A nanofiber membrane quality detection device

Abstract

The application belongs to the technical field of nanofiber membranes, and particularly relates to a nanofiber membrane quality detection device, which comprises a box body, a laser emitter, a receiving plate, a data processor, and a transmission mechanism. The laser emitter is fixedly connected to the inside of the box body. The receiving plate is fixedly connected to the inside of the box body. The data processor is electrically connected to the receiving plate. The receiving plate cooperates with the laser emitter. The transmission mechanism comprises a motor, a driving wheel, and an initial wheel. The motor is fixedly connected to the box body. The driving wheel is fixedly connected to the shaft of the motor and rotationally connected to the box body. The initial wheel cooperates with the driving wheel and is rotationally connected to the box body. The scheme solves the problem of continuously detecting fiber membranes.

Description

Technical Field

[0001] This invention belongs to the field of nanofiber membrane technology, and specifically relates to a nanofiber membrane quality testing device. Background Technology

[0002] Nanofibers are linear materials with a diameter on the nanometer scale and a relatively large length, possessing a certain aspect ratio. Additionally, fibers modified by incorporating nanoparticles into ordinary fibers are also called nanofibers. There are many methods for manufacturing nanofibers, such as stretching, template synthesis, self-assembly, microphase separation, and electrospinning. Among these, electrospinning is widely used due to its advantages of simple operation, wide applicability, and relatively high production efficiency. In the production of nanofiber membranes, the thickness of the nanofiber membrane needs to be measured to ensure membrane quality.

[0003] A currently available device for detecting the thickness uniformity of nanofiber membranes, with publication number CN113465519B, includes a worktable. The worktable has a bottom frame on its outer bottom wall, and a data analyzer on the inner bottom wall of the frame. The worktable has a mounting plate on its outer top wall, with a polarizer and a polarizer mounted on one side of the mounting plate. A mounting groove is formed on the outer top wall of the worktable, and a second stepper motor is mounted on the inner side of one side of the groove. A lead screw is attached to one end of the output shaft of the second stepper motor, and a slider is threaded onto the outer wall of the lead screw. A first stepper motor is mounted on the outer top wall of the slider, and a placement plate is attached to one end of the output shaft of the first stepper motor. A light-shielding mechanism is also provided on the outer top wall of the worktable. This invention allows all detection points to uniformly cover the nanofiber membrane. By comparing the thickness of the nanofiber membrane at different detection points, the thickness uniformity of the nanofiber membrane can be determined, making it very convenient to use.

[0004] However, some problems exist: 1. The device uses a placement tray for testing, and the sample needs to be replaced before testing the next sample, so continuous testing is not possible. 2. The device uses a polarizer and analyzer to measure the thickness of the fiber membrane by reflection, which is prone to deviation during reflection. Summary of the Invention

[0005] This solution provides a nanofiber membrane quality testing device to address the problem of not being able to perform continuous testing.

[0006] This solution provides a nanofiber membrane quality testing device, including a housing; a laser emitter: the laser emitter is fixedly connected to the inside of the housing; a receiving plate: the receiving plate is fixedly connected to the inside of the housing; a data processor: the data processor is electrically connected to the receiving plate; and the receiving plate cooperates with the laser emitter; a transmission mechanism: the transmission mechanism includes: a motor: the motor is fixedly connected to the housing; a drive wheel: the drive wheel is fixedly connected to the shaft of the motor, and the drive wheel is rotatably connected to the housing; and an initial wheel: the initial wheel cooperates with the drive wheel, and the initial wheel is rotatably connected to the housing.

[0007] The principle of this scheme is as follows: the active wheel and the initial wheel are kept parallel. The operator rolls the fiber membrane onto the initial wheel and then fixes the starting section of the fiber membrane onto the active wheel, so that the fiber membrane is kept parallel to the laser emitter. Then the door of the chamber is closed to keep the inside of the chamber sealed and prevent external dust from affecting the detection values.

[0008] The motor is started, driving the drive wheel to rotate at a set angle, causing the initial wheel to rotate and the fiber membrane to move. The motor is then stopped, the drive wheel stops, and the laser emitter is activated. The laser beam passes through the limiting membrane and strikes the receiving plate, which transmits the data to the data processor. The thickness of the fiber membrane is calculated based on the energy lost as the laser passes through it. After the measurement, the laser emitter is turned off, the motor is started, and the drive wheel rotates at the set angle. The test is repeated, and this process is repeated.

[0009] The beneficial effects of this scheme are: by using an active wheel and an initial wheel, the fiber membrane can be switched, and multiple samples can be continuously detected without the need to cut the samples.

[0010] Furthermore, the system also includes a controller, to which both the motor and the laser emitter are electrically connected. The operator starts the motor via the controller, causing the portion of the fiber membrane to be inspected to rotate between the laser emitter and the receiving plate. The controller then stops the motor, and simultaneously starts the laser emitter to perform thickness detection. After the inspection is complete, the controller stops the laser emitter, and the motor starts again, moving the next portion of the fiber membrane to be inspected between the laser emitter and the receiving plate. This mechanism achieves automation, saving labor costs.

[0011] Furthermore, it also includes a tensioning mechanism, which includes an initial shaft and an iron ball. The initial wheel is rotatably connected to the housing via the initial shaft. The initial shaft and the initial wheel are fixedly coaxially. The initial shaft has an eccentric groove, and the iron ball is placed in the groove.

[0012] Typically, a motor is installed on both the drive wheel and the initial wheel, and the two motors are kept synchronized. However, this method has two problems: 1. Two motors increase costs. 2. The two motors need to be synchronized, but in reality, many factors can cause the motors to be out of sync, leading to stretching or loosening of the fiber membrane. A single motor, due to inertia, can also cause the fiber membrane to loosen. In this solution, when the motor stops, the drive wheel stops rotating, and the initial wheel also stops rotating. However, due to inertia, the initial wheel will rotate a little further, causing the fiber membrane to loosen. This results in unevenness of the fiber membrane in the detection section, leading to inaccurate thickness readings. Increasing the friction of the initial wheel to counteract inertia would cause the drive wheel to exert even greater tension on the fiber membrane when driving the initial wheel, potentially leading to membrane breakage.

[0013] This mechanism sets the motor to rotate at a fixed angle. Each time the motor stops, the iron ball in the initial wheel is located in the lower left part. When the motor stops, the iron ball in the initial wheel will counteract inertia through gravity, causing the initial wheel to rotate slightly, thus keeping the fiber membrane taut and flat. This mechanism uses only one motor, saving costs and solving the problem of inaccurate measurements caused by fiber membrane relaxation.

[0014] Furthermore, it also includes an electromagnet, the initial shaft and the initial wheel are made of plastic, the electromagnet is fixedly connected to the housing, the electromagnet cooperates with the iron ball, and the electromagnet is electrically connected to the controller.

[0015] Because the rotation is at a set angle, when the motor stops, the iron ball will be at the bottom, and then, due to inertia, it will be positioned on the lower left side of the initial shaft. At this point, the controller activates the electromagnet, which attracts the iron ball, causing it to rotate the initial shaft slightly and tighten the fiber membrane. The initial shaft and initial wheel are made of plastic to prevent the electromagnet from attracting the initial wheel and rendering the iron ball ineffective. This mechanism uses an electromagnet to attract and pull the initial wheel to tighten it, which is more stable than relying on gravity for rotation.

[0016] Furthermore, the iron ball is a hollow iron ball (13), and the center of gravity of the iron ball and the initial axis (12) is the center of the initial axis (12).

[0017] Because the initial wheel's center of gravity is offset, it will swing due to inertia during rotation, easily causing the fiber membrane to become entangled and jammed. In this mechanism, the center of gravity of the iron ball and the initial wheel is located at the center of the initial wheel, thus preventing swinging during rotation. Simultaneously, when the motor stops, the iron ball is located on the lower left side of the initial shaft. At this point, the controller activates the electromagnet, which attracts the iron ball, causing it to rotate the initial shaft slightly and tighten the fiber membrane. This mechanism solves the problem of swinging during tensioning.

[0018] Furthermore, it also includes a triggering mechanism, which includes a cam, a push plate, a push switch, and a spring. The cam is coaxially connected to the drive wheel through a reducer. One end of the spring is fixedly connected to the push plate, and the other end is fixedly connected to the housing. The push plate cooperates with the cam. The push switch is fixedly connected to the housing and cooperates with the push plate. The push switch is electrically connected to the controller.

[0019] Since multiple groups need to be tested, continuous manual judgment and testing are not feasible. To reduce labor costs, when the controller starts the motor, the drive wheel rotates, which in turn drives the cam to rotate. At this time, the cam pushes the push plate to move, causing the push plate to press the switch. The press switch sends an electrical signal to the controller, which stops the motor and simultaneously starts the laser emitter and energizes the electromagnet. The energized electromagnet causes the iron ball to rotate and tighten under magnetic force. At the same time, the laser emitter performs the test. Since the laser is unstable for the first two seconds after the laser emitter starts, the values ​​of the first two seconds are usually discarded. The initial rotation and tightening also takes 1-2 seconds, so the initial rotation does not affect the laser emitter's test.

[0020] After the laser inspection is completed, the controller will control the motor to continue rotating. When the push plate triggers the press switch again, it will stop. This process will repeat for multiple sets of automatic inspections.

[0021] Furthermore, it also includes a guide rail, which is fixedly connected to the housing, and the push plate is slidably connected to the guide rail. The guide rail prevents the push plate from shifting, which would cause the push plate to fail to contact the push switch.

[0022] Furthermore, it also includes a temperature sensor, which is fixedly connected to the housing and located near the laser emitter. The temperature sensor is electrically connected to the controller. The laser emitter is prone to overheating during prolonged use, leading to damage. This device uses a temperature sensor to detect the laser emitter's temperature. When the temperature is too high, the temperature sensor sends an electrical signal, and the controller stops the laser emitter from operating. Attached Figure Description

[0023] Figure 1 This is a state diagram of a nanofiber membrane quality testing device during testing.

[0024] Figure 2 This is a diagram showing the state of a nanofiber membrane quality testing device when the motor is stopped.

[0025] Figure 3 This is an enlarged view of a nanofiber membrane quality testing device.

[0026] The reference numerals in the accompanying drawings include: 1. Housing; 2. Back panel; 3. Temperature sensor; 4. Laser emitter; 5. Column; 6. Receiver plate; 7. Drive wheel; 8. Cam; 9. First auxiliary wheel; 10. Second auxiliary wheel; 11. Initial wheel; 12. Initial shaft; 13. Hollow iron ball; 14. Electromagnet; 15. Guide rail; 16. Push plate; 17. Press switch; 18. Fixed column; 19. Spring. Detailed Implementation

[0027] The basics are as follows: Figure 1 As shown:

[0028] This solution provides a nanofiber membrane quality testing device, including a housing 1. The housing 1 adopts a sealed structure to minimize the contact between the fiber membrane and the external environment. A temperature sensor 3 is installed at the top inside the housing 1 to detect the temperature of the laser emitter 4 and the overall internal temperature. A back plate 2 is fixed in the center of the housing 1, and the laser emitter 4 is fixed on the back plate 2. A receiving plate 6 is fixed inside the housing 1 by a column 5, and the receiving plate 6 is located below the laser emitter 4 and parallel to the laser emitter 4.

[0029] The transmission mechanism includes a drive wheel 7, an initial wheel 11, a first auxiliary wheel 9, and a second auxiliary wheel 10. The drive wheel 7, the first auxiliary wheel 9, and the second auxiliary wheel 10 are all rotatably connected to the back plate 2. The initial wheel 11 is rotatably connected to the back plate 2 via an initial shaft 12. The initial wheel 11 and the initial shaft 12 are coaxially fixed. The drive wheel 7 and the initial wheel 11 are on the same horizontal line. The first auxiliary wheel 9 and the second auxiliary wheel 10 are on the same horizontal line and are located above the drive wheel 7 and the initial wheel 11. The first auxiliary wheel 9 and the second auxiliary wheel 10 keep the fiber membrane parallel to the laser emitter 4.

[0030] A groove is provided at the edge of the initial shaft 12, and an iron ball is fixed in the groove. The iron ball is a hollow iron ball 13, and the center of gravity of the initial shaft 12 and the iron ball as a whole is located at the center of the initial shaft 12. The electromagnet 14 is fixed on the back plate 2, and the electromagnet 14 is located directly below the initial wheel 11, and the electromagnet 14 is parallel to the receiving plate 6. The laser emitter 4, the electromagnet 14, and the motor are all electrically connected to the controller.

[0031] As attached Figure 3 As shown:

[0032] The drive wheel 7 is coaxially connected to a cam 8, and a reducer is provided between the cam 8 and the drive wheel 7. When the cam 8 rotates to a set angle, it pushes the push plate 16 and presses the push plate 16 against the push switch 17. One end of the spring 19 is fixedly connected to the push plate 16, and the other end is fixedly connected to the housing 1. The push plate 16 is slidably connected on the guide rail 15, and the guide rail 15 is fixed to the housing 1. The push switch 17 is fixed to the fixing post 18, and the fixing post 18 is fixed to the housing 1. The push switch 17 is used to control the start and stop of the motor, electromagnet 14, and laser emitter 4.

[0033] As attached Figure 1 , Figure 2 , Figure 3 As shown:

[0034] The principle of this scheme is as follows: the operator rolls the fiber membrane onto the initial wheel 11, then wraps the starting section of the fiber membrane around the first auxiliary wheel 9 and the second auxiliary wheel 10 and fixes it onto the active wheel 7, so that the fiber membrane is parallel to the laser emitter 4. Then the door of the box 1 is closed to keep the inside of the box 1 sealed and prevent external dust from affecting the detection values.

[0035] The controller starts the motor, which drives the drive wheel 7 to rotate at a set angle, causing the first auxiliary wheel 9 to rotate. The first auxiliary wheel 9 drives the second auxiliary wheel 10 to rotate, thereby causing the initial wheel 11 to rotate. After the fiber membrane moves a set distance, the cam 8 rotates at a set angle, causing the push plate 16 to press the switch 17, and the controller controls the motor to stop.

[0036] Simultaneously, the controller activates laser emitter 4 and electromagnet 14. Electromagnet 14 attracts the iron ball, causing the initial shaft 12 to rotate and taut the fiber membrane. Laser emitter 4 also begins detection, measuring the thickness. After detection, the controller starts the motor, repeating this process continuously. Multiple samples are then continuously tested.

[0037] The beneficial effects of this solution are as follows: 1. This solution allows for switching of the fiber membrane via the active wheel 7 and the initial wheel 11, enabling continuous detection of multiple samples without the need for special sample cutting. 2. It solves the problem of fiber membrane relaxation and unevenness caused by inertia. 3. It achieves automation.

[0038] Example 2

[0039] The difference from Example 1 is that the motor is a servo motor that can rotate, but the rest are the same.

[0040] Each time the electromagnet 14 attracts the iron ball to rotate, it not only tightens the fiber membrane but also drives the drive wheel 7 to rotate slightly. This ensures that the current measurement includes a small portion of the previous value, allowing the accuracy of the measurement to be determined by comparing the current and previous values. This improves the accuracy of thickness measurement.

[0041] The above are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A nanofiber membrane quality detection device, comprising: Box (1); Laser emitter (4): The laser emitter (4) is fixedly connected to the inside of the housing (1); Receiver plate (6): The receiver plate is fixedly connected to the inside of the housing (1), and the receiver plate (6) cooperates with the laser emitter (4); Data processor: The data processor is electrically connected to the receiving board (6); Its characteristic is that it further includes: Transmission mechanism: The transmission mechanism includes: Motor: The motor is fixedly connected to the housing (1); Drive wheel (7): The drive wheel (7) is fixedly connected to the shaft of the motor, and the drive wheel (7) is rotatably connected to the housing (1); Initial wheel (11): The initial wheel (11) cooperates with the drive wheel (7), and the initial wheel (11) is rotatably connected to the housing (1); It also includes a tensioning mechanism, which includes an initial shaft (12) and an iron ball. The initial wheel (11) is rotatably connected to the box (1) through the initial shaft (12). The initial shaft (12) and the initial wheel (11) are coaxially fixed. The initial shaft (12) is eccentrically provided with a groove, and an iron ball is provided in the groove. It also includes a triggering mechanism, which includes a cam (8), a push plate (16), a push switch (17) and a spring (19). The cam (8) and the drive wheel (7) are coaxially connected through a reducer. One end of the spring (19) is fixedly connected to the push plate (16) and the other end is fixedly connected to the housing (1). The push plate (16) cooperates with the cam (8). The push switch (17) is fixedly connected to the housing (1) and cooperates with the push plate (16). The push switch (17) is electrically connected to the controller.

2. The nanofiber membrane quality detection device according to claim 1, characterized in that, It also includes a controller, and the motor and laser emitter (4) are both electrically connected to the controller.

3. The nanofiber membrane quality detection device according to claim 1, characterized in that, It also includes an electromagnet (14), the initial shaft (12) and the initial wheel (11) are made of plastic, the electromagnet (14) is fixedly connected to the housing (1), the electromagnet (14) cooperates with the iron ball, and the electromagnet (14) is electrically connected to the controller.

4. The nanofiber membrane quality detection device according to claim 3, characterized in that, The iron ball is a hollow iron ball (13), and the center of gravity of the iron ball and the initial axis (12) is the center of the initial axis (12).

5. The nanofiber membrane quality detection device according to claim 1, characterized in that, It also includes a guide rail (15), which is fixedly connected to the housing (1), and the push plate (16) is slidably connected to the guide rail (15).

6. The nanofiber membrane quality detection device according to claim 2, characterized in that, It also includes a temperature sensor (3), which is fixedly connected to the housing (1) and is close to the laser emitter (4). The temperature sensor (3) is electrically connected to the controller.

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