A textile quietness performance testing device and testing method

Abstract

The application discloses a kind of textile mute performance testing device and testing method, including the sample to be tested is fixed in mute box;Test sample is rubbed by test assembly;The sound signal generated when rubbing is collected using acquisition device, and the sound signal collected is transmitted to control unit for analysis and processing, and the mute performance data of test sample is obtained.The blank that mute performance of textile cannot be directly detected in prior art is made up, and the mute performance of textile can be directly evaluated.Through the test of different product categories, the sound pressure level difference between various textiles can be found, providing a reference basis for the evaluation standard of sound pressure level of different categories of textiles.Through the detection of the application, certain reference value can be provided for enterprises to improve the mute performance of textile.The mute performance under different temperature environments can also be detected, providing certain basis for the sound generated by friction of textile under different environmental conditions.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of textile testing, in particular to a textile quietness performance testing device and method. BACKGROUND

[0002] With the development of the textile industry, the performance testing of textiles has been increasingly valued. The quietness performance of textiles refers to the size of the sound produced during the process of friction, deformation, etc. of textiles, which is of great significance in the fields of high-end clothing, automotive interiors, home goods, etc. Currently, textile performance testing mainly focuses on physical properties, chemical properties, and comfort properties, etc., while the testing and research of quietness performance are relatively less.

[0003] In terms of dry and wet wear resistance performance testing of textiles, the existing technology has developed a complete testing method. For example, CN119394825A discloses a textile dry and wet wear resistance performance testing method and device, which realizes the measurement of the dry and wet properties of textiles in multiple aspects by testing the wear resistance performance of textiles in dry and wet states. The method includes adjusting the test environment to a dry state, recording the initial state data of the textile sample; performing different degrees of immersion treatment on multiple groups of textile samples, recording the initial immersion state data; simulating the stress conditions in actual use; performing reciprocating friction and recording the friction frequency and wear condition; and finally processing and analyzing the data.

[0004] In terms of textile touch characteristic testing, CN107764662A proposes a textile touch characteristic testing device and method, which realizes the rapid measurement of multiple physical characteristics of textiles by converting the compression characteristics, bending and twisting characteristics, and surface friction characteristics of textiles into the collection of signals of each channel pressure sensor. The device includes a test assembly, a transmission mechanism, a torsional force tray, and a support, which can comprehensively measure the compression characteristics, surface friction characteristics, bending and twisting characteristics, and heat transfer characteristics of textiles.

[0005] In terms of fabric sound absorption and sound insulation performance testing, CN104215694A discloses a fabric sound absorption and sound insulation testing device, which includes a sound emitting device and a soundproof box device composed of a first soundproof box and a second soundproof box. The device places the fabric to be tested between the two soundproof boxes, uses the sound emitting device to emit sound, and then uses the sound receiving device arranged in the two soundproof boxes to receive the sound, thereby testing the sound absorption and sound insulation performance of the fabric. CN204228665U also proposes a similar fabric sound absorption and sound insulation testing device, which effectively realizes the testing of the noise reduction performance of the fabric and overcomes the disadvantages of high cost and inconvenience of professional testing devices.

[0006] In terms of textile color fastness rating, CN116609261A discloses a textile color fastness rating method, which tests the dry and wet state of textile samples in different directions, and uses image processing technology to extract rating features for rating. This method takes into account the influence of textile line direction on test results, and by reciprocating along the textile line direction, more dyed particles are dispersed onto the standard rubbing cloth, improving the accuracy of the test.

[0007] However, the prior art has the following problems:

[0008] 1. Existing textile acoustic tests mainly focus on sound absorption and insulation performance, such as the test devices described in CN104215694A and CN204228665U, which mainly measure the absorption and insulation ability of textiles to external sound, rather than the sound characteristics generated by textiles during friction and deformation.

[0009] 2. Existing textile physical performance test methods, such as the dry and wet wear resistance test of CN119394825A and the touch property test of CN107764662A, although involve the friction process, do not focus on the sound signals and their characteristics generated during the friction process.

[0010] 3. There is a lack of a test method and device that can quantitatively analyze the sound generated during the friction process of textiles in a simulated actual use environment.

[0011] 4. There is no method in the prior art that takes into account the characteristics of human ear sound perception in the evaluation system of textile quiet performance, which cannot accurately reflect the quiet comfort of textiles in actual use.

[0012] Therefore, there is an urgent need for a method and device that can accurately test the quiet performance of textiles to meet the needs of high-end textile development and quality control.

[0013] Therefore, we designed a textile quiet performance test device and test method to solve these problems. SUMMARY

[0014] To solve the problem that there is no method and device for testing the quiet performance of textiles at present, and the existing textile acoustic test method only measures the sound absorption ability of textiles, which cannot evaluate the quiet performance of textiles, the technical problem is solved, and the technical effect of comparing and intuitively evaluating the quiet performance of textiles is achieved, providing reference for the evaluation standard of sound pressure level of different categories of textiles;

[0015] The application provides a kind of textile mute performance testing device, including mute box, control unit is arranged on the mute box, fixed assembly and tensioning assembly are arranged in the mute box, the fixed assembly and the tensioning assembly are fixed and tensioned to test sample by mutual cooperation, collection device is arranged between the fixed assembly and the tensioning assembly, the collection device is below test sample, test assembly is arranged on the mute box, the test assembly is above the collection device, the test assembly and the collection device are electrically connected with the control unit.

[0016] Preferably, the fixed assembly includes a fixing frame, a fixing cylinder and a supporting plate are fixedly arranged on the fixing frame, a pressing plate is fixedly arranged on the output end of the fixing cylinder, and the pressing plate is above the supporting plate; the tensioning assembly includes a supporting frame, an installation plate is fixedly arranged on the supporting frame, a sliding rail and a supporting wheel are arranged on the installation plate, a sliding plate is slidably arranged on the sliding rail, a clamping cylinder and a clamping plate are hingedly connected to the sliding plate, the output end of the clamping cylinder is hingedly connected to the clamping plate, and a rope is fixedly arranged on the sliding plate, and a free end of the rope is fixedly connected to a tensioning hammer after passing through the supporting wheel.

[0017] Preferably, the test assembly includes a connecting frame fixedly arranged on the mute box, a rotating shaft and a motor are arranged on the connecting frame, the rotating shaft is rotatably connected to the connecting frame through a mute bearing, the output end of the motor is connected to the rotating shaft through a clutch, a connecting rod is further fixedly arranged on the rotating shaft, a friction pendulum is fixedly arranged on the free end of the connecting rod, a releaser is further fixedly arranged on the mute box at one side of the connecting frame, and the releaser is connected to the connecting rod in cooperation.

[0018] Preferably, an adjusting assembly is further arranged in the mute box, the adjusting assembly is electrically connected with the control unit, and is used for adjusting temperature, humidity and air pressure in the mute box.

[0019] Preferably, the mute box includes an installation bin and a test bin, the fixed assembly, the tensioning assembly, the collection device and the test assembly are located in the test bin, the adjusting assembly is located in the installation bin, and the output end of the adjusting assembly is connected to the test bin.

[0020] Preferably, the adjusting assembly includes a temperature regulator, a humidity regulator, an air pump, a temperature sensor, a humidity sensor and an air pressure sensor, the temperature regulator, the humidity regulator and the air pump are fixedly arranged in the installation bin, and the output ends thereof are connected to the test bin, and the temperature sensor, the humidity sensor and the air pressure sensor are fixedly arranged in the test bin.

[0021] The application provides a testing method based on the textile mute performance testing device, and specific steps include the following.

[0022] S1, fixing the sample to be tested in the mute box includes connecting one side of the sample to be tested to the fixing assembly and connecting the other side to the tensioning assembly for tensioning through the tensioning assembly; after the sample is fixed, the environmental parameters in the mute box can be adjusted through the adjusting assembly to simulate the actual use scenario; wherein the environmental parameters include temperature, humidity and air pressure.

[0023] S2, when the testing assembly is used to rub the sample, the rubbing pendulum swings freely through the free-fall movement mode to rub the surface of the sample to be tested.

[0024] S3, the sound signals generated during rubbing are collected by the collecting device, and the collected sound signals are transmitted to the control unit for analysis and processing to obtain the mute performance data of the sample, including:

[0025] S3-1, A-weighted filtering is applied to the original time domain signal to filter out low frequency and ultrahigh frequency components that are not sensitive to human ears; A-weighted filtering is used to simulate the characteristics of human ears that are sensitive to medium and low frequency sounds and not sensitive to high frequency and low frequency sounds; the sound pressure signals of different frequencies are "weighted and attenuated" through the filtering network, so that the measurement result is closer to the actual perceived loudness of human ears, and the correction formula is:

[0026]

[0027] Among them, is the A-weighted sound pressure level (dB(A)); is the sound pressure level (dB) of a certain frequency ; is the A-weighted attenuation value corresponding to the frequency ;

[0028] S3-2, the instantaneous square sound pressure value of the filtered signal is calculated, and the calculation method is:

[0029]

[0030] Among them, is the instantaneous sound pressure after A-weighted filtering; is the time variable;

[0031] S3-3, the root mean square value of the square sound pressure in time T is calculated, and the calculation formula is:

[0032]

[0033] Among them, T is the integration time, is the average effective sound pressure in T seconds;

[0034] S3-4. Convert the root mean square sound pressure level to the sound pressure level using the following formula:

[0035]

[0036] in, Sound pressure level, The reference sound pressure level is 20 MPa.

[0037] S3-5. For the frequency domain signal after A-weighted filtering, the loudness is calculated using the Tzvik loudness model:

[0038] S3-5-1. Divide the frequency domain signal according to the critical frequency band;

[0039] S3-5-2. Calculate the sound pressure level of each critical frequency band and obtain the loudness contribution of that frequency band by combining the frequency band weighting function.

[0040] S3-5-3. The total loudness is obtained using the formula for calculating total loudness:

[0041]

[0042] in, For total loudness, For the first Partial loudness of a critical frequency band The exponents 0.23 and 4.348 are constants representing the number of critical frequency bands involved in the calculation, derived from the nonlinear perception of multi-frequency loudness by the human ear;

[0043] S3-6. The total loudness is used as the noise reduction performance data of the test sample.

[0044] The advantages and positive effects of this invention are:

[0045] 1. This invention fills the gap in the existing technology where the noise reduction performance of textiles cannot be directly tested, and can intuitively evaluate the noise reduction performance of textiles.

[0046] 2. Through tests on different product types, it can be found that the sound pressure levels of various textiles are different. The data can be objectively classified and summarized, providing a reference for the evaluation standards of sound pressure levels of different types of textiles.

[0047] 3. The testing methods of this invention can provide valuable reference for enterprises to improve the noise reduction performance of textiles.

[0048] 4. This invention can detect the noise reduction performance under different temperature environments, providing a certain basis for the sound generated by the friction of textiles under different environmental conditions. Attached Figure Description

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0050] Figure 1 is the overall structure schematic diagram of the present application Figure One ;

[0051] Figure 2 is the overall structure schematic diagram of the present application Figure Two ;

[0052] Figure 3 is the internal structure schematic diagram of the present application

[0053] Figure 4 is the internal structure schematic diagram of the present application

[0054] Figure 5 is the structure enlarged view of A in Figure 3 ;

[0055] Figure 6 is the structure enlarged view of B in Figure 4 ;

[0056] Figure 7 is the flow schematic diagram of the present application.

[0057] The following is the explanation of the reference signs:

[0058] 1, mute box; 11, test bin; 12, bin door; 13, installation bin; 14, universal wheel; 2, fixed assembly; 21, fixed frame; 22, fixed cylinder; 23, supporting plate; 24, pressing plate; 3, tensioning assembly; 31, supporting frame; 32, mounting plate; 33, slide rail; 34, sliding plate; 35, clamping cylinder; 36, clamping plate; 37, supporting wheel; 38, rope; 39, tensioning hammer; 4, acquisition device; 5, test assembly; 51, connecting frame; 52, rotating shaft; 53, mute bearing; 54, connecting rod; 55, friction pendulum; 56, clutch; 57, motor; 58, releaser; 6, control unit; 7, test sample; 8, adjusting assembly; 81, humidity regulator; 82, temperature regulator; 83, temperature sensor; 84, humidity sensor; 85, air pressure sensor; 86, air pump. DETAILED DESCRIPTION

[0059] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can be explicitly or implicitly included one or more. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0060] In the description of the present application, it needs to be understood that the terms "installation", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0061] The present application will be further described below in conjunction with the drawings:

[0062] Example one:

[0063] As Figures 1-6 shown, a textile mute performance testing device, comprising a mute box 1, the mute box 1 is provided with a control unit 6. The mute box 1 includes installation bin 13 and test bin 11, fixed assembly 2, tensioning assembly 3, acquisition device 4 and test assembly 5 are located in the test bin 11.

[0064] The fixed assembly 2 and the tensioning assembly 3 are arranged in the mute box 1. The fixed assembly 2 comprises a fixing frame 21, a fixed cylinder 22 and a supporting plate 23 are fixedly arranged on the fixing frame 21, a pressing plate 24 is fixedly arranged on the output end of the fixed cylinder 22, and the pressing plate 24 is located above the supporting plate 23. The fixed cylinder 22 works under the control of the control unit 6, and the test sample 7 is pressed tightly on the supporting plate 23 by controlling the downward movement of the pressing plate 24, so as to ensure that one end of the test sample 7 is stable.

[0065] The tensioning assembly 3 comprises a support frame 31, the support frame 31 is fixedly provided with a mounting plate 32, the mounting plate 32 is provided with a sliding rail 33 and a supporting wheel 37, a sliding plate 34 is slidably arranged on the sliding rail 33, a clamping air cylinder 35 and a clamping plate 36 are hingedly arranged on the sliding plate 34, the output end of the clamping air cylinder 35 is hingedly connected with the clamping plate 36, a rope 38 is fixedly arranged on the sliding plate 34, and a tensioning hammer 39 is fixedly connected with the free end of the rope 38 after passing through the supporting wheel 37. The tensioning assembly 3 controls the clamping plate 36 to clamp the other end of the test sample 7 through the clamping air cylinder 35, and at the same time, the rope 38 drives the sliding plate 34 to slide on the sliding rail 33 through the gravity action of the tensioning hammer 39, so that a constant tension is applied to the test sample 7, and the test sample 7 is ensured to be in a flat tensioning state, and the test precision is improved.

[0066] The fixing assembly 2 and the tensioning assembly 3 cooperate to fix and tension the test sample 7, and a collecting device 4 is arranged between the fixing assembly 2 and the tensioning assembly 3, and the collecting device 4 is located below the test sample 7. The collecting device 4 is used for collecting and recording sound signals generated in the test process, and transmitting the signals to the control unit 6 for analysis and processing.

[0067] A test assembly 5 is arranged on the mute box 1 above the collecting device 4, and the test assembly 5 and the collecting device 4 are electrically connected with the control unit 6. The test assembly 5 comprises a connecting frame 51 fixedly arranged on the mute box 1, the connecting frame 51 is provided with a rotating shaft 52 and a motor 57, the rotating shaft 52 is rotatably connected with the connecting frame 51 through a mute bearing 53, the output end of the motor 57 is connected with the rotating shaft 52 through a clutch 56, and a connecting rod 54 is fixedly arranged on the rotating shaft 52, the connecting rod 54 is made of ferromagnetic material, a friction pendulum 55 is fixedly arranged on the free end of the connecting rod 54, a releaser 58 is also fixedly arranged on the mute box 1 on one side of the connecting frame 51, the releaser 58 is a solenoid, and can generate magnetism after being electrified. When the motor 57 drives the rotating shaft 52 to rotate through the clutch 56, the connecting rod 54 rotates with the rotating shaft 52 to a horizontal state, at this time, the connecting rod 54 contacts the releaser 58, the releaser 58 generates magnetism after being electrified, and can attract the connecting rod 54, so that the releaser 58 is connected with the connecting rod 54. When the test assembly 5 works, the motor 57 drives the rotating shaft 52 to rotate, and drives the connecting rod 54 to move, after the releaser 58 releases the connecting rod 54, the friction pendulum 55 swings under the action of gravity and contacts and rubs the test sample 7, to generate friction sound, and the sound is collected by the collecting device 4 and transmitted to the control unit 6 for analysis. The use of the mute bearing 53 effectively reduces the noise generated when the rotating shaft 52 rotates, and improves the accuracy of the test.

[0068] The mute box 1 is further provided with an adjusting assembly 8 electrically connected with the control unit 6 and used for adjusting the temperature, humidity and air pressure in the mute box 1. Specifically, the mute box 1 comprises a mounting bin 13 and a test bin 11, the test bin 11 is located above the mounting bin 13, a bin door 12 is hinged to the test bin 11, the bin door 12 can block the external sound from entering the test bin 11 when closed, avoiding the interference of the external sound on the internal test, and the mounting bin 13 is provided with universal wheels 14 at the bottom.

[0069] The adjusting assembly 8 is located in the mounting bin 13 and has an output end connected with the test bin 11, the adjusting assembly 8 comprises a temperature regulator 82, a humidity regulator 81, an air pump 86, a temperature sensor 83, a humidity sensor 84 and an air pressure sensor 85, the temperature regulator 82, the humidity regulator 81 and the air pump 86 are fixed in the mounting bin 13 and have output ends connected with the test bin 11, and the temperature sensor 83, the humidity sensor 84 and the air pressure sensor 85 are fixed in the test bin 11. The adjusting assembly 8 precisely controls the test environment through the temperature regulator 82, the humidity regulator 81 and the air pump 86, simultaneously monitors the environmental parameters in the test bin 11 through various sensors in real time and feeds back the data to the control unit 6, the control unit 6 adjusts the environmental parameters according to the feedback data, for example, when the temperature sensor 83 detects that the temperature in the test bin 11 is too low, the temperature regulator 82 can be controlled to work, the air flow in the test bin 11 is heated and circulated to heat the test bin 11; when the humidity in the test bin 11 is too large, the temperature regulator 82 can also be used for dehumidification, and when the air pressure is too high or too low, the air pump 86 can be used for adjustment; so as to ensure that the test is carried out under standard environmental conditions and improve the reliability and comparability of the test results.

[0070] The textile quietness performance testing device works, first open the door 12, one end of the test sample 7 is placed on the fixed assembly 2 of the fixed plate 23, through the fixed cylinder 22 control the pressing plate 24 down, with the fixed plate 23 cooperate and fix the sample; Then the other end of the sample is clamped through the clamping plate 36 on the tensioning assembly 3, and a constant tension is applied through the tensioning hammer 39 to make the sample in tension; Then close the door 12, then control the adjusting assembly 8 through the control unit 6 to adjust the temperature and humidity and air pressure parameters in the test chamber 11 to the preset conditions; At the same time, start the test assembly 5, make the motor 57 drive the rotating shaft 52 through the clutch 56, when the connecting rod 54 contacts the releaser 58, the releaser 58 is powered on to adsorb the connecting rod 54, at this time the clutch 56 is disconnected, the releaser 58 loses magnetism when the test is powered off, the friction pendulum 55 will fall and contact the sample to produce friction sound, the collection device 4 collects the sound signal and transmits it to the control unit 6 for analysis and processing, so as to obtain the quietness performance index of the textile. The whole test process is carried out in a closed quiet environment, which effectively eliminates the interference of external noise, ensures the accuracy and reliability of the test results.

[0071] The clutch 56 can realize the connection and separation of the motor 57 and the rotating shaft 52, and cooperate with the motor 57 to realize the automatic lifting of the friction pendulum 55. The releaser 58 adopts magnetic attraction fixing mode and controls release and adsorption by power on and off, which can reduce the noise interference of internal components during operation, so that the test result is more accurate

[0072] As shown in Figure 7 The method for testing the quietness performance of textiles by using the above-mentioned textile quietness performance testing device includes the following steps:

[0073] S1, fix the test sample 7 in the quiet box 1. Specifically, one side of the test sample 7 is connected with the fixed assembly 2, and the other side is connected with the tensioning assembly 3 and then tensioned by the tensioning assembly 3. After the test sample 7 is fixed, the environmental parameters in the quiet box 1 can be adjusted by the adjusting assembly to simulate the actual use scene. The environmental parameters include temperature, humidity and air pressure. In this way, the test sample 7 can be kept flat and stable during the test, and the test environment can simulate various conditions that the textile may encounter in actual use, improving the accuracy and practicality of the test results.

[0074] S2, friction the test sample 7 by the test assembly 5. In this process, the friction pendulum 55 swings freely by free fall. The friction pendulum 55 swings naturally under the action of gravity and produces friction with the surface of the fixed test sample 7. This way can simulate the friction condition that the textile may encounter in actual use, and the sound produced is closer to the actual application scene.

[0075] S3, the sound signal generated during friction is collected by the collecting device 4, and the collected sound signal is transmitted to the control unit 6 for analysis and processing to obtain the mute performance data of the test sample 7. Specifically, the following sub-steps are included:

[0076] S3-1, A-weighted filtering is applied to the original time domain signal to filter out low frequency and ultrahigh frequency components that are not sensitive to human ears. A-weighted filtering is used to simulate the characteristics of human ears that are sensitive to medium and low frequency sounds and not sensitive to high frequency and low frequency sounds. Through the filtering network, the sound pressure signal of different frequencies is "weighted and attenuated", so that the measurement result is closer to the actual perceived loudness of human ears. The correction formula is:

[0077]

[0078] Among them, A-weighted sound pressure level (dB(A)); The sound pressure level (dB) of a certain frequency The A-weighted attenuation value corresponding to the frequency The A-weighted attenuation value corresponding to the frequency

[0079] S3-2, calculate the instantaneous square sound pressure value of the filtered signal, the calculation method is:

[0080]

[0081] Among them, A-weighted filtered instantaneous sound pressure; Time variable;

[0082] S3-3, calculate the root mean square value of the square sound pressure in time T, the calculation formula is:

[0083]

[0084] Among them, T is the integration time, The average effective sound pressure in T seconds;

[0085] S3-4, convert the root mean square sound pressure to sound pressure level, the calculation formula is:

[0086]

[0087] Among them, Sound pressure level, The reference sound pressure is a constant 20MPA;

[0088] S3-5, for the A-weighted filtered frequency domain signal, calculate the loudness using the Zwicker loudness model:

[0089] S3-5-1, divide the frequency domain signal according to the critical frequency band; ​

[0090] S3-5-2. Calculate the sound pressure level of each critical frequency band and obtain the loudness contribution of that frequency band by combining the frequency band weighting function.

[0091] S3-5-3. The total loudness is obtained using the formula for calculating total loudness:

[0092]

[0093] in, For total loudness, For the first Partial loudness of a critical frequency band The exponents 0.23 and 4.348 are constants representing the number of critical frequency bands involved in the calculation, derived from the nonlinear perception of multi-frequency loudness by the human ear;

[0094] S3-6. The total loudness is used as the noise reduction performance data for test sample 7. The lower the total loudness value, the better the noise reduction performance of the textile, that is, the less noise perceived by the human ear is generated during friction.

[0095] The above steps allow for a comprehensive evaluation of the sound characteristics generated by textiles during friction, transforming complex acoustic signals into intuitive indicators of noise reduction performance. This provides a scientific and objective testing method for the noise reduction performance of textiles. This method considers the auditory characteristics of the human ear, resulting in test results that are closer to actual human perception and thus have high practical value.

[0096] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A textile quietness performance testing apparatus, characterized by: The application relates to a mute box (1) which is provided with a control unit (6), a fixing assembly (2) and a tensioning assembly (3) are arranged in the mute box (1), the fixing assembly (2) and the tensioning assembly (3) cooperate to fix and tension a test sample (7), a collecting device (4) is arranged between the fixing assembly (2) and the tensioning assembly (3), the collecting device (4) is located below the test sample (7), a test assembly (5) is arranged on the mute box (1) and located above the collecting device (4), and the test assembly (5) and the collecting device (4) are electrically connected with the control unit (6). The test assembly (5) comprises a connecting frame (51) fixedly arranged on the mute box (1), a rotating shaft (52) and a motor (57) are arranged on the connecting frame (51), the rotating shaft (52) is rotationally connected with the connecting frame (51) through mute bearings (53), the output end of the motor (57) is connected with the rotating shaft (52) through a clutch (56), a connecting rod (54) is further fixedly arranged on the rotating shaft (52), a friction pendulum (55) is fixedly arranged at the free end of the connecting rod (54), a releaser (58) is further fixedly arranged on the mute box (1) at one side of the connecting frame (51), and the releaser (58) is connected with the connecting rod (54) in a matched mode.

2. A device for testing the sound attenuation properties of a textile according to claim 1, characterized in that: The fixing assembly (2) comprises a fixing frame (21), a fixing cylinder (22) and a supporting plate (23) are fixedly arranged on the fixing frame (21), a pressing plate (24) is fixedly arranged at the output end of the fixing cylinder (22), and the pressing plate (24) is located above the supporting plate (23). The tensioning assembly (3) comprises a supporting frame (31), an installation plate (32) is fixedly arranged on the supporting frame (31), a sliding rail (33) and a supporting wheel (37) are arranged on the installation plate (32), a sliding plate (34) is slidingly arranged on the sliding rail (33), a clamping cylinder (35) and a clamping plate (36) are hingedly arranged on the sliding plate (34), the output end of the clamping cylinder (35) is hingedly connected with the clamping plate (36), a rope (38) is further fixedly arranged on the sliding plate (34), and the free end of the rope (38) is fixedly connected with a tensioning hammer (39) after being wound around the supporting wheel (37).

3. The textile sound performance testing apparatus of claim 1, wherein: An adjusting assembly (8) is further arranged in the mute box (1), the adjusting assembly (8) is electrically connected with the control unit (6) and used for adjusting the temperature, humidity and air pressure in the mute box (1).

4. A device for testing the sound attenuation properties of a textile according to claim 3, wherein: The mute box (1) comprises an installation bin (13) and a test bin (11), the fixing assembly (2), the tensioning assembly (3), the collecting device (4) and the test assembly (5) are located in the test bin (11), the adjusting assembly (8) is located in the installation bin (13), and the output end of the adjusting assembly (8) is connected with the test bin (11).

5. A device for testing the sound attenuation properties of a textile according to claim 4, wherein: The adjusting assembly (8) comprises a temperature regulator (82), a humidity regulator (81), an air pump (86), a temperature sensor (83), a humidity sensor (84) and an air pressure sensor (85), the temperature regulator (82), the humidity regulator (81) and the air pump (86) are fixed in the mounting bin (13) respectively, and the output ends are all communicated with the test bin (11), and the temperature sensor (83), the humidity sensor (84) and the air pressure sensor (85) are all fixed in the test bin (11).

6. Test method for textile quietness performance testing apparatus according to any one of claims 1 to 5, characterized in that, The method comprises the following steps: S1, fixing the sample (7) to be tested in the mute box (1); S2, rubbing the test sample (7) by the test assembly (5); S3, collecting the sound signal generated during rubbing by the collecting device (4), and transmitting the collected sound signal to the control unit (6) for analysis and processing to obtain the mute performance data of the test sample (7).

7. The test method of a textile quietness performance test apparatus according to claim 6, characterized in that, Fixing the sample (7) to be tested in the mute box (1) comprises connecting one side of the sample (7) to be tested to the fixing assembly (2), connecting the other side to the tensioning assembly (3), and then tensioning by the tensioning assembly (3); after the test sample (7) is fixed, the environmental parameters in the mute box (1) can be adjusted by the adjusting assembly to simulate the actual use scene; wherein the environmental parameters include temperature, humidity and air pressure.

8. The test method of a textile quietness performance test apparatus according to claim 6, characterized by, When rubbing the test sample (7) by the test assembly (5), the rubbing pendulum (55) swings freely by the free-fall movement mode.

9. The test method of a textile sound performance test apparatus according to claim 6, characterized in that, Collecting the sound signal generated during rubbing by the collecting device (4), and transmitting the collected sound signal to the control unit (6) for analysis and processing to obtain the mute performance data of the test sample (7) comprises: S3-1, applying A-weighting filter to the original time domain signal to filter out low frequency and ultrahigh frequency components that are not sensitive to human ears, using A-weighting filter to simulate the characteristics that human ears are sensitive to medium and low frequency sounds and not sensitive to high frequency and low frequency sounds, and through the filter network, the sound pressure signal of different frequencies is "weighted attenuation", so that the measurement result is closer to the actual perceived loudness of human ears, and the correction formula is: wherein the A-weighted sound pressure level (dB(A)); the sound pressure level (dB) for a certain frequency the sound pressure level (dB) for a certain frequency the corresponding A-weighted attenuation value;​ S3-2, calculating the instantaneous square sound pressure value of the filtered signal, and the calculation method is: wherein the filtered instantaneous sound pressure for A; is a time variable; S3-3, calculating the root mean square value of the square sound pressure in time T, and the calculation formula is: where T is the integration time, Leq is the average effective sound pressure over T seconds; S3-4, converting the root mean square sound pressure into sound pressure level, and the calculation formula is: wherein, is the sound pressure level, is the reference sound pressure, is the constant 20 μPA; S3-5, calculating the loudness of the A-weighting filtered frequency domain signal by using the Zwick loudness model: S3-5-1, dividing the frequency domain signal according to the critical frequency band; S3-5-2, calculating the sound pressure level of each critical frequency band, and combining the frequency band weight function to obtain the loudness contribution of the frequency band; S3-5-3, obtaining the total loudness by the total loudness calculation formula, and the formula is: wherein, is the total loudness, is the partial loudness of the th critical band, is the number of critical bands involved in the calculation, and the exponents 0.23 and 4.348 are constants derived from the non-linear perception law of human ear to multi-frequency loudness. S3-6, taking the total loudness as the mute performance data of the test sample (7).

Images