Device for preventing wrong insertion of test channel

Abstract

The utility model aims to provide a fool-proof circuit which is simple in structure, low in material cost, more comprehensive in fool-proof performance, applied in a board card level and high in reliability. The device can be applied to mass production projects on a large scale, channel identification of all modules is matched and checked, whether a test line is inserted into a wrong channel or not in the wiring or maintenance process of a clamp can be detected, and inconsistency of internal and external codes of a product is effectively avoided. The device comprises an upper needle diaphragm plate, a lower needle diaphragm plate, an adapter plate, a test machine and an upper computer, the upper needle diaphragm plate comprises a first identification module, the lower needle diaphragm plate comprises a second identification module, the first identification module is connected with the second identification module, the adapter plate is communicated with the upper computer through the test machine, and the upper computer is connected with the test machine. A product is connected into the adapter plate through the upper needle film plate and the lower needle film plate. The utility model is applied to the technical field of electronic product test equipment.

Description

Technical Field

[0001] The utility model is applied to the technical field of electronic product testing equipment, and particularly relates to a test channel mis-insertion prevention device. Background Art

[0002] TB board is the interface board for pointer membrane collection, and EEPROM refers to electrically erasable programmable read-only memory. The channel identification of the existing machine is on the TB board, and the channel ID is identified by a five-bit dialer. However, when the product under test is special and needs to be inserted in sections, the channel identification at this time is defective. There are two needle membrane boards coming out of the product. If they are inserted into the TB board at the same time, the product SN code will be burned incorrectly, and the problem of inconsistent internal and external codes of the product will occur. This will cause the wrong code products to flow to the back end, causing great losses to customers. The existing machine cannot test the needle structure of segmented time, which is easy to cause code writing errors. The PCBA space required for the dialer identification circuit is large and cannot be used on a smaller needle membrane board. Therefore, it is necessary to provide a device with a simple circuit structure, low material cost, more comprehensive anti-fool, board-level application, which can be applied to mass production projects on a large scale, the channel identification of each module matches and checks each other, and can detect whether the fixture inserts the test line into the wrong channel during wiring or maintenance, and effectively avoid the product from having inconsistent internal and external codes. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a device for preventing wrong insertion of test channels with simple circuit structure, low material cost, more comprehensive anti-mistake and board-level application, which can be applied on a large scale to mass production projects, and the channel identification of each module can be matched and checked with each other, and it can detect whether the fixture inserts the test line into the wrong channel during wiring or maintenance, and effectively avoid the inconsistency of internal and external codes in the product.

[0004] The technical solution adopted by the utility model is: the utility model includes an upper needle membrane plate, a lower needle membrane plate, an adapter plate, a testing machine and a host computer, the upper needle membrane plate includes a first recognition module, the lower needle membrane plate includes a second recognition module, the first recognition module is connected to the second recognition module, the adapter plate communicates with the host computer via the testing machine, and the product is connected to the adapter plate via the upper needle membrane plate and the lower needle membrane plate.

[0005] It can be seen from the above scheme that compared with the existing test system, the present application has a more comprehensive anti-mistake function in channel identification, is applied at the board level, can be applied on a large scale to mass production projects, has a simple circuit structure, low material cost, and is easy to add to the needle membrane board. The channel detection system is perfect, and the channel identifications of each module are matched and checked with each other. It can detect whether the fixture has inserted the test line into the wrong channel during wiring or maintenance, and effectively avoid the inconsistency between internal and external codes of the product. A channel identification circuit is added to the needle membrane board, and the EEPROM identification circuit is simplified. It is matched with the channel identification of the TB board and the test machine module, so as to build a more rigorous channel identification system and effectively avoid the inconsistency between internal and external codes of the product.

[0006] A preferred solution is that the SPARE_I2C_SCL pin and the SPARE_I2C_SDA pin of the first identification module are respectively connected to the corresponding pins of the second identification module.

[0007] A preferred solution is that the test channel mis-insertion prevention device further includes a first connector, a second connector, and a third connector, and the adapter board is connected to the test machine via the first connector, the second connector, and the third connector.

[0008] A preferred solution is that the test channel misinsertion prevention device further includes a fourth connector and a fifth connector, the upper needle membrane plate is connected to the adapter plate via the fourth connector, and the lower needle membrane plate is connected to the adapter plate via the fifth connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural block diagram of the utility model;

[0010] Figure 2 It is a flow chart of channel identification inspection of the utility model;

[0011] Figure 3 This is the first example of a channel being plugged in incorrectly;

[0012] Figure 4 This is the second example of a wrong channel insertion;

[0013] Figure 5 is a circuit schematic diagram of the first identification module;

[0014] Figure 6 is a circuit schematic diagram of the second identification module;

[0015] Figure 7 is a circuit schematic diagram of the first connector, the second connector, and the third connector;

[0016] Figure 8 is a circuit schematic diagram of the fourth connector and the fifth connector;

[0017] Fig. 9 It is a circuit schematic diagram of the power supply module. DETAILED DESCRIPTION

[0018] like Figure 1 and Figure 2 As shown, in this embodiment, the utility model includes an upper needle membrane plate 1, a lower needle membrane plate 2, an adapter plate 3, a test machine 4 and a host computer 5, the upper needle membrane plate 1 includes a first recognition module U1, the lower needle membrane plate 2 includes a second recognition module U3, the first recognition module U1 is connected to the second recognition module U3, the adapter plate 3 communicates with the host computer 5 via the test machine 4, and the product 6 is connected to the adapter plate 3 via the upper needle membrane plate 1 and the lower needle membrane plate 2. The model of the first recognition module U1 is CAT24C32YI-GT3, and the model of the second recognition module U3 is CAT9555YI-T2.

[0019] like Figure 3 and Figure 4 As shown, the channel identification function of the fixture of the prior art is generally only done on a single adapter board. This method has a fool-proof defect. When the product has a decentralized connection structure, it is very likely that the wrong plug-in and the recognition will not occur at the same time. The product corresponds to two needle membrane boards, divided into upper and lower needle molds, which are connected to the TB adapter board. The TB board is then connected to the test machine. If the test machine only checks the TB board and the test machine IP, it is not comprehensive. When the upper and lower needle molds are plugged into the wrong channel at the same time, it cannot be detected. Only the TB board has channel identification, which can only detect Figure 3 This channel is plugged in the wrong line; when it appears Figure 4 In the case of the upper and lower needle membranes being inserted incorrectly at the same time, and the TB board being correctly connected to the tester, it cannot be detected. At this time, tester No. 1 will enter the SN of product No. 1 into product No. 2, and the SN of product No. 2 into product No. 1, resulting in product coding errors.

[0020] This application uses the dial identification circuit on the adapter board 3, and then matches it with the EEPROM identification circuit on the needle membrane board, and checks it one by one with the dial IP of the test machine to form a closed-loop system for channel number verification. The storage chip used in this application is CAT24C32YI-GT3. During initialization, the corresponding channel number is first burned in according to the channel position of the upper needle membrane board 1. The adapter board 3 performs dialing and plugging according to the corresponding channel number, and then a single product is used to run a test with a short script on each channel to check whether the IP of the upper needle membrane board 1, the adapter board 3 and the test machine 4 correspond. This inspection scheme is used in the process of wiring and fixture maintenance, which can effectively avoid the problem of inconsistent internal and external codes of products due to wrong plugging of wires.

[0021] This application uses matching identification circuits for corresponding modules, which has the following advantages:

[0022] Foolproofing advantage: the needle-membrane board, the adapter board 3, and the test machine 4 all have their own identification modules, which can effectively prevent product coding errors caused by the needle-membrane assembly line being inserted into the wrong channel;

[0023] Space advantage: The EEPROM circuit in this solution has also been optimized in circuit structure, so the needle membrane board space of the solution is small. Due to the space structure of the board, the identification circuit is simplified into four materials: resistors, capacitors and corresponding chips;

[0024] Channel advantage: The IO expander chip currently used on the adapter board 3 has 16 input / output ports and can support 32-channel fixtures when paired with a five-bit dial. If more channels need to be supported, only the dial needs to be replaced.

[0025] like Figure 5 and Figure 6 As shown, in this embodiment, the SPARE_I2C_SCL pin and the SPARE_I2C_SDA pin of the first identification module U1 are respectively connected to the corresponding pins of the second identification module U3.

[0026] like Figure 7 As shown, in this embodiment, the test channel misinsertion prevention device further includes a first connector J1, a second connector J2, and a third connector J3, and the adapter board 3 is connected to the test machine 4 via the first connector J1, the second connector J2, and the third connector J3.

[0027] like Figure 8 As shown, in this embodiment, the test channel anti-misinsertion device also includes a fourth connector J5 and a fifth connector J6, the upper needle membrane plate 1 is connected to the adapter plate 3 via the fourth connector J5, and the lower needle membrane plate 2 is connected to the adapter plate 3 via the fifth connector J6.

[0028] like Fig. 9 As shown, in this embodiment, the test channel mis-insertion prevention device further includes a power supply module U2, and the power supply module U2 is connected to the first identification module U1 and the second identification module U3. The model of the power supply module U2 is TLV1117-33IDCYR. ​​The power supply module U2 is connected to the fourth connector J5 to supply power to the first identification module U1.

Claims

1. A test channel misinsertion prevention device, characterized in that: It comprises an upper needle membrane plate (1), a lower needle membrane plate (2), an adapter plate (3), a testing machine (4) and a host computer (5), wherein the upper needle membrane plate (1) comprises a first identification module (U1), the lower needle membrane plate (2) comprises a second identification module (U3), the first identification module (U1) is connected to the second identification module (U3), the adapter plate (3) communicates with the host computer (5) via the testing machine (4), and the product (6) is connected to the adapter plate (3) via the upper needle membrane plate (1) and the lower needle membrane plate (2).

2. A test channel misinsertion prevention device according to claim 1, characterized in that: The SPARE_I2C_SCL pin and the SPARE_I2C_SDA pin of the first identification module (U1) are respectively connected to corresponding pins of the second identification module (U3).

3. A test channel misinsertion prevention device according to claim 1, characterized in that: The test channel mis-insertion prevention device further comprises a first connector (J1), a second connector (J2), and a third connector (J3); the adapter board (3) is connected to the test machine (4) via the first connector (J1), the second connector (J2), and the third connector (J3).

4. A test channel misinsertion prevention device according to claim 1, characterized in that: The test channel mis-insertion prevention device further comprises a fourth connector (J5) and a fifth connector (J6); the upper needle diaphragm plate (1) is connected to the adapter plate (3) via the fourth connector (J5); and the lower needle diaphragm plate (2) is connected to the adapter plate (3) via the fifth connector (J6).

5. A test channel misinsertion prevention device according to claim 1, characterized in that: The test channel mis-insertion prevention device further comprises a power supply module (U2), wherein the power supply module (U2) is connected to the first identification module (U1) and the second identification module (U3).

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