Measurement method for testing aperture of ultra-small micropore

Abstract

The invention relates to the technical field of micropore aperture measurement and metering, and discloses a method for measuring the aperture of an ultra-small micropore, which comprises the following steps of: 1, setting a positive ionization chamber and a negative ionization chamber, and filling the positive ionization chamber and the negative ionization chamber with a conducting medium, so that the micropore of a measured object is communicated with the positive ionization chamber and the negative ionization chamber; step 2, respectively inputting positive charges into the positive ionization chamber and negative charges into the negative ionization chamber, and enabling the conducting medium in the micropore of the measured object to directionally move to form micro current; and step 3, through a charge sensor electrically connected with the positive ionization chamber and the negative ionization chamber, obtaining the quantity of charges in the micropores of the measured object through the micro-current information, and obtaining the pore diameter of the micropores of the measured object according to the quantity of charges through a pore diameter comparison method. According to the invention, an accurate and reliable measurement result can be obtained for an ultramicropore measured object, and important data support is provided for the aspects of a medicine packing material sealing positive sample, material performance evaluation, filtering effect optimization and the like.

Description

Technical Field

[0001] The invention relates to the technical field of micropore diameter measurement and metrology, and in particular to a measurement method for testing ultra-small micropore diameters. Background Art

[0002] Micropore size measurement is a common technology in the fields of materials science, biology, medicine, and preparation of positive samples for drug packaging seal integrity. By accurately measuring the micropore size, the performance, filtration effect, adsorption capacity, etc. of the material can be analyzed and evaluated. Commonly used micropore size measurement methods include microscopy, mercury intrusion, and medium flow method.

[0003] Among them, the microscope method is a simple and intuitive method for measuring micropore diameter. By placing the sample under a microscope, the structure and morphology of the micropore surface can be directly seen. The microscope method can only observe the surface pore diameter. It is impossible to measure the micropore diameter for objects with long pore channels or deep channels that are opaque. At the same time, micropores below 2µm cannot be measured.

[0004] Meanwhile, mercury intrusion method: is a method that applies pressure to make mercury enter the interior of microporous materials, and then calculates the pore size based on the amount of mercury intrusion. Mercury intrusion method can measure a wide range of pore sizes, and can simultaneously measure parameters such as pore depth and pore morphology. However, mercury intrusion method requires the use of a large amount of mercury and takes a long time to measure, which may not be suitable for small samples and precise testing requirements.

[0005] In addition, the medium flow method uses a vacuum pump or air compressor to create a pressure difference or concentration difference at both ends of the leak sample, so that the medium flows from the air inlet to the outlet of the leak to generate a leak rate. The factors affecting the leak rate include the type of medium, the inlet pressure, the outlet pressure, and the temperature of the medium. The medium flow method cannot measure ultra-micropores due to interference from the test environment and limitations of the flow meter.

[0006] Therefore, in summary, there is an urgent need for a measurement method that can measure ultra-micropores for testing the pore size of ultra-small micropores, which can obtain accurate and reliable measurement results and provide important data support for positive samples of drug packaging sealing, material performance evaluation, and filtration effect optimization. Summary of the invention

[0007] The present invention aims to provide a measurement method for testing the pore size of ultra-small micropores, which can measure ultra-micropores and obtain accurate and reliable measurement results, providing important data support for positive samples of drug packaging sealing, material performance evaluation, and filtration effect optimization.

[0008] In order to achieve the above object, the present invention adopts the following technical scheme: 1) A measurement method for testing the aperture of ultra-small micropores, comprising the following steps: Step 1: setting a positive ionization chamber and a negative ionization chamber, and filling the positive ionization chamber and the negative ionization chamber with a conductive medium, wherein a clamping space for placing and fixing the object to be measured is provided between the positive ionization chamber and the negative ionization chamber, so that the micropores of the object to be measured are connected to the positive ionization chamber and the negative ionization chamber; Step 2: inputting high voltage into the positive ionization chamber and the negative ionization chamber respectively, so that the conductive medium in the positive ionization chamber and the negative ionization chamber is in an ionized state, and the conductive medium in the micropores of the object to be measured moves in a directional manner to form a microcurrent; Step three, using a charge sensor electrically connected to the positive ionization chamber and the negative ionization chamber to detect the microcurrent information in the micropores of the object to be measured, and using the microcurrent information to obtain the charge amount in the micropores of the object to be measured, and using the charge amount to obtain the micropore diameter of the object to be measured by the aperture comparison method.

[0009] Through the above technical solution, when the positive ionization chamber and the negative ionization chamber are at high voltage, a directional microcurrent is formed in the object to be measured, and the charge generated by the microcurrent is transported to the charge sensor by the wires on both sides of the sealed cavity. The charge sensor directly measures the charge amount of the electric field of the object to be measured, and the pore size of the object to be measured is obtained through the charge amount of the object to be measured. Accurate and reliable measurement results can be obtained for objects with ultra-micropores, providing important data support for positive samples of pharmaceutical packaging sealing, material performance evaluation, and filtration effect optimization.

[0010] 2) The method for measuring the aperture of ultra-small micropores according to 1), wherein: In step one, the positive ionization chamber and the negative ionization chamber are jointly arranged in a sealed box, and a vertically arranged partition plate is provided in the clamping space between the positive ionization chamber and the negative ionization chamber. The partition plate is located in the middle position of the sealed box and separates the positive ionization chamber from the negative ionization chamber. A clamp for clamping the object to be measured is provided in the middle position of the partition plate. The positive ionization chamber and the negative ionization chamber are respectively located on both sides of the object to be measured and apply positive and negative charges to the object to be measured.

[0011] Through the above technical scheme, a sealed box is used to form a sealed environment for the positive ionization chamber and the negative ionization chamber respectively. Under the electric field environment, the positive ionization chamber and the negative ionization chamber are in a high voltage state, and the object to be measured is fixed on the partition plate by a clamp. The partition plate is made of insulating material, and the two ends of the object to be measured are respectively located in the positive ionization chamber and the negative ionization chamber, thereby stabilizing the object to be measured and ensuring the accuracy of the charge amount in the micropores of the object to be measured.

[0012] 3) The method for measuring the aperture of ultra-small micropores according to 1), wherein: In step 2, positive charge is input into the positive ionization chamber using a positive power supply arranged on the side wall of the sealed box, and the positive power supply is used to transport positive charge into the positive ionization chamber. Negative charge is input into the negative ionization chamber using a negative power supply arranged on the side wall of the sealed box, and the negative power supply is used to transport negative charge into the negative ionization chamber.

[0013] According to the above technical solution, the positive power supply is used to supply positive power to the positive ionization chamber, so that the medium in the positive ionization chamber is in an ionized state under a high voltage state; the negative power supply is used to supply negative power to the negative ionization chamber, so that the medium in the negative ionization chamber is in an ionized state under a high voltage state. Therefore, the electrons in the positive ionization chamber and the negative ionization chamber move directionally through the micropores of the object to be measured under an electric field environment, generate microcurrent, and then the charge amount in the micropores to be measured is measured by the charge sensor.

[0014] 4) The method for measuring the aperture of ultra-small micropores according to 1), wherein: In step three, the charge sensor and the sealed box are arranged side by side, the positive ionization chamber and the negative ionization chamber are both arranged in the sealed box, a positive wire extending into the positive ionization chamber is fixed to the side of the sealed box close to the positive ionization chamber, and a negative wire extending into the negative ionization chamber is fixed to the side of the sealed box close to the negative ionization chamber, the negative wire and the positive wire are respectively located on both sides of the charge sensor, the negative wire is electrically connected to the sensing electrode of the charge sensor, and the positive wire is electrically connected to the measuring electrode of the charge sensor.

[0015] According to the above technical solution, the designed positive wire extends through the sealed box to the positive ionization chamber, and the negative wire extends through the sealed box to the negative ionization chamber. When the positive ionization chamber is full of positive charges and the negative ionization chamber is full of negative charges, the pores of the object to be measured on the partition plate connect the positive ionization chamber and the negative ionization chamber. Therefore, under the action of positive and negative charges, microcurrent is generated in the pores of the object to be measured and passes through the object to be measured. The microcurrent formed is sensed by the positive wire and the negative wire, and is transmitted to the charge sensor by the positive wire and the negative wire, and the charge sensor directly determines the charge amount of the object to be measured.

[0016] 5) The method for measuring the aperture of ultra-small micropores according to 4), wherein: A positive electrode detection hole connected to the positive ionization chamber is provided on the side wall of the sealed box body, and the positive electrode detection hole is used for the positive electrode wire to pass through and extend into the positive ionization chamber. A negative electrode detection hole connected to the negative ionization chamber is provided on the other side wall of the sealed box body, and the negative electrode detection hole is used for the negative electrode wire to pass through and extend into the negative ionization chamber.

[0017] Through the above technical solution, the designed positive electrode detection hole is used for the positive electrode wire to pass through and fix the positive electrode wire, so that the positive electrode wire extends into the positive ionization chamber, and the designed negative electrode detection hole is used for the negative electrode wire to pass through and fix the negative electrode wire, so that the negative electrode wire extends into the negative ionization chamber; at the same time, the negative electrode wire cooperates with the positive electrode wire to directly obtain the microcurrent of the object to be measured, thereby obtaining the charge amount of the object to be measured through the charge sensor.

[0018] 6) The method for measuring the aperture of ultra-small micropores according to 2), wherein: The clamp includes a clamping tube, which passes through a partition plate and is fixed on the partition plate. The central axis of the clamping tube is perpendicular to the central axis of the partition plate. The two ends of the clamping tube are respectively located in a positive ionization chamber and a negative ionization chamber. The clamping tube has a clamping channel for clamping and fixing the object to be measured.

[0019] Through the above technical solution, the clamping channel of the clamping tube is used to allow the object to pass through, and the object to be measured is clamped and fixed. Since the two ends of the clamping tube are respectively located in the positive ionization chamber and the negative ionization chamber, therefore, the two ends of the object to be measured passing through the clamping channel are respectively located in the positive ionization chamber and the negative ionization chamber, so that a microcurrent is formed in the object to be measured and the charge amount within the aperture of the object to be measured is obtained; in addition, the clamping tube is fixed by a partition plate to maintain the stability of the clamping tube, thereby achieving stability in the measurement of the object to be measured.

[0020] 7) The method for measuring the aperture of ultra-small micropores according to 6), wherein: The end of the clamping tube facing the positive ionization chamber is connected with a fixing head, the fixing head is located in the positive ionization chamber, a locking channel connected with the clamping channel is provided in the fixing head, and the size of the fixing head is twice the size of the clamping tube.

[0021] Through the above technical solution, the end of the object to be measured located in the positive ionization chamber is fixed by a fixed head; when in use, the object to be measured passes through the locking channel and extends into the clamping channel, and the object to be measured is clamped synchronously by the fixed head and the clamping tube to maintain the stability of the object to be measured. At the same time, the size of the fixed head is twice the size of the clamping tube. Therefore, the fixed head can stably fix the end of the object to be measured located in the positive ionization chamber, thereby improving the stability of measuring the micropores of the object to be measured.

[0022] 8) The method for measuring the aperture of ultra-small micropores according to 7), wherein: A fixing ring is provided between the fixing head and the clamping tube. The fixing ring is sleeved on the end of the clamping tube facing the fixing head, and the fixing ring surrounds the circumference of the clamping channel.

[0023] Through the above technical solution, the designed fixing ring can stabilize the connection between the fixing head and the clamping tube, and at the same time, the fixing ring surrounds the circumference of the clamping channel, which can maintain the clamping stability of the clamping channel on the object to be measured.

[0024] 9) The method for measuring the aperture of ultra-small micropores according to 1), wherein: In step three, the aperture comparison method includes the following steps: S1: Set a variety of standard micropores with known pore sizes, place the test objects with different standard micropores in the clamping space, input high voltage into the positive ionization chamber and the negative ionization chamber respectively, so that the conductive medium in the positive ionization chamber and the negative ionization chamber is in an ionized state, and the conductive medium in the micropores of the test object moves in a directional manner to form a microcurrent, and the standard charge amount in the microcurrent information is measured by the charge sensor; S2: In step three, the charge sensor detects the microcurrent information in the micropores of the object to be measured, and obtains the charge in the micropores of the object to be measured through the microcurrent information. The charge in the micropores of the object to be measured is compared with the standard charge of each test object with a known standard micropore aperture. When the charge in the micropores of the object to be measured is equal to the standard charge of a test object with a known standard micropore aperture, the known standard micropore aperture of the test object is the micropore aperture of the object to be measured.

[0025] Compared with the prior art, the present invention also has the following technical effects: The present invention provides a method for measuring the aperture of ultra-small micropores. In the positive ionization chamber and the negative ionization chamber, the medium is in an ionized state under a high voltage state. The electrons move directionally through the micropores under the electric field, generating microcurrents, which are detected by the charge sensor connected to the positive ionization chamber and the negative ionization chamber through wires. The aperture size of the micropores of the object to be measured is obtained by the data detected by the charge sensor. Thus, the measurement problem of ultra-small micropores is solved, and the method is widely used in the fields of materials, medicine and medicine, and is widely used in the measurement of positive control substances for the sealing integrity of drug packaging in drug research and development and production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A flow chart of a method for measuring the aperture of ultra-small micropores according to the present invention; Figure 2 It is a structural schematic diagram of a sealed box and a charge sensor in a measurement method for testing the aperture of ultra-small micropores of the present invention; Figure 3 for Figure 2 Cross-sectional view of the middle sealing box AA. DETAILED DESCRIPTION

[0027] The following is further described in detail through specific implementation methods: The figure marks in the drawings of the specification include: sealed box 1, positive wire 2, charge sensor 3, negative wire 4, positive ionization chamber 5, negative ionization chamber 6, positive detection hole 7, negative detection hole 8, positive power supply 9, negative power supply 10, fixed head 11, clamping tube 12, fixed ring 13, and object to be measured 14.

[0028] For example, see Figure 1 As shown, the measurement method for testing the aperture of ultra-small micropores in this embodiment includes the following steps: Step 1: setting a positive ionization chamber and a negative ionization chamber, and filling the positive ionization chamber and the negative ionization chamber with a conductive medium, wherein a clamping space for placing and fixing the object to be measured is provided between the positive ionization chamber and the negative ionization chamber, so that the micropores of the object to be measured are connected to the positive ionization chamber and the negative ionization chamber; Step 2: inputting high voltage into the positive ionization chamber and the negative ionization chamber respectively, so that the conductive medium in the positive ionization chamber and the negative ionization chamber is in an ionized state, and the conductive medium in the micropores of the object to be measured moves in a directional manner to form a microcurrent; Step three, using a charge sensor electrically connected to the positive ionization chamber and the negative ionization chamber to detect the microcurrent information in the micropores of the object to be measured, and using the microcurrent information to obtain the charge amount in the micropores of the object to be measured, and using the charge amount to obtain the micropore diameter of the object to be measured by the aperture comparison method.

[0029] Among them, see Figure 3 As shown, in step one of the present embodiment, the positive ionization chamber 5 and the negative ionization chamber 6 are jointly arranged in a sealed box body 1, and a vertically arranged partition plate is provided in the clamping space between the positive ionization chamber 5 and the negative ionization chamber 6, the partition plate is located in the middle position of the sealed box body 1 and separates the positive ionization chamber 5 and the negative ionization chamber 6, and a clamp for clamping the object to be measured 14 is provided in the middle position of the partition plate, and the positive ionization chamber 5 and the negative ionization chamber 6 are respectively located on both sides of the object to be measured 14 and apply positive and negative charges to the object to be measured 14.

[0030] Therefore, in this embodiment, a sealed box body 1 is used to form a sealed environment for the positive ionization chamber 5 and the negative ionization chamber 6 respectively. Under the electric field environment, the positive ionization chamber 5 is filled with positive charges, and the negative ionization chamber 6 is filled with negative charges. The object to be measured 14 is fixed on the partition plate by a clamp, and the two ends of the object to be measured 14 are respectively located in the positive ionization chamber 5 and the negative ionization chamber 6, so that the object to be measured 14 can be stabilized and the accuracy of the charge amount in the micropores of the object to be measured 14 can be ensured.

[0031] See also Figure 3As shown, in step 2 of the present embodiment, positive charge is input into the positive ionization chamber 5 using a positive power supply 9 disposed on the side wall of the sealed box 1, and the positive power supply 9 is used to transport positive charge into the positive ionization chamber 5, and negative charge is input into the negative ionization chamber 6 using a negative power supply 10 disposed on the side wall of the sealed box 1, and the negative power supply 10 is used to transport negative charge into the negative ionization chamber 6.

[0032] The positive power supply 9 is used to supply positive power to the positive ionization chamber 5, so that the medium in the positive ionization chamber 5 is in an ionized state under a high voltage state; the negative power supply 10 is used to supply negative power to the negative ionization chamber 6, so that the medium in the negative ionization chamber 6 is in an ionized state under a high voltage state. Therefore, the electrons in the positive ionization chamber 5 and the negative ionization chamber 6 move directionally through the micropores of the object to be measured 14 under the electric field environment, generate microcurrent, and then measure the charge amount in the measured micropores through the charge sensor 3. In this embodiment, the sensor is not limited to the charge sensor 3, and a current sensor can also be used.

[0033] For more details, see Figure 2 and Figure 3 As shown, in step three of this embodiment, the charge sensor 3 is arranged side by side with the sealed box body 1, the positive ionization chamber 5 and the negative ionization chamber 6 are both arranged in the sealed box body 1, and a positive wire 2 extending into the positive ionization chamber 5 is fixed to the side of the sealed box body 1 close to the positive ionization chamber 5, and a negative wire 4 extending into the negative ionization chamber 6 is fixed to the side of the sealed box body 1 close to the negative ionization chamber 6, the negative wire 4 and the positive wire 2 are respectively located on both sides of the charge sensor 3, the negative wire 4 is electrically connected to the sensing electrode of the charge sensor 3, and the positive wire 2 is electrically connected to the measuring electrode of the charge sensor 3.

[0034] According to the above technical solution, the positive wire 2 is designed to extend through the sealed box 1 to the positive ionization chamber 5, and the negative wire 4 is designed to extend through the sealed box 1 to the negative ionization chamber 6. When the positive ionization chamber 5 is full of positive charges and the negative ionization chamber 6 is full of negative charges, the pores of the object to be measured 14 located on the partition plate connect the positive ionization chamber 5 and the negative ionization chamber 6. Therefore, under the action of positive and negative charges, microcurrent is generated in the pores of the object to be measured 14 and passes through the object to be measured 14. The microcurrent formed is sensed by the positive wire 2 and the negative wire 4, and is transmitted to the charge sensor 3 by the positive wire 2 and the negative wire 4, and the charge sensor 3 directly determines the charge amount of the object to be measured 14.

[0035] A positive electrode detection hole 7 connected to the positive ionization chamber 5 is provided on the side wall of the sealed box body 1, and the positive electrode detection hole 7 is used for the positive electrode wire 2 to pass through and extend into the positive ionization chamber 5. A negative electrode detection hole 8 connected to the negative ionization chamber 6 is provided on the other side wall of the sealed box body 1, and the negative electrode detection hole 8 is used for the negative electrode wire 4 to pass through and extend into the negative ionization chamber 6.

[0036] The designed positive electrode detection hole 7 is used for allowing the positive electrode wire 2 to pass through and fix the positive electrode wire 2, so that the positive electrode wire 2 extends into the positive ionization chamber 5, and the designed negative electrode detection hole 8 is used for allowing the negative electrode wire 4 to pass through and fix the negative electrode wire 4, so that the negative electrode wire 4 extends into the negative ionization chamber 6; at the same time, the negative electrode wire 4 cooperates with the positive electrode wire 2 to directly obtain the microcurrent of the object to be measured 14, thereby obtaining the charge amount of the object to be measured 14 through the charge sensor 3.

[0037] At the same time, in this embodiment, the clamp includes a clamping tube 12, which passes through the partition plate and is fixed on the partition plate. The central axis of the clamping tube 12 is perpendicular to the central axis of the partition plate. The two ends of the clamping tube 12 are respectively located in the positive ionization chamber 5 and the negative ionization chamber 6. The clamping tube 12 has a clamping channel for clamping and fixing the object to be measured 14.

[0038] The clamping channel of the clamping tube 12 is utilized to allow the object 14 to pass through, and the object 14 to be measured is clamped and fixed. Since the two ends of the clamping tube 12 are respectively located in the positive ionization chamber 5 and the negative ionization chamber 6, the two ends of the object 14 to be measured that passes through the clamping channel are respectively located in the positive ionization chamber 5 and the negative ionization chamber 6, so that a microcurrent is formed in the object 14 to be measured, and the charge amount within the aperture of the object 14 to be measured is obtained; in addition, the clamping tube 12 is fixed by a partition plate to maintain the stability of the clamping tube 12, thereby achieving stability in the measurement of the object 14 to be measured.

[0039] Moreover, in this embodiment, the end of the clamping tube 12 facing the positive ionization chamber 5 is connected to a fixed head 11, which is located in the positive ionization chamber 5. A locking channel connected to the clamping channel is provided in the fixed head 11, and the size of the fixed head 11 is twice the size of the clamping tube 12.

[0040] The fixed head 11 is used to fix the end of the object 14 to be measured located in the positive ionization chamber 5; when in use, the object 14 to be measured is passed through the locking channel and extended into the clamping channel, and the object 14 to be measured is clamped synchronously by the fixed head 11 and the clamping tube 12 to maintain the stability of the object 14 to be measured. At the same time, the size of the fixed head 11 is twice the size of the clamping tube 12. Therefore, the fixed head 11 can stably fix the end of the object 14 to be measured located in the positive ionization chamber 5, thereby improving the stability of measuring the micropores of the object 14 to be measured.

[0041] In addition, in this embodiment, a fixing ring 13 is provided between the fixing head 11 and the clamping tube 12. The fixing ring 13 is sleeved on the end of the clamping tube 12 facing the fixing head 11, and the fixing ring 13 surrounds the circumference of the clamping channel. The designed fixing ring 13 can stabilize the connection between the fixing head 11 and the clamping tube 12, and the fixing ring 13 surrounds the circumference of the clamping channel, so as to maintain the clamping stability of the clamping channel to the object 14 to be measured.

[0042] In step 3 of this embodiment, the aperture contrast method includes the following steps: S1: Set a variety of standard micropores with known pore sizes, place the test objects with different standard micropores in the clamping space, input high voltage into the positive ionization chamber and the negative ionization chamber respectively, so that the conductive medium in the positive ionization chamber and the negative ionization chamber is in an ionized state, and the conductive medium in the micropores of the test object moves in a directional manner to form a microcurrent, and the standard charge amount in the microcurrent information is measured by the charge sensor; S2: In step three, the charge sensor detects the microcurrent information in the micropores of the object to be measured, and obtains the charge in the micropores of the object to be measured through the microcurrent information. The charge in the micropores of the object to be measured is compared with the standard charge of each test object with a known standard micropore aperture. When the charge in the micropores of the object to be measured is equal to the standard charge of a test object with a known standard micropore aperture, the known standard micropore aperture of the test object is the micropore aperture of the object to be measured.

[0043] When the positive ionization chamber and the negative ionization chamber are in a high-voltage state, a directional microcurrent is formed in the object to be measured. The charge generated by the microcurrent is transported to the charge sensor by the wires on both sides of the sealed cavity. The charge sensor directly obtains the charge of the object to be measured, and the pore size of the object to be measured is obtained through the charge of the object to be measured. Accurate and reliable measurement results can be obtained for objects with ultra-micropores, providing important data support for positive samples of drug packaging sealing, material performance evaluation, and filtration effect optimization.

[0044] The above are only embodiments of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for measuring the aperture of ultra-small micropores, characterized in that: The following steps are involved: Step 1: setting a positive ionization chamber and a negative ionization chamber, and filling the positive ionization chamber and the negative ionization chamber with a conductive medium, wherein a clamping space for placing and fixing the object to be measured is provided between the positive ionization chamber and the negative ionization chamber, so that the micropores of the object to be measured are connected to the positive ionization chamber and the negative ionization chamber; Step 2: inputting high voltage into the positive ionization chamber and the negative ionization chamber respectively, so that the conductive medium in the positive ionization chamber and the negative ionization chamber is in an ionized state respectively, thereby causing the conductive medium in the micropores of the object to be measured to move in a directional manner to form a microcurrent; Step three, using a charge sensor electrically connected to the positive ionization chamber and the negative ionization chamber to detect the microcurrent information in the micropores of the object to be measured, and using the microcurrent information to obtain the charge amount in the micropores of the object to be measured, and using the charge amount to obtain the micropore diameter of the object to be measured by the aperture comparison method.

2. The method for measuring the aperture of ultra-small micropores according to claim 1, characterized in that: In step one, the positive ionization chamber and the negative ionization chamber are jointly arranged in a sealed box, and a vertically arranged partition plate is provided in the clamping space between the positive ionization chamber and the negative ionization chamber. The partition plate is located in the middle position of the sealed box and separates the positive ionization chamber from the negative ionization chamber. A clamp for clamping the object to be measured is provided in the middle position of the partition plate. The positive ionization chamber and the negative ionization chamber are respectively located on both sides of the object to be measured and apply positive and negative charges to the object to be measured.

3. The method for measuring the aperture of ultra-small micropores according to claim 1, characterized in that: In step 2, positive charge is input into the positive ionization chamber using a positive power supply arranged on the side wall of the sealed box, and the positive power supply is used to transport positive charge into the positive ionization chamber. Negative charge is input into the negative ionization chamber using a negative power supply arranged on the side wall of the sealed box, and the negative power supply is used to transport negative charge into the negative ionization chamber.

4. The method for measuring the aperture of ultra-small micropores according to claim 1, characterized in that: In step three, the charge sensor and the sealed box are arranged side by side, the positive ionization chamber and the negative ionization chamber are both arranged in the sealed box, a positive wire extending into the positive ionization chamber is fixed to the side of the sealed box close to the positive ionization chamber, and a negative wire extending into the negative ionization chamber is fixed to the side of the sealed box close to the negative ionization chamber, the negative wire and the positive wire are respectively located on both sides of the charge sensor, the negative wire is electrically connected to the sensing electrode of the charge sensor, and the positive wire is electrically connected to the measuring electrode of the charge sensor.

5. The method for measuring the aperture of ultra-small micropores according to claim 4, characterized in that: A positive electrode detection hole connected to the positive ionization chamber is provided on the side wall of the sealed box body, and the positive electrode detection hole is used for the positive electrode wire to pass through and extend into the positive ionization chamber. A negative electrode detection hole connected to the negative ionization chamber is provided on the other side wall of the sealed box body, and the negative electrode detection hole is used for the negative electrode wire to pass through and extend into the negative ionization chamber.

6. The method for measuring the aperture of ultra-small micropores according to claim 2, characterized in that: The clamp includes a clamping tube, which passes through a partition plate and is fixed on the partition plate. The central axis of the clamping tube is perpendicular to the central axis of the partition plate. The two ends of the clamping tube are respectively located in a positive ionization chamber and a negative ionization chamber. The clamping tube has a clamping channel for clamping and fixing the object to be measured.

7. The method for measuring the aperture of ultra-small micropores according to claim 6, characterized in that: The end of the clamping tube facing the positive ionization chamber is connected with a fixing head, the fixing head is located in the positive ionization chamber, a locking channel connected with the clamping channel is provided in the fixing head, and the size of the fixing head is twice the size of the clamping tube.

8. The method for measuring the aperture of ultra-small micropores according to claim 7, characterized in that: A fixing ring is provided between the fixing head and the clamping tube. The fixing ring is sleeved on the end of the clamping tube facing the fixing head, and the fixing ring surrounds the circumference of the clamping channel.

9. The method for measuring the aperture of ultra-small micropores according to claim 1, characterized in that: In step three, the aperture comparison method includes the following steps: S1: Set a variety of standard micropores with known pore sizes, place the test objects with different standard micropores in the clamping space, input high voltage into the positive ionization chamber and the negative ionization chamber respectively, so that the conductive medium in the positive ionization chamber and the negative ionization chamber is in an ionized state, and the conductive medium in the micropores of the test object forms a microcurrent that moves in a directional manner, and the standard charge amount in the microcurrent information is measured by the charge sensor; S2: In step three, the charge sensor detects the microcurrent information in the micropores of the object to be measured, and obtains the charge in the micropores of the object to be measured through the microcurrent information. The charge in the micropores of the object to be measured is compared with the standard charge of each test object with a known standard micropore aperture. When the charge in the micropores of the object to be measured is equal to the standard charge of a test object with a known standard micropore aperture, the known standard micropore aperture of the test object is the micropore aperture of the object to be measured.

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