604 results about "Pressure range" patented technology

The invention relates to the technical field of state monitoring, in particular to an energy-saving air compressor running state monitoring system and method, and the system comprises a pressure slope analysis module, a deviation trend judgment module, an error fitting acquisition module, an error trend analysis module and an alarm triggering module. According to the method, a pressure range is calculated by dividing time slices, a slope ratio is generated, a dynamic threshold algorithm is combined to successively compare and capture an offset trend, frequency and current waveform data are synchronously acquired to match a timestamp to calculate a difference value, an error vector is generated in a standardized manner, and a periodic mean value is extracted to verify an incremental relationship to identify progressive anomaly. The cross validation slope ratio and error vector positioning wear or coordination abnormity, the dynamic threshold value is adjusted along with the mean value coefficient at the initial period to reduce fluctuation interference, the timestamp matching enhances the composite fault detection capability, and the range division operation quantifies the matching degree to provide an energy efficiency optimization basis. And a standardized error vector and mean value incremental mechanism improves the prediction precision and reduces false alarm and missing alarm.

The invention discloses a reinforcing method for long-term automatic grouting repair of fractured rock mass.The reinforcing method comprises the steps that a pressure sensor is arranged at the tail end of a grouting opening, and data of the pressure sensor are obtained through an intelligent control system; when the intelligent control system monitors that pressure difference is generated due to pressure unbalance caused by surrounding rock fracture development, the intelligent control system sets grouting parameters and starts a grouting program; in the grouting process, pressure balance between equipment and surrounding rock is maintained through a pressure adjusting module, and it is ensured that grout is stably conveyed within the set pressure range all the time in the conveying process after a grouting program is started; grouting pressure and flow are controlled in the grouting process; in the grouting process, the bacterial liquid and the cementing liquid are input in a separated conveying and on-site gathering mode; and accumulated liquid in the pipeline is rapidly removed after grouting is finished. By adopting the method, cracks can be continuously monitored and periodically repaired, and the manual intervention requirement is reduced. The modular design is convenient for maintenance and replacement of equipment, and the maintenance cost is reduced.

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 discloses an automatic switching metering method suitable for multiple ranges of a pressure gauge, and the method comprises the steps: S1, obtaining the information of a current pressure measurement environment, inputting a pressure range prediction model, and outputting an initial recommended range; s2, selecting a measurement parameter of a corresponding measuring range, and performing preliminary measurement on the pressure at the initial sampling frequency to obtain a preliminary measurement pressure value; s3, comparing the preliminarily measured pressure value with the upper range limit and the lower range limit of the selected range, and judging that a higher / lower range needs to be switched; s4, the calibration coefficient of the range to be switched is obtained and corrected, and a corrected pressure measurement value is obtained; s5, dynamically adjusting the sampling frequency; and S6, the pressure change rate is monitored in real time, and the measuring range capable of covering the current pressure change range is preferentially selected for measurement. According to the invention, multi-range intelligent switching of the pressure gauge is realized, and the measurement precision and response speed in the full-range range are improved.

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 utility model provides a controlled atmosphere fresh-keeping storehouse pressure balance valve which comprises a communicating piece and a breather valve connected to the end portion of the communicating piece, the breather valve is located on the outer side of a controlled atmosphere fresh-keeping storehouse, and the breather valve is communicated with the inner space of the controlled atmosphere fresh-keeping storehouse through the communicating piece. According to the pressure balance valve, the inner space of the controlled atmosphere fresh-keeping storehouse is communicated with the breather valve located outside the controlled atmosphere fresh-keeping storehouse through the communicating piece, and the breather valve ensures that the controlled atmosphere fresh-keeping storehouse is isolated from the atmosphere within a certain pressure range and can be communicated with the atmosphere when the pressure exceeds or is lower than the pressure range; therefore, loss of cold air in the air-conditioned fresh-keeping storehouse is reduced while it is guaranteed that the cold storage door of the air-conditioned fresh-keeping storehouse is easy to open, when the pressure balance valve of the air-conditioned fresh-keeping storehouse is arranged, only the communicating piece needs to penetrate through the wall body of the air-conditioned fresh-keeping storehouse to enable the inner space of the air-conditioned fresh-keeping storehouse to be communicated with the breather valve, and the arrangement cost is reduced.

The present invention relates to the technical field of hydrogen nozzles, and in particular to a hydrogen nozzle, the technical solution of which includes a nozzle body, a throat, a compression spring screw and a plug, the nozzle body being a hollow cylindrical structure, and an air inlet being provided at the top of the nozzle body, a tip seat being fixedly mounted at the bottom of the nozzle body, a C-shaped hole being provided on one side of the interior of the nozzle body, and a flow channel being provided at a position away from the hole in the interior of the nozzle body. The present invention installs a slider inside the nozzle body, and adjusts the position of the slider by the combined force of the elastic force applied to the slider by a spring and the pressure applied by hydrogen entering the nozzle body, thereby causing the slider to block the flow channel to varying degrees, thereby adjusting the flow velocity of hydrogen inside the nozzle body, thereby achieving the purpose of adjusting the internal pressure of the hydrogen nozzle, and enabling hydrogen to maintain a relatively stable pressure range during transportation, thereby avoiding damage to the equipment caused by large pressure fluctuations.

The invention provides a fuel cell system and a start-up control method and device thereof.The start-up control method of the fuel cell system comprises the steps that when a system start-up instruction is received, the pressure of the cathode side in an electric pile is obtained; comparing the acquired pressure of the cathode side with a preset pressure range; when the obtained pressure of the cathode side is not within the preset pressure range, an exhaust control valve on an air exhaust pipeline connected with the cathode side is opened; when the obtained pressure of the cathode side is within the preset pressure range, the exhaust control valve is closed; and after the exhaust control valve is closed, controlling the fuel cell system to start according to a preset starting process. The start-up control method of the fuel cell system is beneficial to reducing the failure rate of the fuel cell system during start-up and prolonging the service life of the fuel cell system, and has good practicability.

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 present invention relates to the technical field of medical gas equipment, and in particular to a method and system for regulating the operating pressure of medical gas equipment. The method comprises: dividing a day into a number of regulation cycles T; obtaining the rated gas production Q of the air compressor within the regulation cycle T, the terminal predicted total gas consumption (a%*Q), the gas storage tank volume V, the air compressor exhaust pressure P0, and the air compressor exhaust and gas storage tank gas temperature coefficient K, and establishing the start-stop number n and the minimum operating pressure P min and the maximum operating pressure P max Establish the objective function MinW and use the optimization algorithm to obtain the optimal value of the objective function MinW P min and P max , set the operating pressure range of the air storage tank within the current adjustment period T. The beneficial technical effects of the present invention include: reducing the operating energy consumption of the air compressor and saving energy by selecting a reasonable and effective operating mode.

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 invention discloses a product inner cavity pressurizing sealing method and a sealing structure, and the method comprises the following steps: S1, arranging a connecting boss on a shell of a product, welding one end of a guide pipe on the connecting boss, and enabling the guide pipe to be communicated with the product inner cavity; s2, the other end of the guide pipe is sequentially connected with a pressure controller and a pressure air source through an air path; s3, air in the inner cavity of the product is pumped out through the pressure controller, and then the pressure air source is controlled by the pressure controller to charge the inner cavity of the product with pressurized air until the inner cavity of the product reaches the required pressure; s4, the preset section of the guide pipe is subjected to extrusion forming to form a flat structure, and resistance spot welding is conducted at the position of the flat structure through a resistance welding machine till a welding sealing structure is formed; s5, the part, except for the resistance spot welding sealing part, of the guide pipe is cut off, and a cut opening is ground; according to the scheme, the applicable compensation pressure range is larger, and the control precision is higher; and meanwhile, stable pressurizing and sealing welding in a low-vacuum-section pressure range can be achieved through resistance spot welding.

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.