58results about How to "Achieve pressure control" patented technology

A semiconductor device includes an Nch transistor having a first gate electrode and a Pch transistor having a second gate electrode. The first gate electrode and the second gate electrode are made of materials causing stresses of different magnitudes.

The invention relates to an image hybrid processing method and device. The method comprises the steps that a background base graph is created, a dynamic texture is drawn on the background base graph, and at least one part of the dynamic texture is not transparent; an input touch event is received, and position parameters and pressure parameters in the touch event are acquired; a graph brush tool is created, and a transparency increase value of the graph brush tool is dynamically adjusted according to the pressure parameters in the touch event; a moving trail of the graph brush tool is dynamically adjusted according to the position parameters in the touch event; and the graph brush tool is utilized to increase the transparency of the dynamic texture in a region which the moving trail of the graph brush tool passes through, and the dynamic texture and the background base graph are mixed. According to the method, the transparency increase value is adjusted according to the pressure parameters of pressing, and the trail is adjusted and erased according to the position parameters of pressing, so that true erasing operation with a pressure sense is simulated, and the feedback effect is more consistent with user operation.

The invention discloses an air brake pressure control system and a brake control method. The system comprises an air inflation electromagnetic valve, an exhaust electromagnetic valve, a pressure sensor, a detection module, a pressure control unit and a controller, wherein controller comprises a learning record module and an abnormal control module. According to the brake control method, a synchronous learning and a recording control strategy of the learning record module is utilized, when signals of the pressure sensor are abnormal, the abnormal control module calls the control strategy of thelearning record module, and the air inflation electromagnetic valve or the exhaust electromagnetic valve is controlled to gradually reach the target pressure according to the corresponding control strategy. Compared with a certain fixed state that a control electromagnetic valve is in the normal power or normal power loss, the pressure of a pressure chamber to be controlled is more accurate.

The invention relates to a lifting type pressure control valve with an isolating function used in vacuum equipment. A vacuum pressure control valve includes a valve body, a valve cavity is formed in the valve body which is provided with at least two joints which can enable the valve cavity to communicate with the outside, and the position, corresponding to at least one of the joints, in the valvecavity is provided with a valve seat; a valve core includes a valve plate and a valve rod which are fixedly connected with each other, a coupler includes a support and a coil and an armature which arefixed to the support, an opening actuator is used for driving a support of the coupler to move up and down, and the coupler is arranged above the valve body; and the valve core is arranged in the valve cavity, the valve plate is matched with the valve seat, and the valve rod penetrates through the valve body to be fixedly connected with the armature arranged above the valve body. According to thevacuum pressure control valve, the flow can be precisely regulated in the wide conductance range through a pure electric connection system, thereby realizing the precise pressure control, and achieving isolating and emergency power-lossing protection; and the vacuum pressure control valve is suitable for the exhausting control and the process pressure control from barometric pressure to lower middle vacuum.

The invention discloses a BOG condensation recycling system for an LNG station. A liquid inlet pipe of an immersed pump (3) is connected with a liquid drain pipe of an LNG storage tank (1) through a pipeline. A liquid drain pipe of the immersed pump (3) is connected with a gas filling machine through a pipeline and further connected with a heat source channel inlet of a BOG condensation recoverer (2) through a pipeline. A heat source channel outlet of the BOG condensation recoverer (2) is connected with a liquid drain pipe of a liquid nitrogen storage device (4) through a pipeline. A cold source channel outlet of the BOG condensation recoverer (2) is connected with a nitrogen blow-down pipe. The invention further discloses a method for recycling BOG. The BOG condensation recycling system and method have the beneficial effects that cost is reduced, zero discharge of BOG in the storage tank is achieved, energy is saved, and pollution to environment is avoided.

The invention discloses an airplane surface paint stripping and grinding device based on pressure intensity control and relates to the technical field of grinding equipment. The airplane surface paintstripping and grinding device based on pressure intensity control comprises a grinding unit, a telescopic limiting unit, at least three thin-film switches and a curved surface adaptation unit, wherein the grinding unit comprises a rotating assembly arranged in a lower shell, a ball spline shaft coaxially assembled with the rotating assembly and a grinding assembly at the lowest end; the driving end of the telescopic limiting assembly is coaxially assembled with the upper end of the ball spline shaft; the at least three thin-film switches are arranged at the grinding end of the grinding assembly; and the curved surface adaptation unit comprises a curved surface adaptation assembly movably connected with the lower shell and a guide assembly connected fixedly. According to the technical scheme of the airplane surface paint stripping and grinding device based on pressure intensity control, disclosed by the invention, the thin-film switches are mounted on a grinding head, and the effectivecontact area is measured in real time; and through combination with cylinder pressure, the pressure intensity of the grinding surface is controlled. The airplane surface paint stripping and grindingdevice based on pressure intensity control has the advantages of being controllable in pressure intensity of the grinding surface, wide in application range, good in grinding effect, simple in structure and low in cost.

The invention relates to an industrial furnace for roasting carbon products, which comprises a roasting pot, a condenser, a connecting pipe, a vacuum pump, and pressure control valves; The roasting pot comprises a housing, a cover, a gasket, a heating element, and a thermal insulation layer; the condenser comprises a container and a condensing tower; the pressure control valves are respectively mounted at a protective gas inlet of the roasting pot and a gas outlet at the top of the condenser, and can ensure the operation of the system at a micro-positive pressure. The connecting pipe is a metal pipe lined with a thermal insulation layer. During system operation, vacuum-pumping is carried out firstly to discharge all the air, and protective gas is injected; during the whole roasting period, the system is maintained to be airtight so as to realize effective control of the roasting atmosphere. The roasting furnace of the invention solves the problems of difficult roasting of large-size carbon products, large pollution, and the like.

The invention provides a constant-tension taping machine which comprises a base plate, a tape releasing device, a taping device and a controller. A main shaft is rotationally arranged at an upper endof a fixed seat and is in transmission connection with a first driving mechanism, the tape releasing device is fixedly arranged at a right end of the main shaft, an inner shaft is rotationally arranged in the main shaft and is provided with a wire passing hole, and one end and/or two ends of the inner shaft are fixedly connected with the base plate; the tape releasing device comprises a tension adjusting mechanism, a left baffle, a tape storage barrel and a right baffle. The left baffle, the tape storage barrel and the right baffle are sequentially connected to the right end of the main shaftin a sliding and sleeving mode, the right baffle is in transmission connection with the main shaft through a key body, and the tension adjusting mechanism can control tension on a discharged tape material by adjusting pressure exerted on two end faces of the tape storage barrel by the left baffle and the right baffle. The taping device is fixedly arranged at a right end part of the main shaft. According to the taping machine, the same transmission system is adopted for the tape releasing device and the taping device, and the controller applies friction torque to the tape storage barrel in realtime through the tension adjusting mechanism so as to achieve the constant control over the tension value of released tape material.

The invention relates to the technical field of medical instruments, and discloses a sample application instrument, which comprises a gas path module and a liquid path module comprising a liquid storage bin and a liquid conveying pipe. The gas path module is communicated with the liquid storage bin, and one end of the liquid conveying pipe is communicated with the liquid storage bin; the gas pathmodule adjusts the air pressure in the liquid storage bin so as to control liquid discharging of the other end of the liquid conveying pipe. According to the sample application instrument disclosed bythe invention, the liquid outlet of the liquid conveying pipe in the liquid path module is controlled by arranging the gas path module, the sample liquid is promoted to flow out of the liquid conveying pipe by utilizing micro-pressure, the sample liquid is controlled by the air pressure, and is contacted with a sample application plate at the dripping moment to form an array, so that sample application is completed. The sample application instrument simultaneously solves the technical problems of a non-contact injection sample application instrument and a contact needle sample application instrument, a semi-contact sample application method is innovated, and the sample application method has the advantages of large sample point volume, low requirement on sample application environment andhigh sample application speed, a problem of abrasion of a needle head of a sample application needle is solved, and the sample application instrument is suitable for large-scale industrial production.

The invention discloses a blocking tool in an oil pipe for operation under pressure. A deblocking spear rod is arranged in a central pipe in a penetrating manner; an unsealing pin is fixed on the upper end cap, and the upper end cap is fixed on the central pipe; a sealing rubber cylinder is limited on the central pipe by a rubber cylinder gland; the central pipe is a hollow pipe body; a linkage plunger is arranged in the lower end of the central pipe in a penetrating mode and is sealed to form a sealed cavity; a first connecting shaft penetrates through a through hole of a rubber sleeve expansion sealing push ring, a first key groove type through hole and a through hole of the linkage plunger, and is fixed connected with the rubber sleeve expansion sealing push ring; the rubber cylinder expansion sealing push ring and the linkage plunger are connected and move synchronously; an anchor tile conical base is sleeved and fixed on the central pipe through a locking pin, a setting pin limitsrelative movement of the linkage plunger and the central pipe, a slip is embedded between the anchor tile conical base and the conical body, and a second connecting shaft penetrates through a throughhole of an anchor tile propelling ring, a second key groove type through hole and a through hole of the linkage plunger to be fixedly connected with an anchor tile propelling ring. According to the invention, the self-setting can be realized, and the salvage can also be realized.

The invention discloses a medical body temperature maintaining mechanism, which comprises a shell provided with an air inlet channel, and another shell provided with a filtering channel, wherein one end of an air inlet of the air inlet channel is provided with a PTC (Positive Temperature Coefficient) heater, the other end of the air inlet is provided with a direct current air pump, one end of thefiltering channel is communicated with the air inlet, the other end of the filtering channel is communicated with the outer world, a filter screen is arranged in the filtering channel, an air outlet is provided with a blast tube, the other end of the blast tube is connected with a protective blanket with a cavity or a semienclosed warm box, an air outlet end of the blast tube is respectively provided with a control valve, a spirally arranged clamp slot used for fixing an infusion tube in the warm box, and a flow control valve for controlling liquid flow in the infusion tube, a plurality of air vents are distributed on the protective blanket, the shell is provided with a control component for adjusting the output power of the PTC heater and the air pump, the warm box and the protective blanket are provided with temperature sensors used for measuring the temperature of air of the protective blanket and the temperature in the warm box, and the temperature sensors, the PTC heater and the air pump are respectively electrically connected with the control component.

The invention discloses a constant-pressure operation control method for a steam turbine generator unit. The constant-pressure operation control method comprises the following steps: transmitting an inlet steam pressure signal of a steam turbine inlet steam pressure sensor to a steam turbine control device; providing an inlet steam pressure setting signal, an automatic pressure control input signal and an automatic pressure control exit signal for the steam turbine control device by a control system; comparing the received inlet steam pressure signal with the inlet steam pressure setting signal by the steam turbine control device; after PID (Proportion Integration Differentiation) operation, providing an amplified output valve position instruction signal for a servo valve position controller; comparing and amplifying the received output valve position instruction signal and a feedback signal of a governing valve actuator by the servo valve position controller; outputting a governing valve instruction signal to a governing valve; changing the opening degree of the governing valve; dynamically regulating the steam pressure at the inlet of a steam turbine; and operating the steam turbine generator unit under a constant pressure. According to the constant-pressure operation control method, automatic steam pressure control of the steam turbine generator unit is achieved, and constant-pressure operation of the steam turbine generator unit is achieved.

The invention relates to a fuel injection system of an internal combustion engine, in particular a common rail injection system, comprising a mechanical fuel delivery pump, which supplies fuel to a high pressure pump via a low pressure line. The high pressure pump feeds highly pressurized fuel to a high pressure accumulator via a high pressure line, wherein the delivery volume of the fuel delivery pump can be regulated via a pressure controller.