CN102087336A - Method and system for detecting video/audio signal circuit board - Google Patents
Method and system for detecting video/audio signal circuit board Download PDFInfo
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Abstract
The invention discloses a method and system for detecting a video/audio signal circuit board. The method comprises the following steps: A, placing a video/audio signal circuit board in a test frame of a test system, opening a power test voltage, and inputting multiple kinds of signals corresponding to a TV mode or game mode; B, acquiring the image signal of LVDS format (low voltage differential signaling), audio signal, voltage and current output by the video/audio signal circuit board, comparing with the parameters stored in the test system, and comparing the image signal of LVDS format according to pixels of three primary colors to judge whether the image signal is in a preset normal threshold range; and comparing the audio signal according to the frequency characteristic to judge whether the frequency and signal-to-noise ratio are in the preset normal threshold range; and C, testing the key function and software version of the video/audio signal circuit board, and finally displaying a corresponding test report. According to the invention, a circuit board with video/audio signal function can be quickly and accurately detected, and the product detection efficiency is improved.
Description
Technical field
The present invention relates to the Electronic Testing field, relate in particular to a kind of method and system thereof that detects the video/audio signal circuit board.
Background technology
When producing in batches, what the Performance Detection of audio frequency and video adopted is the mode of the artificial subjective assessment of listening, seeing at traditional LCD TV plate, plasma shows signal disposable plates, has problems such as low, the easy test leakage of testing efficiency, accuracy rate be not high.At present the special test macro of neither one is automatically to the circuit board of multiple band video/audio signal, comprise the circuit-board card of audio-video interface such as liquid crystal display signal disposable plates, LCD TV signal-processing board, plasm TV signal-processing board, projector signal-processing board, DVD decoding deck, multimedia player integrated circuit board etc., carry out accurate detection.
Summary of the invention
The object of the invention provides a kind of method and system thereof that detects the video/audio signal circuit board, and the input signal of multiple simulation can be provided, and fast, accurately detects the circuit board with video/audio signal function, has improved the product detection efficiency.
A kind of method that detects the video/audio signal circuit board that the embodiment of the invention provides comprises step
A, tested video/audio signal circuit board is put into the testing jig of test macro, the opening power test voltage is imported the signal of multiple corresponding TV pattern or game mode;
LVDS format-pattern signal, sound signal, voltage, the electric current of B, the described video/audio signal circuit board output of collection, compare with the canonical parameter of storing in the test macro, be the signal of PCI-E form with described LVDS format-pattern conversion of signals and compare, judge whether in default normal threshold values scope according to the three primary colours pixel; Described sound signal is compared according to frequency characteristic, and whether determination frequency, signal to noise ratio (S/N ratio) be in default normal threshold values scope;
Keypress function, the software version of C, the described video/audio signal circuit board of test, the Center For Information Management that all test data results is sent to test macro carries out inductive statistics, shows corresponding test report.
Further, described steps A also comprises: scan the sequence number of described video/audio signal circuit board, with described sequence number first field as the corresponding test report of test macro output.
Further, the signal that the employing FPGA is the PCI-E form with described LVDS format-pattern conversion of signals among the described step B compares according to the three primary colours pixel, analyze the blending ratio and the intensity of the pixel red-green-blue of display image, judge whether in default normal threshold values scope, and the result that outputs test data.
Further, at least a input signal that produces in multi-channel audio signal, VGA signal, DVI signal, YUV signal, HDMI signal, AV signal, SVIDEO signal, SCART signal, anolog TV signals, digital television signal, network video signal, the multimedia interface input signal by signal source generator is given tested video/audio signal circuit board.
Further, adopting FPGA (FPGA) among the described step B is that the signal of PCI-E form is analyzed with the LVDS format-pattern conversion of signals of output, judges whether in default normal threshold values scope.
Described method can the detection LCD monitor signal-processing board, LCD TV signal-processing board, plasm TV signal-processing board, projector signal-processing board, DVD decoding deck, multimedia player integrated circuit board.
The embodiment of the invention also provides a kind of system that detects the video/audio signal circuit board, comprises signal source generator, signal picker, signal analysis and processing device, input/output control unit, Center For Information Management;
Described signal source generator is connected by video/audio signal circuit board tested in many input data lines and the testing jig; Video/audio signal circuit board output terminal tested in described signal picker and the described testing jig is connected, and gathers LVDS format-pattern signal, sound signal, voltage, the electric current of described tested video/audio signal circuit board output; Described signal analysis and processing device is connected with signal source generator, signal picker, input/output control unit, Center For Information Management respectively, LVDS format-pattern signal, sound signal, voltage, electric current that the described video/audio signal circuit board that is used for gathering is exported, compare with the canonical parameter of storing in the test macro, be the signal of PCI-E form with described LVDS format-pattern conversion of signals and compare, judge whether in default normal threshold values scope according to the three primary colours pixel; Described sound signal is compared according to frequency characteristic, and whether determination frequency, signal to noise ratio (S/N ratio) be in default normal threshold values scope; Described signal analysis and processing device is also tested keypress function, the software version of described tested video/audio signal circuit board, all test datas is sent to described Center For Information Management carries out inductive statistics, and control shows corresponding test report.
Further, described signal analysis and processing device scans the sequence number of described tested video/audio signal circuit board by signal picker, with described sequence number first field as the corresponding test report of system's output.
Further, described signal source generator is connected with tested video/audio signal circuit board in the testing jig by at least a in the multi-channel audio signal line, VGA signal wire, DVI signal wire, YUV signal line, HDMI signal wire, AV signal wire, SVIDEO signal wire, SCART signal wire, anolog TV signals line, digital television signal line, network video signal line, multimedia interface input signal cable.
Further, the signal that it is the PCI-E form with described LVDS format-pattern conversion of signals that described signal picker adopts FPGA sends described signal analysis and processing device to, compare according to the three primary colours pixel, analyze the blending ratio and the intensity of the pixel red-green-blue of display image, judge whether in default normal threshold values scope, and the result that outputs test data.
Described Center For Information Management comprises statistical module, stored data base, output display module; Described stored data base is preserved the tested video/audio signal circuit board output data that is used to judge comparative standard parameter and collection.
Adopt the method and the system thereof of detection video/audio signal circuit board of the present invention, be to comprise image by introducing, audio frequency, voltage, current acquisition is analyzed, intelligence computer control means relatively, realize picture signal, voice signal, voltage, the automatic test of electric current and various input/output port functions, this system is the signal of PCI-E form with described LVDS format-pattern conversion of signals and compares according to the three primary colours pixel, improved data rate, can support the concurrent testing of a plurality of tested objects simultaneously, and utilize computer realization ancillary statistics function, can be to voltage, electric current, image, sound, keypress functions etc. carry out comprehensive automatic test and export test report by the product ID standardization.And the test result report is corresponding one by one with test product by sequence number, can not make mistakes, promote product function accuracy rating of tests in the production run like this, reduce technical ability requirement the test man, reduce erroneous judgement and test leakage examination that human factor causes, promote the efficient of test link.
Description of drawings
Fig. 1 is that the embodiment of the invention one provides the method step figure that detects the video/audio signal circuit board.
Fig. 2 is that the embodiment of the invention two provides the method step figure that detects the video/audio signal circuit board.
Fig. 3 is that a kind of system architecture and data that detect the video/audio signal circuit board that the embodiment of the invention three provides transmit synoptic diagram.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, the embodiment of the invention one provides the method that detects the video/audio signal circuit board, comprises step:
101, tested video/audio signal circuit board is put into the testing jig of test macro, the opening power test voltage is imported the signal of multiple corresponding TV pattern or game mode;
102, gather LVDS format-pattern signal, sound signal, voltage, the electric current of described video/audio signal circuit board output, compare with the canonical parameter of storing in the test macro, be the signal of PCI-E form with described LVDS format-pattern conversion of signals and compare, judge whether in default normal threshold values scope according to the three primary colours pixel; Described sound signal is compared according to frequency characteristic, and whether determination frequency, signal to noise ratio (S/N ratio) be in default normal threshold values scope;
103, keypress function, the software version of the described video/audio signal circuit board of test, the Center For Information Management that all test data results is sent to test macro carries out inductive statistics, shows corresponding test report.
Concrete, as shown in Figure 2, the embodiment of the invention two provides the method that detects the video/audio signal circuit board, comprises step:
201,, and, then tested integrated circuit board is put into testing jig this sequence number first field as system's output test report by the first sequence number of the tested integrated circuit board of scanning of signal picker, open tested integrated circuit board the power supply of corresponding testing jig.
202, press the beginning testing button after, described detection system detects initial voltage and sends power-on command for tested integrated circuit board, whether the start voltage that detects tested integrated circuit board simultaneously normal, if start voltage reaches preset value, represents that then tested integrated circuit board operating voltage is qualified.
203, after detecting normal boot-strap, described detection system sends the signal that order transmits corresponding TV pattern or game mode to signal source generator, send corresponding mode command to the TV integrated circuit board simultaneously, voltage after starting shooting then, testing current, test the image under the associative mode simultaneously, audio signals etc. produce multi-channel audio signal by signal source generator, the VGA signal, the DVI signal, YUV signal, the HDMI signal, the AV signal, the SVIDEO signal, the SCART signal, anolog TV signals, digital television signal, network video signal, at least a input signal in the multimedia interface input signal is given tested integrated circuit board.
Concrete, the signal that the employing FPGA is the PCI-E form with described LVDS format-pattern conversion of signals compares according to the three primary colours pixel, analyze the blending ratio and the intensity of the pixel red-green-blue of display image, judge whether in default normal threshold values scope, and the result that outputs test data.In coloured image, each pixel can be represented with mixed shades, saturation degree and the brightness of red-green-blue.If judge it is in default normal threshold values scope, think that then the image function of tested integrated circuit board is qualified; Described sound signal is compared according to frequency characteristic, whether determination frequency, signal to noise ratio (S/N ratio) be in default normal threshold values scope, if think that then the sound signal function of tested integrated circuit board is qualified again.
204, test that the keypress function, the software version that carry out tested integrated circuit board after all patterns of setting again detect, the step of the initial setting up of dispatching from the factory, last behind the sequence number of correspondence, output test result and send into information center automatically and add up, export the test report of the project situations such as voltage, electric current, image, sound, keypress function of tested integrated circuit board automatically.
With LCD TV signal Processing integrated circuit board is example, by gathering LVDS picture signal, sound signal, voltage, electric current, can inspect demonstration, broadcast, decoding and control function under any signal conditioning that this Board Under Test is stuck in input, with the automatic test that realizes all functions that this integrated circuit board is supported and output test report to information center.
As shown in Figure 3, the embodiment of the invention three also provides a kind of system that detects the video/audio signal circuit board, comprises signal source generator, signal picker, signal analysis and processing device, input/output control unit, Center For Information Management;
Described signal source generator is connected by video/audio signal circuit board tested in many input data lines and the testing jig; Video/audio signal circuit board output terminal tested in described signal picker and the described testing jig is connected, and gathers LVDS format-pattern signal, sound signal, voltage, the electric current of described tested video/audio signal circuit board output; Described signal analysis and processing device is connected with signal source generator, signal picker, input/output control unit, Center For Information Management respectively, LVDS format-pattern signal, sound signal, voltage, electric current that the described video/audio signal circuit board that is used for gathering is exported, compare with the canonical parameter of storing in the test macro, be the signal of PCI-E form with described LVDS format-pattern conversion of signals and compare, judge whether in default normal threshold values scope according to the three primary colours pixel; Described sound signal is compared according to frequency characteristic, and whether determination frequency, signal to noise ratio (S/N ratio) be in default normal threshold values scope; Described signal analysis and processing device is also tested keypress function, the software version of described tested video/audio signal circuit board, all test datas is sent to described Center For Information Management carries out inductive statistics, and control shows corresponding test report.
Described signal analysis and processing device scans the sequence number of described tested video/audio signal circuit board by signal picker, with described sequence number first field as the corresponding test report of system's output.Just can chaotic substandard products and specification product when on flow production line, detecting large-tonnage product like this, realize the scientific and standard management.
Described signal source generator is connected with tested video/audio signal circuit board in the testing jig by at least a in the multi-channel audio signal line, VGA signal wire, DVI signal wire, YUV signal line, HDMI signal wire, AV signal wire, SVIDEO signal wire, SCART signal wire, anolog TV signals line, digital television signal line, network video signal line, multimedia interface input signal cable.
It is that the signal of PCI-E form sends described signal analysis and processing device to the LVDS format-pattern conversion of signals of output that described signal picker adopts FPGA (FPGA).The resolution of supporting is up to 1920*1080/120Hz, can support the LVDS signal of 10 of binary channels, and described signal picker can possess good compatibility like this by the liquid crystal display display parameter of different model are set in software.
Described Center For Information Management comprises statistical module, stored data base, output display module; Described stored data base is preserved the tested video/audio signal circuit board output data that is used to judge comparative standard parameter and collection.Stored data base can be storage chip, perhaps is the test database server.
In service at test macro, the signal analysis and processing device adopts command function to carry out operating and setting by input/output control unit to target test integrated circuit board, target test integrated circuit board has a response cycle to command function, also need the feedback signal analysis processor after target test integrated circuit board is finished setting, finish to confirm command execution.Traditional system adopts the both-way communication response mode, and in the face of the multiple product test time, every kind of target test products all will increase the testing service program like this, and workload and complexity all can increase.System of the present invention makes full use of the feature and function of target test integrated circuit board, and test board is stuck under the specified conditions, the specific identification information that in image output, superposes, by after the test computer image acquisition as feedback response information.
Input signal channel handoff functionality in the TV for example, operation switches to the TV passage, the signal analysis and processing device can be sent out an order that switches to the TV passage, when target test integrated circuit board is received instruction, spending 1 to 2 second time switches to the TV passage, when carrying out the switching channel order, the target integrated circuit board can eject a passage information " TV " in the own active area upper left corner at the TV output image, test computer is by picture catching, recognize the information of " TV " in the image, can confirm that passage switches and finish, enter the follow-up test link.
The above is a preferred implementation of the present invention; certainly can not limit the present invention's interest field with this; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; can also make some improvement and change, these improvement and change also are considered as protection scope of the present invention.
Claims (10)
1. a method that detects the video/audio signal circuit board is characterized in that, comprises step
A, tested video/audio signal circuit board is put into the testing jig of test macro, the opening power test voltage is imported the signal of multiple corresponding TV pattern or game mode;
LVDS format-pattern signal, sound signal, voltage, the electric current of B, the described video/audio signal circuit board output of collection, compare with the canonical parameter of storing in the test macro, be the signal of PCI-E form with described LVDS format-pattern conversion of signals and compare, judge whether in default normal threshold values scope according to the three primary colours pixel; Described sound signal is compared according to frequency characteristic, and whether determination frequency, signal to noise ratio (S/N ratio) be in default normal threshold values scope;
Keypress function, the software version of C, the described video/audio signal circuit board of test, the Center For Information Management that all test data results is sent to test macro carries out inductive statistics, shows corresponding test report.
2. according to the method for the described detection video/audio signal of claim 1 circuit board, it is characterized in that,
Described steps A also comprises: scan the sequence number of described video/audio signal circuit board, with described sequence number first field as the corresponding test report of test macro output.
3. according to the method for the described detection video/audio signal of claim 1 circuit board, it is characterized in that,
The signal that the employing FPGA is the PCI-E form with described LVDS format-pattern conversion of signals among the described step B compares according to the three primary colours pixel, analyze the blending ratio and the intensity of the pixel red-green-blue of display image, judge whether in default normal threshold values scope, and the result that outputs test data.
4. according to the method for the described detection video/audio signal of claim 1 circuit board, it is characterized in that, give tested video/audio signal circuit board by at least a input signal that signal source generator produces in multi-channel audio signal, VGA signal, DVI signal, YUV signal, HDMI signal, AV signal, SVIDEO signal, SCART signal, anolog TV signals, digital television signal, network video signal, the multimedia interface input signal.
5. according to the method for the described detection video/audio signal of claim 1 circuit board, it is characterized in that described method can the detection LCD monitor signal-processing board, LCD TV signal-processing board, plasm TV signal-processing board, projector signal-processing board, DVD decoding deck, multimedia player integrated circuit board.
6. a system that detects the video/audio signal circuit board is characterized in that, comprises signal source generator, signal picker, signal analysis and processing device, input/output control unit, Center For Information Management;
Described signal source generator is connected by video/audio signal circuit board tested in many input data lines and the testing jig; Video/audio signal circuit board output terminal tested in described signal picker and the described testing jig is connected, and gathers LVDS format-pattern signal, sound signal, voltage, the electric current of described tested video/audio signal circuit board output; Described signal analysis and processing device is connected with signal source generator, signal picker, input/output control unit, Center For Information Management respectively, LVDS format-pattern signal, sound signal, voltage, electric current that the described video/audio signal circuit board that is used for gathering is exported, compare with the canonical parameter of storing in the test macro, be the signal of PCI-E form with described LVDS format-pattern conversion of signals and compare, judge whether in default normal threshold values scope according to the three primary colours pixel; Described sound signal is compared according to frequency characteristic, and whether determination frequency, signal to noise ratio (S/N ratio) be in default normal threshold values scope; Described signal analysis and processing device is also tested keypress function, the software version of described tested video/audio signal circuit board, all test datas is sent to described Center For Information Management carries out inductive statistics, and control shows corresponding test report.
7. according to the system of the described detection video/audio signal of claim 6 circuit board, it is characterized in that, described signal analysis and processing device scans the sequence number of described tested video/audio signal circuit board by signal picker, with described sequence number first field as the corresponding test report of system's output.
8. according to the system of the described detection video/audio signal of claim 6 circuit board, it is characterized in that described signal source generator is connected with tested video/audio signal circuit board in the testing jig by at least a in the multi-channel audio signal line, VGA signal wire, DVI signal wire, YUV signal line, HDMI signal wire, AV signal wire, SVIDEO signal wire, SCART signal wire, anolog TV signals line, digital television signal line, network video signal line, multimedia interface input signal cable.
9. according to the system of the described detection video/audio signal of claim 6 circuit board, it is characterized in that, the signal that it is the PCI-E form with described LVDS format-pattern conversion of signals that described signal picker adopts FPGA sends described signal analysis and processing device to, compare according to the three primary colours pixel, analyze the blending ratio and the intensity of the pixel red-green-blue of display image, judge whether in default normal threshold values scope, and the result that outputs test data.
10. according to the system of the described detection video/audio signal of claim 6 circuit board, it is characterized in that described Center For Information Management comprises statistical module, stored data base, output display module; Described stored data base is preserved the tested video/audio signal circuit board output data that is used to judge comparative standard parameter and collection.
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| CN102421011A (en) * | 2011-09-14 | 2012-04-18 | 厦门华侨电子股份有限公司 | Fast detection system of television mainboard |
| CN104469353A (en) * | 2014-12-11 | 2015-03-25 | 武汉精测电子技术股份有限公司 | Device for detecting quality of LVDS video signals |
| CN104486616A (en) * | 2014-12-11 | 2015-04-01 | 武汉精测电子技术股份有限公司 | Device for quality detection of TTL (transistor-transistor logic) video signals |
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| CN107315665A (en) * | 2017-06-07 | 2017-11-03 | 深圳市鼎盛光电有限公司 | The detection method and its device of a kind of multimedia board |
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| CN111999639A (en) * | 2020-08-27 | 2020-11-27 | 皇晶科技股份有限公司 | Analysis method and system capable of simultaneously detecting multiple groups of mixed signals |
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| CN104469353A (en) * | 2014-12-11 | 2015-03-25 | 武汉精测电子技术股份有限公司 | Device for detecting quality of LVDS video signals |
| CN104486616A (en) * | 2014-12-11 | 2015-04-01 | 武汉精测电子技术股份有限公司 | Device for quality detection of TTL (transistor-transistor logic) video signals |
| CN105049837A (en) * | 2015-07-08 | 2015-11-11 | 太仓市同维电子有限公司 | AV port audio measurement method |
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| CN105676109B (en) * | 2016-01-08 | 2019-08-02 | 青岛海信电器股份有限公司 | A kind of motherboard test method and equipment |
| CN106199249A (en) * | 2016-06-28 | 2016-12-07 | 积成电子股份有限公司 | A kind of automatic closed loop test system towards intelligent substation and method of testing |
| CN106454329A (en) * | 2016-10-26 | 2017-02-22 | 中国电子产品可靠性与环境试验研究所 | Image acquisition detection system and method |
| CN107315665A (en) * | 2017-06-07 | 2017-11-03 | 深圳市鼎盛光电有限公司 | The detection method and its device of a kind of multimedia board |
| CN109874006A (en) * | 2019-01-09 | 2019-06-11 | 惠州凯珑光电有限公司 | A kind of novel PDM audio-video test macro and method |
| CN111901589A (en) * | 2020-07-29 | 2020-11-06 | 深圳市泰霖科技有限公司 | Automatic test system for television mainboard |
| CN111999639A (en) * | 2020-08-27 | 2020-11-27 | 皇晶科技股份有限公司 | Analysis method and system capable of simultaneously detecting multiple groups of mixed signals |
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