441 results about "Ionization chamber" patented technology

The invention discloses an ionization chamber internal electric field modeling and radioactive interference suppression method. The method comprises the following steps: modeling by adopting a multi-physical simulation software package to obtain a geometric model of an ionization chamber; analyzing electric field distribution in the ionization chamber through finite element analysis software, and simulating a plurality of parameters by adopting a particle physical experiment simulation program to set a drift trajectory and a drift end point of secondary electrons so as to obtain ionization chamber parameters meeting conditions; and optimizing the ionization gas chamber according to the ionization gas chamber parameters meeting the conditions, and monitoring and outputting particle drift and current induction results based on the optimized ionization gas chamber. The radiation interference caused by the detector can be shielded on the basis of the original functions of the traditional ionization gas chamber, and the background emissivity of the alpha particle measuring device is reduced, so that the detection efficiency and accuracy of low-level radioactive measurement are improved.

The invention provides a data acquisition method and device based on combination of an XAFS and ATR-SEIRAS. The device comprises an in-situ pool, an infrared test system and an XAFS test system, the infrared test system is used for acquiring ATR-SEIRAS data of a sample to be tested, and the infrared test system comprises an infrared light source and an infrared light detector; the XAFS testing system is used for acquiring XAFS data of a sample to be tested, the XAFS testing system comprises an X-ray light source, a front ionization chamber and an X-ray fluorescence detector, and the front ionization chamber is used for measuring the intensity of incident X rays. According to the data acquisition method and device based on combination of the XAFS and the ATR-SEIRAS, ATR-SEIRAS data of the to-be-tested sample is obtained based on the infrared test system, XAFS data of the to-be-tested sample is obtained based on the XAFS test system, dynamic association between the surface interface active structure evolution law of the to-be-tested sample and the physical and chemical behaviors of a reaction intermediate under the reaction condition can be achieved, and the data acquisition accuracy is improved. Therefore, the structure-activity mechanism of the reduction process of the electro-catalysis # imgabs0 # is accurately disclosed.

The invention relates to the technical field of radiation monitoring, in particular to a radioactive foam height nuclear monitoring system and a use method. A radioactive foam height nuclear monitoring system comprises an ionization chamber detector; the collimation shielding module is provided with a containing space, the ionization chamber detector is contained in the containing space, the collimation shielding module is provided with a collimation hole, and particles generated by the self-radiation source can pass through the collimation hole. The invention provides a radioactive foam height nuclear monitoring system and a use method, and aims to solve the problem that a conventional radiation detector is difficult to bear an extremely high radiation environment and affects the detection precision.

The present invention proposes a sputtering cleaning system and cleaning method for the inner wall of the ionization chamber of a radio frequency ion thruster. The system is composed of a gas distributor, a potential control line, a radio frequency coil, an ionization chamber, a screen grid, an acceleration grid, a positive DC voltage source, a radio frequency power supply, a negative DC voltage source and a conductive tape. The method includes: 1. The radio frequency ion thruster is started, and plasma is formed in the ionization chamber; 2. A positive voltage is applied to the screen grid, and ions are drawn out by the grid system, and the thruster enters a working state; 3. When the conductive film is thicker and the power input is weakened, the positive DC power supply is turned off, and no ions are drawn out of the thruster; 4. The negative DC power supply is turned on, and a negative voltage is slowly applied to the potential control line to increase the energy of ions hitting the inner wall of the ionization chamber; 5. The conductive film on the inner wall of the ionization chamber is bombarded by ions, and particles are sputtered out. The particles are neutral and are discharged from the ionization chamber under the action of the neutral particle flow, thereby achieving cleaning of the inner wall of the ionization chamber.

The invention provides an automatic beam debugging method of a proton treatment system. The method comprises the following steps: fixedly mounting external measurement equipment of a beam on a treatment head; a processor of the automatic debugging work station starts to execute a beam automatic beam adjusting program, and beam adjusting target parameters are set; the accelerator loads the automatic loading parameters and the irradiation scheme for irradiation; the ionization chamber and external measurement equipment are used for measuring the performance parameters of the beam current and sending the performance parameters to the automatic debugging work station; and if the angle is within the required threshold range, storing the parameters and debugging the next rack angle, otherwise, adjusting the magnet parameters and sending the adjusted magnet parameters and the irradiation scheme to the accelerator for next iteration. The invention further provides an automatic beam debugging system of the proton treatment system. According to the invention, efficient and automatic debugging of the beam current under different rack rotation angles is realized, the efficiency of the proton treatment system in initial debugging and daily maintenance is remarkably improved, and the method has important significance in guaranteeing the clinical treatment effect.

The embodiment of the invention provides a delayed neutron monitor calibration device and calibration method, and a delayed neutron monitor calibration device. The first beam intensity detection device comprises a penetration type ionization chamber, the penetration type ionization chamber is arranged between the delayed neutron calibration source and the accelerator along the emission direction of the beam, and the penetration type ionization chamber is arranged close to an emission port of the accelerator, so that the beam passes through the penetration type ionization chamber; the second beam intensity detection device comprises a finger-type ionization chamber, the finger-type ionization chamber is arranged between the delayed neutron calibration source and the accelerator in the beam emitting direction, the finger-type ionization chamber is arranged close to the first channel, and the finger-type ionization chamber can move in the first direction. According to the delayed neutron monitor calibration device provided by the embodiment of the invention, accurate calibration of the delayed neutron calibration source in the beam field can be realized, the stability and efficiency of beam irradiation are improved, and the calibration precision of the delayed neutron monitor is further improved.

The invention relates to a low-pressure ionization chamber, a design method and a medical linear accelerator, and belongs to the technical field of radiotherapy dose monitoring, the low-pressure ionization chamber comprises a shell, a closed cavity is formed in the shell, a low-pressure environment lower than standard atmospheric pressure is formed in the closed cavity, and the ion recombination ratio of positive and negative charges is not larger than 0.01; according to the invention, the technical problem in the prior art that the monitoring result is inaccurate under the ultrahigh dose rate due to the influence of ion recombination on the penetration type air ionization chamber can be solved.

A miniature sensitive structure of a photoionization gas sensor belongs to the technical field of sensor manufacturing. The problems that a sensitive structure of a photoionization gas sensor is large in size and high in power consumption are solved. An ultraviolet light source cavity is a rectangular cavity with an opening in the upper side, the rectangular cavity is filled with working gas, the upper end opening is embedded in the bottom face of a micro ionization chamber, and a transparent baffle is further arranged between the upper end opening and the bottom face of the micro ionization chamber; exciting electrodes are attached to two opposite side walls of the ultraviolet light source cavity; the bottom surface and the top surface of the micro ionization chamber are electrode plates distributed with through holes; the micro ionization chamber is filled with gas to be detected; the gas to be detected is decomposed under the ionization of ultraviolet light to generate micro current, and the micro current is transmitted out through the electrode plate. The invention is suitable for serving as a sensitive structure of the sensor.

The invention relates to the technical field of ionization radiation detection, in particular to an ionization chamber detection device, a measurement system and a use method. An ionization chamber detection device comprises: a housing having an accommodation space in which a mixed reaction gas is accommodated; the at least one separating polar plate is arranged in the accommodating space, and the separating polar plate is used for separating the accommodating space into at least two sections of detection cavities; the at least two signal collecting polar plates are respectively arranged in different detection chambers; and the at least two signal transmission lines are respectively connected with different signal collecting polar plates, one end of each signal transmission line is connected with the signal collecting polar plate, and the other end of each signal transmission line extends out of the shell and is suitable for being connected with a data collecting and processing unit. The invention provides an ionization chamber detection device, a measurement system and a use method, and aims to solve the problem that a conventional ionization chamber is generally used for intensity and dose measurement of regional radiation and is not suitable for position sensitive detection of a space smaller than the sensitive volume of the ionization chamber.

The invention provides an ionization chamber with an adjustable polar plate distance and an adjusting method, and the ionization chamber comprises a housing which is provided with a through hole for a beam to pass through; the collector is fixed in the shell; the high-voltage electrode and the collector are arranged at an interval; the spacer ring is connected with the collector, and the spacer ring is located between the collector and the high-voltage electrode; the adjusting assembly comprises a lead screw, the lead screw is connected with the high-voltage electrode, the lead screw is rotatably arranged relative to the adjusting assembly, and the high-voltage electrode is driven to move by rotating the lead screw, so that the distance between the collector and the high-voltage electrode is adjusted. According to the ionization chamber with the adjustable polar plate distance and the adjusting method, the technical problem that the monitoring result of the radiotherapy dose rate is inaccurate due to the influence of ion recombination in the ionization chamber in the related technology is solved.

A method, a system, and a device for determining a target detection region of an ionization chamber, and storage medium. The method includes obtaining an image comprising a target region of a to-be-scanned object acquired by an image collector; identifying the target region based on the image; obtaining a first position of the ionization chamber in a spatial coordinate system; obtaining a selectable detection region of the ionization chamber based on the first position; determining the target detection region of the ionization chamber according to the target region and the selectable detection region, so that the target detection region is within the target region.

The invention discloses a dual-mode precise regulation and control method and device for a proton treatment system, and relates to the technical field of proton treatment, and the device comprises a superconducting cyclotron, a beam transmission module, a treatment head module which comprises a first ionization chamber, a second ionization chamber, a range regulator, a multi-leaf grating and scanning iron, a treatment chair and a control module, the control module is used for receiving and analyzing a treatment plan and controlling the working states of the superconducting cyclotron, the beam transmission module, the treatment head module and the treatment chair in different working modes according to the treatment plan; the working mode comprises a first working mode and a second working mode, and the radiation dose of a proton beam required by the second working mode is far greater than the radiation dose of the proton beam required by the first working mode. The dual-mode precise regulation and control device can support a conventional working mode and also can support a flash therapy working mode, and different working modes can be switched to realize a treatment plan.

The utility model relates to the technical field of organic matter detection, in particular to an online photoionization detector system for measuring volatile organic compounds, which comprises a gas circuit module, an ionization module, a signal amplification module, a data storage module and a power supply module. The gas path module is used for collecting and guiding gas and realizing real-time monitoring of gas flow, gas path temperature and humidity; the ionization module can efficiently ionize to-be-detected gas, an ionization chamber in the ionization module can efficiently capture gas ions and electrons, interference of environmental condition changes on signals is reduced, and generated current signals and the concentration of the to-be-detected gas are in a linear relation; the signal amplification module amplifies the generated current and converts the current into a voltage signal, and the amplification efficiency can reach 109 times; the data storage module records and stores the voltage signal to realize online data visualization; the power supply module provides working voltage for the detector system. The system is high in integration degree, strong in stability and high in sensitivity, and the detection limit is superior to 0.5 ppbv.

The low-pressure ionization chamber comprises a closed chamber, a low-pressure environment lower than the standard atmospheric pressure is formed in the closed chamber, and an electrode plate assembly is arranged in the closed chamber to collect electron-ion pairs in the closed chamber in the low-pressure environment; by arranging the negative-pressure closed chamber, the air density is reduced under the condition of low air pressure, so that the number of gas molecules in unit volume is reduced, the total number of charges generated by radiation ionization of a gas medium is reduced, and then the charge density and the ion recombination probability are reduced, so that the saturation characteristic of the ionization chamber is influenced.

The utility model relates to the field of building safety, in particular to a building fire alarm device which comprises a base, a shell and a protective cover, a controller is installed at the bottom of the base, a photoelectric sensor is installed on one side of the front face of the controller, and a networking module is installed on the other side of the front face of the controller; the base is provided with a photoelectric sensor and a controller, the front surface of the controller is provided with an ion type sensor, the bottom of the base is provided with an ionization chamber through the controller, the ionization chamber is covered with a shell, and the bottom of the shell is provided with a protective cover. The detection sensitivity and accuracy are improved, the false alarm rate is reduced, the built-in networking module supports multiple communication protocols, butt joint with various fire control systems and safety management systems is facilitated, remote monitoring and instant alarm are achieved, and the fire prevention and control efficiency and response speed are improved.

The embodiment of the utility model provides a multi-diaphragm switching device for monitoring an ionization chamber. The multi-diaphragm switching device comprises a fixed frame, a movable frame and a driving device, the fixed frame is of a hollow rectangular block structure with a transmission hole in the middle, the movable frame comprises an upper connecting block and a lower movable frame body, the movable frame body comprises a connecting plate and two diaphragm mounting plates which are parallel in the front-back direction, the diaphragm mounting plates are located on the outer sides of the front plate face and the rear plate face of the fixed frame respectively, and the movable frame can move left and right along the fixed frame; a plurality of diaphragm mounting holes are formed in the diaphragm mounting plate in the left-right direction, and a diaphragm is arranged in each diaphragm mounting hole; the execution end of the driving device is connected with the upper connecting block. According to the technical scheme, the multiple sets of diaphragms are configured for monitoring the ionization chamber, and the diaphragms needing to be configured can be put into the preset working positions through the translation action of the driving device, so that automatic switching of the diaphragms is realized, the labor intensity is reduced, and the working efficiency is improved.

The invention discloses an electron collection type residual gas ionization chamber structure without magnetic field constraint, which belongs to the field of nuclear science and technology and comprises an upper polar plate, a lower polar plate, a shimming polar plate and a signal collection device. By setting the potentials of the inlet electrode and the lower electrode plate of the signal collection device, a guide electric field capable of focusing signal electrons is formed to limit profile diffusion caused by the initial momentum of the signal electrons, so that the measurement profile can truly reflect the initial distribution information of incident particles, and the overall size of the residual gas ionization chamber can be reduced. The method has important significance on compact design of the electron collection type residual gas ionization chamber.

The invention discloses a remote plasma generator, comprising: an ionization cavity, each of which is provided with an air cavity and two cooling water channels, and each of the two cooling water channels is provided with a water inlet and a water outlet; a heat dissipation device, comprising a heat sink, a water inlet pipe, a first water outlet pipe, a second water outlet pipe and a water return pipe, a water sink flow channel, a water inlet and a water outlet are provided in the heat sink, and the heat sink is provided with two heat sinks, namely, a first heat sink and a second heat sink, the water inlet pipe is connected to the water inlet of the heat sink, the first water outlet pipe is connected to the water outlet of the first heat sink and the water inlet of one cooling water channel; the second water outlet pipe is connected to the water outlet of the second heat sink and the water inlet of another cooling water channel; the water return pipe is connected to the water outlet of the two cooling water channels. The remote plasma generator uses an external heat dissipation device to cooperate with the cooling water channel in the ionization cavity, and the heat is exchanged synchronously inside and outside, thereby improving the heat dissipation efficiency, and at the same time extending the service life of the cavity and the sealing component, thereby improving the production efficiency.

The invention relates to the field of plasma technology, and discloses a cascade arc plasma generator, which comprises a cathode structure, a cascade structure and an anode structure connected in sequence. When the cascade arc plasma generator is working, a working gas to be ionized enters an ionization chamber through an air inlet channel, a potential difference exists between a plurality of arc starting needles and an anode body, the plurality of arc starting needles all break down the working gas, the working gas is ionized, and plasma is formed, and is ejected to the outside of the cascade arc plasma generator through the ionization chamber, the plasma channel and the anode channel connected in sequence, enters an external device, and interacts with a material sample. The plurality of arc starting needles are parallel to each other and arranged at intervals, and the needle tips are all located in the same plane to form a planar plasma source, which can irradiate a large area of ​​material samples or irradiate a plurality of material samples at one time, and the arrangement of the plurality of arc starting needles can also be changed to be suitable for material samples of different shapes, so as to improve the irradiation efficiency.

Disclosed is a calibrator device designed to measure the activity of a radio element, including: an ionization chamber, intended to receive the radio element; and electronic / computer system for controlling the operation of the calibrator device. The electronic / computer system includes voice control, which include: at least one microphone capable of capturing a voice instruction emitted by the operator; a recognition module designed to convert the voice instruction into a request that can be executed by the electronic / computer system; and a control module designed to control the execution of the request by the electronic / computer system.

The present application discloses a detection method, a surface density device, a detection apparatus, and a storage medium. The surface density device includes a radiation source and an ionization chamber disposed at an interval from the radiation source. The detection method includes: during the operation of the surface density device, obtaining a first current pose of the radiation source and a second current pose of the ionization chamber; confirming a first pose deviation of the radiation source according to the first current pose; confirming a second pose deviation of the ionization chamber according to the second current pose; and determining whether a pose change occurs between the radiation source and the ionization chamber according to the first pose deviation and the second pose deviation. In the detection method according to the embodiments of the present application, the current poses of the radiation source and the ionization chamber are first obtained respectively, and then it is confirmed whether a pose change occurs between the radiation source and the ionization chamber according to the current poses, so that corresponding measures can be taken when a pose change occurs between the radiation source and the ionization chamber, thereby improving the accuracy of the measurement result of the surface density device.

The invention discloses a charged particle identification method and system based on a screen grid ionization chamber signal waveform, and belongs to the technical field of radiation detection. The charged particle identification method comprises the following steps: acquiring a current signal waveform generated by charged particles at an anode of a screen grid ionization chamber and extracting a characteristic quantity; analyzing the relationship between the obtained characteristic quantity and the particle energy and incident angle, and constructing particle identification parameters; according to a relation between particle energy and a range, drawing by using related identification parameters, and determining distribution characteristics of different particles; and identifying different particles according to different distribution characteristics. According to the method, the energy deposition characteristics of the particles are utilized, and the constructed identification parameters weaken the influence of the incident angle of the particles on particle identification, so that the five particles of p, D, T, 3He and 4He can be accurately identified in a relatively large angle range, and the section measurement efficiency is improved.

The present invention relates to a spacecraft electric thruster particularly suitable for both propellant-fed and air-breathing electric space propulsion comprising an ionization chamber (11) for plasma generation which develops along a central development axis (X), wherein the ionization chamber (11) has a chamber inlet (12) configured to allow gas inflow and a chamber outlet (13) configured to allow extraction of ionized gas particles; a power injection assembly (30) configured to perform electron heating for plasma generation inside the ionization chamber (11); a magnetic assembly (20) configured to generate a magnetic field for plasma confinement in the ionization chamber (11); and an ion extraction and acceleration assembly (40) configured to extract ionized gas particles from the ionization chamber (11) through the chamber outlet (13) and accelerate them along an ion acceleration direction (Z), wherein the power injection assembly (30) comprises a microwave power delivery system (31) configured to deliver an electric field oscillating at a selected microwave frequency (f) and to inject the generated oscillating electric field in the ionization chamber (11), and wherein the ionization chamber (11) comprises a plurality of walls (11a, 15,16,41) closed to the passage of microwaves apart from a portion of at least one lateral wall (11a) of the plurality of walls (11a, 15,16,41) at which the power delivery system (31) is coupled to inject the generated oscillating electric field in the ionization chamber (11), and is resonant for electromagnetic fields oscillating at the selected microwave frequency.

The utility model provides a photoionization gas sensor and a portable photoionization gas detector, the photoionization gas sensor is characterized in that an upper gas chamber cover, an electrode circuit board, a lower gas chamber cover, a switching circuit board and an ultraviolet lampshade are fixedly connected through conductive bolts to form a closed cavity, and the ultraviolet lampshade is fixedly connected with an ionization chamber; meanwhile, the conductive bolts can serve as wires to be connected with a collecting electrode on the electrode circuit board and the control circuit board, so that the space is saved, and the electrical connection is more stable; the control circuit board is electrically connected with the conductive bolt and the ultraviolet lamp control panel by using the FPC flexible flat cable, so that the complexity of electrical connection is further reduced; meanwhile, the gas passage is arranged from top to bottom, so that the space of the ionization chamber can be utilized to the maximum extent, the irradiation area is increased while the ultraviolet lamp is prevented from irradiating the collecting electrode, the gas reaction is more sufficient, and the detection efficiency is further improved.

The invention relates to a method for testing the tritium release rate of a tritium-containing waste package, and the method comprises the steps: guiding tritium-containing waste gas released by the tritium-containing waste package in an exhaust hood to be continuously input into an ionization chamber online monitoring system, and determining the initial tritium activity concentration; when the first threshold value is lower than the first threshold value, the tritium-containing waste gas flows into an initial bubbling sampler after passing through a refrigerating system to collect tritiated water, and target gas is obtained; enabling the target gas to circularly pass through the operation of the initial bubbling sampler, and replacing a new bubbling sampler every time a first preset time is reached; after a second preset time is reached, stopping the cyclic operation, and testing the target tritium activity concentration of liquid in the bubbling sampler which is replaced for multiple times and the current bubbling sampler by adopting a liquid scintillation counter; and calculating the tritium release rate based on the target tritium activity concentration. Target gas is discharged into the exhaust hood again, tritiated water absorption is carried out on tritium-containing waste gas multiple times, and the technical effects that tritiated water absorption is more complete due to multiple times of cyclic absorption, and the tritium release rate detection result is more accurate are achieved.

The invention relates to a method for adjusting parameter data of a nuclear instrumentation system, and the method comprises the steps: obtaining the parameter data of a power range before modification, the parameter data of the power range to be modified, and the current data of an ionization chamber actually measured by a nuclear instrumentation, and the parameter data of the power range before modification at least comprise a nuclear power coefficient Gk0 corrected before modification; calculating a nuclear power value before modification and an instantaneous nuclear power value to be modified; calculating a first nuclear power deviation; determining a relationship between the first nuclear power deviation and a preset nuclear power deviation; if the nuclear power value is within the preset nuclear power deviation, calculating a first group of intermediate parameter data according to the nuclear power value before modification, the instantaneous nuclear power value to be modified and the parameter data to be modified of the power range; through the first group of intermediate parameter data, it can be prevented that due to parameter modification, short-time nuclear power indication deviation is too large, and unnecessary power change rate fast alarm is triggered.

The low-pressure ionization chamber comprises a closed chamber, a low-pressure environment lower than the standard atmospheric pressure is formed in the closed chamber, and an electrode plate assembly is arranged in the closed chamber to collect electron-ion pairs in the closed chamber in the low-pressure environment; by arranging the negative-pressure closed chamber, the air density is reduced under the condition of low air pressure, so that the number of gas molecules in unit volume is reduced, the total number of charges generated by radiation ionization of a gas medium is reduced, and then the charge density and the ion recombination probability are reduced, so that the saturation characteristic of the ionization chamber is influenced.

The invention discloses an X-ray measurement light spot collimation system, which relates to the field of X-ray collimation and comprises an X-ray source, a transmitting end collimator, a receiving end collimator and a ray detector, when the collimation system works, firstly, after a ray cone beam emitted by an X-ray source passes through a transmitting end collimator with a funnel-shaped window cross section, X-rays are collimated for the first time, so that a light spot on a sample to be detected is in a required shape; secondly, after the rays pass through the sample to be detected, the rays pass through a receiving end collimator with a trapezoidal window cross section, and scattered rays are shielded; and finally, enabling the collimated ray beam to reach an X-ray detector, and obtaining the final ray intensity. According to the invention, the size and the shape of a light spot measured by the system can be controlled, the spatial resolution of system measurement is ensured, the influence of scattered rays is reduced, the collimated ray main beam is ensured to be received by the ionization chamber as far as possible after passing through the pole piece to the greatest extent, the ray utilization rate is improved, and the measurement precision is improved.

The present invention relates to an ion mobility spectrometer, which at least has a first drift chamber and a first switchable ion gate for controllably transferring ions into the first drift chamber, wherein: the first ion gate is designed as a field-switching ion gate having at least a first counter electrode and a first injection electrode; wherein, a first ionization chamber is formed between the first counter electrode and the first injection electrode, and ions to be analyzed by ion mobility spectrometry can be fed from an ionization source into the first ionization chamber. The present invention also relates to an ion mobility spectrometer, which at least has a first drift chamber and a first switchable ion gate for controllably transferring ions into the first drift chamber, as well as a second drift chamber separated from the first drift chamber and a second switchable ion gate for controllably transferring ions into the second drift chamber. The present invention also relates to a method for analyzing a sample by ion mobility spectrometry using an ion mobility spectrometer, such as an ion mobility spectrometer of the aforementioned type, wherein, by means of an ionization source, ions to be analyzed are generated from the sample and provided in the ionization chamber of the ion mobility spectrometer.

The utility model relates to the technical field of micropore aperture measurement and metering, and discloses a testing device for measuring the aperture of an ultra-small micropore, which comprises a sealed box body, a measuring space for measuring the aperture of the ultra-small micropore is arranged in the sealed box body, and a vertically arranged partition plate is arranged in the measuring space. The partition plate divides the measuring space into a positive ionization chamber and a negative ionization chamber, a clamp used for clamping a measured object is arranged in the middle of the partition plate, and the positive ionization chamber and the negative ionization chamber are located on the two sides of the measured object respectively and apply positive and negative charges to the measured object. The two sides of the sealed box body are respectively provided with an electric wire extending to the corresponding positive ionization chamber and negative ionization chamber, and the electric wires are electrically connected with a charge sensor used for measuring the directional flow charge quantity of the measured object. According to the utility model, an accurate and reliable measurement result can be obtained for an ultra-microporous object to be measured, and important data support is provided for the aspects of medicine packaging material sealing positive samples, material performance evaluation, filtering effect optimization and the like.