CN111289782A

CN111289782A - Mini/MicroLED short circuit test fixture and test method

Info

Publication number: CN111289782A
Application number: CN202010287999.8A
Authority: CN
Inventors: 张凯
Original assignee: Wessent (dongguan) Technology Co Ltd
Current assignee: Wessent (dongguan) Technology Co Ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-06-16

Abstract

The invention discloses a Mini/MicroLED short circuit test fixture and a test method, wherein the Mini/MicroLED short circuit test fixture comprises a test machine main body, a product placing area, a probe test mechanism, a PCB and a control assembly cover shell are arranged on the test machine main body, the product placing area, the probe test mechanism and the PCB are all arranged on the upper end surface of the test machine main body, the probe test mechanism is positioned behind the product placing area, the PCB is positioned behind the probe test mechanism, the control assembly cover shell is positioned above the probe test mechanism and the PCB, the control assembly cover shell is rotatably connected with the rear side of the test machine main body through a hinge, and the probe test mechanism and the control assembly cover shell are both electrically connected with the PCB; the invention can carry out precise individual resistance test on each Mini/MicroLED, has high detection efficiency and small equipment volume, improves the detection quality of products, and can be connected with a signal source case to carry out rapid aging test on the products.

Description

Mini/MicroLED short circuit test fixture and test method

Technical Field

The invention relates to the technical field of LED detection, in particular to a Mini/MicroLED short circuit test fixture and a test method.

Background

The device with the display screen on the market realizes projection basically through LED lamps, for example, devices such as mobile phones and televisions, now, backlight of many display products is gradually replaced by Mini/MicroLED from traditional LED, and devices with the display screen are increasing, so that the Mini/MicroLED needs to meet market requirements through mass production, but the Mini/MicroLED after mass production needs to be detected through detection equipment to ensure quality.

Relevant technical laws and regulations or standards are put forward in some important LED regional markets all over the world, and certification requirements are put forward for application of LED illumination certification. The detection standard of the LED product is used for making unified inspection items and inspection descriptions for lamps produced by companies, and the items detected by the LED product comprise electrical performance parameters, optical parameters, structural appearance and reliability tests; in the production process, part of LEDs can be in short circuit, current does not pass through a load during short circuit and only flows in a power supply, the internal resistance is small, the current is large, strong current can generate large heat effect and mechanical effect, the power supply or the circuit can be damaged or fire can be caused, and therefore, the short circuit detection of the product is very important; simultaneously, the Mini/micro LED as novel product more need detect it and carry out the analysis to its data that detect out, perfect improvement performance, and detection tool on the current market needs artifical manual detection, and is bulky, inefficient, and the present Mini/micro LED lamp market enlarges gradually, and the productivity needs to increase, and old side tool efficiency can not keep up with. In order to save space, reduce manual operation, save tool cost, increase test efficiency, for this reason, we developed a Mini/micro led short circuit test tool.

Disclosure of Invention

The invention aims to provide a Mini/MicroLED short circuit test fixture and a test method, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a Mini/micro LED short circuit test tool, includes the test machine main part, be equipped with product placement area, probe accredited testing organization, PCB board and control assembly lid shell in the test machine main part, product placement area, probe accredited testing organization and PCB board all set up at test machine main part up end, probe accredited testing organization is located product placement area rear, the PCB board is located probe accredited testing organization rear, control assembly lid shell is located the top of probe accredited testing organization and PCB board, just rotatable coupling is done through the hinge to control assembly lid shell and test machine main part rear side, probe accredited testing organization with control assembly lid shell all with PCB board electric connection, the both corners of test machine main part up end front end all is equipped with the button, PCB board and two button electric connection, and two buttons are series connection circuit.

Preferably, be equipped with a plurality of location fine tuning blocks around the district is placed to the product, it is a plurality of location fine tuning block laminating product is placed the marginal setting in district.

Preferably, the probe testing mechanism mainly comprises vertical guide rail fixing blocks at two sides, a needle block movable plate and a servo motor arranged between the vertical guide rail fixing blocks at two sides, the output end above the servo motor is provided with a screw rod, the central part of the needle block movable plate is provided with a screw rod nut, the screw rod is in threaded connection with the screw rod nut, the left end and the right end of the needle block movable plate are movably connected with the vertical guide rail fixed blocks on the two sides, the vertical guide rail fixed blocks on the two sides can be matched with a servo motor to output and rotate to drive the needle block movable plate to perform vertical transmission, position sensors are arranged behind the vertical guide rail fixed blocks on the two sides, the needle block movable plate is provided with a guide rail mounting plate, the front end surface of the guide rail mounting plate is provided with a horizontal slide rail, a plurality of probe blocks are slidably mounted on the horizontal guide rail, and the PCB is electrically connected with the position sensor, the servo motor and the probe blocks.

Preferably, the upper end face of the guide rail mounting block is provided with a plurality of threaded holes, the threaded holes are arranged in a linear array, the upper ends of the probe blocks are provided with extending portions, the extending portions are located above the threaded holes and provided with slots, and each probe block can pass through the slotted threaded connection threaded hole through a fastening screw to be pressed and fixed.

Preferably, each probe block further comprises a probe block PCB board embedded in the probe block and a plurality of probes arranged at the lower end of the probe block, and the probe block PCB board is electrically connected with the plurality of corresponding probes and the PCB board.

Preferably, the PCB board includes main control MCU, lift control unit, video output unit, touch screen control unit, signal storage unit, signal output unit, data input unit, sensing feedback unit, pilot lamp output unit and detection feedback unit all with main control MCU electric connection, signal output unit and detection feedback unit still with needle piece PCB board electric connection, main control MCU is the singlechip, its model is: stm32f103vct 6.

Preferably, terminal surface is equipped with touch control screen, shift knob, switch pilot lamp and a plurality of signal indication lamp before the control assembly lid shell, control assembly lid shell rear side still is provided with two heat dissipation fans, touch control screen, shift knob, switch pilot lamp, a plurality of signal indication lamp and two heat dissipation fans all with probe accredited testing organization on the PCB board electric connection that sets up.

Preferably, the tester main body at least further comprises a power interface for connecting a power supply and a data transmission interface for data information transmission, the power interface and the data transmission interface are both arranged on the rear side of the tester main body, and the power interface and the data transmission interface are both electrically connected with the PCB.

The invention also provides a testing method of the Mini/MicroLED short circuit testing jig, which comprises the following steps:

s1, connecting the tester body with a power supply through a power line, and actuating a switch button, wherein a switch indicator lamp positioned beside the switch button lights green light, and the test fixture is in a starting state;

s2, the click button controls the servo motor to rotate to drive the needle block movable plate to move downwards, so that a plurality of probes at the lower end of the probe block are in point contact connection with PIN points on a product;

s3, a point control touch control screen controls the PCB to output a detection circuit to the pin block PCB of the probe block, and then a detection signal is output to a detection product through the probe;

s4, the detection circuit detects the product, the data obtained after detection is fed back to the pin block PCB through the probe, the pin block PCB transmits the data to the main control MCU on the PCB, and the detected bad data are displayed on the touch control screen and the signal indicating lamps.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, through the arrangement of the probe block and the PCB, a plurality of probes are contacted with a product and are subjected to a rapid resistance test short circuit condition through the output signal of the PCB, so that the efficiency is improved and the accuracy is higher.

2. According to the invention, the two buttons are arranged and are in a series circuit, so that the servo motor can be driven to rotate only by clicking the buttons at two corners at the same time, and the servo motor is effectively prevented from being driven due to mistaken touch.

3. According to the invention, through the arrangement of the plurality of positioning fine adjustment blocks, the detection product can be positioned and fixed, and the detection result is effectively prevented from being influenced by the position change of the product during product detection and test.

4. According to the invention, the probe block is adjusted to move left and right on the horizontal slide rail through the arrangement of the horizontal slide rail, the threaded hole and the groove on the probe block, and is screwed and fixed through the fastening screw, so that different products can be detected through the adjustment of the probe block.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a probe test mechanism and a PCB board according to the present invention;

FIG. 3 is a schematic view of a probe tile of the present invention;

FIG. 4 is a diagram showing a connection state between a tester body and a signal source case according to the present invention;

FIG. 5 is a block schematic of the present invention;

FIG. 6 is a schematic diagram of a switching detection circuit of the present invention;

FIG. 7 is a schematic diagram of a resistance test circuit of the present invention;

FIG. 8 is a schematic diagram of a master MCU circuit of the present invention.

The reference numerals and names in the figures are as follows:

1. a tester body; 2. a product placement area; 3. a probe testing mechanism; 4. a PCB board; 5. a control assembly cover housing; 6. a hinge; 7. a button; 8. positioning a fine adjustment block; 9. a vertical guide rail fixing block; 10. a needle block movable plate; 11. a servo motor; 12. a screw rod; 13. a feed screw nut; 14. a position sensor; 15. a guide rail mounting plate; 16. a horizontal guide rail; 17. a probe block; 18. a threaded hole; 19. an extension portion; 20. grooving; 21. fastening screws; 22. a pin block PCB board; 23. a probe; 24. a touch control screen; 25. a switch button; 26. switching on and off an indicator light; 27. a signal indicator light; 28. a heat dissipation fan; 29. a power interface; 30. a data transmission interface; 31. a main control MCU; 32. a lift control unit; 33. a video output unit; 34. a touch screen control unit; 35. a signal storage unit; 36. a signal output unit; 37. a data input unit; 38. a sensing feedback unit; 39. an indicator light output unit; 40. a detection feedback unit; 41. a signal source case; 42. and connecting the lead.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, an embodiment of the present invention includes: a Mini/MicroLED short circuit test fixture comprises a tester main body 1, wherein a product placing area 2, a probe test mechanism 3, a PCB 4 and a control component cover shell 5 are arranged on the tester main body 1, the product placing area 2, the probe test mechanism 3 and the PCB 4 are all arranged on the upper end surface of the tester main body 1, the probe test mechanism 3 is positioned behind the product placing area 2, the PCB 4 is positioned behind the probe test mechanism 3, the control component cover shell 5 is positioned above the probe test mechanism 3 and the PCB 4, the control component cover shell 5 is rotatably connected with the rear side of the tester main body 1 through a hinge 6, the probe test mechanism 3 and the control component cover shell 5 are both electrically connected with the PCB 4, two corners of the front end of the upper end surface of the tester main body 1 are both provided with buttons 7, and the PCB 4 is electrically connected with the two buttons 7, and two buttons 7 are series connection circuits, this embodiment is used for testing a MINI/micro led lamp chip with PIN points, a plurality of MINI/micro leds are arranged on the lamp chip, and the MINI/micro leds are connected in series, the probe 23 on the probe testing mechanism 3 is in point contact connection with the PIN on the MINI/micro led lamp chip, so that each MINI/micro led on the MINI/micro led lamp chip can be individually connected.

Specifically, the product is placed and is equipped with a plurality of location fine tuning blocks 8 around the district 2, and is a plurality of the marginal setting of district 2 is placed to 8 laminating products of location fine tuning blocks, can fix a position the detection product, and product position changes and influence testing result when effectively preventing the product from examining the test.

Specifically, the probe test mechanism 3 mainly comprises two side vertical guide rail fixing blocks 9, a needle block movable plate 10 and a servo motor 11 arranged between the two side vertical guide rail fixing blocks 9, an output end above the servo motor 11 is provided with a lead screw 12, the center part of the needle block movable plate 10 is provided with a lead screw nut 13, the lead screw 12 is in threaded connection with the lead screw nut 13, the left end and the right end of the needle block movable plate 10 are movably connected with the two side vertical guide rail fixing blocks 9, the two side vertical guide rail fixing blocks 9 can be matched with the servo motor 11 to output and rotate to drive the needle block movable plate 10 to do up-and-down transmission, two sides are provided with a position sensor 14 at the rear part of the vertical guide rail fixing blocks 9, a guide rail mounting plate 15 is arranged on the needle block movable plate 10, a horizontal slide rail 16 is arranged on the front end surface of the, the PCB 4 is electrically connected to the position sensor 14, the servo motor 11 and the plurality of probe blocks 17.

Specifically, guide rail installation piece 15 up end is equipped with a plurality of screw holes 18, and a plurality of screw holes 18 are linear array and arrange, and is a plurality of probe block 17 upper end all is equipped with extension 19, and this extension 19 is located a plurality of screw holes 18 top and is equipped with fluting 20, every probe block 17 accessible fastening screw 21 passes fluting 20 threaded connection screw hole 18 and compresses tightly fixedly it, and probe block 17 moves about on horizontal slide rail 16 and adjusts to it is fixed tightly through fastening screw 21 to it twists, can detect different products to probe block 17's regulation.

Specifically, each probe block 17 further includes a PIN block PCB 22 embedded inside the probe block 17 and a plurality of probes 23 disposed at the lower end of the probe block 17, and the PIN block PCB 22 is electrically connected to the corresponding plurality of probes 23 and the PCB 4, and the servo motor 11 rotates to drive the PIN block movable plate 10 and the probe block 17, so that the probes 23 on the probe block 17 are in point contact connection with the PINs on the MINI/micro led lamp.

Specifically, the PCB 4 includes a main control MCU31, a lifting control unit 32, a video output unit 33, a touch screen control unit 34, a signal storage unit 35, a signal output unit 36, a data input unit 37, a sensing feedback unit 38, an indicator light output unit 39 and a detection feedback unit 40, the lifting control unit 32, the video output unit 33, the touch screen control unit 34, the signal storage unit 35, the signal output unit 36, the data input unit 37, the sensing feedback unit 38, the indicator light output unit 39 and the detection feedback unit 40 are all electrically connected to the main control MCU31, and the signal output unit 36 and the detection feedback unit 40 are also electrically connected to the pin PCB 22. The video output unit 33 and the touch screen control unit 34 are electrically connected to the touch control screen 24, the data input unit 37 is electrically connected to the data transmission interface 30, and the indicator light output unit 39 is electrically connected to the switch indicator light 26 and the signal indicator light 27.

s1, connecting the tester body 1 with a power supply through a power line, and activating the switch button 25, wherein the switch indicator lamp 27 beside the switch button lights green light, and the test fixture is in a power-on state;

s2, the inching button 7 controls the servo motor 11 to rotate to drive the needle block movable plate 10 to move downwards, so that the plurality of probes 23 at the lower end of the probe block 17 are in point contact connection with PIN points on a product;

s3, the point control touch control screen 24 controls the PCB 4 to output a detection circuit to the pin block PCB 22 of the probe block 17, and then outputs a detection signal to a detection product through the probe 23;

s4, the detection circuit detects the product, the data obtained after detection is fed back to the pin block PCB 22 through the probe 23, the pin block PCB 22 transmits the data to the main control MCU31 on the PCB 4, and the detected bad data are displayed on the touch control screen 24 and the signal indicator lamps 27.

According to fig. 6, the connection circuit of the touch screen control unit 34 and the main control MCU31 is a switching detection circuit, and different detection circuits are formed by connecting various combinations of the control terminals DATA, STROBE, RESET, and CS in the figure and the terminal controls X0-X15 and Y0-Y7.

According to the illustration in fig. 7, the connection circuit between the signal storage unit 35 and the main control MCU31 is a resistance test circuit, the relay is controlled by the U19 in the figure to switch the sampling resistance, signals with different ranges are accurately sampled in the signal storage unit 35, and the signals are converted into 0-3V voltage after entering the operational amplifier and then sent to the single chip for judgment. U13 provides reference voltage, U17 is reference voltage source, provides reference voltage for measuring circuit, and touch switch K2 and touch switch K6 access different reference resistance respectively and test the resistance of different scope values. The U18 is a voltage following operational amplifier, an input signal is equivalently sent to an ADC pin of the MCU, and the main control MCU31 calculates the resistance value of the resistor to be tested according to the signal size and an algorithm.

Specifically, master control MCU31 is the singlechip, and its model is: stm32f103vct 6. Referring to fig. 8, a schematic circuit diagram of the master MCU31 is shown, which respectively processes input and output information such as 485, analog channel, ULN2003, and op-amp. U7 is a reference voltage source and provides reference voltage required by sampling for the MCU internal ADC.

Specifically, the terminal surface is equipped with touch control screen 24, shift knob 25, switch pilot lamp 26 and a plurality of signal indicator 27 before the control assembly lid shell 5, control assembly lid shell 5 rear side still is provided with two heat dissipation fans 28, touch control screen 24, shift knob 25, switch pilot lamp 26, a plurality of signal indicator 27 and two heat dissipation fans 28 all with PCB board 4 electric connection.

Specifically, the tester body 1 at least further includes a power interface 29 for connecting a power supply and a data transmission interface 30 for data information transmission, the power interface 29 is connected with the power supply through a power line to supply power to the tester body 1, the data transmission interface 30 is connected with a signal source case 41 through a connecting wire 42, the signal source case 41 is mainly used for inputting a lighting signal source to the tester body 1, the power interface 29 and the data transmission interface 30 are both arranged on the rear side of the tester body 1, and the power interface 29 and the data transmission interface 30 are both electrically connected with the PCB 4.

When the device is used, a power supply is connected with a testing machine main body 1, the testing machine main body 1 is started by pressing the switch button 25, a green light is lightened by the switch button 25, the buttons 7 on the two sides are simultaneously clicked, the servo motor 11 rotates to drive the needle block movable plate 10 and the probe block 17 to move downwards, the probe 23 on the probe block 17 is in point contact connection with a PIN point on a MINI/MicroLED lamp sheet, the main control MCU31 displays on the touch control screen 24 through the video output unit 33, the screen is clicked, the touch screen control unit 34 feeds back control information to the main control MCU31, the main control MCU31 outputs current according to the information in the signal storage unit 35 and outputs the current to the needle block PCB 22 through the signal output unit 36, the needle block PCB 22 lights and detects a product through the probe 23, the detected information is fed back to the main control MCU through the detection feedback unit 40 and displayed on the touch control screen 24 and the signal indicator lamp 27, and the mode is used for testing the resistance of, when the product resistance is smaller than the range value, the short-circuit product is considered to be unqualified, the two-angle button 7 is simultaneously clicked, the servo motor 11 is driven to rotate to drive the needle block movable plate 10 and the probe block 17 to move upwards, the tested product is taken out, and another product can be put in for testing.

The testing machine main body 1 can also be connected with the signal source case 41 through a connecting lead 42, the signal source case 41 inputs a circulating lighting circuit into the testing machine main body 1, the testing machine main body 1 lights the product circularly according to the circuit, the detection feedback unit 40 records the detected defective MINI/MicroLED and displays the record on the touch control screen 24, and the method is used for rapidly aging the product, recording the aging time and damaging the product.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a Mini/MicroLED short circuit test tool, includes test machine main part (1), its characterized in that: the testing machine comprises a testing machine main body (1), a product placing area (2), a probe testing mechanism (3), a PCB (printed circuit board) plate (4) and a control assembly cover shell (5) are arranged on the testing machine main body (1), the product placing area (2), the probe testing mechanism (3) and the PCB plate (4) are all arranged on the upper end face of the testing machine main body (1), the probe testing mechanism (3) is located behind the product placing area (2), the PCB plate (4) is located behind the probe testing mechanism (3), the control assembly cover shell (5) is located above the probe testing mechanism (3) and the PCB plate (4), the control assembly cover shell (5) is rotatably connected with the rear side of the testing machine main body (1) through a hinge (6), the probe testing mechanism (3) and the control assembly cover shell (5) are both electrically connected with the PCB plate (4), buttons (7) are arranged on both corners of the front end face of the testing machine main body (1), the PCB (4) is electrically connected with the two buttons (7), and the two buttons (7) are in series connection with each other.

2. The Mini/micro LED short circuit test fixture of claim 1, wherein: be equipped with a plurality of location fine tuning blocks (8) around product placement area (2), it is a plurality of location fine tuning block (8) laminating product placement area's (2) edge setting.

3. The Mini/micro LED short circuit test fixture of claim 1, wherein: the probe testing mechanism (3) mainly comprises two vertical guide rail fixing blocks (9) on two sides, a needle block movable plate (10) and a servo motor (11) arranged between the two vertical guide rail fixing blocks (9) on two sides, a screw rod (12) is arranged at the output end above the servo motor (11), a screw rod nut (13) is arranged at the central part of the needle block movable plate (10), the screw rod (12) is in threaded connection with the screw rod nut (13), the left end and the right end of the needle block movable plate (10) are movably connected with the vertical guide rail fixing blocks (9) on two sides, the vertical guide rail fixing blocks (9) on two sides can be matched with the servo motor (11) to output rotation to drive the needle block movable plate (10) to perform vertical transmission, two sides are arranged at the rear parts of the vertical guide rail fixing blocks (9), and a guide rail mounting plate (15) is arranged on, terminal surface is equipped with horizontal slide rail (16) before guide rail mounting panel (15), slidable mounting has a plurality of probe card (17) on horizontal guide rail (16), PCB board (4) all with position sensor (14), servo motor (11) and a plurality of probe card (17) electric connection.

4. The Mini/MicroLED short circuit test fixture of claim 3, wherein: guide rail installation piece (15) up end is equipped with a plurality of screw holes (18), and a plurality of screw holes (18) are linear array and arrange, and is a plurality of probe piece (17) upper end all is equipped with extension (19), and this extension (19) are located a plurality of screw holes (18) top and are equipped with fluting (20), every probe piece (17) accessible fastening screw (21) pass fluting (20) threaded connection screw hole (18) and compress tightly fixedly to it.

5. The Mini/MicroLED short circuit test fixture of claim 4, wherein: each probe block (17) further comprises a probe block PCB (22) embedded into the probe block (17) and a plurality of probes (23) arranged at the lower end of the probe block (17), and the probe block PCB (22) is electrically connected with the corresponding probes (23) and the PCB (4).

6. The Mini/micro LED short circuit test fixture of claim 1, wherein: PCB board (4) are including master control MCU (31), lift control unit (32), video output unit (33), touch screen control unit (34), signal memory cell (35), signal output unit (36), data input unit (37), sensing feedback unit (38), pilot lamp output unit (39) and detection feedback unit (40) all with master control MCU (31) electric connection, master control MCU (31) are the singlechip, and its type is: stm32f103vct 6.

7. The Mini/micro LED short circuit test fixture of claim 1, wherein: terminal surface is equipped with touch control screen (24), shift knob (25), switch pilot lamp (26) and a plurality of signal indication lamp (27) before control assembly lid shell (5), control assembly lid shell (5) rear side still is provided with two heat dissipation fans (28), touch control screen (24), shift knob (25), switch pilot lamp (26), a plurality of signal indication lamp (27) and two heat dissipation fans (28) all with PCB board (4) electric connection.

8. The Mini/micro LED short circuit test fixture of claim 1, wherein: the tester main body (1) at least comprises a power interface (29) used for connecting a power supply and a data transmission interface (30) used for transmitting data information, the power interface (29) and the data transmission interface (30) are both arranged on the rear side of the tester main body (1), and the power interface (29) and the data transmission interface (30) are both electrically connected with the PCB (4).

9. A testing method of a Mini/MicroLED short circuit testing jig is characterized by comprising the following steps: the method comprises the following steps:

s1, connecting the tester body (1) with a power supply through a power line, and activating a switch button (25), wherein a switch indicator lamp (27) positioned beside the switch button lights green light, and the test fixture is in a power-on state;

s2, the inching button (7) controls the servo motor (11) to rotate to drive the needle block movable plate (10) to move downwards, so that a plurality of probes (23) at the lower end of the probe block (17) are in point contact connection with PIN points on a product;

s3, a point control touch control screen (24) controls the PCB (4) to output a detection circuit to the pin block PCB (22) of the probe block (17), and then a detection signal is output to a detection product through the probe (23);

s4, the detection circuit detects the product, the data obtained after detection is fed back to the pin block PCB (22) through the probe (23), the pin block PCB (22) is transmitted to the main control MCU (31) on the PCB (4), and the detected bad data is displayed on the touch control screen (24) and the signal indicator lamps (27).