CN107526029B - Circuit board detection system and detection method - Google Patents
Circuit board detection system and detection method Download PDFInfo
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- CN107526029B CN107526029B CN201710929901.2A CN201710929901A CN107526029B CN 107526029 B CN107526029 B CN 107526029B CN 201710929901 A CN201710929901 A CN 201710929901A CN 107526029 B CN107526029 B CN 107526029B
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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
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2834—Automated test systems [ATE]; using microprocessors or computers
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a detection system and a detection method of a circuit board, wherein the detection system comprises a computer, a power relay array circuit board, a switching value control board, an analog value acquisition board, a video generation circuit board, a video acquisition board, an audio generation circuit board, an audio acquisition board and a communication detection circuit board, the relay array circuit board and the computer are respectively connected with the switching value control board, the analog value acquisition board, the video generation circuit board, the video acquisition board, the audio generation circuit board, the audio acquisition board and the communication detection circuit board, the relay array circuit board is provided with an input port and an output port, and the relay array circuit board is respectively connected with the switching value control board, the analog value acquisition board, the video generation circuit board, the video acquisition board, the audio generation circuit board, the audio acquisition board and the communication detection circuit board through the output port.
Description
Technical Field
The invention relates to the technical field of circuit board detection, in particular to a circuit board detection system and a circuit board detection method.
Background
With the development of electronic technology, electronic devices have become more powerful, and the integration level of circuit boards has become higher. When such circuit boards having high integration have an abnormality such as a short circuit or an open circuit, a technician is generally required to perform manual investigation in order to determine the position where the abnormality has occurred. The detection methods adopted in the current market mainly comprise detection methods such as an observation method, a measurement method, a tracking method, a replacement method, a comparison method and computer automatic detection. In the existing detection method, a computer automatic detection method has become a trend, for example, a practical patent with publication number CN201986083U, namely, an automatic detection device for a circuit board, in which an input/output controller controls on/off of a signal, but the controller can only control one path of signal, and the working efficiency is low, the reliability is poor, and the detection time is long.
Disclosure of Invention
In view of the above, the present invention aims at overcoming the drawbacks of the prior art, and it is a primary object of the present invention to provide a system and a method for detecting a circuit board, which can control multiple signals to perform multiple detections on the circuit board in a orderly manner, thereby greatly improving the working efficiency and reliability and saving the detection time.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The detection system of the circuit board comprises a computer, a power supply, a relay array circuit board, a switching value control board, an analog value acquisition board, a video generation circuit board, a video acquisition board, an audio generation circuit board, an audio acquisition board and a communication detection circuit board, wherein the relay array circuit board and the computer are respectively connected with the switching value control board, the analog value acquisition board, the video generation circuit board, the video acquisition board, the audio generation circuit board, the audio acquisition board and the communication detection circuit board;
the relay array circuit board is provided with an input port and an output port, the input port is an input end to be tested, and the relay array circuit board is respectively connected with the switching value control board, the analog value acquisition board, the video generation circuit board, the video acquisition board, the audio generation circuit board, the audio acquisition board and the communication detection circuit board through the output port;
During detection, the computer generates an electric signal and transmits the electric signal to the switching value control board, and the switching value control board selectively switches on and controls the circuits in the relay array circuit board.
As a preferable scheme, the output port comprises an OUT1 port, an OUT2 port and an OUT3 port, wherein the OUT3 port is connected with the switching value control board, and the OUT1 port and the OUT2 port are respectively connected with the input end of the analog value acquisition board, the input end of the video generation circuit board, the input end of the video acquisition board, the input end of the audio generation circuit board, the input end of the audio acquisition board and the input end of the communication detection circuit board after being connected in parallel to form a common end.
As a preferred aspect, the input ports include an IN1 port, an IN2 port, an IN3 port, an IN4 port, an IN5 port, an IN6 port, and an IN7 port.
As a preferable scheme, the IN1 port, the IN2 port, the IN3 port and the IN4 port are respectively connected with eight network cable ports, namely +12V, -12V, -V, AF audio lines, EX communication lines, + V, V video lines and NC empty ends;
The IN5 port, the IN6 port and the IN7 port are respectively connected with eight network cable ports, namely +12V, -12V, -32V, AF audio lines, EX communication lines, + V, V + video lines and V-video lines.
As a preferable scheme, the automatic control device also comprises an induction module for inducing whether the circuit board to be tested is placed on the station or not and a cylinder assembly for automatically controlling the connection of the circuit board to be tested.
A detection method of a circuit board is based on the detection system of the circuit board, a switching value control board is used for controlling gating of circuits in a relay array circuit board so as to sequentially detect multiple items of the circuit board to be detected, an analog quantity acquisition board is used for acquiring voltage and current of the circuit board to be detected, power supply detection is carried out, a video generation circuit board and a video acquisition board are used for carrying out comparison analysis on two video values after video signals are generated and pass through the circuit board to be detected, an audio generation circuit board and an audio acquisition board are used for carrying out comparison analysis on the audio signals generated and pass through the circuit board to be detected, then the two audio values are subjected to comparison analysis, and a communication detection circuit board is used for acquiring communication signals and carrying out communication circuit detection.
When the voltage and current obtained by detection are in a qualified range, and the front-back comparison of the video signal and the audio signal is in accordance with the standard, and the communication circuit is normal, the detection of the circuit board to be detected is qualified, the passing of detection is prompted on a computer, any one of the circuit boards is failed, the failing of detection is prompted on the computer, and the failed content or an error point is displayed.
As a preferred scheme, the output port comprises an OUT1 port, an OUT2 port and an OUT3 port, wherein the OUT3 port is connected with the switching value control board, and the OUT1 port and the OUT2 port are respectively connected with an input end of the analog value acquisition board, an input end of the video generation circuit board, an input end of the video acquisition board, an input end of the audio generation circuit board, an input end of the audio acquisition board and an input end of the communication detection circuit board after being connected in parallel to form a common end;
During analog quantity detection, the switching value control board respectively enables an IN1 port, an IN2 port, an IN3 port and an IN4 port IN the relay array circuit board to be connected with an OUT1 port, and the analog quantity acquisition board acquires voltage and current analog parameters of the circuit board to be detected to perform power supply detection;
When IN video detection, the switch value control board firstly enables an IN7 port and an OUT2 port IN the relay array circuit board to be communicated, then respectively enables an IN1 port, an IN2 port, an IN3 port and an IN4 port IN the relay array circuit board to be communicated with the OUT1 port, video signals generated by the video generating circuit board pass through the OUT2 port and the IN7 port and then pass through the circuit board to be detected, and then are collected by the video collecting board through the OUT1 port, and a computer carries OUT comparison analysis on two video values to carry OUT video detection;
during audio detection, the switch value control board firstly enables an IN7 port and an OUT2 port IN the relay array circuit board to be communicated, then respectively enables an IN1 port, an IN2 port, an IN3 port and an IN4 port IN the relay array circuit board to be communicated with the OUT1 port, audio signals generated by the audio generation circuit board pass through the OUT2 port and the IN7 port and then pass through the circuit board to be detected, are collected by the audio collection board through the OUT1 port, and are subjected to comparison analysis by a computer to carry OUT audio detection;
During communication detection, the switching value control board enables an IN1 port, an IN2 port, an IN3 port and an IN4 port IN the relay array circuit board to be connected with an OUT1 port respectively, and the communication detection circuit board collects communication signals of the circuit board to be detected and carries OUT communication circuit detection.
Compared with the prior art, the circuit board detection system has the advantages and beneficial effects that the circuit board detection system can control multiple paths of signals to realize that multiple detection of the circuit board can be orderly performed, so that whether the circuit board can normally work or not can be rapidly and accurately checked, abnormal points of the circuit board do not need to be checked manually, the working efficiency and the reliability are greatly improved, a large amount of time and labor are saved, the problems of low working efficiency, poor reliability, long detection time and the like in the circuit board detection in the prior art are effectively solved, and secondly, the circuit board detection system is ingenious and reasonable in design and is beneficial to orderly performance of an automatic detection process.
In order to more clearly illustrate the structural features and efficacy of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a block diagram of a circuit board inspection system connection in accordance with an embodiment of the present invention;
FIG. 2 is a block diagram of the general connections for analog quantity detection in an embodiment of the present invention;
FIG. 3 is a block diagram of the general connections for video detection in an embodiment of the present invention;
FIG. 4 is a block diagram of the general connections for audio detection in an embodiment of the invention;
FIG. 5 is a block diagram of the general connections for communication detection in an embodiment of the present invention;
Fig. 6 is a schematic flow chart of a method for inspecting a circuit board according to an embodiment of the invention.
The drawings and the description:
10. computer 20, power supply
30. Relay array circuit board 40 and switching value control board
50. Analog quantity acquisition board 60 and video generation circuit board
70. Video acquisition board 80 and audio generation circuit board
90. Audio acquisition board 100, communication detection circuit board.
Detailed Description
Referring to fig. 1 to 6, specific structures of a preferred embodiment of the present invention are shown. The detection system of a circuit board, as shown in fig. 1, comprises a computer 10, a power supply 20, a relay array circuit board 30, a switching value control board 40, an analog value acquisition board 50, a video generation circuit board 60, a video acquisition board 70, an audio generation circuit board 80, an audio acquisition board 90 and a communication detection circuit board 100, wherein:
the relay array circuit board 30 and the computer are respectively connected with the switch value control board 40, the analog value acquisition board 50, the video generation circuit board 60, the video acquisition board 70, the audio generation circuit board 80, the audio acquisition board 90 and the communication detection circuit board 100, and also comprise an induction module for inducing whether the circuit board to be detected is placed on the station or not and an air cylinder assembly for automatically controlling to be connected with the circuit board to be detected, when the induction module induces that the circuit board to be detected is placed on the station, the detection system drives the corresponding air cylinder to act so as to be connected with the circuit board to be detected.
The relay array circuit board 30 is provided with an input port and an output port, the input port is an input end to be tested, the relay array circuit board 30 is connected with the circuit board to be tested through the input port, the relay array circuit board 30 is respectively connected with the switching value control board 40, the analog value acquisition board 50, the video generation circuit board 60, the video acquisition board 70, the audio generation circuit board 80, the audio acquisition board 90 and the communication detection circuit board 100 through the output port, in the embodiment, the output port comprises an OUT1 port, an OUT2 port and an OUT3 port, the OUT3 port is connected with the switching value control board 40, the OUT1 port and the OUT2 port are connected in parallel to form a common end and then are respectively connected with the input end of the analog value acquisition board 50, the input end of the video generation circuit board 60, the input end of the video acquisition board 70, the input end of the audio generation circuit board 80, the input end of the audio acquisition board 90 and the input end of the communication detection circuit board 100, and the computer 10 generates an electric signal and transmits the electric signal to the switching value control board 40 when the switching value control board 40 is detected, and the circuit of the relay array 30 is selectively connected to the relay array circuit to realize the detection.
The INPUT ports include an IN1 port, an IN2 port, an IN3 port, an IN4 port, an IN5 port, an IN6 port, and an IN7 port; the IN1 port, the IN2 port, the IN3 port and the IN4 port are respectively connected with eight network cable ports, namely +12V, -12V, -32V, AF audio lines, EX communication lines, +32V, V video lines and NC empty ends; the IN5 port, the IN6 port and the IN7 port are respectively connected with eight network cable ports, namely +12V, -12V, -32V, AF audio lines, EX communication lines, +32V, V + video lines and V-video lines; specifically, the circuit board to be tested is provided with a SOUT port, a POUT port, an INPUT port, an FJ1 port, an FJ2 port, an FJ3 port and an FJ4 port, the IN7 port is respectively connected with the INPUT port through eight network wire ports (+ 12V, -32V, AF audio wires, an EX communication wire, +32V, V + video wire and a V-video wire), the IN6 port is respectively connected with the POUT port through eight network wire ports (+ 12V, -32V, AF audio wires, an EX communication wire, +32V, V + video wire and a V-video wire), the IN5 port is respectively connected with the SOUT port through eight network wire ports (+ 12V, -32V, AF audio wires, an EX communication wire, +32V, V + video wire and a V-video wire), the IN4 port is respectively connected with the SOUT port through eight network wire ports (+ 12V, -32V, AF audio wires, an EX communication wire, +32V, V video wire and a J1 port, and the IN3 port is respectively connected with the SOUT port through eight network wire ports (+ 12V, -12V V, AF audio wire, the NC 3 port and the N3 port +32V, V video line, NC empty end) is connected with FJ2 port, the IN2 port is connected with FJ3 port through eight net twine ports (+12V, -12V, -32V, AF audio line, EX communication line, +32V, V video line, NC empty end) respectively, the IN1 port is connected with FJ4 port through eight net twine ports (+12V, -12V, -32V, AF audio line, EX communication line, +32V, V video line, NC empty end) respectively, the to-be-tested circuit board is also provided with POWER port, the POWER port is connected with the output end of the POWER supply 20, IN this embodiment, the to-be-tested circuit board is powered by dual POWER source +32V, -32V, +12V, -12V, therefore, the output end of the POWER supply 20 is correspondingly four, all are connected with POWER port;
The invention discloses a detection method of a circuit board, which is shown in fig. 6 and is based on the detection system of the circuit board, wherein a switching value control board 40 is used for controlling gating of circuits in a relay array circuit board 30 so as to sequentially detect a plurality of circuit boards to be detected, and the invention researches the network port of the circuit board 4 to be detected, wherein the detection content comprises 12V working current, 32V working current, 12V voltage of a test host, 32V voltage of the test host, 12V voltage of a test sub-set, 32V voltage of the test sub-set, 1200Hz audio test, 2000Hz audio test, video signal test and communication signal detection;
The voltage and current of the circuit board to be tested are collected by the analog quantity collection board 50, power supply detection (comprising 12V working current, 32V working current, 12V voltage of a test host, 32V voltage of the test host, 12V voltage of the test slave and 32V voltage of the test slave) is carried out, video detection (comprising video signals) is carried out by utilizing the video generation circuit board 60 and the video collection board 70, through the generated video signals passing through the circuit board to be tested and then being collected back again, through the audio generation circuit board 80 and the audio collection board 90, through the generated audio signals passing through the circuit board to be tested and then being collected back again, then, the two audio values are compared and analyzed, audio detection (comprising 1200Hz audio and 2000Hz audio) is carried out, and communication circuit detection is carried out by utilizing the communication detection circuit board 100.
The detection step comprises the following steps of starting to enter a detection system, and when the detection system senses that a station is provided with a circuit board to be detected, driving a corresponding air cylinder to act to connect the circuit board to be detected by the detection system, and then powering on a computer 10, the circuit board to be detected, a switching value control board 40, an analog value acquisition board 50, a video generation circuit board 60, a video acquisition board 70, an audio generation circuit board 80, an audio acquisition board 90 and a communication detection circuit board 100 by a power supply 20;
when analog quantity detection is performed, the switching value control board 40 respectively enables an IN1 port, an IN2 port, an IN3 port and an IN4 port IN the relay array circuit board 30 to be connected with an OUT1 port, and the analog quantity acquisition board 50 acquires voltage and current analog parameters of the circuit board to be detected to perform power supply detection;
When IN video detection, the switch value control board 40 firstly enables the IN7 port and the OUT2 port IN the relay array circuit board 30 to be connected, then respectively enables the IN1 port, the IN2 port, the IN3 port and the IN4 port IN the relay array circuit board 30 to be connected with the OUT1 port, video signals generated by the video generating circuit board 60 pass through the circuit board to be detected after passing through the OUT2 port and the IN7 port, are collected by the video collecting board 70 through the OUT1 port, and the computer performs comparison analysis on the two video values to perform video detection;
When IN audio detection, the switch value control board 40 firstly enables the IN7 port and the OUT2 port IN the relay array circuit board 30 to be connected, then respectively enables the IN1 port, the IN2 port, the IN3 port and the IN4 port IN the relay array circuit board 30 to be connected with the OUT1 port, and audio signals generated by the audio generation circuit board 80 pass through the OUT2 port and the IN7 port and then pass through the circuit board to be detected, are collected by the audio collection board 90 through the OUT1 port, and are subjected to comparison analysis by a computer for two audio values to carry OUT audio detection;
finally, during the communication detection, the switch control board 40 respectively makes the IN1 port, the IN2 port, the IN3 port and the IN4 port IN the relay array circuit board 30 be connected with the OUT1 port, and the communication detection circuit board 100 collects the communication signals of the circuit board to be detected to perform the communication circuit detection;
After the detection is completed, when the voltage and the current obtained by the detection are in a qualified range, and the front-back comparison of the video signal and the audio signal is in accordance with the standard, and the communication circuit is normal, the detection of the circuit board to be detected is qualified, the passing of the detection is prompted on the computer 10, in the embodiment, "Pass" is displayed on the display screen of the computer 10, any item is failed, the failing of the detection is prompted on the computer 10, in the embodiment, "NG" is displayed on the display screen of the computer 10, and unqualified contents or error points are displayed.
In summary, the invention has the design key that the invention can realize the control of multiple signals so as to realize the orderly detection of multiple items of circuit boards, thereby being capable of rapidly and accurately detecting whether the circuit boards can normally work or not without manual detection, greatly improving the working efficiency and the reliability, saving a great deal of time and manpower, effectively solving the problems of low working efficiency, poor reliability, long detection time and the like in the detection of the circuit boards in the prior art, and secondly, the design of the detection system of the circuit boards is ingenious and reasonable, which is beneficial to orderly execution of the automatic detection process.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention are still within the scope of the technical solutions of the present invention.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710719537 | 2017-08-21 | ||
| CN2017107195377 | 2017-08-21 |
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| CN107526029A CN107526029A (en) | 2017-12-29 |
| CN107526029B true CN107526029B (en) | 2024-12-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109342918A (en) * | 2018-09-06 | 2019-02-15 | 广东芬尼克兹节能设备有限公司 | A kind of automatic test approach and system of heat pump control panel |
| CN109143042A (en) * | 2018-10-31 | 2019-01-04 | 重庆矢崎仪表有限公司 | FCT detection device and detection method based on optics and machine vision |
| CN110488178A (en) * | 2019-08-27 | 2019-11-22 | 厦门炬研电子科技有限公司 | A kind of circuit board automatic testing circuit |
| CN113791337B (en) * | 2021-11-16 | 2022-03-04 | 吉安县鑫盛电子有限公司 | Data processing-based quality analysis monitoring system for circuit board |
| CN116047271A (en) * | 2023-01-16 | 2023-05-02 | 荣湃半导体（上海）有限公司 | Automatic test system and automatic test method |
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