Glass quality detection test bed based on acoustic emission signals

Abstract

The utility model belongs to the technical field of glass detection, and particularly relates to a glass quality detection test bed based on acoustic emission signals, which comprises a support table, an acoustic emission generation module arranged on one side of the support table, and an acoustic emission sensing module arranged on one side of the support table far away from the acoustic emission generation module, acoustic emission with a specific frequency is generated through an acoustic emission generation module, the acoustic emission is transmitted to an acoustic emission sensing module from the side face of a glass substrate along the interior, an acoustic emission signal is collected, amplified and then transmitted to a background computer, and an acoustic emission time domain signal is converted into a frequency domain signal; and the quality of the glass substrate is judged by comparing the specific frequency and amplitude with qualified parameters. The acoustic emission signals are transmitted in the width direction of the glass substrate, the acoustic emission passing area is larger, the number of acoustic emission generation modules can be reduced, and therefore the structure becomes simple, cost is lower, and use is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to glass detection technical field, concretely relates to a glass quality inspection test bench based on acoustic emission signal. BACKGROUND

[0002] The internal defect of glass substrate will undoubtedly seriously affect the quality of glass, therefore, it is crucial to detect glass substrate.

[0003] The existing detection means is mainly through camera vision detection, but it has certain limitation, for example, it is difficult to detect fine scratch. At present, some devices using ultrasonic emission detection can quickly detect the defect of glass substrate, but multiple ultrasonic emission detection units need to work simultaneously, and acoustic emission signal can fully cover glass substrate, so the structure is more complex and the cost is higher. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem to provide a glass quality inspection test bench based on acoustic emission signal, simple structure, and lower cost.

[0005] The utility model provides a glass quality inspection test bench based on acoustic emission signal, and it includes:

[0006] The support table is provided with a damping pad on the top, and the damping pad is used for placing glass substrate;

[0007] The acoustic emission generation module is arranged on one side of the support table, and the acoustic emission generation module is in contact with one side of the glass substrate; and

[0008] The acoustic emission sensing module is arranged on the side of the support table away from the acoustic emission generation module, and the acoustic emission sensing module is in contact with the other side of the glass substrate, and is used for collecting and transmitting acoustic emission signal.

[0009] Optionally, at least one L-shaped hole is formed in one side of the support table, one end of the L-shaped hole extends to the top surface of the damping pad, one acoustic emission sensing module is arranged in the L-shaped hole, and the sensing end of the acoustic emission sensing module abuts the bottom edge of the glass substrate through the L-shaped hole.

[0010] Optionally, the acoustic emission sensing module includes a signal transmitter, an acoustic emission sensor electrically connected with the signal transmitter, and an elastic pad arranged at the bottom of the acoustic emission sensor, the signal transmitter is fixedly installed at the side port of the L-shaped hole, and the elastic pad is fixed at the bottom of the L-shaped hole.

[0011] Optionally, the elastic pad makes the top surface of the acoustic emission sensor flush with the top surface of the damping pad.

[0012] Optionally, a right-angle notch is provided on the side of the support platform away from the acoustic emission sensing module, and a vibration damping layer is attached to the wall of the right-angle notch, the vibration damping layer separating the acoustic emission output end of the acoustic emission generating module from the support platform.

[0013] Optionally, the acoustic emission generation module includes a vibration damping cavity fixedly connected to the support platform, an acoustic emission generator disposed in the vibration cavity, and a waveguide connected to the acoustic emission generator, wherein the waveguide is in contact with the glass substrate.

[0014] Optionally, the waveguide includes a rigid rod directly connected to the acoustic emission generator and a rigid strip plate connected to the rigid rod, the rigid strip plate being disposed along the side of the glass substrate.

[0015] Optionally, the acoustic emission generator is a wireless frequency modulation stereo transmitter with a transmission frequency of 87~108MHz, a voltage of 12V, and a current of less than 5A.

[0016] Optionally, 3-6 acoustic emission sensing modules are evenly arranged along the side of the support platform.

[0017] Optionally, the vibration damping pad is a polyurethane foam board.

[0018] The beneficial effects of this invention are that it generates acoustic emission at a specific frequency through an acoustic emission generation module. The acoustic emission is transmitted from the side of the glass substrate along the interior to the acoustic emission sensing module, where the acoustic emission signal is collected, amplified, and transmitted to a backend computer. The time-domain signal of the acoustic emission is converted into a frequency-domain signal, and the quality of the glass substrate is determined by comparing its specific frequency and amplitude with qualified parameters. Furthermore, by transmitting the acoustic emission signal along the width of the glass substrate, the area through which the acoustic emission passes is larger, reducing the number of acoustic emission generation modules. Consequently, the structure becomes simpler, the cost is lower, and it is more convenient to use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the glass quality testing bench of this utility model;

[0020] Figure 2 This is a longitudinal sectional view of the glass quality testing bench of this utility model;

[0021] Figure 3 for Figure 2 Enlarged view of area A in the image;

[0022] Figure 4 for Figure 3 Enlarged view of area C in the image;

[0023] Figure 5 for Figure 2 Enlarged view of area B in the image.

[0024] In the figure: 100, support table; 110, damping pad; 120, damping layer; 130, L-shaped hole; 200, acoustic emission generation module; 210, damping cavity; 220, acoustic emission generator; 230, waveguide; 231, rigid rod body; 232, rigid long strip plate; 300, acoustic emission sensing module; 310, signal transmitter; 320, acoustic emission sensor; 330, elastic pad; 400, glass substrate. DETAILED DESCRIPTION

[0025] As Figures 1-5 shown, the utility model provides a kind of glass quality inspection test bench based on acoustic emission signal, comprising: support table 100, the acoustic emission generation module 200 of being set to support table 100 one side and the acoustic emission sensing module 300 of being set to support table 100 on side away from acoustic emission generation module 200;Wherein, the top of support table 100 is provided with damping pad 110, and damping pad 110 is used to place glass substrate 400;Acoustic emission generation module 200 is contacted with one side of glass substrate 400;Acoustic emission sensing module 300 is contacted with the other side of glass substrate 400, for collecting and transferring acoustic emission signal.

[0026] Compared with prior art, the utility model provides a kind of glass quality inspection test bench, and specific frequency acoustic emission is generated by acoustic emission generation module 200, and acoustic emission is transferred to acoustic emission sensing module 300 along inside from the side of glass substrate 400, and acoustic emission signal is collected and transferred to background computer after signal amplification, and time-domain signal is converted into frequency-domain signal, and the quality of glass substrate 400 is judged by comparing specific frequency and amplitude with qualified parameters.And make acoustic emission signal transfer along the width direction of glass substrate 400, the area that acoustic emission passes through is larger, can reduce the quantity of acoustic emission generation module 200, and then, structure becomes simple, cost is also lower, and use is more convenient.

[0027] In one embodiment, as Figure 5 shown, at least one L-shaped hole 130 is opened in the side of support table 100, and the one end of L-shaped hole 130 extends to the top surface of damping pad 110, and one acoustic emission sensing module 300 is arranged in L-shaped hole 130, and the sensing end of acoustic emission sensing module 300 abuts the bottom edge of glass substrate 400 through L-shaped hole 130.It can be understood that the sensing end of acoustic emission sensing module 300 is in a relatively closed environment in L-shaped hole 130, and can avoid the contact between sensing end and other parts except glass substrate 400, can reduce the interference of acoustic emission generated by vibration of other objects, and improve the accuracy of detection.

[0028] In one embodiment, the acoustic emission sensing module 300 comprises a signal transmitter 310, an acoustic emission sensor 320 electrically connected to the signal transmitter 310, and an elastic pad 330 arranged at the bottom of the acoustic emission sensor 320. The signal transmitter 310 is fixedly installed at the side port of the L-shaped hole 130, and the elastic pad 330 is fixedly installed at the bottom of the L-shaped hole 130. It can be understood that the signal transmitter 310 is inserted into the side port of the L-shaped hole 130, and the acoustic emission sensor 320 is in an upright state in the L-shaped hole 130, with its sensing end upward and its bottom adhered or clamped to the elastic pad 330. The elastic pad 330 is adhered or clamped to the bottom surface of the L-shaped hole 130. The elastic pad 330 can make the glass substrate 400 and the acoustic emission sensor 320 in elastic contact instead of rigid contact, which can reduce the risk of damage to the glass substrate 400 and make the glass substrate 400 closely adhere to the acoustic emission sensor 320 while maintaining its relative flatness without obvious deformation, which is also conducive to accurately reflecting the detection results of the glass substrate 400.

[0029] In one embodiment, the elastic pad 330 makes the top surface of the acoustic emission sensor 320 flush with the top surface of the damping pad 110. In this way, the interaction force between the acoustic emission sensor 320 and the glass substrate 400 can be as small as possible while meeting the detection requirements.

[0030] In one embodiment, as shown in Figure 3 and Figure 4 , the support table 100 is provided with a right-angled notch on the side away from the acoustic emission sensing module 300, and a damping layer 120 is attached to the wall surface of the right-angled notch. The damping layer 120 separates the acoustic emission output end of the acoustic emission generation module 200 from the support table 100. It can be understood that the damping layer 120 reduces the propagation of acoustic emission to the support table 100, which can reduce the vibration noise of the support table 100 and the interference to the acoustic emission sensor 320, and is conducive to improving the accuracy of detection.

[0031] In one embodiment, the damping layer 120 is a polyurethane foam board. Of course, the damping layer 120 can also be a rubber plate or a silicone plate.

[0032] In one embodiment, as shown in Figure 3 , the acoustic emission generation module 200 comprises a damping cavity 210 fixedly connected to the support table 100, an acoustic emission generator 220 arranged in the damping cavity, and a waveguide 230 connected to the acoustic emission generator 220, which is in contact with the glass substrate 400. It can be understood that the propagation of acoustic emission generated by the acoustic emission generator 220 to the support table 100 is also reduced, which can reduce the vibration noise of the support table 100 and the interference to the acoustic emission sensor 320, and is conducive to improving the accuracy of detection.

[0033] In one embodiment, as shown in Figure 4As shown, the waveguide 230 includes a rigid rod 231 directly connected to the acoustic emission generator 220 and a rigid long strip 232 connected to the rigid rod 231, which is arranged along the side of the glass substrate 400. It can be understood that the acoustic emission signal generated by the acoustic emission generator 220 is first transmitted to the rigid rod 231, and then transmitted along the rigid long strip 232 to the entire side of the glass substrate 400, so that the acoustic emission signal can be transmitted along the glass substrate 400 more uniformly by using only one acoustic emission generator 220, and reaches the acoustic emission sensing module 300 on the opposite side, which can more accurately reflect the quality of the glass substrate 400. Preferably, 3-6 acoustic emission sensing modules 300 are uniformly arranged along the side of the support table 100.

[0034] In one embodiment, the acoustic emission generator 220 is a wireless frequency modulation stereo emitter, with a transmission frequency of 87-108 MHz, a voltage of 12 V, and a current of less than 5 A.

[0035] In one embodiment, the damping pad 110 is a polyurethane foam plate; of course, the damping pad 110 can also be a rubber plate or a silicone plate.

[0036] It should be understood by those of ordinary skill in the art that the above discussion of any embodiment is only exemplary and is not intended to imply that the scope of protection of the present application is limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of one or more embodiments of the present application as described above. In order to be brief, they are not provided in detail.

[0037] One or more embodiments of the present application are intended to cover all such alternatives, modifications and variations falling within the broad scope of the present application. Therefore, any omissions, modifications, equivalent replacements, improvements, etc. made in the spirit and principles of one or more embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A glass quality testing platform based on acoustic emission signals, characterized in that, include: A support platform (100) is provided with a vibration damping pad (110) on its top, the vibration damping pad (110) being used to place a glass substrate (400). An acoustic emission generating module (200) is disposed on one side of the support platform (100), and the acoustic emission generating module (200) is in contact with one side of the glass substrate (400); and An acoustic emission sensing module (300) is disposed on the support platform (100) on the side away from the acoustic emission generating module (200). The acoustic emission sensing module (300) is in contact with the other side of the glass substrate (400) and is used to collect and transmit acoustic emission signals.

2. The glass quality testing bench according to claim 1, characterized in that, At least one L-shaped hole (130) is provided on one side of the support platform (100). One end of the L-shaped hole (130) extends to the top surface of the vibration damping pad (110). An acoustic emission sensing module (300) is provided inside the L-shaped hole (130). The sensing end of the acoustic emission sensing module (300) abuts against the bottom edge of the glass substrate (400) through the L-shaped hole (130).

3. The glass quality testing bench according to claim 2, characterized in that, The acoustic emission sensing module (300) includes a signal transmitter (310), an acoustic emission sensor (320) electrically connected to the signal transmitter (310), and an elastic pad (330) disposed at the bottom of the acoustic emission sensor (320). The signal transmitter (310) is fixedly installed on the side port of the L-shaped hole (130), and the elastic pad (330) is fixedly fixed at the bottom inside the L-shaped hole (130).

4. The glass quality testing bench according to claim 3, characterized in that, The elastic pad (330) makes the top surface of the acoustic emission sensor (320) flush with the top surface of the vibration damping pad (110).

5. The glass quality testing bench according to any one of claims 1-4, characterized in that, The support platform (100) has a right-angle notch on the side away from the acoustic emission sensing module (300), and a damping layer (120) is attached to the wall of the right-angle notch. The damping layer (120) separates the acoustic emission output end of the acoustic emission generating module (200) from the support platform (100).

6. The glass quality testing bench according to claim 5, characterized in that, The acoustic emission generation module (200) includes a vibration damping cavity (210) fixedly connected to the support platform (100), an acoustic emission generator (220) disposed in the cavity, and a waveguide (230) connected to the acoustic emission generator (220). The waveguide (230) is in contact with the glass substrate (400).

7. The glass quality testing bench according to claim 6, characterized in that, The waveguide (230) includes a rigid rod (231) directly connected to the acoustic emission generator (220) and a rigid strip plate (232) connected to the rigid rod (231), the rigid strip plate (232) being disposed along the side of the glass substrate (400).

8. The glass quality testing bench according to claim 6, characterized in that, The acoustic emission generator (220) is a wireless frequency modulation stereo transmitter with a transmission frequency of 87~108MHz, a voltage of 12V, and a current of less than 5A.

9. The glass quality testing bench according to any one of claims 1-4 and 6-8, characterized in that, Three to six acoustic emission sensing modules (300) are evenly arranged along the side of the support platform (100).

10. The glass quality testing bench according to any one of claims 1-4 and 6-8, characterized in that, The vibration damping pad (110) is a polyurethane foam board.

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