CN106200038B - A kind of edge detection system of glass substrate and detection method thereof - Google Patents

Abstract

The present invention relates to an edge detection system of a glass substrate and a detection method thereof, wherein the glass substrate has first, second, third and fourth sides, the first side and the second side are parallel, and the detection system It includes a driving device, a first detector, a second detector, a third detector and a fourth detector, the driving device is one driver or two drivers, the first detector and the second detector are fixed, and the third detector The detector and the fourth detector move under the driving of the driving device; the detection method is as follows: the first detector and the second detector respectively detect the first side and the second side of the glass substrate to be tested, and the third detection device and The fourth detection device detects the third side edge and the fourth side edge of the glass substrate to be tested, respectively. The method can not only improve the edge detection efficiency of the glass substrate, improve the production efficiency of the entire production line, but also reduce errors in the detection process and increase the service life of the detector.

Description

A kind of edge detection system of glass substrate and detection method thereof

technical field

The invention relates to an edge detection of a glass substrate, in particular to an edge detection system of a glass substrate and a detection method thereof.

Background technique

In recent years, with the development of modern science and technology and the progress of information technology, display technology is gradually developing in the direction of light weight and large format. Liquid Crystal Display (LCD) has the advantages of low operating voltage, no radiation, no flicker, space saving, etc. It has been widely used in high-end electronic display fields such as optoelectronics, biomedicine and national defense, such as LCD TVs, instruments Instrumentation, communication, monitoring, etc.

The liquid crystal display glass substrate has a thin thickness and a large area, and is an important part of the liquid crystal display panel. In order to improve work efficiency in production, a larger liquid crystal glass is usually cut to obtain a plurality of glass substrates with a required area. Therefore, the quality of the cut liquid crystal glass substrate directly affects the quality of subsequent products.

Compared with ordinary glass, liquid crystal glass substrates have the characteristics of high brittleness and thinness. Therefore, when cutting glass substrates, the phenomena such as chipping, under-grinding, over-grinding, edge burning, unpolished feet, edge cracking, and corner loss often occur. . Therefore, in order to produce qualified liquid crystal glass substrates, it is necessary to inspect the edges of the glass substrates. In the existing edge detection of liquid crystal glass substrates, since the glass runs in one direction, it takes 4 detections to complete the detection of the four sides of the glass, and when detecting the front and rear edges (the front and rear edges here are perpendicular to Both sides of the conveyor belt forward direction), the glass needs to be stationary, and the detection equipment moves to complete the detection, which has a great impact on the rhythm of the entire production line and seriously affects the operation efficiency of the production line.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide an edge detection system of a glass substrate and a detection method thereof, and the technical problem to be solved is to improve the efficiency of edge detection of the glass substrate, so as to be more suitable for practical use.

The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions.

According to an edge detection system of a glass substrate proposed by the present invention, the glass substrate has a first side, a second side, a third side and a fourth side, the first side and the second side The sides are parallel, the detection system includes a driving device, a first detector, a second detector, a third detector and a fourth detector, the driving device includes one driver or two drivers, the first detector The detector and the second detector are fixedly arranged; the third detector and the fourth detector are jointly driven by one driver; or, the third detector is driven by one driver, and the fourth detector is driven by another driver drive.

The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

Preferably, in the aforementioned edge detection system for a glass substrate, the driving device is a servo motor.

Preferably, in the aforementioned system for detecting an edge of a glass substrate, the vertical distance between the first detector and the third detector is the same as the length of the first side or the second side of the glass substrate.

Preferably, in the aforementioned edge detection system for a glass substrate, the first detector, the second detector, the third detector, and the fourth detector are on-line detectors or off-line detectors.

The purpose of the present invention and the solution to its technical problems are also achieved by the following technical solutions.

According to an edge detection method of a glass substrate provided by the present invention, the glass substrate has a first side, a second side, a third side and a fourth side, the first side and the second side The sides are parallel; the first detector, the second detector, the third detector and the fourth detector are used to detect the first side, the second side, the third side and the fourth side respectively; The first detector and the second detector are fixedly arranged, the glass substrate is conveyed to move in a preset direction, the first side passes through the detection area of the first detector, and the second side passes through the first detector. The detection area of the second detector is to obtain the detection data of the first side and the second side panel; the third detector is driven to make the detection area of the third detector move along the third side, Obtain the detection data of the third side; drive the fourth detector, so that the detection area of the fourth detector moves along the fourth side, and obtain the detection data of the fourth side.

The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

Preferably, in the aforementioned method for detecting an edge of a glass substrate, the first detector, the second detector, the third detector and the fourth detector are on-line detectors or off-line detectors.

Preferably, in the aforementioned method for detecting an edge of a glass substrate, wherein the third detector and the fourth detector are jointly driven by a driver; or, the third detector is driven by a driver, and the The quad detector is driven by another driver.

Preferably, in the aforementioned method for detecting an edge of a glass substrate, the method for detecting a glass substrate to be tested is as follows: the first detector and the second detector are fixedly arranged, and the glass substrate to be tested is arranged along the edge Move in a preset direction to complete the detection of the first side and the second side of the glass substrate to be tested; the third detector and the fourth detector are respectively driven by the two drivers along the glass substrate to be tested. The third side and the fourth side move to complete the detection of the third side and the fourth side of the glass substrate to be tested.

Preferably, in the aforementioned method for detecting the edge of a glass substrate, the method for detecting two or more glass substrates is as follows: the first detector and the second detector are fixedly arranged, and the glass substrate to be detected is along a preset direction. movement to complete the detection of the first side and the second side of the glass substrate to be tested; the third detector and the fourth detector are driven by the driver, respectively, along the third side of the second glass substrate to be tested. The edge and the fourth side edge of the first glass substrate to be tested move to complete the detection, the third detector and the fourth detector are located between the first glass substrate to be tested and the second glass substrate to be tested, and the The third detector and the fourth detector make a first synchronous movement, the speed of the first synchronous movement is the first speed, and the two glass substrates that are detected at the same time are located in front of the preset direction of the movement of the glass substrates The one is the first glass substrate to be tested, and the one located behind is the second glass substrate to be tested.

Preferably, the aforementioned method for detecting an edge of a glass substrate, wherein the method for detecting two or more glass substrates is: the first detector and the second detector are fixedly arranged, and the glass substrate to be tested is Move along the preset direction to complete the detection of the first side and the second side of the glass substrate to be tested, and the moving speed of the glass substrate to be tested is the second speed; the third detector and the fourth detector are in the driver. Under the driving action, it moves along the third side of the second glass substrate to be tested and the fourth side of the first glass substrate to be tested to complete the detection. The third detector and the fourth detector are located in the first Between the glass substrate to be tested and the second glass substrate to be tested, and the third detector and the fourth detector make a second synchronous movement, the speed of the second synchronous movement is the third speed, and the speed of the second synchronous movement is the third speed. The third speed is the sum of the first speed and the second speed. Among the two glass substrates to be tested at the same time, the first glass substrate to be tested is located in front of the preset direction of movement of the glass substrates, and the second glass substrate to be tested is located at the rear. Glass base board.

With the above technical solutions, an edge detection system for a glass substrate and a detection method thereof of the present invention have at least the following advantages:

1. Improve the edge detection efficiency of the glass substrate and save energy.

In the existing glass substrate edge detection method, the glass to be tested needs to be stationary and the detector moves to complete the detection of the four edges of the glass substrate in sequence, which takes a long time and seriously hinders the production efficiency. The present invention designs four detectors, the first detector and the second detector are fixed and used to detect the first side and the second side of the glass substrate, the third detector and the fourth detector detect the third side and fourth side.

In a preferred embodiment, the glass substrate moves with the conveyor belt, and the third detector and the fourth detector can also move with the movement of the glass substrate while detecting the third side and the fourth side. Therefore, the entire detection In the process, only need to adjust the moving speed of the glass substrate and the distance between two adjacent glass substrates, the edge of the glass substrate can be continuously detected, and the conveyor belt does not need to stop, which can improve the detection efficiency by about 50%-75%. At the same time, it saves energy resources (because the energy required for the uniform motion of the conveyor belt is less than the energy required for the intermittent motion of the conveyor belt, and when the conveyor belt is suspended, the entire production device needs to be suspended), so it is more suitable for actual production.

2. The detection equipment is relatively fixed, which reduces the error caused by rotating the detector during the detection process, and increases the service life of the detector.

The distance between the detector and the glass substrate to be tested is one of the key factors to obtain accurate data, so the distance between the detector and the glass to be tested must be strictly controlled. In the existing glass substrate edge detection equipment, the detection equipment needs to be rotated to complete the detection of the four edges of the glass substrate. Such a rotation process increases the difficulty of controlling the distance between the detector and the glass to be tested, and easily causes errors. In turn, the test results are inaccurate and the quality of the product is affected. In the present invention, the detector does not need to be rotated, and the distance between the detector and the glass substrate can be strictly controlled, thereby improving the accuracy of the detection results; and, in the present invention, the detector does not need to be rotated, thereby increasing the service life of the detector.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, and implement it according to the content of the description, the preferred embodiments of the present invention are described in detail below with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of a detection method when a glass substrate edge detection system detects a glass substrate.

1 first detector, 2 second detector, 3 third detector, 4 fourth detector; 11 the first side of the glass substrate, 12 the second side of the glass substrate, 13 the third side of the glass substrate , 14 The fourth side of the glass substrate.

FIG. 2 is a schematic diagram of the detection method when the glass substrate edge detection system intermittently detects two glass substrates at the same time.

1 The first detector, 2 The second detector, 3 The third detector, 4 The fourth detector, 5 The first glass substrate to be tested, 6 The second glass substrate to be tested, 7 The third glass substrate to be tested , V ₀ the movement speed of the glass substrate to be tested, V ₁ the movement speed of the third detector and the fourth detector.

FIG. 3 is a schematic diagram of the detection method when the glass substrate edge detection system is continuous and detects two glass substrates at the same time.

1 The first detector, 2 The second detector, 3 The third detector, 4 The fourth detector, 5 The first glass substrate to be tested, 6 The second glass substrate to be tested, 7 The third glass substrate to be tested , V ₀ the moving speed of the glass substrate to be tested, V ₂ the moving speed of the third detector and the fourth detector, V ₂ can be decomposed into V ₀ and V ₁ , V ₁ is the same as V ₁ in FIG. 2 .

Detailed ways

In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following describes the specific implementation and structure of a method for edge detection of a glass substrate according to the present invention with reference to the accompanying drawings and preferred embodiments. , features and their effects are described in detail below. In the following description, different "an embodiment" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures or characteristics in one or more embodiments may be combined in any suitable form.

The existing detection methods for glass substrates mainly fall into two categories, namely, online detection and offline detection. Commonly used offline detection methods mainly include potential method, magnetic particle method, ultrasonic method, ray method and electromagnetic detection method. The present invention is applicable to all on-line detectors and off-line detectors. Specifically, the on-line detectors include: CCD matrix cameras and LCD light sources, and the off-line detectors include: CCD matrix cameras and LCD light sources.

The present invention is applicable to a glass substrate having four sides, such as a rectangle, and at least two parallel opposite sides. Wherein, the rectangle is a rectangle or a square.

Example 1

In this embodiment, the glass substrate to be tested is one piece.

In this embodiment, the glass substrate to be tested is a neutral borosilicate glass substrate, the shape of the glass substrate to be tested is a square, and the side length is 1300 mm×1300 mm. The first side 11 , the second side 12 , the third side 13 , and the fourth side 14 of the glass substrate to be tested are shown in FIG. 1 . There are four glass substrate edge detectors in this embodiment.

The first detector 1 and the second detector 2 are symmetrically fixed on both sides of the glass substrate, respectively located at the end points of the same side of the first side 11 and the second side 12 of the glass substrate to be tested. With the movement of the conveyor belt, under the condition that the glass substrate is moving and the first detector 1 and the second detector 2 are stationary, when the neutral borosilicate glass substrate to be tested passes through the first detector 1 and the second detector 2, it is completed. Detection of the first side 11 and the second side 12 . At this time, the speed of the glass substrate moving with the conveyor belt is V ₀ , and the speed of V ₀ is 166 mm/s.

The third detector 3 and the fourth detector 4 are used to detect the third side 13 and the fourth side 14 of the glass substrate to be tested. The driving device is composed of two drivers, which respectively drive the third detector 3 and the fourth detector 4 to move. At this time, the conveyor belt pauses, and the glass substrate to be tested suspends its movement. Under the condition that the detector moves and the glass to be tested is stationary , the third detector 3 completes the detection of the third side edge 13 , and the fourth detector 4 completes the detection of the fourth side edge 14 . Driven by the driver, the movement speed of the third detector 3 and the fourth detector 4 is V ₁ , and the speed of V ₁ is 200 mm/s.

The first detector 1, the second detector 2, the third detector 3 and the fourth detector 4 are all composed of a CCD matrix camera and an LCD light source.

The detection indicators of the four detectors in this embodiment include chipping, under-grinding, over-grinding, edge burnt, unpolished feet, edge cracking, corner loss, and the like. If the above phenomenon is not detected, it is a qualified product.

In this embodiment, the time to complete the edge detection of a glass substrate is 14.33s.

Example 2

In this embodiment, there are three glass substrates to be tested. The glass substrate edge detection system of this embodiment can intermittently detect two glass substrates at the same time.

The liquid crystal glass substrate described in this embodiment is soda glass with a rectangular shape, the length of the first side and the second side is 1850mm, and the length of the third side and the fourth side is 1500mm. The edge detection system of glass substrates detects two glass substrates at the same time, as shown in Figure 2.

The glass substrate 5 , the glass substrate 6 and the glass substrate 7 move along the preset direction with the conveyor belt, the first detector 1 and the second detector 2 are fixedly arranged, and the third detector 3 and the fourth detector 4 are located in two adjacent blocks to be between the measuring glass, and move under the drive of the driver.

When the first side and the second side of the glass substrate 5 move to the first detector 1 and the second detector 2, the glass substrate 5 continues to move with the drive belt to complete the detection of the first side and the second side of the glass substrate 5. side detection;

When the glass substrate 5 moves to the third detector 3, the conveyor belt is temporarily conveyed, the glass substrate stops moving, and the third detector 3 moves along the third side of the glass substrate 5 under the drive of the driver to complete the detection of the glass substrate 5. The detection of the third side of ;

The conveyor belt resumes transmission, and the glass substrate resumes movement. At this time, the first detector 1 and the second detector 2 detect the first side and the second side of the glass substrate 6. When the glass substrate 6 moves to the third detector At 3 points, the first detector 1 and the second detector 2 complete the detection of the first side and the second side of the glass substrate 6, the conveyor belt is temporarily conveyed, the glass substrate stops moving, the third detector 3 and the fourth The detector 4 performs synchronous movement under the driving action of the driver, and the third detector 3 and the fourth detector 4 respectively complete the detection of the third side of the glass substrate 6 and the fourth side of the glass substrate 5;

The conveyor belt resumes transmission, and the glass substrate resumes movement. At this time, the first detector 1 and the second detector 2 detect the first and second sides of the glass substrate 7. When the glass substrate 7 moves to the third detector At 3 points, the glass substrate stops moving, the third detector 3 and the fourth detector 4 move synchronously under the driving action of the driver, and the third detector 3 and the fourth detector 4 respectively complete the detection of the third side of the glass substrate 7. Detection of the edge and the fourth side of the glass substrate 6;

The conveyor belt resumes transmission, and the glass substrate resumes movement. When the glass substrate 7 moves to the fourth detector 4, the glass substrate stops moving. The fourth detector 4 moves along the fourth side of the glass substrate 7 under the drive of the driver. Detection of the fourth side of the glass substrate 7 .

The speed of the glass substrate moving with the conveyor belt is V ₀ , and the speed of V ₀ is 166mm/s. Under the driving of the driver, the moving speed of the third detector 3 and the fourth detector 4 is V ₁ , and the speed of V ₁ is 200mm /s. The distance between the glass substrate 5 and the glass substrate 6 was 40 cm, and the distance between the glass substrate 6 and the glass substrate 7 was also 40 cm.

In this embodiment, the time to complete the edge detection of a glass substrate is 18.9s.

Example 3

In this embodiment, there are three glass substrates to be tested. The glass substrate edge detection system of this embodiment can continuously detect two glass substrates at the same time.

The liquid crystal glass substrate described in this embodiment is soda glass with a rectangular shape, the length of the first side and the second side is 1850mm, and the length of the third side and the fourth side is 1500mm. The edge detection system of glass substrates detects two glass substrates at the same time, as shown in Figure 3.

In this embodiment, the third detector 3 and the fourth detector 4 move synchronously, and the movement speed is V ₂ , and V ₂ is the sum of V ₀ and V ₁ in the second embodiment, that is, the third detector 3 and the fourth detector 4 The detector 4 moves synchronously with the glass substrate while moving along the third side and the fourth side, so that the edge detection of the glass substrate is completed under the condition of continuous movement of the conveyor belt.

In this embodiment, after the third detector 3 and the fourth detector 4 complete the detection of the third side and the fourth side, they quickly return to the original starting point, and repeat the above process for the third side of the next group of glass substrates. Detect the side edge and the fourth side edge, or quickly move to the point on the opposite side of the original starting point and wait. When the next group of glass pieces passes by, in the opposite direction to the above V ₁ , the next group of the third side edge will be detected. and the fourth side for detection.

Other detection steps are the same as in Example 2 or adjusted accordingly.

The speed V ₀ of the glass substrate to be tested moves with the conveyor belt is 166mm/s, the speed V ₂ of the movement of the third detector 3 and the fourth detector 4 is 259.9mm/s, and the distance between the glass substrate 5 and the glass substrate 6 is 40cm , the distance between the glass substrate 6 and the glass substrate 7 is also 40cm.

In this embodiment, the time to complete the edge detection of a glass substrate is 11.1 s.

The present invention can detect multiple glass substrates according to the detection method in Embodiment 2 or Embodiment 3;

According to the detection characteristics of other detectors, the invention can adjust the movement speed of the transmission belt and the driver, etc., so as to be suitable for other detectors;

Velocity in the present invention includes velocity and direction.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention still belong to the present invention. within the scope of the technical solution of the invention.

Claims (9)

1. An edge detection system for a glass substrate, the glass substrate has a first side, a second side, a third side and a fourth side, the first side and the second side are parallel, It is characterized by: The detection system includes a driving device, a first detector, a second detector, a third detector and a fourth detector, and the driving device includes one driver or two drivers, The first detector and the second detector are fixedly arranged; The third detector and the fourth detector are jointly driven by one driver; or, the third detector is driven by one driver, and the fourth detector is driven by another driver; The vertical distance between the first detector and the third detector is the same as the length of the first side or the second side of the glass substrate. 2. The edge detection system of a glass substrate according to claim 1, wherein: The drive device is driven by a servo motor. 3. The edge detection system of a glass substrate according to claim 1, wherein: The first detector, the second detector, the third detector and the fourth detector are on-line detectors or off-line detectors. 4. An edge detection method for a glass substrate, characterized in that: The glass substrate has a first side, a second side, a third side and a fourth side, the first side is parallel to the second side; a first detector, a second detector, a third side are used; The three detectors and the fourth detector respectively detect the first side, the second side, the third side and the fourth side; The first detector and the second detector are fixedly arranged, the glass substrate is conveyed to move in a preset direction, the first side passes through the detection area of the first detector, and the second side passes through the first detector. In the detection area of the two detectors, the detection data of the first side and the second side are obtained; driving the third detector, so that the detection area of the third detector moves along the third side edge to obtain the detection data of the third side edge; The fourth detector is driven, so that the detection area of the fourth detector moves along the fourth side, and the detection data of the fourth side is obtained. 5. The edge detection method of a glass substrate according to claim 4, wherein: The first detector, the second detector, the third detector and the fourth detector are on-line detectors or off-line detectors. 6. The edge detection method of a glass substrate according to claim 4, wherein: The third detector and the fourth detector are jointly driven by a driver; Alternatively, the third detector is driven by one driver, and the fourth detector is driven by another driver. 7. The edge detection method of a glass substrate according to any one of claims 4-6, wherein the method for detecting a glass substrate to be tested is: The first detector and the second detector are fixedly arranged, and the glass substrate to be tested moves along a preset direction to complete the detection of the first side edge and the second side edge of the glass substrate to be tested; The third detector and the fourth detector move along the third side and the fourth side of the glass substrate to be tested respectively under the driving action of the two drivers to complete the third side and the fourth side of the glass substrate to be tested. Detection of the fourth side. 8. The edge detection method of a glass substrate according to any one of claims 4-6, wherein the method for detecting two or more glass substrates is: The first detector and the second detector are fixedly arranged, and the glass substrate to be tested moves along a preset direction to complete the detection of the first side edge and the second side edge of the glass substrate to be tested; The third detector and the fourth detector move along the third side of the second glass substrate to be tested and the fourth side of the first glass substrate to be tested respectively under the driving action of the driver to complete the detection, The third detector and the fourth detector are located between the first glass substrate to be tested and the second glass substrate to be tested, and the third detector and the fourth detector perform a first synchronous movement, and the The speed of the first synchronous motion is the first speed, Among the two glass substrates to be detected at the same time, the first glass substrate to be tested is located in front of the predetermined direction of movement of the glass substrates, and the second glass substrate to be tested is located behind. 9. The edge detection method of a glass substrate according to claim 8, wherein the method for detecting two or more glass substrates is: The first detector and the second detector are fixedly arranged, the glass substrate to be tested moves along a preset direction to complete the detection of the first side and the second side of the glass substrate to be tested, and the movement speed of the glass substrate to be tested is second speed; The third detector and the fourth detector move along the third side of the second glass substrate to be tested and the fourth side of the first glass substrate to be tested respectively under the driving action of the driver to complete the detection, The third detector and the fourth detector are located between the first glass substrate to be tested and the second glass substrate to be tested, and the third detector and the fourth detector make a second synchronous movement, and the The speed of the second synchronous movement is the third speed, and the third speed is the sum of the first speed and the second speed, Among the two glass substrates to be detected at the same time, the first glass substrate to be tested is located in front of the predetermined direction of movement of the glass substrates, and the second glass substrate to be tested is located behind.