Acoustic signal-based high-performance fiber monofilament friction factor testing system

Abstract

The utility model discloses a high-performance fiber monofilament friction factor testing system based on sound signals, which comprises a signal processor, a controller, a motor, a sample carrying table, a friction roller and a sound acquisition device, the signal processor is connected with the controller, the controller is respectively connected with the motor and the sound acquisition device, and the motor is connected with the friction roller. The motor is connected with the sample carrying table; a fiber monofilament to be tested is hung on the friction roller, one end of the fiber monofilament to be tested is connected with a first weight, and the other end of the fiber monofilament to be tested is connected with the sample carrying table. According to the device, the friction factors of the high-performance fiber monofilaments under two contact working conditions of friction between the filaments and a carrier and friction between the filaments can be measured, and the friction behaviors of the fiber filaments of different types and different finenesses can be analyzed under various conditions of different loads, different moving speeds and the like.

Description

Technical Field

[0001] The utility model relates to a friction factor testing device, in particular to a high-performance fiber monofilament friction factor testing system based on acoustic signals, and belongs to the technical field of textile testing equipment. Background Art

[0002] Friction, as a mechanical behavior throughout the entire process of manufacturing, storage, and service of multi-scale textile reinforcements, affects and determines the quality parameters of multi-scale textile reinforcements, and in turn restricts the mechanical bearing properties of the reinforcements themselves and the resulting textile composites. Existing research shows that after carbon fiber tows undergo friction and wear throughout the weaving process, the tensile strength of the composite materials prepared as reinforcements is reduced by about 12% compared to the composite materials prepared from carbon fiber tows that have not undergone the weaving process. For glass fiber tows, the attenuation of tensile strength caused by friction and wear during the weaving process can be as high as 30%, and the attenuation of tensile strength of the prepared composite materials can also be as high as 20%. Therefore, research on the friction behavior of fibers and textiles, as well as their testing methods, has important scientific and application value.

[0003] Fiber is the basic unit of yarn and fabric, and the study of its friction behavior is an important basis and prerequisite for understanding the friction behavior of yarn and fabric. The traditional method of testing friction factor is to use force sensor to measure the friction force when relative motion occurs, based on Amontons law (i.e. F = μN ) Method for calculating friction factor. The diameter of high performance fiber filament represented by carbon / glass fiber is usually 10 -6 ~10 -5 The tensile force of a fiber monofilament is usually measured in cN. The small size and low tensile force bring many challenges to the measurement of friction coefficient using force sensors.

[0004] First, for forces on the centinetonewton (cN) scale, standard force sensors are prone to problems such as high signal noise and low resolution, resulting in an inability to accurately capture changes in the friction force on the fiber surface. Secondly, the diameter of a fiber monofilament is very small, and its friction behavior is greatly affected by the microscopic contact state. Traditional force sensors can often only capture the average friction force and have difficulty reflecting contact changes at the microscopic level, which in turn leads to distorted measurement results and an inability to reflect the true characteristics of fiber friction. Thirdly, fiber friction changes are very small and rapid, and the response speed of most force sensors is relatively slow, making it difficult to keep up with the dynamic changes in the fiber friction process, resulting in an inability to reflect changes in the friction factor in real time, especially in the measurement of instantaneous friction force when static friction occurs.

[0005] Therefore, in order to solve the above technical problems, it is necessary to provide an innovative high-performance fiber monofilament friction factor testing system to overcome the above-mentioned defects in the prior art. Utility Model Content

[0006] Purpose of the utility model: In order to solve the above-mentioned problems of the prior art, the purpose of the utility model is to provide a high-performance fiber monofilament friction factor testing system based on acoustic signals, which can realize the measurement of the friction factor of the fiber monofilament under two contact conditions: friction between the fiber and the carrier and friction between the fibers. It can also realize the analysis of the friction behavior of fiber filaments of different types and different finenesses under various conditions such as different loads and different moving speeds, and provide a method for the study of the inter-filament friction mechanism of high-performance fibers such as carbon fiber / glass fiber.

[0007] Technical solution: The utility model discloses a high-performance fiber monofilament friction factor testing system based on acoustic signals, comprising a signal processor, a controller, a motor, a sample carrier, a friction roller, and a sound collection device. The signal processor is connected to the controller, which is respectively connected to the motor and the sound collection device, and the motor is connected to the sample carrier.

[0008] The fiber monofilament to be tested is hung on the friction roller, one end of the fiber monofilament to be tested is connected to the first weight, and the other end is connected to the sample loading platform.

[0009] In some embodiments, the friction roller includes a metal round roller and a fiber roller for inter-filament friction testing.

[0010] In some embodiments, the fiber roller for inter-filament friction testing includes a roller body, a rectangular pressing block, and a fastening metal ring.

[0011] In some embodiments, the roller body is provided with rectangular grooves along its axial direction, and a through hole is provided at the bottom of one of the rectangular grooves.

[0012] In some embodiments, the sound collecting device is a microphone, and the microphone is installed near the contact area between the fiber monofilament to be tested and the friction roller.

[0013] In some embodiments, the controller is used to control the operation of the motor and the collection and storage of friction acoustic emission signals.

[0014] In some embodiments, the processor is used to process the friction acoustic emission signal and analyze the friction coefficient value.

[0015] Beneficial effects: The high-performance fiber monofilament friction factor testing system based on acoustic signals of the utility model can realize the measurement of the friction factor of high-performance fiber monofilaments such as carbon fiber / glass fiber, effectively simulate the friction behavior under two contact modes: the friction between the fiber and the carrier and the friction between the fibers, and can realize the analysis of the friction behavior between the fiber filaments of different types and different finenesses under various conditions such as different loads and different moving speeds, providing a method for the study of the friction mechanism of high-performance fiber monofilaments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of an embodiment of the utility model;

[0017] Figure 2 This is an exploded view of a fiber roller for testing the inter-filament friction coefficient according to one embodiment of the present invention;

[0018] Figure 3 This is a partial cross-sectional view of a fiber roller for testing the inter-filament friction coefficient according to one embodiment of the present invention;

[0019] Figure 4 It is a flow chart of the detection process of an embodiment of the present utility model. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0021] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "inside" and "outside" are the directions or positional relationships shown, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0023] The present invention will be further described in detail below through specific implementation examples and in conjunction with the accompanying drawings. Example 1

[0024] like Figure 1 As shown, a high-performance fiber monofilament friction factor testing system based on acoustic signals includes a signal processor 1, a controller 2, a motor 3, a sample carrier 4, a friction roller 6 and a sound collection device 7. The signal processor 1 is connected to the controller 2, the controller 2 is connected to the motor 3 and the sound collection device 7 respectively, and the motor 3 is connected to the sample carrier 4;

[0025] The fiber monofilament 5 to be tested is hung on the friction roller 6 , one end of the fiber monofilament 5 to be tested is connected to the first weight 8 , and the other end is connected to the sample loading platform 4 .

[0026] Among them, the sound collection device 7 collects the friction sound emission signal between the fiber monofilament 5 to be tested and the friction roller 6; the controller 2 controls the operation of the motor 3 and collects and stores the friction sound emission signal; the signal processor 1 processes the collected sound emission signal and analyzes the friction factor value. Example 2

[0027] like Figure 1 As shown, a high-performance fiber monofilament friction factor testing system based on acoustic signals includes a signal processor 1, a controller 2, a motor 3, a sample carrier 4, a friction roller 6 and a sound collection device 7. The signal processor 1 is connected to the controller 2, the controller 2 is connected to the motor 3 and the sound collection device 7 respectively, and the motor 3 is connected to the sample carrier 4;

[0028] The fiber monofilament 5 to be tested is hung on the friction roller 6 , one end of the fiber monofilament 5 to be tested is connected to the first weight 8 , and the other end is connected to the sample loading platform 4 .

[0029] Among them, the sound collection device 7 collects the friction sound emission signal between the fiber monofilament 5 to be tested and the friction roller 6; the controller 2 controls the operation of the motor 3 and collects and stores the friction sound emission signal; the signal processor 1 processes the collected sound emission signal and analyzes the friction factor value.

[0030] In this embodiment, the friction roller 6 includes a metal round roller and a fiber roller for inter-filament friction testing. Figure 2 As shown, the fiber roller for inter-filament friction testing includes a roller body 611 , a first rectangular pressing block 612 a , a second rectangular pressing block 612 b , and a fastening metal ring 613 .

[0031] like Figure 2 and 3As shown, the roller body 611 is provided with a first rectangular groove 6111a and a second rectangular groove 6111b along its axial direction, wherein a through hole 6112 is provided at the bottom of the second rectangular groove 6111b.

[0032] like Figure 2 and Figure 3 The preparation process of the fiber roller for the inter-filament friction test in this application is as follows:

[0033] 1) Take a fiber filament sample and place one end of it in a smooth first rectangular groove 6111a on a roller 611. Then, place a first rectangular pressing block 612a in the groove to press the fiber. Then, take a fastening metal ring 613 and wrap it around the first rectangular pressing block 612a and the roller to secure one end of the fiber filament sample.

[0034] 2) Pass the other end of the above-mentioned fiber filament sample through the through hole 6112 at the bottom of the second rectangular groove 6111b opened on the roller body 611, and hang a second weight 618 at its end to tension the fiber filament sample with a certain tension. Then, take the second rectangular pressing block 612b and place it in the second rectangular groove 6111b to press the fiber, and use the fastening metal ring 613 to encircle the aforementioned second rectangular pressing block 612b and the roller body. Finally, remove the second weight 618 to complete the preparation of the fiber roller for testing the inter-filament friction coefficient.

[0035] In this embodiment, Figure 1 As shown, the sound collecting device 7 uses a microphone, which is installed near the contact area between the fiber monofilament to be tested and the friction roller to collect the friction sound. Example 3

[0036] like Figure 4 As shown, the detection process of the high-performance fiber monofilament friction factor testing system based on acoustic signals of the present application includes:

[0037] Step 1: Collect the friction acoustic emission signal during the friction test;

[0038] Step 2: Pre-process the collected friction acoustic emission signal by filtering and noise reduction, and then generate a spectrum through Fourier transform;

[0039] Step 3: Input the spectrum graph into the friction factor prediction model trained by the convolutional neural network to realize the prediction of the friction factor.

[0040] The high-performance fiber monofilament friction factor testing system based on acoustic signals of the utility model can realize the measurement of the friction factor of high-performance fiber monofilaments such as carbon fiber / glass fiber, effectively simulate the friction behavior under two contact modes: the friction between the fiber and the carrier and the friction between the fibers, and can realize the analysis of the friction behavior between the fiber filaments of different types and different finenesses under various conditions such as different loads and different moving speeds, providing a method for the study of the friction mechanism of high-performance fiber monofilaments.

[0041] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A high-performance fiber monofilament friction factor testing system based on acoustic signals, characterized by: It includes a signal processor, a controller, a motor, a sample carrier, a friction roller and a sound collection device, wherein the signal processor is connected to the controller, the controller is respectively connected to the motor and the sound collection device, and the motor is connected to the sample carrier; The fiber monofilament to be tested is hung on the friction roller, one end of the fiber monofilament to be tested is connected to the first weight, and the other end is connected to the sample loading platform.

2. The high-performance fiber monofilament friction factor testing system based on acoustic signals according to claim 1, characterized in that: The friction roller comprises a metal round roller and a fiber roller for inter-filament friction testing.

3. The high-performance fiber monofilament friction factor testing system based on acoustic signals according to claim 2, characterized in that: The fiber roller for inter-filament friction testing comprises a roller body, a rectangular pressing block and a fastening metal ring.

4. The high-performance fiber monofilament friction factor testing system based on acoustic signals according to claim 3, characterized in that: The roller body is provided with rectangular grooves along its axial direction, and a through hole is provided at the bottom of one of the rectangular grooves.

5. The high-performance fiber monofilament friction factor testing system based on acoustic signals according to claim 1, characterized in that: The sound collecting device adopts a microphone, and the microphone is installed near the contact area between the fiber monofilament to be tested and the friction roller.

6. The high-performance fiber monofilament friction factor testing system based on acoustic signals according to claim 1, characterized in that: The controller is used to control the operation of the motor and the collection and storage of friction sound emission signals.

7. The high-performance fiber monofilament friction factor testing system based on acoustic signals according to claim 1, characterized in that: The processor is used to process the friction acoustic emission signal and analyze the friction coefficient value.

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