449 results about "Pressure range" patented technology

The invention provides a dust collection base station, a dust cup, a cleaning device and a dust collection method, and belongs to the field of cleaning devices. The dust collection base station comprises a base station body and an uncovering structure, a containing groove is formed in the end of the base station body, the uncovering structure is located on the side wall of the containing groove, and the uncovering structure is configured to trigger a dust discharging cover of a dust cup to be unlocked if air pressure in the containing groove is within a preset negative pressure range. Due to the fact that the air pressure in the containing groove is within the preset negative pressure range during unlocking, the air pressure difference between the interior of the dust cup and the interior of the containing groove is within the acceptable range, and impact generated when the dust discharging cover is opened under the action of the air pressure difference between the two sides is also within the acceptable range. The sundries in the dust cup enter the containing groove under the action of the air pressure difference in the dust cup and the containing groove, residues of the sundries in the dust cup are reduced or even avoided, and the situation that normal use of the cleaning device is affected due to the fact that impact generated when the sundries enter the containing groove is too large is avoided.

A system for detecting the presence of a wafer on a wafer handling robot. The system includes a robot having an end effector with a ledge portion having an opening; a vacuum pump; a conduit fluidly coupling the vacuum pump to the opening in the ledge portion; a pressure sensor located along the conduit to determine whether a measured pressure is within a target pressure range; and a wafer configured to be supported by the at least one end effector and spaced apart from the ledge portion by an air gap. When the wafer is supported by the at least one end effector in a proper position, the measured pressure is within the target pressure range. When the wafer is not supported by the wafer support structure or is supported by the wafer support structure in an improper position, the measured pressure is outside of the target pressure range.

The invention belongs to the technical field of data processing, and particularly relates to an intelligent analysis method and system for valve performance test data, and the method comprises the steps: constructing a dynamic sensitivity factor capable of reflecting the system stability through analyzing the change rate of a flow time sequence and the fluctuation of a current time sequence, and generating a fatigue factor in combination with a pressure range; further, an abnormal pressure peak value caused by the water hammer effect is identified and quantified, and a fatigue factor is corrected to obtain a degradation acceleration factor which can better reflect real physical wear; finally, the composite dynamic features and the traditional static features are jointly input into a GBDT model for training, so that early failure symptoms can be captured, and the accuracy and reliability of prediction of the remaining service life of the valve are improved.

In some embodiments, a pressure sensor may comprise a housing, a flexible membrane which, together with the housing, forms a hermetically closed cavity, a sensor element arranged in the hermetically closed cavity, and a gaseous medium in the hermetically closed cavity. The sensor may detect a change in a physical property, of the flexible membrane, associated with an external pressure pressing inward into the flexible membrane of the hermetically closed cavity.

The embodiment of the invention discloses a cover opening structure and a dust collecting method, and belongs to the field of cleaning devices. The dust collection base station comprises a base station body and an uncovering structure, a containing groove is formed in the end of the base station body, the uncovering structure is located on the side wall of the containing groove, and the uncovering structure is configured to trigger a dust discharging cover of a dust cup to be unlocked if air pressure in the containing groove is within a preset negative pressure range. Due to the fact that the air pressure in the containing groove is within the preset negative pressure range during unlocking, the air pressure difference between the interior of the dust cup and the interior of the containing groove is within the acceptable range, and impact generated when the dust discharging cover is opened under the action of the air pressure difference between the two sides is also within the acceptable range. The sundries in the dust cup enter the containing groove under the action of the air pressure difference in the dust cup and the containing groove, residues of the sundries in the dust cup are reduced or even avoided, and the situation that normal use of the cleaning device is affected due to the fact that impact generated when the sundries enter the containing groove is too large is avoided.

The invention discloses a self-calibration flexible pressure sensing device, which comprises a first conductor and a second conductor which are in a strip-shaped, strip-shaped or linear structure and both have a piezoresistive effect. The isolating layer is arranged between the first conductor and the second conductor, and through holes or long grooves with continuous through holes are distributed in the surface of the isolating layer; and an encapsulation layer covering the first conductor and the second conductor. According to the embodiment of the invention, a dual-core layer piezoresistive structure and a through hole type isolation layer design are adopted, the dual-core layer design covers a range from small pressure to large pressure, the range limitation of a single material is broken through, and a dynamic self-calibration technology is combined, so that multi-parameter integrated detection of pressure magnitude, position and width is realized; the sensor array has the advantages of self-adaption to environment change, wide-range detection, multi-scene applicability and the like, the sensor for realizing the functions only needs four wires, complex wiring of the sensor array is avoided, miniaturization and flexibility are facilitated, a narrow strip-shaped flexible structure is adopted as a whole, and flexible arrangement of sensor tracks and garment integration are facilitated.

The invention relates to a control method of auxiliary breathing equipment, a controller, equipment and a storage medium. The auxiliary breathing equipment comprises a first cavity, a second cavity, a pipeline assembly and a gas driving assembly. The method comprises the following steps: periodically acquiring detection information of intra-pulmonary pressure during the period of providing ventilation support by the auxiliary breathing equipment; in response to the fact that the detection information of the intra-pulmonary pressure exceeds a preset pressure range, pressure reduction operation or pressure increase operation is executed to adjust the intra-pulmonary pressure to be within the preset pressure range; the decompression operation comprises the steps that the pipeline assembly and the gas driving assembly are controlled, so that redundant gas in the lung is exhausted to the external environment through the second cavity in the process of maintaining partial gas circulation of the lung between the first cavity and the lung; the pressurization operation comprises the steps that the pipeline assembly and the gas driving assembly are controlled, so that gas of the breathing gas source is introduced into the lung through the first cavity in the process of maintaining partial gas circulation of the lung between the second cavity and the lung. The safety of ventilation support can be improved.

Methods for treating a subterranean formation with a treatment fluid comprise introducing the treatment fluid into a wellbore extending into a subterranean formation, measuring a surface treating pressure, changing a concentration of the friction reducer to have at least two surface treating pressure measurements within a surface treating pressure range, establishing a relationship between the surface treating pressure measurements and the concentrations of the friction reducer, evaluating a friction reducer efficiency, and selecting the friction reducer with the best efficiency for a next stage of a multistage fracturing job. The treatment fluid includes water, an acid, a corrosion inhibitor, and a friction reducer.

The invention relates to the technical field of communication, in particular to a volume adjustment method, device and equipment of a loudspeaker and a computer readable storage medium. The loudspeaker is arranged in the terminal, an internal cavity of the terminal is a rear cavity of the loudspeaker, and the method comprises the following steps: determining an air pressure value in the rear cavity when the loudspeaker plays an audio signal; when the air pressure value is in the preset interval, the system volume is increased, so that the air pressure value is larger than the maximum value of the preset interval; wherein the preset interval comprises a corresponding air pressure range when the target structure on the terminal resonates under the target volume. As the loudspeaker is provided with the open type rear cavity, the volume of the audio signal played by the loudspeaker can cause the vibration of the air in the rear cavity and can influence the air pressure value, and the air pressure value and the volume have a corresponding relation, when the air pressure is determined to be in the preset interval which is easy to cause resonance, the air pressure value can be increased by increasing the volume, and the resonance can be easily caused. And the shell vibration problem caused by the resonance phenomenon is avoided.

This invention belongs to the field of flexible sensor technology, and particularly relates to a multilayer porous flexible pressure sensing film and its preparation method. Addressing the problems of insufficient sensitivity and limited detection range in existing flexible pressure sensors, this application provides a multilayer porous flexible pressure sensing film. This film significantly improves the pressure sensing sensitivity of flexible pressure sensors, producing differentiated capacitance change responses under different pressures, achieving high-precision detection; it expands the detection pressure range, exhibiting good response linearity across the low-pressure to high-pressure range, enabling wide-range continuous monitoring; it shortens the sensor's response recovery time, improves dynamic response performance, and enhances signal cycle stability, meeting the application requirements of real-time dynamic monitoring.

The application discloses a high-efficiency grinding process for tin ore, which effectively separates coarse particles and makes them enter into sand by precisely controlling the pressure of a cyclone in a pressure range of 0.02-0.04 MPa, can effectively ensure that the content of +0.35 mm particles in overflow of the first-stage cyclone is strictly less than 5%, realizes the target of no coarse particles in the overflow, controls the ore concentration to be 30-40% at the same time, ensures the stable flow state of the ore slurry in the cyclone, makes the cyclone more accurately perform the grading operation, reduces the concentration of the sand in the first-stage cyclone, and ensures that the ore entering into the ball mill is basically +1 mm particle size ore through efficient screening, thereby reducing the over-grinding phenomenon of the ball mill, makes the material with a particle size of -0.074 mm particle grade stable between 50-55%, and the proportion of the material with a particle size of -0.01 mm particle grade is about 18%, thereby improving the tin recovery rate, and improving the economic benefit and resource utilization rate of the tin ore beneficiation.

According to the pressure control method and the servo pressure control system provided by the invention, through cooperative measurement of the small-range first pressure transmitter and the large-range second pressure transmitter, the defect of low precision of a single large-range pressure transmitter at a small pressure section can be solved; and the accuracy of small pressure measurement is improved while large pressure measurement is ensured. The corresponding control parameters are matched according to the preset pressure interval, the corresponding PID parameters can be matched according to different pressure ranges, and then the pressure control accuracy is improved.

The invention discloses a Eustachian tube blowing system which comprises a blowing device, a training APP device in data connection with the blowing device and a terminal device in data connection with the training APP device. A pressure sensing device, a pressure adjusting device and a display screen electrically connected with the pressure sensing device are arranged in the blowing equipment; the training APP equipment comprises a data receiving module, a data processing module, a training module and a storage module; the terminal device comprises a diagnosis module. The over-blowing device is used for conducting active blowing operation on a patient, the pressure adjusting structure adjusts the blowing pressure of the blowing device to the numerical value during ventilation, training is conducted multiple times according to the numerical value, the middle ear air pressure balance can be effectively recovered, and the rehabilitation effect is guaranteed; the training data is stored through the storage module, the training data generated last time can be directly used for adjusting the pressure range for training when the terminal equipment conducts air blowing operation again, and the training efficiency can be improved.

The application discloses a method for determining food type of an electric pressure cooker and related components, and relates to the technical field of home appliance control. First, a heating module is controlled to work at a first preset working power. When the pressure in the electric pressure cooker reaches a preset pressure range, the heating control module stops working and the number of pressure signal actions is increased by one, so that the food type is determined based on the number of pressure signal actions subsequently. When the working time of the electric pressure cooker does not reach a preset detection time, the heating module is continuously controlled to repeat the above steps until the working time reaches the preset detection time. The food type of the food to be cooked is determined by the number of pressure signal actions of the electric pressure cooker within the preset detection time, so that the cooking mode corresponding to the food type is adjusted, and problems such as cooking failure affecting the user experience are avoided.

The invention relates to the technical field of touch control, and discloses a touch control vibration feedback method, a vibration feedback system, computer equipment and a storage medium, detected touch control pressure is mapped to different preset pressure intervals in real time, and vibration feedback waveforms designed in a differentiated manner according to the output intensity, the frequency and even the duration time are correspondingly output. According to the technical scheme, the vibration prompt accurately matched with the force can be obtained through each touch, the touch sensing precision of a user on the change of the touch operation force is remarkably improved, the interaction level is enriched, the operation confirmation feeling is enhanced, and finally the immersion degree and efficiency of man-machine interaction are greatly improved.

The invention relates to a petroleum casing pipe buckling detection method and device, a storage medium and electronic equipment, and the device comprises an elevator which can suspend and fix a first petroleum casing pipe which extends out of a wellhead and penetrates through a wellhead platform in a lifting manner; the lower casing coupling is hooped at the top end of the first oil casing; the buckling device is clamped on the lower casing coupling in an open state, and is closed and tightly contacted with the lower casing coupling after being clamped on the lower casing coupling; the wireless sensor assembly is arranged on the buckling device and used for detecting buckling angle information and buckling pressure information between an upper casing joint and a first oil casing in the buckling process that the upper casing joint of a second oil casing is buckled to the first oil casing connected with the lower casing coupling in a hooping mode through the closed buckling device. And if the buckling angle information exceeds the buckling angle range and / or the buckling pressure information exceeds the buckling pressure range, sending buckling detection abnormal information to a preset terminal device. And the buckling precision and efficiency can be improved.

The disclosure herein pertains to a pressure regulation system for use in a silicon dominate anode lithium-ion cell. The pressure regulation system regulates a lifetime pressure on the lithium-ion cell in order to correct for capacity loss and mechanical failure due the expansion of silicon during operation. The pressure regulation system along with a housing maintains a certain pressure range on the lithium-ion cells during the cycling and the operational life of the energy storage device.

The invention relates to a low-temperature propellant temperature control method based on real-time pressure feedback of a storage tank on a rocket, which comprises the following steps of: acquiring a pressure value, a temperature value and flow of the storage tank in real time to determine whether the pressure value is within a set pressure range; the pressure value of the storage box is adjusted by executing control strategies such as adjusting the temperature set value, and the first set temperature is obtained; when the pressure value is within a set pressure range, determining an optimization target of the state prediction model, inputting the pressure value, the temperature value and the flow into the state prediction model, obtaining a target control variable and a second set temperature of the state prediction model when the optimization target is met, determining a target set temperature according to the first set temperature or the second set temperature, and performing state prediction according to the target set temperature. The target adjustment information including the target set temperature is obtained, and the temperature set value in the filling process is adjusted according to the target adjustment information, so that the low-temperature propellant is always in the optimal temperature state in the filling process, and the filling quality and efficiency are improved.

The present invention detects an abnormality in a flow path part of an inkjet head at an early stage. This inkjet recording device comprises: a pressure control part that controls the operation of a pressure adjustment part such that the pressure inside an inlet is gradually reduced while the difference between the pressure inside the inlet and the pressure inside an outlet is maintained constant; and a pressure determination part that determines whether or not an air bubble entrainment pressure, which is the pressure inside the inlet when the nozzle of an inkjet head starts to entrain air bubbles due to a meniscus break, is within the normal air bubble entrainment pressure range.

The invention relates to a method for pressure sensor diagnosis in a fuel tank ventilation system of a motor vehicle operated by an internal combustion engine, wherein the fuel tank ventilation system has an activated carbon filter, a flushing line arranged between the activated carbon filter and an air intake tract of the motor vehicle, a fuel tank ventilation valve arranged in the flushing line, and a pressure sensor arranged in the flushing line, and wherein the method comprises the following steps: - measuring a prevailing pressure in the flushing line by means of the pressure sensor to determine a starting pressure, - classifying the starting pressure to one of a plurality of pressure ranges depending on the amplitude of the starting pressure, - performing a pressure sensor diagnosis using a diagnosis algorithm assigned to the pressure range in which the starting pressure lies.

The invention relates to the technical field of energy storage, in particular to a compressed air energy storage overground and underground gas storage cooperative control method and device, and the method comprises the steps: collecting operation state parameters of a compressed air energy storage system; based on the operation state parameters, calculating a ratio value of the deflation flow of the overground gas storage and the deflation flow of the underground gas storage, and according to the ratio value, calculating a first adjusting opening degree of a flow adjusting valve of the overground gas storage and a second adjusting opening degree of a flow adjusting valve of the underground gas storage; and the opening degree of the corresponding flow adjusting valve is adjusted based on the first adjusting opening degree and the second adjusting opening degree, so that the inlet pressure of the turbine is maintained within the preset pressure range. Therefore, the problems of sudden pressure drop of a turbine inlet, large gas supply switching impact, poor operation stability and the like caused by independent and sequential gas discharging of the overground gas storage and the underground gas storage in the related technology are solved.

The application provides a control method and device of a gas charging and discharging equipment, a vehicle and a readable storage medium, and the method comprises the following steps: acquiring a current bearing pressure of the gas charging and discharging equipment; when the current bearing pressure of the gas charging and discharging equipment does not belong to an expected bearing pressure range, determining an expected bearing air pressure of a shell of the gas charging and discharging equipment according to the expected bearing pressure range, the current bearing pressure and an initial air pressure; and charging and discharging the gas charging and discharging equipment according to the expected bearing air pressure and the initial air pressure to adjust the current bearing pressure of the shell of the gas charging and discharging equipment, so that the adjusted current bearing pressure belongs to the expected bearing pressure range. By using the application, the air tightness and the gas supply efficiency of the gas charging and discharging equipment can be ensured, and the service life of the gas charging and discharging equipment can be prolonged.

The utility model relates to the technical field of capacitive screen production, in particular to a screen cover plate laminating device, which is used for laminating a screen substrate and a cover plate, and comprises a main body which is integrally plate-shaped and is sequentially provided with a first step groove, a second step groove and a third step groove which are gradually reduced along the thickness direction, a material notch penetrating through the main body in the thickness direction is formed in one side of the main body in the length direction; and the pushing assembly is arranged in the third stepped groove. The pressing assembly is located at the top of the main body. The cover plate and the screen substrate are contained in the first stepped groove and the second stepped groove, the pushing assembly enables the cover plate and the screen substrate to slightly exceed the first stepped groove after being placed, then the cover plate and the screen substrate are pressed and attached through the pressing assembly capable of being attached to the surface of the main body to slide in a reciprocating mode, overall operation is simple, and operation is convenient. And under the condition of ensuring accurate positioning, the laminating pressure at different positions is balanced and stable, the stable pressure application range is ensured, and the laminating efficiency and the laminating quality can be effectively improved.

The present application relates to the field of engineering machinery, and discloses a sand blasting rust removal device and a high-altitude rust removal equipment, the sand blasting rust removal device comprises a sand blasting mechanism, a moving mechanism, a force sensor and a controller, the sand blasting mechanism comprises a connecting support, a sliding seat, an elastic element and a sand blasting gun, the sliding seat is slidably arranged on the connecting support in a first direction, the elastic element is arranged to extend in the first direction and is connected between the connecting support and the sliding seat, and the sand blasting gun is arranged on the sliding seat, the moving mechanism comprises a first moving module, the first moving module is used for driving the connecting support to reciprocate in the first direction, the force sensor is used for detecting the pressure received by the elastic element, the controller is in communication connection with the force sensor, and is used for controlling the first moving module to drive the connecting support to move according to the pressure detected by the force sensor, so that the pressure received by the elastic element is kept within a preset pressure range. The present application is stable in the closed working space formed between the inside of the sand blasting gun and the working surface.

Systems and methods for perforating wellbores include comparing a signal from the least one pressure sensor with a preset pressure and, in response to determining that the signal from the least one pressure sensor is within a preset pressure range, transmitting the activation signal to a firing head.

The invention discloses a composite material forming device and method for stable-pressure resin injection and a product, the composite material forming device for stable-pressure resin injection comprises a press system, a resin injection system and a mold, and further comprises a mold cavity pressure dynamic adjusting system; the die cavity pressure dynamic adjusting system comprises a controller, a die cavity pressure sensor and a die position sensing device; the die cavity pressure sensor is used for monitoring the pressure in the die cavity in real time and feeding back a pressure value; the mold position sensing device is used for monitoring the height of a mold cavity of the mold in real time and feeding back a height value; the controller is used for receiving the pressure value and the height value; the controller is further in communication connection with the press system and controls the press system, when the pressure of the die cavity is larger than the preset standard pressure, a control instruction is output to the press system, the press system dynamically adjusts the position of the upper die and / or the lower die so as to adjust the height of the die cavity in real time, and therefore the pressure in the die cavity is stabilized within the preset target pressure range.

The invention relates to the technical field of pressure reducing valves, and discloses a novel pressure reducing valve with two-stage pressure regulating precision, which comprises a pressure regulating valve assembly, a first-stage cylinder assembly and a second-stage cylinder assembly are sequentially arranged on the right side of the pressure regulating valve assembly, the pressure reducing valve assembly comprises a valve body and a valve core, and an oil supply port P, a pressure outlet A and an oil drainage port T are respectively formed in the side wall of the valve body. A pressure sensor is arranged at the pressure outlet A; the first-stage air cylinder assembly comprises a first-stage cylinder body and a first-stage piston, the second-stage air cylinder assembly comprises a second-stage cylinder body and a second-stage piston, the valve element, the first-stage piston and the second-stage piston are sequentially connected and coaxially arranged, and air sources are introduced into the left side and the right side of the first-stage piston and the left side and the right side of the second-stage piston respectively to control the valve element to move leftwards and rightwards. The oil supply port P, the pressure outlet A and the oil drainage port T are switched to be connected and disconnected, and the stress balance state of the left side and the right side of the valve element is achieved. According to the invention, the pressure can be adjusted from 0ba, the maximum pressure adjustment range is applied to 20bar, and accurate pressure adjustment can be realized in a small pressure range.

This invention discloses a method and apparatus for correcting coefficients in blast furnace charge tank weighing calculations. By dividing the material into different weight groups and defining different furnace top pressure ranges based on the number of weight groups, the method of corresponding different furnace top pressures to different weight ranges is used to calibrate the charge tank weighing system online, correcting relevant parameters in the blast furnace charge tank weighing system. This solves the problems of drift, nonlinearity, and abrupt changes in the charge tank weighing system caused by various factors during the charging process in the prior art, enabling the charge tank weighing system to be dynamically calibrated online, thus achieving the technical effect of improving the accuracy of charge tank weighing data.

The application provides a design method of a light truck tire, relates to the technical field of tire design, and comprises the following steps: collecting the use environment data of the light truck tire, and generating the working parameter requirement of the light truck tire; then generating the contour data of the light truck tire; further generating the size data and preliminary material selection of each part structure of the light truck tire; finally generating a preliminary model; adjusting the preliminary model after simulation analysis to obtain a production model; selecting the tire pattern and the use air pressure range of the light truck tire based on the working parameter requirement of the light truck tire; adding the tire pattern and the use air pressure range of the light truck tire to the production model; producing a sample tire based on the production model, and detecting and verifying the design effect on site. Through the investigation on the use environment of the light truck tire, the accuracy of the working parameter requirement of the light truck tire is improved, through the comprehensive consideration of multiple factors such as the material, structure and pattern of the tire, and the mutual influence relationship among each part structure, the comprehensive improvement of the performance of the tire is realized.

The invention provides a rocket engine exhaust nozzle blanking cap which is characterized in that a pressure-bearing surface of the blanking cap is a spherical curved surface which is convex inwards and concave outwards, and reinforcing ribs which are radially and uniformly distributed are arranged on the concave surface; the thickness distribution of the pressure-bearing surface is in gradient change: the circle center area is thinnest and is gradually thickened towards the edge; the blanking cap is integrally formed through injection molding; the injection molding material is short carbon fiber reinforced polyether-ether-ketone and contains 10-30% by mass of short carbon fibers. Under the action of internal and external pressure difference of 0.2 + / -0.02 MPa, a bonding interface is free of debonding, the blanking cap is free of fracture or excessive deformation, excellent airtight and liquid-tight performance is shown, the blanking cap can be reliably fractured within the pressure range of 0.20-1.5 MPa, the number of generated fragments is 8-10, and the size is small.