711 results about "Pressure measurement" patented technology

The invention discloses a liquid cooling radiator cooling liquid leakage detection method and system, and relates to the technical field of equipment detection, and the method comprises the steps: obtaining the pressure reading of pressure measurement equipment; according to the pressure reading, the pressure change rate is calculated through differential operation; identifying a starting time point of a leakage event according to the pressure change rate; calculating an inherent response delay of the pressure measurement device; compensating the occurrence time sequence of the leakage event according to the inherent response delay to obtain a compensation time sequence; according to the starting time point and the compensation time sequence, the target leakage point position is determined, cooling liquid leakage detection is achieved, and accuracy is improved.

The utility model provides a guiding device and dilator for improving pressure measurement accuracy, the guiding device comprises a pressure measurement sheath, the pressure measurement sheath comprises a handle and a sheath tube, the size and shape of the sheath tube are suitable for entering a target area in a body through a body lumen, the sheath tube longitudinally extends from a near end to a far end, the sheath tube defines a first lumen suitable for entering of an external instrument, and the first lumen is communicated with the handle. A pressure measuring tube cavity longitudinally extending from the near end to the far end is formed in the tube wall of the sheath tube, a pressure measuring opening used for sensing the pressure of liquid in the body is formed in the far side of the pressure measuring tube cavity, and the dilator is arranged in the first tube cavity in a supporting and penetrating mode so that the pressure measuring sheath can enter the body conveniently. And the dilator is provided with a blocking part for limiting foreign matters from entering the pressure measuring tube cavity through the pressure measuring port.

The invention discloses a diaphragm valve flow test system and method, and the system comprises a first test assembly and a second test assembly, and a first pressure measurement port of the first test assembly and a second pressure measurement port of the second test assembly are respectively communicated with a to-be-tested valve; a first test pipeline communicated with the first test assembly is provided with a circulation path in a first direction; a second testing pipeline communicated with the second testing assembly is provided with a circulation path in the first direction. The upstream and downstream pressure values of the to-be-tested valve can be accurately detected through the first pressure gauge and the second pressure gauge, and the gas flow value is detected through the flow meter and substituted into a calculation formula to obtain an accurate flow coefficient value; the upstream first testing assembly and the downstream pressure measuring device are arranged at a specific distance according to the pipe diameter of the communicating pipeline, and the accuracy of the pressure value can be effectively ensured through the limitation of the pipe diameter and the distance; the actual temperature value of the fluid in the test system pipeline is monitored through the thermometer, and the influence of the temperature on the test result is effectively reduced.

The invention discloses a calibration test method and system for a pressure sensor, and relates to the technical field of pressure sensor calibration. According to the method, original temperature and voltage data are collected in real time, ideal pressure is obtained through an ideal state equation, original output voltage is obtained through a preset relation model in combination with the temperature, then precise compensation of zero drift and sensitivity drift is completed in sequence through a multi-dimensional calibration coefficient, and further correction is performed through a linear regression relation polynomial, so that the accuracy of the zero drift and the sensitivity drift is improved. And finally, a detection pressure value is obtained. The output pressure value is closer to the real physical quantity, the application requirements of high-precision scenes such as medical equipment are met, and the calibration effect and the pressure measurement precision are improved.

Disclosed herein are systems and methods to obtain representative formation pore pressure and formation mobility from pressure measurements with a formation testing tool. In some embodiments, the method includes performing a first pre-test in which a pressure sensor measures a drawdown pressure and a buildup pressure, calculating a statistical value for the measured buildup pressure, determining if the statistical value is above or below a threshold, shutting down a mud pulser if the statistical value is above or below the threshold, and performing a second pre-test in which the pressure sensor measures a second drawdown pressure and a second buildup pressure. In embodiments, the second pre-test includes a formation fluid drawdown flow rate that is different than a formation fluid drawdown flow rate in the first pre-test.

The invention discloses a measuring system and a measuring method of a fluorescence type optical fiber high-temperature pressure gauge. The measuring system comprises an optical fiber high-temperature pressure gauge, a demodulation host and a transmission optical cable, wherein the optical fiber high-temperature pressure gauge is used for collecting underground pressure and temperature; the demodulation host is used for outputting pulse pump light to the optical fiber high-temperature pressure gauge and receiving feedback signals; the demodulation host divides the signal into two identical paths, one path is transmitted to an underground optical fiber high-temperature pressure gauge, the other path is transmitted to the interference demodulation module and the temperature demodulation module, and a pressure value is obtained by simulating the change of the arm length difference between the interference optical cavity and the interference optical cavity of the optical fiber high-temperature pressure gauge; and a temperature value is obtained by comparing the fluorescence lifetime curve of the temperature demodulation module with the received fluorescence lifetime curve of the optical fiber high-temperature pressure gauge. According to the invention, temperature measurement and pressure measurement are simultaneously carried out in an underground high-temperature environment by using a fluorescence effect, and the stress surface of the optical fiber high-temperature pressure gauge under high pressure is directly used as a reflecting surface, so that the risk that an optical fiber grating is easy to fall off or break in the prior art is overcome.

Herein are described methods and systems for characterizing noise and noise level in pressure measurements in a downhole pressure testing operation in formation testing while drilling. The pressure measurements are acquired using a formation testing tool disposed on a drill string. The methods include drilling a borehole, extending the one or more probes into an inner surface of the borehole, performing a pressure testing operation with a first mud pump rate, wherein the pressure testing operation comprises a drawdown period and a build up period, decreasing the first mud pump rate to a second mud pump rate while measuring pressure during the build up period, decreasing the second mud pump rate to a third mud pump rate while measuring pressure during the build up period, and calculating a noise associated with pore pressure measurements during the first pressure testing operation.

The invention discloses a meter and valve integrated structure optimization and flow calculation method based on computational fluid mechanics, and belongs to the technical field of intelligent measurement and control valve simulation, and the optimization method comprises the following steps: S1, carrying out Boolean operation on a three-dimensional model of a typical opening degree of meter and valve integrated, and obtaining an accurate flow field model; s2, performing grid division on the accurate flow field model; s3, establishing a numerical model after grid division; s4, performing numerical calculation on the flow field model after mesh division by using a numerical model; s5, determining the position of a pressure measuring point according to a numerical calculation result, and obtaining a final optimization model of the meter-valve integrated structure. By adopting the method, the meter-valve integrated complex flow field structure can be captured at high precision, the flow field calculation precision is remarkably improved, rapid iterative optimization of the valve structure is supported, and pressure difference and flow data of the pressure measuring point can be accurately output. And an efficient and reliable numerical simulation means is provided for the optimization design of a meter and valve integrated structure, flow field regulation and control and flow characteristic analysis.

A wearable fluid delivery device (FDD) has a fluidic module and an electromechanical module. The fluidic module has a fluid path from a fluid reservoir to an outlet to a patient that is separate from the electromechanical module and its components that control the delivery of the fluid to the patient. A pump that can be disposed in the fluidic module, or in the electromechanical module and external to the fluid path. The FDD can have a releasably coupled first housing and second housing that enclose a respective one of the fluidic module and the electromechanical module. The first and second housings when connected have respective ones of aligned sensor opening and sensor access opening to create a sensor access area and permit a sensor to detect a pressure in the fluid path and thereby provide a pressure sensing system external to the fluid path.

The invention relates to the technical field of instrument and process measurement, in particular to a multi-range pressure gauge self-adaptive switching system and method based on time sequence feature perception, and the system comprises a data collection module which generates a smooth pressure time sequence signal in real time; the time sequence feature sensing module receives the smooth pressure time sequence signal and generates a pressure prediction trend signal of a future short-time window based on the pressure change trend feature; the self-adaptive decision-making module compares the pressure prediction trend signal with a preset current measuring range threshold value range; the switching execution module responds to the pre-switching trigger signal when the switching locking signal is in an unlocking state, and outputs the pre-switching trigger signal to the multi-range sensor group to complete switching of working channels; and the data fusion module performs weighted fusion processing on the two paths of output signals according to the switching process state signal provided by the switching execution module. According to the invention, the problem of switching lag of an existing pressure measurement system in the face of a pressure transient working condition can be solved.

The invention provides a device for simulating brine-sediment migration characteristics of a salt-cavern gas storage under the action of air pressure rise and fall and a test method. The simulation test device comprises a gas injection system, a simulation salt cavity, a gas production system, a brine discharge system, a temperature regulation and control system and a pore pressure measurement system. The gas injection system is connected with the simulated salt cavity through a gas injection pipe; the gas production system is connected with the simulated salt cavity through an exhaust pipe; the simulated salt cavity and the brine recovery device are connected through a simulated brine discharging pipe and a water discharging pipe; and the temperature regulation and control system and the pore pressure measurement system are connected with the simulated salt cavity through pipelines. The test device is reasonable in design, through an indoor simulation test, the brine and sediment migration rule under the free sinking condition, the sediment gap structure evolution rule under the self-weight compaction effect and the brine and sediment secondary migration rule under gas injection and production can be researched, and reference is provided for reasonable setting of injection and production operation parameters of the salt cavern gas storage.

The invention provides a five-hole probe correction method, which is used for correcting a five-hole probe in a cascade test, a left side pressure measurement hole of the corrected five-hole probe is a first hole, a central pressure measurement hole is a second hole, a right side pressure measurement hole is a third hole, a lower pressure measurement hole is a fourth hole, and an upper pressure measurement hole is a fifth hole. The correction method comprises the following steps: S1, acquiring a calibration curve of the five-hole probe, and acquiring total pressure distribution of a cascade outlet; s2, calculating to obtain a corrected pressure measurement value of the first hole and a corrected pressure measurement value of the third hole; s3, obtaining a corrected yaw angle and a corrected pitch angle by using the calibration curve; and S4, obtaining a corrected total pressure value and a corrected static pressure value by using the calibration curve. According to the invention, the problem of measurement distortion of angle measurement and pressure measurement of the probe calibration curve obtained under the condition of uniform incoming flow in wake measurement with non-uniform actual circumferential total pressure is solved, and the airflow angle in the wake of the cascade can be measured more accurately.

A control method and control apparatus for an electronic oil pump, applied to a vehicle. The control method comprises: after an engine of a vehicle is started, detecting whether a pressure measurement device has a fault; when the pressure measurement device does not have a fault, on the basis of real-time oil state parameters and real-time working condition parameters of the engine, determining a target requested rotation speed corresponding to an electronic oil pump, wherein the real-time oil state parameters at least comprise a real-time oil temperature and a real-time oil pressure, and the real-time working condition parameters at least comprise a real-time engine rotation speed and a real-time engine torque; and, on the basis of the target requested rotation speed, controlling the oil pump rotation speed of the electronic oil pump.

A method of monitoring a device that includes a soft pneumatic actuator and a gas pump, the soft pneumatic actuator configured to actuate, assist and / or resist a movement of a body part. The method includes measuring the pressure of a fluid in the internal chamber of the soft pneumatic actuator. The pressure measurement or measurements is / are used to estimate anyone or any combination of: the volume of the internal chamber; the three-dimensional position, shape, and / or displacement of the soft pneumatic actuator; and the force delivered by the soft pneumatic actuator.

The invention relates to a pressure gauge verification process management method and system in the technical field of data processing and artificial intelligence. The method comprises the following steps: firstly, acquiring an original pressure measurement signal, a real pressure value and a real space gradient value; thirdly, performing noise separation on the original pressure measurement signal, and extracting time-frequency domain mixed features based on a noise separation result; then, a pressure measurement signal verification and correction model is constructed, and the model comprises a double-flow feature extraction network, a feature interaction and fusion module, a physical constraint output module and a multi-scale residual error correction module; training a pressure measurement signal verification correction model based on the time-frequency domain mixed features, the real pressure value and the real space gradient value; and finally, carrying out noise separation and feature extraction on a to-be-corrected pressure measurement signal, and inputting the extracted features into the trained pressure measurement signal verification correction model to obtain a corrected pressure predicted value. And the accuracy and effectiveness of pressure gauge calibration are improved.

The invention belongs to the field of aerospace sensors, and discloses an intelligent wide-range pressure measurement system and method for an aero-engine. The system comprises a pressure acquisition module which comprises at least two pressure sensors with different measuring ranges and overlapped measuring intervals, and an electromagnetic valve group used for switching gas circuits of the pressure sensors; the intelligent control module communicates with an engine FADEC to obtain real-time working condition parameters, predicts the pressure change trend in combination with a pre-stored pneumatic model, switches gas circuits in advance before the pressure reaches a range critical point, triggers a special collection mode to lock an adaptive sensor under a transient working condition, and collects data at the highest sampling rate. The measurement method comprises the steps of working condition parameter acquisition, pressure trend prediction, advanced range switching and self-diagnosis calibration, and through multi-sensor data comparison under environment pressure or stable working conditions, temperature drift errors are dynamically compensated, and faults of the sensors and transmission pipelines are accurately diagnosed. According to the scheme, the problems of switching delay, data distortion, sensor precision drift and difficulty in fault discovery of a traditional system are effectively solved, high precision and stability of full-range pressure measurement are guaranteed, and reliable support is provided for precise regulation and control and flight safety of an aero-engine.

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.

A pressure measurement system includes a pressure pod with two chambers separated by a diaphragm such that a deformation / movement of the diaphragm is indicative of a difference between the pressures of the two chambers. Such deformation / movement is detected by a device that has no physical contact with the diaphragm, for example, by an optical detector that detects a change in the shape of the diaphragm or a movement of a protrusion on the diaphragm.

This invention provides a method and computer equipment for determining the dynamic reserves of condensate gas reservoirs, belonging to the field of oil and gas reservoir engineering. The method for determining the dynamic reserves of condensate gas reservoirs includes: acquiring a set of dynamic production data from well pressure measurement of the target condensate gas reservoir; converting the oil production data in the set of dynamic production data to obtain a total converted dynamic production data set of well pressure measurement; acquiring the pseudo-pressure of the target condensate gas reservoir under original conditions; selecting dynamic production data from well pressure measurement at multiple different pressure measurement time points that meet preset conditions to obtain a production indicator curve for the total converted cumulative gas production volume of the target condensate gas reservoir based on the pseudo-pressure; adjusting the production indicator curve for the total converted cumulative gas production volume of the target condensate gas reservoir to obtain an adjusted production indicator curve for the total converted cumulative gas production volume of the target condensate gas reservoir based on the adjusted production indicator curve for the total converted cumulative gas production volume of the target condensate gas reservoir; and calculating the dynamic reserves of the target condensate gas reservoir based on the adjusted production indicator curve for the total converted cumulative gas production volume of the target condensate gas reservoir.

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.

The utility model relates to the technical field of ceramsite sand product pressure detection, in particular to a ceramsite sand product pressure testing machine, which comprises a testing mechanism and is used for a ceramsite sand product pressure test, the testing mechanism comprises a main body assembly, the main body assembly comprises a vertical frame fixed at the top of a rack and cabins fixed at the two ends in the rack, and discharge ports are formed in the inner sides of the bottoms of the cabins; the detection assembly is arranged on the main body assembly and is used for pressure detection; the cleaning assembly comprises a cylinder seat which is slidably mounted at the outer end of the cabin in a penetrating manner, a connecting seat is fixed in the cylinder seat, a connecting rod is pivoted to the outer end of the connecting seat, a handle is fixed to the outer end of the connecting rod, a threaded cylinder sleeve is mounted outside the connecting rod in a threaded manner, a knob is fixed to the outer wall of the outer end of the threaded cylinder sleeve, and a push plate is fixed to the inner end of the cylinder seat; according to the testing machine, chippings are conveniently cleaned and stored through the foldable cleaning assembly, a hydraulic detection system is integrated to accurately measure pressure, a baffle and a limiting frame are matched to prevent chippings from splashing, and the testing machine has high detection efficiency and the space utilization rate.

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 pressure control method and device for a cavity of heat treatment equipment and related equipment, which are applied to the technical field of control. The method is applied to control equipment which is respectively connected with a vacuum pump and a pressure measuring device of a heat treatment equipment cavity. The control equipment obtains the actual pressure value of the cavity of the heat treatment equipment and determines the pressure deviation value. The pressure deviation value is used for measuring the difference between the cavity set pressure value and the actual pressure value of the cavity of the heat treatment equipment. And the control equipment determines the pump speed of the vacuum pump in positive correlation with the sub-value range according to the sub-value range to which the pressure deviation value belongs. In this way, the pump speed of the vacuum pump matched with the pressure deviation values of the different value ranges can be determined, adaptive pressure control of different stages of pressure control is achieved, and the requirements for the pressure change speed and stability of the cavity are met. The control device controls the vacuum pump to suck gas in the cavity of the heat treatment device through the vacuum pump speed, and the control effect of controlling the cavity pressure through the vacuum pump is improved.

The invention relates to a disposable adapter by means of which pressure measuring devices (2) can be attached to pressure ports (31, 31') of process systems (3) under sterile conditions. For this purpose, the disposable adapter (1) comprises the following components: a separating membrane (11) elastic within the intended pressure measuring range, with a collar (111) circumferentially extending around its edge; and a connector (12) which encloses the separating membrane (11) at the collar (111), by means of which the pressure measuring device (2) can be attached to the adapter (1), and with a connection means (121) via which the adapter (12) can be connected to the pressure port (31) in such a way that the separating membrane (11) provides a media-tight separation between the process system (3) and the pressure measuring device (2).

1. The name of the design product: sensor (quincunx contact). 2. The use of the design product: applied to the clamping pressure measurement of various high-voltage quincunx contacts (circular binding type or circular pressing type) in high-voltage switch circuit breakers and other primary conduction equipment. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The application discloses a liquid cooling radiator coolant leakage detection method and system, and relates to the technical field of equipment detection. The method comprises the following steps: acquiring a pressure reading of a pressure measuring device; calculating a pressure change rate by using a difference operation according to the pressure reading; identifying a starting time point of a leakage event according to the pressure change rate; calculating an inherent response delay of the pressure measuring device; compensating the occurrence timing of the leakage event according to the inherent response delay to obtain a compensated timing; and determining a target leakage point position according to the starting time point and the compensated timing. The application realizes coolant leakage detection and improves accuracy.

The utility model relates to a pressure measuring diaphragm capsule protecting and cleaning device which comprises a top cover and a base, clamping grooves are formed in the bottom of the top cover at equal intervals, clamping strips are fixedly connected to the top of the base at equal intervals, the clamping strips are used in cooperation with the clamping grooves, and the base is located on the outer side of a measuring diaphragm capsule. The device has the beneficial effects that a disposable film can be quickly fixed above the measuring diaphragm capsule, the influence of the external environment on the measuring diaphragm capsule is reduced, and the risk that the measuring diaphragm capsule is damaged or the measuring precision is reduced due to factors such as accidental collision or dust is reduced.

The application discloses a hydraulic weighing system for heavy-load vehicles at high-speed intersections, and belongs to the technical field of heavy-load transportation, which comprises a plurality of pits evenly spaced along the longitudinal direction of a road, a road panel arranged at the opening of the pit, an oil cylinder corresponding to the road panel arranged in the pit, a middle partition plate of the oil cylinder separating the inner side of the oil cylinder into an upper oil cylinder groove and a lower storage groove, a piston fixed at the bottom of the road panel and slidingly arranged in the oil cylinder groove, and an oil bag arranged between the piston and the middle partition plate; a pressure measuring instrument is installed in the storage groove, and the output end of the pressure measuring instrument is connected to the oil bag; the pressure measuring instrument can convert the current actual axle load according to the pressure change amount, and the weighing data information of each road panel is returned to a central control computer, and the computer outputs the size of each axle load and the axle spacing. The application can be used for accurately calculating the total weight of vehicles and goods, and can also consider more detailed load factors such as the axle load and the wheelbase.

A pressure measuring cell for measuring pressure, having: - a pressure measuring cell (500); - a rotationally symmetrical sensor cannula (400), into which the pressure measuring cell (500) is inserted; - a rotationally symmetrical process connection (300), wherein one end (370) of the process connection (300) has an inwardly extending, encircling stop surface (310) intended for the sensor cannula, and the other end (380) of the process connection (300) has an opening (330) for receiving the sensor cannula; - a ring-like process seal (600), which continues in an annular, radial ring and exerts a sealing action in a sealing plane between the sensor cannula (400) and the stop surface (310) of the process connection (300), in order thus to prevent process medium from entering into the pressure measuring cell (100); - wherein the stop surface (310) of the process connection (300) and / or a counter stop surface (432) of the sensor cannula (400), which in the installed state is oriented towards the stop surface, have a plurality of individually formed web plates (435), which are configured in a manner dependent on the characteristics of the process seal such that the process seal cannot be pressed into the opening.

The invention discloses an on-line radiation monitoring and power-off protection MEMS pressure sensor and a preparation method thereof. The sensor can synchronously realize pressure measurement, radiation monitoring and power-off protection functions on a single chip. On the basis of realizing high-precision pressure measurement, the sensor is provided with a platinum film resistor in a specific area and is coated with an electromagnetic wave absorbing material to form a radiation sensing unit, so that the on-line monitoring on the electromagnetic radiation intensity of the environment is realized. The protection circuit closely integrated with the sensor continuously analyzes radiation dose signals, and once it is judged that the dose exceeds a preset safety threshold value, a control signal is generated, a power supply access of the pressure measurement unit is actively cut off, the pressure measurement unit is made to enter a dormant state, and therefore irreversible performance degradation or permanent damage is avoided. According to the invention, the conversion from passive bearing to active protection during the working of the sensor is realized, and the reliability of long-term working in an extreme electromagnetic environment is obviously improved.