A device for detecting thickness uniformity of nanofiber membrane

Abstract

The present invention relates to the field of thickness measurement technology, and in particular to a thickness uniformity detection device for a nanofiber membrane, comprising a main body, a positioning part, a white light interference thickness measurement sensor, a side expansion module, a pressure cover part, a flattening module, a collecting part and a processing control platform, wherein the main body comprises a base body, a detection platform is installed on the upper side of the base body, a sink groove is provided on the inner side of the upper part of the detection platform, a slide groove penetrating the detection platform is provided on the right side of the sink groove, a lifting part is installed on the inner side of the sink groove, a conducting part is installed on the inner side of the slide groove, and the positioning part is installed on the upper side of the base body. In the present invention, by providing structures such as the side expansion module, the pressure cover part and the flattening module, the thickness uniformity detection device can flatly and fully unfold and lay the nanofiber membrane sample on the surface of the detection platform before testing the sample, so that the sample and the detection platform are completely fitted without wrinkles, so as to ensure that there will be no error in subsequent thickness testing.

Description

Technical Field

[0001] The invention relates to the technical field of thickness measurement, in particular to a device for detecting the thickness uniformity of a nanofiber membrane. Background Art

[0002] Nanofiber membranes have broad application prospects in the field of high-efficiency air filtration and are expected to replace traditional ultrafine glass fiber filters as a new type of high-efficiency filter material. In filtration applications, the thickness uniformity of nanofiber membranes is crucial to filtration efficiency and filtration pressure drop. Uneven thickness will lead to uneven fluid distribution during the filtration process, thereby reducing filtration efficiency and increasing filtration resistance. Therefore, multi-point detection of the thickness of the nanofiber membrane is required.

[0003] The existing white light interferometry thickness sensor is usually used to detect the thickness of the nanofiber membrane. The white light interferometry thickness sensor is based on the principle of light interference. The thickness of the object to be measured (such as the nanofiber membrane) is determined by measuring the interference signal generated by the reflection of the light source inside the object to be measured. When the light emitted by the white light source is irradiated on the surface of the object, the light is reflected on different interfaces inside the object and interference occurs. By capturing and analyzing these interference signals, the thickness of the object can be accurately calculated. It has the advantages of high precision, non-contact measurement, fast sampling and strong anti-interference ability. However, the placement of the sample in the actual detection process also affects the detection accuracy. The common placement method is to lay the sample flat on the detection table with a clamp, but this placement method cannot make the fiber membrane completely fit and lay flat on the surface of the detection table. The fiber membrane is prone to wrinkles on the detection table, which leads to errors in the measurement data. Therefore, based on the above problems, a thickness uniformity detection device for nanofiber membrane is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a thickness uniformity detection device for nanofiber membranes, so as to solve the problem that before the existing thickness uniformity detection devices detect the samples, they are generally laid flat on the detection table by clamps. This placement method cannot make the fiber membrane completely fit and lay flat on the surface of the detection table, and the nanofiber membrane is prone to wrinkles on the detection table, which leads to errors in subsequent measurement data.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A device for detecting the thickness uniformity of a nanofiber membrane comprises a main body, a positioning part, a white light interference thickness measurement sensor, a side expansion module, a pressure cover part, a flattening module, a collecting part and a processing control platform, wherein the main body comprises a seat body, a detection platform is installed on the upper side of the seat body, a sink groove is provided on the inner side of the upper part of the detection platform, a slide groove for penetrating the detection platform is provided on the right side of the sink groove, a lifting part is installed on the inner side of the sink groove, a conducting part is installed on the inner side of the slide groove, the positioning part is installed on the upper side of the seat body, the white light interference thickness measurement sensor is installed at the positioning part, the side expansion module comprises a rail shell located on the right side of the sink groove and fixed on the upper side of the detection platform, a through rail is provided on the upper side plate surface of the rail shell, and the inner side of the rail shell is rotatably connected with a plurality of rails exposed at both ends front and back. The front and rear ends of the positive and negative screw rods are fixedly connected with an adjusting wheel, and a group of two linkage rails are installed at the positive and negative screw rods, and the linkage rails include a rail block spirally connected to the threads of the positive and negative screw rods, a guide is fixedly connected to the left side of the rail block, a metal back piece is slidably connected to the outer side of the guide piece and is longitudinally arranged, a magnetic pressure block is adsorbed on the left side of the metal back piece, a finger block located on the inner side of the through rail is fixedly connected to the upper side of the rail block, a scale bar aligned with the through rail is fixedly connected in the upper slot of the rail shell, a group of two guide reset parts are symmetrically installed on the left end surface of the rail shell, the pressure cover part is installed on the outer upper side of the side expansion module, the flattening module is installed at the pressure cover part, and a processing control platform is provided on the right side of the main body.

[0007] Preferably, the pressure cover part includes a rotating cover rotatably connected to the exposed ends of the positive and negative threaded rods, cover openings are opened on both sides of the right plate of the rotating cover, and the inner sides of the cover openings are slidably connected with pull-out plates, the flattening module includes a rail plate located between a group of cover openings and fixedly connected to the inner wall of the rotating cover, the inner side of the rail plate is slidably connected to a base frame part, the base frame part includes a rail frame slidably connected to the inner wall of the rail plate, the front and rear ends of the rail frame are fixedly connected to guide bars, a through groove is opened on the inner side of the T-block of the rail frame, a rotating hole is opened on the upper side of the through groove, and the base frame part An implementation part is installed on the left side, and the implementation part includes a roller frame. The front and rear sides of the roller frame are provided with guide grooves slidably connected to the guide strips. A rotating roller is rotatably connected to the inner side of the roller frame. The right side of the roller frame is fixedly connected to a first magnetic block located on the inner side of the through groove. An adjustment part is installed on the base frame, and the adjustment part includes a connecting rod rotatably connected to the inner wall of the rotating hole. The lower end of the connecting rod is fixedly connected to a fixing sleeve located on the inner side of the through groove, and the inner side of the fixing sleeve is fixedly connected to a second magnetic block. The upper end of the connecting rod passes through the rail plate and the rotating cover and is fixedly connected to a pinch block.

[0008] Preferably, the positioning part is composed of an X / Y axis conveyor, a bracket, a frame plate and a cylinder, the white light interferometry thickness sensor is installed at the lower end of the cylinder push rod of the positioning part, the white light interferometry thickness sensor is installed on the upper side of the detection platform, and the white light interferometry thickness sensor, the positioning part and the processing control platform are electrically connected.

[0009] Preferably, the outer end face of the track block is slidably connected to the inner wall of the track shell, the finger blocks are arranged close to the scale bar, the upper end face of the scale bar is lower than the upper end face of the track shell, a spacing is arranged between the lower end of the track plate and the track shell, a spacing is arranged between the implementation part, the base frame part and the track shell, and the right chamfer of the upper end face of the track shell is rounded.

[0010] Preferably, the outer diameter of the first magnetic block is smaller than the inner diameter of the through groove, the magnetic directions of the first magnetic block and the second magnetic block are opposite, a convex strip group is arranged on the right end face of the pull-out plate, a damping ring is arranged on the right end face of the pull-out plate, and a pressure block is installed on the inner side of the damping ring of the pull-out plate.

[0011] Preferably, the lifting part includes a lifting shell located at the lower side of the metal back part and the magnetic pressure block, a group of multiple air holes are opened at the left end surface of the lifting shell, an air inlet is opened at the lower side of the lifting shell, the conducting part includes a guide shell, a splicing interface is opened on the upper side of the guide shell, the right side of the guide shell is connected to a fixing frame, the inner side of the fixing frame is fixedly connected to a filter plate, the right plate of the rotating cover is opened with a mounting position which is aligned with the through rail after rotation, the inner side of the mounting position is fixedly connected to a filter strip, the upper notch of the rotating cover is connected to an exhaust shell, and an exhaust fan is installed on the upper side of the exhaust shell, the collecting part includes an outer shell fixedly connected to the left end surface of the seat body, a ventilation hood is fixedly connected to the upper side opening of the outer shell, the upper side of the outer shell is connected to a hose, the outer side of the hose away from the outer shell is fixedly connected to a connecting sleeve, and the inner side of the outer shell is slidably connected to an inner shell.

[0012] Preferably, the upper end surface of the lifting shell and the upper end surface of the detection platform are arranged in the same plane, the lifting shell, the detection platform and the metal back part are made of the same material, the guide reset part is composed of an upper base rail, a lower push part and a reset spring, the reset spring of the guide reset part is arranged between the upper base rail and the lower push part, the upper base rail of the guide reset part is fixedly connected to the left end surface of the rail shell, the lower push part of the guide reset part is fixedly connected to the upper end surface of the lifting shell, a spacing is arranged between the upper end surfaces of the magnetic pressure block and the metal back part and the upper end surface of the rail shell, the inner diameter size of the connecting sleeve is the same as the outer diameter size of the exhaust fan, and the exhaust fan is electrically connected to the processing and control platform.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. In the present invention, by setting structures such as the side expansion module, the pressure cover part and the flattening module, the main body is used to carry the side expansion module, the pressure cover part and the flattening module. The side expansion module can fully expand and position the side of the nanofiber membrane sample on the test table to avoid wrinkles or deformation on the side of the sample. Then, the flattening module is flipped to the upper side of the nanofiber membrane sample by the pressure cover part, so that the nanofiber membrane sample can be flatly expanded from right to left. Finally, the unfolded sample is positioned by the finishing operation, so that the thickness uniformity detection device can fully expand and lay the nanofiber membrane sample on the surface of the test table before testing the sample, so that the sample and the test table are completely fitted without wrinkles, so as to ensure that there will be no error in the subsequent thickness detection, and solve the problem that the existing thickness uniformity detection device generally lays the sample on the test table by clamps before testing the sample. This placement method cannot make the fiber membrane completely fit and lay it on the surface of the test table, and the nanofiber membrane is prone to wrinkles on the test table, which leads to errors in subsequent measurement data.

[0015] 2. In the present invention, by providing structures such as the covering part, the collecting part, the conducting part and the lifting part, the leftward displacement of the conducting part will squeeze and push up the lifting part, so that the conducting part is connected with the lifting part, and the upward movement of the lifting part will make the right side of the sample higher than the detection table on the one hand, and on the other hand, the air hole will be exposed from the sink. Finally, the connecting sleeve is sleeved on the outside of the exhaust fan to complete the preparation operation of cleaning. At this time, the exhaust fan can be started to exhaust air. The external air is divided into two streams and enters the pressure cover part. One airflow passes through the filter strip and enters the rail shell through the through rail, and then is discharged into the rotary cover through the rail shell. The airflow discharged through the rail shell will flow along the upper surface of the sample and enter the exhaust shell. The other airflow passes through the filter plate and enters the guide shell. Then it enters the lifting shell through the connection between the splicing interface and the air inlet, and is discharged through the air holes. The airflow discharged through the air holes will flow along the lower surface of the sample and enter the vacuum shell. The two airflows flowing above and below the sample will pre-expand the sample horizontally from right to left, and take away impurities that may exist on the surface of the sample and the upper end surface of the testing table. This enables the thickness uniformity detection device to clean impurities on the surface of the nanofiber membrane sample and the placement surface of the testing table when placing the nanofiber membrane sample, so as to avoid impurities affecting the thickness detection accuracy. This solves the problem that the thickness of the nanofiber module is generally in the nanometer or micron level. If there are impurities on the surface of the nanofiber membrane sample and the placement surface of the testing table, the thickness detection accuracy may be greatly affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 For the present invention Figure 1 Another perspective structural diagram of;

[0018] Figure 3 It is a structural schematic diagram of the main body of the present invention;

[0019] Figure 4 For the present invention Figure 3 A schematic cross-sectional structure diagram of ;

[0020] Figure 5 For the present invention Figure 4 Schematic diagram of the testing platform structure;

[0021] Figure 6 It is a bottom view structural schematic diagram of the lifting part of the present invention;

[0022] Figure 7 It is a structural schematic diagram of the conducting part of the present invention;

[0023] Figure 8 It is a structural schematic diagram of the side expansion module of the present invention;

[0024] Fig. 9 It is a structural schematic diagram of the positive and negative threaded rods of the present invention;

[0025] Fig.10 It is a structural schematic diagram of the guide reset member of the present invention;

[0026] Fig.11 It is a structural schematic diagram of the gland portion of the present invention;

[0027] Fig.12 For the present invention Fig.11 Another perspective structural diagram of;

[0028] Fig.13 It is a bottom view structural schematic diagram of the air extraction shell of the present invention;

[0029] Fig.14 It is a structural schematic diagram of the flattening module of the present invention;

[0030] Fig.15 For the present invention Fig.14 Schematic diagram of the structure after the action;

[0031] Fig.16 For the present invention Fig.15 A schematic cross-sectional structure diagram of ;

[0032] Fig.17 For the present invention Fig.16 A schematic diagram of the structure of the deregulation unit;

[0033] Fig.18 It is a schematic diagram of the expanded structure of the collecting part of the present invention;

[0034] Fig.19 For the present invention Figure 1 Schematic diagram of the structure after the action.

[0035] In the figure: 1. Main body; 11. Base; 12. Test table; 13. Sink; 14. Slide; 15. Lifting part; 151. Lifting shell; 152. Air hole; 153. Air inlet; 16. Conducting part; 161. Guide shell; 162. Joint interface; 163. Fixed frame; 164. Filter plate; 2. Adjusting part; 3. White light interferometric thickness sensor; 4. Side expansion module; 41. Rail shell; 42. Through rail; 43. Positive and negative screw rod; 44. Adjusting wheel; 45. Linking rail member; 451. Rail block; 452. Guide member; 453. Metal back member; 454. Finger block; 46. Magnetic pressure block; 47. Scale bar; 48. Guide reset member; 5. Pressure cover part; 51, rotating cover; 52, installation position; 53, filter strip; 54, cover; 55, pull-out plate; 56, exhaust shell; 57, exhaust fan; 6, flattening module; 61, rail plate; 62, base frame; 621, rail frame; 622, guide strip; 623, rotating hole; 624, through groove; 63, implementation part; 631, roller frame; 632, guide groove; 633, rotating roller; 634, first magnetic block; 64, adjustment part; 641, connecting rod; 642, fixing sleeve; 643, second magnetic block; 644, pinching block; 7, collecting part; 71, outer shell; 72, ventilation hood; 73, hose; 74, connecting sleeve; 75, inner shell; 8, processing control platform. DETAILED DESCRIPTION

[0036] See also Figure 1-19 , the present invention provides a technical solution:

[0037] A device for detecting the thickness uniformity of a nanofiber membrane comprises a main body 1, a positioning part 2, a white light interference thickness sensor 3, a side expansion module 4, a pressure cover part 5, a flattening module 6, a collecting part 7 and a processing control platform 8. The main body 1 comprises a base 11, a detection platform 12 is installed on the upper side of the base 11, a sink 13 is provided on the inner side of the upper part of the detection platform 12, a slide 14 for penetrating the detection platform 12 is provided on the right side of the sink 13, a lifting part 15 is installed on the inner side of the sink 13, a conducting part 16 is installed on the inner side of the slide 14, the positioning part 2 is installed on the upper side of the base 11, the white light interference thickness sensor 3 is installed at the positioning part 2, the side expansion module 4 comprises a rail shell 41 which is located on the right side of the sink 13 and fixed on the upper side of the detection platform 12, and a plate surface of the upper side of the rail shell 41 is provided. A through rail 42 is provided, and a positive and negative threaded rod 43 exposed at both ends thereof is rotatably connected to the inner side of the rail housing 41, and an adjusting wheel 44 is fixedly connected to the front end of the positive and negative threaded rod 43, and a group of two linked rail members 45 are installed at the positive and negative threaded rod 43, and the linked rail member 45 includes a rail block 451 spirally connected to the thread of the positive and negative threaded rod 43, and a guide 452 is fixedly connected to the left side of the rail block 451, and a metal back member 453 arranged longitudinally is slidably connected to the outer side of the guide member 452, and a magnetic pressure block 46 is adsorbed on the left side of the metal back member 453, and a finger block 454 located on the inner side of the through rail 42 is fixedly connected to the upper side of the rail block 451, and a scale bar 47 aligned with the through rail 42 is fixedly connected in the upper side slot of the rail housing 41, and a group of two symmetrically installed on the left end surface of the rail housing 41 The guide reset member 48 is arranged on the pressure cover part 5, the pressure cover part 5 is installed on the outer upper side of the side expansion module 4, the flattening module 6 is installed on the pressure cover part 5, and a processing control platform 8 is arranged on the right side of the main body 1. The pressure cover part 5 includes a rotating cover 51 which is rotatably connected to the exposed ends of the positive and negative screw rods 43, and cover openings 54 are provided on both sides of the right plate of the rotating cover 51, and a pull-out plate 55 is slidably connected to the inner side of the cover opening 54. The flattening module 6 includes a rail plate 61 which is located between a group of cover openings 54 and is fixedly connected to the inner wall of the rotating cover 51, and a base frame part 62 is slidably connected to the inner side of the rail plate 61. The base frame part 62 includes a rail frame 621 which is slidably connected to the inner wall of the rail plate 61, and a guide bar 622 is fixedly connected to the front and rear ends of the rail frame 621, and a through groove 624 is provided on the inner side of the T block of the rail frame 621. A rotating hole 623 is provided on the upper side of the frame part 62, and an implementation part 63 is installed on the left side of the base frame part 62. The implementation part 63 includes a roller frame 631. The front and rear sides of the roller frame 631 are provided with guide grooves 632 slidably connected to the guide strip 622. The inner side of the roller frame 631 is rotatably connected to a rotating roller 633. The right side of the roller frame 631 is fixedly connected to a first magnetic block 634 located on the inner side of the through groove 624. An adjusting part 64 is installed on the frame part 62. The adjusting part 64 includes a connecting rod 641 rotatably connected to the inner wall of the rotating hole 623. The lower end of the connecting rod 641 is fixedly connected to a fixing sleeve 642 located on the inner side of the through groove 624. The inner side of the fixing sleeve 642 is fixedly connected to a second magnetic block 643. The upper end of the connecting rod 641 passes through the track plate 61 and the rotating cover 51 and is fixedly connected to a pinching block 644.Through this arrangement, the flattening module 6 that flips over to the upper side of the nanofiber membrane sample with the pressure cover part 5 can flatten the nanofiber membrane sample from right to left; the positioning part 2 is composed of an X / Y axis conveyor, a bracket, a frame plate and a cylinder, and the white light interference thickness sensor 3 is installed at the lower end of the cylinder push rod of the positioning part 2. Through this arrangement, the positioning part 2 can adjust the position and height of the white light interference thickness sensor 3, and the white light interference thickness sensor 3 is installed on the upper side of the detection platform 12. Through this arrangement, the white light interference thickness sensor The sensor 3 can measure the thickness of the fiber membrane sample on the lower side. The white light interference thickness sensor 3, the adjustment unit 2 and the processing control platform 8 are electrically connected. Through this setting, the processing control platform 8 can control the white light interference thickness sensor 3 and can also receive the data information of the white light interference thickness sensor 3 for processing; the outer end surface of the track block 451 is slidably connected to the inner wall of the track shell 41, and the finger blocks 454 are all set close to the scale bar 47. Through this setting, the displacement distance of the linkage track member 45 can be determined. The scale bar 4 The upper end surface of 7 is lower than the upper end surface of the track housing 41. Through this arrangement, after the rotating cover 51 is rotated, the scale bar 47 will not contact the rotating cover 51. A gap is set between the lower end of the track plate 61 and the track housing 41, and a gap is set between the implementation part 63, the base part 62 and the track housing 41. The right chamfer of the upper end surface of the track housing 41 is a rounded corner setting. Through this arrangement, the rotation of the pressing cover part 5 and the flattening module 6 will not be affected by the interference of the track housing 41; the outer diameter of the first magnetic block 634 is smaller than the inner diameter of the through slot 624, and the first magnetic block 634 is smaller than the inner diameter of the through slot 624. The magnetic direction of the block 634 is opposite to that of the second magnetic block 643. This arrangement makes the second magnetic block 643 and the first magnetic block 634 attract each other. The right end face of the pull-out plate 55 is provided with a convex strip group. This arrangement makes it convenient for users to push the pull-out plate 55 to move. The right end face of the pull-out plate 55 is provided with a damping ring. A pressure block is installed inside the damping ring of the pull-out plate 55. This arrangement makes the damping ring of the pull-out plate 55 used to position the pressure block, and the pressure block of the pull-out plate 55 can position the nanofiber membrane sample after unfolding.

[0038] like Figure 3-Figure 8 , Figure 10-13 , Figure 18-Figure 19As shown, the lifting part 15 includes a lifting shell 151 located at the lower side of the metal back part 453 and the magnetic pressure block 46, a group of multiple air holes 152 are opened at the left end surface of the lifting shell 151, and an air inlet 153 is opened at the lower side of the lifting shell 151. The conducting part 16 includes a guide shell 161, and a splicing interface 162 is opened on the upper side of the guide shell 161. The right side of the guide shell 161 is connected to a fixed frame 163, and the inner side of the fixed frame 163 is fixedly connected to a filter plate 164. The right plate of the rotating cover 51 is opened with a mounting position 52 that is aligned with the through rail 42 after rotation. A filter strip 53 is fixedly connected to the inner side of the mounting position 52, an exhaust shell 56 is connected to the upper notch of the rotating cover 51, an exhaust fan 57 is installed on the upper side of the exhaust shell 56, the collecting part 7 includes a shell 71 fixedly connected to the left end surface of the seat body 11, a ventilation hood 72 is fixedly connected to the upper side of the shell 71, a hose 73 is connected to the upper side of the shell 71, a connecting sleeve 74 is fixedly connected to the outer side of the hose 73 away from the shell 71, and an inner shell 75 is slidably connected to the inner side of the shell 71. Through this arrangement, the leftward displacement of the conducting part 16 will affect the lifting part 15 The conducting part 16 is squeezed and pushed upward to connect with the lifting part 15. The upward movement of the lifting part 15 will make the right side of the sample higher than the testing table 12, and the air hole 152 will be exposed from the sink 13. Finally, the connecting sleeve 74 is sleeved on the outer side of the exhaust fan 57 to complete the preparation operation of cleaning. At this time, the exhaust fan 57 can be started to exhaust air. The external air is divided into two streams and enters the pressure cover part 5. One stream passes through the filter strip 53 and then enters the rail housing 41 through the through rail 42, and then is discharged into the rotating cover 51 through the rail housing 41. The exhausted airflow will flow along the upper surface of the sample and enter the air extraction shell 56. Another airflow will enter the guide shell 161 after being filtered by the filter plate 164, and then enter the lifting shell 151 through the connection between the joint 162 and the air inlet 153, and then be discharged through the air hole 152. The airflow discharged through the air hole 152 will flow along the lower surface of the sample and enter the air extraction shell 56. The circulation of the two airflows above and below the sample will pre-expand the sample horizontally from right to left, and take away impurities that may exist on the surface of the sample and the upper end surface of the detection table 12.The upper end surface of the lifting shell 151 and the upper end surface of the detection table 12 are arranged in the same plane. Through this arrangement, the sample part fixed on the lifting shell 151 can be at the same height as the sample part on the detection table 12. The lifting shell 151, the detection table 12 and the metal back part 453 are made of the same material. Through this arrangement, the magnetic pressure block 46 can be adsorbed on the lifting shell 151. The guide reset member 48 is composed of an upper base rail, a lower push member and a reset spring. The reset spring of the guide reset member 48 is arranged between the upper base rail and the lower push member. The upper base rail of the guide reset member 48 is fixedly connected to the left end surface of the rail shell 41. The lower push member of the guide reset member 48 is connected to the lifting shell 151. The upper end surface is fixedly connected. Through this setting, after the conduction part 16 is reset to the right, the guide reset member 48 can guide and reset the upward lifting shell 151 downward. A gap is set between the upper end surface of the magnetic pressure block 46 and the metal back member 453 and the upper end surface of the rail shell 41. Through this setting, there is space for the upward movement of the magnetic pressure block 46 and the metal back member 453. The inner diameter size of the connecting sleeve 74 is the same as the outer diameter size of the exhaust fan 57. Through this setting, the connecting sleeve 74 can be sleeved on the outside of the exhaust fan 57. The exhaust fan 57 is electrically connected to the processing control platform 8. Through this setting, the processing control platform 8 can control the operation of the exhaust fan 57. ;

[0039] Workflow: The detection operation steps of the thickness uniformity detection device for the nanofiber membrane are as follows. It should be noted that the electrical appliances of this device are all powered by an external power supply; the side expansion operation steps are as follows: first, the nanofiber membrane is cut into samples of suitable sizes, and then the samples are placed on the upper side of the detection table 12 by means of clamps. At this time, the two magnetic pressure blocks 46 are removed from the corresponding metal back parts 453, and then the magnetic pressure blocks 46 are pressed on the two corners on the right side of the sample, and then the magnetic pressure blocks 46 are translated to displace the corners of the sample with the pressure cover on the magnetic pressure blocks 46, so that the two magnetic pressure blocks 46 are reset and adsorbed on the corresponding metal back parts 453, and with the reset displacement of the magnetic pressure blocks 46, the two corners on the right side of the sample will also move to the upper side of the lifting shell 151, and at this time, the magnetic pressure blocks 46 will press the corners of the sample on the upper side of the lifting shell 151 by moving downward by magnetic attraction, After the positioning of the two right corners of the sample is completed, the positive and negative screw rods 43 are driven to rotate by rotating the adjusting wheel 44. The rotation of the positive and negative screw rods 43 will drive the two side linkage rails 45 connected thereto to move backwards. The displacement of the two side linkage rails 45 will, on the one hand, drive the two magnetic pressure blocks 46 adsorbed thereto to move backwards, thereby driving the two right corners of the sample to move backwards, thereby expanding the side of the sample. On the other hand, the displacement of the linkage rail 45 will cause its finger block 454 to move. The staff determines the spacing between the two magnetic pressure blocks 46 by observing the scale of the finger block 454 pointing to the scale bar 47. At this time, the staff can reasonably adjust the spacing between the two magnetic pressure blocks 46 according to the side size of the sample, so as to fully expand the side of the sample and avoid wrinkles or deformation on the side of the sample. The side expansion operation of the sample is completed through the above steps.Cleaning operation steps: After the side expansion operation is completed, the pressure cover part 5 is rotated 90 degrees to the left, so that the pressure cover part 5 changes from a vertical state to a horizontal state and fits with the test table 12, and the sample is completely covered. At the same time, the installation position 52 and the filter strip 53 that are rotated and displaced will be aligned and connected with the through rail 42, and then the conductive part 16 is pushed to the left through the guidance of the slide groove 14. The displacement of the conductive part 16 will squeeze and push the lifting part 15 upward, so that the joint 162 is aligned with the air inlet 153, so that the conductive part 16 and the lifting part 15 are aligned. The upward movement of the lifting part 15 will, on the one hand, cause the magnetic pressure block 46, the metal back piece 453 and the unfolded side of the sample to move upward, so that the right side of the sample is higher than the upper end surface of the detection platform 12, and on the other hand, cause the air hole 152 that moves with the lifting shell 151 to be exposed from the sink 13 (the air hole 152 is on the lower side of the sample). Finally, the connecting sleeve 74 is sleeved on the outer side of the exhaust fan 57 to complete the preparation operation for cleaning. At this time, the exhaust fan 57 can be started to run the exhaust through the processing control platform 8, and the external air is divided into two streams. After entering the gland portion 5, one airflow is filtered by the filter strip 53 and then enters the rail housing 41 through the through rail 42, and then is discharged through the rail housing 41 into the rotary cover 51. The airflow discharged through the rail housing 41 will flow along the upper surface of the sample and enter the suction housing 56. Another airflow is filtered by the filter plate 164 and enters the guide housing 161, and then enters the lifting housing 151 through the connection between the joint 162 and the air inlet 153, and then is discharged through the air hole 152. The airflow discharged through the air hole 152 will flow along the sample. The two airflows flow along the upper and lower surfaces of the sample and enter the exhaust shell 56. The sample is pre-expanded horizontally from right to left through the circulation of the two airflows above and below the sample, and impurities that may exist on the sample surface and the upper end surface of the test table 12 are taken away to prevent the impurities from affecting the detection accuracy of the thickness detection. When the two airflows carrying impurities converge at the exhaust shell 56, the impurities are transported to the inner shell 75 through the exhaust fan 57 and the hose 73 for collection, and the cleaning of the sample and the test table 12 is completed. The cleaning operation is completed through the above steps.The flat unfolding operation steps are as follows: after cleaning, the conducting part 16 is pulled back to the right to reset, so that the lifting part 15 is displaced downward and reset through the guide reset part 48, so that the surface where the unfolded side of the sample is located is once again in the same plane with the upper end surface of the detection table 12. After the reset is completed, the fixing sleeve 642 and the second magnetic block 643 are rotated (rotated 180 degrees) by the pinching block 644 and the linkage rod 641. The rotation of the second magnetic block 643 will change the magnetic direction, so that the second magnetic block 643 and the first magnetic block 634 change from oppositely attracted to like repelled, and the first magnetic block 634 will be detached from the through groove 624 under the influence of the repulsive force. The roller frame 631 and the rotating roller 633 are moved toward the sample with the guide strips 622 and the guide grooves 632 as the guides, so that the rotating roller 633 is pressed on the upper side of the sample. At this time, the base frame 62 can be pulled to move along the track plate 61, and the displacement of the base frame 62 will drive the rotating roller 633 of the implementation portion 63 to move, so that the displacement rolling of the rotating roller 633 can completely flatten the sample that has been pre-expanded laterally from right to left, so that the sample is completely fitted with the testing table 12 without wrinkles, so as to ensure that there will be no error in the subsequent thickness detection. After the flattening operation is completed, the finishing operation is performed. 1. Pull open the pull-out plates 55 on both sides to expose the cover 54 and the unfolded sample. At this time, remove the pressure block on the pull-out plate 55, and press the pressure block on the sample through the cover 54 to position the unfolded sample. 2. Adjust the magnetic direction of the second magnetic block 643 by rotating the adjustment part 64, so that the second magnetic block 643 and the first magnetic block 634 are changed to the state of opposite magnetic directions again. Through the attraction of opposite poles, the first magnetic block 634 drives the roller frame 631 and the rotating roller 633 to move and reset in the direction of the second magnetic block 643. The flat unfolding operation is completed through the above steps. Inspection operation steps, turn the cover part 5 to the right, Flip open and reset to expose the sample that has been positioned and flattened on the test platform 12. At this time, the processing control platform 8 controls the operation of the adjustment unit 2, and the position and height of the white light interference thickness sensor 3 are adjusted by the adjustment unit 2, so that the white light interference thickness sensor 3 can apply a measuring light source to each position of the sample. The interference signal generated by the reflection of the measuring light source inside the sample (nanofiber membrane) will be collected at the processing control platform 8. After processing, the thickness size of each position is obtained to determine whether the thickness uniformity of the nanofiber membrane sample meets the standard. The above steps complete the detection operation of the nanofiber membrane. ;

[0040] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above are only preferred implementation methods of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A device for detecting the thickness uniformity of a nanofiber membrane, comprising a main body (1), a positioning unit (2), a white light interferometric thickness sensor (3), a side spreading module (4), a capping unit (5), a flattening module (6), a collecting unit (7) and a processing control platform (8), characterized in that: The main body (1) comprises a seat body (11), a detection platform (12) is installed on the upper side of the seat body (11), a sink groove (13) is provided on the inner side of the upper part of the detection platform (12), a slide groove (14) penetrating the detection platform (12) is provided on the right side of the sink groove (13), a lifting part (15) is installed on the inner side of the sink groove (13), a conducting part (16) is installed on the inner side of the slide groove (14), the positioning part (2) is installed on the upper side of the seat body (11), the white light interference thickness measurement sensor (3) is installed on the positioning part (2), and the side expansion module (4) comprises a rail shell (41) located on the right side of the sink groove (13) and fixed on the upper side of the detection platform (12), and a plate surface of the upper side of the rail shell (41) is provided A through rail (42), wherein the inner side of the rail housing (41) is rotatably connected to a positive and negative threaded rod (43) with its two ends exposed front and rear, the front end of the positive and negative threaded rod (43) is fixedly connected to an adjusting wheel (44), a group of two linked rail members (45) are installed on the positive and negative threaded rod (43), the linked rail member (45) comprises a rail block (451) which is spirally connected to the thread of the positive and negative threaded rod (43), a guide member (452) is fixedly connected to the left side of the rail block (451), a metal back member (453) which is longitudinally arranged is slidably connected to the outer side of the guide member (452), a magnetic pressure block (46) is adsorbed on the left side of the metal back member (453), and the upper side of the rail block (451) is fixedly connected to a magnetic pressure block (46) which is located on the inner side of the through rail (42). The finger block (454) is fixedly connected to a scale bar (47) aligned with the through rail (42) in the upper groove of the rail housing (41), and a group of two guide reset parts (48) are symmetrically installed on the left end surface of the rail housing (41). The pressure cover part (5) is installed on the outer upper side of the side expansion module (4), and the flattening module (6) is installed at the pressure cover part (5). A processing control platform (8) is arranged on the right side of the main body (1). The pressure cover part (5) includes a rotating cover (51) rotatably connected to the exposed ends of the positive and negative threaded rods (43), and the right plate of the rotating cover (51) is provided with a cover opening (54) on both sides, and the inner side of the cover opening (54) is slidably connected to a pull-out plate (55), and the flattening module (6) includes a A track plate (61) is provided between the cover opening (54) and fixedly connected to the inner wall of the rotating cover (51); a base frame (62) is slidably connected to the inner side of the track plate (61); the base frame (62) comprises a track frame (621) slidably connected to the inner wall of the track plate (61); guide bars (622) are fixedly connected to the front and rear ends of the track frame (621); a through groove (624) is provided on the inner side of the T block of the track frame (621); a rotating hole (623) is provided on the upper side of the through groove (624); an implementation portion (63) is installed on the left side of the base frame (62); the implementation portion (63) comprises a roller frame (631); guide grooves (632) slidably connected to the guide bars (622) are provided on the front and rear sides of the roller frame (631);The inner side of the roller frame (631) is rotatably connected to a rotating roller (633), the right side of the roller frame (631) is fixedly connected to a first magnetic block (634) located inside the through slot (624), the base frame (62) is mounted with an adjusting portion (64), the adjusting portion (64) comprises a connecting rod (641) rotatably connected to the inner wall of the rotating hole (623), the lower end of the connecting rod (641) is fixedly connected to a fixing sleeve (642) located inside the through slot (624), the inner side of the fixing sleeve (642) is fixedly connected to a second magnetic block (643), the upper end of the connecting rod (641) passes through the track plate (61) and the rotating cover (51) and is fixedly connected to a pinching block (644).

2. The device for detecting thickness uniformity of a nanofiber membrane according to claim 1, characterized in that: The positioning part (2) is composed of an X / Y axis conveyor, a bracket, a frame plate and a cylinder. The white light interferometric thickness sensor (3) is mounted on the lower end of the cylinder push rod of the positioning part (2). The white light interferometric thickness sensor (3) is mounted on the upper side of the detection platform (12). The white light interferometric thickness sensor (3), the positioning part (2) and the processing control platform (8) are electrically connected.

3. The device for detecting thickness uniformity of a nanofiber membrane according to claim 1, characterized in that: The outer end surface of the track block (451) is slidably connected to the inner wall of the track housing (41); the finger blocks (454) are arranged close to the scale bar (47); the upper end surface of the scale bar (47) is lower than the upper end surface of the track housing (41); a gap is arranged between the lower end of the track plate (61) and the track housing (41); a gap is arranged between the implementation portion (63), the base portion (62) and the track housing (41); and the right chamfer of the upper end surface of the track housing (41) is rounded.

4. The device for detecting thickness uniformity of a nanofiber membrane according to claim 1, characterized in that: The outer diameter of the first magnetic block (634) is smaller than the inner diameter of the through slot (624); the magnetic directions of the first magnetic block (634) and the second magnetic block (643) are opposite; a convex strip group is provided on the right end surface of the pull-out plate (55); a damping ring is provided on the right end surface of the pull-out plate (55); and a pressure block is installed on the inner side of the damping ring of the pull-out plate (55).

5. The device for detecting thickness uniformity of a nanofiber membrane according to claim 1, characterized in that: The lifting part (15) comprises a lifting shell (151) located at the lower side of the metal back part (453) and the magnetic pressure block (46); a group of multiple air holes (152) are opened on the left end surface of the lifting shell (151); an air inlet (153) is opened on the lower side of the lifting shell (151); the conducting part (16) comprises a guide shell (161); a splicing interface (162) is opened on the upper side of the guide shell (161); a fixing frame (163) is connected to the right side of the guide shell (161); a filter plate (164) is fixedly connected to the inner side of the fixing frame (163); a right plate of the rotating cover (51) is opened, which is connected to the through rail (42) after rotation. The mounting position (52) is aligned with the mounting position (52), the inner side of which is fixedly connected to a filter strip (53), the upper notch of the rotating cover (51) is connected to an exhaust shell (56), the upper side of the exhaust shell (56) is installed with an exhaust fan (57), the collecting portion (7) comprises an outer shell (71) fixedly connected to the left end surface of the seat body (11), the upper opening of the outer shell (71) is fixedly connected to a ventilation hood (72), the upper side of the outer shell (71) is connected to a hose (73), the outer side of the hose (73) away from the outer shell (71) is fixedly connected to a connecting sleeve (74), and the inner side of the outer shell (71) is slidably connected to an inner shell (75).

6. The device for detecting thickness uniformity of a nanofiber membrane according to claim 5, characterized in that: The upper end surface of the lifting shell (151) and the upper end surface of the detection platform (12) are arranged in the same plane. The lifting shell (151), the detection platform (12) and the metal back part (453) are made of the same material. The guide reset part (48) is composed of an upper base rail, a lower push part and a reset spring. The reset spring of the guide reset part (48) is arranged between the upper base rail and the lower push part. The upper base rail of the guide reset part (48) is fixedly connected to the left end surface of the rail shell (41). The lower push part of the guide reset part (48) is fixedly connected to the upper end surface of the lifting shell (151). A spacing is arranged between the upper end surfaces of the magnetic suction pressure block (46) and the metal back part (453) and the upper end surface of the rail shell (41). The inner diameter of the connecting sleeve (74) is the same as the outer diameter of the exhaust fan (57). The exhaust fan (57) is electrically connected to the processing control platform (8).

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