CN105842337A - Method for detecting glue layer defect points of fiber cloth - Google Patents

Abstract

The invention provides a method for detecting the defect points of a glue layer of a fiber cloth, which comprises the following steps: extending a fiber cloth; synchronously sensing the two ultrasonic probes on the upper surface and the lower surface of the fiber cloth respectively in an ultrasonic sensing mode so as to sense a defect point in an adhesive layer of the fiber cloth; and analyzing the data sensed by the two ultrasonic probes to obtain the condition that the defect point is in the fiber cloth.

Description

Detection method of adhesive layer defect point of fiber fabric

technical field

The invention relates to a fiber cloth detection method, in particular to a fiber cloth detection method for detecting defects in glue layers.

Background technique

The application level of fiber fabrics is both deep and wide enough to affect people's daily life, from clothing, the surface of equipment casings, and even building materials, to fiber fabrics. The quality of these objects using fiber cloth is closely related to the nature of the fiber cloth, so we usually test the fiber cloth to select the suitable fiber cloth for use.

The fiber cloth usually goes through the manufacturing process of gluing and bonding to make the finished fiber cloth hard but not soft, or to make the finished fiber cloth multi-layered to increase its thickness or strength. Defects in the glued and bonded adhesive layers of the finished fiber fabrics indicate that the fiber fabrics have poor gluing, poor adhesion, air spots in the glue layer, poor glue quality, poor bonding between the glue layers, or gaps between the glue layers. The finished product in conditions such as peeling may further reduce the strength, rigidity, elasticity and other properties of the fiber cloth.

The known detection methods of fiber cloth include tensile strength detection, tensile rigidity detection, tensile elasticity detection, bending strength detection and the like. Although these tests can detect the strength, rigidity, elasticity and other properties of the fiber cloth, they cannot detect the defects of the adhesive layer in the finished product of the fiber cloth.

The adhesive layer defects of fiber fabrics are related to the manufacturing process, and the conventional fiber fabric detection methods can only detect a part of the fibers that are not subsequently used for manufacturing, as the basis for evaluating the finished fibers used in manufacturing, so the fiber The defects of the adhesive layer of the fabric cannot be accurately judged and evaluated by the known detection method of the fiber fabric.

Contents of the invention

The purpose of the present invention is to provide a method for detecting adhesive layer defects of fiber fabrics, which can judge and evaluate the adhesive layer defects of finished fiber fabrics, so as to improve the problems of the prior art.

The technical means adopted by the present invention to solve the problems of the prior art is a method for detecting defects in the adhesive layer of fiber cloth, which includes the following steps: (a) extending and setting a fiber cloth; (b) sensing Two ultrasonic probes are placed on the upper surface and the lower surface of the fiber cloth, and the ultrasonic waves emitted by the ultrasonic probe are used to synchronously sense the upper surface and the lower surface of the fiber cloth to sense the fiber cloth. A defect point in the adhesive layer; and (c) analyzing the data sensed by the two ultrasonic probes to obtain the defect point in the fiber fabric.

In an embodiment of the present invention, the fiber cloth includes a carbon fiber cloth.

In one embodiment of the present invention, the step (b) includes the step of moving the position of the fiber cloth so that the fiber cloth is displaced relative to the two ultrasonic probes.

In one embodiment of the present invention, the step (b) includes the step of moving the positions of the two ultrasonic probes, so that the two ultrasonic probes can sense displacement relative to the fiber cloth.

In one embodiment of the present invention, the fiber cloth is a multi-layer fiber cloth bonded by glue coating.

In one embodiment of the present invention, the step (a) further includes a step of detecting the thickness of each layer of the multi-layer fiber cloth.

In an embodiment of the present invention, the side of the ultrasonic probe facing the fiber cloth has an acrylic member.

In an embodiment of the present invention, after the step (b), it further includes a step of judging that the fiber cloth is a defective product when the defective point in the fiber cloth exceeds a reference value.

In an embodiment of the present invention, after the step (b), it further includes a step of processing the defect points in the fiber cloth to form a fiber cloth detection map.

In an embodiment of the present invention, after the step (b), it further includes a step of marking a problem area on the fiber cloth detection map according to the defect point in the fiber cloth.

Through the technical means adopted in the present invention, the defect points of the adhesive layer of the fiber cloth can be detected by ultrasonic sensing, and through analysis and comparison, the depth, shape, size, and quantity of the defect points can be known , and layers, etc. In this way, the finished fiber cloth can be detected in a non-destructive manner, and the detection accuracy of the fiber cloth can be improved, so as to further improve the manufacturing yield. The detection method provided by the invention not only has good effect, but also is easy to implement, and is quite suitable for being applied to fiber cloth.

Description of drawings

FIG. 1 is a flow chart showing a method for detecting defects in an adhesive layer of a fiber fabric according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a detection system used in a detection method for adhesive layer defect points of fiber fabrics according to an embodiment of the present invention.

Fig. 3 is a schematic diagram showing a fiber cloth according to an embodiment of the present invention.

FIG. 4 is one of the schematic diagrams showing the inspection map of the fiber cloth according to the method for detecting the defect points of the adhesive layer of the fiber cloth according to an embodiment of the present invention.

FIG. 5 is the second schematic diagram of a fiber cloth inspection map showing a method for detecting a defect point of an adhesive layer of a fiber cloth according to an embodiment of the present invention.

FIG. 6 is one of the schematic diagrams showing the detection system applied in the detection method for the adhesive layer defect point of the fiber cloth according to another embodiment of the present invention.

FIG. 7 is the second schematic diagram showing the detection system applied in the detection method for the adhesive layer defect point of the fiber cloth according to another embodiment of the present invention.

FIG. 8 is the third schematic diagram showing the detection system applied in the detection method for the adhesive layer defect point of the fiber cloth according to another embodiment of the present invention.

Symbol Description

1 fiber cloth

11 carbon fiber cloth

111 upper surface

12 carbon fiber cloth

121 lower surface

13, 14, 15 glue line

16 upper surface

17 lower surface

2a, 2b Ultrasonic probe

3a, 3b Acrylic components

4 Analytical institutions

5 pulling mechanism

51 scroll shaft

6 lifting device

7 tanks

8 water supply device

81 water pipe

9 Water-containing components

A problem area

B defects

D1 length direction

M detection map

P1 Conveyor path

R1 direction of rotation

detailed description

The specific embodiments adopted by the present invention will be further described by the following embodiments and attached drawings.

Referring to FIG. 1 , it is a flow chart showing a method for detecting a defect point of an adhesive layer of a fiber fabric according to an embodiment of the present invention. In conjunction with Fig. 2 to Fig. 6, the method for detecting the defect point of the adhesive layer of the fiber cloth of the present invention is described as follows.

The adhesive layer defect detection method of fiber cloth provided by the present invention is used to detect a fiber cloth 1, and the adhesive layer defect detection method of fiber cloth can be applied in a detection system, and the detection system includes two ultrasonic probes 2a, 2b, two acrylic components 3a, 3b, and an analysis mechanism 4. The method for detecting the defect point of the adhesive layer of the fiber cloth includes the following steps: extending a fiber cloth (step S10); The ultrasonic wave sent by the ultrasonic probe is synchronously sensed on the upper surface and the lower surface of the fiber cloth, so as to detect a defect point in a glue layer of the fiber cloth (step S20); and the two ultrasonic probes sensed The measured data is analyzed to obtain the defect point in the fiber cloth (step S30).

In order to understand the situation of the defective point more concisely, in a preferred embodiment, after step S30, it also includes the step of judging that the fiber cloth is a defective product when the situation of the defect point in the fiber cloth exceeds a reference value (step S40) , and the step of processing according to the situation of the defect points in the fiber cloth to form a fiber cloth detection map (step S50), and the step of marking a problem area on the fiber cloth detection map according to the situation of the defect points in the fiber cloth ( Step S60).

as shown in picture 2. First, the fiber cloth 1 is stretched and set (step S10). In this embodiment, the fiber cloth 1 is a multilayer fiber cloth bonded by glue coating, and the fiber cloth 1 includes two carbon fiber cloths 11 , 12 . An adhesive layer 13 is coated between the fiber cloth 11 and the carbon fiber cloth 12 to make the carbon fiber cloth 11 and the carbon fiber cloth 12 adhere to each other. In addition, in order to protect the outer surface of the fiber cloth 1 and make the fiber cloth 1 hard and not collapse, the upper surface 111 of the carbon fiber cloth 11 is coated with an adhesive layer 14, and the lower surface 121 of the carbon fiber cloth 12 is coated with an adhesive layer 15 ( As shown in Figure 3).

Then, the two ultrasonic probes 2a, 2b are synchronously sensed on the upper surface 16 and the lower surface 17 of the fiber cloth 1 respectively by means of ultrasonic sensing, so as to sense the Defect point (step S20). Since the fiber cloth 1 is an extremely thin cloth, the transmission depth of the ultrasonic waves emitted by the ultrasonic probes 2a, 2b does not match the thickness of the fiber cloth 1, thus reducing the sensing accuracy. In order to increase the accuracy of sensing, in this embodiment, the side of the ultrasonic probes 2a, 2b facing the fiber cloth 1 has an acrylic member 3a, 3b, respectively, so that by increasing the ultrasonic probes 2a, 2b The distance from the ultrasonic transmission to the fiber cloth 1, and adjust the matching degree of the ultrasonic transmission depth and the thickness of the fiber cloth. In this embodiment, the thickness of the acrylic members 3 a, 3 b is between 50 mm (millimeter) and 100 mm (millimeter).

In this embodiment, the ultrasonic probes 2a, 2b move along the length direction D1 of the fiber cloth 1, so that the two ultrasonic probes 2a, 2b are displaced relative to the fiber cloth 1, and sense the entire length of the fiber cloth 1. In addition, in the case where the length of the fiber cloth 1 is longer, the position of the fiber cloth 1 is moved so that the fiber cloth 1 is displaced relative to the two ultrasonic probes 2a, 2b (as shown in FIG. 6 ), The fiber cloth 1 is a region where the ultrasonic waves emitted by the ultrasonic probes 2a, 2b are transmitted along a guiding path P1. A pulling mechanism 5 pulls the fiber cloth 1 along the conveying path P1 (the direction of the conveying path P1 is opposite to the longitudinal direction D1 in FIG. The area transmitted by the ultrasound. The pulling mechanism 5 has a rolling shaft 51 , which rotates in a rotation direction R1 to pull the fiber cloth 1 and wind up one end of the fiber cloth 1 . The ultrasonic probes 2a, 2b and the fiber cloth 1 have relative motion through the pulling mechanism 5, so the positions of the ultrasonic probes 2a, 2b can be fixed without displacement along the length direction of the fiber cloth as shown in Fig. 2 . .

Furthermore, the data sensed by the two ultrasonic probes 2a and 2b are analyzed to obtain the fact that the defect is in the fiber fabric 1 (step S30). The ultrasonic probes 2a, 2b are connected to the analysis mechanism 4, and the data sensed by the ultrasonic probes 2a, 2b will be transmitted to the analysis mechanism 4, and the analysis mechanism 4 can obtain the defect point in the fiber fabric 1 based on the analysis of the sensing data . Wherein, the sensing data includes the depth, shape and size of the defective point in the fiber fabric.

Among them, in Fig. 6, the lateral positional relationship of the defect point relative to the fiber cloth 1 (that is, the positional relationship in the longitudinal direction D1 of the fiber cloth 1) is judged according to the position of the fiber cloth 1 in the conveying path P1, and the fiber cloth 1 is in The position of the guiding path P1 can be inferred according to the pulling speed of the pulling mechanism 5 (in this embodiment, the angular velocity of the scrolling shaft 51 multiplied by the radius of the scrolling shaft 51 ).

In this embodiment, the step of detecting the thickness of each layer of the multi-layer fiber cloth 1 is also included before step S10. And the analysis mechanism 4 can clearly detect the layer level of the defect point in the multi-layer fiber cloth 1 by comparing the depth of the defect point in the fiber cloth 1 in the sensing data and the thickness of each layer of the multi-layer fiber cloth 1 .

In addition, after step S30 , in this embodiment, the analyzing mechanism 4 presets a reference value. The analysis mechanism 4 judges that the fiber cloth 1 is a defective product when the defect points in the fiber cloth 1 exceed the reference value (step S40), for example, the number of defect points exceeds the reference value by ten, or the total volume of the defect points exceeds the reference value One cubic centimeter. Furthermore, the analysis mechanism 4 can also process the defect points in the fiber cloth to form a fiber cloth detection map M, and the defect point B can be clearly seen through the map M, as shown in Figure 4 (step S50 ). Furthermore, the analysis mechanism 4 marks a problem area A on the fiber cloth detection map M according to the defect point B in the fiber cloth 1, as shown in FIG. 5 (step S60). With the assistance of the analysis mechanism 4, it is possible to see more directly the areas where the defects are more serious.

Ultrasonic waves are mechanical waves, which are resonant pressure waves. Unlike electromagnetic waves, they cannot be transmitted in a vacuum. So it must pass through the medium as a conductor. Due to the extremely low attenuation of ultrasonic waves in water, the reflection in air is extremely high. Therefore, in a preferred embodiment, the present invention utilizes a lifting device 6 to clamp and fix the fiber cloth 1 and move the fiber cloth 1, so that the fiber cloth 1 is soaked in a water tank 7 filled with water (as shown in FIG. 7 ). Show). Or use a water supply device 8 to supply water through a water pipe 81 to a water-containing member 9 between the acrylic members 3a, 3b and the fiber cloth 1, such as water-containing cloth (as shown in FIG. 8 ). By using water as the medium for conducting ultrasonic waves, the problem of poor conduction of ultrasonic waves in the air can be overcome, and clear and complete detection images can be obtained.

The above narration is only a description of the preferred embodiment of the present invention, and those who are proficient in this art can make other various improvements according to the above description, but these changes still belong to the spirit of the present invention and the defined patent scope middle.

Claims (10)

1. the glue-line defect point detection method of a fiber cloth, it is characterised in that it comprises the following steps:

A one fiber cloth is extended setting by ()；

(b) with ultrasound sensing mode by two ultrasound scanner heads respectively at upper surface and the lower surface of this fiber cloth by this Upper surface and the lower surface of this fiber cloth are made to synchronize sensing, to sense this fiber cloth by the ultrasound that ultrasound scanner head is sent A glue-line in defect point；And

C the data that these two ultrasound scanner heads are sensed are analyzed and are obtained this defect point situation in this fiber cloth by ().

2. the glue-line defect point detection method of fiber cloth as claimed in claim 1, it is characterised in that this fiber cloth system wraps Include a carbon fiber fabric.

3. the glue-line defect point detection method of fiber cloth as claimed in claim 1, it is characterised in that step (b) includes moving The step of the position of this fiber cloth dynamic, so that the displacement relative to these two ultrasound scanner heads of this fiber cloth.

4. the glue-line defect point detection method of fiber cloth as claimed in claim 1, it is characterised in that step (b) includes moving The step of the position of these two ultrasound scanner heads dynamic so that these two ultrasound scanner heads relative to this fiber cloth displacement sensing.

5. the glue-line defect point detection method of fiber cloth as claimed in claim 1, it is characterised in that this fiber cloth system is The multi-layer fiber cloth binded with gluing.

6. the glue-line defect point detection method of fiber cloth as claimed in claim 5, it is characterised in that step (a) is front also to be included Detect the step of each layer thickness of this multi-layer fiber cloth.

7. the glue-line defect point detection method of fiber cloth as claimed in claim 1, it is characterised in that this ultrasound scanner head face There is an acryl component to the side of this fiber cloth.

8. the glue-line defect point detection method of fiber cloth as claimed in claim 1, it is characterised in that also wrap after step (b) Include and judge, when this defect point situation in this fiber cloth is more than a reference value, the step that this fiber cloth is defective products.

9. the glue-line defect point detection method of fiber cloth as claimed in claim 1, it is characterised in that also wrap after step (b) Include and carried out processing according to this defect point situation in this fiber cloth and form the step of a fiber cloth detection map.

10. the glue-line defect point detection method of fiber cloth as claimed in claim 9, it is characterised in that also wrap after step (b) Include the step demarcating a problem area according to this defect point situation in this fiber cloth at this fiber cloth detection map.