Detection device and detection method

Abstract

The invention relates to a detection device and a detection method, and belongs to the technical field of circuit board quality detection.The detection device comprises a bottom plate, a bearing plate and a light transmission detector, and the bottom plate is provided with a weighing device and an electrostatic eliminator; the bearing plate is parallel to the bottom plate, and the bearing plate is connected with the bottom plate through the weighing device; the static electricity eliminator is annularly arranged on the side face of the bearing plate, and the ion output end of the static electricity eliminator is located on the datum plane of the bearing plate; and the light transmittance detector is positioned on the reference surface of the bearing plate, is positioned on one side of the bearing plate, and is used for detecting the light transmittance of the sheet. According to the scheme provided by the invention, the first adhesion entrainment judgment is carried out on the sucked sheet through the weighing sensor, and the second adhesion entrainment judgment is carried out on the sucked sheet through the light transmission detector, so that the adhesion entrainment detection accuracy is improved, and the problems of wrong detection and missing detection are solved.

Description

Technical Field

[0001] The present application relates to the technical field of circuit board quality detection, and in particular to a detection device and a detection method. Background Art

[0002] PCB, also known as printed circuit board, is the support of electronic components and the carrier for the electrical connection of electronic components. In the production process of circuit boards, core boards, PP, copper foil and other materials are stacked together and pressed. Generally, such materials are usually stored in the form of multiple sheets stacked into a book. When in use, the top layer of the material is sucked up by a vacuum suction cup group for separation and then transferred to the stacking station. However, in the actual production process, because the material is very thin, it is very easy to be affected by factors such as static electricity or negative pressure to cause adhesion and entrainment of multiple sheets, causing product quality problems.

[0003] In the prior art, in order to avoid product quality problems caused by adhesion and entrainment of multiple sheets when sucking materials, a common detection method is to use an ultrasonic single-sheet or double-sheet sensor. However, the ultrasonic single-sheet or double-sheet sensor can only detect one point, but adhesion may occur at any position. In this case, even if the number of sensors is increased, there is still leakage. For materials that are too thin and tightly attached, the ultrasonic single-sheet or double-sheet sensor cannot accurately measure. Based on this, the inventor of the present application provides a more stable and reliable detection method.

[0004] This section merely provides background information related to the present application and is not necessarily prior art. Summary of the invention

[0005] In order to overcome the problems existing in the related art, the present application provides a detection device, which performs a first adhesion and entrainment judgment on the sucked sheet through a weighing sensor, and performs a second adhesion and entrainment judgment on the sucked sheet through a light-transmitting detector, thereby improving the detection accuracy of adhesion and entrainment and solving the problems of false detection and missed detection.

[0006] A detection device provided in a first aspect of the present application comprises a bottom plate, a carrying plate and a light transmission detector, a weighing device and an electrostatic eliminator are arranged on the bottom plate, the carrying plate is parallel to the bottom plate, and the carrying plate is connected to the bottom plate through the weighing device;

[0007] The static eliminator is arranged in a ring on the side of the supporting plate, and the ion output end of the static eliminator is located above the reference surface of the supporting plate;

[0008] The light transmission detector is located on the reference surface of the carrying plate and on one side of the carrying plate. The light transmission detector includes a light transmission detection unit and a transmission member. The light transmission detection unit has a detection slot.

[0009] After the sheet is sucked up by the vacuum suction cup assembly, the transmission member drives the light transmission detection unit to approach the sheet so that part of the sheet is located in the detection groove.

[0010] In one embodiment, it further comprises a plurality of auxiliary separators, wherein the plurality of auxiliary separators are arranged on the outer side of the carrying plate;

[0011] The auxiliary separator includes a driving member and a clamping member, the driving member is connected to the bottom plate through a bracket, and the clamping surface of the clamping member is located on the reference surface of the bearing plate and is perpendicular to the reference surface of the bearing plate;

[0012] Wherein, the driving member is used to drive the clamping member to move closer to or away from the side of the sheet.

[0013] In one embodiment, a friction structure is further provided on the clamping surface, and the friction structure includes at least one of a protrusion, a serrated groove and a friction gasket.

[0014] In one embodiment, the weighing device includes at least three weighing sensors, which are equidistantly distributed on the bottom plate. The at least three weighing sensors enclose a weighing surface, and the center line of the weighing surface coincides with the center of gravity of the sheet.

[0015] In one embodiment, a limiting protrusion is provided on the weighing sensor, and a groove corresponding to the limiting protrusion is provided on the carrying plate.

[0016] In one embodiment, the light transmission detection unit includes a U-shaped plate, a fiber optic transmitter and a fiber optic receiver. The U-shaped plate is connected to a transmission member. The U-shaped plate has a first inner wall surface and a second inner wall surface that are parallel. The fiber optic transmitter is arranged on the first inner wall surface, and the fiber optic receiver is arranged on the second inner wall surface. The fiber optic transmitter and the fiber optic receiver are arranged opposite to each other.

[0017] In one embodiment, the transmission member includes a cylinder, which is mounted on the machine platform of the pressing machine through a bracket, and a piston rod of the cylinder is connected to the U-shaped plate.

[0018] In one embodiment, a plurality of photoelectric sensors are further included, which are respectively arranged at the four corners of the bottom plate to monitor whether the sheet falls after being sucked by the vacuum suction cup group.

[0019] The second aspect of the present application is to provide a detection method, the detection method of the detection device comprises: obtaining preset parameters of a single sheet, the preset parameters comprising a preset range of average weight and a preset range of average light transmittance;

[0020] Eliminating static electricity of the sheet material using the static eliminator of the detection device;

[0021] Using a vacuum suction cup group to suck the sheet on the carrier plate;

[0022] If the weight of the sheet sucked up by the vacuum suction cup group is greater than the preset range of the average weight, the transmittance detector of the detection device is used to detect the transmittance of the currently sucked sheet. If the transmittance detection result shows that the transmittance is less than the preset range of the average transmittance, the laminating machine is used to issue an alarm reminder.

[0023] In the above detection method, before the vacuum suction cup group is used to suck the sheet on the carrier plate, the method further comprises: using an auxiliary separator of the detection device to clamp the sheet on the carrier plate;

[0024] While the vacuum suction cup group is used to suck the sheet material on the carrier plate, the method further comprises: using a photoelectric sensor of a detection device to detect whether the sheet material sucked by the vacuum suction cup group falls off, and if so, using a laminating machine to send an alarm reminder.

[0025] The technical solution provided by this application may have the following beneficial effects:

[0026] The detection device provided in the present application includes a base plate, a carrier plate and a light transmittance detector, wherein the carrier plate is placed on the base plate through a weighing device, and the stacked sheets are placed on the carrier plate. After starting the laminating machine, the operator inputs the standard range of the average weight of a single sheet and the standard range of the average light transmittance into the laminating machine, the laminating machine reads the weight data of the weighing device, the static eliminator performs static electricity elimination on the sheet on the carrier plate, and then the vacuum suction cup group descends to vacuum absorb the sheet. After the vacuum suction cup group absorbs the sheet, it rises, and the weighing sensor sends the current weight data to the laminating machine. After receiving the current weight data, the laminating machine compares it with the previous weight data. If the weight change this time is within the standard range of the average weight, it means that the suction cup has only sucked away Single sheet; if it exceeds the standard range of average weight, it indicates that the sucked sheet may be sticky and entrained. At this time, the laminating machine lifts the vacuum suction cup group to the preset position, and then the transmission part drives the light transmittance detection unit close to the vacuum suction cup group, so that the sheet enters the detection slot, and the average light transmittance of the sucked sheet is detected by the light transmittance detection unit. If the average light transmittance of the sucked sheet is within the standard range, it means that the current suction cup only sucks away a single sheet. If it exceeds the standard range of average light transmittance, it indicates that the sucked sheet is sticky and entrained, the laminating machine stops working, and issues an alarm reminder.

[0027] The detection device provided in the present application performs a first adhesion and entrainment determination on the sucked sheet material through a weighing sensor, and performs a second adhesion and entrainment determination on the sucked sheet material through a light transmission detector, thereby improving the detection accuracy of adhesion and entrainment and solving the problems of false detection and missed detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail the exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0029] Figure 1 is an exploded schematic diagram of the detection device in Example 1 of the present application;

[0030] Figure 2 is a side view of the detection device in Example 1 of the present application;

[0031] Figure 3 This is a schematic diagram of the structure of the bottom plate in Example 2 of the present application;

[0032] Figure 4 is a schematic diagram of the structure of the light transmission detector in Example 3 of the present application;

[0033] Figure 5 It is a schematic diagram of the process of the detection method in Example 4 of the present application.

[0034] Reference numerals:

[0035] 1. Bottom plate;

[0036] 2. Loading plate;

[0037] 3. light transmission detector; 31. light transmission detection unit; 311. U-shaped plate; 3111. first inner wall surface; 3112. second inner wall surface; 312. optical fiber transmitter; 313. optical fiber receiver; 32. transmission member; 33. detection slot;

[0038] 4. Weighing device; 41. Weighing sensor; 42. Limiting protrusion;

[0039] 5. Static eliminator;

[0040] 6. Auxiliary separator; 61. Driving member; 62. Clamping member; 620. Clamping surface;

[0041] 7. Through-beam photoelectric sensor; 8. Vacuum suction cup assembly; 9. Laminated sheet assembly. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0043] In the prior art, in order to avoid product quality problems caused by adhesion and entrainment of multiple sheets when sucking materials, a common method is to arrange ultrasonic single-sheet and double-sheet sensors for detection. However, ultrasonic single-sheet and double-sheet sensors can only detect one point, but adhesion may occur at any position. In this case, even if the number of sensors is increased, there will still be missed detections, and for materials that are too thin and tightly attached, ultrasonic single-sheet and double-sheet sensors cannot accurately measure. In view of this, the embodiments of the present application provide a detection device and a detection method, which are described in detail below through multiple embodiments.

[0044] In response to the above problems, an embodiment of the present application provides a detection device, which performs a first adhesion and entrainment judgment on the sucked sheet material through a weighing sensor 41, and performs a second adhesion and entrainment judgment on the sucked sheet material through a light-transmitting detector 3, thereby improving the detection accuracy of adhesion and entrainment and solving the problems of false detection and missed detection.

[0045] In the embodiment of the present application, the sheet material is a semi-cured PP sheet, and the detection device and the detection method in the specific implementation manner are described in detail.

[0046] Example 1

[0047] Embodiment 1 of the present application provides a detection device that can realize dual adhesion and entrainment detection through a weighing device 4 and a light transmission detector 3, thereby improving the accuracy of detection and reducing the defective rate of circuit board manufacturing. Figure 1 and Figure 2 The detection device comprises a bottom plate 1, a carrying plate 2 and a light transmission detector 3, and a weighing device 4 and an electrostatic eliminator 5 are provided on the bottom plate 1;

[0048] The load-bearing plate 2 is parallel to the bottom plate 1, and the load-bearing plate 2 is connected to the bottom plate 1 via a weighing device 4;

[0049] The static eliminator 5 is disposed around the side of the carrier plate 2, and the ion output end of the static eliminator 5 is located above the reference surface of the carrier plate 2;

[0050] The light transmission detector 3 is located on the reference surface of the carrier plate 2 and on one side of the carrier plate 2. The light transmission detector 3 includes a light transmission detection unit 31 and a transmission member 32. The light transmission detection unit 31 has a detection slot 33.

[0051] After the sheet is sucked up by the vacuum suction cup assembly 8 , the transmission member 32 drives the light transmission detection unit 31 to approach the sheet so that part of the sheet is located in the detection slot 33 .

[0052] In the field of electronic manufacturing, PCB (Printed Circuit Board) circuit boards are the key carriers for connecting electronic components. In order to ensure that electronic components can work stably, the production of PCB circuit boards requires multiple processes, one of the important steps is the lamination process. Lamination, or lamination, is the process of bonding insulating materials, copper foil and prepreg into a whole under a certain temperature and pressure. The purpose of lamination is to fuse the inner core board of the stacked prepreg PP sheet (composed of resin and glass fiber) together through a hot melt machine to ensure the alignment of different layers of graphics to avoid inter-layer slippage during subsequent processing. Multiple inner core boards are glued together under high temperature and high pressure to form a multi-layer board.

[0053] Specifically, the base plate 1 is installed on the material picking station of the laminating machine (i.e., the area where the vacuum suction cup group 8 sucks the material). The base plate 1 and the supporting plate 2 are both plate-like structures, made of lightweight materials, such as aluminum alloy and plexiglass. The base plate 1 and the supporting plate 2 made of lightweight materials can reduce the dead weight of the detection device, making it easier for production personnel to replace and transport the semi-cured PP sheets according to the size specifications. The base plate 1 and the supporting plate 2 can be rectangular, circular or other shaped plates according to actual needs.

[0054] The carrier plate 2 has a top surface, a bottom surface and four side surfaces. The top surface is a straight surface and serves as a reference surface for placing the semi-cured PP sheet. A weighing device 4 is provided on the bottom plate 1. The bottom surface of the carrier plate 2 abuts against the weighing device 4, so that the carrier plate 2 can be laid horizontally on the bottom plate 1. Several superimposed semi-cured PP sheets are laid on the reference surface, which can ensure that the weighing device 4 is evenly stressed and reduce measurement errors. The static eliminator 5 is installed on the bottom plate 1 and is located on the side of the carrier plate 2. Specifically, the number of static eliminators 5 can be one, two, three or more than four. In this embodiment, static eliminators 5 are arranged on the four sides of the carrier plate 2, which is convenient for uniform negative ion static elimination of the semi-cured PP sheet and improves the static elimination effect.

[0055] The transmission member 32 may be a stepper motor in combination with a gear transmission, a push rod motor and a cylinder.

[0056] Among them, the static eliminator 5 can be an ionization type static eliminator, a negative ion type static eliminator, or an electromagnetic wave type static eliminator. The ionization type static eliminator eliminates static electricity by releasing ionized gas, such as an ionization fan and an ionization rod. The negative ion type static eliminator eliminates static electricity by releasing negative ions, such as a negative ion generator and a negative ion fan. The electromagnetic wave type static eliminator eliminates static electricity by releasing electromagnetic waves, such as an electromagnetic wave static eliminator.

[0057] The light transmission detector 3 is located above the reference surface of the carrier plate 2. In this embodiment, the distance between the light transmission detector 3 and the carrier plate 2 can be freely set according to the actual production situation. It is only necessary to ensure that the carrier plate 2 has enough space to store a certain number of semi-cured PP sheets. The light transmission detector 3 is located on one side of the carrier plate 2, and will not hinder the vacuum suction cup group 8 from moving up and down and sucking the semi-cured PP sheets. When the weighing device 4 detects that the semi-cured PP sheets sucked by the vacuum suction cup group 8 exceed the set average weight standard range, the laminating machine can perform a braking operation, and the vacuum suction cup group 8 stays in mid-air, so that the detection slot 33 of the light transmission detection unit 31 is on the same horizontal plane as the semi-cured PP sheet. Under the drive of the transmission member 32, the light transmission detection unit 31 approaches the semi-cured PP sheet, and the semi-cured PP sheet enters the detection slot 33, completing the light transmittance detection of the semi-cured PP sheet. In this embodiment, the light transmission detector 3 can be installed on the laminating machine or on the bottom plate 1. The distance between the light transmission detector 3 and the carrier plate 2 can be set according to actual needs, and is not the only limitation here.

[0058] The light transmittance of PP sheets is related to thickness, the thicker the sheet, the lower the light transmittance. For example, the light transmittance of one PP sheet is 50%, and the light transmittance of two PP sheets is 50%*50%=25%. The total light transmittance of N sheets is the Nth power of the light transmittance. The size of PP sheets generally needs to be die-cut according to production needs. Generally speaking, the length and width of PP sheets are generally between 400 and 700 mm, and the thickness is 0.02 to 0.2 mm. The weight varies according to the size and thickness. Therefore, in order to facilitate technical personnel in this field to clearly grasp the design ideas of the present invention, the following is a detailed description of the working process of the detection device, assuming that the average weight of the PP sheet is 30g, the allowable weight error is 5g; the average light transmittance is 50%, and the allowable light transmittance error is 5%:

[0059] After starting the laminating machine, the technician inputs the standard range of the average weight of a single semi-cured PP sheet, for example, the average weight is 30g, the weight error is set to 20%, and the standard range is set to 24.0g~36.0g, and the standard range of the average light transmittance, for example, the average light transmittance is 50%, the allowable error is 5%, and the standard range is set to 45.0%~55.0% into the laminating machine, and then the laminating machine reads the weight data of the weighing device 4, the static eliminator 5 eliminates the static electricity of the semi-cured PP sheet on the carrier plate 2, and then the vacuum suction cup group 8 descends to vacuum absorb the semi-cured PP sheet, and the vacuum suction cup group 8 is vacuumed. After the empty suction cup group 8 sucks the semi-cured PP sheet, it rises. The weighing sensor 41 sends the current weight data to the laminating machine. After receiving the current weight data, the laminating machine compares it with the previous weight data. If the weight change this time is within the preset range, it indicates that the suction cup only sucks away a single semi-cured PP sheet; if it exceeds the preset range, it indicates that the sucked semi-cured PP sheet may be bonded and entrained. The laminating machine lifts the vacuum suction cup group 8 to the preset position, and the controller transmission member 32 drives the light transmission detection unit 31 to approach the vacuum suction cup group 8, so that the semi-cured PP sheet can enter the detection slot 33. Then the light transmission detection unit 31 detects the average light transmittance of the sucked semi-cured PP sheet. If the average light transmittance of the sucked semi-cured PP sheet is within the preset range, it means that the current suction cup only sucks away a single semi-cured PP sheet. If it exceeds the preset range of the average light transmittance, it indicates that the sucked semi-cured PP sheet is bonded and entrained. The laminating machine stops working and issues an alarm reminder. The staff manually peels off the semi-cured PP sheet on the vacuum suction cup group 8.

[0060] Compared with the prior art, the detection device performs the first adhesion and entrainment judgment on the sucked semi-cured PP sheet through the weighing sensor 41, and performs the second adhesion and entrainment judgment on the sucked semi-cured PP sheet through the light transmission detector 3, thereby improving the detection accuracy of adhesion and entrainment and solving the problems of false detection and missed detection.

[0061] Example 2

[0062] Generally speaking, there is a huge bonding pressure between the stacked PP sheets, which causes the film materials to stick together. In order to improve the success rate of the vacuum suction cup group 8 sucking a single semi-cured PP sheet, the embodiment 2 of the present application also designs a corresponding structure. On the basis of the above embodiment 1, please refer to Figure 3 The above-mentioned detection device also includes a plurality of auxiliary separators 6, which are arranged in a ring outside the carrier plate 2. The auxiliary separators 6 include a driving member 61 and a clamping member 62. The driving member 61 is installed on the bottom plate 1 through a bracket. The clamping surface 620 of the clamping member 62 is located on the reference plane of the carrier plate 2 and is perpendicular to the reference plane of the carrier plate 2.

[0063] The driving member 61 is used to drive the clamping member 62 to move closer to or away from the side of the semi-cured PP sheet.

[0064] The clamping surface 620 of the clamping member 62 is perpendicular to the reference surface of the carrier plate 2, which can ensure that the clamping surface 620 can fit the side of the stacked sheet group 9. Before the vacuum suction cup group 8 descends and vacuum-absorbs the semi-cured PP sheet, the driving member 61 drives the clamping member 62 to move toward the side of the semi-cured PP sheet, so that the clamping member 62 can abut the stacked sheet group 9. After the vacuum suction cup group 8 absorbs the semi-cured PP sheet, the outer edge of the PP sheet on the first layer is separated from the clamping surface 620 under the suction force of the vacuum suction cup group 8, because the PP sheet has a certain flexibility, and the semi-cured PP sheet on the second layer is subjected to the additional resistance of the clamping member 62, forcing the second layer of semi-cured PP sheet to separate from the first layer of semi-cured PP sheet. Under the dual action of the static eliminator 5 and the auxiliary separator 6, the separation effect of the first layer of semi-cured PP sheet and the stacked sheet group 9 is improved.

[0065] At least two auxiliary separators 6 can be provided on each of the four sides of the carrier plate 2. In a preferred embodiment, the auxiliary separators 6 provided on each side are arranged opposite to each other, thereby ensuring that the stacked sheet group 9 can be stably clamped. The auxiliary separators 6 on each side of the carrier plate 2 are located at both ends of the static eliminator 5 to prevent the auxiliary separators 6 from blocking the static elimination effect of the static eliminator 5.

[0066] In this embodiment, the driving member 61 can adopt a push rod motor and a cylinder. When the driving member 61 is a cylinder, the piston rod of the cylinder is connected to the clamping member 62. When the vacuum suction cup group 8 descends, the cylinder pushes the clamping member 62 to abut against the stacked sheet group 9, so that the stacked sheet group 9 is fixed on the supporting plate 2. In the process of the vacuum suction cup group 8 sucking the semi-cured PP sheet, the clamping member 62 can provide additional resistance for the stacked sheet group 9. The first layer of PP sheet is also subjected to the suction from the vacuum suction cup group 8. Therefore, the clamping member 62 does not affect the up and down movement of the first layer of PP sheet when clamping the stacked sheet group 9, separates the first layer of semi-cured PP sheet from other layers of semi-cured PP sheets, and improves the success rate of the vacuum suction cup group 8 sucking a single semi-cured PP sheet.

[0067] Furthermore, in order to increase the friction force on the stacked sheet group 9, a friction structure is further provided on the clamping surface 620 of the clamping member 62, and the friction structure includes at least one of a protrusion, a serrated groove and a friction pad. In this embodiment, if the friction structure is a convex block, the convex blocks are arranged at intervals in the length direction and the width direction of the clamping surface 620;

[0068] If the friction structure is a sawtooth groove, the sawtooth grooves are evenly distributed on the clamping surface 620;

[0069] If the friction structure is a friction pad, the friction pad is laid on the clamping surface 620, and the friction pad is made of rubber or silicone. The three different friction structures can be arranged on a clamping member 62 alone or in cooperation with each other. The material of the friction structure on the clamping surface 620 can be selected according to the thickness of the PP sheet. The clamping member 62 of different material structures, such as plastic, wood, metal, etc.

[0070] A detection device provided in Example 2 of the present application has auxiliary separators 6 that are symmetrical to each other set on the bottom plate 1. When the vacuum suction cup group 8 absorbs the first layer of semi-cured PP sheet, an additional resistance is applied to the second layer of semi-cured PP sheet through the auxiliary separator 6, thereby ensuring that the first layer of semi-cured PP sheet can be separated from the stacked sheet group 9, further reducing the probability of adhesion and entrainment of the semi-cured PP sheets.

[0071] Example 3

[0072] In order to enable the detection devices described in Examples 1 and 2 to achieve accurate measurement results, Example 2 of the present application also designs a corresponding weighing device 4. Based on the above Examples 1 and 2, please refer to Figure 1 and Figure 4 The weighing device 4 of the detection device in Example 2 of the present application includes at least three weighing sensors 41, which are equidistantly distributed on the bottom plate 1. The at least three weighing sensors 41 are enclosed to form a weighing surface, and the center line of the weighing surface coincides with the center of gravity of the semi-cured PP sheet. For example, three weighing sensors 41 are arranged on the bottom plate 1, and the three sensors are arranged at intervals of 120 degrees with the center of gravity of the stacked sheet group 9 as the center of the circle, so that the weight is evenly distributed on each weighing sensor 41.

[0073] Specifically, the weighing sensor 41 may be a pressure sensor, a weight sensor, a piezoelectric sensor, etc. In this embodiment, the measurement accuracy of the weighing sensor 41 is 200 mg to 2000 mg.

[0074] Furthermore, in order to ensure the spatial stability of the supporting plate 2 , in the above specific implementation, a limiting protrusion 42 is provided on the weighing sensor 41 of the above detection device, and a groove corresponding to the limiting protrusion 42 is provided on the supporting plate 2 .

[0075] In a preferred embodiment, the light transmission detection unit 31 of the above-mentioned detection device includes a U-shaped plate 311, a fiber optic transmitter 312 and a fiber optic receiver 313, the U-shaped plate 311 is connected to the transmission member 32, the U-shaped plate 311 has a first inner wall surface 3111 and a second inner wall surface 3112 which are parallel, the fiber optic transmitter 312 is arranged on the first inner wall surface 3111, the fiber optic receiver 313 is arranged on the second inner wall surface 3112, and the fiber optic transmitter 312 and the fiber optic receiver 313 are arranged opposite to each other.

[0076] Furthermore, the transmission member 32 of the detection device comprises a cylinder, which is fixed on the machine platform of the pressing machine through a bracket, and the piston rod of the cylinder is connected to the U-shaped plate 311 .

[0077] In a preferred embodiment, the detection device further includes a through-beam photoelectric sensor 7, which is arranged at the four corners of the bottom plate 1, and is used to monitor whether the sheet falls after being sucked by the vacuum suction cup group 8. After the vacuum suction cup group 8 sucks the semi-cured PP sheet, pressure release may occur, causing the semi-cured PP sheet to fall from the vacuum suction cup group 8, and the position of the fallen semi-cured PP sheet on the carrier plate 2 changes, causing the vacuum suction cup group 8 to suck the semi-cured PP sheet again after the last suction action. When the semi-cured PP sheet is sucked again, the graphics of different layers cannot be aligned, causing the entire circuit board to be scrapped. Therefore, by setting the through-beam photoelectric sensor 7, the above situation can be avoided. After detecting that the semi-cured PP sheet falls, the through-beam photoelectric sensor 7 can send abnormal information to the laminating machine, and the laminating machine stops after receiving the information and sends an alarm reminder.

[0078] Example 4

[0079] On the basis of the above-mentioned embodiments 1 to 3, the embodiment of the present application further provides a detection method of the detection device, and the detection method comprises:

[0080] Obtaining preset parameters of a single semi-cured PP sheet, wherein the preset parameters include a preset range of average weight and a preset range of average light transmittance;

[0081] Using the static eliminator 5 of the detection device to eliminate static electricity of the semi-cured PP sheet;

[0082] The semi-cured PP sheet on the carrier plate 2 is sucked by the vacuum suction cup group 8;

[0083] If the weight of the semi-cured PP sheet sucked by the vacuum suction cup group 8 is greater than the preset range of the average weight, the transmittance detector 3 of the detection device is used to detect the transmittance of the semi-cured PP sheet currently sucked. If the transmittance detection result shows that the transmittance is less than the preset range of the average transmittance, the laminating machine is used to issue an alarm reminder.

[0084] Furthermore, before the semi-cured PP sheet on the carrier plate 2 is sucked by the vacuum suction cup group 8, the method further comprises: clamping the semi-cured PP sheet on the carrier plate 2 by the auxiliary separator 6 of the detection device;

[0085] While the vacuum suction cup group 8 is used to suck the semi-cured PP sheet on the carrier plate 2, the method further includes: using the reflected photoelectric sensor 7 of the detection device to detect whether the semi-cured PP sheet sucked by the vacuum suction cup group 8 falls off, and if so, using the laminating machine to send an alarm reminder.

[0086] Specifically, when the laminating machine is working, the program reads the value of the weighing device 4 in advance and stores the result. Then the vacuum suction cup group 8 descends and turns on the vacuum to suck the semi-cured PP sheet. When the vacuum pressure reaches the set value, the auxiliary separator 6 extends and the suction cup rises. Because the auxiliary separator 6 creates additional resistance to the edge of the second layer of material, the second layer of material is forced to separate from the first layer of material. The auxiliary separator 6 retracts and the value of the weighing device 4 is read again. Subtract the two readings before and after, and compare the result with the preset value of the program: assuming that the weight of each piece of material is basically equal, the deviation value should be within a certain range, proving that the suction cup only sucked away one piece of material; if the deviation value is too large, it proves that the material is adhered and the vacuum suction cup group 8 took away multiple pieces of material. Combined with the light transmission detector 3, the semi-cured PP sheet on the vacuum suction cup group 8 is detected and confirmed, and the alarm is promptly stopped.

[0087] Specifically, based on the detection device in the embodiment of the present application, the present application also provides an application example of the detection method of the detection device, please refer to Figure 5 ,include:

[0088] 101. Start the laminating machine, input the average weight range and the average light transmittance range according to the properties of the semi-cured PP sheet, and the weighing device 4 records the weight information of the current laminated sheet group 9;

[0089] 102. The auxiliary separator 6 clamps the stacked sheet group 9. After the vacuum suction cup group 8 absorbs the semi-cured PP sheet, the auxiliary separator 6 releases the stacked sheet group 9, and the weighing device 4 records the weight information of the remaining stacked sheet group 9;

[0090] 103. Determine whether the weight information of the remaining stacked sheet group 9 and the center information of the current stacked sheet group 9 are within the average weight range. If so, execute step 107; otherwise, execute step 104;

[0091] 104. The laminating machine controls the vacuum suction cup group 8 to stay at a preset position, and the transmission member 32 drives the light transmission detection unit 31 to move toward the vacuum suction cup group 8, so that the sucked semi-cured PP sheet enters the detection groove 33;

[0092] 105. The light transmittance detection unit 31 detects the light transmittance of the sucked semi-cured PP sheet, and determines whether the light transmittance of the sucked semi-cured PP sheet is within the average light transmittance range. If so, execute step 107; if not, execute step 106;

[0093] 106. The pressing machine issues a warning and stops running, which is then manually handled by the operator;

[0094] 107. Carry out the pressing work according to the set pressing procedure.

[0095] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0096] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0097] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0098] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0099] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A detection device, characterized in that: It includes a bottom plate, a carrying plate and a light transmission detector, wherein a weighing device and a static eliminator are arranged on the bottom plate, the carrying plate is parallel to the bottom plate, and the carrying plate is connected to the bottom plate through the weighing device; The static eliminator is arranged in a ring on the side of the supporting plate, and the ion output end of the static eliminator is located above the reference surface of the supporting plate; The light transmission detector is located on the reference surface of the carrying plate and on one side of the carrying plate. The light transmission detector includes a light transmission detection unit and a transmission member. The light transmission detection unit has a detection slot. After the sheet is sucked up by the vacuum suction cup assembly, the transmission member drives the light transmission detection unit to approach the sheet so that part of the sheet is located in the detection groove.

2. The detection device according to claim 1, characterized in that: It also includes a plurality of auxiliary separators, which are arranged on the outer side of the bearing plate; The auxiliary separator includes a driving member and a clamping member, the driving member is connected to the bottom plate through a bracket, and the clamping surface of the clamping member is located on the reference surface of the bearing plate and is perpendicular to the reference surface of the bearing plate; Wherein, the driving member is used to drive the clamping member to move closer to or away from the side of the sheet.

3. The detection device according to claim 2, characterized in that: The clamping surface is also provided with a friction structure, which includes at least one of a protrusion, a serrated groove and a friction pad.

4. The detection device according to claim 1, characterized in that: The weighing device comprises at least three weighing sensors, which are equidistantly distributed on the bottom plate. The at least three weighing sensors enclose a weighing surface, and the center line of the weighing surface coincides with the center of gravity of the sheet.

5. The detection device according to claim 4, characterized in that: The weighing sensor is provided with a limiting protrusion, and the bearing plate is provided with a groove corresponding to the limiting protrusion.

6. The detection device according to claim 1, characterized in that: The light transmission detection unit includes a U-shaped plate, a fiber optic transmitter and a fiber optic receiver. The U-shaped plate is connected to a transmission member. The U-shaped plate has a first inner wall surface and a second inner wall surface that are parallel to each other. The fiber optic transmitter is arranged on the first inner wall surface, and the fiber optic receiver is arranged on the second inner wall surface. The fiber optic transmitter and the fiber optic receiver are arranged opposite to each other.

7. The detection device according to claim 6, characterized in that: The transmission member comprises a cylinder, which is mounted on the machine platform of the pressing machine through a bracket, and a piston rod of the cylinder is connected to the U-shaped plate.

8. The detection device according to claim 1, characterized in that: It also includes a plurality of photoelectric sensors, which are respectively arranged on the four corners of the bottom plate and are used to monitor whether the sheet falls after being sucked by the vacuum suction cup group.

9. A detection method, characterized in that: Detection is performed based on the detection device according to any one of claims 1 to 8, and the detection method comprises: Acquiring preset parameters of a single sheet, wherein the preset parameters include a preset range of average weight and a preset range of average light transmittance; Eliminating static electricity of the sheet material using the static eliminator of the detection device; Using a vacuum suction cup group to suck the sheet on the carrier plate; If the weight of the sheet sucked up by the vacuum suction cup group is greater than the preset range of the average weight, the transmittance detector of the detection device is used to detect the transmittance of the currently sucked sheet. If the transmittance detection result shows that the transmittance is less than the preset range of the average transmittance, the laminating machine is used to issue an alarm reminder.

10. The detection method according to claim 9, characterized in that: Before the vacuum suction cup assembly is used to suck the sheet material on the carrier plate, the method further comprises: clamping the sheet material on the carrier plate by using an auxiliary separator of the detection device; While the vacuum suction cup group is used to suck the sheet material on the carrier plate, the method further comprises: using a photoelectric sensor of a detection device to detect whether the sheet material sucked by the vacuum suction cup group falls off, and if so, using a laminating machine to send an alarm reminder.

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