Detection equipment and detection process for double-sided detection of single material

Abstract

The invention discloses detection equipment and a detection process for double-sided detection of a single material, and relates to the technical field of printed matter detection. The visual detection system comprises a first visual detection system, a second visual detection system, a first transfer unit and a second transfer unit which are sequentially arranged in the material conveying direction. Automatic feeding can be achieved, full-automatic detection is achieved in cooperation with the first transfer unit and the second transfer unit, so that the detection precision and speed are improved, the automation and intelligence degree is greatly improved, and the problems that in the prior art, manual naked eye inspection is conducted on material printing superfine lines through an electronic magnifying lens, and the detection efficiency is high are solved. The work intensity is large, workers are easy to fatigue after long-time work, the detection accuracy is unstable, and the quality cannot be guaranteed. The materials are continuously transferred and suspended to the position above the second detection unit, the materials can be transferred to the next working procedure after detection, and the time of the detection process can be effectively saved.

Description

Technical Field

[0001] This invention belongs to the field of printed matter inspection technology, specifically relating to an inspection device and process for double-sided inspection of single-sheet materials. Background Technology

[0002] Single-sheet printed materials are available in both single-sided and double-sided printing specifications. After printing, the materials need to be inspected for printing quality before they can be shipped out. Currently, the on-site inspection is semi-automatic, with manual inspection of the extremely fine lines printed on the material using an electronic magnifying glass. This is labor-intensive, and workers are prone to fatigue after long hours of work. The accuracy of the inspection is also unstable, and the quality cannot be guaranteed. To solve at least one of the above technical problems, it is necessary to develop an inspection device and process for double-sided inspection of single-sheet materials. Summary of the Invention

[0003] The purpose of this invention is to provide a detection device and process for double-sided inspection of single-sheet materials to solve the above-mentioned technical problems. It can realize automatic feeding and fully automatic detection in conjunction with the first transfer unit and the second transfer unit, thereby improving detection accuracy and speed, greatly improving the degree of automation and intelligence. It solves the problems of manual inspection of the extremely fine lines printed on the material by the naked eye through an electronic magnifying glass in the prior art, which is labor-intensive, easy for workers to get tired after long hours of work, and the detection accuracy is unstable and the quality cannot be guaranteed.

[0004] In this technical solution, the first transfer unit moves the material below the imaging end of the first vision inspection system. The first transfer unit releases its grip on the material. After the first vision inspection system inspects the front side of the material, the second transfer unit picks up the material and transfers it, suspending the material above the second vision inspection system to inspect the back side. After the inspection is completed, the second transfer unit can transfer the material to the next process based on the inspection results. This avoids the need for a series of cumbersome operations, such as flipping the material and placing it on a platform, and moving the robotic arm to a space that does not interfere with the inspection, required for each sheet of material to be inspected. The inspection method of the second transfer unit picking up the material and suspending it above the second vision inspection system in this application enables continuous material transfer and suspension above the second inspection unit, and after inspection, it can be transferred to the next process, which can effectively save inspection time.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows:

[0006] A detection device for double-sided inspection of a single sheet of material includes a vision inspection system capable of inspecting the material. The vision inspection system comprises a first vision inspection system and a second vision inspection system arranged sequentially along the material process transport direction.

[0007] The inspection equipment also includes a first transfer unit that grasps and places material below the imaging end of the first vision inspection system to inspect the front side of the material, and a second transfer unit that grasps the material after inspection by the first vision inspection system, suspends it above the second inspection system to inspect the back side of the material, and then transfers the material to the next process. By setting up a first vision inspection system and a second vision inspection system, and by using the first transfer unit to grasp the material below the imaging end of the first vision inspection system for inspection, and then using the second transfer unit to transfer the material above the second vision inspection system and suspend it so that the second vision inspection system faces upward to inspect the back side of the material, this operation method can achieve automatic feeding and fully automatic inspection in conjunction with the first and second transfer units, thereby improving inspection accuracy and speed, greatly improving the degree of automation and intelligence, and solving the problems of manual visual inspection of extremely fine lines printed on materials using electronic magnifying glasses in the existing technology, which is labor-intensive, causes worker fatigue due to long working hours, and results in unstable inspection accuracy and unreliable quality.

[0008] In this technical solution, the first transfer unit moves the material below the imaging end of the first vision inspection system. The first transfer unit releases its grip on the material. After the first vision inspection system inspects the front side of the material, the second transfer unit picks up the material and transfers it, suspending the material above the second vision inspection system to inspect the back side. After the inspection is completed, the second transfer unit can transfer the material to the next process based on the inspection results. This avoids the need for a series of cumbersome operations, such as flipping the material and placing it on a platform, and moving the robotic arm to a space that does not interfere with the inspection, required for each sheet of material to be inspected. The inspection method of the second transfer unit picking up the material and suspending it above the second vision inspection system in this application enables continuous material transfer and suspension above the second inspection unit, and after inspection, it can be transferred to the next process, which can effectively save inspection time.

[0009] Preferably, the first visual inspection system includes a platform on which materials can be placed, and a first inspection unit positioned above the platform and facing downwards to take pictures. The platform facilitates the support of materials, ensuring the front of the materials faces upwards. The first inspection unit is positioned above the platform with its camera facing downwards to inspect the front of the materials. In this configuration, the first inspection unit, the material, and the platform are arranged sequentially. The material is picked up by a first transfer unit and placed on the platform, while the first inspection unit inspects the front of the materials. This automated inspection operation avoids human error, improves the stability of inspection results, and enhances inspection quality, accuracy, and speed.

[0010] Preferably, the second visual inspection system includes a second inspection unit capable of shooting upwards, and the second inspection unit is disposed on one side of the first visual inspection system along the material transfer process direction. In the non-inspection state, the shooting direction of the second inspection unit is unobstructed. Specifically, the second inspection unit is disposed on one side of the first inspection unit; a single material has a front and a back side, wherein the first inspection unit shoots vertically downwards, and the second inspection unit shoots vertically upwards, corresponding to inspecting the front and back sides of the single material respectively. When the second transfer unit picks up the material and suspends it above the second inspection unit, a visual inspection of the back side of the single material is performed. After the inspection is completed, the second transfer unit can transfer the material to the next process based on the inspection result. This avoids the cumbersome operations required in the prior art, such as flipping the single material and placing it on a platform, and moving the robotic arm to a space that does not interfere with the inspection. This application continuously transfers the material and suspends it above the second inspection unit; after inspection, it can be transferred to the next process, effectively saving inspection time.

[0011] Both the first detection unit and the second detection unit include a light source, a camera, and an industrial control computer, which enable them to photograph and identify materials and to check and judge the printing quality.

[0012] The second transfer unit picks up the material that has been inspected by the first detection unit and transfers it, suspending the material above the second detection unit for reverse side inspection. This inspection method, in conjunction with the first detection unit, enables automated inspection of both sides of the material, thereby improving inspection accuracy and speed, greatly enhancing automation and intelligence. It solves the problems of manual inspection of extremely fine lines printed on materials using electronic magnifying glasses in existing technologies, which involves high workload, worker fatigue from long hours of work, unstable inspection accuracy, and compromised quality.

[0013] Preferably, the first transfer unit includes a first robotic arm disposed on one side of the first vision detection system, wherein the first robotic arm is provided with a first suction cup capable of grasping materials;

[0014] The position set by the first vision detection system falls within the moving range of the first manipulator for grasping materials. The first manipulator is arranged on one side of the placement table, and the position set by the placement table falls within the moving range of the first manipulator for grasping materials. By setting the first manipulator and the first suction cup, the material can be sucked and transferred by the first suction cup, realizing the function of the first transfer unit for grasping and transferring materials. The material is transferred by the first manipulator between the placement table and the first detection unit. At this time, the front side of the material faces upward, facilitating the detection of the front side of the material, realizing the automatic transfer of materials and cooperating with the first vision detection system to achieve automatic detection operations, avoiding the problem of manual introduction of detection errors, improving the stability of the detection results, as well as improving the detection quality, detection accuracy and speed. And the setting of the first manipulator facilitates the transfer of materials and improves the transfer efficiency of materials.

[0015] Preferably, the second transfer unit includes a second manipulator arranged on one side of the second vision detection system, and the second manipulator is provided with a second suction cup capable of grasping materials;

[0016] The positions set by the second vision detection system and the first vision detection system both fall within the moving range of the second manipulator for grasping materials. The second manipulator is arranged on one side of the second detection unit, and the positions set by the placement table and the second detection unit fall within the moving range of the second manipulator for grasping materials. By setting the second manipulator and the second suction cup, the material can be sucked and transferred by the second suction cup, realizing the function of the second transfer unit for grasping and transferring materials. After the material is detected in the first detection unit, the second manipulator moves and sucks the material through the second suction cup and hovers it above the second detection unit, so as to detect the reverse side of the material. After the second detection unit finishes the detection, according to the detection results, the second manipulator moves and transfers the material to the corresponding next process. For example, if both detection results are qualified products or one of the detection results is an unqualified product, for the unqualified product, the second manipulator moves and transfers the material to the first receiving rack, and for the qualified product, the second manipulator moves and transfers the material to the second receiving rack;

[0017] In a possible implementation manner, when the result of the first detection unit detecting the front side of the material is unqualified, the second manipulator grabs the material located above the placement table and transfers it into the first receiving rack, omitting the detection process of the second detection unit.

[0018] 2]The second manipulator has multiple functions such as transferring materials and hovering materials for auxiliary detection. It has the effect of streamlining processes and the required equipment, and continuous operation is convenient for improving the efficiency of the detection process.

[0019] Preferably, the first visual inspection system further includes a moving mechanism that can adjust the position of the first inspection unit relative to the platform. The moving mechanism improves the flexibility of the inspection process of the first inspection unit. If the position of the material placed on the platform by the first robotic arm deviates from the shooting range of the first inspection unit, the moving mechanism can move the first inspection unit to compensate for the incomplete inspection caused by the placement deviation. This reduces the accuracy requirement for the position of the material grasped by the first robotic arm, lowers the difficulty of the inspection process, and effectively improves the efficiency of the material transfer process by the first robotic arm because the accuracy requirement for the placement position of the first robotic arm is not high.

[0020] Preferably, the projection is extended along the detection direction of the first detection unit, and the direction of material transfer along the process on the projection plane is defined as the first direction, and the direction perpendicular to the direction of material transfer along the process is defined as the second direction.

[0021] The moving mechanism includes a first drive mechanism connected to the first detection unit and driving the first detection unit to move along both ends of a first direction, and a second drive mechanism capable of driving the first drive mechanism as a whole to move along both ends of a second direction, wherein the second drive mechanism is disposed above the platform. The vertical projection of the connection between the second drive mechanism and the platform does not interfere with the vertical projection of the first detection unit, thus avoiding interference between the two during operation.

[0022] The first driving mechanism includes a first frame, a first optical rod disposed within the first frame, a first lead screw movably connected to the first frame, and a first motor disposed on one side of the first frame and driven by the first lead screw. The first optical rods are arranged in pairs, and the first lead screw is disposed between the first optical rods and arranged parallel to each other. The first detection unit is provided with a connecting block, which is movably connected to the first optical rod and threadedly connected to the first lead screw, so that the first detection unit, driven by the first motor and the first lead screw, causes the connecting block to move in the two ends extending in the first direction.

[0023] The second drive mechanism includes a second frame connected above the platform, a second optical rod disposed within the second frame, a second lead screw movably connected to the second frame, and a second motor disposed on one side of the second frame and driven by the second lead screw. The second optical rods are arranged in pairs, and the second lead screw is disposed between the second optical rods and arranged parallel to each other. The second frame and the second optical rods are arranged in groups, and two groups are provided. The first frame is movably connected to the second optical rod, and the first frame is threadedly connected to the second lead screw. The extension directions of the first lead screw and the second lead screw are perpendicular to each other. The first detection unit moves in the first direction at both ends under the drive of the first motor and the first lead screw, and moves in the second direction at both ends under the drive of the second motor and the second lead screw on the first frame. This adjusts the target position of the vertical imaging surface of the first detection unit, corresponding to the position where the first robot arm grasps the material and places it on the platform. This reduces the accuracy requirement for the first robot arm to place the material on the platform, improves the error tolerance, and the cooperation of multiple units facilitates the implementation of the detection process.

[0024] Preferably, the detection equipment further includes a control terminal and a display electrically connected to the control terminal; the control terminal is electrically connected to the first vision detection system, the second vision detection system, the first transfer unit, and the second transfer unit. The control terminal is also electrically connected to the first detection unit, the second detection unit, the first robotic arm, and the second robotic arm. The display and control terminal facilitate timely monitoring of the system's operating status and allow for system adjustments.

[0025] Preferably, the testing equipment further includes a lifting material rack for placing materials. The lifting material rack has material storage and automatic lifting functions, and has an opening at the top. The first suction cup picks up the material through the opening and transfers it to the next process, such as the testing of the first testing unit, so that the robot arm can stably pick up the material.

[0026] Preferably, the inspection equipment further includes a receiving rack disposed on one side of the second vision inspection system along the material process transport direction;

[0027] The receiving rack includes a first receiving rack and a second receiving rack, both disposed on one side of the second vision inspection system. The end faces of the first and second receiving racks near the second inspection system are flush and both are disposed on one side of the second vision inspection system. Specifically, the first receiving rack is for collecting defective materials, and the second receiving rack is for collecting qualified materials. When both sides of the material are qualified, the second robotic arm transfers the material to the second receiving rack; when either side of the material is defective, the second robotic arm transfers the material to the first receiving rack.

[0028] This technical solution also provides a detection process for double-sided inspection of a single sheet of material, including detection equipment, comprising the following steps: a first robotic arm picks up the material and places it on a platform; a first detection unit faces downwards and photographs the front side of the material; after the first detection unit completes its inspection, a second robotic arm picks up the material that has been inspected by the first detection unit and suspends the material above the second detection unit, so that the back side of the material faces the second detection unit located below; the second detection unit inspects the back side of the material; after the second detection unit completes its inspection, the second robotic arm transfers the material to the next process.

[0029] This application has achieved beneficial technical effects:

[0030] This invention enables automatic feeding and fully automatic detection in conjunction with the first and second transfer units, thereby improving detection accuracy and speed, greatly enhancing automation and intelligence. It solves the problems of manual visual inspection of extremely fine lines printed on materials using electronic magnifying glasses in the prior art, which is labor-intensive, causes worker fatigue during long hours, and results in unstable detection accuracy and unreliable quality.

[0031] In this technical solution, the first transfer unit moves the material below the imaging end of the first vision inspection system. The first transfer unit releases its grip on the material. After the first vision inspection system inspects the front side of the material, the second transfer unit picks up the material and transfers it, suspending the material above the second vision inspection system to inspect the back side. After the inspection is completed, the second transfer unit can transfer the material to the next process based on the inspection results. This avoids the need for a series of cumbersome operations, such as flipping the material and placing it on a platform, and moving the robotic arm to a space that does not interfere with the inspection, required for each sheet of material to be inspected. The inspection method of the second transfer unit picking up the material and suspending it above the second vision inspection system in this application enables continuous material transfer and suspension above the second inspection unit, and after inspection, it can be transferred to the next process, which can effectively save inspection time. Attached Figure Description

[0032] Figure 1 The image shown is one of the structural schematic diagrams of the testing equipment;

[0033] Figure 2 The second schematic diagram of the testing equipment is shown.

[0034] Figure 3 The diagram shown is a partial structural schematic of the testing equipment;

[0035] Figure 4 The diagram shows the structure of the first robotic arm placing materials on the platform;

[0036] Figure 5 The diagram shows the structure of the second robotic arm transferring materials to the receiving rack.

[0037] Figure Labels

[0038] 1-First vision inspection system; 2-Second vision inspection system; 11-Placement platform; 12-First inspection unit; 21-Second inspection unit; 31-First robotic arm; 32-First suction cup; 41-Second robotic arm; 42-Second suction cup; 13-Moving mechanism; 14-First drive mechanism; 15-Second drive mechanism; 14-First frame; 142-First guide rod; 143-First lead screw; 144-First motor; 151-Second frame; 152-Second guide rod; 153-Second lead screw; 154-Second motor; 51-Control terminal; 52-Display; 53-Lifting material rack; 54-First receiving rack; 55-Second receiving rack. Detailed Implementation

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0040] The technical solution of the present invention will be described in detail below with specific embodiments.

[0041] Reference Figures 1 to 5 A detection device for double-sided inspection of a single sheet of material includes a vision inspection system capable of inspecting the material. The vision inspection system comprises a first vision inspection system 1 and a second vision inspection system 2 arranged sequentially along the material process transport direction.

[0042] The inspection equipment also includes a first transfer unit that grasps and places material below the imaging end of the first vision inspection system 1 to inspect the front side of the material, and a second transfer unit that grasps the material after inspection by the first vision inspection system 1, suspends it above the second inspection system 2 to inspect the back side of the material, and then transfers the material to the next process. By setting up a first vision inspection system 1 and a second vision inspection system 2, and by using the first transfer unit to grasp the material 6 below the imaging end of the first vision inspection system 1 for inspection, and then using the second transfer unit to transfer the material above the second vision inspection system 2 and suspend it there so that the second vision inspection system 2 faces upward to inspect the back side of the material, this operation method can achieve automatic feeding and fully automatic inspection in conjunction with the first and second transfer units, thereby improving inspection accuracy and speed, greatly improving the degree of automation and intelligence, and solving the problems of manual inspection of the extremely fine lines printed on the material with the naked eye using an electronic magnifying glass in the existing technology, which is labor-intensive, causes worker fatigue due to long working hours, and results in unstable inspection accuracy and unreliable quality.

[0043] In this technical solution, the first transfer unit moves the material below the imaging end of the first vision inspection system. The first transfer unit releases its grip on the material. After the first vision inspection system 1 inspects the front side of the material, the second transfer unit picks up the material and transfers it, suspending the material above the second vision inspection system 2 to inspect the back side of the material. After the inspection is completed, the second transfer unit can transfer the material to the next process according to the inspection results. This avoids the need for a series of cumbersome operations, such as flipping the material and placing it on the platform, and moving the robotic arm to a space that does not interfere with the inspection, required for the inspection of the front and back sides of a single sheet of material. The inspection method of the second transfer unit picking up the material and suspending it above the second vision inspection system 2 in this application realizes continuous material transfer and suspension above the second inspection unit 2. After inspection, the material can be transferred to the next process, which can effectively save inspection time.

[0044] The first visual inspection system 1 includes a platform 11 on which materials can be placed, and a first inspection unit 12 positioned above the platform 11 and facing downwards to take pictures. The platform 11 is designed to easily support materials, with the front of the material facing upwards. The first inspection unit 12 is positioned above the platform 11, with its camera facing downwards, to inspect the front of the material. In this configuration, the camera of the first inspection unit 12, the material, and the platform 11 are arranged sequentially. The material is picked up by a first transfer unit and placed on the platform 11, while the first inspection unit 12 inspects the front of the material. This automated inspection operation avoids errors introduced by human intervention, improves the stability of the inspection results, and enhances the quality, accuracy, and speed of the inspection.

[0045] The second visual inspection system 2 includes a second inspection unit 21 capable of shooting upwards. The second inspection unit 21 is disposed on one side of the first visual inspection system 12 along the material transport process direction. In the non-inspection state, the shooting direction of the second inspection unit 21 is unobstructed. In the inspection state, the shooting direction of the second inspection unit 21 is suspended with material to shoot and inspect the reverse side of the material. Specifically, the second detection unit 21 is located on one side of the first detection unit 12; a single material has a front and a back, wherein the first detection unit 12 takes a vertically downward shooting direction, and the second detection unit 21 takes a vertically upward shooting direction, corresponding to the detection of the front and back of the single material respectively. When the second transfer unit picks up the material and suspends the material above the second detection unit 21, the back of the single material is visually inspected. After the inspection is completed, the second transfer unit can transfer the material to the next process according to the inspection result. This avoids a series of cumbersome operations in the prior art, such as flipping the single material and placing it on the platform, and moving the robot arm to a space that does not interfere with the inspection. This application continuously transfers the material and suspends it above the second detection unit 21. After inspection, it can be transferred to the next process, which can effectively save inspection time.

[0046] Both the first detection unit 12 and the second detection unit 21 include a light source, a camera, and an industrial control computer, which enable them to photograph and identify materials and to check and judge the printing quality.

[0047] The second transfer unit picks up the material that has been inspected by the first detection unit 12 and transfers it, suspending the material above the second detection unit 21 for reverse side inspection. This inspection method, in conjunction with the first detection unit 12, realizes automated inspection of the front and back sides of the material, thereby improving the inspection accuracy and speed, greatly enhancing the level of automation and intelligence. It solves the problems of manual inspection of the extremely fine lines printed on the material with the naked eye using an electronic magnifying glass in the existing technology, which is labor-intensive, causes worker fatigue during long hours of work, and results in unstable inspection accuracy and unreliable quality.

[0048] The first transfer unit includes a first robotic arm 31 disposed on one side of the first vision detection system 1, wherein the first robotic arm 31 is provided with a first suction cup 32 capable of grasping materials;

[0049] The position of the first vision inspection system 1 falls within the material-grabbing movement range of the first robotic arm 31. The first robotic arm 31 is positioned on one side of the platform 11, and the platform 11 is positioned within the material-grabbing movement range of the first robotic arm 31. By setting up the first robotic arm 31 and the first suction cup 32, the material can be picked up and transferred by the first suction cup 32, realizing the function of the first transfer unit grasping and transferring material. The material is transferred by the first robotic arm 31 between the platform and the first inspection unit 12, with the front of the material facing upwards, facilitating inspection of the front of the material. This achieves automated material transfer and, in conjunction with the first vision inspection system 1, enables automated inspection operations, avoiding the problem of human-introduced inspection errors, improving the stability of inspection results, and enhancing inspection quality, accuracy, and speed. Furthermore, the placement of the first robotic arm 31 facilitates material transfer and improves material transfer efficiency.

[0050] The second transfer unit includes a second robotic arm 41 disposed on one side of the second vision detection system 2, wherein the second robotic arm 41 is provided with a second suction cup 42 capable of gripping materials;

[0051] The positions set by the second vision inspection system 2 and the first vision inspection system 1 both fall within the material-grabbing movement range of the second robotic arm 41. The second robotic arm 41 is positioned on one side of the second inspection unit 21, and the positions set by the platform 11 and the second inspection unit 21 fall within the material-grabbing movement range of the second robotic arm 41. By setting up the second robotic arm 41 and the second suction cup 42, the material can be picked up and transferred by the second suction cup 42, realizing the function of the second transfer unit in grabbing and transferring materials. After the material is inspected in the first inspection unit 12, the second robotic arm 41 moves and picks up the material through the second suction cup 42, suspending it above the second inspection unit 21 to inspect the reverse side of the material. After the second inspection unit 21 completes its inspection, the second robotic arm 41 moves and transfers the material to the corresponding next process based on the inspection results. If both inspection results are qualified or one inspection result is unqualified, the unqualified product corresponds to the second robotic arm 41 moving and transferring the material to the first receiving rack; the qualified product corresponds to the second robotic arm 41 moving and transferring the material to the second receiving rack.

[0052] In a possible implementation, when the first detection unit 12 detects the material from the front and finds it to be unqualified, the second robot arm 41 grabs the material located above the platform 11 and transfers it to the first receiving rack, thus omitting the detection process of the second detection unit 21.

[0053] The second robotic arm 41 has multiple functions, including transferring materials and suspending materials for auxiliary inspection. It has the effect of simplifying procedures and reducing the required equipment, and continuous operation facilitates the improvement of the efficiency of the inspection process.

[0054] The first visual inspection system 1 also includes a moving mechanism 13 that can adjust the position of the first inspection unit 12 relative to the platform 11. The moving mechanism 13 improves the flexibility of the inspection process of the first inspection unit 12. If the position of the material placed on the platform 11 by the first robotic arm 31 deviates from the shooting range of the first inspection unit 12, the moving mechanism 13 can move the first inspection unit 12 to compensate for the incomplete inspection caused by the placement deviation. This reduces the accuracy requirement for the position of the material grasped by the first robotic arm 31, lowers the difficulty of the inspection process, and effectively improves the efficiency of the material transfer process by the first robotic arm 31 because the accuracy requirement for the placement position of the first robotic arm 31 is not high.

[0055] Extend the projection along the detection direction of the first detection unit 12, define the material along the process transfer direction on the projection plane as the first direction, and the direction perpendicular to the material along the process transfer direction as the second direction.

[0056] The moving mechanism 13 includes a first driving mechanism 14 connected to the first detection unit 12 and driving the first detection unit 12 to move along both ends of a first direction, and a second driving mechanism 15 capable of driving the first driving mechanism 14 as a whole to move along both ends of a second direction. The second driving mechanism 15 is disposed above the platform 11. The vertical projection of the connection between the second driving mechanism 14 and the platform 11 does not interfere with the vertical projection of the first detection unit 12, thus avoiding interference between the two during operation.

[0057] The first driving mechanism 14 includes a first frame 141, a first optical rod 142 disposed within the first frame 141, a first lead screw 143 movably connected to the first frame 141, and a first motor 144 disposed on one side of the first frame 141 and drivenly connected to the first lead screw 143. The first optical rods 142 are arranged in pairs, and the first lead screw 143 is disposed between the first optical rods 142 and arranged parallel to each other. The first detection unit 12 is provided with a connecting block 121, which is movably connected to the first optical rod 142 and threadedly connected to the first lead screw 143, so that the first detection unit 12, driven by the first motor 144 and the first lead screw 143, moves the connecting block 121 in the two extending directions in the first direction x.

[0058] The second drive mechanism 15 includes a second frame 151 connected above the platform 11, a second guide rod 152 disposed within the second frame 151, a second lead screw 153 movably connected to the second frame 151, and a second motor 154 disposed on one side of the second frame 151 and drivenly connected to the second lead screw 153. The second guide rods 152 are arranged in pairs, and the second lead screw 153 is disposed between the second guide rods 152 and arranged parallel to each other. The second frame 151 and the second guide rods 152 are arranged in groups, and two groups are provided. The first frame 141 is movably connected to the second guide rods 152, and the first frame 141 is threadedly connected to the second lead screw 153. The extension directions of the first lead screw 143 and the second lead screw 153 are perpendicular to each other; the first detection unit 12 moves in the first direction x at both ends under the transmission of the first motor 144 and the first lead screw 143, and moves in the second direction y at both ends under the transmission of the second motor 154 and the second lead screw 153 to the first frame 141, thereby adjusting the target position of the vertical imaging surface of the first detection unit 12, corresponding to the position of the first robot arm 31 grasping the material and placing it on the platform, reducing the accuracy requirement of the first robot arm 31 placing the material on the platform, improving the fault tolerance rate, and the cooperation of multiple units facilitates the realization of the detection process.

[0059] In addition, the moving mechanism 13 can also avoid the first robotic arm 31 and prevent them from interfering with each other. For example, when the first robotic arm 31 places the material on the platform 11, the first robotic arm 31 does not interfere with the first detection unit 12 during its movement. If the position of the material is offset from the vertical downward shooting position of the shooting end of the first detection unit 12 or is not completely within the shooting range, the moving mechanism 13 moves the first detection unit 12 to directly above the material to perform detection, so that the first detection unit 12 can capture the entire material.

[0060] The detection equipment also includes a control terminal 51 and a display 52 electrically connected to the control terminal 51. The control terminal 51 is electrically connected to the first vision detection system 1, the second vision detection system 2, the first transfer unit, and the second transfer unit. The control terminal 51 is also electrically connected to the first detection unit 12, the second detection unit 21, the first robotic arm 31, and the second robotic arm 41. The display and control terminal facilitate timely monitoring of the system's operating status and allow for system adjustments.

[0061] The testing equipment also includes a lifting material rack 53 for placing materials. The lifting material rack 53 has material storage and automatic lifting functions, and has an opening at the top. The first suction cup picks up the material through the opening and transfers it to the next process, such as the first testing unit 12, so that the first robotic arm can stably pick up the material.

[0062] The inspection equipment also includes a receiving rack located on one side of the second vision inspection system 2 along the material process transfer direction;

[0063] The receiving rack includes a first receiving rack 54 and a second receiving rack 55, both disposed on one side of the second vision inspection system 2. The end faces of the first receiving rack 54 and the second receiving rack 55 are flush with the side of the second inspection system 2 and are both disposed on one side of the second vision inspection system 2. Specifically, the first receiving rack 54 is for collecting defective materials, and the second receiving rack 55 is for collecting qualified materials. When both sides of the material are qualified, the second robotic arm 41 transfers the material to the second receiving rack 55; when either side of the material is defective, the second robotic arm 41 transfers the material to the first receiving rack 54.

[0064] Both the first receiving rack 54 and the second receiving rack 55 are equipped with conveyor belts to facilitate material transport.

[0065] The positions of the end face of the first receiving rack 54 and the end face of the second receiving rack 55 near the second detection system are both within the material grasping and moving range of the second robot arm 41, which facilitates the second robot arm 41 to transfer the material to the corresponding receiving rack.

[0066] The material used in this technical solution is a single sheet of paper. The printing content on both sides of the single sheet of paper is inspected. The shooting direction of the first detection unit 12 and the shooting direction of the second detection unit 21 are set in opposite directions vertically. Specifically, the shooting direction of the first detection unit 12 is vertically downward and the shooting direction of the second detection unit 21 is vertically upward, so as to photograph the front and back of the material respectively.

[0067] This technical solution addresses the application scenario of double-sided inspection of single-sheet materials by designing a fully automated inspection device. This device enables automatic feeding, inspection, and automatic separation of good and defective products, achieving fully automated inspection, improving inspection accuracy and speed, and significantly enhancing automation and intelligence. It utilizes fully servo-controlled automation, employing a robotic arm for material feeding and retrieval, a vision inspection system for identification and inspection, and a multi-station conveyor belt system for separating and collecting good and defective products.

[0068] After the material is picked up by the first robotic arm 31 and placed on the front inspection station (i.e., the table) for inspection, the second robotic arm 41 transfers the material and suspends it above the reverse inspection station (i.e., above the second inspection unit 21). After inspection, the vision inspection system gives an OK or NG signal, corresponding to qualified and unqualified, respectively. The second robotic arm 41 places the material into two receiving racks according to whether it is a good product or a defective product, thus completing the collection work.

[0069] A detection process for double-sided inspection of a single sheet of material includes the following steps: a first robotic arm 31 picks up the material and places it on a table 11; a first detection unit 12 faces downwards and photographs the front side of the material; after the first detection unit 12 completes its inspection, a second robotic arm 41 picks up the material from the first detection unit 12 and suspends it above a second detection unit 21, so that the back side of the material faces the second detection unit 21 below; the second detection unit 21 inspects the back side of the material; after the second detection unit 21 completes its inspection, the second robotic arm 41 transfers the material to the next process. If the product is qualified, the material is transferred to a second receiving rack 55; if the product is unqualified, the material is transferred to a first receiving rack 54. In this technical solution, if both sides of the material pass the inspection, it is determined to be a qualified product; if either side fails, it is determined to be an unqualified product.

[0070] When the first robotic arm 31 picks up the material and places it on the platform 11, if the first detection unit 12 is pointing downwards and the material does not fall entirely into the shooting range, the moving mechanism 13 will adjust the position of the first detection unit 12 until the first detection unit 12 captures the entire range of the material.

[0071] When the second detection unit 21 detects the reverse side of the material, the material is grasped by the second robotic arm 41 and thus reaches a suspended state. If the material does not fall entirely into the shooting range when the second detection unit is shooting upwards, the position of the material is directly adjusted by the second robotic arm 41 until the second detection unit 21 shoots the entire range of the material. The second robotic arm 41 also has the function of adjusting the position of the material to facilitate more stable detection.

[0072] In a possible implementation, after the first detection unit 12 completes its inspection, if the result of the first detection unit 12's inspection of the material's front side is unqualified, the second robotic arm 41 grabs the material located above the storage platform 11 and transfers it into the first receiving rack 54, thus omitting the inspection process of the second detection unit. If the result of the first detection unit 12's inspection of the material's front side is qualified, the inspection operation of the second detection unit 21 continues.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0075] The embodiments of the detection equipment and detection process for double-sided inspection of single-sheet materials provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention, and the descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A testing device for double-sided inspection of a single sheet of material, comprising a vision inspection system capable of inspecting the material, characterized in that, The visual inspection system includes a first visual inspection system (1) and a second visual inspection system (2) arranged sequentially along the material process transport direction. The detection equipment also includes a first transfer unit that grabs and places the material below the shooting end of the first vision detection system (1) to detect the front side of the material, and a second transfer unit that grabs the material after it has been detected by the first vision detection system (1) and suspends it above the second detection system (2) to detect the back side of the material before transferring the material to the next process.

2. The detection device according to claim 1, characterized in that, The first visual inspection system (1) includes a platform (11) on which materials can be placed, and a first inspection unit (12) disposed above the platform (11) and facing downward to take pictures.

3. The detection device according to claim 1, characterized in that, The second visual inspection system (2) includes a second inspection unit (21) capable of shooting upwards, and the second inspection unit (21) is disposed on one side of the first visual inspection system (12) along the material transfer process direction.

4. The detection device according to claim 1, characterized in that, The first transfer unit includes a first robotic arm (31) disposed on one side of the first vision detection system (1), wherein the first robotic arm (31) is provided with a first suction cup (32) capable of gripping materials; The position set by the first vision detection system (1) falls within the material-grabbing movement range of the first robotic arm (31).

5. The detection device according to claim 1, characterized in that, The second transfer unit includes a second robotic arm (41) disposed on one side of the second vision detection system (2), wherein the second robotic arm (41) is provided with a second suction cup (42) capable of gripping materials; The positions set by the second vision detection system (2) and the first vision detection system (1) both fall within the material-grabbing movement range of the second robotic arm (41).

6. The detection device according to claim 2, characterized in that, The first visual inspection system (1) further includes a moving mechanism (13) that can adjust the position of the first inspection unit (12) relative to the table (11).

7. The detection device according to claim 6, characterized in that, Extend the projection along the detection direction of the first detection unit (12), define the material along the process transfer direction on the projection plane as the first direction, and the direction perpendicular to the material along the process transfer direction as the second direction; The moving mechanism (13) includes a first driving mechanism (14) that connects to the first detection unit (12) and drives the first detection unit (12) to move along the two ends of the first direction, and a second driving mechanism (15) that can drive the first driving mechanism (14) to move along the two ends of the second direction, wherein the second driving mechanism (15) is disposed above the platform (11).

8. The detection device according to claim 1, characterized in that, The detection equipment also includes a control terminal (51) and a display (52) electrically connected to the control terminal (51); the control terminal (51) is electrically connected to the first visual detection system (1), the second visual detection system (2), the first transfer unit, and the second transfer unit.

9. The detection device according to claim 1, characterized in that, The testing equipment also includes a lifting material rack (53) for placing materials.

10. A detection process for double-sided inspection of a single sheet of material, characterized in that, The testing equipment, including any one of claims 1 to 9, includes the following steps: a first robotic arm (31) grabs material onto a platform (11); a first testing unit (12) faces downwards and takes a picture of the front of the material; after the first testing unit (12) completes its testing, a second robotic arm (41) grabs the material that has been tested by the first testing unit (12) and suspends the material above the second testing unit (21), so that the back of the material faces the second testing unit (21) located below; the second testing unit (21) tests the back of the material; after the second testing unit (21) completes its testing, the second robotic arm (41) transfers the material to the next process.

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