CN116265987A - Plate falling detection system for production equipment - Google Patents

Plate falling detection system for production equipment Download PDF

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Publication number
CN116265987A
CN116265987A CN202210154755.1A CN202210154755A CN116265987A CN 116265987 A CN116265987 A CN 116265987A CN 202210154755 A CN202210154755 A CN 202210154755A CN 116265987 A CN116265987 A CN 116265987A
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China
Prior art keywords
plate
unit
light
signal processor
reflection
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CN202210154755.1A
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Chinese (zh)
Inventor
杨竣翔
谢明峻
吕翊菁
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Adlink Technology Inc
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Adlink Technology Inc
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

A falling plate detection system for production equipment can detect falling of a plate arranged on the production equipment and comprises a light detector and a signal processor, wherein the production equipment comprises a conveying track and is provided with a side wall, the light detector comprises a transmitting unit which is arranged below the conveying track and is used for transmitting detection light parallel to the conveying track towards the side wall, a receiving unit which is used for receiving reflection light of the detection light and has a mounting distance with the transmitting unit, a preset reflection distance is arranged between the transmitting unit and the side wall, a reflection angle is formed between the reflection light and the online of the receiving unit and the transmitting unit, the signal processor calculates the reflection distance of the detection light according to the mounting distance and the reflection angle, and when the reflection distance is different from the default reflection distance, the signal processor judges that the plate falls from the conveying track and generates a falling plate signal; therefore, the invention effectively detects the falling of the plate arranged on the production equipment, improves the efficiency, reduces the cost and avoids damage.

Description

Plate falling detection system for production equipment
Technical Field
The present invention relates to a detecting system, and more particularly to a board drop detecting system for a manufacturing apparatus in circuit board manufacturing.
Background
With the rapid development of industry, many electronic manufacturing enterprises have gradually moved to equipment automation. The production of Printed Circuit Boards (PCBs) involves the fabrication process of surface mount technology (Surface Mount Technology, SMT) and dual inline package part mounting (Dual In Line Package Process, DIP) to solder electronic components/parts onto the PCB.
Generally, a manufacturing line for SMT and DIP includes a plurality of manufacturing apparatuses connected in series via a rail or a conveyor. Further, the printed circuit boards are arranged on a rail or a conveyor belt and sequentially enter each production device for processing, so that an automatic production line of the assembly line is formed. However, during the movement of the printed circuit board, the rail or the conveyor belt may shake due to vibration generated during the operation of the production equipment, so that the printed circuit board is displaced or offset, and even the printed circuit board falls off the rail or the conveyor belt. Moreover, since some production equipment may not include a transparent observation area, the production line personnel cannot see the internal conditions of the production equipment in real time, and thus, when the printed circuit board falls or even continuously falls into the production equipment, the production line personnel cannot immediately check the conditions, thereby reducing the efficiency and increasing the material cost. Further, if the printed circuit board is continuously dropped, damage to parts inside the production apparatus may be caused.
Therefore, there is a need to develop a detecting mechanism for detecting the falling of the board to solve the problems in the prior art.
Disclosure of Invention
Accordingly, the present invention is directed to a falling board detecting system for a production device, which can solve the problems of the prior art, effectively detect the falling of a board disposed on the production device, improve the efficiency, reduce the cost, and avoid damage.
In order to achieve the above object, the present invention discloses a falling plate detecting system for a production apparatus for detecting falling of a plate material disposed on a production apparatus, the production apparatus having a sidewall and comprising a conveying rail for carrying the plate material, and the sidewall being located at one side of a moving direction of the conveying rail, the falling plate detecting system comprising:
a light detector disposed on the other side of the conveying track opposite to the side wall, the light detector comprising:
a transmitting unit, which is arranged below the conveying track and is used for transmitting a detection light parallel to the conveying track towards the side wall, wherein the detection light has a detection area, the detection area covers the area of the conveying track, and a preset reflection distance is arranged between the transmitting unit and the side wall; and
the receiving unit is arranged below the transmitting unit and has a mounting distance with the transmitting unit, and is used for receiving reflected light of the detection light, wherein a reflecting angle is formed between the reflected light and the connection of the receiving unit and the transmitting unit; and
a signal processor connected to the light detector for calculating a reflection distance of the detection light according to 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 judges that the plate falls off the conveying track and generates a plate falling signal.
The laser detection device further comprises a rotating mechanism, the transmitting unit is arranged on the rotating mechanism and is used for transmitting a linear laser light, and the rotating mechanism swings back and forth in a horizontal rotating mode so that the linear laser light transmitted by the transmitting unit forms the detection light.
The laser beam expander is arranged between the emitting unit and the side wall, and the emitting unit is used for emitting a linear laser beam which passes through the beam expander to form the detection light.
Wherein, the emitting unit is a laser diode.
Wherein, it further comprises an alarm connected with the signal processor, the alarm is used for generating an alarm message according to the board-falling signal.
Wherein, it further includes a controller, it connects the signal processor and the production equipment, the controller is used for controlling the production equipment to stop operating according to the board falling signal.
The signal processor generates a board falling time corresponding to the board falling signal when the signal processor judges that the board falls from the conveying track, and stores the board falling signal and the board falling time into the storage unit.
The signal processor generates a plurality of plate reflection distances corresponding to the plate reflection lights according to the installation distance and the plate reflection angles respectively, and stores the plate reflection distances to the storage unit.
The imaging unit is connected with the storage unit and generates a plate falling image corresponding to the plate according to the plate falling time and the plate reflection distances.
The conveying track comprises a first conveying track and a second conveying track, and the first conveying track and the second conveying track are arranged in parallel.
In summary, the falling plate detection system for production equipment of the present invention can emit detection light covering the area of the conveying track through the photodetector, and detect the change of the reflection distance through the signal processor, so as to detect the falling plate in all aspects, thereby improving the detection efficiency and accuracy. In addition, the plate falling detection system can also calculate the falling position and distance of the plate through the detection light which has the detection area and comprises a plurality of laser lights and the signal processor so as to improve the detection efficiency. In addition, the falling board detection system can generate and integrate all time points of falling boards and falling board images through the imaging unit so as to be checked and subsequently analyzed by production line personnel or technicians, thereby improving convenience and practicability. In addition, the plate falling detection system can also generate warning information and control production equipment to stop operating through the warning device and the controller when the plate is fallen, so as to remind production line personnel and prevent continuous plate falling, thereby improving efficiency and saving cost.
Drawings
FIG. 1 is a functional block diagram of a drop out detection system for a manufacturing facility according to one embodiment of the present invention.
FIG. 2A is a schematic diagram of a light detector, a production apparatus and a sheet material for a drop plate detection system of the production apparatus according to an embodiment of the present invention.
FIG. 2B is a schematic view of the photodetector, sidewall and plate of FIG. 2A at a viewing angle.
FIG. 2C is a schematic diagram of the photodetector, sidewall and plate of FIG. 2A at another viewing angle.
Fig. 3 shows a schematic view of a sheet falling from a conveyor track according to an embodiment of the invention.
Fig. 4 shows the schematic diagram of fig. 3 at another viewing angle.
Fig. 5 shows a schematic view of a drop image of a sheet according to an embodiment of the invention.
FIG. 6 shows a schematic diagram of a photodetector and a rotation mechanism according to an embodiment of the invention.
Fig. 7 is a schematic diagram of a board drop detection system according to an embodiment of the invention.
Detailed Description
In order that the advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It should be noted that these embodiments are merely representative embodiments of the present invention, and the specific methods, devices, conditions, materials, etc. are not meant to limit the present invention or the corresponding embodiments. The devices are shown for expressing relative positions and are not drawn to actual scale.
In the description of the present specification, reference to the terms "one embodiment," "another embodiment," or "portions of the embodiment," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments.
Please refer to fig. 1, fig. 2A, fig. 2B and fig. 2C together. Fig. 1 is a functional block diagram of a drop board detection system 1 according to an embodiment of the invention. Fig. 2A shows a schematic view of the photodetector 11, the production equipment 8 and the sheet material 9 of the drop plate detection system 1 according to an embodiment of the invention. FIG. 2B shows the photodetector 11, sidewall 81 and sheet 9 of FIG. 2A at a viewing angle. FIG. 2C shows the photodetector 11, sidewall 81, and sheet 9 of FIG. 2A at another viewing angle.
The falling board detecting system 1 of the present invention is used for detecting falling of a board material 9 placed on a production facility 8. As shown in fig. 2A to 2C, the production apparatus 8 has a side wall 81 and includes a conveying rail 82. The conveying rail 82 is used to attach the circuit board 9, and the side wall 81 is located at one side of the moving direction of the conveying rail 82. In practice, the production facility 8 may include a housing 80, and the housing 80 has an inlet and an outlet opposite and in communication with each other. The conveyor rail 82 may extend through the inlet and outlet and straddle the housing 80. The conveying rail 82 may be a conveying belt and may be movable in a direction from the inlet to the outlet, i.e., in a direction of +x axis (as indicated by an arrow in the drawing), and the side wall 81 may be an inner wall of the casing 80 at the outlet. The conveyor track 82 can thus carry and bring the sheet material 9 to the production facility 8 for processing. Further, the conveying track 82 may include a first conveying track 821 and a second conveying track 822, and the first conveying track 821 and the second conveying track 822 are disposed parallel to each other. In practice, the distance between the first and second conveyor rails 821, 822 may correspond to the size of the sheet material 9 such that the sheet material 9 may ride on the first and second conveyor rails 821, 822. When the production facility 8 is a welding facility, the double-track conveyable rails 82 avoid obscuring the surface of the excess sheet material 9 to facilitate welding of the sheet material 9.
As shown in fig. 1 and fig. 2A to 2C, in the present embodiment, the falling plate detection system 1 of the present invention includes a light detector 11 disposed on the other side of the conveying track 82 opposite to the side wall 81 and includes a transmitting unit 111 and a receiving unit 112. The emitting unit 111 is disposed below the conveying rail 82 and emits detection light (indicated by a dotted line in the figure) parallel to the conveying rail 82 toward the side wall 81. The receiving unit 112 is disposed below the emitting unit 111 and is configured to receive the reflected light of the detection light. In practice, the light detector 11 may be a laser sensor, and the light detector 11 may be disposed outside the housing 80 and at the entrance. Further, the transmitting unit 111 may be disposed in parallel below the conveying track 82, and the receiving unit 112 may be disposed in parallel below the transmitting unit 111, i.e., the transmitting unit 111 is located between the conveying track 82 and the receiving unit 112. The emitting unit 111 may emit detection light to the side wall 81 at the outlet through the inlet, that is, the detection light emitted by the emitting unit 111 may detect a position below the conveying rail 82 inside the production apparatus 8. The receiving unit 112 may also receive the reflected light of the detection light through the entrance.
In practice, the transmitting unit 111 and the receiving unit 112 of the detector 11 are not limited to transmitting detection light through the entrance and receiving reflected light of the detection light. The housing 80 may further include a detection hole (not shown) below the inlet. The emitting unit 111 may emit detection light to the sidewall 81 at the outlet through the detection hole, and the receiving unit 112 may receive reflected light of the detection light through the detection hole.
In this embodiment, the detection light emitted by the emitting unit 111 has a detection area, and the detection area covers the area of the conveying track 82. In practice, the emitting unit 111 of the photodetector 11 emits a light field having a fan shape and a detection area to detect the lower position of the conveyor rail 82 inside the production apparatus 8 (as shown in fig. 2B). The area of the conveying rail 82 may be a rectangular area surrounded by the first conveying rail 821 and the second conveying rail 822. The emitting unit 111 can adjust the detection area of the detection light through a structure or an angle design, so that the detection area of the detection light is larger than and covers the area of the conveying track 82. Therefore, no matter when the sheet material 9 on the conveying rail 82 falls from the outside of the first conveying rail 821, the outside of the second conveying rail 822, or the gap between the first conveying rail 821 and the second conveying rail 822, the sheet material 9 passes through the detection light emitted by the emitting unit 111.
In this embodiment, there is a mounting distance Di between the transmitting unit 111 and the receiving unit 112. In practice, the installation distance Di may be determined according to the model or specification of the photodetector 11, or may be designed according to the size of the apparatus or installation space. When the emitting unit 111 emits the detection light to the sidewall 81, the sidewall 81 reflects the detection light to form a reflected light. Since the light has a scattering property, the reflected light reflected by the sidewall 81 is scattered from various directions. Further, since the receiving unit 112 is located below the transmitting unit 111 and has a mounting distance Di, the reflected light received by the receiving unit 112 is not parallel to the detected light emitted by the transmitting unit 111, and a reflection angle a is formed between the reflected light and the connection between the receiving unit 112 and the transmitting unit 111 0 。
In the present embodiment, the signal processor 12 is connected to the photodetector 11 and calculates the reflection distance of the detected light according to the installation distance Di and the reflection angle. Further, the emission unit 111 has a predetermined reflection distance D from the sidewall 81 0 . In practice, the signal processor 12 may be a signal processing chip with an operation function, and may communicate with the photodetector 11 by a wired connection or a wireless connection. The signal processor 12 calculates the reflection distance of the detection light by triangulation. When the emitting unit 111 emits the detection light to the sidewall 81 and the receiving unit 112 receives the reflection angle A formed between the reflected light reflected by the sidewall 81 and the connection between the receiving unit 112 and the emitting unit 111 0 After that, the signal processor 12 can determine the installation distance Di and the reflection angle A 0 Generating a reflection distance between the emitting unit 111 and the sidewall 81, namely a preset reflection distance D 0 . In practice, the transmitting unit 111 may continuously transmit the detection light and the receiving unit 112 may continuously receive the reflected light of the detection light, so the signal processor 12 may continuously calculate the reflection distance. That is, the reflection distances calculated by the signal processor 12 are the predetermined reflection distance D under the normal production conditions of the production equipment 8 and the plate 9 0 。
Please refer to fig. 3. Fig. 3 shows a schematic view of a sheet 9 falling off of the conveying track 82 according to an embodiment of the invention. In practice, when the sheet material 9 falls from the conveying rail 82 inside the production apparatus 8 due to vibration or other factors during processing, the sheet material 9 contacts and passes the detection light emitted by the emitting unit 111. Further, when the plate 9 contacts the detection light, the plate 9 blocks part of the detection light so that the detection light can only be irradiated to the plate 9 but cannot be irradiated to the side wall 81. At this time, the plate 9 reflects the detection light to form a reflected light of the plate 9, and a reflection angle a is formed between the reflected light of the plate 9 and the connection between the receiving unit 112 and the transmitting unit 111, and the signal processor 12 calculates and generates a reflection distance D between the transmitting unit 111 and the plate 9 according to the installation distance Di and the reflection angle a. Since the plate 9 is dropped from the conveying rail 82 inside the production equipment 8, the angle of the reflected light of the side wall 81 received by the receiving unit 112 is different from the angle of the reflected light of the plate 9, so that the reflection distance D calculated by the signal processor 12 is different from the preset reflection distance D 0 Different. At this time, the signal processor 12 can detect and determine that the board 9 falls from the conveying rail 82 and generate a board falling signal. Therefore, the falling plate detection system can emit detection light covering the area of the conveying track through the light detector, and detect the change of the reflection distance through the signal processor so as to detect the falling plate in a full aspect, thereby improving the detection efficiency and the detection accuracy.
Further, in practice, when the reflection distance D calculated by the signal processor 12 is equal to the preset reflection distance D 0 Different and generating board-falling signalsMeanwhile, the signal processor 12 can also generate and record the board-off time corresponding to the board-off signal.
Please refer to fig. 3 and fig. 4. Fig. 4 shows the schematic diagram of fig. 3 at another viewing angle. As shown in fig. 4, in the present embodiment, the detection light emitted by the emitting unit 111 includes a plurality of linear laser lights. The receiving unit 112 reflects the plurality of linear laser beams, and a plurality of reflection angles are formed between the reflection beams of the plurality of linear laser beams and the connection lines of the receiving unit 112 and the transmitting unit 111. The signal processor 12 generates a plurality of reflection distances according to the installation distance and the plurality of reflection angles. In practice, the emitting unit 111 may be a laser diode, and the laser diode may include a plurality of laser dies respectively emitting a plurality of linear laser lights with different horizontal emission angles to form the detection light with the detection area. As shown in fig. 3 and 4, when the plate 9 falls from the conveying rail 82, the plate 9 blocks a plurality of linear laser lights. When the board 9 reflects the linear laser light with a horizontal emission angle, and the board reflection angle is formed between the board reflection light of the linear laser light and the connection of the receiving unit 112 and the emitting unit 111, the signal processor 12 can calculate and generate the board reflection distance between the emitting unit 111 and the board 9 according to the installation distance Di and the board reflection angle. Further, the signal processor 12 can calculate and generate the plate reflection distances of the plate 9 in the X-axis direction and the Y-axis direction according to the plate reflection distance and the horizontal emission angle. Similarly, when the plate 9 blocks and reflects the plurality of linear laser beams with different horizontal emission angles, the signal processor 12 can calculate the reflection distances of the plate 9 corresponding to the X-axis direction and the Y-axis direction of each linear laser beam. Note that the number of the multiple broken lines in fig. 4 is merely illustrative of multiple linear laser lights, and in practice, the number of the linear laser lights is greater than the number of the broken lines in fig. 4. Therefore, the plate falling detection system can calculate the falling position and distance of the plate through the detection light which has the detection area and comprises a plurality of laser lights and the signal processor, so as to improve the detection efficiency.
Please refer to fig. 1, fig. 4 and fig. 5. Fig. 5 shows a schematic view of a drop image of a sheet 9 according to an embodiment of the invention. As shown in fig. 1, in the present embodiment, the board drop detection system 1 includes a storage unit 13 connected to a signal processor 12. In practice, the storage unit 13 may be a register, a cache, a random access memory, a hard disk, a tape drive, an optical drive, etc., and the signal processor 12 may store the board-down signal, the board-down time, the calculated reflection distance, and the calculated reflection distances of the plurality of boards in the storage unit 13.
Further, in the present embodiment, the board detection system 1 includes an imaging unit 14 connected to the storage unit 13. The imaging unit 14 is used for generating a plate dropping image corresponding to the plate 9 according to the plate dropping time and the plate reflection distances. In practice, as shown in fig. 4 and 5, after the board 9 falls from the conveying track 82, the signal processor 12 calculates board reflection distances of the plurality of corresponding board reflection lights in the X-axis direction and the Y-axis direction according to the plurality of board reflection lights, and stores the board reflection distances of the plurality of corresponding board reflection lights in the X-axis direction and the Y-axis direction and the board falling time to the storage unit 13. Then, the imaging unit 14 can read all the reflection distances of the plate 9 at the same time point (T1) from the storage unit 13, and can generate a plate falling image of the plate 9 according to the reflection distances of the plate in the X-axis direction and the reflection distances of the plate in the Y-axis direction. In addition, the imaging unit 14 can record and integrate the falling images of the plate 9 at all the falling time points from the conveying track 82 of the production equipment to generate three-dimensional falling images (not shown) for the production line personnel or technicians to view and perform subsequent processing, thereby improving convenience and practicability.
In addition, in practice, the board-dropping detection system may further include an analysis unit (not shown) connected to the signal processor or the storage device. The analysis unit can be used for recording the times of plate falling signals and recording the times of plate falling of the plate in a chart (such as a pie chart and a graph) mode for checking and subsequent analysis by production line personnel or technicians.
In this embodiment, the board drop detection system 1 includes a controller 15 connected to the signal processor 12 and the production equipment 8. The controller 15 is used for controlling the production equipment 8 to stop operating according to the board falling signal. In practice, the controller 15 may be a switch controller. When the signal processor 12 detects that the board 9 is dropped to generate 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-dropping signal sent by the signal processor 12, the controller 15 can control the production equipment 8 to stop operating, and can also control the conveying rail 82 to stop operating, so as to avoid the continuous board dropping, and further reduce the material cost and the production time cost.
Further, in the present embodiment, the board drop detection system 1 includes an alarm 16 connected to the signal processor 12. The alarm 16 is used for generating an alarm message according to the board-falling signal. In practice, the alarm 16 may be a warning light, a buzzer or other devices with a warning function. When the signal processor 12 detects that the board 9 is dropped to generate 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 falling signal transmitted by the signal processor 12, the alarm 16 can emit a reminding message such as light and sound, and the production line personnel can know that the board 9 falls according to the reminding message emitted by the alarm 16 so as to perform subsequent processing, thereby improving the detection efficiency and reducing the labor judgment cost.
In practice, the controller 15 and the alarm 16 may also operate simultaneously. When the controller 15 and the alarm 16 receive the board-falling signal from the signal processor 12, the controller 15 controls the production equipment 8 to stop operating, and the alarm 16 generates an alarm message. Because the automated production line includes a plurality of production devices, when the controller 15 controls the production devices to stop operating, the production line personnel can quickly find the production devices with the falling plates through the alarm 16 for subsequent processing, thereby improving the efficiency and saving the cost.
In addition, the falling board detection system can be applied to a plurality of production devices of a manufacturing production line. In practice, the plate falling detection system may include a plurality of light detectors for detecting the falling of the plate of each production apparatus, and a plurality of signal processors connected to the light detectors for calculating and counting the plate falling position, the plate falling time, the plate falling times, and the like. Furthermore, the storage unit, the imaging unit and the analysis unit can be arranged in a central computer of the production line, and the storage unit can be connected with all the signal processors. When a plurality of production devices are in a plate falling state, the signal processors corresponding to the production devices can transmit plate falling data to the storage unit. The imaging unit can respectively generate plate falling images of plates of a plurality of production devices according to plate falling data in the storage unit, and the analysis unit can also record and integrate plate falling times, plate falling proportion and the like of all the production devices according to the plate falling data in the storage unit so as to be checked and subsequently analyzed by production line personnel or technicians, thereby improving detection efficiency and practicability.
The manner of detecting light emitted by the emitting unit of the photodetector of the present invention may be other than the foregoing embodiments. Please refer to fig. 6. Fig. 6 shows a schematic diagram of a photodetector and rotation mechanism 27 according to an embodiment of the invention. As shown in fig. 6, the present embodiment is different from the foregoing embodiment in that the falling plate detection system 2 of the present embodiment further includes a rotation mechanism 27. The rotation mechanism 27 includes a base 271, a connection member 272, a rotation member 273 having a hole 276, a fixing piece 274, and a mirror 275, wherein the connection member 272 is disposed above the base 271, the rotation member 273 is horizontally rotatably disposed above the connection member 272, and the fixing piece 274 is connected to the mirror 275 and disposed in the rotation member 273. The transmitting unit 211 may be disposed in the connection member 272. In practice, the emitting unit 211 may emit the linear laser light in the vertical direction, the mirror 275 may be disposed in the rotating member 273 at 45 degrees, and the hole 276 may be disposed on the sidewall of the rotating member 273 and correspond to the mirror 275. Thus, when the emission unit 211 emits the linear laser light, the linear laser light may be reflected by the reflecting mirror 275 and pass through the hole 276 to be irradiated toward the inner wall of the production apparatus. Further, the rotating member 273 can be rotated back and forth rapidly, so that the linear laser light emitted by the emitting unit 211 forms the detection light with a detection area. And the rotation angle of the rotation member 273 may be determined according to the size of the conveying rail 82. When the plate 9 falls from the conveying track 82, the rotation member 273 can drive the mirror 275 to rotate back and forth rapidly, so that the linear laser light emitted by the emission unit 211 can sequentially irradiate onto the plate 9 through the mirror 275, and a plurality of plate reflection lights are generated. And the receiving unit 212 may be disposed at a side of the base 271 and at the same side as the hole 276 of the rotating member 273 to receive the plate reflected light. Then, the signal processor calculates and generates a plurality of plate reflection distances between the plates 9 according to the plurality of plate reflection lights. Further, the imaging unit can also generate plate images according to the sequence of the reflected light of the plates received by the receiving unit.
Please refer to fig. 7. Fig. 7 is a schematic diagram of a board drop detection system 3 according to an embodiment of the invention. As shown in fig. 7, the present embodiment is different from the foregoing embodiment in that the falling plate detection system 3 of the present embodiment further includes a beam expander 38. The beam expander 38 is disposed between the emitting unit 311 and the sidewall. The emitting unit 311 emits linear laser light, and the linear laser light passes through the beam expander 38 to form detection light. In practice, the beam expander 38 may be disposed outside the production apparatus and between the emission unit 311 and the housing. When the emission unit 311 emits the 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 shape and include detection light of a plurality of linear laser lights, so as to detect whether the plate 9 falls from the conveying track 82. It should be noted that the shape of the detection light is not limited to the fan shape of the foregoing embodiment, and in practice, the beam expander 38 may also be designed by an internal lens, so that the shape of the detection light may be, but is not limited to, a rectangle.
In summary, the drop plate detection system of the present invention can emit detection light covering the area of the conveying track through the photodetector, and detect the change of the reflection distance through the signal processor, so as to detect the drop of the plate in all aspects, thereby improving the detection efficiency and accuracy. In addition, the plate falling detection system can also calculate the falling position and distance of the plate through the detection light which has the detection area and comprises a plurality of laser lights and the signal processor so as to improve the detection efficiency. In addition, the falling board detection system can generate and integrate all time points of falling boards and falling board images through the imaging unit so as to be checked and subsequently analyzed by production line personnel or technicians, thereby improving convenience and practicability. In addition, the plate falling detection system can also generate warning information and control production equipment to stop operating through the warning device and the controller when the plate is fallen, so as to remind production line personnel and prevent continuous plate falling, thereby improving efficiency and saving cost.
From the foregoing detailed description of the preferred embodiments, it is intended to more clearly describe the nature and spirit of the invention, but not to limit the scope of the invention by the above disclosed preferred embodiments. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims. The scope of the claimed invention should therefore be accorded the broadest interpretation based upon the foregoing description so as to encompass all such modifications and equivalent arrangements.

Claims (10)

1. A drop detection system for a production facility for detecting dropping of a sheet material disposed on the production facility, the production facility having a side wall and comprising a conveyor track for carrying the sheet material, and the side wall being located on one side of a direction of movement of the conveyor track, the drop detection system comprising:
a light detector disposed on the other side of the conveying track opposite to the side wall, the light detector comprising:
a transmitting unit, which is arranged below the conveying track and is used for transmitting a detection light parallel to the conveying track towards the side wall, wherein the detection light has a detection area, the detection area covers the area of the conveying track, and a preset reflection distance is arranged between the transmitting unit and the side wall; and
the receiving unit is arranged below the transmitting unit and has a mounting distance with the transmitting unit, and is used for receiving reflected light of the detection light, wherein a reflecting angle is formed between the reflected light and the connection of the receiving unit and the transmitting unit; and
a signal processor connected to the light detector for calculating a reflection distance of the detection light according to 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 judges that the plate falls off the conveying track and generates a plate falling signal.
2. The system of claim 1, further comprising a rotation mechanism, wherein the emission unit is disposed on the rotation mechanism, the emission unit is configured to emit a linear laser beam, and the rotation mechanism swings back and forth in a horizontal rotation manner, so that the linear laser beam emitted by the emission unit forms the detection beam.
3. The drop detection system of claim 1, further comprising a beam expander disposed between the emission unit and the sidewall, wherein the emission unit is configured to emit a linear laser beam, and the linear laser beam passes through the beam expander to form the detection beam.
4. The drop detection system of claim 1, wherein the emitting unit is a laser diode.
5. The drop detection system of claim 1, further comprising an alarm coupled to the signal processor, the alarm configured to generate an alarm message based on the drop signal.
6. The system of claim 1, further comprising a controller coupled to the signal processor and the production equipment, the controller configured to control the production equipment to stop according to the drop signal.
7. The system of claim 1, further comprising a storage unit connected to the signal processor, wherein when the signal processor determines that the board is dropped 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 system of claim 7, wherein the detecting light comprises a plurality of linear laser lights, the receiving unit is configured to receive a plurality of reflected light of the plate irradiated by the linear laser lights, a plurality of reflected angles of the plate are formed between the reflected light of the plate and the connection between the receiving unit and the transmitting unit, and the signal processor generates a plurality of reflected distances of the plate corresponding to the reflected light of the plate according to the installation distance and the reflected angles of the plate, respectively, and stores the reflected distances of the plate to the storage unit.
9. The system of claim 8, further comprising an imaging unit coupled to the storage unit, the imaging unit generating a drop image corresponding to the panel according to the drop time and the reflection distances of the panels.
10. The drop detection system of claim 1, wherein the conveyor comprises a first conveyor and a second conveyor, and the first conveyor and the second conveyor are disposed parallel to each other.
CN202210154755.1A 2021-12-16 2022-02-21 Plate falling detection system for production equipment Pending CN116265987A (en)

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TW110147183 2021-12-16

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JP4043158B2 (en) * 1999-09-30 2008-02-06 松下電器産業株式会社 Reflow soldering equipment
KR20050019445A (en) * 2003-08-19 2005-03-03 삼성전자주식회사 Mapping apparatus and control method thereof
TW201000882A (en) * 2008-06-24 2010-01-01 Toes Opto Mechatronics Co Cartridge panel mapping system and method of inspecting panel
US8318512B2 (en) * 2009-04-29 2012-11-27 Applied Materials, Inc. Automated substrate handling and film quality inspection in solar cell processing
US11262454B2 (en) * 2017-03-02 2022-03-01 DSCG Solutions, Inc. Dwell-angle-independent tracking and monitoring objects using LIDAR

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