1251 results about "Pressure measurement" patented technology

The invention provides an intelligent pressure sensor temperature compensation system, and relates to the technical field of pressure sensors, and the system comprises a hardware sensing module which comprises an elastic sensitive element and is used for reducing the temperature drift magnitude of a pressure sensor; the environment data acquisition module comprises a flexible thermoelectric sensor array and is used for acquiring temperature and humidity data; the humidity correction module is used for integrating a dynamic humidity correction algorithm and establishing a cross-sensitive matrix model to correct the original signal to generate a first pressure correction signal; the temperature compensation module is used for carrying an incremental neural compensation network and constructing a compensation model to perform temperature compensation on the first pressure correction signal to generate a second pressure compensation signal; and the fault compensation module is used for triggering a digital twinborn compensation model to perform fault compensation on the second pressure compensation signal to generate a target pressure output signal when a fault of the single sensor is monitored, so that the pressure measurement error in the whole temperature range can be accurately controlled, and the environmental adaptability and the intelligent level of the system are improved.

The invention discloses a carbon dioxide booster pump control system and method, particularly relates to the technical field of carbon dioxide booster pump control, and aims at transient interference pulses caused by starting and stopping of a pump body in the batch production process, millisecond-level timestamp mapping is adopted to achieve interference and steady-state pulse separation. Performing sliding median filtering on the steady-state pulse, extracting a window center peak value, and performing incremental accumulation in sequence to obtain operation accumulated flow in real time; based on the last peak time label, synchronously collecting temperature and pressure measurement values, generating a correction amount through a predefined temperature correction function and a user-defined pressure correction function, adding the correction amount according to a fixed weight, and converting the correction amount into a compensation pulse count through pulse-volume conversion to correct an accumulated error; high-precision flow metering and compensation are achieved through the synergistic effect of start-stop interference elimination, filtering peak value extraction and a correction function, and the reliability of a carbon dioxide booster pump control system under the complex working condition is improved.

The embodiment of the invention provides a pipeline blockage monitoring method and system for wet metallurgy slurry conveying, and belongs to the technical field of pressure measurement and pipeline blockage monitoring. The method comprises the following steps: collecting multi-point pressure signals along a slurry pipeline, and extracting pressure pulsation amplitudes and phase characteristics in a pump fundamental frequency and frequency multiplication range based on the multi-point pressure signals so as to establish an on-way pulsation transmission sequence; determining equivalent on-way impedance based on comparison between the on-way pulse transmission sequence and a reference working condition, and outputting an initial judgment result for representing a blockage risk; flow temperature and viscosity estimation parameters are introduced based on the initial judgment result to carry out rheological correction on an impedance threshold value, and a high-frequency phase difference is extracted at an elbow section to update a candidate blockage position; and based on the updated candidate blockage position and the corrected impedance threshold, fusing a phase stability index, and generating and outputting a current blockage evaluation result. According to the scheme, early-stage accurate positioning and stable judgment of slurry pipeline blockage can be achieved under complex working conditions.

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 belongs to the technical field of sensors, and particularly discloses a capacitive sensor based on multistage compression deformation and a preparation method thereof, the capacitive sensor comprises an upper electrode layer and a lower electrode layer; a deformable corrugated structure is arranged between the upper electrode layer and the lower electrode layer, and the deformable corrugated structure comprises three deformation areas with the same structure; the deformation area is internally provided with three cavities, and the three cavities are filled with a first dielectric layer, a second dielectric layer and a third dielectric layer respectively; magnetic adsorption units are arranged on the outer sides of the adjacent deformation areas. According to the capacitive sensor based on multi-stage compression deformation and the preparation method thereof, the sensor realizes wide-range and multi-resolution pressure measurement capability; the sensor can present different sensitivity characteristics in different pressure ranges, can flexibly switch working modes, meets various measurement requirements from low pressure to ultrahigh pressure, and solves the technical problem that a traditional capacitive sensor is difficult to consider wide range and high resolution at the same time.

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 relates to the technical field of sensor measurement, and discloses a bimodal sensor based on a single unit and a measurement method thereof.The sensor comprises a flexible upper substrate used for providing flexible supporting and packaging protection for the upper surface of the whole sensor, an upper electrode layer comprising a first circular electrode and used for forming capacitance change to respond to pressure stimulation, and a lower electrode layer comprising a second circular electrode and used for forming capacitance change to respond to pressure stimulation; the upper electrode layer is arranged on the flexible lower substrate and serves as a leading-out end of an electric signal; the method comprises the steps of system initialization, bimodal signal synchronous acquisition and transmission, signal processing and signal output and display. According to the invention, through the cooperation of the concentric circle electrode design and the independent signal channel, the hardware decoupling of temperature and pressure signals is realized, the problem that the traditional sensor interferes with pressure measurement and depends on algorithm compensation due to temperature drift caused by sharing the same electrode and signal channel is solved, and the accuracy and reliability of bimodal measurement are fundamentally improved.

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.

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 discloses a space grid method for interconversion of geodetic height and barometric height, and belongs to the technical field of aviation navigation and geographic information systems. According to the method, the mutual conversion of geodetic height and barometric height is realized through establishing a global space-time grid reference system, establishing a space-time grid data base, converting barometric height to geodetic height, inversely converting the geodetic height to the barometric height, and carrying out reference conversion, data fusion and grid compression between the barometric heights. According to the method, the vertical availability of the height estimation value obtained through air pressure measurement within the height range within the stratosphere can be improved, the method is suitable for most weather conditions, the height estimation value with the precision reaching the ten-meter level can be achieved, and compared with an existing ISA-based method, the precision is higher, the application range is wider, and the application range is wider. The method can effectively improve the reliability of flight control systems of various aircrafts, and has wide application prospects in urban air traffic operation.

The invention belongs to the field of embedded atmosphere data system fault identification and elimination calculation, and particularly relates to a flying wing aircraft seven-pressure-measuring-point embedded atmosphere data system fault identification and calculation method, which comprises the following steps: step 1, pressure measuring points are grouped: each group of pressure measuring points comprises nose cone lower surface pressure measuring points, left and right symmetrical pressure measuring points and upper and lower symmetrical pressure measuring points, the pressure measuring points are used for solving the attack angle alpha and the sideslip angle beta, one pressure measuring point is reused, the pressure measuring points are divided into four groups under different attack angles, and each group of pressure measuring points is composed of four pressure measuring points; step 2, identifying the fault type of the pressure measuring point and the fault point: according to the attack angles alpha 1, alpha 2, alpha 3 and alpha 4, the sideslip angles beta 1, beta 2, beta 3 and beta 4 obtained by resolving the four groups of pressure measuring points under different attack angles, and the pressure measuring point used for resolving the attack angle alpha and the sideslip angle beta, identifying the fault type of the pressure measuring point, and further identifying the fault point; and step 3, removing fault points, and calculating and outputting atmospheric parameters including an attack angle alpha and a sideslip angle beta.

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 dust collector base station dust accumulation detection method and device, a terminal and a storage medium, and the method comprises the steps: monitoring the internal pressure of a dust collector base station in real time, obtaining an internal pressure value, and comparing the internal pressure value with a preset pressure threshold value to obtain a pressure measurement result when an air draft motor in the dust collector base station operates; when the pressure measurement result is abnormal, acquiring dust data in the dust collection bag through a dust collector base station dust detection sensor and analyzing the dust data; constructing a dust fullness evaluation formula according to the dust data, and judging whether the dust in the dust collection bag reaches a dust fullness standard or not according to the dust fullness evaluation formula; if the dust reaches the dust fullness standard, a dust fullness signal is sent to a prompt mechanism of the dust collector base station, and the prompt mechanism gives out a dust fullness warning. The dust accumulation condition in the dust collection bag can be accurately judged, the air draft motor is prevented from being damaged by dust accumulation, and the accuracy of dust fullness detection is improved.

To provide a liquid level detection system for detecting the liquid level in a container, in which the liquid level in the container such as a water storage tank can be more widely detected compared to conventional techniques and can be applied to multiple containers.SOLUTION: A liquid level detection system for detecting the liquid level in a container comprises a vent pipe, gas supply means, pressure measurement means, and a solenoid valve.SELECTED DRAWING: Figure 1

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.

Disclosed are systems and methods to determine barometric pressure 1) using multiple low-cost pressure sensors located at known heights instead of a single high-cost sensor; 2) determines an actual pressure value—not by averaging multiple sensors but rather optimizing an expected error in each individual one of them and utilize their known sensor heights thereby defining a new error function; 3) our approach is scalable, i.e. the number of sensors can be increased, and multiple sensors can be grouped together into smaller cells such that each group of cell can be corrected separately, and can even be corrected among themselves. Finally, our systems and methods according to the present disclosure can advantageously be integrated with a distributed fiber optic sensing (DFOS) system via acoustic modems thereby providing extremely wide-area external, or interior buildings pressure readings.

The application provides a self-adaptive eccentricity compensation and sensitivity enhancement type pressure ring sensor and a loading and unloading measurement model construction method thereof.The sensor comprises an upper force transmission unit, a lower force transmission unit and a measurement elastic body unit.The sensor adopts a spherical surface contact structure design, can automatically adjust and compensate the load eccentricity caused by the uneven contact between the contact planes, and reduces the influence of the eccentricity on the measurement results.The established sensor loading and unloading measurement model can accurately monitor the bolt fastening force in real time.The deformation of the measurement elastic body unit of the sensor is measured by using a fiber grating, and the sensor has the advantages of high precision and good reliability.In addition, the pressure measurement result of the sensor is irrelevant to the friction coefficient of the contact surface between the sensor and the nut and the structure, and the measurement precision of the sensor in actual application is further improved.The self-adaptive eccentricity compensation and sensitivity enhancement type pressure ring sensor has the advantages of small size, large range, high precision, automatic correction, good reliability and the like.

An airflow sensor system for an air duct including a damper positioned therein is provided. The controller is configured to determine, via a first pressure sensor, a first airflow measurement based on a first one or more pressure measurements. The controller is further configured to determine, via a second pressure sensor and a damper position sensor, a second airflow measurement based on a second one or more pressure measurements and one or more damper position measurements. The first airflow measurement and the second airflow measurement have a first uncertainty value and a second uncertainty value associated therewith. The controller is further configured to determine an estimated airflow based on weighted values of the first airflow measurement and the second airflow measurement. The weighted values are based on the airflow measurements and the uncertainty values associate therewith.

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.

The invention relates to the technical field of petroleum engineering, in particular to a system and method for improving the yield of a horizontal well of a low-permeability oilfield, and the system comprises a permeability distribution characteristic data acquisition unit, an oil well test data acquisition unit, a numerical simulation unit, a calculation unit, an optimization unit and a control unit. Permeability data, pressure measurement data and production dynamic data are collected, numerical modeling is conducted in a non-equilibrium state seepage simulation mode, and pressure distribution in the horizontal shaft streamline direction and in the horizontal shaft streamline direction is calculated. And the optimization unit performs coupling calculation according to the flow characteristic data and the single well characteristic data of the horizontal well to obtain an optimization scheme. And the control unit feeds the optimization scheme back to the underground data acquisition unit so as to adjust liquid injection measures in the horizontal shaft, optimize flow characteristics and improve the yield of the horizontal well. The method breaks through the limitation of a traditional equilibrium state model, the complex flow characteristics of the fluid in the low-permeability oil field can be described more accurately, and the simulation precision is improved.

The present invention provides a compensation method for a silicon resonant pressure sensor, which relates to the technical field of pressure measurement and includes: collecting the frequency signal timing output by the silicon resonant pressure sensor and analyzing to obtain the real-time pressure value; obtaining a predetermined compensation item, collecting multi-dimensional compensation features, and obtaining multi-dimensional compensation information; traversing and screening a historical compensation database with the multi-dimensional compensation information as a screening constraint to obtain a target sensor; normalizing and comparing the pressure value deviation obtained from the detected pressure value of the target sensor and a preset pressure value to obtain a multi-dimensional compensation coefficient; performing compensation adjustment to obtain an effective pressure value. The present invention solves the technical problem that most of the existing compensation methods only adjust for a single influencing factor, ignoring the comprehensive influence of multi-dimensional factors, resulting in the inability to effectively cope with multiple error sources under complex environmental conditions, and further leading to insufficient accuracy and reliability of the silicon resonant pressure sensor.

The present invention discloses a method for measuring the surface pressure of a vane pump blade based on rotational non-contact wireless pressure measurement, and a vane pump surface pressure measurement device based on the method. The method comprises the following steps: selecting a profile line on the blade surface for setting the blade height; determining multiple installation positions with the same axial plane angle within the profile line; providing multiple assembly slots corresponding to the multiple installation positions; and installing multiple pressure sensors in the multiple assembly slots in a one-to-one correspondence. The method for measuring the surface pressure of a vane pump blade based on rotational non-contact wireless pressure measurement according to the embodiment of the present invention can measure the pressure on the blade surface while the blade is rotating.

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 provides a pressure measurement method and device, electronic equipment and a storage medium. The method comprises the following steps: dynamically sampling online service traffic to obtain sampled traffic data; constructing a user behavior model based on the sampling flow data; according to the user behavior model, dynamically mixing real playback traffic and simulated enhanced traffic, and generating target pressure measurement traffic; and injecting the target pressure measurement flow into a test system to execute a pressure test. According to the invention, real service flow data is obtained through dynamic sampling, so that the distortion problem of fixed scripts and random sampling is solved; constructing a user behavior model based on the sampling data to restore user operation path features; the real playback flow and the simulated enhanced flow are dynamically mixed according to the model, so that the authenticity of the service logic is maintained, and directional pressurization can be performed for a key path; and finally, through injection of the target pressure measurement flow, performance verification in a specific service scene is realized. Therefore, the problem that a traditional method cannot give consideration to both test authenticity and target pressure verification is solved.

The utility model provides a ventilating duct wind pressure measuring device, and relates to the technical field of wind pressure measurement, the ventilating duct wind pressure measuring device comprises a housing and an installation assembly, one side of the housing is provided with a cable, one side of the housing is provided with a display screen, one side of the housing is provided with a measuring rod, one side of the housing is provided with a take-up device through the installation assembly, and the other side of the housing is provided with a wind pressure sensor. The take-up device comprises a placing plate, one side of the placing plate is in threaded connection with a threaded rod, one side of the threaded rod is rotatably connected with a fixing plate, one side of the placing plate is fixedly connected with a take-up rod, one side of the threaded rod is fixedly connected with an operation block, and one side of the operation block is fixedly connected with a plurality of anti-skid blocks. According to the wind pressure measuring device, by using the take-up device, the cable can be stored and fixed, and the situation that the cable is easily entangled together when wind pressure measurement is finished and the wind pressure sensor is stored is avoided, so that the use effect of the wind pressure measuring device can be improved.

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 utility model relates to the technical field of pipeline sealing performance detection, and discloses a sealing performance detection device for pressure pipeline design, which comprises an air-entrapping pressure measurement assembly, the air-entrapping pressure measurement assembly comprises an air-entrapping pipe, one end of the air-entrapping pipe is connected with a three-way pipe, and one end of the three-way pipe is connected with an air pressure measurement device. The outer side of the air adding pipe is fixedly sleeved with a blocking air bag, and the other end of the three-way pipe is connected with an air distributing assembly. The plugging air bag is inserted into the to-be-detected pipeline, the air inflation device is connected with the air pipe quick connector, air inflation is switched through the three-way valve, the plugging air bag is expanded to be attached to the inner wall of the pipeline, plugging is completed, then the three-way valve is switched to the full-closed state, pipeline ports are plugged one by one, and finally the interior of the pipeline is inflated to the specified pressure. The device is simple and flexible in overall operation, is suitable for pipelines with different diameters, and has the advantages of being wide in application range and convenient to use.