while the sulfur which can not be burnt completely can form metallized sulfur and be solidified with soot, deposited with coal slag, and is not discharged with smoke and gas, thus achieving clean burning with non-pollution emission; moreover, all coal boilers do not need to be additionally provided with any attached desulfurizing and dust-removing device and environment-friendly burning can be realized without any limitation.

The invention discloses a traveling losing prevention system, which comprises a tour guide terminal, a tourist terminal and a monitoring platform, wherein the tour guide terminal comprises a first warner, a first display and a first controller, the first warner and the first display are connected with the output end of the first controller, the tourist terminal comprises a second warner, a second display and a second controller, the second warner and the second display are connected with the output end of the second controller, the second controller is provided with an SOS (save our souls) rescue module, the tour guide terminal and the tourist terminal are connected through infrared communication, and the SOS rescue module, the tour guide terminal and the tourist terminal are connected with the monitoring platform through a mobile wireless communication network. The traveling losing prevention system has the advantages that through the infrared communication between the first controller and the second controller, the real-time monitoring and warning on the current state of tourists in scenic spots is realized, and an effect of avoiding the tourist losing is reached; information sent by the SOS rescue module is received through the monitoring platform, and an effect of positioning the geographic positions of the tourists is reached.

The invention discloses a double-circuit control method for a variable air volume air conditioning water chilling unit. The method comprises the following steps that when the variable air volume air conditioning water chilling unit runs, a chilled water output and return temperature difference is set; when the measured value of the temperature difference does not conform to the set value, the set value of refrigerant flow at this moment is calculated; a main controller and an auxiliary controller are arranged in a control circuit, the frequency of a controlled object compressor is controlled through the deviation signal of the refrigerant flow, and finally accurate control over the chilled water temperature difference is achieved. A common PID and a fuzzy self-adaption PID are combined, the corresponding nonlinear problem can be solved, and the control effect can be achieved fast. A controlled object is recognized through a least square method, a fuzzy rule list of a fuzzy self-adaption PID controller is provided, parameters of the controllers are set in a simulation experiment, and the water chilling unit can run stably.

The invention relates to a microgrid voltage type self-synchronizing inversion device and method with a voltage perturbation estimator, and belongs to the technical field of microgrids. According to the device and the method, a microgrid inverter can automatically track the amplitude value, frequency and phase angle of grid voltage during grid connection, and the traditional phase-locked loop is not needed, so that the impact current at the moment of grid connection is avoided, and the regulation time can be shortened. When the inverter accesses the microgrid, the self-synchronization operation of the voltage type inverter is realized, and the control effect of plug and play is realized.

The invention provides an anti-tumor predrug by taking novel amphipathic dendritic macromolecules as carriers based on glycerol as a branching unit and a preparation method thereof. The novel amphipathic dendritic macromolecules that are biodegradable are constructed based on glycerol and glycolic acid oligomer, lactic acid oligomer, glycolic acid and lactic acid alternative oligomer, glycolic acid, lactic acid and amino acid alternative oligomer, and copolymerization oligomer of all as well as polyethylene glycol or polyethylene glycol monomethyl ether; and the novel amphipathic dendritic macromolecules are in bonding reaction with anti-tumor medicines under the existence of a condensing agent, thereby obtaining the predrug of the anti-tumor medicines. The anti-tumor predrug improves the biocompatibility of medicinal carrier materials better, regulates and controls the degradation speed of the medicinal carrier materials in the human body by regulating the polymerization degree and the chemical compositions of oligomer simultaneously, realizes the regulation and control functions to release speed of medicines, has better medicinal slowly-controlled release function and avoids causing toxic and side effects to normal cells due to burst release of anti-tumor medicines.

The invention relates to a coupling three-container liquid level control method based on a port controlled Hamiltonian principle, and belongs to the technical field of electro-hydraulic position servo control. The method comprises the following steps: S1, constructing a three-volume liquid level system model; S2, constructing a PCH model of the three-capacity liquid level system: obtaining a port controlled Hamiltonian model of the three-capacity liquid level control system according to the three-capacity liquid level control system given in the S1; S3, analyzing a three-volume liquid level control principle: S31, determining parameters and avoiding disturbance condition: because all parameters are accurate, obtaining a basic PCH controller based on a PCH method; S32, performing L2-gain disturbance compensation control under the condition that parameters are known; S33, performing adaptive L2 gain disturbance compensation control under the condition that parameters are unknown; and S4, simulating the three-capacity liquid level system. The electro-hydraulic position servo control system can be widely applied to electro-hydraulic position servo control occasions.

The invention provides a synchronous tracking control method of a main mechanical arm and an auxiliary arm based on quantitative communication. The synchronous tracking control method comprises the following steps: S1, the movement modes of the main mechanical arm and the auxiliary mechanical arm are set respectively; S2, the position information and speed information of a main mechanical arm joint and an auxiliary mechanical arm joint are acquired respectively; S3, quantization processing is carried out on the obtained relevant information through a probability quantizer to obtain quantitative information; S4, the quantized information is sent into a controller, and the control moment of the auxiliary mechanical arm is controlled; S5, the controller sends a control instruction to the auxiliary mechanical arm, the corresponding operation is completed from the auxiliary mechanical arm, and a synchronous following control period is completed; and S6, S1 and S5 are repeated, and followingcontrol on the main mechanical arm is completed. According to the synchronous tracking control method, the synchronous tracking control of long-distance and large-number mechanical arms is completedunder the principle of quantitative communication, and unified control and high-precision coordination application of the mechanical arms are effectively realized.

The invention relates to a silicon controlled chopping power regulation driving device, wherein the power frequency signals of a power supply pass through the eighth resistor of an alternating current power supply zero-crossing detection circuit to be input, the signals pass through a first triode and a second triode to generate a positive semicircle standard sawtooth wave and a negative semicircle standard sawtooth wave of which inclined planes are towards the left; the positive semicircle standard sawtooth wave and the negative semicircle standard sawtooth wave pass through the first comparator and second comparator of a voltage-time converter to be converted to a positive semicircle standard sawtooth rectangular wave and a negative semicircle standard sawtooth rectangular wave; the positive and negative semicircle standard sawtooth rectangular waves pass through a differential circuit so that the waveforms of the positive and negative semicircle standard sawtooth rectangular waves are combined; and the third voltage comparator of a waveform shaping circuit is used to perform waveform shaping again, and the shaped waveform drives a silicon controlled rectifier to output choppingsignals. The driving device of the invention realizes the characteristics of low cost, high output efficiency, wide power regulating range, high regulating fineness, easy modularizaion process and the like. The driving device is particularly suitable for the application fields which require power regulating, have simple functions and are sensitive to the cost, such as motor speed regulating and desk lamp brightness regulating.

The invention provides a double-drafting centralized control spinning device and a spinning method. A left middle hollow roller sleeve and a right middle hollow roller sleeve are communicated with a lower middle hollow roller shaft, the surface of the left middle roller sleeve or the surface of the right middle roller sleeve is provided with a first strip-shaped groove, and a front right hollow roller sleeve and a rear left solid roller sleeve or a front right solid roller sleeve and a rear left hollow roller sleeve fixedly sleeve a lower front solid roller shaft; the surface of a right hollowor front left roller sleeve is provided with a second strip-shaped groove, the left side of the lower middle hollow roller shaft is communicated with a negative-pressure draught fan through a negative pressure pipe, and front centralized speed-variable extraction control and rear vortex transfer twisting control are achieved by adopting the first strip-shaped groove for acting on fiber strands before the fiber strands enter the lower middle roller and the fiber strands obtained after output. A hollow air suction insert is arranged in the front left or front right roller sleeve, the left sideor the right side of the air suction insert is communicated with the negative-pressure draught fan through the negative pressure pipe, and negative pressure acts on the fiber strands output by the lower front roller through the second strip-shaped groove to achieve parallel centralized control before the fiber strands are twisted.