Defective non-woven fabric product removing device and identification method

Abstract

The invention relates to a non-woven fabric defective product removing device and an identification method, and belongs to the technical field of identification or measurement which is not specially used for specific variables, and the identification method comprises the following steps: step 1), taking a piece of non-woven fabric, spreading the non-woven fabric, and tensioning the non-woven fabric; step 2), acquiring a first plane deformation image of the non-woven fabric; step 3), acquiring a second plane deformation image of the non-woven fabric; step 4), evaluating the tearing condition of the non-woven fabric based on the first plane deformation condition of the non-woven fabric and the second plane deformation condition of the non-woven fabric; (5) the non-woven fabric is stopped from being tensioned, and whether the non-woven fabric has torn cracks or not is checked; the method has the beneficial effects that by evaluating the tearing condition of the non-woven fabric, tensioning of the non-woven fabric is stopped, whether the non-woven fabric has torn cracks or not is checked, and if the non-woven fabric does not have the torn cracks, the non-woven fabric is a good product; if the non-woven fabric has torn cracks, the non-woven fabric is a defective product, so that the rejection and identification of the defective non-woven fabric products are realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of identification or measurement of non-specific variables, and in particular relates to a device for rejecting defective non-woven fabric products and an identification method. Background Art

[0002] Non-woven fabrics, also known as non-woven fabrics, needle-punched cotton and needle-punched non-woven fabrics, are made of polyester fibers and polyester fibers (PET for short) through a needle-punching process. Non-woven fabrics simply arrange textile short fibers or filaments in a directional or random manner to form a fiber mesh structure, and then use mechanical, thermal bonding or chemical methods to reinforce them.

[0003] After the non-woven fabric is manufactured, it needs to be tested, identified or measured for tensile strength. The tensile strength test of non-woven fabric is carried out using a non-woven tensile testing machine. This equipment analyzes the behavior of non-woven fabric under stress by applying tension and recording the deformation of the non-woven material. The tensile strength measurement of non-woven fabric includes the measurement of maximum bearing capacity and fracture conditions.

[0004] When the tensile strength of the non-woven fabric is tested after it is manufactured, if the tensile strength of the non-woven fabric is good, the non-woven fabric will not break, and the non-woven fabric is a good product; when the tensile strength of the non-woven fabric is tested after it is manufactured, if the non-woven fabric breaks, the non-woven fabric is a defective product. Summary of the invention

[0005] The present invention provides a device for rejecting defective non-woven fabric products and an identification method, which are used to solve the technical problem of how to identify and reject defective non-woven fabric products. The tearing condition of the non-woven fabric is evaluated based on the deformation condition of the first plane of the non-woven fabric and the deformation condition of the second plane of the non-woven fabric, and the tensioning of the non-woven fabric is stopped to check whether the non-woven fabric has torn cracks. If the non-woven fabric has no torn cracks, the non-woven fabric is a good product; if the non-woven fabric has torn cracks, the non-woven fabric is a defective product, thereby achieving the rejection and identification of defective non-woven fabric products.

[0006] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0007] A method for identifying defective nonwoven fabric products comprises the following steps:

[0008] Step 1): Take a piece of non-woven fabric, spread the non-woven fabric, and stretch the non-woven fabric;

[0009] Step 2): collecting an image of the first plane deformation of the non-woven fabric, reading the image of the first plane deformation of the non-woven fabric, and using a plane micro-deformation method to analyze or identify the deformation of the first plane of the non-woven fabric;

[0010] Step 3): collecting an image of the deformation of the second plane of the non-woven fabric, reading the image of the deformation of the second plane of the non-woven fabric, and analyzing or identifying the deformation of the second plane of the non-woven fabric by using a thickness expansion and contraction analysis method;

[0011] Step 4): Based on the deformation of the first plane of the non-woven fabric in step 2) and the deformation of the second plane of the non-woven fabric in step 3), a transverse and longitudinal deformation analysis method is used to evaluate the tearing of the non-woven fabric;

[0012] Step 5): Stop stretching the non-woven fabric and check whether the non-woven fabric has any torn cracks; if the non-woven fabric has no torn cracks, the non-woven fabric is a good product; if the non-woven fabric has torn cracks, the non-woven fabric is a defective product.

[0013] Optionally, in step 1), a tensioning force is applied simultaneously in the width direction and the length direction of the first plane of the non-woven fabric, the tension applied in the width direction of the first plane of the non-woven fabric is equal to the tension applied in the length direction of the first plane of the non-woven fabric, and the thickness of the second plane of the non-woven fabric will become smaller.

[0014] Optionally, in step 2), the plane micro-deformation method is the following formula (1):

[0015] (1);

[0016] in, is the length of the selected area on the first plane of the nonwoven fabric, is the length of the selected area on the first plane of the nonwoven fabric On force points, the length of the selected area Has A stress point, The length of the selected area on A collection of stress points, To calculate The average force point position of the force points and the magnitude of the force at the average force point, To calculate The average force of the force points is To calculate The average position of the force points, To identify the location of the average force point and the magnitude of the force at the average force point; is the length of the selected area on the first plane of the nonwoven fabric The average stress point is identified on the

[0017] is the width of the selected area on the first plane of the nonwoven fabric, The width of the selected area on the first plane of the nonwoven fabric On force points, the width of the selected area Has A stress point, To calculate The average force point position of the force points and the magnitude of the force at the average force point, To identify the location of the average force point and the magnitude of the force at the average force point, is the width of the selected area on the first plane of the nonwoven fabric The average stress point is identified on the

[0018] The length of the selected area to be merged The average force point on the selected area and the width of the selected area Average force point on the

[0019] or It is the average force point of the selected area on the first plane of the non-woven fabric.

[0020] Optionally, in step 3), the thickness expansion analysis method is the following formula (2):

[0021] (2);

[0022] in, is the straight line on the second plane of the nonwoven fabric, is the straight line on the second plane of the nonwoven fabric On point, the points can be compressed or stretched, and the straight line on the second plane of the nonwoven fabric Has Points, For straight line on The operation of connecting points into a straight line;

[0023] For straight line on Connect the points into a straight line;

[0024] or To analyze the straight line on the second plane of the nonwoven fabric The stress conditions at each point on the .

[0025] Optionally, in step 4), the transverse and longitudinal deformation analysis method is the following formula (3):

[0026] (3);

[0027] in, It is the length of the nonwoven fabric stretched or contracted on the first plane. It is the thickness of the second plane of the nonwoven fabric when it is compressed or stretched; The deformation adjustment operation is that if the first plane of the non-woven fabric is stretched, the second plane of the non-woven fabric is compressed, and if the first plane of the non-woven fabric is contracted, the second plane of the non-woven fabric is stretched;

[0028] For the analysis of transverse and longitudinal deformation, if the first plane of the nonwoven fabric is stretched length, the second plane of the nonwoven fabric is compressed Thickness; if the first plane of the nonwoven fabric shrinks length, the second plane of the nonwoven fabric is stretched Thickness; It is the result of transverse and longitudinal deformation.

[0029] A device for rejecting defective nonwoven products, comprising: a data collector, a data processor and a human-computer interaction device;

[0030] The data collector is connected to the data processor, and the data processor is connected to the human-computer interaction device;

[0031] The data collected by the data collector is transmitted to the data processor, and the data processor transmits the processed data to the human-computer interaction device.

[0032] Optional data loggers include:

[0033] An image acquisition sensor, used to acquire an image of the deformation of the first plane of the non-woven fabric and an image of the deformation of the second plane of the non-woven fabric;

[0034] An image recognition unit, used to recognize an image of a first plane deformation of the nonwoven fabric;

[0035] A thickness recognition unit, used to recognize an image of the deformation of the second plane of the nonwoven fabric;

[0036] The image acquisition sensor is connected to the image recognition unit and the thickness recognition unit.

[0037] Optionally, the data processor includes: an information processing module and an information judgment module;

[0038] An information processing module is used to evaluate the tearing of the non-woven fabric according to the image of the deformation of the first plane of the non-woven fabric and the image of the deformation of the second plane of the non-woven fabric; the image recognition unit and the thickness recognition unit are connected to the information processing module;

[0039] The information judging module is used to judge whether the non-woven fabric has any torn cracks, and the information judging module is connected to the information processing module.

[0040] Optionally, the human-computer interaction device includes: a data input module and a data display module, the data input module is connected to the data display module;

[0041] The data input module is used to receive the data processed by the information judgment module, the data display module can display the data processed by the information judgment module, and the data input module is connected to the information judgment module.

[0042] Optionally, the image acquisition sensor includes: a plane image acquisition module and a thickness image acquisition module;

[0043] A plane image acquisition module, used for acquiring an image of the first plane deformation of the non-woven fabric;

[0044] A thickness image acquisition module, used for acquiring an image of the deformation of the second plane of the non-woven fabric;

[0045] The plane image acquisition module is connected to the image recognition unit, and the thickness image acquisition module is connected to the thickness recognition unit.

[0046] Beneficial effects of the present invention:

[0047] 1. The present invention acquires an image of the first plane deformation of the non-woven fabric by a plane image acquisition module of an image acquisition sensor, acquires an image of the second plane deformation of the non-woven fabric by a thickness image acquisition module of an image acquisition sensor, identifies the image of the first plane deformation of the non-woven fabric by an image recognition unit, identifies the image of the second plane deformation of the non-woven fabric by a thickness recognition unit, evaluates the tearing of the non-woven fabric based on the image of the first plane deformation of the non-woven fabric and the image of the second plane deformation of the non-woven fabric by an information processing module, determines whether the non-woven fabric has torn cracks by an information judgment module, receives data processed by the information judgment module, and finally displays the data processed by the information judgment module by a data display module, that is, the data display module finally displays whether the non-woven fabric has torn cracks, thereby realizing the elimination and identification of defective non-woven fabric products.

[0048] 2. The present invention stretches the non-woven fabric, collects and reads an image of the deformation of the first plane of the non-woven fabric, collects and reads an image of the deformation of the second plane of the non-woven fabric, and then evaluates the tearing of the non-woven fabric based on the deformation of the first plane of the non-woven fabric and the deformation of the second plane of the non-woven fabric. The non-woven fabric is stopped from being stretched, and the non-woven fabric is checked for torn cracks. If the non-woven fabric has no torn cracks, the non-woven fabric is a good product; if the non-woven fabric has torn cracks, the non-woven fabric is a defective product, thereby achieving the elimination and identification of defective non-woven fabric products. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 It is a schematic diagram of the internal structure of the defective nonwoven fabric product rejection device of the present invention;

[0051] Figure 2 It is a schematic diagram of the internal structure of the image acquisition sensor of the present invention;

[0052] Figure 3 It is a schematic diagram of the unfolded structure of the nonwoven fabric of the present invention;

[0053] Figure 4 is a selected area on the first plane of the nonwoven fabric of the present invention;

[0054] Figure 5 is a straight line on the second plane of the nonwoven fabric of the present invention;

[0055] Figure 6 It is a schematic diagram of the workflow of the present invention.

[0056] Icon: 1- first plane of non-woven fabric, 2- second plane of non-woven fabric. DETAILED DESCRIPTION

[0057] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0058] Embodiment 1;

[0059] like Figure 1 As shown, this embodiment provides a non-woven fabric product defective product rejection device, including: a data collector, a data processor and a human-computer interaction device;

[0060] The data collector is connected to the data processor, and the data processor is connected to the human-computer interaction device;

[0061] The data collected by the data collector is transmitted to the data processor, and the data processor transmits the processed data to the human-computer interaction device.

[0062] The data collector includes: an image acquisition sensor for acquiring or reading an image of the deformation of the first plane 1 of the non-woven fabric and an image of the deformation of the second plane 2 of the non-woven fabric; an image recognition unit for recognizing the image of the deformation of the first plane 1 of the non-woven fabric; a thickness recognition unit for recognizing the image of the deformation of the second plane 2 of the non-woven fabric;

[0063] The image acquisition sensor is connected to the image recognition unit and the thickness recognition unit;

[0064] The data processor includes: an information processing module and an information judgment module;

[0065] An information processing module is used to evaluate the tearing of the non-woven fabric according to the image of the deformation of the first plane 1 of the non-woven fabric and the image of the deformation of the second plane 2 of the non-woven fabric; the image recognition unit and the thickness recognition unit are connected to the information processing module;

[0066] The information judging module is used to judge whether the non-woven fabric has any torn cracks, and the information judging module is connected to the information processing module.

[0067] The human-computer interaction device comprises: a data input module and a data display module, wherein the data input module is connected to the data display module;

[0068] The data input module is used to receive the data processed by the information judgment module, the data display module can display the data processed by the information judgment module, and the data input module is connected to the information judgment module.

[0069] Further, such as Figure 2 As shown, the image acquisition sensor includes: a plane image acquisition module and a thickness image acquisition module;

[0070] A plane image acquisition module, used for acquiring an image of the deformation of the first plane 1 of the non-woven fabric;

[0071] A thickness image acquisition module, used for acquiring an image of deformation of the second plane 2 of the non-woven fabric;

[0072] The plane image acquisition module is connected to the image recognition unit, and the thickness image acquisition module is connected to the thickness recognition unit.

[0073] In this embodiment, the plane image acquisition module of the image acquisition sensor acquires an image of the deformation of the first plane 1 of the non-woven fabric, the thickness image acquisition module of the image acquisition sensor acquires an image of the deformation of the second plane 2 of the non-woven fabric, the image recognition unit identifies the image of the deformation of the first plane 1 of the non-woven fabric, and the thickness recognition unit identifies the image of the deformation of the second plane 2 of the non-woven fabric. The information processing module evaluates the tearing of the non-woven fabric based on the image of the deformation of the first plane 1 of the non-woven fabric and the image of the deformation of the second plane 2 of the non-woven fabric, the information judgment module determines whether the non-woven fabric has torn cracks, the data input module receives the data processed by the information judgment module, and the data display module finally displays the data processed by the information judgment module, that is, the data display module finally displays whether the non-woven fabric has torn cracks.

[0074] Embodiment 2;

[0075] Based on Example 1, Figure 6As shown, this embodiment provides a method for identifying defective non-woven fabric products, comprising the following steps:

[0076] Step 1): Take a piece of non-woven fabric, spread it out, and stretch it (i.e. Figure 3 The two a directions and Figure 3 The two b directions are tensioned. Figure 3 a and b in it represent forces);

[0077] Step 2): collecting an image of the deformation of the first plane 1 of the non-woven fabric, reading the image of the deformation of the first plane 1 of the non-woven fabric, and using a plane micro-deformation method to analyze or identify the deformation of the first plane 1 of the non-woven fabric;

[0078] Step 3): collecting an image of the deformation of the second plane 2 of the non-woven fabric, reading the image of the deformation of the second plane 2 of the non-woven fabric, and analyzing or identifying the deformation of the second plane 2 of the non-woven fabric by using a thickness expansion and contraction analysis method;

[0079] Step 4): Based on the deformation of the first plane 1 of the non-woven fabric in step 2) and the deformation of the second plane 2 of the non-woven fabric in step 3), a transverse and longitudinal deformation analysis method is used to evaluate the tearing of the non-woven fabric;

[0080] Step 5): Stop stretching the non-woven fabric and check whether the non-woven fabric has any torn cracks; if the non-woven fabric has no torn cracks, the non-woven fabric is a good product; if the non-woven fabric has torn cracks, the non-woven fabric is a defective product.

[0081] Specifically, in step 1), in the width direction of the first plane 1 of the nonwoven fabric (i.e. Figure 3 in the two a directions) and in the length direction (i.e. Figure 3 The tensioning force is applied simultaneously in the two b directions of the nonwoven fabric, and the tension applied in the width direction of the first plane 1 of the nonwoven fabric is equal to the tension applied in the length direction of the first plane 1 of the nonwoven fabric (i.e. Figure 3 The size of the two a's and the size of the two b's are equal), the thickness of the second plane 2 of the non-woven fabric will become smaller.

[0082] In step 2), the plane micro-deformation method is as follows:

[0083] (1);

[0084] in, is the length of the selected area on the first plane 1 of the nonwoven fabric, is the length of the selected area on the first plane 1 of the nonwoven fabric On force points, the length of the selected area Has A stress point, The length of the selected area on A collection of stress points, To calculate The average force point position of the force points and the magnitude of the force at the average force point, To calculate The average force of the force points is To calculate The average position of the force points, To identify the location of the average force point and the magnitude of the force at the average force point; is the length of the selected area on the first plane 1 of the nonwoven fabric The average force point is identified on the

[0085] is the width of the selected area on the first plane 1 of the nonwoven fabric, is the width of the selected area on the first plane 1 of the nonwoven fabric On force points, the width of the selected area Has A stress point, To calculate The average force point position of the force points and the magnitude of the force at the average force point, To identify the location of the average force point and the magnitude of the force at the average force point, is the width of the selected area on the first plane 1 of the nonwoven fabric The average force point is identified on the

[0086] The length of the selected area to be merged The average force point on the selected area and the width of the selected area Average force point on the

[0087] or It is the average stress point of the selected area on the first plane 1 of the non-woven fabric.

[0088] In step 3), the thickness expansion analysis method is the following formula (2):

[0089] (2);

[0090] in, is a straight line on the second plane 2 of the nonwoven fabric, is the straight line on the second plane 2 of the nonwoven fabric On Point, points can be compressed or stretched, and the straight line on the second plane 2 of the nonwoven fabric Has Points, For straight line on The operation of connecting points into a straight line;

[0091] For straight line on Connect the points into a straight line;

[0092] or To analyze the straight line on the second plane 2 of the nonwoven fabric The stress conditions at each point on the .

[0093] In step 4), the transverse and longitudinal deformation analysis method is as follows:

[0094] (3);

[0095] in, To stretch the nonwoven fabric on the first plane 1 (i.e. Figure 3 The two a directions and Figure 3 in the two b directions) or contraction (i.e. Figure 3 The opposite direction of the two a directions and Figure 3 The length of the two b directions in the opposite direction, The thickness of the second plane 2 of the nonwoven fabric is compressed (i.e., the first plane 1 of the nonwoven fabric is stretched) or stretched (i.e., the first plane 1 of the nonwoven fabric is shrunk); It is a deformation adjustment operation, wherein if the first plane 1 of the non-woven fabric is stretched, the second plane 2 of the non-woven fabric is compressed, and if the first plane 1 of the non-woven fabric is contracted, the second plane 2 of the non-woven fabric is stretched;

[0096] For the analysis of transverse and longitudinal deformation, if the first plane of the nonwoven fabric is stretched length, the nonwoven second plane 2 is compressed If the nonwoven first plane 1 shrinks The length of the nonwoven second plane 2 is stretched Thickness; It is the result of transverse and longitudinal deformation.

[0097] Embodiment 3;

[0098] Based on Example 2, Figure 4 As shown, Figure 4 is the selected area on the first plane 1 of the nonwoven fabric. In formula (1), the length of the selected area on the first plane 1 of the nonwoven fabric is ,exist There is of stress points, identify The average force point position of the force points (i.e. Figure 4 of ) and the magnitude of the force at the average force point (i.e. Figure 4 of The magnitude of the force), the length of the selected area on the first plane 1 of the non-woven fabric The average force point on ;

[0099] The width of the selected area on the first plane 1 of the nonwoven fabric is ,exist There is of stress points, identify The average force point position of the force points (i.e. Figure 4 of ) and the magnitude of the force at the average force point (i.e. Figure 4 of The force of the nonwoven fabric is the width of the selected area on the first plane 1. The average force point on ;

[0100] Merge the length of the selected area The average force point on and the width of the selected area The average force point on ;

[0101] Finally, the average stress point of the selected area on the first plane 1 of the non-woven fabric is .

[0102] Embodiment 4;

[0103] Based on Example 2, Figure 5 As shown, Figure 5 is the straight line on the second plane 2 of the nonwoven fabric , in formula (2), through or Analyze the straight line on the second plane 2 of the nonwoven fabric Each point on Click to The stress conditions of each point).

[0104] Embodiment 5;

[0105] Based on Example 2 and Example 3, in step 5), when the thickness of the second plane 2 of the non-woven fabric is compressed, and according to the average force point of the selected area on the first plane 1 of the non-woven fabric to check whether the non-woven fabric is torn, and the average stress point of the selected area on the first plane 1 of the non-woven fabric The magnitude of the force applied is a fixed value. If the average force point on the first plane 1 of the nonwoven fabric is If there is no tear, the nonwoven fabric is of good quality. If the average stress point on the first plane 1 of the nonwoven fabric is If there are tears, the non-woven fabric is defective.

[0106] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for identifying defective nonwoven fabric products, characterized in that: The steps include: Step 1): Take a piece of non-woven fabric, spread the non-woven fabric, and stretch the non-woven fabric; Step 2): collecting an image of the first plane deformation of the non-woven fabric, reading the image of the first plane deformation of the non-woven fabric, and using a plane micro-deformation method to analyze or identify the deformation of the first plane of the non-woven fabric; Step 3): collecting an image of the deformation of the second plane of the non-woven fabric, reading the image of the deformation of the second plane of the non-woven fabric, and analyzing or identifying the deformation of the second plane of the non-woven fabric by using a thickness expansion and contraction analysis method; Step 4): Based on the deformation of the first plane of the non-woven fabric in step 2) and the deformation of the second plane of the non-woven fabric in step 3), the tearing of the non-woven fabric is evaluated by using a transverse and longitudinal deformation analysis method; Step 5): Stop stretching the non-woven fabric and check whether the non-woven fabric has any torn cracks; if the non-woven fabric has no torn cracks, the non-woven fabric is a good product; if the non-woven fabric has torn cracks, the non-woven fabric is a defective product.

2. The method for identifying defective nonwoven fabric products according to claim 1, characterized in that: In the step 1), a tensioning force is applied simultaneously in the width direction and the length direction of the first plane of the nonwoven fabric, and the tension applied in the width direction of the first plane of the nonwoven fabric is equal to the tension applied in the length direction of the first plane of the nonwoven fabric.

3. The method for identifying defective nonwoven fabric products according to claim 1, characterized in that: In the step 2), the plane micro-deformation method is the following formula (1): (1)； in, is the length of the selected area on the first plane of the nonwoven fabric, is the length of the selected area on the first plane of the nonwoven fabric On force points, the length of the selected area Has A stress point, The length of the selected area on A collection of stress points, To calculate The average force point position of the force points and the magnitude of the force at the average force point, To calculate The average force of the force points is To calculate The average position of the force points, To identify the location of the average force point and the magnitude of the force at the average force point; is the length of the selected area on the first plane of the nonwoven fabric The average stress point is identified on the is the width of the selected area on the first plane of the nonwoven fabric, The width of the selected area on the first plane of the nonwoven fabric On force points, the width of the selected area Has A stress point, To calculate The average force point position of the force points and the magnitude of the force at the average force point, To identify the location of the average force point and the magnitude of the force at the average force point, is the width of the selected area on the first plane of the nonwoven fabric The average stress point is identified on the The length of the selected area to be merged The average force point on the selected area and the width of the selected area Average force point on the or It is the average force point of the selected area on the first plane of the non-woven fabric.

4. The method for identifying defective nonwoven fabric products according to claim 1, characterized in that: In the step 3), the thickness expansion analysis method is the following formula (2): (2)； in, is the straight line on the second plane of the nonwoven fabric, is the straight line on the second plane of the nonwoven fabric On point, the points can be compressed or stretched, and the straight line on the second plane of the nonwoven fabric Has Points, For straight line on The operation of connecting points into a straight line; For straight line on Connect the points into a straight line; or To analyze the straight line on the second plane of the nonwoven fabric The stress conditions at each point on the .

5. The method for identifying defective nonwoven fabric products according to claim 1, characterized in that: In the step 4), the transverse and longitudinal deformation analysis method is the following formula (3): (3)； in, It is the length of the nonwoven fabric stretched or contracted on the first plane. It is the thickness of the second plane of the nonwoven fabric when it is compressed or stretched; The deformation adjustment operation is that if the first plane of the non-woven fabric is stretched, the second plane of the non-woven fabric is compressed, and if the first plane of the non-woven fabric is contracted, the second plane of the non-woven fabric is stretched; For the analysis of transverse and longitudinal deformation, if the nonwoven fabric is stretched on the first plane length, the second plane of the nonwoven fabric is compressed Thickness; if the first plane of the nonwoven fabric shrinks length, the second plane of the nonwoven fabric is stretched Thickness; It is the result of transverse and longitudinal deformation.

6. A non-woven fabric defective product rejection device, used to execute a non-woven fabric defective product identification method according to any one of claims 1 to 5, characterized in that , including: data collector, data processor and human-computer interaction device; The data collector is connected to the data processor, and the data processor is connected to the human-computer interaction device; The data collected by the data collector is transmitted to the data processor, and the data processor transmits the processed data to the human-computer interaction device.

7. The device for removing defective nonwoven fabric products according to claim 6, characterized in that , the data collector comprises: An image acquisition sensor, used to acquire an image of the deformation of the first plane of the non-woven fabric and an image of the deformation of the second plane of the non-woven fabric; An image recognition unit, used to recognize an image of the first plane deformation of the non-woven fabric; a thickness recognition unit, used to recognize an image of the second plane deformation of the nonwoven fabric; The image acquisition sensor is connected to the image recognition unit and the thickness recognition unit.

8. The device for removing defective nonwoven fabric products according to claim 7, characterized in that ,The data processor includes: an information processing module and an information judgment module; The information processing module is used to evaluate the tearing of the non-woven fabric according to the image of the first plane deformation of the non-woven fabric and the image of the second plane deformation of the non-woven fabric; the image recognition unit and the thickness recognition unit are connected to the information processing module; The information judging module is used to judge whether the non-woven fabric has any torn cracks, and the information judging module is connected to the information processing module.

9. The device for removing defective nonwoven fabric products according to claim 8, characterized in that ,The human-computer interaction device includes: a data input module and a data display module, the data input module is connected to the data display module; The data input module is used to receive the data processed by the information judgment module, the data display module can display the data processed by the information judgment module, and the data input module is connected to the information judgment module.

10. The device for removing defective nonwoven fabric products according to claim 6, characterized in that ,The image acquisition sensor includes: a plane image acquisition module and a thickness image acquisition module; The plane image acquisition module is used to acquire an image of the first plane deformation of the non-woven fabric; The thickness image acquisition module is used to acquire an image of the second plane deformation of the non-woven fabric; The plane image acquisition module is connected to the image recognition unit, and the thickness image acquisition module is connected to the thickness recognition unit.

Images