667results about How to "Precise pressure control" patented technology

The invention relates to a self-controlled efficient and electrostatic-spraying pesticide application machine for greenhouses, and the machine provided by the invention comprises a spraying dolly, a pesticide supply system, a pressure fluctuation elimination system, an HMI-PLC (human-machine interface-programmable logic controller) human-machine interactive automatic logic control system, a rotating electrostatic spray system, a high-definition mistform vedio monitoring system, a machine frame and a power supply system, wherein the pesticide supply system, the pressure fluctuation elimination system, the HMI-PLC man-machine interactive automatic logic control system, the rotating electrostatic spray system and the power supply system are arranged in a spraying dolly shell (42); the high-definition mistform vedio monitoring system is arranged at the top of the spraying dolly; and the HMI-PLC man-machine interactive automatic logic control system is connected between the pesticide supply system and the rotating electrostatic spray system by virtue of a pipeline. By using the machine provided by the invention, on the premise of ensuring the pest control effect, the utilization rate of pesticides is improved, the pest control cost is reduced, the environmental pollution is reduced, the production efficiency and the social efficiency are improved simultaneously, and the labor intensity is reduced.

The invention relates to a pedal decoupling type electro-hydraulic composite braking system for integrated pedal displacement measurement. The pedal decoupling type electro-hydraulic composite braking system for the integrated pedal displacement measurement comprises a hydraulic braking subsystem and a motor regenerative braking subsystem, wherein an integrated type braking master cylinder assembly of the hydraulic braking subsystem is composed of an integrated type braking master cylinder and a high-pressure oil source. The integrated type braking master cylinder integrates a braking master cylinder pressure generation function, a pedal feeling imitation function and a positive and passive hydraulic assistance function. A high-pressure oil outlet of the high-pressure oil source is connected with the integrated type braking master cylinder, and provides stable and continuous braking energy for the braking process. A pressure sensor is installed on the integrated type braking master cylinder to achieve measurement of displacement of a braking pedal, and decoupling of the braking pedal is achieved. The pedal decoupling type electro-hydraulic composite braking system for the integrated pedal displacement measurement is compact in structure, easy to implement and high in integration degree, improves feeling of the braking pedal of a vehicle, has a positive hydraulic assistance function in a normal braking condition, has a passive hydraulic assistance function in an ineffective condition, effectively ensures braking safety of the vehicle, can be applied to a traditional vehicle line control braking system, and can be widely applicable to all-electric cars, hybrid electric cars and fuel cell cars.

The invention discloses a servo double-surface heating vacuum packaging machine and belongs to liquid extraction seal secondary forming and packaging equipment of flexible packaged lithium batteries. The servo double-surface heating vacuum packaging machine comprises a double-station turntable feeding device driven by a cam partitioning device, a packaging mechanism with an up-and-down packaging device, and an electric control system, wherein the up-and-down packaging device comprises an upper cavity main body and a lower cavity main body; the opening directions of the upper cavity main body and the lower cavity main body are opposite to each other; the upper cavity main body and the lower cavity main body can clamp the turntable to form a sealed cavity body; a pressing board, an upper sealing head and a bayonet are arranged in the upper cavity main body; a lower sealing head and an aspirating hole are arranged in the lower cavity main body; the aspirating hole is communicated with an external vacuum source; the upper sealing head corresponds to the lower sealing head; and a heating body is arranged inside the servo double-surface heating vacuum packaging machine. The servo double-surface heating vacuum packaging machine has a compact structure and high efficiency; the electric core packaging quality is stable and the cost is low; vacuum liquid extraction can be realized; and pollution of the electrolyte to the equipment can be reduced to minimum.

A precise dual-surface polishing machine is composed of machine frame, mainshaft and its drive mechanism, upper polishing disc and its drive unit, lower polishing disc, internal and external toothed rings, planetary gear for holding workpiece, 4 coaxial frequency-conversion motors fro respectively driving coaxial upper and lower polishing discs and external and internal toothed rings, pressure regulating sensors, and pressure regulating valves.

The invention provides an instrument indicator pressing system based on machine vision recognition and relates to the field of an instrument indicator mounting technology. The instrument indicator pressing system comprises a main control system; the main control system is in control connection with an operation part, a machine vision recognition module, a movement controller, a display system and a printing system; the pressing system further comprises a power supplying system for providing a power supply for each part; the movement controller is in control connection with a servo driver; the servo driver drives a servo motor; and the servo motor drives an executing part which is mounted on a three-dimensional coordinate movement device and can do three-dimensional movement on the three-dimensional coordinate movement device. According to the instrument indicator pressing system disclosed by the invention, indicator pressing and correction movement can be carried out through the three-dimensional coordinate movement device; a three-dimensional movement system can control a plurality of indicator pressing heads to take a piece to carry out indicator pressing at the same time; and meanwhile, depth and pressure values of pressing the indicator are designed according to requirements and the accurate control on the depth and pressure values of pressing the indicator can be realized, so that the working efficiency and the accuracy of pressing the indicator are greatly improved.

The invention discloses a high-precision electric field driven spray deposition 3D printer and a working method thereof, and solves the problems of a traditional 3D printer on multiple aspects of resolution, stability and controllability; high-precision printing of multilayer structures can be realized; the printing process is observed and monitored in real time; and high-precision pattern printing is performed on insulation substrates through electric conducting materials. The high-precision electric field driven spray deposition 3D printer comprises a mounting baseplate; a Y-axle worktable is arranged on the mounting baseplate; a vacuum absorption platform is fixed on the Y-axle worktable; a printing substrate is absorbed on the vacuum absorption platform; a printing nozzle and a vertical observation camera are correspondingly arranged above the printing substrate, and are connected to a Z-axle worktable; the Z-axle worktable is fixed on an X-axle worktable; a squint observation camera is correspondingly arranged on one side of the printing nozzle; an LED light source and a far infrared curing light source are correspondingly arranged on the other side of the printing nozzle; theprinting nozzle communicates with a storage bottle; and the storage bottle is arranged on a lifting table.

The invention provides a radial numerical control riveting device used in a wheel hub unit. The device comprises a main body frame, a rivet head and an electric pushing cylinder. A bedplate is arranged on the main body frame, and the electric pushing cylinder is arranged under the bedplate; the upper end of a push rod of the electric pushing cylinder is connected with a movable plate, and a pressure sensor and a displacement sensor are arranged in the electric pushing cylinder; the movable plate is provided with a tooling position rectifying device and an automatic tooling identifying device; the rivet head is arranged above the bedplate, and a torque sensor is arranged at one side of the rivet head; the upper end of the torque sensor is connected with a servomotor, and the lower end thereof is connected with a connecting shaft; the connecting shaft is connected with a connecting disk at the lower end of the rivet head. By riveting from bottom to top, the rivet head is arranged above the tooling, and riveting pressure and displacement are generated below the tooling; the electric pushing cylinder is taken as the power source of the riveting pressure and the displacement, and the riveting device has simple structure; the riveting pressure and the displacement are controlled by the sensor, thus realizing accurate control of the riveting pressure and the displacement and assuring the riveting quality.

A polishing method of wafers mainly contains the following steps: (1) put the wafers for processing on the planet gear of the polisher. (2) Startup the polisher and it can set technology parameters based on the wafers after self-checking. (3) Control the cylinder connecting with the upper polishing plate to descend and receive the signal from the position sensor. When the upper polishing plate arrive the working position, the cylinder stops and connects it with the long axis. (4) If the delivery device of polishing liquid is normal, open the polishing liquid. (5) Control the cylinder to drop continuously and test the pressure between the cylinder and the upper polishing plate by a pressure sensor. Start all conversion motors when the pressure reaches the desired value. (6) Polish the wafers by controlling the conversion motors and the cylinder based on control curves of rotating speed and pressure separately. The invention can realize infinite speed variation, adjust the pressure of the upper polishing plate, has good stationarity during processing and improves the polishing efficiency.

The invention discloses a hemostasis bandage, comprising a fixing plate of which the central part is provided with a through-hole, a screw column which passes through the through-hole of the fixing plate, a silica gel press block which is fixedly connected on the lower end of the screw column, a floating nut which is screwed on the screw column, a bandage body which is fixed on the fixing plate, a fixing belt which is connected to the two end sides, an outer rotary sleeve of which the bottom surface is opened and the top surface is provided with the through-hole, wherein the screw column passes through the through-hole, and a spring which is located between the top surface of the outer rotary sleeve and the floating nut. An annular pump formed by the outer circumference of the bottom surface of the outer rotary sleeve extending outside is arranged in an annular clamp groove which is formed by fixedly connecting the fixing plate with the bandage body. The inner lateral wall of the outer rotary sleeve is provided with a plurality of grooves which are matched with the convex edges in the outer lateral wall of the floating nut. The invention buffers the pressure through arranging the spring based on adjusting the compression strength and gives some mobility to person, so it has good hemostasis effect.

The invention relates to a porous bacterial cellulose skin repair material with a density structure and a preparation method thereof. The porous bacterial cellulose skin repair material with the 'upper dense and lower loose' structure similar to human skin is prepared by controlling the culture condition of bacterial cellulose and adding sustained-release microspheres in the culture process. A loose layer is tightly combined with a dense layer, so that obvious physical layering is avoided, and the structural continuity is good; and gradient changes of the structures are produced in the loose layer and the dense layer, and multiple pores distributed uniformly are formed in the loose layer, so that the upper dense and lower loose gradient structure of the human skin is simulated to the utmost degree. Cells easily enter the material, the healing period of a wound is obviously shortened, and proliferation of healed scars is effectively reduced; and good air permeability and water holding property of the bacterial cellulose are kept, the wound surface can be kept in a wet environment, and healing of the wound surface is facilitated. The forming process is simple, the culture period is short, the preparation process is environment-friendly, simple, convenient and quick, and the preparation cost is low.

An exposure apparatus is provided for performing exposure processes with high accuracy by accurately performing pressure control inside a chamber having a plurality of air-conditioning chambers. The inside of the main chamber which accommodates the exposure apparatus is divided into a plurality of air-conditioning chambers, and a pressure detection device which detects the pressure is provided with each of the plurality of air-conditioning chambers. Also, among the plurality of the air-conditioning chambers, the pressure inside a main column which accommodates an exposure stage on which a wafer in mounted and subjected to an exposure process, is set to be higher than the pressure of the other air-conditioning chambers based on detection results obtained from the pressure detection devices.

In the die cushion device, a shock absorber device relieves shock between a cushion pad and a support section. The shock absorber device includes a damping section and an elastic section. The damping section generates reaction force in accordance with the relative speed of the cushion pad with respect to the support section. The elastic section generates reaction force in accordance with the relative displacement of the cushion pad with respect to the support section. The controller section controls a servomotor so that a speed difference between the speed of the slide member and the speed of the support section is set to be a predetermined target speed difference value that changes over time.

The invention provides a method for preparing large-size bulk amorphous composite materials, which belongs to the field of preparing amorphous alloy (metallic glass) and composite materials thereof. The method applies to superplastic diffusion bonding of bulk amorphous substances and fiber, and is characterized in that the bulk amorphous substances and the fiber are arranged in a certain mode (such as a layered mode and the like), put into a mold, pressurized and thermally insulated under gas protection or vacuum for superplastic diffusion bonding; pressure is released after a certain period of time; and workpieces are taken out of the mold. The invention also provides a novel device for preparing large-size bulk amorphous, fiber/amorphous composite materials through superplastic diffusion bonding. The device consists of a heating system, a heat insulation system, a mold system, a loading system, a gas protection system and a cooling system. The method and the device have the advantages of reinforcing the fiber, enabling the shape of amorphous alloy-base composite materials to be designed, enabling the volume of the fiber in the composite materials to be controlled and enabling the fiber to be used in other various amorphous alloy systems low in amorphous formation capability, and are applicable to armor boards, armor-piercing shells and the like.

The invention relates to an air-lift reverse circulation drilling system used in deep water without marine riser and method thereof. The system includes a slurry injection system and an air-lift reverse circulation coreing drilling system; the slurry injection system includes a return cone, an injection pipe, a slurry injection pump and a slurry tank which are sequentially connected; the air-liftreverse circulation coring drilling system comprises an air compressor, an air-water faucet, a double-wall drill rod, an air-water mixer and a single-wall drill rod. The air compressor is connected with the air-water faucet. The lower end of the air-water faucet is connected with the double-wall drill rod. The lower end of the double-wall drill rod is respectively connected with the air-water mixer. The lower end of the air-water mixer is connected with the single-wall drill rod. The return cone is arranged on the outer wall of the drill rod connection. The system does not need a water-proof measure, realizes slurry circulation and well wall protection during drilling, and can be applied to any water depth; air-lift reverse circulation principle is used to convey core and debris so as to reduce construction time and cost; the requirements on the slurry injection pump is reduced and the reliability is good.

The invention belongs to the field of new energy power development and utilization, and particularly relates to a carbon dioxide based high-activity energy gathering agent and a preparation method thereof. The carbon dioxide based high-activity energy gathering agent is prepared from high-activity metallic powder, a high-energy oxidizer, explosion imitating agent particles and inert gas through mixing, and a mass ratio of the high-activity metallic powder to the high-energy oxidizer to the detonation imitating agent particles to the inert gas is 12:(0-3):(0-1):(1-2); the metallic powder is one or more of metallic sodium powder, metallic magnesium powder, metallic potassium powder and metallic aluminum powder; the particle size of the metallic powder is one or more of nanometer level, micrometer level and millimeter level. The carbon dioxide based high-activity energy gathering agent and carbon dioxide in a mass ratio being 1:(1-2) are mixed and subjected to a redox reaction, instantaneous carbon dioxide explosion shock waves and phase change shock waves are produced, and a high-temperature and high-pressure power source is formed, can supply strong power to the fields of buildings, civil engineering, machinery, automobiles, aviation, ships, ocean and the like and is a novel green power source.

The invention discloses an indoor truth-preserving sampling, sample storage and analysis device based on deep well sampling. The device comprises a high-pressure gas source system and a truth-preserving sampling system which is connected with the high-pressure gas source system and used for collecting a formation fluid sample, wherein the truth-preserving sampling system is respectively connected with an immediate decompression analysis system for performing online analysis on the formation fluid sample, a truth-preserving sample storage system for performing undisturbed preservation on a fluid in the formation fluid sample and a chemical online analysis system for monitoring and analyzing the formation fluid sample, and the truth-preserving sampling system, the immediate decompression analysis system, the truth-preserving sample storage system and the chemical online analysis system are connected with a waste water and waste gas treatment system. The invention further comprises an indoor truth-preserving sampling, sample storage and analysis method based on the deep well sampling. The method disclosed by the invention has the advantages of easiness in operation, and simplicity and convenience in operation; and modular integration is adopted, all modules are independent mutually, mutual interference of various samples can be avoided, and multi-formation and multi-position simultaneous sampling can be further realized.

The invention relates to a pedal decoupling type and integrated type brake master cylinder assembly for measuring integrated pedal displacement, which is composed of an integrated type brake master cylinder and a high pressure oil source, wherein the integrated brake master cylinder is composed of a brake pedal, a pressure sensor, a pedal sensation simulator and a cut-out magnetic valve, a brake boosting piston, brake master cylinder pistons and reset springs; the high pressure oil outlet of the high pressure oil source is connected with the integrated brake master cylinder, so that stable and continuous brake energy is provided in the brake process. The brake master cylinder assembly has a compact structure, is high in integrated level, improves brake pedal sensation of a vehicle, has the active hydraulic boosting function in the situation of normal brake, has the passive hydraulic boosting function in the failure situation, efficiently ensures the brake safety of the vehicle, can be used for a brake-by-wire system of a conventional vehicle, and can be widely used for a brake system of a battery electric vehicle, a brake system of a hybrid powered vehicle and a fuel cell vehicle electro-hydraulic compound brake system.

The invention provides a seepage instrument and a test system for testing disturbed seepage characteristics of broken rock. The seepage instrument comprises a frame, a cylinder barrel, a piston, a disturbance ring and a crank sliding block mechanism; the test system comprises the seepage instrument, a detection system, a water supply system, a hydraulic servo system and a drainage system; the water supply system is used for supplying a water source to a double-action hydraulic cylinder in the hydraulic servo system; the hydraulic servo system is used for supplying stable running water to one end of the seepage instrument through the double-action hydraulic cylinder; the other end of the seepage instrument is connected with the drainage system and the detection system. The seepage instrument and the test system are capable of really simulating the complex dynamic coupling environment of the broken coal rock under the influence of mining disturbance and accurately researching the disturbed seepage characteristics of the broken rock.

The invention discloses a method for preparing a biological medical porous titanium material, which comprises the following steps of: mixing titanium powder or titanium-alloy powder wtih titanium-hydride grains, applying pulsed voltage in a vacuum environment or under the protection of reducing gas to generate plasma for activating the grain surface of a mixed-powder material, rapidly heating the powder material to the temperature of 800-1100 DEG C by using direct current under normal pressure after finishing activation, then shutting down the direct current, and cooling to obtain the required material. The invention can realize the regulation and control for a pore structure within a larger range through regulating the quantity and the grain diameter proportion of metal powder and pore formers and controlling process parameters and essentially improves the performance of sintered materials. The method realizes low-temperature sintering, the sintering time is greatly shortened, and the temperature is greatly decreased. Compared with a traditional sintering process, the energy consumption quantity is decreased, and the equipment loss is reduced.

The present invention relates to a hydraulically coupled electro-hydraulic braking system, aiming at solving some problems existing in the current electro-hydraulic brake system. The hydraulically coupled electro-hydraulic braking system includes a manpower hydraulic cylinder, a booster cylinder, a brake master cylinder, brake pedal, pedal stroke sensor, booster motor, booster transmission assembly, normally open solenoid valve, normally closed solenoid valve, check valve A, check valve B, hydraulic control unit HCU, hydraulic pressure sensor, an electronic control unit ECU, and other structures. The hydraulically coupled electro-hydraulic braking system has three working modes of conventional braking, active braking and failure backup, and has the structure of hydraulic cylinder. The invention adopts a novel hydraulic coupling scheme, eliminates the reaction disk structure, the pedal force of the driver and the brake assisting force are coupled through the hydraulic mode, and the control algorithm of the whole brake system is simplified because the reaction disk structure is eliminated, and the control method is convenient to control.