Vertical detection device for hourglass-shaped holes in translucent panels

Abstract

A vertical detection device for hourglass-shaped holes in a light-transmitting sheet includes: a housing; a magnification lens group; an optical lens group; a light source; a camera; a sheet carrier for supporting a light-transmitting sheet, the light-transmitting sheet having a plurality of hourglass-shaped holes; a reflector located below the light-transmitting sheet; and a microcontroller unit storing detection logic, the detection logic having the following contents for the microcontroller unit to execute: controlling the camera to capture an image of the light-transmitting sheet to obtain an image having a plurality of dark rings, each dark ring having an inner circular edge and an outer circular edge, and the microcontroller unit calculating the roundness and diameter of the inner circular edge of each dark ring, and calculating the roundness and diameter of the outer circular edge of each dark ring.

Description

[Technical Field]

[0001] This invention relates to the perforation detection technology of light-transmitting panels, and in particular to a vertical detection device for hourglass-shaped holes in light-transmitting panels. [Previous Technology]

[0002] Taiwan Patent No. TW I865375 discloses a device and method for detecting the waist depth of perforations in a TGV glass substrate. The key technical point of this case is that a camera and a light source are placed above and below the glass substrate, respectively, and then obliquely facing the lower and upper surfaces of the glass substrate. By illuminating the substrate with the oblique light source and capturing images with the oblique camera, the detection result of the perforation in the glass substrate is obtained. The result obtained is the waist depth of the perforation.

[0003] The aforementioned technology does not mention how to detect such perforations in a vertical manner. When taking images in a vertical manner, these perforations will have an hourglass-like structure due to their processing method, that is, the diameter is large at both ends and small in the middle. Therefore, whether the ends and the middle of these perforations are circular, how much the diameter of the middle and the ends differs, and even whether the center of the ends and the middle of these perforations is on the normal of the glass substrate, can all be detected by taking images in a vertical manner. Therefore, how to detect these hourglass-shaped perforations in the vertical direction has become a problem to be solved. [Summary of the Invention]

[0004] The main objective of this invention is to provide a vertical detection device for hourglass-shaped holes in light-transmitting panels, which can detect hourglass-shaped holes in light-transmitting panels in a vertical direction.

[0005] Another objective of the present invention is to provide a vertical detection device for hourglass-shaped holes in a light-transmitting sheet, which can detect the roundness of the hourglass-shaped holes and whether the diameters of each hourglass-shaped hole are consistent.

[0006] To achieve the above objective, the present invention provides a vertical detection device for hourglass-shaped holes in a light-transmitting plate, comprising: a housing; a magnifying lens assembly disposed in the housing and located below the housing; an optical lens assembly disposed within the housing; a light source disposed within the housing for emitting light that passes through the optical lens assembly and the magnifying lens assembly and exits the housing downwards; a camera disposed in the housing; a plate carrier located below the housing for supporting a light-transmitting plate, the light-transmitting plate having a plurality of hourglass-shaped holes extending vertically and having a cross-section resembling an upright hourglass, at least one of the hourglass-shaped holes on the plate carrier being located directly below the magnifying lens assembly; and a reflector located below the light-transmitting plate, the light emitted by the light source passing through the magnifying lens assembly and exiting the housing downwards. Then, the light penetrates the light-transmitting plate and shines on the reflector, then is reflected by the reflector and penetrates the light-transmitting plate, and then enters the housing through the magnification lens group. The camera uses the optical lens group to capture an image of the light entering the housing. A microcontroller unit is electrically connected to the camera. The microcontroller unit stores a detection logic, which has the following contents for the microcontroller unit to execute: control the camera to capture an image of the light-transmitting plate located directly below the magnification lens group to obtain an image. The image has a plurality of dark rings, each dark ring corresponding to an hourglass-shaped hole, and each dark ring has an inner circular edge and an outer circular edge. The microcontroller unit calculates the roundness and diameter of the inner circular edge of each dark ring, and calculates the roundness and diameter of the outer circular edge.

[0007] Accordingly, the present invention can detect the hourglass-shaped holes of the light-transmitting plate in a vertical direction, and can also detect the roundness of the hourglass-shaped holes and whether the diameter of each hourglass-shaped hole is consistent.

Implementation Method

[0008] To illustrate the technical features of the present invention in detail, the following preferred embodiments are described in conjunction with the accompanying drawings, wherein:

[0009] As shown in Figures 1 to 5, the present invention, through a first preferred embodiment, describes a vertical detection device 10 for an hourglass-shaped hole in a light-transmitting plate, which mainly comprises a housing 11, a magnification lens group 21, an optical lens group 31, a light source 41, a camera 51, a plate carrier 61, a reflector 71, and a microcontroller unit 81, wherein:

[0010] The magnification lens group 21 is disposed on the housing 11 and located below the housing 11.

[0011] The optical lens assembly 31 is disposed within the housing 11. In this first embodiment, the optical lens assembly 31 has a half-reflector 32.

[0012] The light source 41 is disposed inside the housing 11 and is used to emit light that passes through the optical lens group 31 and the magnification lens group 21 and is emitted downward out of the housing 11.

[0013] The camera 51 is mounted on the housing 11 and is used to capture an image of the light passing through the semi-reflecting mirror 32 of the optical lens group 31. Since the optical technology of the light source 41 and the camera 51 illuminating and capturing images through the semi-reflecting mirror 32 of the optical lens group 31 is known technology, it is not necessary to describe it in detail.

[0014] The plate carrier 61, located below the housing 11, supports a light-transmitting plate 91. The light-transmitting plate 91 has a plurality of hourglass-shaped holes 92 that extend vertically and have an upright hourglass-shaped cross-section. At least one of the hourglass-shaped holes 92 on the plate carrier 61 is located directly below the magnification lens assembly 21. The light-transmitting plate 91 can be made of transparent or translucent material, as long as it allows light to pass through.

[0015] The reflector 71 is located below the light-transmitting plate 91. The light emitted by the light source 41 passes through the magnification lens group 21 and exits the housing 11. It then penetrates the light-transmitting plate 91 and illuminates the reflector 71. The light is then reflected by the reflector 71 and penetrates the light-transmitting plate 91 again before entering the housing 11 through the magnification lens group 21. The camera 51 uses the optical lens group 31 to capture an image of the light entering the housing 11. In this first embodiment, the reflector 71 rests against the bottom of the light-transmitting plate 91, and there is no distance between them.

[0016] The microcontroller unit 81 is electrically connected to the camera 51. The microcontroller unit 81 stores a detection logic 82. The detection logic 82 has the following contents for the microcontroller unit 81 to execute: control the camera 51 to capture an image 95 of the light-transmitting plate 91 located directly below the magnification lens group 21. The image 95 has a plurality of dark rings 96. Each dark ring 96 corresponds to an hourglass-shaped hole 92. Each dark ring 96 has an inner circular edge 961 and an outer circular edge 962. The microcontroller unit 81 calculates the roundness and diameter of the inner circular edge 961 of each dark ring 96, and calculates the roundness and diameter of the outer circular edge 962 of each dark ring 96.

[0017] The inner edge 961 of each of the aforementioned dark rings 96 represents the waist edge of the hourglass-shaped hole 92, while the roundness of the outer edge 962 represents the top edge of the hourglass-shaped hole 92. When the roundness of both is good, it means that the hole shape is good and there is no damage. If the roundness is poor, it means that the hole shape is poor and there may be damage or poor processing. Calculating the diameter of the inner edge 961 and the outer edge 962 can determine whether the hole size meets the expectations.

[0018] In this first embodiment, the detection logic 82 may further include the following: calculating the distance between the center 961O and 962O of the inner edge 961 and the outer edge 962 of each dark ring 96 when it is located directly below the magnification lens group 21. This part can detect whether the hourglass-shaped hole 92 corresponding to the dark ring 96 is perpendicular to the light-transmitting plate 91. If the center of the inner edge 961 and the outer edge 962 overlaps without any distance, it means that the corresponding hourglass-shaped hole 92 is perpendicular to the light-transmitting plate 91. If they do not overlap but have a distance, it means that the corresponding hourglass-shaped hole 92 is tilted relative to the light-transmitting plate 91.

[0019] The technical focus of this first embodiment has been explained above. The operational status of this first embodiment will be explained next.

[0020] As shown in Figures 1 to 5, before detection, a light-transmitting plate 91 with multiple hourglass-shaped holes 92 is placed on a plate carrier 61 for support and movement. The plate carrier 61 is moved so that the light-transmitting plate 91 moves directly below the magnification lens group 21. Then, the light source 41 is controlled to emit light and illuminate the plate, and the microcontroller unit 81 is controlled to execute the detection logic 82, thereby controlling the camera 51 to capture an image 95 perpendicularly onto the light-transmitting plate 91. In practice, the microcontroller unit 81 can use known image processing techniques to process the images of each dark ring 96 to obtain graphic data of its inner circular edge 961 and outer circular edge 962 for subsequent calculations. The microcontroller unit 81 uses the inner circular edge 961 and outer circular edge 962 to calculate its roundness and diameter, thereby determining whether the hole shape is good and whether the hole size is correct. In addition, the presence or distance between the centers 961O and 962O of the inner edge 961 and the outer edge 962 can be used to determine whether the hourglass-shaped hole 92 corresponding to the dark ring 96 is perpendicular to the light-transmitting plate 91.

[0021] As can be seen from the above, this first embodiment can indeed detect the hourglass-shaped holes 92 of the light-transmitting plate 91 in a vertical direction, and can also detect the roundness of the hourglass-shaped holes 92 and whether the diameters of each hourglass-shaped hole 92 are consistent. Furthermore, it can also detect whether the hourglass-shaped holes 92 are perpendicular to the light-transmitting plate 91. In addition, after the detection is completed, the light-transmitting plate 91 can be flipped over and detected again.

[0022] As shown in Figure 6, the present invention describes a vertical detection device 10' for an hourglass-shaped hole of a light-transmitting plate 91' through a second preferred embodiment, which is mainly the same as the first embodiment described above, except that:

[0023] The reflector 71' and the light-transmitting plate 91' are not in abutting position, but rather the bottom of the reflector 71' and the light-transmitting plate 91' are separated by a predetermined distance, and the distance is not greater than three times the thickness of the light-transmitting plate 91'. In this second embodiment, one times is taken as an example.

[0024] In this second embodiment, after the light from the light source 41' is emitted from the magnification lens group 21' and passes through the light-transmitting plate 91' to illuminate the reflector 71', it will be reflected by the reflector 71' and pass through the light-transmitting plate 91' again. A portion of the light will enter the magnification lens group 21' for image acquisition. However, the structure in this second embodiment where the reflector 71' is separated from the light-transmitting plate 91' causes some scattering of the light that passes through the light-transmitting plate 91' and illuminates the reflector 71'. Therefore, the imaging effect of the light reflected by the reflector 71' and passing through the light-transmitting plate 91' again is slightly worse than in the first embodiment. However, this slight difference is acceptable. Since a greater distance results in a more pronounced scattering effect and also extends the illumination distance, it is preferable that the separation distance not exceed three times the thickness of the light-transmitting plate 91'.

[0025] The remaining structures and effects of this second embodiment are the same as those of the first embodiment described above, and will not be repeated hereafter.

[0026] The above description is merely an illustration of the present invention through embodiments and cannot be used to limit the scope of the patent application of the present invention. Any simple variations or equivalent implementations made in accordance with the scope of the patent application of the present invention and the contents of the patent specification should be covered by the scope of the patent application of the present invention. [Simplified Explanation of the Diagram]

[0027] Figure 1 is a structural schematic diagram of the first preferred embodiment of the present invention. Figure 2 is a partial cross-sectional view of the light-transmitting plate of the first preferred embodiment of the present invention. Figure 3 is an image of the light-transmitting plate of the first preferred embodiment of the present invention. Figure 4 is a partial enlarged view of Figure 3. Figure 5 is a circuit block schematic diagram of the first preferred embodiment of the present invention. Figure 6 is a structural schematic diagram of the second preferred embodiment of the present invention.

Claims

1. A vertical detection device for hourglass-shaped holes in a light-transmitting sheet, comprising: a housing; a magnification lens assembly disposed in the housing and located below the housing; an optical lens assembly disposed within the housing; a light source disposed within the housing for emitting light that passes through the optical lens assembly and the magnification lens assembly and exits downwards from the housing; a camera disposed in the housing; and a sheet carrier located below the housing for supporting a light-transmitting sheet, the light-transmitting sheet having a plurality of hourglass-shaped holes extending vertically and having a cross-section resembling an upright hourglass, wherein at least one of the hourglass-shaped holes on the sheet carrier is located directly below the magnification lens assembly; A reflector is located below the light-transmitting plate. Light emitted by the light source is emitted downwards from the housing through the magnifying lens group, passes through the light-transmitting plate, and illuminates the reflector. The light is then reflected by the reflector and passes through the light-transmitting plate again before entering the housing through the magnifying lens group. The camera uses the optical lens group to capture an image of the light entering the housing. A microcontroller unit is electrically connected to the camera. The microcontroller unit stores a detection logic, which has the following content for the microcontroller unit to execute: controlling the camera to capture an image of the light-transmitting plate located directly below the magnifying lens group to obtain an image. The image has a plurality of dark rings, each of which corresponds to an hourglass-shaped hole. Each dark ring has an inner circular edge and an outer circular edge. The microcontroller unit calculates the roundness and diameter of the inner circular edge and the roundness and diameter of the outer circular edge of each dark ring.

2. The hourglass-shaped hole vertical detection device according to claim 1, wherein: The detection logic further includes: calculating the distance between the center of the inner circle edge and the center of the outer circle edge when each dark ring is located directly below the magnification lens group.

3. The hourglass-shaped hole vertical detection device according to claim 1, wherein: The reflector rests against the bottom of the light-transmitting plate, and there is no distance between them.

4. The hourglass-shaped hole vertical detection device for the light-transmitting sheet material as described in claim 1, wherein: The reflector is positioned at a distance from the bottom of the light-transmitting plate, the distance being no more than three times the thickness of the light-transmitting plate.

5. The hourglass-shaped hole vertical detection device for the light-transmitting sheet material as described in claim 1, wherein: The optical lens assembly has a half-reflector, and the camera captures an image of the light passing through the half-reflector of the optical lens assembly.

Images