Nanofiber membrane quality detection device

Abstract

The invention belongs to the technical field of nanofiber membranes, and particularly relates to a nanofiber membrane quality detection device which comprises a box body, the laser transmitter is fixedly connected with the interior of the box body; the receiving plate is fixedly connected with the interior of the box body; the data processor is electrically connected with the receiving plate; the receiving plate is matched with the laser transmitter; the transmission mechanism comprises a motor and a transmission mechanism; the motor is fixedly connected with the box body; the driving wheel is fixedly connected with a shaft of the motor, and the driving wheel is rotationally connected with the box body; the initial wheel is matched with the driving wheel, and the initial wheel is rotationally connected with the box body. According to the scheme, the problem of continuous detection of the fiber membrane is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of nanofiber membranes, and in particular relates to a nanofiber membrane quality detection device. Background Art

[0002] Nanofiber refers to a linear material with a nanometer diameter and a relatively long length with a certain aspect ratio. In addition, the fiber modified by filling nanoparticles into ordinary fibers is also called nanofiber. There are many methods to make nanofibers, such as stretching, template synthesis, self-assembly, microphase separation, electrospinning, etc. Among them, electrospinning is widely used due to its simple operation, wide application range, and relatively high production efficiency. In the production process of nanofiber membranes, in order to ensure the quality of the fiber membranes, the thickness of the nanofiber membranes needs to be tested.

[0003] The currently available announcement number CN113465519B is a device for detecting the thickness uniformity of nanofiber membranes, comprising a workbench, a bottom outer wall of the workbench is provided with a bottom frame, and a data analyzer is provided on the bottom inner wall of the bottom frame, a mounting plate is provided on the top outer wall of the workbench, and a polarizer and an analyzer are provided on one side outer wall of the mounting plate, a mounting groove is provided on the top outer wall of the workbench, and a second stepper motor is provided on one side inner wall of the mounting groove, a screw rod is provided at one end of the output shaft of the second stepper motor, and a slider is threadedly connected to the outer wall of the screw rod, a first stepper motor is provided on the top outer wall of the slider, and a placement plate is provided at one end of the output shaft of the first stepper motor, and a light shielding mechanism is provided on the top outer wall of the workbench. This invention enables all detection points to evenly cover the fiber membrane, and by comparing the fiber membrane thickness at different detection points, the thickness uniformity of the nanofiber membrane can be obtained, which is very convenient to use.

[0004] However, there are some problems: 1. The device uses a placement plate for placement testing, and the sample needs to be replaced to test the next sample, so continuous testing is not possible. 2. The device uses a polarizer and an analyzer for reflection to measure the thickness of the fiber film. This measurement method is prone to deviation during reflection. Summary of the invention

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

[0006] The present invention provides a nanofiber membrane quality detection device, comprising 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 comprises: a motor: the motor is fixedly connected to the housing; a driving wheel: the driving wheel is fixedly connected to the shaft of the motor, and the driving wheel is rotatably connected to the housing; an initial wheel: the initial wheel cooperates with the driving wheel, and the initial wheel is rotatably connected to the housing.

[0007] The principle of this scheme is that the driving wheel and the initial wheel remain parallel, the operator rolls the fiber membrane onto the initial wheel, and then fixes the starting section of the fiber membrane on the driving wheel so that the fiber membrane remains parallel to the laser emitter, and then closes the door of the box to keep the inside of the box airtight to prevent external dust from affecting the detection value.

[0008] Start the motor, the motor drives the driving wheel to rotate the set angle, so that the initial wheel rotates and the fiber membrane moves. Stop the motor, the driving wheel stops, start the laser transmitter, the laser passes through the limit membrane and shoots to the receiving board, the receiving board transmits the data to the data processor, and the thickness of the fiber membrane is calculated based on the energy lost by the laser passing through the fiber membrane. After the measurement, turn off the laser transmitter, start the motor, make the driving wheel rotate the set angle, test again, and repeat this process.

[0009] The beneficial effect of this solution is that: this solution allows the fiber membrane to be switched through the active wheel and the initial wheel, and multiple samples can be continuously tested without deliberately cutting the samples.

[0010] Furthermore, it also includes a controller, and the motor and the laser emitter are electrically connected to the controller. The operator controls the motor to start through the controller, so that the fiber membrane of the part to be detected rotates between the laser emitter and the receiving plate, and then the controller controls the motor to stop, and the laser emitter starts at the same time to perform thickness detection. After the detection is completed, the controller controls the laser emitter to stop, and the motor starts, so that the next part of the fiber membrane to be detected moves between the laser emitter and the receiving plate. This mechanism realizes automation and saves labor costs.

[0011] Furthermore, it also includes a tightening mechanism, which includes an initial shaft and an iron ball. The initial wheel is rotatably connected to the box body through the initial shaft. The initial shaft and the initial wheel are fixedly arranged coaxially. The initial shaft is eccentrically provided with a groove, and the iron ball is arranged in the groove.

[0012] Generally, a motor is set on the driving wheel and the initial wheel respectively, and then the two motors are kept synchronized. However, there are two problems with this method: 1. Two motors increase the cost. 2. The two motors need to be kept synchronized, but in reality many factors can cause the motors to be out of sync, which will cause the fiber membrane to be pulled or loosened. And one motor will cause the fiber membrane to relax due to inertia problems. In this solution, when the motor stops, the driving wheel stops rotating, and the initial wheel will also stop rotating. However, due to the effect of inertia, the initial wheel will rotate a little more, causing the fiber membrane to relax, which will make the fiber membrane of the detection part uneven, resulting in inaccurate detected thickness. Increasing the friction of the initial wheel to offset the inertia will cause the driving wheel to drive the initial wheel to rotate, which will produce greater pulling force on the fiber membrane, which can easily cause the fiber membrane to break.

[0013] This mechanism sets the motor to rotate at a fixed angle. Every time the motor stops, the iron ball in the initial wheel is located at the lower left part. In this way, when the motor stops, the iron ball in the initial wheel will offset the inertia through gravity, causing the initial wheel to rotate partly, so that the fiber membrane remains tight and flat. This mechanism uses one motor, saving costs and solving the problem of inaccurate measurement caused by loose fiber membrane.

[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 box, the electromagnet cooperates with the iron ball, and the electromagnet is electrically connected to the controller.

[0015] Since the rotation is a set angle, when the motor stops, the iron ball will be at the bottom, and then under the action of inertia, it will be located at the lower left part of the initial axis. At this time, the controller controls the electromagnet to start, and the electromagnet attracts the iron ball, so that the iron ball drives the initial axis to rotate a part, tightening the fiber membrane. The initial axis and the initial wheel are made of plastic to prevent the electromagnet from adsorbing the initial wheel, causing the iron ball to fail to work. This mechanism uses the electromagnet to absorb and pull the initial wheel to tighten, which is more stable than rotating by gravity.

[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] Due to the offset of the initial wheel's center of gravity, the initial wheel will have inertial swing when rotating, which can easily cause the fiber membrane to be entangled and stuck. The overall center of gravity of the iron ball and the initial wheel of this mechanism is at the center of the initial wheel, so that the initial wheel will not swing when rotating. At the same time, when the motor stops, the iron ball is at the lower left part of the initial shaft. At this time, the controller controls the electromagnet to start, and the electromagnet attracts the iron ball, so that the iron ball drives the initial shaft to rotate part of the way, tightening the fiber membrane. This mechanism solves the problem of swinging of the tensioning mechanism.

[0018] Furthermore, it also includes a trigger mechanism, which includes a cam, a push plate, a push switch and a spring. The cam is coaxially connected to the driving 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 box body, the push plate cooperates with the cam, the push switch is fixedly connected to the box body, and the push switch cooperates with the push plate, and the push switch is electrically connected to the controller.

[0019] Since multiple groups need to be tested, manual judgment cannot be used all the time for testing. In order to reduce labor costs, when the controller controls the motor to start, the driving wheel rotates, and the rotation of the driving wheel will drive the cam to rotate. At this time, the cam will push the push plate to move, which just makes the push plate squeeze the press switch. The press switch sends an electrical signal to the controller, and the controller controls the motor to stop. At the same time, it controls the start of the laser transmitter and the power of the electromagnet. The power of the electromagnet causes the iron ball to rotate and tighten under the magnetic force, and the laser transmitter performs detection at the same time. Since the laser is unstable in the first two seconds after the laser transmitter is started, the value of the first two seconds is generally discarded. It just so happens that the initial round rotation and tightening also takes 1-2 seconds, so the initial round rotation will not affect the laser transmitter detection.

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

[0021] Furthermore, it also includes a guide rail, which is fixedly connected to the box body, and the push plate is slidably connected to the guide rail. The guide rail can prevent the push plate from deviating, resulting in the push plate failing to contact the push switch.

[0022] Furthermore, it also includes a temperature sensor, which is fixedly connected to the box and close to the laser emitter, and is electrically connected to the controller. The laser emitter is prone to overheating after long-term use, causing damage to the laser emitter. This mechanism detects the temperature of the laser emitter through the temperature sensor. When the temperature is too high, the temperature sensor sends an electrical signal, and the controller controls the laser emitter to stop cloud operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a state diagram of a nanofiber membrane quality detection device during detection. Figure 2 This is a state diagram of a nanofiber membrane quality detection device when the motor stops. Figure 3 This is an enlarged view of a nanofiber membrane quality detection device.

[0024] The figure marks in the specification include: 1. box body; 2. back plate; 3. temperature sensor; 4. laser transmitter; 5. column; 6. receiving plate; 7. driving 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. push switch; 18. fixing column; 19. spring. DETAILED DESCRIPTION

[0025] Basically as attached Figure 1 As shown: This solution provides a nanofiber membrane quality detection device, including a box 1, which adopts a closed structure to minimize the contact between the fiber membrane and the external environment. A temperature sensor 3 is provided on the top of the box 1 to detect the laser emitter 4 and the overall internal temperature. A back plate 2 is fixed in the center of the box 1, and the laser emitter 4 is fixed on the back plate 2. A receiving plate 6 is fixed in the box 1 through a column 5, and the receiving plate 6 is located below the laser emitter 4, and the receiving plate 6 is parallel to the laser emitter 4.

[0026] The transmission mechanism includes a driving wheel 7, an initial wheel 11, a first auxiliary wheel 9 and a second auxiliary wheel 10. The driving 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 through an initial shaft 12. The initial wheel 11 and the initial shaft 12 are fixedly arranged coaxially. The driving 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 the first auxiliary wheel 9 and the second auxiliary wheel 10 are located above the driving wheel 7 and the initial wheel 11, and the first auxiliary wheel 9 and the second auxiliary wheel 10 keep the fiber membrane parallel to the laser emitter 4.

[0027] 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 kept parallel to the receiving plate 6. The laser transmitter 4, the electromagnet 14 and the motor are all electrically connected to the controller.

[0028] As attached Figure 3 As shown: The driving wheel 7 is also coaxially connected to a cam 8, and a speed reducer is provided between the cam 8 and the driving wheel 7. When the cam 8 rotates to a set angle, it pushes the push plate 16 and squeezes the push plate 16 to the press 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 box 1. The push plate 16 is slidably connected on the guide rail 15, and the guide rail 15 is fixed on the box 1. The press switch 17 is fixed on the fixed column 18, and the fixed column 18 is fixed on the box 1. The press switch 17 is used to control the start and stop of the motor, the electromagnet 14 and the laser transmitter 4.

[0029] As attached Figure 1 , Figure 2 , Figure 3 As shown: The principle of this scheme is that the operator rolls the fiber membrane onto the initial wheel 11, then passes the starting section of the fiber membrane around the first auxiliary wheel 9 and the second auxiliary wheel 10 and fixes it on the driving wheel 7, so that the fiber membrane remains parallel to the laser emitter 4, and then closes the door of the box 1 to keep the inside of the box 1 airtight to prevent external dust from affecting the detection value.

[0030] The controller starts the motor, and the motor drives the driving wheel 7 to rotate a set angle, so that the first auxiliary wheel 9 rotates, and the first auxiliary wheel 9 drives the second auxiliary wheel 10 to rotate, thereby rotating the initial wheel 11. After the fiber membrane moves a set distance, the cam 8 rotates a set angle at the same time, so that the push plate 16 squeezes the press switch 17, and the controller controls the motor to stop.

[0031] At the same time, the controller starts the laser emitter 4 and the electromagnet 14. The electromagnet 14 attracts the iron ball, causing the initial axis 12 to rotate and tighten the fiber membrane. The laser emitter 4 also starts to detect and measure the thickness. After the detection is completed, the controller controls the motor to start, and it goes back and forth. Multiple samples are completed for continuous detection.

[0032] The beneficial effects of this solution are: 1. This solution enables the fiber membrane to be switched through the active wheel 7 and the initial wheel 11, and multiple samples can be continuously tested without cutting the samples. 2. The problem of loose and uneven fiber membranes caused by inertia is solved. 3. Automation is achieved.

[0033] Example 2 The difference from the first embodiment is that the motor is a rotatable servo motor, and the rest is the same.

[0034] Each time the electromagnet 14 attracts the iron ball to rotate, in addition to tightening the fiber membrane, it also drives the driving wheel 7 to rotate a little, so that the value measured this time includes a small part of the last time, so that the accuracy of this measurement can be judged by whether the value is consistent with the last time, thereby improving the accuracy of measuring thickness.

[0035] The above are only embodiments of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is 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 structure 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 nanofiber membrane quality detection device, comprising: Box (1); Laser emitter (4): the laser emitter (4) is fixedly connected to the interior of the box (1); Receiving plate (6): the receiving plate is fixedly connected to the inside of the box (1), and the receiving plate (6) cooperates with the laser transmitter (4); Data processor: the data processor is electrically connected to the receiving board (6); It is characterized by further comprising: Transmission mechanism: The transmission mechanism includes: Motor: the motor is fixedly connected to the box (1); Driving wheel (7): the driving wheel (7) is fixedly connected to the shaft of the motor, and the driving wheel (7) is rotatably connected to the box body (1); Initial wheel (11): the initial wheel (11) cooperates with the driving wheel (7), and the initial wheel (11) is rotatably connected to the box body (1).

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

3. A nanofiber membrane quality detection device according to claim 2, characterized in that: It also comprises a tightening mechanism, the tightening mechanism comprising an initial shaft (12) and an iron ball, the initial wheel (11) is rotatably connected to the box body (1) via the initial shaft (12), the initial shaft (12) and the initial wheel (11) are coaxially fixedly arranged, the initial shaft (12) is eccentrically provided with a groove, and the iron ball is arranged in the groove.

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

5. A nanofiber membrane quality detection device according to claim 4, 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).

6. A nanofiber membrane quality detection device according to claim 5, characterized in that: The invention also includes a trigger mechanism, which includes a cam (8), a push plate (16), a push switch (17) and a spring (19); the cam (8) is coaxially connected to the driving wheel (7) 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 box (1); the push plate (16) cooperates with the cam (8); the push switch (17) is fixedly connected to the box (1), and the push switch (17) cooperates with the push plate (16); and the push switch (17) is electrically connected to the controller.

7. A nanofiber membrane quality detection device according to claim 6, characterized in that: It also includes a guide rail (15), wherein the guide rail (15) is fixedly connected to the box body (1), and the push plate (16) is slidably connected to the guide rail (15).

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

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