A through-type plate size detection device

Abstract

The present invention discloses a through-type plate size detection device, which belongs to the field of machine vision detection technology. The detection device includes a transmission device, a plurality of detection probes, a high-speed camera and a processor; the transmission device is used to drive the plate to be tested to be transmitted in one direction; the detection probe includes a laser emitting unit and an optical fiber transmission line, which are arranged in pairs above and below the plate to be tested; the laser emitting unit emits a point-focused laser to the optical fiber transmission line, and the optical fiber transmission line transmits the received laser signal to the imaging area of ​​the high-speed camera; the high-speed camera converts the laser signal and the captured image into a digital signal; the processor then calculates and processes the digital signal, thereby measuring the size of the plate to be tested. The present invention uses the detection probe and the high-speed camera to obtain the displacement signal of the plate to be tested and calculates the size of the plate through the processor in combination with the image, thereby improving the accuracy, speed and cost-effectiveness of the detection.

Description

Technical Field

[0001] The invention relates to the technical field of machine vision detection, and in particular to a through-type plate size detection device. Background Art

[0002] The high-precision online measurement of geometric dimensions of home panels, plastic panels, glass panels, metal panels, decorative wall panels, floor tiles, etc. is the key to their processing quality control. At present, digital high-speed industrial cameras are mainly used to obtain digital images of panels, and encoders are used to measure the real-time transmission speed of panels, and then the size of panels is calculated based on the imaging parameters, pixel distribution and motion parameters of the transmission mechanism. In view of the limitations of imaging technology and image processing technology, and the fact that the friction between the panel transmission mechanism and the encoder varies with factors such as ambient temperature and humidity, the encoder's relationship with the transmission panel is unstable; at the same time, the friction between the panel and the transmission surface varies with the size and speed of the panel, resulting in fluctuations in the position relationship of the transmission mechanism relative to the panel, which ultimately leads to low accuracy of the panel size measured by the existing digital image and encoder technology, which cannot meet the requirements of modern large-scale production for accurate online detection of the geometric dimensions of the transmission panel.

[0003] With respect to the problem of low accuracy of machine vision detection of panel dimensions in the above-mentioned prior art, no effective solution has been proposed so far. Summary of the invention

[0004] The object of the present invention is to provide a through-type plate size detection device for improving the online detection accuracy of plate size.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A through-type plate size detection device, comprising:

[0007] A conveying device, wherein the conveying device comprises a plurality of conveyor belts arranged in parallel, and gaps for installing detection probes are left between the plurality of conveyor belts;

[0008] A plurality of detection probes, each of which includes a laser emitting unit and an optical fiber transmission line, the optical fiber transmission line includes a signal input end and a signal output end, the laser emitting unit and the signal input end are arranged in pairs above and below the panel to be tested, and the signal output end is arranged in a preset manner in the imaging area of ​​the high-speed camera;

[0009] A high-speed camera, arranged above the conveying device, for photographing and imaging the output signals of the plurality of detection probes and converting them into digital signals;

[0010] The processor is connected to the high-speed camera and is used for calculating and processing the digital signal, so as to measure the size of the panel to be measured.

[0011] A through-type plate size detection device, comprising:

[0012] A conveying device, used for carrying and transporting the panel to be tested so that it moves in one direction; the conveying device comprises a plurality of conveyor belts arranged in parallel, with gaps between the plurality of conveyor belts;

[0013] A plurality of detection probes, used for detecting the front and rear edges of the plate to be tested; the plurality of detection probes are arranged along the conveying path of the plate; each of the detection probes comprises a laser emitting unit and an optical fiber transmission line, the optical fiber transmission line comprises a signal input end and a signal output end, the laser emitting unit and the signal input end are arranged in pairs above and below the plate to be tested, and the signal output end is arranged in a preset manner in the imaging area of ​​the high-speed camera;

[0014] A high-speed camera is used to capture images of output signals of multiple detection probes and the panels to be tested and convert them into digital signals;

[0015] The processor is connected to the high-speed camera and is used for calculating and processing the digital signal, so as to measure the size of the panel to be measured.

[0016] As a further improvement, it also includes an encoder, which includes a friction wheel, which is rollingly connected to the surface of the conveying device, or coaxially connected to the driving shaft of the conveying device; the encoder is synchronized with the speed of the conveying device and is used to send a sampling pulse signal to the high-speed camera; the sampling frequency of the high-speed camera always keeps the same frequency as the pulse signal sent by the encoder.

[0017] As a further improvement, two high-speed cameras are provided, one is an area array camera for capturing the output signals of multiple detection probes and converting them into digital signals, and the other is a line scan camera for capturing the image of the panel to be tested and converting it into digital signals; the processor receives the digital signals sent by the two high-speed cameras and combines the two to calculate the size of the panel to be tested.

[0018] As a further improvement, the high-speed camera is configured as a plurality of line scanning cameras arranged in a horizontal row, for performing zone-coordinated line scanning imaging of the output signals of the plurality of detection probes and the panel to be tested.

[0019] As a further improvement, the plurality of high-speed cameras are configured as a plurality of area array cameras arranged in a plurality of columns along a conveying direction, for performing partitioned area array imaging on the output signals of the plurality of detection probes and the panel to be tested.

[0020] As a further improvement, the conveyor belt includes any one of a synchronous belt, a conveyor belt and a roller conveyor line.

[0021] As a further improvement, the conveying device is divided into two sections in the conveying direction, with a gap between the two sections; the high-speed camera is provided directly below the gap to take images of the panel to be tested from below.

[0022] As a further improvement, the processor includes a sending module, and the sending module is used to send the detection result to the display terminal.

[0023] As a further improvement, the display terminal includes a mobile phone, a PC or a PAD.

[0024] Compared with the prior art, the present invention brings the following beneficial effects:

[0025] The laser emitting unit and the optical fiber transmission line of the present invention are respectively arranged above and below the transmission path of the panel to be tested. When the panel to be tested passes through the continuous optical path formed by the laser emitting unit and the optical fiber transmission line, the panel to be tested blocks the laser signal. The high-speed camera converts the continuous or blocked laser signal emitted by the detection probe into a digital signal and obtains the image of the panel to be tested. The processor receives the above digital signal and image signal and calculates the size of the panel to be tested according to a preset program. By adopting the technical solution of the present invention, a large number of high-precision panel digital signals can be obtained, thereby improving the size detection accuracy of the online transmission panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of the structure of a through-type plate size detection device provided by an embodiment of the present invention;

[0028] Figure 2 A schematic structural diagram of a pass-through plate size detection device provided by another embodiment of the present invention;

[0029] Figure 3 A schematic structural diagram of a through-type plate size detection device provided in a third embodiment of the present invention;

[0030] Figure 4 A schematic structural diagram of a through-type plate size detection device provided in a fourth embodiment of the present invention;

[0031] Figure 5 A schematic structural diagram of a through-type plate size detection device provided in a fifth embodiment of the present invention.

[0032] Description of the main component symbols in the accompanying drawings:

[0033] 10- conveyor belt; 12- detection probe; 14- high-speed camera; 14-1- area array camera; 14-2- line scan camera; 16- processor; 18- board to be tested; 20- laser emitting unit; 22- optical fiber transmission line; 30- encoder; 50- transmission mechanism; 52- imaging device. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] The present invention discloses a through-type panel size detection device, which is used to detect the geometric dimensions of panels such as home panels, plastic panels, glass panels, wall tiles, floor tiles, etc. The geometric dimensions include the length and width of the panels, the position, shape and size of the grooves and holes on the surface of the panels, etc.

[0040] Generally, the outer contour of the panel to be tested is rectangular, and its design dimensions are known in advance; there is an error between the actual panel dimensions and the design dimensions, and high-speed and high-precision detection is required.

[0041] The size of the panels to be tested ranges widely, from tens of millimeters to several meters.

[0042] Embodiment 1

[0043] See also Figure 1 This embodiment discloses a through-type plate size detection device, including a conveying device, a detection probe 12, a high-speed camera 14 and a processor 16.

[0044] The conveying device includes a plurality of parallel and synchronous conveyor belts 10 for conveying the panel 18 to be tested in a horizontal direction. Gaps are left between the plurality of conveyor belts 10 for installing the detection probes 12 .

[0045] The detection probe 12 is arranged in the gap between the conveyor belts 10, and the detection probe is composed of a laser emitting unit 20 and an optical fiber transmission line 22; the optical fiber transmission line 22 includes a signal input end and a signal output end, and the laser emitting unit 20 and the signal input end of the optical fiber transmission line 22 are respectively arranged above and below the transmission path of the board 18 to be tested, and the two constitute a continuous optical path. The signal output end is arranged in the imaging area of ​​the high-speed camera 14 in a preset manner. When the board 18 to be tested does not pass through the optical path formed by the laser emitting unit 20 and the signal input end, the laser emitted by the laser emitting unit 20 directly irradiates the signal input end, so that the optical fiber transmission line 22 obtains a continuous laser signal. When the board 18 to be tested passes through the optical path formed by the laser emitting unit 20 and the signal input end, the board 18 to be tested blocks the optical path, and the optical fiber transmission line 22 cannot obtain the laser.

[0046] The detection probe transmits the continuous or interrupted laser signal through the optical fiber transmission line to the signal output end arranged in an orderly manner in the imaging area of ​​the high-speed camera 14. The high-speed camera 14 captures the laser signal emitted by the detection probe at a speed of tens of thousands of times per second and converts it into a digital signal.

[0047] The processor 16 is connected to the high-speed camera 14, and is used to perform calculations based on the received digital signals: when the panel 18 to be tested is transmitted through the detection probe 12, the light path will be blocked during the period from the front edge to the end edge. Therefore, during this period of time, the light signal received by the optical fiber transmission line 22 is blocked. The processor obtains the time difference of the blocked light signal, and combines it with the transmission speed of the transmission equipment to calculate the length or width of the panel to be tested.

[0048] Embodiment 2

[0049] Please refer to Figure 2 This embodiment discloses a through-type plate size detection device, which includes a conveying device, a plurality of detection probes 12, a high-speed camera 14 and a processor 16.

[0050] See also Figure 2 In this embodiment, the conveying device includes five rows of conveyor belts 10 arranged in parallel and running synchronously, and a certain gap is left between each two adjacent rows of conveyor belts 10. Conveying shafts are respectively provided at the front and rear ends of the five rows of conveyor belts 10, and one of the conveying shafts is connected to the driving device to drive the entire conveying device to operate. The panel 18 to be tested is placed on the five rows of conveyor belts 10 and moves forward along with the transmission of the five rows of conveyor belts 10.

[0051] The detection probes 12 are provided in six numbers, and the six detection probes 12 are distributed in the belt gaps of the multi-row conveyor belts 10. The specific number of the detection probes 12 depends on the length of the panel 18 to be tested, the accuracy of the detection, and other requirements, and may be set to other numbers in other embodiments. The structure of each detection probe 12 is consistent with the structure in the first embodiment, and includes a laser emitting unit 20 located above the panel to be tested and an optical fiber transmission line 22 located below the conveying panel. The laser emitting unit of each detection probe 12 emits a point-focused laser to the optical fiber transmission line 22, and the signal output end of the optical fiber transmission line 22 arranges the received continuous or interrupted laser signals in an orderly manner in the imaging area of ​​the high-speed camera 14.

[0052] The high-speed cameras 14 are provided with two, one is a surface array camera 14-1, which is used to capture the laser signal transmitted from the signal output end of the multiple detection probes and convert it into a digital signal; the other is a line scanning camera 14-2, which is used to capture the image of the panel to be tested and convert it into a digital signal. The processor 16 receives the digital signals sent by the two high-speed cameras and combines the two to calculate the size of the panel to be tested.

[0053] It should be noted that the diameter of the laser spot emitted by the laser emitting unit 20 can reach 0.01 mm or less, and the laser signal is transmitted along the optical fiber transmission line and can be remotely collected to the imaging area of ​​the high-speed camera 14. The high-speed camera 14 can sample up to tens of thousands of pixels per second. When the high-speed camera 14 performs high-speed imaging of an array formed by arranging the signal output ends corresponding to the multiple optical fiber transmission lines 22, the laser signals emitted by different detection probes 12 at different times are quickly converted into digital signals, and the consistency of speed and accuracy improves the accuracy of size detection.

[0054] The imaging mode of the high-speed camera 14 can be selected from internal triggering or external triggering, and the operator can preset the imaging frequency of the high-speed camera 14. The internal triggering mode means that the high-speed camera 14 acquires images at inherent time intervals; the external triggering mode means that the sampling frequency of the high-speed camera 14 is determined by an external trigger signal, and it changes with the signal frequency of the external trigger. The present invention does not limit the triggering mode of the imaging of the high-speed camera 14.

[0055] Embodiment 3

[0056] See also Figure 3 This embodiment discloses a through-type plate size detection device, which includes a conveying device, a plurality of detection probes 12, a high-speed camera 14, an encoder 30 and a processor 16.

[0057] The structural arrangement of the transmission device and the plurality of detection probes 12 is consistent with that of the second embodiment, except that:

[0058] The high-speed camera 14 is disposed directly above the conveying device. In addition to receiving the optical signal sent by the detection probe 12, the high-speed camera 14 can also directly obtain the image of the panel 18 to be tested by taking a photo.

[0059] The encoder 30 is connected to the conveyor belt 10 and the high-speed camera 14 respectively.

[0060] Specifically, the friction wheel of the encoder 30 is coaxially connected to the driving shaft of the conveyor belt 10, or is connected to the conveying surface of the conveyor belt by rolling friction. Therefore, the encoder 30 can monitor the conveying speed of the conveyor belt 10 in real time. At the same time, the fluctuation of the conveying speed of the conveyor belt 10 caused by various uncertain factors can also be obtained by the encoder 30 and synchronously reflected in the pulse signal sent by the encoder 30.

[0061] In this embodiment, the high-speed camera 14 works in an externally triggered manner, and its sampling frequency is consistent with the frequency of the pulse signal emitted by the encoder 30. Therefore, the sampling frequency of the high-speed camera 14 is always synchronized with the transmission speed of the transmission mechanism to avoid distortion of the image of the panel to be measured obtained by the high-speed camera 14 due to changes in the transmission speed, thereby affecting the accuracy of the size calculation.

[0062] Therefore, the processor 16 in this embodiment can not only obtain the length information of the board 18 to be tested in the transmission direction through the laser signal transmitted by the detection probe 12, but also obtain the geometric information of the structures such as grooves and holes on the surface of the board 18 to be tested through the captured images, thereby expanding the function of this detection device.

[0063] As a further improvement, the processor 16 further includes a sending module, which is used to send the measured results to a display terminal. The display terminal can be a mobile phone, PC or PAD of an operator, so as to enable the operator to monitor the size and processing quality of the panel 18 to be measured in real time.

[0064] In the detection device of this embodiment, when the panel 18 to be tested is transmitted to the detection probe 12, the laser emitted by the laser emitting unit 20 is blocked by the panel 18 to be tested passing through, and the optical fiber transmission line 22 receives the continuous or blocked laser signals and transmits them to the imaging area of ​​the high-speed camera 14. The high-speed camera 14 obtains the laser signals of the detection probe 12 while obtaining the image of the panel 18 to be tested and converts them into digital signals. The processor 16 calculates the geometric dimensions of the panel based on the digital signals of the relevant image and laser signal transmitted by the high-speed camera 14, thereby improving the detection accuracy and cost-effectiveness.

[0065] Embodiment 4

[0066] See also Figure 4This embodiment discloses a through-type plate size detection device, including multiple conveyor belts 10, multiple detection probes 12, multiple high-speed cameras 14, an encoder 30 and a processor 16. In this embodiment, multiple high-speed cameras 14 and multiple detection probes 12 are used in combination.

[0067] The multiple high-speed cameras 14 can be line scan cameras or area array cameras. According to the detection accuracy requirements, the multiple high-speed cameras 14 are arranged in zones and form collaborative images. The line scan cameras refer to multiple high-speed cameras 14 arranged in a row transversely relative to the transmission direction; the area array cameras refer to multiple high-speed cameras 14 arranged in multiple columns longitudinally relative to the transmission direction.

[0068] For example, in one embodiment, the number of the multiple high-speed cameras 14 is 6, and the 6 high-speed cameras 14 are distributed in an L shape, with 3 cameras distributed along the conveying direction and 4 cameras distributed in the transverse direction.

[0069] Furthermore, the plurality of detection probes 12 are arranged along the conveying line of the conveyor belt 10, and a certain distance is spaced between every two adjacent detection probes 12. The plurality of high-speed cameras 14 are arranged at the starting half of the conveyor belt 10. When the front edge of the panel 18 to be tested triggers one of the detection probes 12, the plurality of high-speed cameras 14 just capture a high-resolution image of the tail of the panel 18 to be tested.

[0070] Taking the panel 18 to be tested with a total length of 1.8 meters as an example, the working principle of this embodiment is explained as follows:

[0071] The multiple detection probes 12 are arranged along the transmission line of the panel 18 to be tested as a "trigger" to trigger the imaging of the high-speed camera 14. The position accuracy of the detection probes 12 can reach 0.001mm. The positions of the multiple detection probes 12 are matched with the multiple high-speed cameras 14 in the transmission direction, and each high-speed camera 14 corresponds to several pre-set detection probes 12.

[0072] The panel 18 to be tested is transported forward from the initial conveying position. When its front edge is transmitted to the detection probe 12 located at 1.7 meters, the optical path of the detection probe 12 is blocked by the panel 18 to be tested. At this time, multiple high-speed cameras 14 are started and continuously shoot the tail of the panel 18 to be tested to obtain a high-resolution image of the tail of the panel. The processor 16 accurately calculates the length of the panel to be tested by combining the position of the front edge of the panel to be tested provided by the detection probe 12 and the high-resolution image of the tail of the panel.

[0073] In this embodiment, the detection probe 12 is used to determine the edge of the plate 18 to be tested, and the high precision of the laser signal can ensure the high precision of the edge measurement; the high-speed camera 14 is used to determine the length of the end section of the plate 18 to be tested, and the high resolution of the high-speed camera 14 can also ensure the high precision of the measurement. In this embodiment, the position signal of the plate 18 to be tested is obtained at high speed and high precision by using the detection probe 12 and the high-speed camera 14, and the size of the plate is calculated by the processor in combination with the image, thereby improving the accuracy, speed and cost-effectiveness of the detection.

[0074] Embodiment 5

[0075] See also Figure 5 This embodiment discloses a through-type plate size detection device, including a conveying mechanism 50 and an imaging device 52.

[0076] The conveying mechanism 50 is divided into two sections in the conveying direction, and a gap is left between the two sections of the conveying mechanism 50 .

[0077] The imaging device 52 is provided with a plurality of detection probes 12 and a plurality of high-speed cameras 14. The structure of the plurality of detection probes 12 and the plurality of high-speed cameras 14 is basically the same as that of the first to fourth embodiments, except that:

[0078] High-speed cameras 14 are provided above and below the conveying mechanism 50 , wherein the lower high-speed camera 14 is arranged along the gap between two sections of the conveying mechanism 50 , and is used to capture images of the same lateral position of the panel 18 to be tested, and transmit them to the processor 16 for processing.

[0079] The working principle of this embodiment is:

[0080] The panel to be tested is placed on the upper surface of the conveying mechanism 50 and is conveyed forward along with the conveying mechanism 50. When the panel 18 to be tested passes through the gap between the two sections of the conveying mechanism 50, the high-speed camera 14 located at the bottom takes photos and images of the panel 18 to be tested from bottom to top, and the high-speed camera 14 located at the top takes photos and images of the panel 18 to be tested from top to bottom.

[0081] The cooperation and working process between the detection probe 12 and the high-speed camera 14 inside the imaging device 52 are consistent with those of the first to fourth embodiments.

[0082] Finally, the processor 16 calculates the length and width of the panel 18 to be tested, as well as the size information of the geometric elements on the upper surface and the lower surface of the panel 18 to be tested, based on the image and the signal of the detection probe 12 .

[0083] In this embodiment, the conveying mechanism 50 is designed to be a segmented structure, and gaps are formed at the connecting parts for the high-speed camera 14 to take pictures, so that the size of the upper surface and the lower surface of the plate 18 to be tested can be detected simultaneously.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0085] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A through-type plate size detection device, characterized in that: include: A conveying device, wherein the conveying device comprises a plurality of conveyor belts arranged in parallel, and gaps for installing detection probes are left between the plurality of conveyor belts; A plurality of detection probes, each of which includes a laser emitting unit and an optical fiber transmission line, the optical fiber transmission line includes a signal input end and a signal output end, the laser emitting unit and the signal input end are arranged in pairs above and below the panel to be tested, and the signal output end is arranged in a preset manner in the imaging area of ​​the high-speed camera; A high-speed camera, arranged above the conveying device, for photographing and imaging the output signals of the plurality of detection probes in an external triggering manner and converting them into digital signals; A processor connected to the high-speed camera, used for calculating and processing the digital signal, so as to measure the size of the panel to be measured; the size includes length and width; The through-type plate size detection device also includes an encoder, which includes a friction wheel, which is rollingly connected to the surface of the conveying device, or coaxially connected to the driving shaft of the conveying device; the encoder is synchronized with the speed of the conveying device and is used to send a sampling pulse signal to the high-speed camera; the sampling frequency of the high-speed camera and the pulse signal sent by the encoder always keep the same frequency; Two high-speed cameras are provided, one is an area array camera, which is used to capture the output signals of multiple detection probes and convert them into digital signals, and the other is a line scan camera, which is used to capture the image of the panel to be tested and convert it into digital signals; the processor receives the digital signals sent by the two high-speed cameras and combines the two to calculate the size of the panel to be tested; Or the high-speed camera is configured as a plurality of line scanning cameras arranged in a horizontal row, for performing zone-coordinated line scanning imaging on the output signals of the plurality of detection probes and the panel to be tested; Or the high-speed camera is configured as a plurality of area array cameras arranged in a plurality of rows along the conveying direction, for performing partitioned area array imaging on the output signals of the plurality of detection probes and the panel to be tested.

2. A through-type plate size detection device, characterized in that: include: A conveying device, used for carrying and transporting the panel to be tested so that it moves in one direction; the conveying device comprises a plurality of conveyor belts arranged in parallel, with gaps between the plurality of conveyor belts; A plurality of detection probes, used for detecting the front and rear edges of the plate to be tested; the plurality of detection probes are arranged along the conveying path of the plate; each of the detection probes comprises a laser emitting unit and an optical fiber transmission line, the optical fiber transmission line comprises a signal input end and a signal output end, the laser emitting unit and the signal input end are arranged in pairs above and below the plate to be tested, and the signal output end is arranged in a preset manner in the imaging area of ​​the high-speed camera; A high-speed camera is used to capture images of output signals of multiple detection probes and the panels to be tested by external triggering and convert them into digital signals; A processor connected to the high-speed camera, used for calculating and processing the digital signal, so as to measure the size of the panel to be measured; the size includes length and width; The through-type plate size detection device also includes an encoder, which includes a friction wheel, which is rollingly connected to the surface of the conveying device, or coaxially connected to the driving shaft of the conveying device; the encoder is synchronized with the speed of the conveying device and is used to send a sampling pulse signal to the high-speed camera; the sampling frequency of the high-speed camera and the pulse signal sent by the encoder always keep the same frequency; Two high-speed cameras are provided, one is an area array camera, which is used to capture the output signals of multiple detection probes and convert them into digital signals, and the other is a line scan camera, which is used to capture the image of the panel to be tested and convert it into digital signals; the processor receives the digital signals sent by the two high-speed cameras and combines the two to calculate the size of the panel to be tested; Or the high-speed camera is configured as a plurality of line scanning cameras arranged in a horizontal row, for performing zone-coordinated line scanning imaging on the output signals of the plurality of detection probes and the panel to be tested; Or the high-speed camera is configured as a plurality of area array cameras arranged in a plurality of rows along the conveying direction, for performing partitioned area array imaging on the output signals of the plurality of detection probes and the panel to be tested.

3. The through-type plate size detection device according to any one of claims 1 to 2, characterized in that: The conveyor belt includes any one of a synchronous belt, a conveyor belt and a roller conveyor line.

4. The through-type plate size detection device according to claim 3, characterized in that: The conveying device is divided into two sections in the conveying direction, with a gap between the two sections; the high-speed camera is arranged directly below the gap to take pictures of the panel to be tested from below.

5. The through-type plate size detection device according to any one of claims 1 to 2, characterized in that: The processor includes a sending module, and the sending module is used to send the detection result to the display terminal.

6. The through-type plate size detection device according to claim 5, characterized in that: The display terminal includes a mobile phone, a PC or a PAD.

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