An interface impedance testing device

Abstract

The present invention discloses an interface impedance testing device, which relates to the field of testing for consumer electronics mainboards. The key points of its technical solution are as follows: It includes a conveyor line, an impedance testing device arranged on one side of the conveyor line, a defective product storage device, and a transfer device that can pick up and place the products on the conveyor line into the impedance testing device, and pick up and place the products tested in the impedance testing device into the defective product storage device or on the conveyor line. A vision system is arranged on the transfer device. The impedance testing device includes a first frame, an impedance tester body arranged on the first frame, a testing fixture, a downward pressing component for pressing the product into the testing fixture, an interface module adapted to the product interface, and a driving component for driving the interface module to insert into or withdraw from the product interface. The interface module is electrically connected to the impedance tester body, and an anti-insertion explosion component is arranged between the driving component and the interface module. The present invention has the advantages of long service life, not easily damaging the product, and high working efficiency.

Description

Technical Field

[0001] The present invention relates to the field of consumer electronics motherboard testing, and more specifically, to an interface impedance testing device. Background Art

[0002] Consumer electronics products refer to electronic products for daily consumer use, which are not necessities of life but only to meet fashion or other needs. Consumer electronics products mainly include: televisions, telephones, personal computers, home office equipment, household electronic health care equipment, automotive electronics, etc. Most consumer electronics products require the use of highly integrated PCB boards, and multiple IO interfaces are usually provided on these PCB boards. During the production process, the impedance of these IO interfaces needs to be tested. The existing testing method is usually to manually plug the interface of the detector into the IO interface of the PCB board to be tested to achieve the impedance testing of each IO interface of the PCB board. This method has low work efficiency, and it is difficult to control the plugging force, resulting in a short service life of the interface of the detector, and it is extremely easy to cause damage to the product to be tested.

[0003] Therefore, a new solution is needed to solve this problem. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an interface impedance testing device, which has the advantages of long service life, not easy to damage the product, and high work efficiency.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions: An interface impedance testing device includes a conveyor line, an impedance testing device arranged on one side of the conveyor line, a defective product storage device, and a transfer device that can pick up and place the product on the conveyor line into the impedance testing device, and pick up and place the product after testing in the impedance testing device into the defective product storage device or the conveyor line. A vision system is arranged on the transfer device. The impedance testing device includes a first frame, an impedance tester body arranged on the first frame, a test fixture, a pressing component for pressing the product into the test fixture, an interface module adapted to the product interface, and a driving component for driving the interface module to insert into or withdraw from the product interface. The interface module is electrically connected to the impedance tester body, and an anti-plug explosion component is arranged between the driving component and the interface module.

[0006] In one of the embodiments, the interface module includes a bottom plate fixed on the first frame, and slide rails fixed on the bottom plate towards the direction of the test fixture. The slide rails are arranged in parallel horizontally in several numbers, and a transfer seat is slidably connected to each slide rail. An interface plug is arranged on each transfer seat, and the interface plugs and the product interfaces are in one-to-one correspondence in terms of quantity and position.

[0007] In one embodiment, the driving assembly includes an interface cylinder fixed on the bottom plate, a chuck fixed on the output end of the interface cylinder, and a card slot provided on the adapter base. The chuck is snap-connected in the card slot, and the driving assembly and the adapter base correspond to each other in number and position.

[0008] In one embodiment, the anti-insertion explosion component includes a cylinder control module and a pressure sensor. The pressure sensor is arranged between the chuck located in the card slot and the adapter base, and the pressure sensor and the interface cylinder are respectively electrically connected to the cylinder control module.

[0009] In one embodiment, the interface plug is connected to the adapter base through a fixture transfer plate. A column groove is provided on the adapter base, and a guide shaft is slidably connected in the column groove. At least two guide shafts are provided, and one end of the guide shaft away from the adapter base is fixedly connected to the fixture transfer plate. A buffer spring is sleeved on the guide shaft between the fixture adapter plate and the adapter base.

[0010] In one embodiment, the pressing fixture includes a bracket fixed on the first frame above the test fixture, a pressing plate slidably connected to the bracket through a guide post, and a pressing cylinder arranged on the bracket for driving the pressing plate to slide towards the test fixture. The pressing plate is arranged parallel to the test fixture, and a pressing fixture is arranged at the relative position of the test fixture on the pressing plate. The pressing fixture is fixedly connected to the pressing plate through bolts.

[0011] In one embodiment, the defective product storage device includes a second frame, a grid tray arranged on the second frame, a three-axis motion module, and a temporary storage fixture. The three-axis motion module is located above the grid tray, the temporary storage fixture is located between the grid tray and the conveyor line. A first rotating cylinder is arranged at the output end of the three-axis motion module, a first fixture suction cup is arranged at the output end of the first rotating cylinder. A second rotating cylinder is arranged on the second frame, the temporary storage fixture is arranged at the output end of the second rotating cylinder. The temporary storage fixture is parallel to the grid tray, and the axis of the first rotating cylinder is perpendicular to the axis of the second rotating cylinder.

[0012] In one embodiment, the transfer device includes a third frame arranged above the conveyor line, a manipulator arranged on the third frame, and a second fixture suction cup arranged at the output end of the manipulator.

[0013] In one embodiment, a card rail is arranged on the first frame, the test fixture is snap-connected in the card rail and locked by bolts, and a position sensor for detecting whether the product is installed in place is arranged in the test fixture.

[0014] In one embodiment, a conductive wear-resistant coating is arranged on the interface plug.

[0015] In summary, the present invention has the following beneficial effects: Through the settings of the conveyor line, impedance testing device, defective product storage device, transfer device, and vision system, the present invention realizes the automatic loading of PCB board products, the automatic testing of IO interface impedance, and the automatic sorting and unloading of qualified and defective products, greatly reducing the input of manual labor. It has the advantages of high detection accuracy and efficiency. And through the setting of the anti-insertion explosion-proof component, on the one hand, the service life of the interface module is improved, and on the other hand, the damage probability of the IO interface of the PCB board product is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the interface impedance testing device according to an embodiment of the present application;

[0017] Figure 2 It is a schematic structural diagram of the impedance testing device in the interface impedance testing device according to an embodiment of the present application;

[0018] Figure 3 It is a schematic structural diagram of the interface module in the interface impedance testing device according to an embodiment of the present application;

[0019] Figure 4 It is a schematic structural diagram of the defective product storage device in the interface impedance testing device according to an embodiment of the present application.

[0020] In the figure: 1, conveyor line; 2, impedance testing device; 21, first frame; 22, in-place sensor; 23, test fixture; 24, interface module; 241, bottom plate; 242, slide rail; 243, adapter seat; 244, interface plug; 245, fixture rotating plate; 246, guide shaft; 25, pressing component; 251, bracket; 252, pressing plate; 253, pressing fixture; 254, pressing cylinder; 26, driving component; 261, interface cylinder; 262, chuck; 3, defective product storage device; 31, second frame; 32, grid tray; 33, three-axis motion module; 34, first rotating cylinder; 35, first fixture suction cup; 36, temporary storage fixture; 37, second rotating cylinder; 4, transfer device; 41, third frame; 42, manipulator; 43, second fixture suction cup. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. The terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] As Figures 1 to 4 shown, an embodiment of the present application provides an interface impedance testing device, including a conveying line 1, an impedance testing device 2 arranged on one side of the conveying line 1, a defective product storage device 3, and a transfer device 4 that can pick and place the products on the conveying line 1 into the impedance testing device 2, and pick and place the products after testing in the impedance testing device 2 into the defective product storage device 3 or the conveying line 1. A vision system is arranged on the transfer device 4, and the vision system can adopt an industrial camera module of the existing technology, which is mainly used for accurately positioning the picking and placing positions of the products by the transfer device 4. The impedance testing device 2 includes a first rack 21, an impedance tester body arranged on the first rack 21, a test fixture 23, a pressing-down assembly 25 for pressing the product into the test fixture 23, an interface module 24 adapted to the product interface, and a driving assembly 26 for driving the interface module 24 to insert into or withdraw from the product interface. The interface module 24 is electrically connected to the impedance tester body. An anti-insertion explosion-proof assembly is arranged between the driving assembly 26 and the interface module 24. When the present invention is used, a PLC general controller also needs to be equipped, and the conveying line 1, the impedance testing device 2, the defective product storage device 3, the transfer device 4, and the vision system are respectively electrically connected to the PLC general controller.

[0024] It should be noted that the impedance tester adopts the existing technology and is not shown in the figure. It is mainly used for testing the impedance, capacitance value, diode conduction performance, open solder, short circuit, etc. of the IO interface of the PCB board. The specific testing methods all adopt the existing technology and will not be elaborated in this embodiment.

[0025] During operation, the product to be tested flows in from one end of the conveyor line 1. The transfer device 4 sucks the product through the vision system and places it in the test fixture 23. The pressing component 25 presses and positions the product in the test fixture 23. The driving component 26 drives the interface module 24 to insert into the IO interface of the product. The interface signal of the product is transmitted to the impedance tester body for tests such as impedance, capacitance value, diode conduction performance, open solder, and short circuit. And through the setting of the anti-insertion explosion component, during the process of the driving component 26 driving the interface module 24 to insert into the product IO interface, if there is a jam or difficulty in insertion, the anti-insertion explosion component will control the driving component 26 to retract so that the interface module 24 withdraws, thus achieving the effect of preventing insertion explosion.

[0026] In the above manner, through the settings of the conveyor line 1, the impedance testing device 2, the defective product storage device 3, the transfer device 4, and the vision system, the automatic feeding of PCB board products, the automatic testing of IO interface impedance, and the automatic sorting and discharging of good and defective products are realized, greatly reducing the input of manual labor. It has the advantages of high detection accuracy and efficiency. And through the setting of the anti-insertion explosion component, on the one hand, the service life of the interface module 24 is improved, and on the other hand, the damage probability of the IO interface of the PCB board product is reduced.

[0027] On this basis, the interface module 24 includes a bottom plate 241 fixed on the first rack 21 and slide rails 242 fixed on the bottom plate 241 in the direction towards the test fixture 23. The slide rails 242 are arranged in parallel horizontally in several numbers. Each slide rail 242 is slidably connected with a transfer seat 243. Each transfer seat 243 is provided with an interface plug 244. The interface plugs 244 and the interfaces of the product are in one-to-one correspondence in terms of quantity and position.

[0028] During operation, the interface plug 244 can insert into or withdraw from the IO interface of the product as the transfer seat 243 moves.

[0029] On this basis, the driving component 26 includes an interface cylinder 261 fixed on the bottom plate 241, a chuck 262 fixed on the output end of the interface cylinder 261, and a card slot arranged on the transfer seat 243. The chuck 262 is snap-connected in the card slot. The driving component 26 and the transfer seat 243 are in one-to-one correspondence in terms of quantity and position.

[0030] In the above manner, through the setting of the driving component 26, the manual plugging and unplugging method is replaced, which has the advantage of accurate and controllable plugging and unplugging force.

[0031] On this basis, the anti-insertion explosion component includes a cylinder control module and a pressure sensor. The pressure sensor is arranged between the chuck 262 located in the card slot and the transfer seat 243. The pressure sensor and the interface cylinder 261 are respectively electrically connected to the cylinder control module.

[0032] Specifically, the cylinder control module is electrically connected to the PLC master controller. The cylinder control module includes a driving unit for controlling the expansion and contraction of the cylinder, a pressure value processing unit, and a clock unit. During use, a corresponding time of 0.1 s - 0.5 s can be set in the clock unit. When there is a jam or difficulty in inserting during the insertion process of the interface plug 244 into the IO interface of the product within the range of 0.1 s - 0.5 s, the driving unit will control the interface plug 244 to withdraw. Among them, a standard value is set in the pressure value processing unit. When the actual pressure value of the pressure sensor is greater than the standard value, it is regarded as a jam or difficulty in inserting.

[0033] In the above manner, on the one hand, the service life of the interface module 24 is improved, and on the other hand, the damage probability of the IO interface of the PCB board product is reduced.

[0034] On this basis, the interface plug 244 is connected to the adapter base 243 through a jig transfer board 245. A column groove is provided on the adapter base 243. A guide shaft 246 is slidably connected in the column groove. At least two guide shafts 246 are provided. One end of the guide shaft 246 away from the adapter base 243 is fixedly connected to the jig transfer board 245. A buffer spring is sleeved on the guide shaft 246 between the jig transfer board and the adapter base 243.

[0035] In the above manner, through the setting of the buffer spring, the interface plug 244 has a buffering ability at the moment of insertion, further reducing the damage rate of the product.

[0036] On this basis, the pressing jig 253 includes a bracket 251 fixed on the first frame 21 above the test jig 23, a pressing plate 252 slidably connected to the bracket 251 through a guide post, and a pressing cylinder 254 provided on the bracket 251 for driving the pressing plate 252 to slide towards the test jig 23. The pressing plate 252 is arranged parallel to the test jig 23, and a pressing jig 253 is provided at a position on the pressing plate 252 opposite to the test jig 23. The pressing jig 253 is fixedly connected to the pressing plate 252 through bolts.

[0037] On this basis, the defective product storage device 3 includes a second rack 31, a grid tray 32 arranged on the second rack 31, a three-axis motion module 33 and a temporary storage fixture 36. The three-axis motion module 33 is located above the grid tray 32, and the temporary storage fixture 36 is located between the grid tray 32 and the conveyor line 1. A first rotary cylinder 34 is arranged at the output end of the three-axis motion module 33, and a first fixture suction cup 35 is arranged at the output end of the first rotary cylinder 34. A second rotary cylinder 37 is arranged on the second rack 31, and the temporary storage fixture 36 is arranged at the output end of the second rotary cylinder 37. The temporary storage fixture 36 is parallel to the grid tray 32, and the axis of the first rotary cylinder 34 is perpendicular to the axis of the second rotary cylinder 37.

[0038] During operation, the product rotates 180 degrees on the horizontal plane with the temporary storage fixture 36 so that the IO interface of the product faces away from one side of the grid tray 32. After the first fixture suction cup 35 sucks the product on the temporary storage fixture 36, it rotates 180 degrees so that the IO interface of the product remains in a vertically upward state. At this time, the three-axis module inserts the product into the grid slot of the grid tray 32 for storage.

[0039] The products in the above method are the products that are unqualified in the previous process inspection, and the qualified products flow out from the other end of the conveyor line 1.

[0040] On this basis, the transfer device 4 includes a third rack 41 arranged above the conveyor line 1, a manipulator 42 arranged on the third rack 41, and a second fixture suction cup 43 arranged at the output end of the manipulator 42.

[0041] On this basis, a clamping rail is arranged on the first rack 21, the test fixture 23 is clamped in the clamping rail and locked by bolts, and a position sensor 22 for detecting whether the product is installed in place is arranged in the test fixture 23.

[0042] In the above method, through the arrangement of the clamping rail, it is convenient to replace the test fixture 23 to be applicable to the testing of different products.

[0043] On this basis, a conductive wear-resistant coating is arranged on the interface plug 244. The conductive coating can adopt the method of electroplating a metal material. Through the arrangement of the conductive coating, the alignment tolerance of the interface plug 244 is larger and the service life is longer.

[0044] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as within the protection scope of the present invention.

Claims

1. An interface impedance testing device, characterized in that: It includes a conveyor line (1), an impedance testing device (2) arranged on one side of the conveyor line (1), a defective product storage device (3), and a transfer device (4) that can pick and place products on the conveyor line (1) into and out of the impedance testing device (2), and pick and place the products after testing in the impedance testing device (2) into the defective product storage device (3) or on the conveyor line (1). A vision system is provided on the transfer device (4). The impedance testing device (2) includes a first frame (21), an impedance tester body arranged on the first frame (21), a test fixture (23), a pressing component (25) for pressing the product into the test fixture (23), an interface module (24) adapted to the product interface, and a driving component (26) for driving the interface module (24) to insert into or withdraw from the product interface. The interface module (24) is electrically connected to the impedance tester body, and an anti-insertion explosion-proof component is arranged between the driving component (26) and the interface module (24); The interface module (24) includes a bottom plate (241) fixed on the first frame (21), and slide rails (242) fixed on the bottom plate (241) in the direction towards the test fixture (23). A plurality of the slide rails (242) are arranged horizontally in parallel. A transfer seat (243) is slidably connected to each of the slide rails (242), and an interface plug (244) is arranged on each of the transfer seats (243). The interface plugs (244) and the product interfaces are in one-to-one correspondence in terms of quantity and position; The driving component (26) includes an interface cylinder (261) fixed on the bottom plate (241), a chuck (262) fixed on the output end of the interface cylinder (261), and a card slot arranged on the transfer seat (243). The chuck (262) is snap-connected in the card slot. The driving component (26) and the transfer seat (243) are in one-to-one correspondence in terms of quantity and position; The anti-insertion explosion-proof component includes a cylinder control module and a pressure sensor. The pressure sensor is arranged between the chuck (262) located in the card slot and the transfer seat (243), and the pressure sensor and the interface cylinder (261) are respectively electrically connected to the cylinder control module.

2. The interface impedance testing device according to claim 1, wherein: The interface plug (244) is connected to the transfer seat (243) through a fixture transfer plate (245). A column groove is arranged on the transfer seat (243), and a guide shaft (246) is slidably connected in the column groove. At least two guide shafts (246) are provided. One end of the guide shaft (246) away from the transfer seat (243) is fixed to the fixture transfer plate (245), and a buffer spring is sleeved on the guide shaft (246) between the fixture transfer plate and the transfer seat (243).

3. The interface impedance testing device according to claim 1, wherein: The pressing component (25) includes a bracket (251) fixed on the first frame (21) above the test fixture (23), a pressing plate (252) slidably connected to the bracket (251) through guide posts, and a pressing cylinder (254) arranged on the bracket (251) for driving the pressing plate (252) to slide towards the test fixture (23). The pressing plate (252) is arranged parallel to the test fixture (23), and a pressing fixture (253) is arranged at the relative position of the test fixture (23) on the pressing plate (252). The pressing fixture (253) is fixedly connected to the pressing plate (252) by bolts.

4. The interface impedance testing device according to claim 1, wherein: The defective product storage device (3) includes a second frame (31), a grid tray (32) arranged on the second frame (31), a three-axis motion module (33) and a temporary storage fixture (36). The three-axis motion module (33) is located above the grid tray (32), and the temporary storage fixture (36) is located between the grid tray (32) and the conveyor line (1). A first rotary cylinder (34) is arranged at the output end of the three-axis motion module (33), and a first fixture suction cup (35) is arranged at the output end of the first rotary cylinder (34). A second rotary cylinder (37) is arranged on the second frame (31), and the temporary storage fixture (36) is arranged at the output end of the second rotary cylinder (37). The temporary storage fixture (36) is parallel to the grid tray (32), and the axis of the first rotary cylinder (34) is perpendicular to the axis of the second rotary cylinder (37).

5. The interface impedance testing device according to claim 1, wherein: The transfer device (4) includes a third frame (41) arranged above the conveyor line (1), a manipulator (42) arranged on the third frame (41), and a second fixture suction cup (43) arranged at the output end of the manipulator (42).

6. The interface impedance testing device according to claim 1, wherein: A clamping rail is arranged on the first frame (21), and the test fixture (23) is clamped in the clamping rail and locked by bolts. A position sensor (22) for detecting whether the product is installed in place is arranged in the test fixture (23).

7. The interface impedance testing device according to claim 1, characterized in that: A conductive wear-resistant coating is arranged on the interface plug (244).

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