MOS transistor detection device and method thereof

Abstract

The application provides a MOS tube detection device and method, and relates to the technical field of detection equipment. The MOS tube detection device comprises a fixing frame, a conveying device, a guide contact detection assembly, a lifting assembly, an electric detection module, a first camera, a second camera, a material separating device and a controller. The MOS tube detection method is used. After the steps of material conveying, preliminary visual detection, power-on detection, visual marking and material falling and separating, the MOS tube can be quickly and effectively detected. The detection efficiency of the MOS tube is greatly improved. The detection process does not need to be transported again, the detection time is saved, the MOS tube detection is convenient and fast, and the detection equipment is convenient for miniaturization. The MOS tube detection device and method can quickly and effectively perform power-on detection on the MOS tube, so as to improve the detection efficiency of the MOS tube.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection equipment, and in particular to a MOS tube detection device and method thereof. BACKGROUND

[0002] MOS is a transistor that carries current by the flow of holes, which can be divided into N-channel and P-channel two categories, MOSFET has three feet, generally G, D, S, by adding control signal between G, S can change the conduction and cut-off between D, S, PMOS and NMOS are completely similar in structure, the difference is the substrate and the doping type of source and drain, NMOS is on the P-type silicon substrate, by selecting doping to form N-type doped region as the source and drain region of NMOS; PMOS is on the N-type silicon substrate, by selecting doping to form P-type doped region as the source and drain region of PMOS, the distance between the two source and drain doped regions is called channel length L, and the effective source and drain size perpendicular to the channel length is called channel width W, for such a simple structure, the device source and drain are completely symmetrical, only in the application according to the flow direction of the source and drain current can the specific source and drain be finally confirmed, the MOS tube needs to test the performance of the conductive wire of the wiring end during processing and detection, and a test auxiliary test table is used in the test process.

[0003] Now there are devices for detecting MOS tubes, and the detection mechanism and MOS tube detection device with a patent number of CN208537677U, which is used for power-on detection of MOS tubes, uses a mechanical arm to clamp multiple MOS tubes at the same time, and then moves to the power-on detection contact end for conduction, so as to simultaneously power-on detect multiple MOS, which has obvious shortcomings, the whole is relatively large, which is not conducive to the reasonable placement and arrangement of the production line, and the detection mode of clamping or adsorbing, moving, and contact conduction is difficult to stably obtain and move the SMD MOS tube, and when the pin contacts and powers on, the MOS tube often falls off due to the collision between the pin of the MOS tube and the contact end, so that an additional step of fixing the MOS tube to a specific position during detection is required, which increases the power-on detection time and makes it difficult to quickly power-on detect the SMD MOS tube.

[0004] Therefore, it is necessary to provide a MOS tube detection device and method to quickly and effectively power-on detect the SMD MOS tube, so as to improve the detection efficiency of the SMD MOS tube. SUMMARY

[0005] In order to solve the above problems, the present application provides a MOS tube detection device and method to quickly and effectively power-on detect the SMD MOS tube, so as to improve the detection efficiency of the SMD MOS tube.

[0006] The application is realized by the following technical scheme:

[0007] The application provides a MOS tube detection device, which comprises a fixing frame, a conveying device, a guiding contact detection assembly, a lifting assembly, an electrical detection module, a first camera, a second camera, a material distribution device and a controller, the conveying device, the lifting assembly, the electrical detection module, the first camera, the second camera and the material distribution device are fixedly connected to the fixing frame, the guiding contact detection assembly is fixedly connected to the top of the conveying device and is arranged along the conveying direction of the conveying device, the guiding contact detection assembly is electrically connected to the electrical detection module, the first camera is located on one side of the conveying device and extends above the guiding contact detection assembly, the first camera vertically faces the guiding contact detection assembly, the lifting assembly is located on the other side of the conveying device, one end of the lifting assembly extends into the conveying device from the side and is located below the conveying belt of the conveying device and longitudinally aligns with the first camera, the material distribution device is located at the end of the conveying device and is connected to the conveying device, the shooting direction of the first camera is the boundary line, the shooting direction of the first camera to the end of the conveying device is the identification and judgment interval, the second camera is inclined to the identification and judgment interval, and the conveying device, the lifting assembly, the electrical detection module, the first camera, the second camera and the material distribution device are electrically connected to the controller.

[0008] Further, the guiding contact detection assembly comprises a guide and a contact detection part, the two sides of the guide are fixedly connected to the top of the conveying device, the bottom of the guide extends towards the conveying belt of the conveying device and is close to the upper surface of the conveying belt, the guide is provided with a material feeding observation slot, the material feeding observation slot is in communication with one end of the guide, so that the guide has a U-shaped structure, the material feeding observation slot is in communication with the upper surface of the conveying device, the contact detection part is fixedly connected to the guide and aligns with the first camera, the contact detection part is distributed on the two sides of the material feeding observation slot, one end of the lifting assembly extends into the conveying device from the side and is located below the contact detection part, and the contact detection part is electrically connected to the electrical detection module.

[0009] Further, the contact detection part comprises at least one first conductive contact component and at least one second conductive contact component. The at least one first conductive contact component is sequentially arranged and fixedly connected to one side of the material inlet viewing slot, and the at least one second conductive contact component is sequentially arranged and fixedly connected to the other side of the material inlet viewing slot. The at least one first conductive contact component and the at least one second conductive contact component are respectively electrically connected with the electric detection module. Two pin limiting plates are respectively arranged on the two side walls of the material inlet viewing slot, and the two pin limiting plates are symmetrically arranged. One end of the first conductive contact component is embedded into the bottom of one pin limiting plate, and one end of the second conductive contact component is embedded into the bottom of the other pin limiting plate. The first conductive contact component and the second conductive contact component have the same structure.

[0010] Further, the first conductive contact component comprises a metal connecting piece, a conductive contact plate and a fixed shell. The metal connecting piece is fixedly connected to the guide piece. One end of the conductive contact plate is embedded into one end of the fixed shell. One end of the metal connecting piece is fixedly connected with one end of the conductive contact plate and one end of the fixed shell and is electrically connected with the conductive contact plate. The other end of the metal connecting piece is electrically connected with the electric detection module. The other end of the fixed shell is provided with a contact step. The other end of the conductive contact plate is provided with an elastic contact end. The elastic contact end extends into the contact step. The contact step is embedded into and flush with the bottom of the pin limiting plate. One end of the elastic contact end protrudes downward out of the contact step.

[0011] Further, the bottom of the pin limiting plate is provided with a pin flow-through groove, and one end of the elastic contact end extends into the pin flow-through groove.

[0012] Further, the guide contact detection component further comprises an auxiliary alignment part. The auxiliary alignment part is fixedly connected to the upper surface of the guide piece and is aligned with the first camera. The auxiliary alignment part is located between the contact detection part and the first camera.

[0013] Further, the auxiliary alignment part comprises two first edge alignment plates, two second edge alignment plates and two color difference plates, the two first edge alignment plates are fixedly connected to the upper surface of the guide and located on one side of the material inlet viewing slot, one color difference plate is fixedly connected between the two first edge alignment plates, the two second edge alignment plates are fixedly connected to the upper surface of the guide and located on the other side of the material inlet viewing slot, the other color difference plate is fixedly connected between the two second edge alignment plates, the two first edge alignment plates correspond to the two second edge alignment plates one by one and are horizontally aligned, so that the extension lines of the two first edge alignment plates extend to the two second edge alignment plates to form a rectangular pattern in the image of the first camera, and the two color difference plates are symmetrically arranged along the material inlet viewing slot.

[0014] Further, one end of each of the two first edge alignment plates towards the material inlet viewing slot is provided with a first bevel angle, the two first bevel angles are symmetrically arranged, one end of each of the two second edge alignment plates towards the material inlet viewing slot is provided with a second bevel angle, the two second bevel angles are symmetrically arranged, the extension line of the side line of one first bevel angle is collinear with the extension line of the side line of the second bevel angle at the opposite corner, and the extension line of the side line of the other first bevel angle is collinear with the extension line of the side line of the other second bevel angle at the opposite corner.

[0015] Further, the lifting assembly comprises a fixed plate, a gas cylinder, a lifting pressing plate and a sliding cylinder, the fixed plate is fixedly connected to one side of the fixed frame, the gas cylinder is fixedly connected to the bottom of the fixed plate, the push rod of the gas cylinder penetrates through the fixed plate and is fixedly connected to one side of the lifting pressing plate, one side of the conveying device is provided with an extension slot, one end of the lifting pressing plate extends into the extension slot and is located below the conveying belt of the conveying device and is aligned with the contact detection part, the sliding cylinder is longitudinally fixedly connected with the fixed plate, the other end of the lifting pressing plate longitudinally penetrates through the sliding cylinder and is slidingly connected with the sliding cylinder, and the gas cylinder is electrically connected with the controller.

[0016] A MOS tube detection method according to the MOS tube detection device, comprising:

[0017] S1- material conveying, the external mechanical hand places the MOS tubes on the front end of the conveying device one by one, and the MOS tubes are driven to move by the conveying device under the guidance of the guide contact detection assembly;

[0018] S2- preliminary visual detection, when the MOS tube moves to the center of the image of the first camera, the conveying device stops, and the first camera performs preliminary visual detection on the MOS tube;

[0019] S3 power-on detection, if the preliminary visual detection of the MOS tube is qualified, the lifting assembly lifts the conveying belt of the conveying device by a preset height, so that the MOS tube is lifted and the pins of the MOS tube form a contact type electrical connection with the guide contact detection assembly, so that the electrical detection module detects the MOS tube;

[0020] S4 visual marking, after the power-on detection, the row of MOS tubes moves towards the end of the conveying device, after the MOS tube enters the identification judgment interval, the second camera marks the MOS tube that passes the power-on detection with a first color in the image, and marks the MOS tube that fails the power-on detection with a second color in the image;

[0021] S5 material falling and separating, the row of MOS tubes are moved out one by one from the identification judgment interval to the separating device, the controller issues corresponding separating instructions to the separating device, the separating device transports the MOS tube marked with the first color to the qualified channel, and transports the MOS tube marked with the second color to the waste channel.

[0022] The beneficial effects of the present application are:

[0023] 1. The MOS tube detection device detects the MOS tube, uses the conveying device to transport the MOS tube, and transports the MOS tube towards the guide contact detection assembly, when the MOS tube is located directly below the first camera, the first camera detects the surface of the MOS tube, the lifting assembly lifts the MOS tube through the conveying belt of the conveying device, so that the MOS tube is in contact with the guide contact detection assembly, the electrical detection module can detect the MOS tube, the second camera marks the MOS tube after the power-on detection, and the separating device separates the MOS tube that passes the power-on detection and the MOS tube that fails the power-on detection under the separating instruction of the controller, the detection process does not need to be transported again, the detection time is saved, the MOS tube is detected conveniently and quickly, and the detection equipment is small in size;

[0024] 2. The MOS tube detection method can quickly and effectively detect the MOS tube after the steps of material conveying, preliminary visual detection, power-on detection, visual marking and material falling and separating, and greatly improves the detection efficiency of the MOS tube.

[0025] In summary, the MOS tube detection device and method can quickly and effectively detect the MOS tube, and improve the detection efficiency of the MOS tube. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a whole schematic view of the MOS tube detection device.

[0027] Figure 2 For Figure 1 Partial enlarged view of label A;

[0028] Figure 3 For Figure 1 Partial enlarged view of label B;

[0029] Figure 4 Another angle view of the MOS tube detection device of the present application;

[0030] Figure 5 Partial cross-sectional view of the MOS tube detection device of the present application in the longitudinal section of the pin of the MOS tube;

[0031] Figure 6 Top view of the MOS tube detection device of the present application;

[0032] Figure 7 Cross-sectional view of the MOS tube detection device of the present application in the transverse section of the pin of the MOS tube;

[0033] Figure 8 For Figure 7 Partial enlarged view of label C;

[0034] Figure 9 Left view of the MOS tube detection device of the present application;

[0035] Figure 10 Guided contact detection assembly of the MOS tube detection device of the present application;

[0036] Figure 11 Another angle view of the guided contact detection assembly of the MOS tube detection device of the present application;

[0037] Figure 12 Image of the MOS tube detection device of the present application acquired by the first camera and virtually mapped by the first visual recognition module;

[0038] Figure 13 First conductive contact assembly of the MOS tube detection device of the present application;

[0039] Figure 14 Electrical connection of the MOS tube detection device of the present application;

[0040] Figure 15 Flow chart of the MOS tube detection method of the present application.

[0041] The reference signs are as follows:

[0042] Fixing frame 1;

[0043] Conveying device 2, conveying belt 21, extension slot 22, motor 23, outer frame 24;

[0044] Guiding contact detection assembly 3, guide 31, feeding observation slot 311, pin limiting plate 3111, first installation slot 3112, second installation slot 3113, pin flow-through slot 3114, contact detection part 32, first conductive contact assembly 321, metal connecting piece 3211, connecting end 32111, conductive contact plate 3212, elastic contact end 32121, fixed shell 3213, contact step 32131, second conductive contact assembly 322, auxiliary alignment part 33, first edge alignment plate 331, first bevel 3311, second edge alignment plate 332, second bevel 3321, color difference plate 333;

[0045] Lifting assembly 4, fixed plate 41, air cylinder 42, lifting and pressing plate 43, pressing boss 431, sliding rod 432, sliding cylinder 44:

[0046] Electric detection module 5;

[0047] First camera 6, first visual recognition module 95;

[0048] Second camera 7, second visual recognition module 96;

[0049] Material distribution device 8;

[0050] Controller 9, data processing module 91, first driving module 92, second driving module 93, third driving module 94, storage module 97;

[0051] Identification and judgment area 602, MOS tube 101, rectangular box 102, identification area box 103, qualified channel 104, unqualified channel 105. DETAILED DESCRIPTION

[0052] In order to more clearly and completely illustrate the technical scheme of the present application, the present application will be further described below with reference to the drawings.

[0053] Please refer to Figures 1-14The application provides a MOS tube detection device, which comprises a fixing frame 1, a conveying device 2, a guiding contact detection assembly 3, a lifting assembly 4, an electrical detection module 5, a first camera 6, a second camera 7, a material distribution device 8 and a controller 9. The conveying device 2, the lifting assembly 4, the electrical detection module 5, the first camera 6, the second camera 7 and the material distribution device 8 are fixedly connected to the fixing frame 1. The guiding contact detection assembly 3 is fixedly connected to the top of the conveying device 2 and is arranged along the conveying direction of the conveying device 2. The guiding contact detection assembly 3 is fixedly connected to the outer frame 24 of the conveying device 2 and is electrically connected to the electrical detection module 5. The first camera 6 is located on one side of the conveying device 2 and extends above the guiding contact detection assembly 3. The first camera 6 vertically faces the guiding contact detection assembly 3. The lifting assembly 4 is located on the other side of the conveying device 2. One end of the lifting assembly 4 extends to the inside of the conveying device 2 from the side and is located below the conveying belt 21 of the conveying device 2 and longitudinally aligns with the first camera 6. The conveying belt 21 is driven by a motor 23 through a synchronous wheel and a synchronous belt. The motor 23 is fixedly connected to the bottom of the outer frame 24. The material distribution device 8 is located at the end of the conveying device 2 and is connected to the conveying device 2. The shooting direction of the first camera 6 is the boundary line. The shooting direction of the first camera 6 to the end of the conveying device 2 is the identification and judgment interval 602. The second camera 7 is obliquely arranged towards the identification and judgment interval 602. The conveying device 2, the lifting assembly 4, the electrical detection module 5, the first camera 6, the second camera 7 and the material distribution device 8 are electrically connected to the controller 9. The controller 9 is provided with a data processing module 91, a first driving module 92, a second driving module 93, a third driving module 94 and a storage module 97. The first camera 6 is provided with a first visual identification module 95. The second camera 7 is provided with a second visual identification module 96. The data processing module 91 is electrically connected to the first driving module 92, the second driving module 93, the third driving module 94, the first visual identification module 95, the second visual identification module 96 and the storage module 97. The data processing module 91 is used for issuing corresponding operation instructions to the first driving module 92, the second driving module 93 and the third driving module 94, so that the first driving module 92, the second driving module 93 and the third driving module 94 respectively issue corresponding operation instructions to the conveying device 2, the lifting assembly 4 and the material distribution device 8. Meanwhile, the data processing module 91 receives the detection signals returned by the electrical detection module 5 and the image signals returned by the first visual identification module 95 and the second visual identification module 96, so as to judge whether the detected MOS tube is qualified or unqualified. The data processing module 91 can also call the image information in the storage module 97. The first driving module 92 is electrically connected to the conveying device 2 and is used for issuing corresponding operation instructions to the conveying device 2, so that the conveying device 2 operates. The second driving module 93 is electrically connected to the lifting assembly 4 and is used for issuing corresponding operation instructions to the lifting assembly 4, so that the lifting assembly 4 operates.The third driving module 94 is electrically connected with the distributing device 8. The third driving module 94 is used for issuing corresponding operation instructions to the distributing device 8, so that the distributing device 8 operates. The first visual identification module 95 is electrically connected with the first camera 6. The first visual identification module 95 is used for acquiring image signals from the first camera 6 and returning to the data processing module 91. The second visual identification module 96 is electrically connected with the second camera 7. The second visual identification module 96 is used for acquiring image signals from the second camera 7 and returning to the data processing module 91. The storage module 97 is used for storing the image information returned by the first visual identification module 95 and the second visual identification module 96 within a preset time, so that the data processing module 91 can call the image information in the storage module 97 within the preset time.

[0054] In the embodiment, when the patch type MOS tube 101 is detected, the MOS tube 101 is moved to the feeding end of the conveying device 2 by the external mechanical arm, the conveying device 2 conveys the MOS tube to convey the MOS tube 101 to the direction of the guiding contact detection assembly 3, at this time, the MOS tube 101 moves in the guiding contact detection assembly 3, the first camera 6 can capture the moving process of the MOS tube 101, when the MOS tube 101 is directly below the first camera 6, the conveying device 2 is paused, at this time, the MOS tube is directly below the first camera 6, the first camera 6 visually detects the surface of the MOS tube, after the visual detection of the MOS tube is passed, the lifting assembly 4 lifts the MOS tube through the conveying belt 21 of the conveying device 2, so that the MOS tube is in contact with the guiding contact detection assembly 3, at this time, the pin of the MOS tube, the contact detection assembly 3 and the electrical detection module 5 form a circuit for electrical detection, so that the electrical detection module 5 can conduct electrical detection on the MOS tube, after the electrical detection of the MOS tube is completed, the conveying device 2 is started, the MOS tube will continue to move to the rear of the conveying device 2, that is, to the direction of the identification and judgment interval 602, when the conveying device 2 is started, the second camera 7 distinguishes and marks the MOS tube after the electrical detection, that is, the MOS tubes that pass or fail the electrical detection are distinguished and marked, all the MOS tubes in the identification and judgment interval 602 in the image of the second camera 7 are marked and distinguished by corresponding color marks, that is, a row of MOS tubes with color marks is formed, which is convenient for the inspectors to watch on the external synchronous display screen, and the distribution device 8 distributes the MOS tubes that pass and fail the electrical detection according to the distribution instructions issued by the controller 9, the distribution device 8 is a small conveying belt, when the qualified MOS tube falls on the distribution device 8, the distribution device 8 rotates forward, so that the MOS tube is moved and falls into the left qualified channel 104, when the unqualified MOS tube falls on the distribution device 8, the distribution device 8 reverses, so that the MOS tube is moved and falls into the right unqualified channel 105, so as to quickly distribute the MOS tubes; if the visual detection of the surface of the MOS tube by the first camera 6 fails, for example, the surface of the MOS tube is damaged or has no model information, the lifting assembly 4 does not lift and does not conduct electrical detection, the conveying device 2 conveys it to the rear, the second camera 7 also marks the MOS tube as unqualified, when the MOS tube falls on the distribution device 8, the distribution device 8 reverses, so that the MOS tube is moved and falls into the right unqualified channel, and the whole process of detecting the patch type MOS tube does not need to be moved again, which saves detection time, makes the detection of the patch type MOS tube convenient and fast, and facilitates the miniaturization of the detection equipment.

[0055] In the embodiment, the guiding contact detection assembly 3 comprises a guide 31 and a contact detection part 32. The guide 31 is an insulating plastic part. The guide 31 is fixedly connected to the top of the conveying device 2 at both sides. The guide 31 can be replaced. The bottom of the guide 31 extends towards the conveying belt 21 of the conveying device 2 and is close to the upper surface of the conveying belt 21, that is, the bottom of the guide 31 is very close to the conveying belt 21, maintaining a distance of 0.2-0.4 mm. The guide 31 is provided with an inlet viewing slot 311. The inlet viewing slot 311 is in communication with one end of the guide 31, so that the guide 31 has a U-shaped structure. The inlet viewing slot 311 is in communication with the upper surface of the conveying device 2. The inlet viewing slot 311 can be designed according to the horizontal width of the pins of the patch-type MOS tube 101. When the MOS tube 101 is moved by the conveying device 2, the pins on both sides of the MOS tube 101 will slide in contact with the two side surfaces of the inlet viewing slot 311, that is, when different models of MOS tubes are detected, different widths of the inlet viewing slot 311 corresponding to the guide 31 can be installed on the conveying device 2. The contact detection part 32 is fixedly connected to the guide 31 and aligned with the first camera 6. The contact detection part 32 is distributed on both sides of the inlet viewing slot 311. One end of the lifting assembly 4 extends to the inside of the conveying device 2 from the side and is located below the contact detection part 32. The contact detection part 32 is electrically connected to the electrical detection module 5. When the MOS tube 101 is moved below the contact detection part 32, the conveying device 2 is paused, and then one end of the lifting assembly 4 is lifted to lift the MOS tube through the conveying belt 21. The height to which the MOS tube is lifted is 1.0-1.5 mm, so that all the pins of the MOS tube are in contact with the contact detection part 32 to form an electrical connection. At this time, the MOS tube, the contact detection part 32 and the electrical detection module 5 form a circuit for power-on detection to perform power-on detection. The electrical detection module 5 transmits a detection signal back to the controller 9. The controller 9 sends a corresponding marking instruction to the second visual recognition module 96 according to the detected result. The second visual recognition module 96 marks the MOS tube through the image returned by the second camera 7. For example, if the MOS tube is a qualified product in the power-on detection, the outline of the MOS tube in the image returned by the second camera 7 is marked as a green outline. If the MOS tube is a unqualified product in the power-on detection, the outline of the MOS tube in the image returned by the second camera 7 is marked as a red outline. After the power-on detection is completed, one end of the lifting assembly 4 is lowered, the conveying belt 21 returns to be flat, and all the pins of the MOS tube are separated from the contact detection part 32. Then the conveying device 2 is started to continue to transport the MOS tube after the power-on detection to the rear.

[0056] In the embodiment, the contact detection part 32 comprises at least one first conductive contact component 321 and at least one second conductive contact component 322. The at least one first conductive contact component 321 is sequentially arranged and fixedly connected to one side of the material inlet viewing slot 311, and the at least one second conductive contact component 322 is sequentially arranged and fixedly connected to the other side of the material inlet viewing slot 311. The at least one first conductive contact component 321 and the at least one second conductive contact component 322 are respectively electrically connected with the electrical detection module 5. The two side walls of the material inlet viewing slot 311 are respectively provided with two pin limiting plates 3111. The two pin limiting plates 3111 are symmetrically arranged and are used to limit the positions of the pins on both sides of the MOS tube 101. When the MOS tube is moved under the driving of the conveying device 2, the pins of the MOS tube will not be separated from the conveying belt 21, so that the MOS tube moves in a horizontal state. One end of the first conductive contact component 321 is embedded into the bottom of one pin limiting plate 3111, and one end of the second conductive contact component 322 is embedded into the bottom of the other pin limiting plate 3111. The first conductive contact component 321 and the second conductive contact component 322 have the same structure. When the MOS tube moves, the pin limiting plates 3111 limit the positions of the pins of the MOS tube. When the MOS tube moves to below the contact detection part 32, the pins on one side of the MOS tube are below the first conductive contact component 321, and the pins on the other side of the MOS tube are below the second conductive contact component 322. When one end of the lifting assembly 4 is lifted, the pins on one side of the MOS tube are in contact with the first conductive contact component 321 to form an electrical connection, and the pins on the other side of the MOS tube are in contact with the second conductive contact component 322 to form an electrical connection. At this time, the MOS tube, the first conductive contact component 321, the second conductive contact component 322 and the electrical detection module 5 form a power-on detection circuit. The number of the first conductive contact component 321 and the second conductive contact component 322 is determined according to the number and distribution positions of the pins of the MOS tube. For example, the MOS tube has three pins, two on one side and one on the other side. At this time, the number of the first conductive contact component 321 is one, and the number of the second conductive contact component 322 is two.

[0057] In the embodiment, the guide 31 is internally provided with the same number of first installation grooves 3112 as the first conductive contact assemblies 321 and the same number of second installation grooves 3113 as the second conductive contact assemblies 322. The first installation grooves 3112 are located on one side of the material inlet viewing groove 3111, one end of the first installation grooves 3112 extends to the bottom of one pin limiting plate 3111, the first conductive contact assemblies 321 are accommodated in the first installation grooves 3112, the second installation grooves 3113 are located on the other side of the material inlet viewing groove 311, one end of the second installation grooves 3113 extends to the bottom of the other pin limiting plate 3111, and the second conductive contact assemblies 322 are accommodated in the second installation grooves 3113. The first installation grooves 3112 and the second installation grooves 3113 have the same structure. In order to ensure that the bottom of the first conductive contact assembly 321 or the second conductive contact assembly 322 can be located at the bottom of the pin limiting plate 3111 after installation, it is convenient to contact the surface of the pin of the MOS tube, therefore, one end of the first installation grooves 3112 or the second installation grooves 3113 needs to extend to the bottom of the pin limiting plate 3111 when designed, so that the first conductive contact assembly 321 or the second conductive contact assembly 322 will not hinder the movement of the MOS tube 101 after installation.

[0058] In the embodiment, the first conductive contact assembly 321 comprises a metal connecting piece 3211, a conductive contact plate 3212 and a fixed shell 3213, all of which are made of metal material. The metal connecting piece 3211 is fixedly connected in the guide piece 31. The conductive contact plate 3212 is embedded in one end of the fixed shell 3213. One end of the metal connecting piece 3211 is fixedly connected with one end of the conductive contact plate 3212 and one end of the fixed shell 3213 and is electrically connected with the conductive contact plate 3212. The other end of the metal connecting piece 3211 is provided with a connecting end 32111. The metal connecting piece 3211 is welded on the connecting end 32111 by a conductive wire to be electrically connected with the electrical detection module 5. The other end of the fixed shell 3213 is provided with a contact step 32131. The other end of the conductive contact plate 3212 is provided with an elastic contact end 32121. The elastic contact end 32121 extends into the contact step 32131. The contact step 32131 is embedded in and flush with the bottom of the pin limiting plate 3111. One end of the elastic contact end 32121 protrudes downward out of the contact step 32131. Since the first installation slot 3112 has a Z-shaped structure, in order to facilitate the installation of the first conductive contact assembly 321 and at the same time make the pin of the MOS tube have elastic force when it is in contact with the first conductive contact assembly 321, the first conductive contact assembly 321 is divided into three parts, i.e. the metal connecting piece 3211, the conductive contact plate 3212 and the fixed shell 3213. When the first conductive contact assembly 321 is installed, the metal connecting piece 3211 is first inserted into the first installation slot 3112 from one end of the first installation slot 3112. Then the conductive contact plate 3212 is embedded in the fixed shell 3213, and the conductive contact plate 3212 is taken as the contact surface of the metal connecting piece 3211 to be inserted into the first installation slot 3112 from the other end of the first installation slot 3112, so that the conductive contact plate 3212 is in contact with the metal connecting piece 3211. Then screws are sequentially passed through the fixed shell 3213, the conductive contact plate 3212 and locked in the metal connecting piece 3211. After the screws are tightened, the first conductive contact assembly 321 is stably fixed in the first installation slot 3112. Since the contact step 32131 is flush with the bottom of the pin limiting plate 3111, it will not hinder the normal movement of the MOS tube along the slot wall of the material viewing slot 311. The elastic contact end 32121 has elasticity, and one end of the elastic contact end 32121 protrudes downward out of the contact step 32131. When the MOS tube is lifted, the pin of the MOS tube will abut against the elastic contact end 32121, so that the stable contact type electrical connection between the MOS tube and the first conductive contact assembly 321 can be ensured. The operation of installing the second conductive contact assembly 322 in the second installation slot 3113 is the same as that of installing the first conductive contact assembly 321 in the first installation slot 3112, and will not be described here.

[0059] In the embodiment, the lower part of the pin limiting plate 3111 is provided with a pin flow-through groove 3114, and one end of the elastic contact end 32121 extends into the pin flow-through groove 3114; when the MOS tube moves, the pin of the MOS tube moves in the pin flow-through groove 3114, and in the moving process, the pin of the MOS tube does not contact the first conductive contact assembly 321 or the second conductive contact assembly 322.

[0060] In the embodiment, the guiding contact detection assembly 3 further comprises an auxiliary alignment part 33, which is fixedly connected to the upper surface of the guide 31 and aligned with the first camera 6, and is located between the contact detection part 32 and the first camera 6; since the installation position of the first camera 6 may deviate, it is difficult to ensure that it is completely installed in the position centered above the contact detection part 32, that is, it is difficult to ensure that the contact detection part 32 is located in the central position of the image obtained by the first camera 6, so the auxiliary alignment part 33 is provided to align the virtual composition of the image, and the role of the auxiliary alignment part 33 is to assist the second visual recognition module 96 to virtually compose the image after the first camera 6 obtains the image below, so that the auxiliary alignment part 33 in the image is a rectangular frame 102 with a color boundary, the area of the rectangular frame 102 is greater than the upper surface area of the MOS tube 101, and when the MOS tube 101 moves to the center of the rectangular frame 102, the conveying device 2 is paused, and at this time, the MOS tube 101 can be subjected to the above-mentioned power-on detection.

[0061] In the embodiment, the auxiliary alignment part 33 comprises two first alignment plates 331, two second alignment plates 332 and two color difference plates 333. The two first alignment plates 331 are fixedly connected to the upper surface of the guide 31 and located at one side of the material inlet viewing slot 311. One color difference plate 333 is fixedly connected between the two first alignment plates 331. The two second alignment plates 332 are fixedly connected to the upper surface of the guide 31 and located at the other side of the material inlet viewing slot 311. The other color difference plate 333 is fixedly connected between the two second alignment plates 332. The two first alignment plates 331 correspond to the two second alignment plates 332 one by one and are horizontally aligned, so that the extension lines of the two first alignment plates 331 extend to the two second alignment plates 332 to form a rectangular pattern in the image of the first camera 6, and the two color difference plates 333 are symmetrically arranged along the material inlet viewing slot 311. When the first visual recognition module 95 virtually composes the image, due to the light color difference, the edge connecting lines of the two first alignment plates 331 and the two second alignment plates 332 form a rectangular frame 102, and the colors of the two color difference plates 333 are different from the color of the MOS tube surface. Preferably, the colors are greatly different. For example, the MOS tube surface is black, i.e., dark color, and the color difference plate 333 is light color, i.e., white, light red, light blue or light green. When the MOS tube moves to the area within the rectangular frame 102, the first camera 6 can quickly and clearly capture the overhead view profile of the MOS tube 101 due to the large color difference, so as to facilitate subsequent recognition and alignment.

[0062] In the embodiment, two first edge alignment plates 331 are provided with first bevel angles 3311 towards one end of the material inlet viewing slot 311, the two first bevel angles 3311 are symmetrically arranged, two second edge alignment plates 332 are provided with second bevel angles 3321 towards one end of the material inlet viewing slot 311, the two second bevel angles 3321 are symmetrically arranged, the extension line of the side line of one first bevel angle 3311 is collinear with the extension line of the side line of one second bevel angle 3321 at the opposite corner, and the extension line of the side line of the other first bevel angle 3311 is collinear with the extension line of the side line of the other second bevel angle 3321 at the opposite corner; in order to ensure that the MOS tube 101 can accurately stay in the middle of the rectangular frame 102 when moving, that is, the midpoint of the MOS tube coincides with the midpoint of the rectangular frame 102, the first bevel angle 3311 and the second bevel angle 3321 are arranged to assist the first visual recognition module 95 in virtually mapping the image. When virtually mapping, the two color difference plates 333 are separated by the material inlet viewing slot 311, at this time, the material inlet viewing slot 311 in the rectangular frame 102 also serves as another rectangular frame with a smaller area and in the middle, that is, the recognition area frame 103, the endpoints of the two first bevel angles 3311 are on two corners of the recognition area frame 103, and the endpoints of the two second bevel angles 3321 are on the other two corners of the recognition area frame 103, at this time, the first visual recognition module 95 can take the side line of one first bevel angle 3311 as the starting point of virtual mapping and connect to the side line of one second bevel angle 3321 at the opposite corner to form one diagonal line, and take the side line of the other first bevel angle 3311 as the starting point of virtual mapping and connect to the side line of the other second bevel angle 3321 at the opposite corner to form the other diagonal line, so that the recognition area frame 103 has two intersecting diagonal lines, which determine the first midpoint of alignment, when the MOS tube 101 enters the range of the recognition area frame 103, the top view of the MOS tube 101 is a rectangular structure, the first visual recognition module 95 performs diagonal line mapping on the top view of the MOS tube 101, so that the MOS tube 101 also has a second midpoint, the diameter size of the circular mark of the first midpoint is slightly larger than that of the second midpoint, at this time, the second midpoint and the first midpoint are in a substantially collinear state, since the speed of the conveying device 2 is known, that is, the speed of the MOS tube is known, the distance between the first midpoint and the second midpoint can be obtained from the image, that is, the displacement time of the second midpoint to the first midpoint can be calculated, after the conveying device 2 runs for the displacement time, the second midpoint reaches the first midpoint, at this time, the MOS tube is located in the center of the recognition area frame 103.

[0063] In the embodiment, the lifting assembly 4 comprises a fixed plate 41, a cylinder 42, a lifting pressing plate 43, a sliding cylinder 44, the fixed plate 41 is fixedly connected to one side of the fixed frame 1, the cylinder 42 is fixedly connected to the bottom of the fixed plate 41, the gas supply end of the cylinder 42 is in pressure connection with an external gas supply device, the push rod of the cylinder 42 penetrates through the fixed plate 41 and is fixedly connected to one side of the lifting pressing plate 43, one side of the conveying device 2 is provided with an extension slot 22, one end of the lifting pressing plate 43 extends into the extension slot 22 and is located below the conveying belt 21 of the conveying device 2 and is aligned with the contact detection part 32, the sliding cylinder 44 is fixedly connected to the fixed plate 41 in the longitudinal direction, the other end of the lifting pressing plate 43 penetrates through the sliding cylinder 44 in the longitudinal direction and is slidingly connected to the sliding cylinder 44, and the cylinder 42 is electrically connected to the controller 9; after the MOS tube is aligned with the contact detection part 32, the cylinder 42 drives the lifting pressing plate 43 to move upward, one end of the lifting pressing plate 43 is provided with a pressing boss 431, the area of the pressing boss 431 is greater than the area of the MOS tube, so as to cover all the pins of the MOS tube in the pressing process, and the pressing boss 431 can be replaced to adapt to different models of MOS tubes for lifting, the other end of the lifting pressing plate 43 is provided with a sliding rod 432, the sliding rod 432 penetrates through the sliding cylinder 44 and is slidingly connected to the sliding cylinder 44, the cylinder 42 is located between the pressing boss 431 and the sliding cylinder 44, in order to ensure that the pressing boss 431 presses the conveying belt 21 in parallel in the lifting process, the sliding rod 432 is slidingly connected to the sliding cylinder 44, so as to balance the stress and avoid that the lifting pressing plate 43 inclines in the lifting process, and prevent that the pins of the MOS tube are not pressed sufficiently by the pressing boss 431, so as to cause insufficient power-on detection.

[0064] Please refer to Figures 14-15 A MOS tube detection method according to the MOS tube detection device, comprising:

[0065] S1-material conveying, an external mechanical hand places the MOS tubes on the front end of the conveying device 2 one by one, and the MOS tubes are driven by the conveying device 2 to move under the guidance of the guiding and contact detection assembly 3;

[0066] S2-primary visual detection, when the MOS tube moves to the image center of the first camera 6, the conveying device 2 stops, and the first camera 6 performs primary visual detection on the MOS tube;

[0067] S3-power-on detection, if the primary visual detection of the MOS tube is qualified, the lifting assembly 4 lifts the conveying belt 21 of the conveying device 2 upward by a preset height, so that the MOS tube is lifted and the pins of the MOS tube are in contact type electrical connection with the guiding and contact detection assembly 3, so that the electrical detection module 5 performs power-on detection on the MOS tube;

[0068] S4 visual marking, after power-on detection, the row of MOS tubes moves towards the end of the conveying device 2, after the MOS tube enters the recognition judgment interval, the second camera 7 marks the power-on detection qualified MOS tube in the image with a first color and marks the power-on detection unqualified MOS tube in the image with a second color;

[0069] S5 blanking and distributing, the row of MOS tubes is moved out from the recognition judgment interval to the distributing device 8 one by one, the controller 9 issues corresponding distribution instructions to the distributing device 8, the distributing device 8 transports the MOS tube marked with the first color to the qualified channel and transports the MOS tube marked with the second color to the waste channel.

[0070] In the embodiment, when the MOS tube is detected, the external mechanical hand places the MOS tube on the front end of the conveying device 2 one by one, and the MOS tube is moved by the conveying device 2 under the guidance of the guiding and contact detection assembly 3, that is, the MOS tube is still in a moving state and moves towards the end of the conveying device 2; the first camera 6 is turned on, and under the action of the auxiliary alignment part 33, the first visual recognition module 95 forms a rectangular box 102, an identification area box 103 and a first midpoint in the image; after the MOS tube moves into the area of the rectangular box 102, the first visual recognition module 95 performs diagonal composition on the top view of the MOS tube 101 to form a second midpoint; when the MOS tube moves to the center of the image of the first camera 6, that is, when the second midpoint reaches the first midpoint, the conveying device 2 stops, and the first camera 6 performs preliminary visual detection on the MOS tube to detect whether the shape of the MOS tube is defective; if the preliminary visual detection of the MOS tube is qualified, the controller 9 issues a lifting instruction to the lifting assembly 4, the lifting assembly 4 lifts the conveying belt 21 of the conveying device 2 upward by a preset height, so that the MOS tube is lifted and the pins of the MOS tube form a contact type electrical connection with the guiding and contact detection assembly 3, so that the electrical detection module 5 performs power-on detection on the MOS tube; after the power-on detection, the row of MOS tubes moves towards the end of the conveying device 2, that is, moves into the identification and judgment interval 602; after the MOS tube enters the identification and judgment interval 602, the second visual recognition module 96 performs first color marking on the MOS tube that passes the power-on detection and second color marking on the MOS tube that fails the power-on detection in the image obtained by the second camera 7, for example, marking the overall contour of the qualified MOS tube as a green contour and marking the overall contour of the unqualified MOS tube as a red contour; the row of MOS tubes are moved out of the identification and judgment interval 602 to the material distribution device 8 one by one under the driving of the conveying device 2, the image of this process is captured by the second camera 7, then the second visual recognition module 96 returns the image information to the data processing module 91 of the controller 9, after the data processing module 91 judges the image information, the third driving module 94 of the controller 9 issues a corresponding material distribution instruction to the material distribution device 8, and the material distribution device 8 transports the MOS tube marked with the first color marking to the qualified channel and transports the MOS tube marked with the second color marking to the waste channel, for example, if the MOS tube falling into the material distribution device 8 is a green contour in the image, the third driving module 94 issues a forward transmission instruction to the material distribution device 8, the material distribution device 8 rotates forward, so that the MOS tube with a green contour is moved and falls into the left qualified channel, and if the next MOS tube falling into the material distribution device 8 is a red contour in the image, the third driving module 94 issues a reverse transmission instruction to the material distribution device 8, the material distribution device 8 rotates reversely, so that the MOS tube with a red contour is moved and falls into the right unqualified channel, so as to quickly distribute the MOS tubes.If the preliminary visual inspection of the MOS tube is not qualified, the controller 9 does not issue any instruction to the lifting assembly 4, the lifting assembly 4 is not in action, the conveying device 2 is started, and at the same time, the unqualified MOS tube is directly marked with a second color mark. For example, if the surface of the MOS tube is damaged, after the MOS tube is centered in the identification area frame 103, the overhead view of the MOS tube is acquired by the first camera 6, and after the first visual identification module 95 returns the image to the data processing module 91 in the controller 9 for judgment, it is found that the overhead view profile of the MOS tube has damage, the data processing module 91 directly issues a start instruction to the first driving module 92, the first driving module 92 issues a running instruction to the conveying device 2, and the conveying device 2 continues to start to drive the MOS tube to continue to move backward. At this time, the unqualified MOS tube is marked with a second color mark, for example, a red profile.

[0071] In summary, the MOS tube detection device and method can quickly and effectively perform power-on detection on the MOS tube, thereby improving the detection efficiency of the MOS tube.

[0072] Of course, the present application can have other various embodiments, and based on the embodiments, other embodiments obtained by those skilled in the art without any creative labor fall within the scope of the present application.

Claims

1. A MOSFET detection device, characterized in that, The system includes a fixed frame, a conveying device, a guide contact detection component, a lifting component, an electrical detection module, a first camera, a second camera, a material distribution device, and a controller. The conveying device, the lifting component, the electrical detection module, the first camera, the second camera, and the material distribution device are all fixedly connected to the fixed frame. The guide contact detection component is fixedly connected to the top of the conveying device and is positioned along the conveying direction of the conveying device. The guide contact detection component is electrically connected to the electrical detection module. The first camera is located on one side of the conveying device and extends above the guide contact detection component, perpendicularly facing the guide contact detection component. The lifting component is located on the other side of the conveying device, with one end extending from the side into the interior of the conveying device and located below the conveyor belt, longitudinally aligned with the first camera. The material distribution device is located at the end of the conveying device and connects to it. The area from the shooting direction of the first camera to the end of the conveying device is the identification and judgment area. The second camera is tilted towards the identification and judgment area. The conveying device, the lifting assembly, the electrical inspection module, the first camera, the second camera, and the material distribution device are all electrically connected to the controller. The guide contact detection assembly includes a guide member and a contact detection part. The two sides of the guide member are fixedly connected to the top of the conveying device, and the bottom of the guide member extends towards the conveyor belt of the conveying device and is close to the upper surface of the conveyor belt. The guide member has an inlet viewing groove, which is connected to one end of the guide member, making the guide member U-shaped. The inlet viewing groove is connected to the upper surface of the conveying device. The contact detection part is fixedly connected to the guide member and aligned with the first camera. The contact detection part is distributed on both sides of the inlet viewing groove. One end of the lifting assembly extends from the side into the interior of the conveying device and is located below the contact detection part. The contact detection part is electrically connected to the electrical inspection module. The guide contact detection assembly also includes an auxiliary alignment part, which is fixedly connected to the upper surface of the guide member and aligned with the first camera. The auxiliary alignment part is located between the contact detection part and the first camera.The auxiliary alignment part includes two first flush-edge plates, two second flush-edge plates, and two color difference plates. The two first flush-edge plates are fixedly connected to the upper surface of the guide member and located on one side of the infeed viewing slot. One color difference plate is fixedly connected between the two first flush-edge plates. The two second flush-edge plates are fixedly connected to the upper surface of the guide member and located on the other side of the infeed viewing slot. The other color difference plate is fixedly connected between the two second flush-edge plates. The two first flush-edge plates correspond one-to-one with the two second flush-edge plates and are horizontally aligned, such that the extension lines of the two first flush-edge plates extend to the two... After the second edge-aligning plate is applied, a rectangular pattern is formed in the image of the first camera. The two color difference plates are symmetrically arranged along the feed viewing slot. Each of the two first edge-aligning plates has a first bevel angle at one end facing the feed viewing slot, and the two first bevel angles are symmetrically arranged. Similarly, each of the two second edge-aligning plates has a second bevel angle at one end facing the feed viewing slot, and the two second bevel angles are symmetrically arranged. The extension of the side line of one first bevel angle is collinear with the extension of the side line of one diagonally opposite second bevel angle, and the extension of the side line of the other first bevel angle is collinear with the extension of the side line of the other diagonally opposite second bevel angle.

2. The MOS transistor detection device according to claim 1, characterized in that, The contact detection unit includes at least one first conductive contact component and at least one second conductive contact component. The at least one first conductive contact component is arranged sequentially and fixedly connected to one side of the feed observation tank, and the at least one second conductive contact component is arranged sequentially and fixedly connected to the other side of the feed observation tank. The at least one first conductive contact component and the at least one second conductive contact component are electrically connected to the electrical detection module. Two pin limiting plates are provided on each of the two side walls of the feed observation tank. The two pin limiting plates are symmetrically arranged. One end of the first conductive contact component is embedded in the bottom of one pin limiting plate, and one end of the second conductive contact component is embedded in the bottom of the other pin limiting plate. The first conductive contact component and the second conductive contact component have the same structure.

3. The MOS transistor detection device according to claim 2, characterized in that, The first conductive contact assembly includes a metal connector, a conductive contact plate, and a fixing shell. The metal connector is fixedly connected to the guide member. The conductive contact plate is embedded in one end of the fixing shell. One end of the metal connector is fixedly connected to one end of the conductive contact plate and one end of the fixing shell, and is electrically connected to the conductive contact plate. The other end of the metal connector is electrically connected to the electrical detection module. The other end of the fixing shell is provided with a contact step. The other end of the conductive contact plate is provided with an elastic contact end. The elastic contact end extends into the contact step. The contact step is embedded in the bottom of the pin limiting plate and is flush with the bottom of the pin limiting plate. One end of the elastic contact end protrudes downward from the contact step.

4. The MOS transistor detection device according to claim 3, characterized in that, The pin limiting plate is provided with a pin flow groove below it, and one end of the elastic contact end extends into the pin flow groove.

5. The MOS transistor detection device according to claim 1, characterized in that, The lifting assembly includes a fixed plate, a cylinder, a lifting pressing plate, and a sliding cylinder. The fixed plate is fixedly connected to one side of the fixed frame, and the cylinder is fixedly connected to the bottom of the fixed plate. The push rod of the cylinder passes through the fixed plate and is fixedly connected to one side of the lifting pressing plate. One side of the conveying device is provided with an insertion groove. One end of the lifting pressing plate extends into the insertion groove and is located below the conveyor belt of the conveying device and aligned with the contact detection part. The sliding cylinder is longitudinally fixedly connected to the fixed plate, and the other end of the lifting pressing plate longitudinally passes through the sliding cylinder and is slidably connected to the sliding cylinder. The cylinder is electrically connected to the controller.

6. A method for detecting a MOSFET, comprising the MOSFET detection apparatus according to any one of claims 1-5, characterized in that, include: S1 - Material conveying: An external robotic arm places the MOS transistors one by one on the front end of the conveying device. The MOS transistors are moved by the conveying device under the guidance of the guide contact detection component. S2 - Preliminary visual inspection: When the MOS transistor moves to the center of the image of the first camera, the conveying device stops, and the first camera performs preliminary visual inspection on the MOS transistor. S3 - Power-on detection: If the initial visual inspection of the MOS transistor is qualified, the lifting component will lift the conveyor belt of the conveyor device to a preset height, so that the MOS transistor is lifted and the pins of the MOS transistor form a contact electrical connection with the guide contact detection component, so that the electrical detection module can perform power-on detection on the MOS transistor. S4 - Visual Marking: After power-on detection, a row of MOS transistors moves toward the end of the conveying device. After the MOS transistors enter the recognition and judgment area, the second camera marks the MOS transistors that pass the power-on detection with the first color in the image and marks the MOS transistors that fail the power-on detection with the second color in the image. S5 - Material feeding and sorting: A row of MOS transistors is moved out one by one from the identification and judgment area into the sorting device. The controller then issues the corresponding sorting command to the sorting device. The sorting device then transports the MOS transistors marked with the first color mark to the qualified channel and the MOS transistors marked with the second color mark to the scrap channel.

Images