Fingerprint recognition chip testing device and testing method thereof

Abstract

The present invention discloses a fingerprint recognition chip testing device and a testing method thereof, which relates to the technical field of fingerprint recognition chip testing devices. In order to solve the problem that the fingerprint recognition chip in the prior art needs to be tested after it is produced, the testing device generally adopts a contact point to contact the fingerprint recognition chip for power-on testing. However, the contact point is easily contaminated with dust, which increases the resistance. The fingerprint recognition chip is very sensitive to resistance, resulting in the problem that the fingerprint recognition test is not accurate enough. A transfer box is installed above the rotating box, and the transfer box and the rotating box are fixedly connected by fastening screws. A connecting cylinder is installed above the transfer box, and the connecting cylinder is rotatably connected to the transfer box. A nozzle is provided below the conveying mechanism. An upper nozzle and a lower nozzle are respectively installed above and below the nozzle, and the upper nozzle and the lower nozzle are both threadedly connected to the nozzle. An air supply pipe is provided inside the transfer box, and the air supply pipe is welded to the connecting cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of fingerprint recognition chip testing equipment, and in particular to a fingerprint recognition chip testing equipment and a testing method thereof. Background Art

[0002] Fingerprint chips are chips with built-in fingerprint recognition technology. They can realize fingerprint image acquisition, feature extraction, and feature comparison on-chip. Developers can easily implement fingerprint recognition functions, which greatly reduces the threshold of the fingerprint recognition industry and has a very positive role in promoting the promotion of fingerprint recognition. After the fingerprint recognition chip is produced, it needs to be tested. The test equipment generally uses contacts to contact the fingerprint recognition chip and conduct power-on testing.

[0003] For example, application publication number CN207051444U discloses a fingerprint recognition chip test device, which belongs to the field of integrated circuit testing. The fingerprint recognition chip test device includes a carrier for carrying a chip substrate, a probe module, and a fingerprint simulation component. The fingerprint simulation component includes at least two fingerprint simulation heads for simulating fingerprint information, and a probe module containing at least two sets of probes for connecting the fingerprint recognition chip and the tester. The chip substrate is provided with at least two fingerprint recognition chips. The at least two fingerprint simulation heads of the fingerprint simulation component are in one-to-one contact with the bottoms of the same number of fingerprint recognition chips on the carrier, and the at least two sets of probes of the probe module are in one-to-one contact with the tops of the same number of fingerprint recognition chips on the carrier.

[0004] During the production process of the above application, a motor is used to drive the fingerprint recognition chip substrate to be tested row by row, and multiple chips are tested at the same time each time, which greatly improves the test efficiency of the fingerprint recognition chip. However, the contacts are easily contaminated with dust, which increases the resistance. The fingerprint recognition chip is very sensitive to resistance, resulting in inaccurate fingerprint recognition testing. Therefore, the market urgently needs to develop a fingerprint recognition chip testing device and its testing method to help people solve the existing problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a fingerprint recognition chip testing device and a testing method thereof, so as to solve the problem that the fingerprint recognition chip needs to be tested after it is produced, as mentioned in the above background technology. The testing equipment generally uses contacts to contact the fingerprint recognition chip for power-on testing, but the contacts are easily contaminated with dust, which increases resistance. The fingerprint recognition chip is very sensitive to resistance, resulting in inaccurate fingerprint recognition testing.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a fingerprint recognition chip testing device, comprising a conveying mechanism and a rotating box, a transfer box is installed above the rotating box, and the transfer box and the rotating box are fixedly connected by fastening screws, a connecting cylinder is installed above the transfer box, and the connecting cylinder is rotatably connected to the transfer box, a nozzle is provided below the conveying mechanism, an upper nozzle and a lower nozzle are respectively installed above and below the nozzle, and the upper nozzle and the lower nozzle are both threadedly connected to the nozzle, an air pipe is provided inside the transfer box, and the air pipe is welded to the connecting cylinder, a perforation is provided on the outside of the air pipe, and the perforation and the air pipe are arranged as an integrated structure, a filter element is installed inside the transfer box, and the filter element is fixedly connected to the transfer box by fastening screws, an air pump is installed on one side of the transfer box, and the air pump is connected to the transfer box.

[0007] Preferably, a worm gear is provided inside the rotating box, and the worm gear is fixedly connected to the air pipe by fastening screws, a worm is installed inside the rotating box, and the worm is rotationally connected to the rotating box through a bearing, and the worm is meshed with the worm gear, and a first motor is installed inside the rotating box, a driving wheel is installed on one side of the first motor, and the driving wheel is fixedly connected to the first motor through a coupling, a driven wheel is installed on the outside of the worm, and the driven wheel is fixedly connected to the worm by the same fastening screws, and the driven wheel is rotationally connected to the driving wheel by a belt.

[0008] Preferably, a first feeding wheel and a second feeding wheel are respectively installed inside the conveying mechanism, and the first feeding wheel and the second feeding wheel are rotatably connected to the conveying mechanism through bearings, a first conveyor belt is installed on the outside of the first feeding wheel, and the first conveyor belt is in contact with the first feeding wheel, and a second conveyor belt is installed on the outside of the second feeding wheel, and the second conveyor belt is in contact with the second feeding wheel.

[0009] Preferably, a chip frame is provided inside the conveying mechanism, the first conveyor belt and the second conveyor belt are both fitted with the chip frame, a contact substrate is installed below the chip frame, and the contact substrate and the chip frame are fixedly connected by fastening screws, and a fingerprint recognition chip is provided above the contact substrate.

[0010] Preferably, a lifting box is provided below the conveying mechanism, a test plate is provided above the lifting box, a screw is installed below the test plate, and the screw and the test plate are fixedly connected by fastening screws, a threaded seat is installed inside the lifting box, and the threaded seat is rotatably connected to the lifting box, the threaded seat is threadedly connected to the screw, a contact head is installed above the test plate, and the contact head is electrically connected to the test plate.

[0011] Preferably, a limiting shaft is installed under the test plate, and the limiting shaft and the test plate are fixedly connected by fastening screws, a limiting seat is installed on one side of the lifting box, the limiting shaft and the limiting seat are slidably connected, and a driven gear is installed on the outer side of the threaded seat, and the driven gear and the threaded seat are fixedly connected by fastening screws.

[0012] Preferably, a second motor is installed inside the lifting box, a reducer is installed above the second motor, and the reducer and the second motor are fixedly connected through a coupling, a driving gear is installed above the reducer, and the driving gear and the reducer are fixedly connected through a coupling, and the driving gear is engaged with the driven gear.

[0013] Preferably, a test box is provided below the conveying mechanism, a mainboard is installed inside the test box, and the mainboard and the test box are fixedly connected by fastening screws, a processor is installed on the front end surface of the mainboard, and the processor is electrically connected to the mainboard.

[0014] A method for testing a fingerprint recognition chip test device comprises the following steps:

[0015] Step 1: Place the fingerprint recognition chip inside the chip frame so that the fingerprint recognition chip is connected to the contact substrate;

[0016] Step 2: Use the air pump, nozzle, upper nozzle and lower nozzle to blow directly to clean the bottom of the contact substrate and the contact head;

[0017] Step 3: Move the nozzle out of the test station at the bottom of the conveying mechanism by rotating the box;

[0018] Step 4: Lift the test board upwards through the lifting box so that the contact head contacts the contact substrate to form a test circuit;

[0019] Step 5: Use the test box to connect to the fingerprint recognition chip and test the fingerprint recognition chip.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The invention is equipped with an air pump, a rotating box, a nozzle, an upper nozzle and a lower nozzle. Before testing the fingerprint recognition chip, the rotating box is used to rotate the nozzle between the chip frame and the test board, so that the upper nozzle is facing the contact substrate and the lower nozzle is facing the contact head. Then the air pump is used to deliver high-pressure airflow to the inside of the nozzle, and the upper nozzle and the lower nozzle are used to directly blow and clean the contact substrate and the contact head respectively, thereby avoiding a large amount of dust adhering to the surface of the contact substrate and the contact head. This avoids interference caused by dust when testing the fingerprint recognition chip, thereby improving the test accuracy of the fingerprint recognition chip.

[0022] 2. The invention sets a filter element in the transfer box. The filter element can filter the air and remove impurities in the air to make the air blown out cleaner, so that the dust on the surface of the contact substrate and the contact head can be removed more efficiently, thereby improving the reliability of the fingerprint recognition chip testing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of a fingerprint recognition chip testing device of the present invention;

[0024] Figure 2 This is an enlarged schematic diagram of point A in the figure of the present invention;

[0025] Figure 3 is a cross-sectional view of a chip frame of the present invention;

[0026] Figure 4 This is an enlarged schematic diagram of point B in the figure of the present invention;

[0027] Figure 5 This is an enlarged schematic diagram of point C in the figure of the present invention;

[0028] Figure 6 It is an enlarged schematic diagram of point D in the figure of the present invention.

[0029] In the figure: 1. Conveying mechanism; 2. Chip frame; 3. First feeding wheel; 4. First conveyor belt; 5. Second feeding wheel; 6. Second conveyor belt; 7. Nozzle; 8. Upper nozzle; 9. Lower nozzle; 10. Fingerprint recognition chip; 11. Contact substrate; 12. Rotating box; 13. Transfer box; 14. Connecting tube; 15. Air pipe; 16. Filter element; 17. Perforation; 18. Air pump; 19. Worm gear; 20. Worm; 21. First motor; 22. Driving wheel; 23. Driven wheel; 24. Lifting box; 25. Test board; 26. Contact head; 27. Screw; 28. Limiting shaft; 29. ​​Limiting seat; 30. Threaded seat; 31. Driven gear; 32. Second motor; 33. Reducer; 34. Driving gear; 35. Test box; 36. Main board; 37. Processor. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] See also Figure 1-6, an embodiment of the present invention provides: a fingerprint recognition chip testing device, comprising a conveying mechanism 1 and a rotating box 12, a transfer box 13 is installed above the rotating box 12, and the transfer box 13 is fixedly connected to the rotating box 12 by fastening screws, a connecting cylinder 14 is installed above the transfer box 13, and the connecting cylinder 14 is rotatably connected to the transfer box 13, a nozzle 7 is provided below the conveying mechanism 1, an upper nozzle 8 and a lower nozzle 9 are respectively installed above and below the nozzle 7, and the upper nozzle 8 and the lower nozzle 9 are both threadedly connected to the nozzle 7, an air supply pipe 15 is provided inside the transfer box 13, and the air supply pipe 15 is welded to the connecting cylinder 14, a through hole 17 is provided on the outside of the air supply pipe 15, and the through hole 17 and the air supply pipe 15 are set as an integrated structure, and the interior of the transfer box 13 is installed Filter element 16, and the filter element 16 is fixedly connected to the transfer box 13 by fastening screws. An air pump 18 is installed on one side of the transfer box 13, and the air pump 18 is connected to the transfer box 13. Before testing the fingerprint recognition chip 10, the rotating box 12 is used to rotate the nozzle 7 between the chip frame 2 and the test board 25, so that the upper nozzle 8 is facing the contact substrate 11 and the lower nozzle 9 is facing the contact head 26. Then the air pump 18 is used to deliver high-pressure airflow to the inside of the nozzle 7, and the upper nozzle 8 and the lower nozzle 9 are used to directly blow and clean the contact substrate 11 and the contact head 26 respectively, so as to avoid a large amount of dust adhering to the surface of the contact substrate 11 and the contact head 26, thereby avoiding interference caused by dust when testing the fingerprint recognition chip 10 and improving the test accuracy of the fingerprint recognition chip 10.

[0032] Furthermore, a worm gear 19 is provided inside the rotating box 12, and the worm gear 19 is fixedly connected to the air pipe 15 by fastening screws. A worm 20 is installed inside the rotating box 12, and the worm 20 is rotationally connected to the rotating box 12 through a bearing, and the worm 20 is meshed with the worm gear 19. A first motor 21 is installed inside the rotating box 12, and a driving wheel 22 is installed on one side of the first motor 21, and the driving wheel 22 is fixedly connected to the first motor 21 through a coupling, and a driven wheel 23 is installed on the outside of the worm 20, and the driven wheel 23 is fixedly connected to the worm 20 by the same fastening screws, and the driven wheel 23 is rotationally connected to the driving wheel 22 through a belt, and the first motor 21 is fixedly connected to the rotating box 12 by fastening screws, and the driving wheel 22 is driven to rotate by the first motor 21, and the driving wheel 22 drives the worm 20 to rotate through the driven wheel 23.

[0033] Furthermore, the interior of the conveying mechanism 1 is respectively installed with a first feeding wheel 3 and a second feeding wheel 5, and the first feeding wheel 3 and the second feeding wheel 5 are rotatably connected to the conveying mechanism 1 through bearings, the outer side of the first feeding wheel 3 is installed with a first conveyor belt 4, and the first conveyor belt 4 is in contact with the first feeding wheel 3, the outer side of the second feeding wheel 5 is installed with a second conveyor belt 6, and the second conveyor belt 6 is in contact with the second feeding wheel 5, and a driving device is provided on the outer side of the conveying mechanism 1 for driving the first feeding wheel 3 and the second feeding wheel 5 to rotate, and limiting pressure wheels are provided on the inner sides of the first conveyor belt 4 and the second conveyor belt 6 for pressing the chip frame 2.

[0034] Furthermore, a chip frame 2 is provided inside the conveying mechanism 1, and the first conveyor belt 4 and the second conveyor belt 6 are both fitted with the chip frame 2. A contact substrate 11 is installed below the chip frame 2, and the contact substrate 11 is fixedly connected to the chip frame 2 by fastening screws. A fingerprint recognition chip 10 is provided above the contact substrate 11, and the contact substrate 11 is electrically connected to the fingerprint recognition chip 10. There are multiple contact substrates 11 and fingerprint recognition chips 10.

[0035] Furthermore, a lifting box 24 is provided below the conveying mechanism 1, a test plate 25 is provided above the lifting box 24, a screw 27 is installed below the test plate 25, and the screw 27 is fixedly connected to the test plate 25 by a fastening screw, a threaded seat 30 is installed inside the lifting box 24, and the threaded seat 30 is rotatably connected to the lifting box 24, the threaded seat 30 is threadedly connected to the screw 27, a contact head 26 is installed above the test plate 25, and the contact head 26 is electrically connected to the test plate 25, the contact head 26 can contact the contact substrate 11, and a contact is provided on the inner side of the contact substrate 11, and conduction is carried out through the contact.

[0036] Furthermore, a limiting shaft 28 is installed under the test plate 25, and the limiting shaft 28 is fixedly connected to the test plate 25 by fastening screws. A limiting seat 29 is installed on one side of the lifting box 24, and the limiting shaft 28 is slidably connected to the limiting seat 29. A driven gear 31 is installed on the outer side of the threaded seat 30, and the driven gear 31 is fixedly connected to the threaded seat 30 by fastening screws. Through the setting of the limiting shaft 28 and the limiting seat 29, the test plate 25 can only move up and down but cannot rotate.

[0037] Furthermore, a second motor 32 is installed inside the lifting box 24, a reducer 33 is installed above the second motor 32, and the reducer 33 is fixedly connected to the second motor 32 through a coupling, a driving gear 34 is installed above the reducer 33, and the driving gear 34 is fixedly connected to the reducer 33 through a coupling, the driving gear 34 is meshed with the driven gear 31, and the second motor 32 and the reducer 33 are fixedly connected to the lifting box 24 by fastening screws.

[0038] Furthermore, a test box 35 is provided below the conveying mechanism 1, and a main board 36 is installed inside the test box 35, and the main board 36 is fixedly connected to the test box 35 by fastening screws. A processor 37 is installed on the front end surface of the main board 36, and the processor 37 is electrically connected to the main board 36, and the main board 36 inside the test box 35 is electrically connected to the test board 25.

[0039] A method for testing a fingerprint recognition chip test device comprises the following steps:

[0040] Step 1: Place the fingerprint recognition chip 10 inside the chip frame 2 so that the fingerprint recognition chip 10 is connected to the contact substrate 11;

[0041] Step 2: Use the air pump 18, nozzle 7, upper nozzle 8 and lower nozzle 9 to blow directly to clean the bottom of the contact substrate 11 and the contact head 26;

[0042] Step 3: Move the nozzle 7 out of the testing station at the bottom of the conveying mechanism 1 by rotating the box 12;

[0043] Step 4: Lift the test board 25 upwards through the lifting box 24 so that the contact head 26 contacts the contact substrate 11 to form a test circuit;

[0044] Step 5: Use the test box 35 to connect with the fingerprint recognition chip 10 to test the fingerprint recognition chip 10.

[0045] Working principle: When in use, the fingerprint recognition chip 10 is placed into the chip frame 2 by a robotic arm, so that the pins of the fingerprint recognition chip 10 are inserted into the preset sockets of the contact substrate 11, so that the fingerprint recognition chip 10 can be powered through the contact substrate 11, and then the chip frame 2 is transported to the test station by the conveying mechanism 1, and the high-pressure airflow is transported to the interior of the transfer box 13 by the air pump 18, and filtered by the filter element 16. The filtered high-pressure airflow enters the air pipe 15 through the perforation 17, enters the connecting tube 14 through the air pipe 15, and enters the nozzle 7 through the connecting tube 14. Finally, the contact substrate 11 and the contact head 26 are directly blown clean through the upper nozzle 8 and the lower nozzle 9, and then the first motor 21 is started, and the first motor 21 drives the driving wheel 22 The driving wheel 22 drives the worm 20 to rotate through the driven wheel 23, the worm 20 drives the air pipe 15 to rotate through the worm gear 19, the air pipe 15 drives the connecting tube 14 to rotate, and the connecting tube 14 drives the nozzle 7 to rotate, so that the test board 25 is unobstructed, and then the second motor 32 is started. The second motor 32 is decelerated by the reducer 33 and drives the driving gear 34 to rotate. The driving gear 34 drives the threaded seat 30 to rotate through the driven gear 31, and the rotation of the threaded seat 30 drives the screw 27 to lift upward, so that the test board 25 moves upward, so that the contact head 26 contacts the contact substrate 11 and is energized, so that the fingerprint recognition chip 10 can be tested through the test box 35, connected to the power through the mainboard 36, and tested and analyzed through the processor 37.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A fingerprint recognition chip testing device, comprising a conveying mechanism (1) and a rotating box (12), characterized in that: A transfer box (13) is installed above the rotating box (12), and the transfer box (13) and the rotating box (12) are fixedly connected by fastening screws. A connecting tube (14) is installed above the transfer box (13), and the connecting tube (14) is rotatably connected to the transfer box (13). A nozzle (7) is provided below the conveying mechanism (1). An upper nozzle (8) and a lower nozzle (9) are installed above and below the nozzle (7), respectively. The upper nozzle (8) and the lower nozzle (9) are both threadedly connected to the nozzle (7). The upper nozzle (8) and the lower nozzle (9) are respectively connected to the nozzle (7). The contact substrate and the contact head are directly blown for dust removal. An air supply pipe (15) is provided inside the transfer box (13), and the air supply pipe (15) is welded to the connecting tube (14). A perforation (17) is provided on the outside of the air supply pipe (15), and the perforation (17) and the air supply pipe (15) are provided as an integrated structure. A filter element (16) is installed inside the transfer box (13), and the filter element (16) is fixedly connected to the transfer box (13) by fastening screws. An air pump (18) is installed on one side of the transfer box (13), and the air pump (18) is connected to the transfer box (13).

2. The fingerprint recognition chip testing device according to claim 1, characterized in that: A worm wheel (19) is provided inside the rotating box (12), and the worm wheel (19) is fixedly connected to the air delivery pipe (15) by a fastening screw. A worm (20) is installed inside the rotating box (12), and the worm (20) is rotationally connected to the rotating box (12) through a bearing. The worm (20) is engaged with the worm wheel (19). A first motor (21) is installed inside the rotating box (12), and a driving wheel (22) is installed on one side of the first motor (21), and the driving wheel (22) is fixedly connected to the first motor (21) through a coupling shaft. A driven wheel (23) is installed on the outside of the worm (20), and the driven wheel (23) is fixedly connected to the worm (20) by a same-structure fastening screw. The driven wheel (23) is rotationally connected to the driving wheel (22) through a belt.

3. The fingerprint recognition chip testing device according to claim 2, characterized in that: A first feeding wheel (3) and a second feeding wheel (5) are respectively installed inside the conveying mechanism (1), and the first feeding wheel (3) and the second feeding wheel (5) are rotatably connected to the conveying mechanism (1) through bearings. A first conveyor belt (4) is installed on the outer side of the first feeding wheel (3), and the first conveyor belt (4) is in contact with the first feeding wheel (3). A second conveyor belt (6) is installed on the outer side of the second feeding wheel (5), and the second conveyor belt (6) is in contact with the second feeding wheel (5).

4. The fingerprint recognition chip testing device according to claim 3, characterized in that: A chip frame (2) is provided inside the conveying mechanism (1), the first conveying belt (4) and the second conveying belt (6) are both fitted with the chip frame (2), a contact substrate (11) is installed below the chip frame (2), and the contact substrate (11) and the chip frame (2) are fixedly connected by fastening screws, and a fingerprint recognition chip (10) is provided above the contact substrate (11).

5. The fingerprint recognition chip testing device according to claim 4, characterized in that: A lifting box (24) is provided below the conveying mechanism (1), a test plate (25) is provided above the lifting box (24), a screw (27) is installed below the test plate (25), and the screw (27) and the test plate (25) are fixedly connected by fastening screws, a threaded seat (30) is installed inside the lifting box (24), and the threaded seat (30) is rotatably connected to the lifting box (24), the threaded seat (30) is threadedly connected to the screw (27), a contact head (26) is installed above the test plate (25), and the contact head (26) is electrically connected to the test plate (25).

6. The fingerprint recognition chip testing device according to claim 5, characterized in that: A limit shaft (28) is installed below the test plate (25), and the limit shaft (28) and the test plate (25) are fixedly connected by fastening screws. A limit seat (29) is installed on one side of the lifting box (24), and the limit shaft (28) is slidably connected to the limit seat (29). A driven gear (31) is installed on the outer side of the threaded seat (30), and the driven gear (31) and the threaded seat (30) are fixedly connected by fastening screws.

7. The fingerprint recognition chip testing device according to claim 6, characterized in that: A second motor (32) is installed inside the lifting box (24), a reducer (33) is installed above the second motor (32), and the reducer (33) and the second motor (32) are fixedly connected via a coupling, a driving gear (34) is installed above the reducer (33), and the driving gear (34) and the reducer (33) are fixedly connected via a coupling, and the driving gear (34) is engaged with the driven gear (31).

8. The fingerprint recognition chip testing device according to claim 7, characterized in that: A test box (35) is provided below the conveying mechanism (1), a mainboard (36) is installed inside the test box (35), and the mainboard (36) and the test box (35) are fixedly connected by fastening screws, a processor (37) is installed on the front surface of the mainboard (36), and the processor (37) is electrically connected to the mainboard (36).

9. A test method for a fingerprint recognition chip test device, implemented based on the fingerprint recognition chip test device of claim 8, characterized in that: The steps include: Step 1: placing the fingerprint recognition chip (10) inside the chip frame (2) so that the fingerprint recognition chip (10) is connected to the contact substrate (11); Step 2: Directly blow dust off the bottom of the contact substrate (11) and the contact head (26) through the air pump (18), the nozzle (7), the upper nozzle (8) and the lower nozzle (9); Step 3: Move the nozzle (7) out of the test station at the bottom of the conveying mechanism (1) by rotating the box (12); Step 4: Lifting the test board (25) upwards by means of the lifting box (24) so ​​that the contact head (26) contacts the contact substrate (11) to form a test circuit; Step five: Use the test box (35) to connect with the fingerprint recognition chip (10) to test the fingerprint recognition chip (10).

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