130 results about "Pressure level" patented technology

An air mattress adjustment method includes adjusting the air mattress to a received user pressure setting, learning a level of pressure in the air mattress at a first plurality of times with respect to the user pressure setting, monitoring the level of pressure in the air mattress at a second plurality of times, determining that the pressure of the air mattress at one of the second plurality of times is out of range, and based on the determining, adjusting the pressure of the air mattress.Application. docx

The invention discloses a reinforcement learning reward function construction method and system based on multi-modal physiological signals. The method belongs to the technical field of automatic driving, artificial intelligence and man-machine interaction. The basic defect that balance cannot be obtained between a task target and the physiological comfort of a driver and passengers exists in the design of an existing reward function is overcome. The core technical idea is a two-stage decoupling architecture, wherein the first stage is an offline training stage, and the purpose of the first stage is to train a'physiological reward agent model '; and a second stage (reward generation and deployment stage): in this stage, the real-time dependence on all multi-modal physiological signals and acquisition equipment thereof is completely abandoned. The physiological reward agent model trained in the first stage is only used for conducting batch processing on any data set only containing vehicle state data and driving behavior data, the physiological pressure level is deduced, and a physiological reward is calculated according to the physiological pressure level.

A system for evacuating and sealing containers filled with product, for example, food product, includes an enclosed, sealed housing wherein the pressure level and the atmospheric content can be controlled. A vacuum shroud is positioned in registry with a container entrance opening in the housing, the shroud connectible to a vacuum source and to a source of replaceable gas to replace the ambient air to be removed from the container. The shroud is advanceable to seal the container entrance opening and is retractable from the container entrance opening. A container transport system inserts the container through the housing entrance opening and into the shroud. Thereupon, a sealing system seals the housing from the ambient after the container has been inserted into the shroud. After the air in the container has been replaced with an inert gas and then the shroud retracted, a closure subsystem applies a cover to the evacuated container. Thereafter, an out feed subsystem removes the closed container from the housing while maintaining the atmospheric content and pressure level within the housing.

Method for operating a forming device for forming plastic preforms into plastic containers, wherein the forming device (1) has a movable carrier (20) on which a plurality of forming stations (2) are arranged, wherein each of these forming stations in an operating operation forms plastic preforms (10) into the plastic containers by applying a flowing and in particular gaseous medium, wherein in the operating operation the plastic preforms are subjected to at least two different pressure levels for their expansion and at least two valves are used for this application, characterized in that at least a measured value is determined at least temporarily, which is characteristic for a switching time and / or a switching time delay of at least one of the valves, wherein this measured value results from a pressure measurement.

A device for compressing limbs and a method for compressing lower limbs by using same are provided. The limb compression device comprises: first to Nth air cells sequentially arranged from a front end of a limb toward a body in the longitudinal direction of the limb; a pressure adjustment unit, which can inject air into the N air cells and discharge the air from the air cells so as to pressurize and depressurize same; and a control unit for controlling operation of the pressure adjustment unit. The N air cells are divided into: a first cell group including one or more air cells arranged closer to the front end of the limb; and a second cell group arranged closer than the first cell group to the body. The control unit performs over-pressurization control in which the first cell group is pressurized up to an over-pressure level and then depressurized, and then performs sequential pressurization control in which the first cell group is pressurized, the second cell group is subsequently pressurized, and then the first cell group and the second cell group are depressurized.

This application discloses a method for optimizing the hub profile of an axial flow fan blade. The method includes: real-time acquisition of fan operating conditions to obtain the current fan speed and outlet back pressure, forming an operating condition vector; inputting the operating condition vector into a pre-trained adaptive prediction model, which outputs the optimal hub profile parameter vector corresponding to the current operating condition; the optimal hub profile parameter vector is set as a dynamic variable related to the operating condition vector, and the optimal hub profile parameter is pre-obtained based on a multi-objective comprehensive performance evaluation function with blade passing frequency sound pressure level and fan aerodynamic efficiency as optimization objectives, through adaptive optimization under different operating conditions; and dynamically adjusting the hub profile of the physical axial flow fan according to the optimal hub profile parameter. Thus, real-time adaptive adjustment of the axial flow fan hub profile to operating conditions is achieved.

The invention relates to a compressor (100) and a heat exchanger (400) for a refrigerant circuit (1000, 1100), as well as a corresponding refrigerant circuit (1000, 1100) and a vehicle with such a compressor (100), heat exchanger (400) and refrigerant circuit (1000, 1100). The compressor (100) has a longitudinal axis (120) and is configured to receive refrigerant via a suction-side first inlet port (152) arranged at a first axial end (111) of the compressor (100), to compress it from a low-pressure level prevailing at the suction-side first inlet port (152) to a high-pressure level, and to discharge it again via a pressure-side outlet port (156) arranged at a second axial end (112) of the compressor (100).A housing (110) of the compressor (100) has on an outer surface (130) a receptacle for a compressor control unit (140) and at least one refrigerant channel (150) which is configured to convey refrigerant at a pressure level below the high pressure level, wherein the at least one refrigerant channel (150) leads from the second axial end (112) of the compressor (100) to the first axial end (111) of the compressor (100) and is arranged at least partially along the outer surface (130) with the receptacle.

The invention relates to a device and a method for foaming building materials with CO₂ 2 for the production of a building component and / or building insulation. The device comprises a conveying device (2) and, downstream, a construction material line (3) in which one or more injection nozzles (4) are arranged to inject liquid CO into the stream of construction material. 2 to inject. The pressure level in the building material line (3) is maintained such that the injected CO₂ 2 remains in its liquid state. The building material as well as the CO 2 downstream they enter a mixing device (9) and then at least one or more decompression pumps (11), which ensure controlled decompression of building material and liquid CO₂ 2without significant cooling and segregation. Downstream, a dispensing device (19) is arranged, which is configured to dispense the material for the production of a component and / or building insulation. Depending on the addition of CO 2 This allows the layers within a component to be modified with respect to their density and thus their properties in terms of load-bearing capacity, heat transfer, and mass. If the amount of CQ is kept constant during the process, 2 injected, which the building material in gaseous CO 2 The material that can be absorbed in the suspension forms a building material foam, for example, in the form of building insulation. The invention further comprises a corresponding method for manufacturing components using such a method.

An electric drive system (30) with temperature preconditioning of the operating fluid, comprising an electric machine with rotor (2) and stator (1) and winding heads (21) axially terminal on the stator (1), as well as a gearbox (24) and a hydraulic arrangement for supplying the components of the drive system with the operating fluid with at least one electric pump (4), wherein the winding heads (21) are each surrounded in an annular manner by a housing (22) which is designed as a winding head tank (23) for receiving the operating fluid, characterized in that the pump (4) fills the winding head tanks (23) with a first pressure level and supplies the components of the electric drive system (30) with operating fluid with a second pressure level.

The invention relates to a refrigerant circuit (100) with a compressor (150) for compressing a gaseous refrigerant, which in particular contains propane, from a suction-side low-pressure level to a discharge-side high-pressure level, at least two heat exchangers (110, 120, 130), of which a first heat exchanger (110) and a second heat exchanger (120) are configured for transferring heat between the refrigerant and a, in particular liquid, temperature control medium, and at least one expansion valve (122, 132, 142) for expanding refrigerant compressed by the compressor (150), wherein at least one of the at least two heat exchangers (110, 120, 130) is supported by a carrier plate (180), wherein at least one refrigerant channel (182) runs within the carrier plate (180), which is configured to supply refrigerant to or from at least one of the at least two heat exchangers (110, 120, 130).130) and / or to or from at least one of the at least one expansion valve (122, 132, 142). The carrier plate (180) has at least one subcooling channel (188) comprising at least two adjacent channel sections (188A, 188B) which are fluid-conductingly connected to each other via a deflection section (188C). Furthermore, a carrier plate (180) for such a refrigerant circuit (100) and a vehicle with such a refrigerant circuit (100) are proposed.

This invention relates to the field of motor rotor copper busbar processing technology, and discloses a control method and system for a wound-rotor rotor bar forming machine. The method includes: setting parameters such as the straight length of the bar, bending angle, initial end length, and rotor center position; adjusting the straight spacing, end position, and R-block size of the clamping plates; determining the pressure level and selecting a target pressure value; applying reverse balancing oil pressure through a pressure reducing valve to adjust part of the tensile force; controlling the clamping plates to clamp the bar, and then driving the first and second swing arms to rotate; collecting the angle values ​​of the first and second swing arms; when the angle value reaches the bending angle, controlling the power source to stop, and the first and second top-arc components cooperate to bend the bar into a motor rotor bar; after bending, driving the first and second swing arms to move outward and removing the bar. This application improves the equipment adjustment efficiency and bending angle accuracy.

A device and related aspects for providing negative pressure to a wound site are disclosed. The device includes: a negative pressure source configured to provide negative pressure to the wound site from an inlet of the negative pressure source via a first fluid flow path; and an electronically controllable valve configured to release negative pressure from the wound site via a second fluid flow path. The device also includes: a pressure sensor configured to measure a pressure level in the second fluid flow path; and a control circuit system operatively connected to the negative pressure source, the electronically controllable valve, and the pressure sensor. The control circuit system is configured to open the electronically controllable valve and, in response to a pressure change rate exceeding a pressure change rate value, output a signal indicating blockage in the second fluid flow path. The control circuit system is further configured to close the electronically controllable valve and activate the negative pressure source in response to a pressure change rate below a pressure change rate value, and to output a signal indicating blockage in the first fluid flow path in response to a pressure level measured by the pressure sensor not responding to changes in negative pressure generated by the activity of the negative pressure source.

To provide a suction and irrigation system for maintaining an in situ pressure of an anatomical environment at an anatomical site under control during an endoscopic procedure.SOLUTION: Systems and methods for providing in-situ pressure control in an anatomical environment during a procedure are disclosed. The example irrigation and aspiration system includes a user input configured to receive, from a user, a desired pressure to be applied to the anatomical environment or a desired flow condition corresponding to the desired pressure. The system comprises a pressure sensor for sensing a pressure at or near the anatomical environment during the procedure, and a control module for adjusting one or more of an irrigation flow rate or an aspiration flow rate of at least one working channel of the medical device to maintain the pressure in the anatomical environment substantially at a desired pressure level or to maintain desired flow conditions in the working channel.SELECTED DRAWING: Figure 1

Example implementations relate to a pressure regulator assembly for a closed fluid loop of a CDU. The pressure regulator assembly has a cylinder having an internal volume, and first and second hollow pistons slidably connected to the cylinder to split the internal volume into a first volume portion having cooling fluid, a second volume portion having driver fluid, and a third volume portion having compressible matter. The first volume portion is fluidically connected to the closed fluid loop. The first hollow piston is reciprocated by the compressible matter to maintain operating pressure of the cooling fluid in the closed fluid loop. The second hollow piston is driven by the driver fluid in response to predefined pressure drop of the cooling fluid during predefined time period, to inject additional cooling fluid from the first volume portion into the closed fluid loop to restore pressure level of cooling fluid to operating pressure.

Method for forming plastic preforms (10) into plastic containers (20), wherein plastic preforms (10) are fed to a plurality of forming stations (24) for forming plastic preforms, and these forming stations (24) are arranged on a movable carrier and are transported by means of this carrier along a predetermined transport path (P), and wherein the plastic preforms (10) are expanded into the plastic containers during this transport by being supplied with a flowable medium, wherein the plastic preforms are each supplied with at least two different pressure levels for their expansion, and wherein this supply is controlled in each forming station by means of at least two valves, and wherein a drawing bar is further inserted into the plastic preforms in each forming station, and wherein at least one first valve measurement value (MV1) is determined.which is characteristic for a switching operation of at least one of the valves and wherein at least one first pull rod measurement value (MR1) is determined which is characteristic for a movement of the pull rod, characterized in that a blow curve profile (K1) is determined which is characteristic for a time-dependent behavior of a pressure and this blow curve profile (K1) is related to at least one of the measured values ​​(MV1, MR1).

A dynamic aspiration system includes a vacuum source, an aspiration catheter, a connecting tube, controllable valves to control a level of pressure in the aspiration catheter or the connecting tube, pressure sensors to detect pressure readings, and a controller capable of utilizing an artificial neural network (ANN) trained to predict flow state classifications. The controller may receive pressure readings from the sensors, provide the pressure readings as input data for the ANN, classify, via the ANN, a current flow state in the aspiration catheter or the connecting tube based on outputs generated by the ANN, and operate the controllable valves based on the classification of the current flow state. The controller operates the controllable valves in a first pressure protocol if the classification by the ANN is restricted or obstructed, and operates the controllable valves in a second pressure protocol if the classification by the ANN is unrestricted.

A pressure supply unit for providing a first target pressure level and a second target pressure level, includes a pump for drawing in a fluid, a first fluid flow control component, and a second fluid flow control component. The first fluid flow control component is arranged on a first side of the pump that controls the fluid flow according to a first current pressure level and is thus configured to provide the first target pressure level on the first side of the pressure supply unit. The second fluid flow control component is arranged on a second side of the pump that controls the fluid flow according to a second current pressure level and is this configured to provide the second target pressure level on the second side of the pressure supply unit.

A method for forming plastic preforms into containers, wherein a transport device transports the preforms along a transport path. The transport device has a rotatable transport carrier where forming stations are arranged for forming the preforms into containers. The forming stations each have devices which apply a flowable medium to the preforms, and the apparatus has three pressure reservoirs which store the flowable and gaseous medium to expand the preforms. The preforms are applied to a first operating mode with a first pressure level stored in the first pressure reservoir, and at least one second and one third pressure levels stored in the second and third pressure reservoirs. The second pressure level is higher than the first, and the third pressure level is higher than the second. The apparatus is operated in a second operating mode, which differs from the first mode by pressure level prevailing in the second pressure reservoir.

A milking system, including: a vacuum pump, a receiver, a milk line, and a plurality of milking units. Each milking unit is connected to the milk line via a respective milk conduit. Each milking unit is also associated with a respective valve arrangement, arranged in the milk conduit, wherein the valve arrangement includes an adjustable passage for adjustment of the fluid pressure. The system also includes a pressure sensor, arranged to measure fluid pressure in the milk conduit upstream the valve arrangement; and a controller. The controller is configured to obtain a pressure level measurement from the pressure sensor and generate and provide a control signal to the valve arrangement, to adjust the adjustable passage, based on the pressure level measurement.

The utility model relates to the technical field of graphite methanol vaporizer, especially to a new round block hole formula graphite methanol vaporizer sealing structure, its can effectively solve the problem of multiple sealing points and gasket corrosion failure, can better satisfy the use requirement under various temperature and various sealing conditions, guarantees pressure level and sealing effect, is convenient for detection and reduces the leakage risk, including steel cylinder, cylinder flange, lower cover plate, graphite seal head, stud bolt, nut, heat exchange block and sealing assembly, the cylinder flange is installed to steel cylinder end part, and the lower cover plate and cylinder flange are connected through a plurality of stud bolts and nuts between, the graphite seal head is installed to cylinder flange inboard in steel cylinder interior, and the graphite seal head outside is connected with the lower cover plate contact through the sealing assembly.

The shuttle valve spool includes a substantially cylindrical spool body having a shell surface and an axial through bore defining a longitudinal axis. Hydraulic fluid can be directed to a valve chamber formed in the through bore via first and second axial ends of the spool body having different pressure levels. The valve body is housed within the valve chamber and is axially slidable from the first shoulder to the second shoulder and vice versa, such that higher pressure can be directed to the valve chamber and further to at least one collection area on the first circumferential portion of the shell surface via the radially oriented outlet aperture. The discharge region is formed as another recess on the second circumferential portion of the shell surface, which is circumferentially spaced from the collection region by the filtration region. The radial distance from the collection region, the discharge region, and the filter region to the longitudinal axis is less than half the diameter of the shell surface, and the radial distance from the filter region to the longitudinal axis is greater than the radial distance from the collection region to the longitudinal axis.

The invention discloses a pressure regulation and overpressure protection process method for an oil product receiving terminal, and relates to the technical field of medium and long distance oil pipelines. A pressure regulation and overpressure protection process method of an oil product receiving terminal divides a pressure protection gradient into five levels, the pressure protection gradient is based on a pressure cascade protection principle, a basic process control system, an ESD emergency shutdown system and mechanical protection measures are integrated, and accurate pressure regulation and comprehensive overpressure protection of a pipeline and an equipment system are achieved. The process flow is simple and practical and easy to understand and implement, the functions of split-range pressure adjustment, thermal release mechanical protection, safety interlocking and water attack release protection are achieved, and skid-mounted design, production and manufacturing are easy to achieve.

The application provides a tunneling teaching machine hydraulic system, and belongs to the technical field of hydraulic systems. The tunneling teaching machine hydraulic system comprises a pushing module, a conveying module, a supporting module, an articulated module, an overbreak cutter module and a system power pump station for providing oil sources for the five modules. The application integrates all functions of actual tunneling, can complete testing of domestic control systems, can realize testing of the tunneling machine hydraulic system before being mounted, can complete preliminary testing of certain special working conditions, and can shorten the development cycle. Since it is simulation testing, each module does not need to be set to the actual size, and the layout of each module also does not need to be set to the actual layout, and can be as small as possible, which not only can meet the simulation of the working conditions of the actual tunneling hydraulic system, but also can greatly save the cost, improve the testing efficiency and reduce the time consumption. Meanwhile, by merging the power oil sources, the modules with similar pressure levels are integrated together, which can save the energy consumption and improve the energy utilization rate.

Device for conveying a shingled stream of sheets to a sheet processing machine, comprising a conveying table (9) which has at least one continuously driven, air-permeable conveyor belt (26) which can be subjected to negative pressure on an underside of its upper belt (26) sliding over the conveying table (9) by a first suction chamber (28), a second suction chamber (29) and a third suction chamber (30), wherein the third suction chamber (30) is the last suction chamber upstream of the sheet processing machine (1) and suction air of different pressure levels can be supplied to it in sync with the sheet processing machine (1), characterized by that the third suction chamber (30) is preceded by a further suction chamber (41) to which suction air at different pressure levels can be supplied in sync with the sheet processing machine (1), that the third suction chamber (30) and the further suction chamber (41) can be subjected to high and low vacuum pressures in phase shifts by a common rotary valve (38), that the third suction chamber (30) and the further suction chamber (41) are arranged at a distance (a) from each other and that at the distance (a) a part of the second suction chamber (29) is arranged.

The invention relates to a level control system and a level control method for a vehicle, by which a vehicle body is cushioned relative to a vehicle axle, comprising a compressor, an air spring and a first compressed air reservoir for a first pressure level, wherein the suction side of the compressor is connected to the atmosphere via an atmosphere line, wherein the air spring and the first compressed air reservoir are connected to the compression side of the compressor via a supply line, further comprising a first pressure line, by which the first compressed air reservoir can be connected to the suction side of the compressor via a first valve. A second compressed air reservoir is provided for a second pressure level, which is higher than the first pressure level, wherein the second compressed air reservoir can be connected to the compression side of the compressor via the supply line, wherein the second compressed air reservoir can be connected to the reservoir line of the first compressed air reservoir via a second connection valve by means of a second connection line, so that the level control system can be operated in cascade.

The invention relates to a valve system (21; 71) for supplying a pneumatic actuator (2; 52), comprising a supply port (22; 72), an exhaust port (23; 73), a first working port (24; 74) to which a first pressure sensor (43; 63) is assigned, and a second working port (25; 75) to which a second pressure sensor (44; 64) is assigned, as well as a first valve group (31; 81) and a second valve group (32; 82), and a control device (28; 78) configured for evaluating a first pressure signal from the first pressure sensor (43; 63) and comprising a first pressure regulator for controlling the first valve group (31; 81) and a second pressure regulator for controlling the second valve group (32; 82).82) and is designed for setting a first maximum pressure level for the first pressure regulator and a second maximum pressure level for the second pressure regulator.;

The application discloses a kind of special low permeability sandy conglomerate reservoir well bottom flow pressure level keeping prediction method, including the statistical special low permeability sandy conglomerate body oil reservoir core sample's permeability and pressure sensitivity relationship data;Calculate the ratio of the permeability of rock sample under each level net confining pressure condition and the permeability tested under initial net confining pressure condition;Draw the relationship curve of net confining pressure value and permeability change rate;Predict the permeability loss ratio of reservoir near the bottom of production well with the increase of production pressure difference;Calculate production pressure difference, compare permeability classification data, calculate the permeability reduction ratio in the range of salt well bottom and the influence on fluid production rate.The application is mainly aimed at the production characteristics of the production well of special low permeability sandy conglomerate reservoir, explains the internal cause of its change, and provides development theoretical basis;It has guiding significance for the initial development mode, method and production pressure control of special low permeability sandy conglomerate reservoir.

A pump for pumping a cryogenic liquid includes a pump housing having a cylinder with a piston slidably positioned therein. An intermediate fluid chamber that receives an intermediate fluid is defined within the cylinder adjacent to a first end of the piston and a fluid pumping chamber is defined within the cylinder adjacent to a second end of the piston. An intermediate fluid seal is attached to the piston and engages the cylinder. A pumped fluid seal attached to the piston and configured to engage the cylinder, said pumped fluid seal spaced from the intermediate fluid seal so that a differential pressure space is defined within the cylinder between the intermediate fluid and pumped fluid seals. A differential pressure vent valve is in fluid communication with the differential pressure space. A differential pressure switch senses a pressure within the differential pressure space and opens the differential pressure vent valve when the pressure within the differential pressure space reaches a predetermined pressure level.

This invention discloses a closed-loop pressure-controlled tea kneading device and a precise pressure application method, relating to the field of tea processing machinery. The device includes a frame, kneading discs, a kneading drum, a pressure cap, and a pressure application mechanism. The frame features an integrated rigid support cantilever, which is equipped with the pressure application mechanism, a dual-sided pressure detection mechanism, a servo drive mechanism, and a controller, forming a closed-loop pressure control system. The pressure application mechanism uses a gear steering box in conjunction with a helical pressure rod to achieve coaxial pressure application. The pressure detection mechanism collects pressure signals through dual-sided sensors, and utilizes pre-compression springs for buffering and vibration reduction. The pressure application method achieves constant pressure kneading through preset pressure levels, real-time pressure acquisition, closed-loop dynamic fine-tuning, and automatic reset. This invention solves the problems of inaccurate pressure control and unstable pressure application in traditional equipment. It provides precise pressure detection and uniform, stable pressure application, adaptable to different tea processing methods, reduces tea breakage, and improves kneading quality and processing efficiency.