Plate drop detection system for a production apparatus

Abstract

A kind of board drop detection system for production equipment, it can detect the drop of board arranged on production equipment and include light detector and signal processor, production equipment includes conveying track and has side wall, light detector includes emitting unit arranged below conveying track and used to emit detection light parallel to conveying track towards side wall, and receiving unit is used to receive the reflection of detection light and has installation distance with emitting unit, emitting unit and side wall have preset reflection distance between, reflection and the connection between receiving unit and emitting unit form reflection angle, signal processor calculates the reflection distance of detection light according to installation distance and reflection angle, when reflection distance is different from default reflection distance, signal processor judges that board drops from conveying track and generates board drop signal;Therefore, the present application effectively detects the drop of board arranged on production equipment, improves efficiency, reduces cost and avoids damage.

Description

Technical Field

[0001] This invention relates to a detection system, and more particularly to a board drop detection system used in circuit board manufacturing for production equipment. Background Technology

[0002] With the rapid development of industry, many electronics manufacturing companies have gradually moved towards equipment automation. The production of printed circuit boards (PCBs) includes surface mount technology (SMT) and dual in-line package (DIP) processes to solder electronic components / parts onto the PCBs.

[0003] Generally, SMT and DIP manufacturing lines consist of multiple production machines interconnected by tracks or conveyor belts. Printed circuit boards (PCBs) are placed on these tracks or conveyor belts and sequentially fed into each machine for processing, forming an automated production line. However, during the movement of the PCBs, the tracks or conveyor belts may vibrate due to the vibrations generated by the operating equipment, causing the PCBs to shift or deviate, or even fall off the tracks or conveyor belts. Furthermore, since some production equipment may not have transparent viewing areas, line workers cannot see the internal conditions in real time. Therefore, when PCBs fall, or even fall continuously, they may not be immediately detected, reducing efficiency and increasing material costs. Moreover, continuous falling PCBs can also damage components inside the production equipment.

[0004] Therefore, it is necessary to develop a detection mechanism for falling boards to solve the problems of previous technologies. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a board drop detection system for production equipment, which can solve the problems of the prior art, effectively detect the drop of boards installed on the production equipment, improve efficiency, reduce costs, and avoid damage.

[0006] To achieve the above objectives, the present invention discloses a board drop detection system for production equipment, used to detect the drop of a board disposed on a production equipment. The production equipment has a side wall and includes a conveyor rail for carrying the board, and the side wall is located on one side of the conveyor rail in the direction of movement. The board drop detection system is characterized by comprising:

[0007] A light detector is disposed on the opposite side of the conveyor track relative to the sidewall, the light detector comprising:

[0008] A transmitting unit is disposed below the conveying track and emits a detection light parallel to the conveying track toward the sidewall. The detection light has a detection area that covers the area of ​​the conveying track. A predetermined reflection distance exists between the transmitting unit and the sidewall.

[0009] A receiving unit is disposed below the transmitting unit and at a mounting distance from the transmitting unit. The receiving unit receives a reflected light from the detection light, wherein the reflected light forms a reflection angle with the line connecting the receiving unit and the transmitting unit.

[0010] A signal processor, connected to the photodetector, is used to calculate a reflection distance of the detected light based on the installation distance and the reflection angle;

[0011] When the reflection distance calculated by the signal processor is different from the preset reflection distance, the signal processor determines that the plate has fallen from the conveyor track and generates a plate drop signal.

[0012] The device further includes a rotating mechanism, and the emitting unit is disposed on the rotating mechanism. The emitting unit is used to emit a straight laser beam. The rotating mechanism swings back and forth in a horizontal rotation manner so that the straight laser beam emitted by the emitting unit forms the detection light.

[0013] The device further includes a beam expander disposed between the emitting unit and the sidewall. The emitting unit emits a straight laser beam, and the straight laser beam passes through the beam expander to form the detection beam.

[0014] The emitting unit is a laser diode.

[0015] It further includes an alarm device connected to the signal processor, which generates an alarm message based on the board drop signal.

[0016] It further includes a controller connected to the signal processor and the production equipment, the controller being used to control the production equipment to stop operating based on the board drop signal.

[0017] The device further includes a storage unit connected to the signal processor. When the signal processor determines that the board has fallen from the conveyor track, the signal processor generates a board drop time corresponding to the board drop signal and stores the board drop signal and the board drop time in the storage unit.

[0018] The detection light includes multiple linear laser beams. The receiving unit receives multiple reflected beams from the material when the linear laser beams illuminate the material. Multiple material reflection angles are formed between the reflected beams and the line connecting the receiving unit and the transmitting unit. The signal processor generates multiple material reflection distances corresponding to the reflected beams based on the installation distance and the material reflection angles, and stores these material reflection distances in the storage unit.

[0019] The device further includes an imaging unit connected to the storage unit, which generates a drop image of the corresponding material based on the drop time and the reflection distance of the materials.

[0020] The conveying track includes a first conveying track and a second conveying track, and the first conveying track and the second conveying track are arranged parallel to each other.

[0021] In summary, the board drop detection system for production equipment of the present invention can emit detection light covering the area of ​​the conveyor track through a photodetector, and detect changes in the reflection distance through a signal processor to comprehensively detect board drops, thereby improving detection efficiency and accuracy. Furthermore, the board drop detection system of the present invention can also calculate the position and distance of the board drop using a detection light with a detection area containing multiple laser beams and a signal processor, thereby improving detection efficiency. Moreover, the board drop detection system of the present invention can generate and integrate all time points of board drops and drop images through an imaging unit, allowing production line personnel or technicians to view and analyze them, thereby improving convenience and practicality. In addition, the board drop detection system of the present invention can also generate warning messages and control the production equipment to stop operation when a board drops, through an alarm and controller, to remind production line personnel and prevent continuous board drops, thereby improving efficiency and saving costs. Attached Figure Description

[0022] Figure 1 A functional block diagram of a board drop detection system for production equipment according to a specific embodiment of the present invention is shown.

[0023] Figure 2A A schematic diagram of a light detector, production equipment, and sheet material for a sheet drop detection system for production equipment, according to a specific embodiment of the present invention, is shown.

[0024] Figure 2B Showing Figure 2A A schematic diagram of the optical detector, sidewalls, and sheet metal from one perspective.

[0025] Figure 2C Showing Figure 2A A schematic diagram of the light detector, sidewalls, and panels from another perspective.

[0026] Figure 3 A schematic diagram showing a sheet falling from a conveyor track according to a specific embodiment of the present invention is shown.

[0027] Figure 4 Showing Figure 3 A schematic diagram from another perspective.

[0028] Figure 5 A schematic diagram showing an image of a sheet material falling off according to a specific embodiment of the present invention is provided.

[0029] Figure 6 A schematic diagram of a photodetector and a rotating mechanism according to a specific embodiment of the present invention is shown.

[0030] Figure 7 A schematic diagram of a board drop detection system according to a specific embodiment of the present invention is shown. Detailed Implementation

[0031] To make the advantages, spirit, and features of the present invention more easily and clearly understood, detailed descriptions and discussions will follow with reference to specific embodiments and the accompanying drawings. It is important to note that these specific embodiments are merely representative examples of the present invention, and the specific methods, apparatuses, conditions, materials, etc., exemplified are not intended to limit the present invention or the corresponding specific embodiments. Furthermore, the devices in the figures are only used to illustrate their relative positions and are not drawn to scale; this is to be stated beforehand.

[0032] In the description of this specification, references to terms such as "one embodiment," "another embodiment," or "part of an embodiment," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment is included in at least one embodiment of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0033] Please refer to the following: Figure 1 , Figure 2A , Figure 2B and Figure 2C . Figure 1 A functional block diagram of a board drop detection system 1 according to a specific embodiment of the present invention is shown. Figure 2A A schematic diagram of a photodetector 11, production equipment 8, and board material 9 of a board drop detection system 1 according to a specific embodiment of the present invention is shown. Figure 2B Showing Figure 2A A schematic diagram of the optical detector 11, sidewall 81 and plate 9 from one perspective. Figure 2C Showing Figure 2A A schematic diagram of the light detector 11, sidewall 81, and plate 9 from another perspective.

[0034] The board drop detection system 1 of the present invention is used to detect the drop of board material 9 installed on production equipment 8. For example... Figures 2A to 2C As shown, the production equipment 8 has a sidewall 81 and includes a conveyor track 82. The conveyor track 82 is used to attach the circuit board 9, and the sidewall 81 is located on one side of the conveyor track 82 in the direction of movement. In practice, the production equipment 8 may include a housing 80, and the housing 80 has an inlet and an outlet that are opposite to each other and communicate with each other. The conveyor track 82 may pass through the inlet and outlet and straddle the housing 80. The conveyor track 82 may be a conveyor belt and may move from the inlet to the outlet, i.e., move in the direction of the +X axis (as shown by the arrow in the figure), while the sidewall 81 may be the inner wall of the housing 80 at the outlet. Therefore, the conveyor track 82 can carry and move the board 9 to the production equipment 8 for processing. Further, the conveyor track 82 may include a first conveyor track 821 and a second conveyor track 822, and the first conveyor track 821 and the second conveyor track 822 are arranged parallel to each other. In practice, the distance between the first conveying track 821 and the second conveying track 822 can correspond to the size of the sheet 9, so that the sheet 9 can be placed across the first conveying track 821 and the second conveying track 822. When the production equipment 8 is a welding equipment, the dual-track conveying track 82 can avoid obscuring too much of the surface of the sheet 9, thus facilitating the welding of the sheet 9.

[0035] like Figure 1 as well as Figures 2A to 2C As shown, in this specific embodiment, the board drop detection system 1 of the present invention includes a photodetector 11, disposed on the other side of the conveyor track 82 opposite to the side wall 81, and includes a transmitting unit 111 and a receiving unit 112. The transmitting unit 111 is disposed below the conveyor track 82 and emits detection light parallel to the conveyor track 82 toward the side wall 81 (shown as dashed lines in the figure). The receiving unit 112 is disposed below the transmitting unit 111 and receives the reflected light of the detection light. In practice, the photodetector 11 can be a laser sensor, and the photodetector 11 can be disposed outside the housing 80 and located at the entrance. Further, the transmitting unit 111 can be disposed parallel to the lower side of the conveyor track 82, and the receiving unit 112 can be disposed parallel to the lower side of the transmitting unit 111, that is, the transmitting unit 111 is located between the conveyor track 82 and the receiving unit 112. The transmitting unit 111 can emit detection light through the inlet to the side wall 81 at the outlet. That is, the detection light emitted by the transmitting unit 111 can detect the position below the conveyor track 82 inside the production equipment 8. The receiving unit 112 can also receive the reflected light of the detection light through the inlet.

[0036] In practice, the transmitting unit 111 and receiving unit 112 of the detector 11 are not limited to emitting detection light through the inlet and receiving reflected detection light. The housing 80 may further include a detection aperture (not shown) located below the inlet. The transmitting unit 111 can emit detection light through the detection aperture to the side wall 81 at the outlet, and the receiving unit 112 can receive reflected detection light through the detection aperture.

[0037] In this specific embodiment, the detection light emitted by the emitting unit 111 has a detection area, and the detection area covers the area of ​​the conveyor track 82. In practice, the emitting unit 111 of the photodetector 11 can emit a fan-shaped light field with a detection area to detect the position below the conveyor track 82 inside the production equipment 8 (e.g., Figure 2B (As shown). The area of ​​the conveying track 82 can be a rectangular region bounded by the first conveying track 821 and the second conveying track 822. The emitting unit 111 can adjust the detection area of ​​the detection light through structural or angular design so that the detection area of ​​the detection light is larger than and covers the area of ​​the conveying track 82. Therefore, regardless of whether the plate 9 on the conveying track 82 falls from the outside of the first conveying track 821, the outside of the second conveying track 822, or the gap between the first conveying track 821 and the second conveying track 822, the plate 9 will pass through the detection light emitted by the emitting unit 111.

[0038] In this specific embodiment, there is an installation distance Di between the transmitting unit 111 and the receiving unit 112. In practice, the installation distance Di can be determined according to the model or specifications of the photodetector 11, or designed according to the device size or installation space. When the transmitting unit 111 emits detection light to the sidewall 81, the sidewall 81 reflects the detection light to form reflected light. Since light has the characteristic of scattering, the reflected light after being reflected by the sidewall 81 will be scattered in all directions. Furthermore, since the receiving unit 112 is located below the transmitting unit 111 and has an installation distance Di, the reflected light received by the receiving unit 112 is not parallel to the detection light emitted by the transmitting unit 111, and the reflected light forms a reflection angle A0 between the line connecting the receiving unit 112 and the transmitting unit 111.

[0039] In this specific embodiment, the signal processor 12 is connected to the photodetector 11 and calculates the reflection distance of the detected light based on the installation distance Di and the reflection angle. Further, the transmitting unit 111 and the sidewall 81 have a preset reflection distance D0. In practice, the signal processor 12 can be a signal processing chip with computing capabilities and can communicate with the photodetector 11 via wired or wireless connection. The signal processor 12 can calculate the reflection distance of the detected light using triangulation. When the transmitting unit 111 emits the detected light to the sidewall 81 and the receiving unit 112 receives the reflected light after reflection from the sidewall 81, and the reflection angle A0 formed between the receiving unit 112 and the line connecting the transmitting unit 111, the signal processor 12 can generate the reflection distance between the transmitting unit 111 and the sidewall 81 based on the installation distance Di and the reflection angle A0, which is the preset reflection distance D0. In practice, the transmitting unit 111 continuously emits detection light and the receiving unit 112 continuously receives the reflected light from the detection light. Therefore, the signal processor 12 continuously calculates the reflection distance. That is to say, under normal production conditions, the reflection distance calculated by the signal processor 12 for both the production equipment 8 and the board 9 is the preset reflection distance D0.

[0040] Please see Figure 3 . Figure 3 A schematic diagram of a sheet 9 falling from a conveyor track 82 according to a specific embodiment of the present invention is shown. In practice, when the sheet 9 falls from the conveyor track 82 inside the production equipment 8 due to vibration or other factors during processing, the sheet 9 comes into contact with the detection light emitted by the transmitting unit 111. Further, when the sheet 9 comes into contact with the detection light, the sheet 9 blocks part of the detection light, so that the detection light can only illuminate the sheet 9 and cannot illuminate the side wall 81. At this time, the sheet 9 reflects the detection light to form the reflected light of the sheet 9, and the reflected light of the sheet 9 forms a reflection angle A between the line connecting the receiving unit 112 and the transmitting unit 111. At the same time, the signal processor 12 also calculates and generates the reflection distance D between the transmitting unit 111 and the sheet 9 based on the installation distance Di and the reflection angle A. Since the sheet 9 falls from the conveyor track 82 inside the production equipment 8, the angle at which the receiving unit 112 receives the reflected light from the side wall 81 is different from the angle at which the reflected light from the sheet 9 is received. Therefore, the reflection distance D calculated by the signal processor 12 is different from the preset reflection distance D0. At this time, the signal processor 12 can detect and determine that the board 9 has fallen from the conveyor track 82 and generate a board drop signal. Therefore, the board drop detection system of the present invention can emit detection light covering the area of ​​the conveyor track through a photodetector and detect changes in the reflection distance through a signal processor to detect board drop from all angles, thereby improving detection efficiency and accuracy.

[0041] Furthermore, in practice, when the reflection distance D calculated by the signal processor 12 is different from the preset reflection distance D0 and a board drop signal is generated, the signal processor 12 can also generate and record the board drop time of the corresponding board drop signal.

[0042] Please see Figure 3 and Figure 4 . Figure 4 Showing Figure 3 A diagram from another perspective. (For example...) Figure 4 As shown, in this specific embodiment, the detection light emitted by the transmitting unit 111 includes multiple straight laser beams. The receiving unit 112 receives the reflected light from the multiple straight laser beams, and the reflected light from the multiple straight laser beams forms multiple reflection angles with the line connecting the receiving unit 112 and the transmitting unit 111. The signal processor 12 generates multiple reflection distances based on the installation distance and the multiple reflection angles. In practice, the transmitting unit 111 can be a laser diode, and the laser diode can include multiple laser chips that emit multiple straight laser beams at different horizontal emission angles to form a detection light with a detection area. Figure 3 and Figure 4 As shown, when the plate 9 falls from the conveyor track 82, it blocks multiple linear laser beams. Specifically, when the plate 9 reflects a linear laser beam with a horizontal emission angle, and the reflected beam from the plate forms a plate reflection angle with the line connecting the receiving unit 112 and the transmitting unit 111, the signal processor 12 can calculate and generate the plate reflection distance between the transmitting unit 111 and the plate 9 based on the installation distance Di and the plate reflection angle. Furthermore, the signal processor 12 can further calculate and generate the plate reflection distances of the plate 9 in the X-axis and Y-axis directions based on the plate reflection distance and the horizontal emission angle. Similarly, when the plate 9 blocks and reflects multiple linear laser beams with different horizontal emission angles, the signal processor 12 can calculate the plate reflection distances of the plate 9 in the X-axis and Y-axis directions corresponding to each linear laser beam. Please note that... Figure 4 The number of dashed lines in the diagram is only for illustrative purposes; in practice, the number of straight laser beams is greater than [a certain number]. Figure 4 The number of dotted lines in the diagram. Therefore, the board drop detection system of the present invention can calculate the position and distance of the board drop using a detection light with a detection area containing multiple laser beams and a signal processor, thereby improving detection efficiency.

[0043] Please refer to the following: Figure 1 , Figure 4 and Figure 5 . Figure 5 A schematic diagram showing a dropped image of a sheet metal 9 according to a specific embodiment of the present invention is provided. Figure 1As shown, in this specific embodiment, the board drop detection system 1 includes a storage unit 13 connected to a signal processor 12. In practice, the storage unit 13 can be a buffer, cache, random access memory, hard disk, tape drive, optical drive, etc., and the signal processor 12 can store the board drop signal, board drop time, calculated reflection distance, and the aforementioned calculated multiple board reflection distances in the storage unit 13.

[0044] Furthermore, in this specific embodiment, the board drop detection system 1 includes an imaging unit 14 connected to a storage unit 13. The imaging unit 14 is used to generate a board drop image of the corresponding board 9 based on the board drop time and the reflection distance of multiple boards. In practice, such as Figure 4 and Figure 5 As shown, after the sheet 9 falls from the conveyor track 82, the signal processor 12 calculates the reflection distances of multiple corresponding sheet reflections in the X-axis and Y-axis directions based on the multiple sheet reflections, and stores these distances, along with the drop time, in the storage unit 13. Next, the imaging unit 14 reads all sheet reflection distances of the sheet 9 at the same time point (T1) from the storage unit 13, and generates a drop image of the sheet 9 based on the multiple sheet reflection distances in the X-axis and Y-axis directions. Furthermore, the imaging unit 14 can also record and integrate drop images of the sheet 9 at all time points from the conveyor track 82 of the production equipment to generate a three-dimensional drop image (not shown), which can be viewed and processed by production line personnel or technicians, thereby improving convenience and practicality.

[0045] In practice, the board drop detection system may also include an analysis unit (not shown) connected to a signal processor or storage device. The analysis unit can be used to record the number of board drop signals and record the number of board drops in the form of charts (such as pie charts or line graphs) for production line personnel or technicians to view and analyze later.

[0046] In this specific embodiment, the board drop detection system 1 includes a controller 15 connected to a signal processor 12 and a production device 8. The controller 15 is used to control the production device 8 to stop operating based on the board drop signal. In practice, the controller 15 can be a switch controller. When the signal processor 12 detects that the board 9 has fallen and generates a board drop signal, the signal processor 12 can transmit the board drop signal to the controller 15. Then, when the controller 15 receives the board drop signal transmitted by the signal processor 12, the controller 15 can control the production device 8 to stop operating, and can also control the conveyor track 82 to stop operating, so as to avoid continuous board drops, thereby reducing material costs and production time costs.

[0047] Furthermore, in this specific embodiment, the board drop detection system 1 includes an alarm 16 connected to a signal processor 12. The alarm 16 is used to generate an alarm message based on the board drop signal. In practice, the alarm 16 can be an alarm light, a buzzer, or other device with an alarm function. When the signal processor 12 detects that the board 9 has fallen and generates a board drop signal, the signal processor 12 can transmit the board drop signal to the alarm 16. Then, when the alarm 16 receives the board drop signal transmitted by the signal processor 12, the alarm 16 can issue a light, sound, or other reminder message, and production line personnel can know that the board 9 has fallen based on the warning message issued by the alarm 16, so as to carry out subsequent processing, thereby improving detection efficiency and reducing manual judgment costs.

[0048] In practice, controller 15 and alarm 16 can operate simultaneously. When controller 15 and alarm 16 receive a board drop signal from signal processor 12, controller 15 controls production equipment 8 to stop operating, and alarm 16 generates an alarm message. Since the automated production line contains multiple production devices, when controller 15 controls the production equipment to stop operating, production line personnel can quickly locate the production device where the board drop occurred through alarm 16 for subsequent processing, thereby improving efficiency and saving costs.

[0049] Furthermore, the board drop detection system of the present invention can also be applied to multiple production equipment in a manufacturing line. In practice, the board drop detection system may include multiple photodetectors to detect the drop of boards from each production equipment, and multiple signal processors connected to the multiple photodetectors to calculate and statistically analyze the board drop location, drop time, and number of drops. Further, the aforementioned storage unit, imaging unit, and analysis unit can be located in the central computer of the production line, and the storage unit can be connected to all signal processors. When multiple production equipment experiences board drop, the corresponding signal processors for those production equipment can transmit board drop data to the storage unit. The imaging unit can generate board drop images of multiple production equipment based on the board drop data in the storage unit, and the analysis unit can record and summarize the number of drops and drop ratios of all production equipment based on the board drop data in the storage unit, for viewing and subsequent analysis by production line personnel or technicians, thereby improving detection efficiency and practicality.

[0050] The detection light emitted by the transmitting unit of the photodetector of the present invention can be in the manner described in the aforementioned specific embodiments, or in other ways. Please refer to... Figure 6 . Figure 6 A schematic diagram of a photodetector and rotating mechanism 27 according to a specific embodiment of the present invention is shown. Figure 6As shown, the difference between this specific embodiment and the aforementioned specific embodiments lies in that the board drop detection system 2 in this specific embodiment further includes a rotating mechanism 27. The rotating mechanism 27 includes a base 271, a connecting member 272, a rotating member 273 with a hole 276, a fixing member 274, and a reflector 275. The connecting member 272 is disposed above the base 271, the rotating member 273 is horizontally rotatable above the connecting member 272, and the fixing member 274 connects to the reflector 275 and is disposed within the rotating member 273. An emitting unit 211 may be disposed within the connecting member 272. In practice, the emitting unit 211 can emit a vertically oriented linear laser beam, the reflector 275 can be disposed at a 45-degree angle within the rotating member 273, and the hole 276 can be disposed on the sidewall of the rotating member 273 and correspond to the reflector 275. Therefore, when the emitting unit 211 emits a linear laser beam, the laser beam can be reflected by the reflector 275 and pass through the hole 276 to irradiate the inner wall of the production equipment. Furthermore, the rotating member 273 can rotate rapidly back and forth so that the linear laser beam emitted by the emitting unit 211 forms a detection beam with a detection area. The rotation angle of the rotating member 273 can be determined according to the size of the conveyor track 82. When the plate 9 falls from the conveyor track 82, the rotating member 273 can drive the reflector 275 to rotate rapidly back and forth so that the linear laser beam emitted by the emitting unit 211 can sequentially irradiate the plate 9 through the reflector 275, thereby generating multiple plate reflections. The receiving unit 212 can be disposed on the side of the base 271 and on the same side as the hole 276 of the rotating member 273 to receive the plate reflections. Then, the signal processor calculates and generates multiple plate reflection distances between the plates 9 based on the multiple plate reflections. Furthermore, the imaging unit can also generate an image of the board material based on the order of the reflected light from the board material received by the receiving unit.

[0051] Please see Figure 7 . Figure 7 A schematic diagram of a board drop detection system 3 according to a specific embodiment of the present invention is shown. Figure 7As shown, the difference between this specific embodiment and the aforementioned specific embodiment lies in that the plate drop detection system 3 of this specific embodiment further includes a beam expander 38. The beam expander 38 is disposed between the emitting unit 311 and the side wall. The emitting unit 311 is used to emit linear laser light, and the linear laser light passes through the beam expander 38 to form detection light. In practice, the beam expander 38 can be disposed outside the production equipment and located between the emitting unit 311 and the housing. When the emitting unit 311 emits linear laser light to the beam expander 38, the beam expander 38 can change the diffusion angle of the linear laser light to form a fan-shaped detection light containing multiple linear laser lights, so as to detect whether the plate 9 has fallen from the conveyor track 82. It is worth noting that the shape of the detection light is not limited to the fan shape of the aforementioned specific embodiment. In practice, the beam expander 38 can also be designed with internal lenses so that the shape of the detection light can be, but is not limited to, rectangular.

[0052] In summary, the board drop detection system of the present invention can emit detection light covering the area of ​​the conveyor track through a photodetector, and detect changes in the reflection distance through a signal processor to comprehensively detect board drops, thereby improving detection efficiency and accuracy. Furthermore, the board drop detection system of the present invention can also calculate the position and distance of the board drop using a detection light with a detection area containing multiple laser beams and a signal processor, thereby improving detection efficiency. Moreover, the board drop detection system of the present invention can generate and integrate all time points of board drop and drop images through an imaging unit, allowing production line personnel or technicians to view and analyze them, thereby improving convenience and practicality. In addition, the board drop detection system of the present invention can also generate warning messages and control the production equipment to stop operation when a board drops, through an alarm and controller, to remind production line personnel and prevent continuous board drops, thereby improving efficiency and saving costs.

[0053] The detailed description of the preferred embodiments above is intended to more clearly illustrate the features and spirit of the present invention, and is not intended to limit the scope of the invention to the preferred embodiments disclosed above. Rather, the aim is to cover various modifications and equivalent arrangements within the scope of the patent claims made by this invention. Therefore, the scope of the patent claims made by this invention should be interpreted in the broadest possible sense based on the foregoing description, so as to cover all possible modifications and equivalent arrangements.

Claims

1. A plate drop detection system for a production equipment, for detecting the drop of a plate disposed on a production equipment, the production equipment having a side wall and including a conveyor rail for carrying the plate, the side wall being located on one side of the conveyor rail in the direction of movement, characterized in that... The board drop detection system includes: A light detector is disposed on the opposite side of the conveyor track relative to the sidewall, the light detector comprising: A transmitting unit is disposed below the conveying track and emits a detection light parallel to the conveying track toward the side wall. The detection light has a detection area that covers the area of ​​the conveying track. The transmitting unit and the side wall have a preset reflection distance. as well as A receiving unit is disposed below the transmitting unit and is installed at a distance from the transmitting unit. The receiving unit is used to receive a reflected light from the detection light, wherein the reflected light forms a reflection angle with the line connecting the receiving unit and the transmitting unit. as well as A signal processor, connected to the photodetector, is used to calculate a reflection distance of the detected light based on the installation distance and the reflection angle; When the reflection distance calculated by the signal processor is different from the preset reflection distance, the signal processor determines that the plate has fallen from the conveyor track and generates a plate drop signal.

2. The board drop detection system for production equipment as described in claim 1, characterized in that, It further includes a rotating mechanism, and the emitting unit is disposed on the rotating mechanism. The emitting unit is used to emit a straight laser beam. The rotating mechanism swings back and forth in a horizontal rotation manner so that the straight laser beam emitted by the emitting unit forms the detection light.

3. The board drop detection system for production equipment as described in claim 1, characterized in that, It further includes a beam expander disposed between the emitting unit and the sidewall. The emitting unit is used to emit a straight laser beam, and the straight laser beam passes through the beam expander to form the detection beam.

4. The board drop detection system for production equipment as described in claim 1, characterized in that, The emitting unit is a laser diode.

5. The board drop detection system for production equipment as described in claim 1, characterized in that, It further includes an alarm device connected to the signal processor, which generates an alarm message based on the board drop signal.

6. The board drop detection system for production equipment as described in claim 1, characterized in that, It further includes a controller connected to the signal processor and the production equipment, the controller being used to control the production equipment to stop operating based on the board drop signal.

7. The board drop detection system for production equipment as described in claim 1, characterized in that, It further includes a storage unit connected to the signal processor. When the signal processor determines that the plate has fallen from the conveyor track, the signal processor generates a drop time corresponding to the drop signal and stores the drop signal and the drop time in the storage unit.

8. The board drop detection system for production equipment as described in claim 7, characterized in that, The detection light includes multiple linear laser beams. The receiving unit receives multiple reflected beams from the material when the linear laser beams illuminate the material. Multiple material reflection angles are formed between the reflected beams and the line connecting the receiving unit and the transmitting unit. The signal processor generates multiple material reflection distances corresponding to the reflected beams based on the installation distance and the material reflection angles, and stores the material reflection distances in the storage unit.

9. The board drop detection system for production equipment as described in claim 8, characterized in that, The device further includes an imaging unit connected to the storage unit, which generates a drop image corresponding to the plate based on the drop time and the reflection distance of the plates.

10. The board drop detection system for production equipment as described in claim 1, characterized in that, The conveying track includes a first conveying track and a second conveying track, and the first conveying track and the second conveying track are arranged parallel to each other.

Images