62results about How to "Simple control" patented technology

The invention provides an aerosol generating device, comprising a power supply assembly comprising a power supply; the control assembly comprises a controller and a gate control switch tube; the electric element comprises a first part and a second part, the first part and the second part are both connected with the gating switch tube, and the first part and the second part are configured to provide energy for enabling the aerosol generating product to generate aerosol; the time delay circuit is arranged between the first part and the gate control switch tube, or the time delay circuit is arranged between the second part and the gate control switch tube; wherein the controller is configured to drive the gate control switch tube based on the driving signal, the circuit between the electric element and the power supply is used for conduction, and one of the first part and the second part generates energy before the other one.

The invention discloses a telescopic structure robot system based on an ROS. The telescopic structure robot system comprises a movable chassis, a vertical elevator installed above the movable chassis, a telescopic arm and a clamping jaw. The telescopic structure robot system is designed based on ROS2, and the telescopic structure robot system comprises a visual recognition control module. The main controller is an STM32, and the main controller adopts an OpenCTR B20 control panel of the Tuck innovation technology. Compared with a traditional complex and expensive robot system, the robot with the telescopic structure has a simpler structure and a simpler control mode, so that the robot with the telescopic structure is easier to develop and lower in cost; an ROS is combined with an STM32 single-chip microcomputer for control, movement in any direction and grabbing in an effective range can be achieved, and the requirement for grabbing objects in various daily scenes can be easily met; meanwhile, articles can be automatically grabbed in combination with computer vision; the requirements of application scenes such as home, medical treatment and business are met, and popularization and marketization are easier.

The invention discloses a temperature control valve. The temperature control valve comprises a valve body, a valve element assembly and a temperature sensing assembly. A conveying space and a temperature sensing space are defined by the valve body, a liquid inlet, a first liquid outlet and a second liquid outlet are formed in the peripheral wall of the valve body in the conveying space, the temperature sensing space is communicated with the liquid inlet, and the valve element assembly is movably installed in the conveying space; the temperature sensing assembly comprises a reversing piece and a temperature sensing piece, the reversing piece is movably arranged in the temperature sensing space, the temperature sensing piece is arranged in the temperature sensing space, and the reversing piece is in transmission connection with the temperature sensing piece and the valve element assembly; when the temperature of the fluid is lower than the preset temperature, the fluid drives the reversing part to drive the valve element assembly to communicate with the liquid inlet and the first liquid outlet and block the liquid inlet and the second liquid outlet. And when the fluid temperature is not lower than the preset temperature, the temperature sensing piece drives the reversing piece to drive the valve element assembly to communicate the liquid inlet with the second liquid outlet, and the liquid inlet and the first liquid outlet are blocked. The flow direction of the fluid does not need to be controlled through a temperature sensor and an electric control program, and the control mode of the flow direction of the fluid can be simplified.

The invention discloses a multi-degree-of-freedom piezoelectric motor stator structure, a piezoelectric motor and a driving method, and different voltage signals are applied to piezoelectric patches around a stator to excite first-order extension and multi-order bending modal motion, so that a driving foot of the stator generates elliptical motion, and further a mover is pushed to move. Based on the two-degree-of-freedom piezoelectric stator, the two-degree-of-freedom piezoelectric stator is suitable for plane multi-degree-of-freedom driving and rotation multi-degree-of-freedom driving, and the applicable range of the piezoelectric stator is greatly widened; and the two driving modes are simple in structure assembly design, and are suitable for a microminiature multi-degree-of-freedom precision driving system. As the motor can meet the driving requirements of planar and rotary driving occasions, the assembly design requirements of the motor are greatly reduced, and decoupling movement in different directions can be realized; according to the multi-degree-of-freedom driving mode based on the two-degree-of-freedom piezoelectric stator, the design flexibility is high, and the performance of the motor is effectively improved.

The invention provides a humanoid robot complex terrain balance control method based on a state and disturbance observer, and belongs to the technical field of robot application. The problem that the humanoid robot is unstable when walking in a complex environment is solved. According to the technical scheme, the method comprises the following steps that 1, a simplified humanoid robot'spring-damping 'inverted pendulum model is established; 2, designing a state and disturbance observer; step 3, based on the step 2, designing a state feedback controller taking a real-time observation object of the state and disturbance observer as input; 4, selecting an appropriate controller pole and an appropriate controller observation point; and 5, simulation verification of attitude balance control of the humanoid robot under the complex terrain is carried out. The method has the beneficial effects that the robustness of the robot to interference and the task execution capability can be improved particularly in disaster rescue and complex environment operation.

The invention discloses a rotating speed control system for a fuel pump motor. The rotating speed control system comprises the fuel pump motor and a driving module, the fuel pump motor controller is used for acquiring a target rotating speed of the fuel pump motor body and outputting a driving pulse signal to the driving module according to the target rotating speed; the driving module is used for converting the driving pulse signal into a driving voltage signal when the driving pulse signal is at a high level, and sending the driving voltage signal to the fuel pump motor body, so that the fuel pump motor body works; the fuel pump motor controller is further used for receiving the rotating speed of the fuel pump motor body when the fuel pump motor body works and adjusting the duty ratio of the driving pulse signal sent to the driving module according to the rotating speed and the target rotating speed when the rotating speed is out of the preset motor rotating speed range of the target rotating speed. The rotating speed of the fuel pump motor body is within the preset motor rotating speed range of the target rotating speed. By means of the system, accurate control over the rotating speed of the fuel pump motor body is achieved.

The invention discloses a rapid pressure reduction system which comprises a blasting laboratory, a butterfly valve, a second blasting device, a negative pressure storage tank, an adjusting device used for adjusting the size of a blasting channel, a first blasting device and a vacuum equipment box used for vacuumizing the negative pressure storage tank. Two pipelines are connected between the blasting laboratory and the negative pressure storage tank, one pipeline is a short pipeline, and the other pipeline is a long pipeline; the butterfly valve and the second blasting device are installed on the short pipeline, and the butterfly valve is located between the blasting laboratory and the second blasting device. The adjusting device and the first blasting device are installed on the long pipeline, and the first blasting device is located between the blasting laboratory and the adjusting device. The device is simple, practical, small in occupied space and convenient to combine and use; the rapid blasting experiment and the top-speed blasting experiment of small animals and small products are met, and the control mode is simple, stable and reliable; the cost of experimental equipment is reduced; the device is high in practicability, safe to use and particularly suitable for popularization and application.

This utility model relates to an intelligent water temperature control module, characterized by comprising a flow regulation module, a pressure balancing module, and a temperature control module. The flow regulation module includes a first valve seat and a flow regulating valve core. The first valve seat has a first cold water inlet channel, a first hot water inlet channel, a flow regulating valve core mounting cavity, a first cold water outlet channel, and a first hot water outlet channel. The pressure balancing module includes a second valve seat and a balancing valve core. The second valve seat has a second cold water inlet channel, a second hot water inlet channel, a balancing valve core mounting cavity, a second cold water outlet channel, and a second hot water outlet channel. The temperature control module includes a third valve seat and a temperature control valve core. The third valve seat has a third cold water inlet channel, a third hot water inlet channel, a temperature control valve core mounting cavity, a mixing chamber, and a mixed water outlet channel. Each module exists independently and is independently controlled, simplifying the control method, reducing control and manufacturing difficulty, improving the control accuracy of water flow and temperature, and allowing for selection and combination of different modules.

The application provides an integrated aircraft refueling lamp, and belongs to the technical field of illumination design of an aircraft in-flight refueling system, and specifically comprises a shell assembly, a light source assembly, a driving assembly and a light source regulator, the shell assembly comprises a shell and first and second cavities arranged in the shell, the light source assembly is arranged in the first cavity, the driving assembly and the light source regulator are arranged in the second cavity, the light source assembly, the driving assembly and the light source regulator are sequentially connected, the light source assembly is provided with a refueling probe illumination mode and a conical sleeve floodlight illumination mode, the driving assembly is used for dividing voltage and controlling constant current, and the light source assembly is used for stabilizing input voltage when light intensity is changed. Through the processing scheme, the airborne equipment has the advantages of light weight, integration, low cost and simple control.

The invention discloses a pressure control well cementation system and method. The system comprises an automatic throttling unit, an automatic slurry supplementing and pressurizing unit and a control center. Wherein the automatic throttling unit is used for being arranged between a well mouth and a mud tank so as to control the back pressure of the well mouth by adjusting the valve opening degree of the throttling valve; the automatic slurry supplementing and pressurizing unit is used for being communicated with a connecting pipeline between a well mouth and the automatic throttling unit so as to control well mouth back pressure by compensating fluid flow for the system. The control center is used for controlling the automatic throttling unit to adjust the valve opening degree of the throttling valve and / or controlling the automatic slurry supplementing and pressurizing unit to adjust the output fluid flow so as to control the back pressure of the wellhead based on the target fluid parameters of the wellhead and the parameter deviation of the corresponding actually-measured fluid parameters. The fluid parameters comprise pressure or fluid flow, and the actually-measured fluid parameters comprise actually-measured pressure of one end, close to the wellhead, of a throttling valve of the automatic throttling unit or actually-measured fluid flow of the output end of the automatic throttling unit. And pressure control in the whole well cementation process can be achieved.

The present invention provides an air conditioner and an air guide plate thereof. The air guide plate is used to be installed at the air inlet or air outlet of the housing of the air conditioner, and the air guide plate defines a purification chamber for accommodating purification substances, and the purification chamber is connected to the external environment through the air inlet and the air outlet. The air guide plate is configured to allow the airflow to enter the purification chamber through the air inlet when it is at a purification angle that makes the air inlet face the air inlet or the air outlet, and then flow out through the air outlet after being purified by the purification substances. The air guide plate of the present invention has a simple and novel structure and has a purification function, and the conception is very ingenious.

The invention provides a telescopic underwater coral planting robot. The problems that in the prior art, a coral planting robot is poor in environmental adaptability, large in advancing resistance and the like can be solved. The underwater coral planting robot comprises a shell, a visual camera, a drilling mechanical arm, a grabbing mechanical arm, a telescopic operation table, a propeller, a cabin door, a seedling storage cabin and a control cabin, the head of the housing is provided with a visual camera and the tail is provided with a propeller. Cabin doors capable of being opened and closed are arranged on the two sides of the lower surface of the shell correspondingly, and a drilling mechanical arm and a grabbing mechanical arm which can stretch out of and retract into the shell are installed in the two cabin doors correspondingly; a telescopic operation table is arranged in the middle of the lower surface of the shell and used for receiving the coral seedlings conveyed by the seedling storage cabin and conveying the coral seedlings to a set grabbing position, and the coral seedlings can be grabbed by a grabbing mechanical arm conveniently; the seedling storage cabin and the control cabin are arranged in the shell; the seedling storage cabin is used for storing coral seedlings and can convey the coral seedlings to the telescopic operation table.

The invention relates to a waste heat recovery system and method for combined operation of a computing power center and a thermal power plant, a heat pump unit is arranged between the computing power center of the thermal power plant and a low-pressure heating system, the computing power center is provided with a water cooling circulation device, and the high-temperature water output end of the water cooling circulation device is communicated with the waste heat absorption end of the heat pump unit through a heat preservation pipe; the low-temperature output end of the heat pump unit is communicated with the low-temperature water filling end of the water-cooling circulating device through a cooling water pipe, the recovery pipeline is communicated with the low-temperature heating end of the heat pump unit through a branch recovery pipeline, and the high-temperature output end of the heat pump unit is communicated with the liquid inlet end of the low-pressure heater system through a waste heat utilization pipeline; the water-cooling circulating device arranged in the computing power center is used for recycling heat during operation of each computing unit, and a closed circulating system is formed, so that waste heat output can be efficiently recycled while the computing power center is cooled.

This invention provides an air guiding device, an air conditioner, and a control method. The ventilation equipment has an air outlet. The air guiding device includes a rotating shaft and air guiding components. The rotating shaft is rotatably mounted at the air outlet. Multiple air guiding components are arranged alternately along the circumference of the rotating shaft. When the rotating shaft rotates, the multiple air guiding components can rotate synchronously. By controlling the rotating shaft to rotate to different angles, the air outlet can achieve simultaneous upward and downward airflow, upward airflow alone, and downward airflow alone. The airflow volume of the air outlet can be adjusted by adjusting the rotation angle of the rotating shaft. The structure and control method are simple, occupy little space, and have stable movement. The two sides of the first air guiding component in the thickness direction are both airfoil-like structures, and the connection between the air guiding component and the rotating shaft is smoothly transitioned to reduce air resistance. The target rotation angle of the rotating shaft is determined according to the current position and target position of the air guiding component. By controlling the rotating shaft to rotate to the target rotation angle, the air outlet can be in the target state.

The invention provides a winding multi-sector adjustable limited angle torque motor, and belongs to the technical field of motors, the winding multi-sector adjustable limited angle torque motor comprises a rotor assembly, a stator assembly and a power supply assembly, the stator assembly is arranged on the outer side of the rotor assembly, the power supply assembly is connected with the stator assembly, and the rotor assembly comprises a rotor core, a U-shaped built-in permanent magnet and a rotating shaft. The rotor core is arranged on the outer side of the rotating shaft, the U-shaped built-in permanent magnet is embedded in the rotor core, the stator assembly comprises a stator core and a multi-sector parallel annular stator winding, and the stator core sleeves the outer side of the rotor core. The winding adopts a multi-sector parallel connection mode, and other sectors can still work normally under the condition that part of sectors have faults, so that the motor has certain fault tolerance capability.

The invention discloses a light emitting router based on a multi-wavelength laser and a selectable light beam splitter. A multi-wavelength laser is used as a light source, and emitted light signals are output after being selected by a selectable light beam splitter; wherein the multi-wavelength laser realizes simultaneous output of a plurality of wavelengths capable of loading modulation signals for each wavelength, and the light beam splitter can be selected to split light beams and output the light beams from different ports; the multi-wavelength laser constructed based on the multi-channel semiconductor optical amplifier array structure is combined with the selectable beam splitter, so that signals of multiple wavelengths can be selectively output from different ports. The optical transmitter-router can be applied to each node in a distributed routing network, is used as an optical transmitter-router, and has the advantages of compact structure, large bandwidth of a single link, high switching speed and the like.

The present invention discloses a pressure control device based on a combined solenoid valve, comprising a valve body, a solenoid valve assembly arranged in the valve body, and a relay valve assembly; the upper end of the relay valve assembly is provided with an upper chamber of the relay valve piston, and the solenoid valve assembly is used to control the change of the air pressure in the upper chamber of the relay valve piston; wherein the solenoid valve assembly comprises a standby pressure boosting solenoid valve and a pressure maintaining and reducing solenoid valve; the pressure maintaining and reducing solenoid valve has two moving iron cores, and by passing different voltages through the coils shared by the two moving iron cores, the secondary control of the pressure maintaining and reducing solenoid valve is realized. The pressure control device has a very compact structure, occupies a small space, has a low cost, a fast response speed, and a high control accuracy.

The utility model discloses an automatic closing ice outlet device based on gravity effect and ice maker thereof, including shell, ice storage basket and spiral ice outlet mechanism, install ice storage basket in the shell, the ice storage basket upper side outer edge is provided with the ice outlet that downward extension is used for the ice block automatic sliding of ice block along the side surface on the shell to the corresponding, spiral ice outlet mechanism is set up in the shape of inclination, to push out the ice block that the ice storage basket cavity stores from the ice outlet through the rotation spiral axle, the ice outlet upper side is hanged with the ice outlet door that both ends rotate and articulate in the ice outlet both sides, and the whole side surface export is automatically sealed with the ice outlet door with the gravity, the ice block that spiral ice outlet mechanism pushes out along the axial direction of spiral axle pushes the ice outlet door, and the articulated pivot is the pivot center with the upper side and turns over and opens the ice outlet conveniently, and the ice block automatically slides and falls along the side surface, realize the automatic closing ice outlet, simplify the ice control structure.

The present invention relates to the technical field of segment beam lifting and handling equipment, and specifically refers to a hoisting device, a hoisting system and a hoisting method suitable for hoisting tower column segments. The suspension beam is fixedly connected to the tower movable pulley block; the upper ends of four groups of hydraulic adjustment structures are respectively fixed to the four corners of the suspension beam; the slewing support beam is connected to the lower ends of the four groups of hydraulic adjustment structures; the slewing structure is installed on the slewing support beam; the middle position of the main beam is connected to the slewing structure; two groups of distribution beams are respectively placed at both ends of the main beam; the first translation structure is arranged between the main beam and the distribution beam; the rotating structure is arranged between the main beam and the distribution beam; four rotary lock rods are respectively placed at both ends of the two groups of distribution beams; the second translation structure is arranged between the rotary lock rod and the distribution beam; the rotary lock structure is arranged on the distribution beam. The hoist of the present invention can meet the various lifting point changes during the hoisting of the tower column segment, can meet various needs, is simple to operate, and has high operating efficiency.

The utility model discloses a pressure reducing and speed reducing buffer loop of an oil cylinder, which comprises a first electromagnetic directional valve, a pressure reducing valve, a first overflow valve, a two-way cartridge valve, a throttle valve and a second electromagnetic directional valve, the first electromagnetic directional valve is connected with the pressure reducing valve, the pressure reducing valve is connected with the first overflow valve, the two-way cartridge valve is connected with the second electromagnetic directional valve, and the throttle valve is connected with the second electromagnetic directional valve. The throttle valve is connected with the two-way cartridge valve, the two-way cartridge valve is communicated with a rodless cavity of the oil cylinder, and the throttle valve is communicated with the rodless cavity of the oil cylinder. On the premise that a proportional reversing valve is not used, the stretching speed of the oil cylinder is regulated and controlled, the cost is low, the control mode is simpler, and pressure reduction and speed reduction of the oil cylinder can be achieved.

This utility model relates to the technical field of air dehumidification systems, specifically disclosing a low-energy, precision-controlled low-temperature dehumidifier system. The system includes a dehumidification channel, heat pipes, an evaporator, a condenser, a compressor, an expansion valve, a heat exchanger, a low-temperature storage tank, a first pump body, a first valve body, a second pump body, and a second valve body. The heat pipes include a heat-absorbing section and a heat-releasing section. The heat-absorbing section, evaporator, heat-releasing section, and condenser are sequentially arranged within the dehumidification channel along the gas flow direction. The heat exchanger has a first heat exchange channel and a second heat exchange channel that can exchange heat with each other. One end of the first heat exchange channel, the compressor, the condenser, the expansion valve, and the other end of the first heat exchange channel are sequentially connected. One end of the second heat exchange channel, the low-temperature storage tank, the first valve body, the first pump body, and the other end of the second heat exchange channel are sequentially connected. The evaporator, the low-temperature storage tank, the second valve body, and the second pump body are sequentially connected. This utility model simplifies the control method of evaporator refrigeration and reduces manufacturing costs.

This utility model belongs to the technical field of mixed gas-liquid fluid equipment in the medical instrument industry and industrial automation industry, and provides an automatic drainer, including an upper valve body, a lower valve body, an elastic reset component, and a valve core component. Compared with traditional electronic timed discharge devices or discharge devices composed of liquid level sensors, this application has a reasonable structural design, reduces electronic sensors, has a small overall size, automatically detects liquid level and automatically discharges, and achieves the function of discharging liquid without venting air. At the same time, the control method is simple, does not require circuit control wiring, and the product is safer to use, has a longer lifespan, and lower operating costs.

The utility model discloses a kind of soil loosening rotary tiller mechanism of rudder control, and the free end of transmission assembly is provided with power input shaft, and the free end of the both sides of power input shaft is connected suspension frame respectively, and two suspension frames are commonly driven to cross over knife shaft, and a plurality of rotary tiller mounting seat are processed on knife shaft, and each rotary tiller mounting seat is adapted with rotary tiller, and rotary tiller is processed into L type or S type bending, and transmission assembly side is provided with rudder module, and rudder module adjusts transmission assembly angle change;The utility model adjusts dynamic angle to transmission assembly by rudder module, realizes the control of rotary tiller soil angle, and control mode is more convenient, and effectively cope with different soil working condition;Two kinds of special rotary tiller of L type and S type are used, and respectively aiming at hardening soil crushing and root stubble anti-winding working condition, solve the problem of traditional blade uneven ploughing, easy to bounce, easy to entangle;Overall structure is reasonable, transmission is reliable, significantly improve operation quality and adaptability.

The application relates to the technical field of control of an excitation dual-power automatic transfer switch, and discloses a novel excitation dual-power circuit automatic transfer control system, which comprises a system module assembly, the system module assembly comprises an intermediate relay module and a switch module, the intermediate relay module comprises KA1, KA2, KA3, KA4 and KA5, the switch module comprises a one-way travel switch, a two-way travel switch, a guide travel switch and a brake travel switch, the one-way travel switch is COM1NC1, the two-way travel switch is COM2NC2, the guide travel switch is COM3NC3, the brake travel switch is COM4NO4 and COM4NC4, and the system module assembly comprises an input module, a coil module and an electrical lock SB. The intermediate relay is adopted to control the logic relation of the circuit, the control mode is simple, the failure rate is low, and the production cost is saved.

The application relates to a star ceiling control method, a star ceiling control device, a star ceiling control equipment and a storage medium, and belongs to the star ceiling field, wherein the star ceiling control method comprises the following steps: in response to a control instruction, the control instruction is analyzed, and a lamp effect configuration is updated; and a lamp effect is generated according to the analyzed instruction and is executed. The star ceiling control method of the application realizes wireless and intelligent lamp effect regulation and control of the star ceiling through Bluetooth (BLE) and light voice control, has special effects such as constellations and meteors, supports flexible adaptation of 256 / 512 lamp beads, and realizes binding of special effects and custom instructions.

The application discloses a screw rod part assembly section lead error detection structure and a detection method, the detection structure comprises an assembly plate, a screw rod, a wire rail, an extension structure mounting plate, a connecting plate, a plurality of elastic extension test structures, a pressure sensor and an eddy current sensor, the wire rail, the screw rod and the extension structure mounting plate are arranged in parallel on the assembly plate, the connecting plate is fixedly connected with a screw nut seat and is slidingly arranged on the wire rail, each elastic extension test structure comprises an extension block and a metal test piece, the extension block is slidingly arranged on the extension structure mounting plate, the metal test piece is arranged on the extension block, the pressure sensor is mounted on the connecting plate, and the eddy current sensor is mounted on the connecting plate and is arranged opposite to the metal test piece. The application can realize screw pitch error detection and lead error calculation of a machine tool in a part assembly stage, improve subsequent assembly process of the screw rod in the part assembly stage, improve assembly precision and assembly efficiency of the screw rod, and avoid the problem that it is difficult to adjust error out-of-tolerance found after whole machine assembly.

This invention provides a front-end treatment device for electroplating wastewater contaminated with heavy metals, relating to the field of electroplating wastewater technology. The device includes a first treatment chamber, a transmission chamber, a mounting rod, a permanent magnet, a connecting rod, a second treatment chamber, a connecting pipe, and a stirring assembly. This invention uses neodymium iron boron (NdFeB) permanent magnets as the core element for heavy metal adsorption. These magnets possess extremely strong magnetic adsorption properties, rapidly adsorbing magnetic heavy metal ions such as iron, nickel, and cobalt, as well as pollutants containing magnetic components, from electroplating wastewater. Simultaneously, the permanent magnets are driven by a swing assembly to oscillate reciprocally at an angle of 30–60°. Combined with the opposite polarity of adjacent permanent magnets, a dynamically changing magnetic field environment is formed. This not only expands the magnetic field coverage but also avoids the formation of adsorption saturation regions, significantly improving the capture efficiency of heavy metal ions. The titanium alloy or polyvinyl chloride corrosion-resistant protective shell on the outer surface of the permanent magnets ensures magnetic stability and extends service life, guaranteeing long-term and efficient heavy metal separation.

The utility model relates to the technical field of marine ranches, and discloses an automatic netting covering system which comprises a net cage frame and further comprises a covering module, the covering module is composed of a covering assembly and a control rope, and the control rope is divided into a covering part, a rotating part, a covering connecting part and a rotating connecting part through a direction adjusting roller set. The sealing cover connecting part and the rotary connecting part are independently dragged through a winding module A and a winding module B. The top face of the net cage frame is fixedly connected with two end frames, and the sealing cover part penetrates through hole bodies in the side faces of the end frames and is in sliding connection with the end frames. By means of the mode that the lifting tractor drives the net cage frame to descend, by means of the distance change between the net cage frame and the rolling module, the net cage frame drives the cover net to move according to the control track to achieve closing, the movement track of the net cage frame and the movement track of the cover net are coupled, and the control mode is simplified; and the problem of traction fracture caused by insufficient control precision due to speed difference adjustment is avoided.

The application discloses a genetically engineered bacterium capable of regulating the content of lactic acid component in polyhydroxyalkanoate, characterized in that the genetically engineered bacterium is a gene pct controlled by an m2 promoter cp The gene is integrated into the genome of the E. coli, and a recombinant strain WJ01 is constructed; then, the recombinant strain WJ01 is used as a starting strain, a pTrc99aABC plasmid and a pBAD-PTrc-lepgt plasmid are introduced into the recombinant strain WJ01 by calcium transformation to obtain a production strain. The application further discloses a construction method of the genetically engineered bacterium and application of the genetically engineered bacterium. The genetically engineered bacterium obtained by the method has little influence on cell growth, and polyhydroxyalkanoate with different contents of lactic acid component can be obtained.

The invention discloses a topological circuit of an electromagnetic type continuous reactive power compensation and harmonic suppression system (EVC-PPF), which is composed of an electromagnetic type reactive power compensator (EVC) and a passive power filter (PPF), and the topological circuit is mainly composed of a single tuned filter, a second-order high-pass filter, a rotation phase-shifting transformer and a three-phase capacitor, and is characterized in that the single tuned filter, the second-order high-pass filter, the rotation phase-shifting transformer and the three-phase capacitor are connected in series, and the single tuned filter, the second-order high-pass filter, the rotation phase-shifting transformer and the three-phase capacitor are connected in series. The filter forms a low-resistance channel to realize a filtering function by using resonance characteristics, and can compensate reactive power for a system; the electromagnetic reactive power compensator uses the electromagnetic induction principle and the vector synthesis principle to control the voltage at the two ends of the capacitor so as to realize bidirectional continuous reactive power compensation. The system has the advantages of being reliable and easy to maintain, simple to control, good in economical efficiency, capable of achieving large capacity, free of harmonic wave introduction, free of excessive inductance and the like, and can solve the electric energy quality problem caused by the fact that a large amount of distributed new energy is merged into a power grid.