CN110967623B - ICT (information communication technology) extension fixture for testing number of pins of PCBA (printed circuit board assembly) board and testing method - Google Patents
ICT (information communication technology) extension fixture for testing number of pins of PCBA (printed circuit board assembly) board and testing method Download PDFInfo
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- CN110967623B CN110967623B CN201911415204.0A CN201911415204A CN110967623B CN 110967623 B CN110967623 B CN 110967623B CN 201911415204 A CN201911415204 A CN 201911415204A CN 110967623 B CN110967623 B CN 110967623B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/2806—Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
- G01R31/2808—Holding, conveying or contacting devices, e.g. test adapters, edge connectors, extender boards
Abstract
The invention relates to an ICT extension fixture and a test method for testing the number of pins of a PCBA board, which comprises the following steps: the PCBA placing plate, the probe assembly, the interface plate, the interface needle assembly, the first lead, the second lead, the third lead, the clamp shell and the relay; the PCBA placing plate is covered and sealed and installed at the top end of the clamp shell, and the probe assembly is arranged in the PCBA placing plate; the interface board is packaged at the bottom end of the clamp shell, and the interface pins are all arranged in the interface board; the probe assembly includes: the tail end of the first probe is connected with one end of a first lead, and the other end of the first lead is connected with a first interface needle; the tail end of the second probe is connected with one end of a second lead, the other end of the second lead is connected with the relay, one end of a third lead is connected with the relay, and the other end of the third lead is connected with a second interface needle. The invention has the advantages of convenient operation, high working efficiency, simple structure, greatly reduced hardware cost and strong practicability.
Description
Technical Field
The utility model discloses automatic test technical field, more specifically say, relate to an ICT extension anchor clamps and test method for testing PCBA board needle point quantity.
Background
An In Circuit Tester (In Circuit Tester) is a common test device for electronic enterprises. The PCBA board produced by an enterprise is detected by matching with the clamp, and various defects caused by defects of devices on the PCBA board, circuits in the PCB and process reasons can be judged. The conventional ICT equipment has fixed testing pin point quantity, and when the pin point quantity required to be tested by the PCBA does not exceed the testing point of the ICT equipment, the clamp can be normally manufactured according to the requirement for testing the PCBA. However, when the number of the pins to be tested on the PCBA board is greater than the number of the test points of the ICT device, the excess part of the pins to be tested cannot be tested, and the following three solutions are generally adopted in the prior art to solve the problem:
the first scheme is as follows: 2, manufacturing 2 clamps, and testing 1 PCBA board by 2 times to meet the requirement that the number of PCBA test points does not exceed the number of measurable needle points of ICT equipment, wherein the method doubles the hardware cost, needs a large amount of manpower and material resources, is long in time consumption and low in test efficiency;
the second scheme is as follows: the ICT equipment with more test points is used, so that the problem is solved, but the ICT equipment with more test points is very expensive and high in cost;
in the third scheme: the test content is reduced, some test points are cancelled, the number of the pins of the fixture is less than or equal to the maximum test point number of the ICT equipment, the hardware cost is not additionally increased, but the situation that a certain probability of defective products cannot be detected and the product quality is influenced because part of the test pins are cancelled and the test content of the PCBA is reduced is avoided.
In view of the above, the above drawbacks of the prior art need to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problems that in the prior art, hardware cost is high, testing efficiency is low, and a large amount of manpower and material resources are consumed, and in the prior art, defective products cannot be detected due to testing missing.
The technical scheme adopted by the invention for solving the technical problems is as follows: the ICT extension fixture and the test method for testing the number of the pins of the PCBA board are constructed, the function that one test point on the ICT equipment can detect two corresponding pins to be tested on the PCBA board is realized by adding one relay between a fixture probe and a connecting wire of an interface pin, the condition that the number of the test pins of the PCBA board exceeds the number of the test points of the ICT equipment can be well met when the PCBA board is tested, the operation is convenient, the working efficiency is high, test missing or mistest cannot occur, the hardware cost is greatly reduced due to the simple structure, and the practicability is strong.
The ICT extension fixture and the test method for testing the number of the pins of the PCBA board comprise the following steps: the PCBA placing plate, the probe assembly, the interface plate, the interface needle assembly, the first lead, the second lead, the third lead, the clamp shell and the relay;
the PCBA placing plate is covered and sealed and installed at the top end of the clamp shell, and the probe assembly is arranged in the PCBA placing plate;
interface board encapsulates in anchor clamps shell bottom, and the interface needle includes: the interface board comprises a first interface needle and a second interface needle, wherein the first interface needle and the second interface needle are both arranged in the interface board;
the probe assembly includes: the tail end of the first probe is connected with one end of a first lead, and the other end of the first lead is connected with a first interface needle;
the tail end of the second probe is connected with one end of a second lead, the other end of the second lead is connected with the relay, one end of a third lead is connected with the relay, and the other end of the third lead is connected with a second interface needle.
In an ICT extension fixture for testing the number of pins of a PCBA board of the present invention, a PCBA placement board comprises: the probe mounting plate comprises a support plate and a probe mounting plate;
the support plate sets up the top of placing the board at PCBA, and the bottom of board is placed at PCBA to the probe mounting panel setting.
In the ICT extension fixture for testing the number of the needle points of the PCBA board, the first probe and the second probe are both arranged in the probe installation board.
In the ICT extension fixture for testing the number of the needle points of the PCBA board, the probe mounting plate is provided with a plurality of probe mounting holes, and the number of the probe mounting holes is the sum of the number of the first probes and the number of the second probes.
In an ICT extension fixture for testing the number of pin points of a PCBA board of the present invention, a relay includes: a public end, a normally closed end, a normally open end and a power end;
the public end is connected with one end of a third conducting wire, and the other end of the third conducting wire is connected with a second interface needle;
the normally closed end is connected with one end of a second lead, and the other end of the second lead is connected with a second probe.
In the ICT extension fixture for testing the number of the pins of the PCBA board, the power supply end is connected with one end of the fourth wire, and the other end of the fourth wire is connected with the power supply terminal of the ICT equipment.
In the ICT extension fixture for testing the number of the needle points of the PCBA board, the normally open end is connected with another second lead, and the other end of the second lead is connected with another second probe.
The ICT extension fixture testing method for testing the number of the pins of the PCBA board comprises the following steps:
s1, subtracting the number of ICT equipment test points from the number of the needle points on the PCBA board to be tested to obtain the number of relays to be configured, and installing the relays with the corresponding number in the clamp;
s2, placing the PCBA board to be tested on the carrier plate for the first test, wherein the relay is not electrified, and the common end of the relay is conducted with the normally closed end, so that the test point of the ICT equipment is conducted with a second probe connected to the normally closed end, namely the second probe is conducted with the ICT equipment corresponding to the to-be-tested probe on the PCBA board to be tested;
and S3, after the first test is completed, the relay is electrified through the ICT equipment, the relay starts to work, the common end of the relay is disconnected from the normally closed end and is conducted with the normally open end, at the moment, the test point of the ICT equipment is conducted with the second probe connected to the normally open end, namely, the to-be-tested probe point on the PCBA board to be tested corresponding to the second probe connected to the normally open end is conducted with the ICT equipment, and the test is completed.
In the ICT extension fixture testing method for testing the number of the pin points of the PCBA board, the purpose that the ICT equipment is communicated with the pin points to be detected is achieved by switching the power-on and the power-off of the relay at any time through the control terminal.
In the ICT extension fixture testing method for testing the number of the pin points of the PCBA board, the number of the relays depends on the number of the pin points on the PCBA board to be tested exceeding the number of the test points on the ICT equipment, and if the number of the pin points on the PCBA board to be tested is equal to the number of the test points on the ICT equipment, the relays can be selected not to be installed.
According to the ICT extension fixture and the ICT extension method for testing the number of the pins of the PCBA board, the relay is additionally arranged between the fixture probe and the connecting wire of the interface pin, so that the function that one test point on the ICT equipment can detect two corresponding pins to be tested on the PCBA board can be realized, when the number of the pins of the PCBA board is tested, the condition that the number of the test pins of the PCBA board exceeds the number of the test points of the ICT equipment can be well met, the operation is convenient, the working efficiency is high, the test omission or the mistest cannot be caused, the hardware cost is greatly reduced due to the simple structure, and the practicability is high.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a cross-sectional view of an ICT expansion fixture for testing the number of pin points on a PCBA board;
FIG. 2 is a perspective view of an ICT extension fixture for testing the number of pin points on a PCBA board;
FIG. 3 is a circuit diagram of a relay power-off state of an ICT extension fixture for testing the number of pins of a PCBA board;
FIG. 4 is a diagram of a relay power-on state circuit of an ICT extension fixture for testing the number of pin points on a PCBA board;
FIG. 5 is a functional block diagram of an ICT extended fixture test method for testing the number of pins on a PCBA board.
In the figure, 1, a PCBA board to be tested; 2. PCBA placing plate; 21. a carrier plate; 22. a probe mounting plate; 3. a probe assembly; 31. a first probe; 32. a second probe; 4. an interface board; 5. an interface needle assembly; 51. a first interface pin; 52. a second interface pin; 6. a first conductive line; 7. a second conductive line; 8. a third conductive line; 9. a clamp housing; 10. a relay; 11. a power supply terminal; 12. a fourth conductive line; 13. ICT equipment power supply terminals; 14. a normally closed end; 15. a normally open end; 16. a common terminal; 17. a power source.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 5, an ICT extension fixture and a testing method for testing the number of pins of a PCBA board includes: the PCBA placing board 2, the probe assembly 3, the interface board 4, the interface needle assembly 5, the first lead 6, the second lead 7, the third lead 8, the clamp shell 9 and the relay 10;
the PCBA placing plate 2 is mounted at the top end of the clamp shell 9 in a covering mode, and the probe assembly 3 is arranged in the PCBA placing plate 2;
the probe assembly 3 includes: a first probe 31 and a second probe 32, wherein the tail end of the first probe 31 is connected with one end of a first lead 6, and the other end of the first lead 6 is connected with a first interface needle 51;
the tail end of the second probe 32 is connected with one end of a second lead 7, the other end of the second lead 7 is connected with the relay 10, one end of a third lead 8 is connected with the relay 10, and the other end of the third lead 8 is connected with the second interface pin 52.
Further, the PCBA placement board 2 includes: a carrier plate 21 and a probe mounting plate 22;
the carrier plate 21 sets up on PCBA places the top of board 2, and probe mounting panel 22 sets up on PCBA places the bottom of board 2.
Further, the first probe 31 and the second probe 32 are both mounted in the probe mounting plate 22.
Further, the probe mounting plate 22 is provided with a plurality of probe mounting holes, and the number of the probe mounting holes is the sum of the number of the first probes 31 and the number of the second probes 32.
Further, the relay 10 includes: a common terminal 16, a normally closed terminal 14, a normally open terminal 15, and a power source terminal 11;
the common terminal 16 is connected with one end of a third conducting wire 8, and the other end of the third conducting wire 8 is connected with a second interface pin 52;
the normally closed terminal 14 is connected to one end of the second wire 7, and the other end of the second wire 7 is connected to the second probe 32.
Further, a power source terminal 11 is connected to one end of a fourth wire 12, and the other end of the fourth wire 12 is connected to an ICT equipment power terminal 13.
Further, the ICT equipment power terminal 13 is configured to interface with the ICT equipment power supply 17, and the power supply 17 supplies current and voltage to the relay 10 through the ICT equipment power terminal 13.
Further, it is characterized in that the normally open end 15 is connected to another second wire 7, and the other end of the second wire 7 is connected to another second probe 32.
An ICT extension fixture test method for testing the number of pins of a PCBA board comprises the following steps:
s1, subtracting the number of ICT equipment test points from the number of the needle points on the PCBA board 1 to be tested to obtain the number of the relays 10 to be configured, and installing the relays 10 with the corresponding number in the fixture;
s2, placing the PCBA board 1 to be tested on the carrier plate 21 for the first test, and not electrifying the relay 10, wherein the common end 16 of the relay 10 is conducted with the normally closed end 14, so that the test point of the ICT equipment is conducted with the second probe 32 connected to the normally closed end 14, that is, the second probe 32 is conducted with the ICT equipment corresponding to the pin point to be tested on the PCBA board 1 to be tested;
after the first test of S3 is completed, the relay 10 is powered on through the ICT device, the relay 10 starts to work, the common end 16 of the relay 10 is disconnected from the normally closed end 14 and is conducted with the normally open end 15, at this time, the test point of the ICT device is conducted with the second probe 32 connected to the normally open end 15, that is, the probe point to be measured on the PCBA board 1 to be measured, which corresponds to the second probe 32 connected to the normally open end 15, is conducted with the ICT device, and the test is completed.
Further, the relay 10 is switched to be powered on and off at any time through the control terminal, so that the ICT equipment is communicated with the needle points to be detected.
Further, the number of the relays 10 depends on the number of the pins on the PCBA board 1 to be tested exceeding the test points on the ICT equipment, and if the number of the pins on the PCBA board 1 to be tested is equal to the number of the test points on the ICT equipment, the relays 10 may be selected not to be installed.
Furthermore, a device is added between connecting lines of the fixture probes and the interface pins, so that 1 test point on the ICT equipment corresponds to 2 probes on the fixture and 2 test points on the PCBA board.
Further, when the relay 10 is not energized, the common terminal 16 of the relay 10 is conducted with the normally closed terminal 14; the test point on the ICT equipment is conducted with the probe on the clamp, namely the test point on the PCBA board corresponding to the second probe 32 is conducted with the ICT equipment;
after the first test is finished, the relay 10 is powered on through a power supply 17 of the ICT equipment, the relay 10 works, and the common end 16 of the relay 10 is disconnected with the normally closed end 14 and is connected with the normally open end 15; at this time, another set of the second probes 32 is conducted with the ICT device corresponding to the test point on the PCBA to be tested.
Furthermore, when the clamp is manufactured, a corresponding number of relays 10 are arranged in the clamp according to the number exceeding the ICT equipment test points;
when the PCBA is tested, the relay 10 is not electrified to work, and the ICT equipment tests the needle point of the normal wiring of the clamp (namely, the first probe 31 corresponds to the needle point to be tested on the PCBA board 1 to be tested) and the needle point part (namely, the second probe 32 connected to the normally closed end 14 corresponds to the needle point to be tested on the PCBA board 1) wired to the normally closed end 14 of the relay 10; then, the relay 10 is powered on to work under the control of an ICT test program, and the ICT equipment tests the pin point part (namely the pin point to be tested on the PCBA board 1 to be tested corresponding to the second probe 32 connected to the normally open end 15) connected to the normally open end 15 of the relay 10.
In addition, the relay 10 can be switched on/off at any time through a test program according to needs, and the purpose that ICT equipment is communicated with needed needle points is achieved.
The invention provides an ICT extension fixture and a test method for testing the number of pins of a PCBA board, which realize the function that one test point on ICT equipment can detect two corresponding pins to be tested on the PCBA board by adding a relay between a fixture probe and a connecting wire of an interface pin, and can well cope with the condition that the number of the test pins of the PCBA board exceeds the number of the test points of the ICT equipment when the number of the pins of the PCBA board is tested.
Although the present invention has been described with reference to the above embodiments, the scope of the present invention is not limited thereto, and modifications, substitutions and the like of the above members are intended to fall within the scope of the claims of the present invention without departing from the spirit of the present invention.
Claims (1)
1. An ICT extension fixture test method for testing the number of pins of a PCBA board is characterized in that:
the ICT extension anchor clamps include: the PCBA placing plate, the probe assembly, the interface plate, the interface needle assembly, the first lead, the second lead, the third lead, the clamp shell and the relay;
the PCBA placing board is mounted at the top end of the clamp shell in a covering mode, and the probe assembly is arranged in the PCBA placing board;
the interface board is packaged in the anchor clamps shell bottom, the interface needle includes: the interface board comprises a first interface pin and a second interface pin, wherein the first interface pin and the second interface pin are both arranged in the interface board;
the probe assembly includes: the tail end of the first probe is connected with one end of the first lead, and the other end of the first lead is connected with the first interface needle;
the tail end of the second probe is connected with one end of the second lead, the other end of the second lead is connected with the relay, one end of the third lead is connected with the relay, and the other end of the third lead is connected with the second interface needle;
the PCBA places the board and includes: the probe mounting plate comprises a support plate and a probe mounting plate;
the carrier plate is arranged at the top end of the PCBA placing plate, and the probe mounting plate is arranged at the bottom end of the PCBA placing plate; the first probe and the second probe are both mounted in the probe mounting plate;
a plurality of probe mounting holes are formed in the probe mounting plate, and the number of the probe mounting holes is the sum of the number of the first probes and the number of the second probes;
the relay includes: a public end, a normally closed end, a normally open end and a power end;
the public end is connected with one end of the third conducting wire, and the other end of the third conducting wire is connected with the second interface pin;
the normally closed end is connected with one end of the second lead, and the other end of the second lead is connected with the second probe;
the power supply end is connected with one end of a fourth wire, and the other end of the fourth wire is connected with a power supply wiring terminal of ICT equipment;
the normally open end is connected with another second wire, and the other end of the second wire is connected with another second probe; the test method comprises the following steps:
s1, subtracting the number of ICT equipment test points from the number of the needle points on the PCBA board to be tested to obtain the number of relays to be configured, and installing the relays with the corresponding number in the clamp;
s2, placing the PCBA board to be tested on the carrier board for the first test, wherein the relay is not electrified, and at the moment, the common end of the relay is conducted with the normally closed end, so that the test point of the ICT equipment is conducted with a second probe connected to the normally closed end, namely the second probe is conducted with the ICT equipment corresponding to the probe point to be tested on the PCBA board to be tested;
s3, after the first test is completed, the relay is powered on through the ICT equipment, the relay starts to work, the common end of the relay is disconnected from the normally closed end and is communicated with the normally open end, at the moment, the test point of the ICT equipment is communicated with the second probe connected to the normally open end, namely, the probe point to be tested on the PCBA board to be tested, which corresponds to the second probe connected to the normally open end, is communicated with the ICT equipment, and the test is completed;
the number of the relays depends on the number of the test points on the PCBA board to be tested exceeding the number of the test points on the ICT equipment, and if the number of the test points on the PCBA board to be tested is equal to the number of the test points on the ICT equipment, the relays can be selected not to be installed;
the ICT equipment is communicated with the needle point to be detected by switching the power-on and power-off of the relay at any time through the control terminal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911415204.0A CN110967623B (en) | 2019-12-31 | 2019-12-31 | ICT (information communication technology) extension fixture for testing number of pins of PCBA (printed circuit board assembly) board and testing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911415204.0A CN110967623B (en) | 2019-12-31 | 2019-12-31 | ICT (information communication technology) extension fixture for testing number of pins of PCBA (printed circuit board assembly) board and testing method |
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| CN110967623A CN110967623A (en) | 2020-04-07 |
| CN110967623B true CN110967623B (en) | 2020-10-16 |
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| CN111458622A (en) * | 2020-04-15 | 2020-07-28 | 深圳市明信测试设备有限公司 | Online ultra-thin camera PCB board retinue FCT test fixture |
| CN112731902B (en) * | 2020-11-26 | 2022-02-01 | 重庆科凯前卫风电设备有限责任公司 | Flexible testing platform for wind turbine generator control system and working method of flexible testing platform |
| CN113359005B (en) * | 2021-05-18 | 2023-03-28 | 深圳市海创嘉科技有限公司 | Clamp and method for testing pin points of PCBA (printed circuit board assembly) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08146089A (en) * | 1994-11-16 | 1996-06-07 | Hitachi Ltd | Test apparatus for electronic circuit board and jig therefor |
| CN101315411A (en) * | 2007-05-31 | 2008-12-03 | 安捷伦科技有限公司 | System, method and apparatus for testing circuit combination |
| US20090091342A1 (en) * | 2007-10-03 | 2009-04-09 | Agilent Technologies, Inc. | Node Extender for In-Circuit Test Systems |
| CN102445614B (en) * | 2011-09-30 | 2015-01-21 | 苏州工业园区世纪福科技有限公司 | Universal signal routing system for electronic product function test |
| CN203117380U (en) * | 2013-03-01 | 2013-08-07 | 深圳雷杜生命科学股份有限公司 | Testing device of printed circuit board assembly (PCBA) of medical instrument |
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Address after: 518000 the first floor, second floor, third floor, fourth floor and fifth floor of 16 workshops in antuoshan high tech Industrial Park, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Mingxin testing equipment Co., Ltd Address before: Baoan District manhole Street Xinsha road Shenzhen city Guangdong province 518000 security supporting mountain High-tech Industrial Park 16 Applicant before: SHENZHEN MASON TEST EQUIPMENT Co.,Ltd. |
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