31results about How to "Realize linear control" patented technology

The invention discloses an electronic parking system based on air pressure redundancy and belongs to the technical field of intermediate-heavy type truck parking brake systems. The electronic parking system comprises an ECU, an air storage cylinder for parking braking, a parking manual valve, a parking relay valve and a spring braking cylinder. The ECU is electrically connected with an EPB self-reset switch, an HAS self-reset switch, an electronic parking memory valve and a pneumatic and manual alarm switch; the air storage cylinder for parking braking is in air channel connection with an air inlet of the parking manual valve and an air inlet of the parking relay valve; an air inlet of the electronic parking memory valve is connected with the parking manual valve; an air outlet of the electronic parking memory valve is connected with the parking relay valve; and the parking relay valve is in air channel connection with the pneumatic and manual alarm switch and the spring braking cylinder. The electronic parking system is used for air braking system vehicles which adopt springs to store energy to implement parking braking, the comfort and reliability of electronic parking can be provided, under the condition of circuit failure, parking braking and emergency braking can also be air-controlled, and meanwhile the ramp starting auxiliary function can further be achieved.

The invention discloses an electric EGR valve driven by a torsion motor, which comprises a valve body, a valve stem, and a valve plate connected to the lower end of the valve stem. The lower end of the valve body is an air inlet, and the valve stem is connected with a torsion motor through a connecting device; The connecting device includes a connecting bent plate connected to the upper end of the valve stem, an eccentric wheel connected to the rotor of the torsion motor, a torsion spring, and an involute groove is arranged on the eccentric wheel, and the connecting bent plate is connected to the bearing through the connecting rod, and the bearing is arranged on the eccentric wheel In the involute groove, one end of the torsion spring is connected to the stator of the torsion motor, and the other end of the torsion spring is connected to the eccentric wheel; the rotor of the torsion motor is connected with the eccentric wheel through the spring shaft. Install the bearing on the stem in the involute groove of the eccentric. Supply power to the torsion motor, so that the motor rotor and the eccentric wheel rotate after overcoming the turning force of the torsion spring, and the bearing slides in the involute groove of the eccentric wheel to drive the valve stem and valve plate to move downward, that is, to realize the function of opening the EGR valve . When the power supply current of the torsion motor is reduced, the rotation of the rotor and the eccentric wheel can be realized through the tension of the torsion spring, thereby driving the valve stem and the valve core to move upward, that is, the closing function of the EGR valve can be realized.

The invention discloses a throttle valve driven by a direct-current motor. The throttle valve comprises the direct-current motor (2), a motor gear (3), driven gears (4), a transition gear (8), a valve stem (10), a valve block (12), a sensor (9), a valve body (11), a limit piece (16) and a torsional spring (15), wherein the direct-current motor (2) is fixed on the sensor (9) through a motor shell (1), the motor gear (3) is directly mounted on the direct-current motor (2), a chip (17) on the sensor (9) reads the position signals of the valve block (12) through magnetic steel (18) on the transition gear (8), the transition gear (8) is integrated with the valve stem (10) and the valve block (12), and the transition gear (8) rotates to drive the valve block (12) through the valve stem (10), so that the throttle valve can be opened and closed. The throttle valve has the advantages that the direct-current motor can drive by a simple transmission way to open and close the valve block of the throttle valve, and the throttle valve is small in size, easy to mount and arrange, high in control accuracy and short in response time, and the different opening positions of the valve block can be accurately controlled.

The invention discloses an ultrathin vehicle-mounted magnetic suspension flywheel battery for an electric vehicle, and a working method thereof. A motor bracket, an axial magnetic flux motor, a flywheel, an inner stator of a five-degree-of-freedom magnetic bearing, a coil and a permanent magnet are coaxially arranged in a shell from top to bottom, and the flywheel consists of an upper layer, a middle layer and a lower layer which are continuous; an upper annular groove is formed in the middle of the upper annular layer of the upper flywheel, the axial flux motor is placed in the upper annular groove, and an annular inner groove, a middle annular cavity and a lower annular groove are communicated and jointly used for placing the inner stator, the coil and the permanent magnet of the five-degree-of-freedom magnetic bearing; and the five-degree-of-freedom magnetic bearing comprises an axial magnetic bearing, a repulsion magnetic bearing, a torsion magnetic bearing and a radial spherical magnetic bearing from inside to outside. The mode that magnetic bearings with different properties are reused is adopted, advantage complementation is achieved, the bearing capacity and control precision of magnetic bearing supporting can be improved, the stability of a flywheel is remarkably improved, and the problem that the loss of a control coil is large due to complex working conditions can be effectively solved.

The invention provides a voice coil motor for respiratory support equipment, a switch valve and the respiratory support equipment, the voice coil motor comprises a shell, a motor shaft is arranged in the middle of the shell, a flexible elastic part is arranged at the upper part of the motor shaft, and a guide part is arranged at the lower part of the motor shaft and is used for ensuring that the motor shaft does linear motion; and a coil support is arranged outside the guide part, a coil is fixed to the coil support, and a permanent magnet is arranged outside the coil support. The voice coil motor provided by the invention is provided with the flexible elastic piece to provide resistance and support for the motor shaft, and is also provided with the linear bearing, the motor shaft of the voice coil motor is ensured to do linear motion without fluctuation through the combined action of the flexible elastic piece and the linear bearing, and the permanent magnet in the voice coil motor is arranged on the outer side of the coil bracket. Compared with an existing voice coil motor with a permanent magnet on the inner side of a coil, the possibility that the motor shaft is magnetized by the permanent magnet is reduced, and the linear motion stability of the motor shaft is improved.

The invention discloses a paint flow control device. The paint flow control device comprises a paint supply pump and an automatic spray gun, wherein a discharge end of the paint supply pump is connected with an impeller conveyor; one end of the impeller conveyor is connected with the paint supply pump through a pneumatic butterfly valve; the other end of the impeller conveyor is connected with the automatic spray gun through a paint delivery pipe; a flow meter and a precision flow regulator are also arranged on the paint delivery pipe; the precision flow regulator comprises a trace cone valve and an electronic range finder which is arranged on a cone valve adjusting rod. According to the flow control device, high-precision paint flow control is achieved; the paint can be stably output at a micro flow; and meanwhile, linear control on the paint flow under the high-precision micro flow output can be achieved.

The invention provides an energy-gathering pumping device with an air inflow controlling ball valve, and a pumping method. The device comprises an eta-shaped pipeline, a Venturi pipe, negative pressure pipelines, a pumping pipeline and a sealed water storage tank, wherein a water inlet of the eta-shaped pipeline is located upstream, and a water outlet is located downstream; a water inlet end of the Venturi pipe is located below a downflow weir, and an water outlet is located on the downstream liquid surface; the top of the eta-shaped pipeline and the narrowest part of the Venturi pipe communicate with the sealed water storage tank through the negative pressure pipelines provided with negative pressure valves; the side of the sealed water storage tank communicates with an upstream water source through the pumping pipeline provided with a sealed water storage tank valve, the air inflow controlling ball valve and a pumping pipeline valve; a ventilation valve is arranged at the upper partof the sealed water storage tank, and the bottom of the sealed water storage tank is connected to a buoyancy valve and a water faucet. The energy-gathering pumping device has the advantages that energy of the flow drop between the upstream and downstream of the mountain stream can be used to pump water, unattended pumping can be achieved after a siphon is started, and thus, operation is safe, related expenses on administrative staff in a pump station are greatly reduced, and unattended management for a pump station is truly achieved.

The valve element is rotatably installed in the plug valve, a gas inlet channel is formed in the valve element, a first gas outlet channel is formed in the peripheral wall of the valve element, the first gas outlet channel comprises a first through hole and a first groove, the first through hole is communicated with the first through hole, and the first groove is communicated with the first through hole. The first through hole is used for communicating the air inlet channel with the first groove, the first groove extends in the circumferential direction of the valve element and is provided with a first end and a second end in the circumferential direction, the first through hole is located between the first end and the second end, and the groove depth of the first end and / or the second end is gradually increased in the direction facing the first through hole. According to the valve element for the plug valve, the groove depths of the first end part and the second end part of the first groove are gradually increased in the direction towards the first through hole, and the first through hole is located between the first end part and the second end part, so that the fuel gas passing amount of the plug valve can be linearly controlled.

The invention relates to a jade cervical pillow with synergistic and health-care effects, and belongs to the field of health-care devices. The jade cervical pillow comprises a jade pillow body, a magnet therapy part, a heating part, an LED (light emitting diode) light emitting part and a traditional Chinese medicine bag, wherein the jade pillow body comprises a plane part and a jade arch-shaped part; a cavity is formed between the plane part and the jade arch-shaped part; the magnet therapy part, the heating part, the LED light emitting part and the traditional Chinese medicine bag are arranged in the cavity, the heating part is arranged on the inside wall of the arch-shaped part, the magnet therapy part is arranged between the heating part and the inside wall of the arch-shaped part, the LED light emitting part is arranged on the upper surface of the plane part, and the traditional Chinese medicine bag is arranged between the LED light emitting part and the heating part; the heating part is made of carbon fiber heating wires. By adopting the structure, the jade cervical pillow has the advantages that the optical therapy, magnet therapy, jade component health-care, and Chinese herbal medicine health-care effects are realized; in the use process, the health-care effect is better, and the number of health-care items is more.

The invention relates a linear electromagnetic normally-closed valve of an automobile braking system. The linear electromagnetic normally-closed valve of the automobile braking system comprises a plunger tube, a fixed iron piece, a spring, a movable iron component, a flange, a valve seat, a ring filter screen and a steel ball, and the movable iron component is formed by a push rod and a valve body and is capable of axially move inside the plunger tube. The spring is installed inside the fixed iron piece, the fixed iron piece and the movable iron component are connected through the spring, the fixed iron piece and the plunger tube are fixedly connected, the valve seat and the plunger tube are connected together in a welding mode, and the spherical surface tip portion of the push rod and the conical surface of the valve seat are in sealable contacting connection. The linear electromagnetic normally-closed valve of the automobile braking system with the structure can achieve linear control.

The invention provides a control method of rolling torque under a large attack angle and a flight control system. According to the control method, the duty ratio of a jet flow serves as a control quantity to control the rolling moment, under the condition that a constant supply air pressure is guaranteed, the duty ratio of the jet flow is controlled through a high-frequency electromagnetic valve,the speed of the jet flow in an air outlet time period is kept constant, and the speed of the jet flow in an air closing time period is zero, therefore the control effect of a dead zone without a rudder effect is achieved. A jet flow exciter is connected to the flight control system to replace a traditional control surface, the defect that the traditional control surface loses efficacy under the condition of large attack angle flow separation is overcome, and the flight envelope of an aircraft is further widened.

The invention provides an energy-gathering pumping device with an air inflow controlling ball valve, and a pumping method. The device comprises an eta-shaped pipeline, a Venturi pipe, negative pressure pipelines, a pumping pipeline and a sealed water storage tank, wherein a water inlet of the eta-shaped pipeline is located upstream, and a water outlet is located downstream; a water inlet end of the Venturi pipe is located below a downflow weir, and an water outlet is located on the downstream liquid surface; the top of the eta-shaped pipeline and the narrowest part of the Venturi pipe communicate with the sealed water storage tank through the negative pressure pipelines provided with negative pressure valves; the side of the sealed water storage tank communicates with an upstream water source through the pumping pipeline provided with a sealed water storage tank valve, the air inflow controlling ball valve and a pumping pipeline valve; a ventilation valve is arranged at the upper partof the sealed water storage tank, and the bottom of the sealed water storage tank is connected to a buoyancy valve and a water faucet. The energy-gathering pumping device has the advantages that energy of the flow drop between the upstream and downstream of the mountain stream can be used to pump water, unattended pumping can be achieved after a siphon is started, and thus, operation is safe, related expenses on administrative staff in a pump station are greatly reduced, and unattended management for a pump station is truly achieved.

The present invention relates to a method used in the field of hydraulic technology, in particular, it relates to a hydraulic cylinder low-pressure linear output implementation method. Said method is characterized by that it utilizes hydraulic cylinder proportion regulation method, when the hydraulic cylinder is worked, it can simultaneously apply pressure to upper and lower two faces of the piston of hydraulic cylinder, and utilizes the pressure difference of upper and lower two cavities of the hydraulic cylinder to produce working pressure so as to implement low-pressure high-accuracy control of hydraulic cylinder. Besides, said invention also provides the concrete steps for implementing said method.

The invention proposes a control method and a flight control system for the rolling moment at a large attack angle. The control method uses the duty ratio of the jet as the control amount to control the rolling moment. Under the condition that the supply air pressure is kept constant, the duty ratio of the jet is controlled by a high-frequency solenoid valve, which makes the speed of the jet flow Keep constant, and the speed is zero during the air-holding time period, thereby realizing the control effect of no rudder effect dead zone. The invention connects the jet exciter with the flight control system, replaces the traditional rudder surface, overcomes the failure of the traditional rudder surface in the case of flow separation at a large attack angle, and further widens the flight envelope of the aircraft.

The invention discloses an ultra-thin vehicle-mounted magnetic levitation flywheel battery for electric vehicles and a working method thereof. A motor bracket, an axial magnetic flux motor, a flywheel and an inner stator of a five-degree-of-freedom magnetic bearing are coaxially arranged in a casing from top to bottom. , coil and permanent magnet, the flywheel is composed of continuous upper, middle and lower layers. The middle of the upper ring layer of the flywheel on the upper layer is the upper ring groove, and the axial flux motor is placed in the upper ring groove. The groove, the middle annular cavity and the lower annular groove communicate with each other and house the inner stator, coil and permanent magnet of the five-degree-of-freedom magnetic bearing. The five-degree-of-freedom magnetic bearing is axial magnetic bearing, repulsive magnetic bearing, Torsional magnetic bearing and radial spherical magnetic bearing; adopting the mode of multiplexing magnetic bearings of different properties to realize their complementary advantages, which can not only improve the bearing capacity and control accuracy of the magnetic bearing support, significantly improve the stability of the flywheel, but also effectively compensate for the complex The working conditions lead to the problem of large loss of the control coil.

The invention relates to a film type steam generator. The film type steam generator comprises water supply pipelines, a film type evaporation pipe and steam outlet and water return pipelines, wherein the water supply pipelines comprise a main water supply pipeline and a water supply branch pipeline, and supplied water flows to the tail end of the water supply branch pipe from an inlet end of the main water supply pipe; the steam outlet and water return pipelines comprise a main steam outlet and water return pipe and a steam outlet and water return branch pipe; one end of the film type evaporation pipe is connected with the main water supply pipeline or the water supply branch pipeline, and the other end of the film type evaporation pipe is connected with the main steam outlet and water return pipe or the steam outlet and water return branch pipe; steam in the steam outlet and water return branch pipe moves upwards, is output from a high-position steam outlet end and is merged into the main steam outlet and water return pipe, and returned water moves downwards and is merged into the main steam outlet and water return pipe from a low-position water return end; steam in the main steam outlet and water return pipe further moves upwards and is separated from the returned water and finally output from a steam output port, the returned water further moves down and is separated from the steam and finally output from a returned water outlet and merged into a water supply circulation tank, and circular water supply is realized after supplement. The film type steam generator combines advantages of a drum-type boiler and a once-through boiler, overcomes defects of the drum-type boiler and the once-through boiler and has popularization value.

The invention relates to the technical field of transformers, and discloses an intelligent dry-type distribution transformer, which includes a fixed base, fans are arranged inside both sides of the fixed base, and a dry-type transformer group is fixedly installed in the middle of the top of the fixed base , and the top of the dry-type transformer group is fixedly installed with a mounting bracket, and the two sides of the top of the mounting bracket are respectively provided with a control mechanism and a feedback mechanism, and the feedback mechanism includes a fixed sleeve. For the intelligent dry-type distribution transformer, for the setting of elastic airbags, conductive heating bulbs and current wires, when the dry-type transformer is in an overloaded state, the conductive heating bulbs will generate more heat, thereby forcing the elastic airbags to generate heat. Expansion until it ruptures due to excessive expansion, causing the conductive heating ball to fall off due to the loss of the support valve of the fixing cable, and then cut off the circuit connection between the two sets of current wires to realize the tripping action of the dry-type transformer.

The invention discloses a pneumatic proportional valve based on an MEMS microfluidic chip. The pneumatic proportional valve comprises a main valve body; the main valve body is sequentially provided with a membrane cavity, a pressure control cavity and a gas source cavity from top to bottom; a membrane is arranged in the membrane cavity and connected with a valve element moving up and down along with the membrane; a through hole is formed between the gas source cavity and the pressure control cavity; a valve seat driven by the valve element to open and close the through hole is arranged in thegas source cavity; the MEMS microfluidic chip is arranged on the main valve body and provided with a control opening for outputting gas so as to control the membrane to move; and the control opening communicates with the membrane cavity. Specific pressure output of the control opening can be controlled through the MEMS microfluidic chip so as to control the opening degree of the through hole, thusthe pressure of the gas discharged from the main valve body is controlled, and linear proportional control is achieved, so that the pneumatic proportional valve is small in structure, high in reliability, and wide in application range.

The disclosure provides an electrode quality control method and electronic equipment, including: determining the slurry used to prepare the calibration code identification electrode, and determining the square resistance corresponding to the slurry according to the first corresponding relationship obtained in advance; determining the calibration code identification The expected resistance of the electrode, and determine the length of the electrode gap according to the expected resistance, the square resistance and the second corresponding relationship obtained in advance; perform screen printing according to the length of the electrode gap to realize the preparation of the calibration code identification electrode. The functional relationship between the parameters is established through the experimental results, and the electrode gap length is calculated according to the determined resistance of the correction code electrode and the square resistance corresponding to the slurry, so that the production efficiency of the electrode can be effectively improved, and the mass production of the electrode is facilitated.

The invention relates to a method for reducing plating accompanying plates of a VCP electroplating production line. A plating accompanying plate is arranged in front of an electroplated plate at first, the area of the single electroplated plate, the speed of the electroplated plate entering an electroplating cell and the electroplating density are input into a PLC through a keyboard input module,the PLC controls a servo motor to control the electroplated plate to enter the electroplating cell, when the plating accompanying plates in front of the electroplated plate starts entering the electroplating cell, the PLC sends a control command to drive a commutating machine to control the electroplating current of the electroplating cell, and the electroplating current is linearly increased until electroplating starts. By adding the programmable logic controller, the servo motor, the commutating machine, a photoelectric sensor and an encoder to the VCP electroplating production line, whereinthe servo motor, the commutating machine, the photoelectric sensor and the encoder are connected with the PLC, linear control over the electroplating current is achieved, traditional current increasing modes are changed, application of vertical and continuous plating accompanying plates is reduced, and the production cost is reduced.

The invention discloses a dimming glass control device and method and a medium thereof, and aims to solve the problem that a control device commonly used at present cannot well meet the requirements of an EC film for the direct current voltage precision and stability. The device comprises a control unit and a main circuit, the control unit is connected with the main circuit and an upper computer and is used for receiving an electric signal of the EC film returned by the main circuit, sending the electric signal to the upper computer and sending a control signal to the main circuit according to the control information sent by the upper computer so as to control the color change of the EC film; and the main circuit comprises an operational amplifier, a first transistor, a second transistor, a first resistor, a second resistor, a third resistor and a fourth resistor, wherein the first transistor and the second transistor work in an amplification region, so that the whole control process works in a linear region, the linear control is realized, and the precision and the stability of the control voltage are further improved on the basis of original control, and the requirements of EC glass for the high precision and high stability of the direct-current voltage are met.

The invention discloses a linear field weakening control system of an embedded permanent magnet synchronous motor, and belongs to the technical field of motors. The linear field weakening control system comprises the embedded permanent magnet synchronous motor, a linear field weakening controller, an inverter and a rotating speed detection module. The linear field weakening controller is provided with a first linear field weakening control area, a second linear field weakening control area and a third linear field weakening control area. The rotating speed of the embedded permanent magnet synchronous motor is detected through the rotating speed detection module and sent into the linear field weakening controller, the corresponding linear field weakening control area is selected by the linear field weakening controller according to the target rotating speed, the linear field weakening controller controls the inverter to conduct power amplification an output current control signal according to the current control signal output by the corresponding linear field weakening control area, and the embedded permanent magnet synchronous motor is driven to rotate. The linear field weakening control system is simple, high in control speed and high in reliability, constant torque output is achieved when the speed is low, constant power output is achieved when the speed is high, the output torque is large when the speed is low, the speed adjustment range is wide, and the linear field weakening control system has the good application prospects in the fields such as electric vehicles.

The invention discloses a multi-blade type gas flow adjusting and detecting device and belongs to the technical field of ventilation flow control. The device is characterized by comprising a variable-air-volume butterfly valve, the variable-air-volume butterfly valve comprises a valve cylinder with the two ends open, the bottom edge portions of three or more triangular valve blocks are annularly arranged on the inner wall of the valve cylinder in a hinged mode, the middles of the valve blocks are hinged to the front end of a connecting rod, the rear end of the connecting rod is annularly hinged to a rectifier in an array mode, and a guide sliding hole is formed in the rectifier. The rectifier is sleeved on a hard wire pipe through the guide slide hole; the rectifier is connected with the actuator; a plurality of static pressure holes are annularly formed in the leeside of the rectifier, and a plurality of air inlet holes are annularly formed in the windward side of the rectifier; a first flow sensor and a second flow sensor are respectively arranged in the air inlet hole and the static pressure hole; the first flow sensor and the second flow sensor are connected with the controller through wires, and the controller is connected with and drives the actuator to act. Linear control of the ventilation quantity can be realized through scientific structural design and a control method, and the control precision is greatly improved.

The invention provides an electrode quality control method and electronic equipment. The method comprises the steps of: determining slurry used for preparing a correction code recognition electrode, and determining the square resistance corresponding to the slurry according to a first corresponding relation obtained in advance; determining the expected resistance of the correction code recognition electrode, and determining the electrode gap length according to the expected resistance, the square resistance and a pre-obtained second corresponding relation; and carrying out silk-screen printing according to the electrode gap length so as to realize the preparation of the correction code recognition electrode. Function relationships among parameters are established through experimental results; and the electrode gap length is calculated according to the determined resistance of the correction code electrode and the square resistance corresponding to the slurry, so that the production efficiency of the electrode can be effectively improved, and batch production of the electrode is facilitated.