Automobile electronic component AOI detection device and method thereof

Abstract

The invention belongs to the technical field of electronic component AOI detection, and particularly relates to an automobile electronic component AOI detection device and method. Comprising a box; the conveying belt is matched with the box body; the AOI camera shooting unit is located in the box body, and the AOI camera shooting unit is used for detecting the electronic component; the X-ray camera shooting unit is used for detecting the shielded part of the electronic component; the fixing unit is used for fixing the electronic element and is matched with the conveying belt; the processor is fixedly connected with the box body, and the conveying belt, the AOI camera shooting unit and the X-ray camera shooting unit are all electrically connected with the processor; an energizing unit; the judging unit is used for judging whether the electronic component is heated abnormally or not; the AOI camera shooting unit, the electrifying unit, the judging unit and the X-ray camera shooting unit are connected in sequence. According to the scheme, the problem of low detection efficiency caused by low detection speed of the X-ray detection device is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of AOI detection of electronic components, and specifically relates to an AOI detection device and method for automotive electronic components. Background Art

[0002] With the trend of automobile electrification, intelligence and networking, the application scope of automotive electronic components continues to expand. From engine management systems to autonomous driving assistance systems to in-vehicle entertainment information systems, the quality of electronic components is directly related to the safety and reliability of vehicles. Therefore, efficient detection methods are essential to ensure the quality of these components. Automated Optical Inspection (AOI) of automotive electronic components is one of the key steps to ensure the quality of these components, especially when modern cars are increasingly dependent on complex electronic systems.

[0003] At present, a multifunctional chip AOI detection and processing equipment with announcement number CN117380573A on the market includes a lower platform, a detection and conveying device and an NG double unloading device are arranged on the top of the lower platform, a loading device is arranged at one end of the detection and conveying device, a double-sided AOI detection device, an X-ray detection device and two NG screening and picking devices are arranged above the detection and conveying device, and an upper NG tray device is arranged above the NG double unloading device. The multifunctional chip AOI detection and processing equipment, through the arrangement of the loading device, the detection and conveying device and the upper NG tray device, can realize the automatic loading and unloading of chips, the transmission between monitoring stations and the automatic loading of NG trays, effectively improving its work efficiency. At the same time, the equipment as a whole realizes the loading and unloading, classification and detection and screening processes of qualified chips and NG chips, greatly improving the detection efficiency of chips, and integrating AOI detection and X-ray detection.

[0004] This solution first uses AOI to detect whether the components are correct and whether the surface solder joints are properly soldered, and then uses an X-ray inspection device to detect whether the solder joints hidden under the components are correct. This method can fully inspect electronic components and reduce the misjudgment rate. However, there is also a problem: the X-ray inspection device has a very slow inspection speed and takes a long time, resulting in low inspection efficiency. Summary of the invention

[0005] The present invention provides an AOI inspection device for automotive electronic components, which is used to solve the problem that the inspection speed of an X-ray inspection device is very slow, resulting in low inspection efficiency.

[0006] The present invention provides an AOI detection device for automotive electronic components, comprising a box body: the box body is provided with a control panel; a conveyor belt: the conveyor belt cooperates with the box body, and the conveyor belt is used to transport electronic components; an AOI camera unit: the AOI camera unit is located inside the box body, and the AOI camera unit is used to detect electronic components; an X-ray camera unit: the X-ray camera unit is used to detect the shielded part of the electronic component; a fixing unit: the fixing unit is used to fix the electronic component, and the fixing unit cooperates with the conveyor belt; a processor: the processor is fixedly connected to the box body, and the conveyor belt, the AOI camera unit and the X-ray camera unit are all electrically connected to the processor; a power-on unit: the power-on detection unit is used to power on the electronic component; a judgment unit: the judgment unit is used to judge whether the electronic component is abnormally heated; the AOI camera unit, the power-on unit, the judgment unit and the X-ray camera unit are connected in sequence.

[0007] The principle of this solution is that the operator fixes the electronic component on the fixing mechanism, and then fixes the fixing mechanism on the conveyor belt. The operator starts the conveyor belt, the electronic component enters the AOI camera unit area, the conveyor belt stops running, and the AOI camera unit performs a round of inspection. If it is qualified, it enters the next round of inspection. If it is unqualified, it is marked and then directly transported out through the conveyor belt.

[0008] After a round of inspection, qualified products stop at the power-on unit under the transportation of the conveyor belt. The power-on unit is energized and the judgment unit determines whether the heating is normal. If the heating is abnormal, it is sent to the X-ray camera unit for inspection to determine whether the hidden solder joints are abnormal. If the solder joints are abnormal, they are marked, and if they are normal, they are qualified products.

[0009] The beneficial effect of this solution is that: this solution performs a power-on test through a power-on unit, and then uses a judgment unit to determine whether there is abnormal heating. After excluding surface components and solder joints, if the power is still on and the heating is normal, then there is a high probability that the hidden solder joints are normal, and there is no need to use an X-ray unit for detection, which greatly saves time and improves overall detection efficiency.

[0010] Furthermore, it also includes a moving mechanism, which moves the fixed unit to the X-ray imaging unit. The moving mechanism is electrically connected to the processor. The fixed unit includes a fixed block, a buckle and a suction cup. The buckle is rotatably connected to the fixed block, the suction cup is fixedly connected to the fixed block, and the suction cup cooperates with the conveyor belt.

[0011] The x-ray camera unit is located on the side of the conveyor belt. The operator opens the buckle, then places the electronic component on it and fixes it with the buckle to ensure that the position of the electronic component does not shift during detection. Then use the suction force of the suction cup to adsorb it on the conveyor belt. When the product is detected as a substandard product, the processor controls the moving mechanism to move the fixed unit away from the conveyor belt and grab it to the x-ray camera unit. The fixed unit of this mechanism is fixed by a suction cup to facilitate the removal of the fixed unit, so that when the x-ray camera unit is required for detection, it will not delay the AOI camera unit detection.

[0012] Furthermore, it also includes a piston and a spring, the fixed block is provided with an inner groove, the piston is slidably and sealedly connected to the inner groove, and the piston divides the inner groove into a cavity and a working fluid cavity, the working fluid cavity is provided with a working fluid, the boiling point of the working fluid is 70-80 ° C, the cavity is connected to the suction cup, one end of the spring is fixedly connected to the piston, and the other end is fixedly connected to the cavity.

[0013] When the power-on unit energizes the electronic component, the electronic component heats up abnormally, causing the temperature of the working fluid cavity to reach the set temperature, and the working fluid in the working fluid cavity vaporizes, causing the piston to move outward, and the piston squeezes the gas in the cavity out, causing the suction cup to inflate, and the suction effect of the suction cup fails. This mechanism makes the suction cup fail through the abnormal temperature of the electronic component, making it easier for the moving mechanism to move the fixed unit.

[0014] Furthermore, the moving mechanism includes an electric cylinder and an electromagnet, the fixed block is a ferromagnetic material, the electric cylinder is fixedly connected to the box, the push rod of the electric cylinder is fixedly connected to the electromagnet, the electromagnet cooperates with the fixed block, and the X-ray camera unit cooperates with the electric cylinder.

[0015] When the power-on unit energizes the electronic component and the electronic component heats up abnormally, the judgment unit sends an electrical signal, and the processor controls the electric cylinder and the electromagnet to start, so that the push rod moves with the electromagnet, and the electromagnet absorbs the column fixed block, and then the push rod retreats and brings the fixed unit to the X-ray camera unit. After the X-ray camera unit is detected, the electromagnet is powered off and the fixed unit falls out. This mechanism achieves the effect of grabbing, moving and placing through the electromagnet and the electric cylinder, saving costs.

[0016] Furthermore, the judgment unit is a contact sensor, which is fixedly connected to the conveyor belt and electrically connected to the processor. The operator adsorbs the suction cup of the fixed unit correspondingly above the contact sensor. When entering the power-on unit, the contact sensor is also powered on. When the electronic component operates normally, the suction cup contacts the contact sensor, the contact sensor is not triggered, and no electrical signal is sent. When the electronic component heats up abnormally, the suction cup is released, the suction cup does not contact the contact sensor, the contact sensor is triggered, an electrical signal is sent, and the electromagnet and the electric cylinder are started. This mechanism uses a contact sensor to determine whether the heating is normal, replacing the existing thermal imaging detection device and saving costs.

[0017] Furthermore, the working fluid is ethanol, and the boiling point of ethanol is 78.4°C. A sealant is provided at the piston sliding position to prevent ethanol from volatilizing, and the working fluid cavity is filled with helium after excluding air. Ethanol is a non-toxic liquid and can serve as a working fluid well.

[0018] This solution also provides an AOI inspection method for automotive electronic components, comprising the following steps: Step S10: The operator fixes the electronic component on the fixing block, and then fixes the fixing block on the conveyor belt through the suction cup; Step S20: The operator starts the conveyor belt, and the electronic components enter the AOI camera unit area. The conveyor belt stops running, and the AOI camera unit performs a round of inspection. If qualified, it enters the next round of inspection. If unqualified, it is marked by the marking unit and then directly transported out through the conveyor belt; Step S30: After a round of inspection, qualified products stop at the power-on unit under the transportation of the conveyor belt. The power-on unit is powered on. If the heat is abnormal, it is sent to the X-ray camera unit for inspection to determine whether the hidden solder joints are abnormal. If the solder joints are abnormal, they are marked by the marking unit. If they are normal, they are qualified products.

[0019] This method does not require all products to be inspected by X-rays, thus saving time and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of an AOI inspection device for automotive electronic components. Figure 2 This is a top view of an AOI inspection device for automotive electronic components. Figure 3 The figure is a structural diagram of the moving mechanism of an AOI inspection device for automotive electronic components.

[0021] The reference numerals in the figure drawings in the specification include: 1. housing; 2. processor; 3. control panel; 4. door; 5. electronic component; 6. fixing unit; 7. conveyor belt; 8. AIO camera unit; 9. first robotic arm; 10. power-on unit; 11. marking unit; 12. second robotic arm; 13. X-ray camera unit; 14. electric cylinder; 15. suction cup; 16. cavity; 17. working fluid cavity; 18. buckle; 19. electromagnet; 20. contact sensor; 21. bottom fixing rod; 22. alarm; 23. piston; 24. spring. DETAILED DESCRIPTION

[0022] As attached Figure 1 As shown: This solution provides an AOI detection device for automotive electronic components 5, including a box body 1, on which a box door 4 is provided, and the box door 4 is used to open the inspection and maintenance equipment. A control panel 3 and a processor 2 are also arranged on the box body 1, and the control panel 3 is electrically connected to the processor 2. A bottom fixing rod 21 is provided at the bottom of the box body 1, which is used to fix the box body 1 to prevent the shaking of the box body 1 and cause the AOI camera unit to shake, resulting in inaccurate focus. An alarm 22 is provided on the top of the box body 1, and the alarm 22 is electrically connected to the processor 2. The alarm 22 is mainly used to alarm unqualified products. When unqualified products appear, the alarm 22 will flash.

[0023] As attached Figure 1 , Figure 2 As shown: The conveyor belt 7 is an existing flat conveyor belt 7, and the fixing unit 6 is fixed on the conveyor belt 7. The fixing unit 6 is used to fix the electronic component 5. The conveyor belt 7 crosses the box body 1. Two groups of AIO camera units 8, power-on units 10 and x-ray camera units 13 are arranged inside the box body 1. The power-on unit 10, a moving mechanism and a marking unit 11 are also arranged. The conveyor belt 7 runs from left to right. The units arranged inside the box body 1 are AIO camera unit 8, power-on unit 10, AIO camera unit 8, power-on unit 10 and marking unit 11 from left to right. There are also two moving mechanisms, which are arranged on the side of the power-on unit 10. The AIO camera unit 8, the power-on unit 10 and the x-ray camera unit 13 all use existing equipment. The AIO camera unit 8 is moved in a plane by the first mechanical arm 9, and the x-ray camera unit 13 is moved in a plane by the second mechanical arm 12.

[0024] As attached Figure 2 , Figure 3 As shown: There are multiple fixing units 6, and the fixing units 6 include a fixing block, a buckle 18 and a suction cup 15. The buckle 18 is rotatably connected to the fixing block. The buckle 18 is used to detachably fix the electronic component 5. The suction cup 15 is fixedly connected to the fixing block. There are multiple contact sensors 20 on the conveyor belt 7. The contact sensor 20 needs to be energized at the power-on unit 10. This can avoid the process disorder caused by the simultaneous triggering of multiple contact sensors 20. The contact sensor 20 does not send an electrical signal when in contact, and sends an electrical signal when not in contact. The suction cup 15 is adsorbed on the conveyor belt 7 with the contact sensor 20. This makes the contact sensor 20 also play a positioning role.

[0025] The fixed block is provided with an inner groove, and the fixed block is a ferromagnetic material, and copper with good thermal conductivity and high cost performance is selected. The piston 23 is connected to the inner groove in a sliding seal, and the piston 23 divides the inner groove into a cavity 16 and a working medium cavity 17. The working medium cavity 17 is provided with a working medium, and the working medium has a boiling point of 70-80 ° C. In this embodiment, ethanol is selected, and the boiling point of ethanol is 78.4 ° C. The cavity 16 is connected to the suction cup 15, and one end of the spring 24 is fixedly connected to the piston 23, and the other end is fixedly connected to the cavity 16.

[0026] The moving mechanism includes an electric cylinder 14 and an electromagnet 19, the fixed block is a ferromagnetic material, the electric cylinder 14 is fixedly connected to the box 1, the push rod of the electric cylinder 14 is fixedly connected to the electromagnet 19, the electromagnet 19 cooperates with the fixed block, the X-ray imaging unit is located within the range of movement of the electric cylinder 14, and the X-ray imaging unit is located above the electric cylinder 14. The electric cylinder 14 and the fixed block are at the same height.

[0027] As attached Figure 1 , Figure 2 , Figure 3 As shown: The principle of this solution is that the operator fixes the electronic component 5 on the fixing block, and then fixes the fixing block on the position with the contact sensor 20 on the conveyor belt 7 through the suction cup 15. The operator starts the conveyor belt 7, and the electronic component 5 enters the AOI camera unit area. The processor 2 controls the conveyor belt 7 to stop running, and the AOI camera unit performs a round of inspection. If it is qualified, it enters the next round of inspection. If it is unqualified, the marking unit 11 marks it and then it is directly transported out through the conveyor belt 7.

[0028] After a round of qualified products are transported by the conveyor belt 7, they stop at the power supply unit 10, which is powered on, so that the contact sensor 20 is powered on at the same time. If the heat reaches the set temperature, the ethanol in the working medium chamber 17 will boil and gasify, causing the internal space to expand, and the piston 23 will move. The movement of the piston 23 causes the gas in the cavity 16 to be sent to the suction cup 15, causing the suction cup 15 to lose its adsorption capacity.

[0029] At this time, the contact sensor 20 is not touched, and the contact sensor 20 sends an electrical signal. The processor 2 controls the electric cylinder 14 and the electromagnet 19 to start. The electric cylinder 14 brings the electromagnet 19 to contact the fixed block and adsorbs the fixed block. Then the electric cylinder 14 takes the fixed block away from the conveyor belt 7 and returns to the range of the x-ray imaging unit 13. The x-ray imaging unit 13 starts detection.

[0030] The X-ray camera unit 13 detects and determines whether the hidden solder joint is abnormal. If the solder joint is abnormal, it is marked by the marking unit 11, and if it is normal, it is a qualified product. After the X-ray camera unit 13 completes the detection, the electromagnet 19 is powered off, and the fixing unit 6 falls out and falls into the collection bucket.

[0031] The beneficial effects of this solution are as follows: 1. This solution performs a power-on test through the power-on unit 10, and then determines whether the heating is abnormal through the judgment unit. When the surface components and solder joints are not problematic, if the power-on heating is normal, then the hidden solder joints are likely to be normal, and there is no need to perform an X-ray unit for detection, which greatly saves time and improves the overall detection efficiency. 2. The mechanism uses the abnormal temperature of the electronic component 5 to make the suction cup 15 ineffective, making it convenient for the mobile mechanism to move the fixed unit 6. 3. This mechanism achieves the effect of grabbing, moving and placing through the electromagnet 19 and the electric cylinder 14, saving costs. 4. This mechanism determines whether the heating is normal through the contact sensor 20, replacing the existing thermal imaging detection device, saving costs. At the same time, the contact sensor 20 can also play a positioning role, which is convenient for the fixed unit 6 to be fixed. 5. The linkage between the power-on unit 10 and the contact sensor 20 ensures that the contact sensor 20 will only have electricity at the power-on unit 10, and will not work at other times, preventing multiple contact sensors 20 from being disordered.

[0032] This solution also provides a 5AOI inspection method for automotive electronic components, including the following steps: Step S10: The operator fixes the electronic component 5 on the fixing block, and then fixes the fixing block on the conveyor belt 7 through the suction cup 15; Step S20: The operator starts the conveyor belt 7, and the electronic component 5 enters the AOI camera unit area. The conveyor belt 7 stops running, and the AOI camera unit performs a round of inspection. If it is qualified, it enters the next round of inspection. If it is unqualified, the marking unit 11 marks it and then it is directly transported out through the conveyor belt 7; Step S30: After a round of inspection, qualified products stop at the power-on unit 10 under the transportation of the conveyor belt 7. The power-on unit 10 is powered on. If the heat is abnormal, it is sent to the X-ray camera unit 13 for inspection to determine whether the hidden solder joint is abnormal. If the solder joint is abnormal, it is marked by the marking unit 11. If it is normal, it is a qualified product.

[0033] This method does not require all products to be inspected by X-rays, thus saving time and improving efficiency.

[0034] The above are only embodiments of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An AOI inspection device for automotive electronic components (5), comprising: Box body (1): the box body (1) is provided with a control panel (3); Conveyor belt (7): the conveyor belt (7) cooperates with the box (1), and the conveyor belt (7) is used to transport the electronic components (5); AOI camera unit: The AOI camera unit is located inside the box (1), and the AOI camera unit is used to inspect the electronic components (5). X-ray imaging unit: the X-ray imaging unit is used to detect the shielded part of the electronic component (5); Fixing unit (6): the fixing unit (6) is used to fix the electronic component (5), and the fixing unit (6) cooperates with the conveyor belt (7); Processor (2): the processor (2) is fixedly connected to the box (1), and the conveyor belt (7), the AOI camera unit and the X-ray camera unit are all electrically connected to the processor (2); It is characterized by further comprising: Power-on unit (10): the power-on detection unit is used to power on the electronic component (5); Judgment unit: the judgment unit is used to judge whether the electronic component (5) is heating abnormally; The AOI imaging unit, the power supply unit (10), the judgment unit and the X-ray imaging unit are connected in sequence.

2. The AOI inspection device for automotive electronic components (5) according to claim 1, characterized in that: The apparatus further comprises a moving mechanism, wherein the moving mechanism moves the fixing unit (6) to the X-ray imaging unit, the moving mechanism being electrically connected to the processor (2), the fixing unit (6) comprising a fixing block, a buckle (18) and a suction cup (15), the buckle (18) being rotatably connected to the fixing block, the suction cup (15) being fixedly connected to the fixing block, and the suction cup (15) being matched with the conveyor belt (7).

3. The AOI inspection device for automotive electronic components (5) according to claim 2, characterized in that: It also includes a piston (23) and a spring (24), wherein the fixed block is provided with an inner groove, the piston (23) is slidably and sealingly connected to the inner groove, and the piston (23) divides the inner groove into a cavity (16) and a working fluid cavity (17), wherein a working fluid is provided in the working fluid cavity (17), and the working fluid has a boiling point of 70-80°C, the cavity (16) is communicated with the suction cup (15), and one end of the spring (24) is fixedly connected to the piston (23), and the other end is fixedly connected to the cavity (16).

4. The AOI inspection device for automotive electronic components (5) according to claim 3, characterized in that: The moving mechanism comprises an electric cylinder (14) and an electromagnet (19); the fixed block is made of ferromagnetic material; the electric cylinder (14) is fixedly connected to the box (1); the push rod of the electric cylinder (14) is fixedly connected to the electromagnet (19); the electromagnet (19) cooperates with the fixed block; and the X-ray imaging unit cooperates with the electric cylinder (14).

5. The AOI inspection device for automotive electronic components (5) according to claim 4, characterized in that: The judgment unit is a contact sensor (20), the contact sensor (20) is fixedly connected to the conveyor belt (7), and the contact sensor (20) is electrically connected to the processor (2).

6. The AOI inspection device for automotive electronic components (5) according to claim 4, characterized in that: The working fluid is ethanol, and the boiling point of ethanol is 78.4°C.

7. An AOI inspection method for automotive electronic components (5), characterized in that: The following steps are involved: step S10: The operator fixes the electronic component (5) on the fixing block, and then fixes the fixing block on the conveyor belt (7) through the suction cup (15); Step S20: the operator starts the conveyor belt (7), the electronic component (5) enters the AOI camera unit area, the conveyor belt (7) stops running, the AOI camera unit performs a round of inspection, if qualified, it enters the next round of inspection, if unqualified, it is marked by the marking unit (11), and then directly transported out through the conveyor belt (7); Step S30: After a round of inspection, qualified products are transported by the conveyor belt (7) and stop at the power-on unit (10). The power-on unit (10) is powered on. If the heat generation is abnormal, the products are sent to the X-ray imaging unit (13) for inspection to determine whether the hidden solder joints are abnormal. If the solder joints are abnormal, they are marked by the marking unit (11). If they are normal, they are qualified products.

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