CN104994377A - Television machine vibration test method - Google Patents
Television machine vibration test method Download PDFInfo
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- CN104994377A CN104994377A CN201510414934.4A CN201510414934A CN104994377A CN 104994377 A CN104994377 A CN 104994377A CN 201510414934 A CN201510414934 A CN 201510414934A CN 104994377 A CN104994377 A CN 104994377A
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Abstract
The invention discloses a television machine vibration test method, which comprises the steps that: (1) a tested television plays standard sweep frequency sound signals in a sampling workshop environment, a first sampling module and a second sampling module acquires signals in at least one standard sweep frequency sound signal period simultaneously, the two paths of signals are subjected to analog-to-digital conversion through an analog-to-digital conversion module and then sent to a difference operation module, the difference operation module performs difference operation to obtain a structure abnormal sound signal; (2) and the obtained structure abnormal sound signal is compared with a threshold value, and a conclusion whether the machine vibration test is qualified or not is obtained and output. According to the television machine vibration test method, composite signals and background noise signals are acquired respectively through arranging two paths of acquisition modules, the structure abnormal sound signal which is capable of reflecting machine vibration condition can be obtained after difference operation through the difference operation module, the machine vibration condition is analyzed through comparing and analyzing the structure abnormal sound signal, the machine vibration test efficiency and accuracy are improved, and the test manpower cost is greatly reduced.
Description
Technical field
The invention belongs to tv test technical field, specifically, relate to a kind of TV set shake method of testing.
Background technology
TV system test code requirement all can the test request of organic shake to whether, but the test of current machine shake is all evaluate by people's ear subjectivity, waste time and energy, inefficiency and judging nicety rate is low, thus the television set of organic shake abnormal sound can be caused to come into the market, company and brand are caused to the image loss can not smeared and go out, based on this, how to invent a kind of TV set shake method of testing, can carry out industrial intelligent test to TV set shake, raising machine shake testing efficiency and accuracy are the technical problems that the present invention mainly solves.
Summary of the invention
In order to solve, current TV set shake detection is main to be detected by people's ear subjectivity in the present invention, and the technical problem that efficiency is low, reliability is low, proposes a kind of TV set and shake method of testing, can solve the problem.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of TV set shake method of testing, comprise the first sampling module, the second sampling module, analog-to-digital conversion module, memory module and output module, calculus of differences module, described first sampling module is arranged at the position near tested television set, described second sampling module is arranged at the position away from tested television set, and described TV set shake method of testing comprises the following steps:
(1), tested television for play standard frequency sweep tone signal in sampling workshop condition, described first sampling module and the second sampling module gather the signal at least one standard frequency sweep tone signal cycle simultaneously, wherein, the signal that first sampling module gathers is composite signal B, comprise: ambient noise signal, frequency sweep tone signal, and structure noise reduction, the signal that second sampling module gathers is ambient noise signal C, two paths of signals carries out after analog-to-digital conversion through analog-to-digital conversion module respectively, be sent to described calculus of differences module, described calculus of differences module is by composite signal B, ambient noise signal C and the frequency sweep tone signal be stored in described memory module carry out calculus of differences, obtain structure noise reduction,
(2), by obtained structure noise reduction and threshold value compare, draw machine shake test whether qualified conclusion exporting.
Further, before described step (1), be also included in the step of the standard frequency sweep tone signal gathering tested television for play in soundproof room environment:
Tested television for play standard frequency sweep tone signal in soundproof room environment, the standard frequency sweep tone signal of the tested television for play in first sampling module continuous acquisition at least one cycle, obtain frequency sweep tone signal, and carry out changing the described memory module of rear transmission via analog-to-digital conversion module and store.
Wherein, the frequency range of described standard frequency sweep tone signal is 20 ~ 2KHZ.
Preferably, in the step of the standard frequency sweep tone signal of the tested television for play of described collection, after the standard frequency sweep tone signal of the tested television for play in complete collection one cycle, output module exports sampling successfully prompting.
Further again, after described step (2), also comprise the step of prompting current test state, tested television set is after step (2) is completed, and tested television set stops playing standard frequency sweep tone signal, and the structure noise reduction that calculus of differences module exports reverses, detect that structure noise reduction reverses, judge that current tested tv test is complete, wait next tested television set to be accessed, and export information by output module.
Preferably, described output module is display translation module.
Further, in described step (2), also comprise the step of computer shake test passes rate.
A nearlyer step, in the step of described computer shake test passes rate, respectively test passes and underproof television set quantity are counted, after being all completed, calculating test passes rate, and exported by output module.
Wherein, described standard frequency sweep tone signal sends to tested television set by central TV signal cabin by tuner.
Compared with prior art, advantage of the present invention and good effect are: TV set shake method of testing of the present invention, respectively composite signal and ambient noise signal are gathered by arranging two-way acquisition module, by calculus of differences module by composite signal, after ambient noise signal and the standard frequency sweep tone signal be stored in described memory module carry out calculus of differences, the structure noise reduction that can react machine earthquake situations condition can be obtained, by comparative analysis structure noise reduction analytical engine earthquake situations condition, this method of testing significantly improves machine shake testing efficiency and accuracy, greatly reduce test human cost.
After reading the detailed description of embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of embodiment functional-block diagram of TV set shake method of testing proposed by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one, the present embodiment proposes a kind of TV set shake method of testing, as shown in Figure 1, for the hardware module block diagram involved by this TV set shake method of testing, comprise the first sampling module, second sampling module, analog-to-digital conversion module, memory module, output module, and calculus of differences module, from layout aspect, space, described first sampling module is arranged at the position near tested television set, described second sampling module is arranged at the position away from tested television set, for gathering ambient noise signal, described TV set shake method of testing comprises the following steps:
S1, tested television for play standard frequency sweep tone signal in sampling workshop condition, described first sampling module and the second sampling module gather the signal at least one standard frequency sweep tone signal cycle simultaneously, wherein, the signal that first sampling module gathers is composite signal B, comprise: ambient noise signal, frequency sweep tone signal, and structure noise reduction, the signal that second sampling module gathers is ambient noise signal C, two paths of signals carries out after analog-to-digital conversion through analog-to-digital conversion module respectively, be sent to described calculus of differences module, described calculus of differences module is by composite signal B, ambient noise signal C and the frequency sweep tone signal be stored in described memory module carry out calculus of differences, obtain structure noise reduction,
S2, obtained structure noise reduction and threshold value to be compared, draw machine shake test whether qualified conclusion exporting.
The TV set shake method of testing of the present embodiment, respectively composite signal and ambient noise signal are gathered by arranging two-way acquisition module, described first sampling module is arranged near the position of tested television set (within general half meter, but be not limited to above-mentioned distance, can adjust according to actual working environment), therefore be composite signal in the signal that the first sampling module gathers, comprise ambient noise signal and the frequency sweep tone signal coming from tested television set, and structure noise reduction, because the second sampling module is comparatively far away by (general four apart from the position of tested television set, five meters, but be not limited to above-mentioned distance, can adjust according to actual working environment), the frequency sweep tone signal that ambient noise signal sends much larger than tested television set and structure noise reduction, what it was collected substantially is all workshop condition noise, by calculus of differences module by composite signal B, after ambient noise signal C and the frequency sweep tone signal be stored in described memory module carry out calculus of differences, the structure noise reduction that can react machine earthquake situations condition can be obtained, therefore by comparative analysis structure noise reduction analytical engine earthquake situations condition, this method of testing significantly improves machine shake testing efficiency and accuracy, greatly reduce test human cost.
Preferably in the present embodiment, before described step S1, the step of the standard frequency sweep tone signal gathering tested television for play in soundproof room environment is also included in:
Tested television for play standard frequency sweep tone signal in soundproof room environment, the standard frequency sweep tone signal of the tested television for play in first sampling module continuous acquisition at least one cycle, obtain frequency sweep tone signal, and carry out changing the described memory module of rear transmission via analog-to-digital conversion module and store.By gathering by tested television for play standard frequency sweep tone signal, obtain frequency sweep tone signal and store, the frequency sweep tone signal stored by this tested television for play out, ensure that consistent with the frequency sweep sound comprised in composite signal B in step S2, because be tested television set play and also respectively receive by the first sampling module, the consistency of its sound source and acquisition module can ensure the consistency of two signals, if directly in the words of memory module storage standards frequency sweep sound, meeting the part comprising standard frequency sweep sound gathered in signal B is through tested television for play, then through the reception collection of the first sampling module, signal waveform is in broadcasting, transmission, change in gatherer process, therefore after calculus of differences, the precision of structure noise reduction cannot ensure.Wherein, described standard frequency sweep audio frequency range is 20 ~ 2KHZ.
The ambient noise signal of the second sampling module collection in certain large regions in the present embodiment is identical with the ambient noise signal in the signal of the second acquisition module collection, under MCU controls, (MCU intercepts one section of frequency sweep cycle signal automatically with the standard pure cycle 20 ~ 2KHZ frequency sweep sound previously stored in a storage module, swept-frequency signal automatically amputated and will not contrast aperiodic), the basic operation of voice signal is done, that is: structure noise reduction A=(composite signal B in calculus of differences unit)-(ambient noise signal C)-(frequency sweep tone signal); It should be noted that, the calculus of differences of the present embodiment is all the computing between identical frequency, and the different place of frequency will not calculate, to ensure the accuracy calculated.
Wherein, described frequency sweep sound sends to tested television set by central TV signal cabin by tuner, is convenient to realize.
In order to export sampled result in time, in the step of the standard frequency sweep sound of the tested television for play of described collection, after the standard frequency sweep sound of the tested television for play in complete collection one cycle, output module exports sampling successfully prompting, for pointing out to tester, to perform testing procedure, save the testing time.
After described step S2, also comprise the step of prompting current test state, tested television set is after step S2 is completed, tested television set stops playing frequency sweep sound, the structure noise reduction that calculus of differences module exports reverses, detect that structure noise reduction reverses, judge that current tested tv test is complete, etc. next tested television set to be accessed, and export information by output module, for informing that this test period of tester completes, waiting for next tested television set access, improving testing efficiency.
Preferably in the present embodiment, described output module is display translation module, such as, in soundproof room environment tested television for play standard frequency sweep foot rapid in, when after sampling achievement, " to be sampled successfully " printed words by display translation module display translation, point out, or after current tested television set completes test, when waiting for next tested television set access, by display translation module display translation " to be tested " printed words, result exports more directly perceived.
Grasp the machine shake Qualification of tested television set for the ease of tester's entirety, in described step S2, also comprise the step of computer shake test passes rate.
Concrete, in the step of computer shake test passes rate, respectively test passes and underproof television set quantity are counted, after being all completed, calculating test passes rate, and exported by output module.The present embodiment is by the statistics of Auto-counting in test process, and without the need to artificial special statistics, improve statistical efficiency, statistics is by display translation, more intuitively convenient.
Certainly; above-mentioned explanation is not limitation of the present invention; the present invention is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (9)
1. a TV set shake method of testing, it is characterized in that, comprise the first sampling module, the second sampling module, analog-to-digital conversion module, memory module and output module, calculus of differences module, described first sampling module is arranged at the position near tested television set, described second sampling module is arranged at the position away from tested television set, and described TV set shake method of testing comprises the following steps:
(1), tested television for play standard frequency sweep tone signal in sampling workshop condition, described first sampling module and the second sampling module gather the signal at least one standard frequency sweep tone signal cycle simultaneously, wherein, the signal that first sampling module gathers is composite signal B, comprise: ambient noise signal, frequency sweep tone signal, and structure noise reduction, the signal that second sampling module gathers is ambient noise signal C, two paths of signals carries out after analog-to-digital conversion through analog-to-digital conversion module respectively, be sent to described calculus of differences module, described calculus of differences module is by composite signal B, ambient noise signal C and the frequency sweep tone signal be stored in described memory module carry out calculus of differences, obtain structure noise reduction,
(2), by obtained structure noise reduction and threshold value compare, draw machine shake test whether qualified conclusion exporting.
2. TV set shake method of testing according to claim 1, is characterized in that, before described step (1), be also included in the step of the standard frequency sweep tone signal gathering tested television for play in soundproof room environment:
Tested television for play standard frequency sweep tone signal in soundproof room environment, the standard frequency sweep tone signal of the tested television for play in first sampling module continuous acquisition at least one cycle, obtain frequency sweep tone signal, and carry out changing the described memory module of rear transmission via analog-to-digital conversion module and store.
3. TV set shake method of testing according to claim 2, it is characterized in that, the frequency range of described standard frequency sweep tone signal is 20 ~ 2KHZ.
4. TV set shake method of testing according to claim 2, it is characterized in that, in the step of the standard frequency sweep tone signal of the tested television for play of described collection, after the standard frequency sweep tone signal of the tested television for play in complete collection one cycle, output module exports sampling successfully prompting.
5. TV set shake method of testing according to claim 1, it is characterized in that, after described step (2), also comprise the step of prompting current test state, tested television set is after step (2) is completed, tested television set stops playing standard frequency sweep tone signal, the structure noise reduction that calculus of differences module exports reverses, detect that structure noise reduction reverses, judge that current tested tv test is complete, etc. next tested television set to be accessed, and export information by output module.
6. the TV set shake method of testing according to any one of claim 1-5, it is characterized in that, described output module is display translation module.
7. TV set shake method of testing according to claim 1, is characterized in that, in described step (2), also comprises the step of computer shake test passes rate.
8. TV set shake method of testing according to claim 7, is characterized in that, in the step of described computer shake test passes rate, respectively test passes and underproof television set quantity are counted, after being all completed, calculating test passes rate, and exported by output module.
9. the TV set shake method of testing according to any one of claim 1-5, it is characterized in that, described standard frequency sweep tone signal sends to tested television set by central TV signal cabin by tuner.
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| CN201510414934.4A CN104994377B (en) | 2015-07-15 | 2015-07-15 | A kind of television set machine shakes method of testing |
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Cited By (3)
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| CN105979255A (en) * | 2016-06-28 | 2016-09-28 | 青岛歌尔声学科技有限公司 | Audio acquisition tooling, method and cloud server |
| CN105979260A (en) * | 2016-06-28 | 2016-09-28 | 青岛歌尔声学科技有限公司 | Machine vibration test tooling, system and method for audio output equipment |
| CN108184109A (en) * | 2017-12-19 | 2018-06-19 | 北京经纬恒润科技有限公司 | The test platform and test method of a kind of vehicle-mounted information and entertainment system |
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Cited By (5)
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| CN108184109A (en) * | 2017-12-19 | 2018-06-19 | 北京经纬恒润科技有限公司 | The test platform and test method of a kind of vehicle-mounted information and entertainment system |
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| CN104994377B (en) | 2017-03-08 |
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